A shock-absorbing and fall-preventing crutch

Abstract

The present invention relates to a shock-absorbing and anti-fall crutch, comprising a crutch body, a base, a suction cup, a regulating valve body, a piston, and a shock-absorbing elastic member. The base is provided with a mounting cavity and a vent connected to the mounting cavity. The bottom end of the crutch body extends into the mounting cavity, and the crutch body and the base are slidably fitted. The suction cup is mounted at the bottom end of the base, and a negative pressure zone is formed between the suction cup and the bottom of the base. A vent connecting the mounting cavity and the negative pressure zone is provided at the bottom of the base. The regulating valve body is located in the vent and controls the opening or closing of the vent. The piston is slidably mounted in the mounting cavity, the top end of the piston is connected to the bottom end of the crutch body, and the bottom end thereof is connected to the regulating valve body. The shock-absorbing elastic member is located in the mounting cavity and below the piston, and the two ends of the shock-absorbing elastic member are respectively connected to the piston and the base. The present invention can effectively prevent the bottom of the crutch from slipping and drifting on slippery roads, thereby causing users, especially the elderly, to fall.

Description

Technical Field

[0001] The present invention relates to the technical field of crutch, in particular to a shock-absorbing and fall-preventing crutch. Background Art

[0002] A cane is an important medical rehabilitation aid that provides shock absorption and prevents falls. It comes in various types, including a cane, elbow cane, and axillary cane. While a cane is the most commonly used walking aid for the elderly, there are many different types, most of which utilize a rod-shaped structure to provide simple auxiliary support. In actual use, especially in places like hospitals and nursing homes, where surfaces are typically smooth, such as tiled or wooden floors, the bottom of the cane can slip and drift while walking, causing the user to lose their balance and fall, presenting a significant risk.

[0003] Although various types of smart crutches have been developed, for example, patent publication number CN214483534U discloses a shock-absorbing, anti-fall crutch with multiple functions to prevent falls and injuries. During actual use, when a user falls, they can control the airbag switch, causing the controller to control the airbag to quickly inflate and then pop out, achieving fan-shaped support at the lower end of the second rod body, effectively providing its support effect. Alternatively, they can press the LED light post switch to control the LED light post through the controller, which can serve as a warning to other people and improve safety during use. The user can also control the sound through the sound switch, increasing the user's enjoyment of use. When the user needs to pick up an item, the controller can control the telescopic cylinder to retract, which can pull the clamping rod to rotate upward to clamp the item, making it easier for the user to pick up the item. However, this multifunctional anti-fall crutch fails to enhance the cane's fall prevention function, focusing more on accident resolution and entertainment. Furthermore, it is relatively expensive, making it difficult for the elderly to adopt it. Summary of the Invention

[0004] Based on this, it is necessary to provide a shock-absorbing and anti-fall crutch in response to the current situation in hospitals and nursing homes, which are basically smooth roads such as tiles and wooden floors. The bottom of the crutches are easy to slip and the user may fall. The current smart crutches fail to enhance the fall prevention function, focus more on accident resolution and entertainment, and are relatively expensive, which is not conducive to the popularization of the technology among the elderly consumer group.

[0005] The present invention provides a shock-absorbing and fall-preventing crutch for assisting a user in walking. The crutch comprises a crutch body; the crutch further comprises:

[0006] The base is provided with a mounting cavity and a vent communicated with the mounting cavity; the bottom end of the crutch body extends into the mounting cavity and the crutch body and the base are slidably engaged;

[0007] A suction cup is mounted on the bottom of the base to form a negative pressure zone between the suction cup and the bottom of the base; a vent hole is provided at the bottom of the base to connect the mounting cavity and the negative pressure zone;

[0008] a regulating valve body, which is located in the vent hole and controls the opening or closing of the vent hole;

[0009] The piston is slidably mounted in the mounting cavity, the top end of the piston is detachably connected to the bottom end of the crutch body and the bottom end is connected to the top end of the regulating valve body, and the piston has a first motion state and a second motion state; when the piston is in the first motion state, the piston moves downward with the crutch body and drives the regulating valve body to close the vent; when the piston is in the second motion state, the piston moves upward with the crutch body and drives the regulating valve body to open the vent;

[0010] The first shock-absorbing elastic member is located in the installation cavity and below the piston. Two ends of the first shock-absorbing elastic member are respectively connected to the piston and the base.

[0011] In a preferred embodiment of the present invention, a mounting hole is provided at the bottom of the base, connecting the mounting cavity and the negative pressure zone. A fixed valve body is threadedly connected to the mounting hole. The bottom of the fixed valve body extends into the negative pressure zone and a plurality of vent holes are provided through the fixed valve body.

[0012] The regulating valve body comprises a conical section and a cylindrical section. The conical section is threaded with the piston and the outer diameter of the conical section matches the diameter of the vent hole. The bottom of the cylindrical section extends into the negative pressure area and is connected to a rigid base at its bottom. A gap is left between the cylindrical section and the fixed valve body and a second shock-absorbing elastic member is provided in the gap and is sleeved on the outside of the cylindrical section. The top end of the second shock-absorbing elastic member is fixed to the fixed valve body and the bottom end is fixed to the top end of the rigid base. In a natural state, the rigid base is received in the gap.

[0013] In a preferred embodiment of the present invention, an annular groove is provided on the outer wall of the tapered section of the regulating valve body, and a sealing ring is installed in the annular groove to achieve sealing between the regulating valve body and the fixed valve body.

[0014] In a preferred embodiment of the present invention, the crutch further comprises:

[0015] A rigid stopper, which is annular in structure and is sleeved on the outside of the fixed valve body, and the bottom of the rigid stopper is concave to form a plurality of radial grooves; and

[0016] The inner spherical bearing is installed in the rigid stopper, the inner ring of the inner spherical bearing is connected to the outer valve body and the outer ring of the inner spherical bearing is connected to the rigid stopper.

[0017] In a preferred embodiment of the present invention, the base comprises:

[0018] The seat body is cylindrical and has a groove formed inwardly at its top. A vent communicating with the groove is provided on the side of the seat body, and a mounting hole communicating with the mounting cavity and the negative pressure zone is provided at the bottom of the seat body.

[0019] The end cover is detachably connected to the top of the base body to form the installation cavity between the end cover and the base body, and a mounting opening is opened through the end cover; the bottom end of the crutch body passes through the mounting opening and extends into the installation cavity to be connected with the piston thread, and the crutch body and the end cover are clearance-matched.

[0020] In a preferred embodiment of the present invention, the crutch further comprises:

[0021] a lampshade fixedly sleeved on the bottom end of the crutch body;

[0022] An LED light strip installed in the lampshade;

[0023] a power supply installed in the crutch body and used to power the LED light strip;

[0024] A light-controlled switch, which is installed in the crutch body and is used to control the on / off between the power supply and the LED light strip;

[0025] A single chip microcomputer is installed in the crutch body and is electrically connected to the light-controlled switch;

[0026] and / or, a light sensor mounted on the crutch body and electrically connected to a power supply and a single-chip microcomputer, the light sensor detecting light intensity and feeding back a light signal to the single-chip microcomputer, which controls the opening and closing of the light-controlled switch according to the light signal;

[0027] And / or, an infrared discharge sensor is installed on the crutch body and electrically connected to the power supply and the single-chip microcomputer. The infrared discharge sensor detects whether there are pedestrians approaching the crutch body and feeds back pedestrian signals to the single-chip microcomputer. The single-chip microcomputer controls the opening and closing of the light-controlled switch according to the pedestrian signals.

[0028] In a preferred embodiment of the present invention, the crutch body further comprises:

[0029] A BDS positioning module is installed in the crutch body and is electrically connected to the power supply and the single chip microcomputer; and

[0030] The BDS button is installed at the top of the crutch body and is used to control the connection and disconnection between the power supply and the BDS positioning module.

[0031] In a preferred embodiment of the present invention, the crutch body comprises:

[0032] a telescopic outer rod having a sliding cavity extending from its bottom surface to its interior;

[0033] The telescopic inner rod has a bottom end extending into the mounting cavity and connected to the piston, and a top end of the telescopic inner rod is slidably arranged in the sliding cavity. The length of the telescopic inner rod in the sliding cavity is adjustable and the telescopic inner rod can be fixedly connected to the telescopic outer rod;

[0034] A gripping handle is mounted on the top of the telescopic outer rod.

[0035] In a preferred embodiment of the present invention, the telescopic outer rod is provided with a lock hole communicating with the sliding cavity and a plurality of latch holes located below the lock hole, and the lock hole and the plurality of latch holes are distributed in a straight line;

[0036] A connector is fixed to the top of the telescopic inner rod and the connector is slidably matched with the sliding cavity. A return spring connected to the connector is provided in the sliding cavity, and a spring buckle that can be clamped into a lock hole or a clamping hole is provided on the connector.

[0037] In a preferred embodiment of the present invention, a support frame is fixed to the outer wall of the telescopic outer rod, and a plurality of screws are threadedly connected to the support frame. The plurality of screws are respectively arranged in one-to-one correspondence with the plurality of clamping holes, and the screws are provided with abutment blocks that can extend into the corresponding clamping holes.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The shock-absorbing and anti-fall crutch provided by the present invention is provided with a base, a suction cup, an adjusting valve body, and a piston. When the user walks on a slippery ground, a certain negative pressure can be formed in the suction cup so that the suction cup is firmly adsorbed on the ground. At this time, the crutch cannot move horizontally, which can prevent the bottom of the crutch from slipping and drifting, causing the user, especially the elderly, to fall.

[0040] 2. The crutch body of the present invention is detachably connected to the piston, so that the crutch body can be separated from the base. This allows other existing bases to be replaced in other usage scenarios, making it easier for users to better use the crutch in different scenarios, thereby improving the practicality and applicability of the present invention and achieving multiple uses of one crutch.

[0041] 3. The shock-absorbing and anti-fall crutch provided by the present invention has a first shock-absorbing elastic member and a second shock-absorbing elastic member. When the crutch body moves downward or upward, the first shock-absorbing elastic member and the second shock-absorbing elastic member will be squeezed or stretched. The first shock-absorbing elastic member and the second shock-absorbing elastic member will both exert a reaction force on the crutch body, slowing down the downward or upward speed of the crutch body, avoiding sudden changes in speed, reducing the force exerted on the user, especially the elderly, when the crutch lands or leaves the ground, and reducing the impact of the force on the user, especially the elderly, on their bones.

[0042] 4. The shock-absorbing and anti-fall crutch provided by the present invention, through the provision of a lampshade and LED light strip, expands the lighting range, eliminates lighting blind spots, and improves the safety of nighttime crutch use. Furthermore, the provision of a photosensor and an infrared discharge sensor provides unique advantages at night, making it easy to find and assist walking.

[0043] 5. The shock-absorbing and anti-fall crutch provided by the present invention has higher positioning accuracy through the setting of the BDS positioning module and the BDS button.

[0044] 6. The shock-absorbing and anti-fall crutch provided by the present invention features a telescopic outer rod and inner rod that are telescopically connected. These rods can be extended when needed and retracted when not in use, reducing space usage. The crutch can be collapsed and stored when in a vehicle or other public transportation. Furthermore, the telescopic outer rod and inner rod are telescopically connected, allowing for adjustable length to meet the needs of different people and situations, while also making it easy to extend and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic structural diagram of a shock-absorbing and anti-fall crutch provided in Example 1 of the present invention;

[0046] Figure 2 for Figure 1 Side view of

[0047] Figure 3 for Figure 2 Partial cross-sectional view at point A in the middle;

[0048] Figure 4 for Figure 3 Schematic diagram of part of the structure;

[0049] Figure 5 for Figure 1 Schematic diagram of part of the structure;

[0050] Figure 6 A schematic structural diagram of a crutch body in a shock-absorbing and fall-preventing crutch provided in Example 2 of the present invention;

[0051] Figure 7 A module connection diagram of the crutch body of the shock-absorbing and fall-preventing crutch provided in Example 2 of the present invention;

[0052] Figure 8 for Figure 7 Control principle diagram;

[0053] Figure 9 A circuit diagram of a shock-absorbing and fall-preventing crutch provided in Example 2 of the present invention, in which RG of the crutch body is a photoresistor;

[0054] Figure 10This is a circuit diagram of the lighting control system module of the crutch body in the shock-absorbing and fall-preventing crutch provided in Example 2 of the present invention;

[0055] Figure 11 A pulse width modulation circuit diagram of the crutch body of the shock-absorbing and fall-preventing crutch provided in Example 2 of the present invention;

[0056] Figure 12 A schematic structural diagram of a crutch body in a shock-absorbing and fall-preventing crutch provided in Example 3 of the present invention;

[0057] Figure 13 for Figure 12 Schematic diagram of part of the structure;

[0058] Figure 14 for Figure 13 Enlarged structural diagram at point B in the middle.

[0059] Figure 1: Crutch body; 1-1: Telescopic outer rod; 1-2: Telescopic inner rod; 1-3: Gripping handle; 1-11: Lock hole; 1-12: Clamp hole; 1-13: Support frame; 1-14: Screw; 1-15: Abutment block; 1-21: Connector; 1-22: Spring buckle; 1-23: Return spring; 2: Base; 2-1: Base body; 2-2: End cover; 2-3: Anti-slip cover; 2-4: Mounting cavity; 2-11: Insert Groove; 2-12, vent; 2-13, mounting hole; 2-21, plug-in plate; 3, suction cup; 3-1, tightening belt; 4, stud; 5, piston; 6, shock-absorbing elastic part 1; 7-1, fixed valve body; 7-11, vent; 7-2, regulating valve body; 7-3, sealing ring; 8, rigid base; 8-1, gasket; 9, shock-absorbing elastic part 2; 10, rigid stopper; 11, internal spherical bearing; 12, lampshade; 13, BDS button. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] Example 1

[0062] Please combine Figure 1-Figure 3 This embodiment provides a shock-absorbing and anti-fall crutch, which is used to assist users in walking, including a crutch body 1, a base 2, a suction cup 3, a regulating valve body 7-2, a piston 5 and a shock-absorbing elastic member 6.

[0063] Combine Figure 4In this embodiment, the base 2 includes a base body 2-1 and an end cap 2-2. The base body 2-1 is cylindrical and has a recessed groove formed inwardly at its top. At least two slots 2-11 are formed at the top of the base body 2-1. A ring-shaped retaining groove is formed at the bottom of the side wall of the base body 2-1. A vent 2-12 is formed on the side of the base body 2-1 and communicates with the recessed groove. A mounting hole 2-13 is formed at the center of the bottom of the base body 2-1 and communicates with the recessed groove. A fixed valve body 7-1 is threadedly mounted in the mounting hole 1-13 of the base 2. A vent hole 7-11 is formed through the fixed valve body 7-1. The end cover 2-2 is arranged at the top of the base body 2-1 and the end cover 2-2 is provided with at least two plug-in plates 2-21. The at least two plug-in plates 2-21 are respectively inserted into at least two slots 2-11 and the plug-in plates 2-21 are connected to the base body 2-1 through bolts. The end cover 2-2 and the base body 2-1 cooperate to form an installation cavity 2-4, and an installation opening is opened through the end cover 2-2.

[0064] The top end of the suction cup 3 is locked into the slot, and a tightening band 3-1 is provided around the outer surface of the suction cup 3, securing the suction cup 3 to the base 2-1. A negative pressure zone is formed between the suction cup 3 and the bottom of the base 2. The vent 7-11 of the fixed valve body 7-1 connects the mounting cavity 2-4 with the negative pressure zone, and the bottom end of the fixed valve body 7-1 extends into the negative pressure zone. The suction cup 3 can be made of an elastic material, such as rubber.

[0065] The bottom end of the crutch body 1 passes through the installation opening and extends into the installation cavity 2-4, and the crutch body 1 and the end cover 2-2 are clearance-matched. The bottom of the crutch body 1 is fixedly covered with an anti-slip cover 2-3, and the bottom of the anti-slip cover 2-3 fits the top surface of the end cover 2-2.

[0066] The regulating valve body 7-2 comprises a conical section positioned within the mounting cavity and a cylindrical section positioned within the vent 7-11. The outer diameter of the conical section matches the diameter of the vent and controls the opening and closing of the vent. An annular groove is defined on the outer wall of the conical section of the regulating valve body 7-2. A sealing ring 7-3 is mounted within the groove, sealing the regulating valve body 7-2 against the fixed valve body 7-1. The bottom end of the cylindrical section extends into the negative pressure zone, forming an annular gap between the cylindrical section and the fixed valve body. A rigid base 8 is threadedly connected to the bottom of the cylindrical section, and a gasket 8-1 is secured to the top surface of the rigid base 8. Within the annular gap, a second shock-absorbing elastic member 9 is positioned, mounted outside the cylindrical section. The second shock-absorbing elastic member 9 is a spring. Its top end is secured to the fixed valve body, and its bottom end is secured to the top of the gasket 8-1. In its natural state, the rigid base 8 is retracted within the annular gap.

[0067] The piston 5 is slidably mounted within the mounting cavity 2-4. The top end of the piston 5 is threadedly connected to the bottom end of the crutch body 1. A stud 4 is provided at its bottom end. The stud 4 is threadedly connected to the tapered section of the regulating valve body 7-2. The piston 5 has a first motion state and a second motion state. When in the first motion state, the piston 5 moves downward with the crutch body 1 and drives the regulating valve body 7-2 into the vent hole 7-11, thereby sealing the vent hole 7-11. When in the second motion state, the piston 5 moves upward with the crutch body 1 and drives the regulating valve body 7-2 out of the vent hole 7-11, thereby opening the vent hole 7-11.

[0068] The shock-absorbing elastic member 6 is a spring. The shock-absorbing elastic member 6 is located in the installation cavity 2-4 and below the piston 5. The two ends of the shock-absorbing elastic member 6 are connected to the piston 5 and the base 2 respectively.

[0069] In this embodiment, the crutch also includes a rigid stopper 10 and an inner spherical bearing 11. The rigid stopper 10 is annular and fits over the exterior of the fixed valve body 7-1. The bottom of the rigid stopper 10 is concave and has multiple radial grooves 10-1 formed therein. The inner spherical bearing 11 is mounted within the rigid stopper 10, with its inner ring connected to the fixed valve body 7-1 and its outer ring connected to the rigid stopper 10.

[0070] When using the shock-absorbing and fall-preventing crutch provided in this embodiment, the user grasps the top of the crutch body 1 and walks on a smooth surface such as a tiled or wooden floor. The suction cup 3 at the bottom of the crutch body 1 first touches the ground. The user then gradually applies downward pressure to the crutch, squeezing the suction cup 3 and displacing the air in the negative pressure zone. Simultaneously, the crutch body 1 is forced downward, driving the piston 5 downward. The shock-absorbing elastic member 1 6 begins to be squeezed and compressed, exerting a reaction force on the crutch body 1 to slow its downward movement. The regulating valve body 7-2 follows the piston 5 downward to close the vent 7-11. At this time, the shock-absorbing elastic member 2 9 is stretched, and the rigid base 8 touches the ground. This creates a certain negative pressure in the negative pressure zone, firmly adhering the suction cup 3 to the ground, preventing the crutch from moving horizontally. The user then lifts the crutch body 1, which drives the piston 5 upward. The shock-absorbing elastic member 1 gradually recovers, and the regulating valve body 7-2 follows the piston 5 upward, opening the vent 7-11. The rigid base also moves upward into the annular gap, moving downward to resist the formation of negative pressure, while the rigid block touches the ground for support. When the piston 5 moves to the vent 1-12 position, external air enters the mounting cavity 1-4 and enters the negative pressure zone through the vent 7-11 and the radial grooves on the lower surface of the rigid block 10, thereby balancing the air pressure. At this point, the suction cup 3 detaches from the ground, and the user pulls the crutch off the ground and walks forward.

[0071] During the walking process, when the suction cup 3 is attached to the ground, the crutch cannot move horizontally, thus preventing the crutch bottom from slipping and drifting, which could cause the user, especially the elderly, to fall. Simultaneously, when the crutch body 1 moves downward or upward, the shock-absorbing elastic member 1 6 and the shock-absorbing elastic member 2 9 are squeezed or stretched, exerting a reaction force on the crutch body 1, slowing down the speed of the crutch body 1, preventing sudden changes in speed, and reducing the force exerted on the user, especially the elderly, when the crutch lands or leaves the ground, thereby reducing the impact of this force on the user's bones, especially the elderly.

[0072] Example 2

[0073] This embodiment provides a shock-absorbing and anti-fall crutch, which is different from the embodiment 1 in that: Figure 6 In this embodiment, the crutch also includes a lampshade 12, an LED light strip (not shown), a power supply (not shown), a light-controlled switch (not shown), a photosensor (not shown), an infrared discharge sensor (not shown) and a single-chip microcomputer (not shown).

[0074] The lampshade 12 is fixedly sleeved on the bottom end of the crutch body 1 . The lampshade 12 is trumpet-shaped with its trumpet mouth facing the bottom of the crutch body 1 .

[0075] The LED light strip is installed in the lampshade 12. Reasonable selection and installation of the LED light strip can solve the problem of blind spots in the current smart crutch lighting, especially in rural areas where the roads are uneven and the streetlight system is imperfect or even non-existent. The LED light strip can better illuminate the road under the feet of the elderly, allowing them to better avoid danger, avoid falls, and walk more steadily.

[0076] A power supply is installed within the crutch body 1 and is used to power the LED light strip. The power supply can be a lithium battery. A cavity for installing the power supply can be provided within the crutch body 1, and a charging port for charging the power supply can be provided on the crutch body 1. The cavity can also be provided with a cover to facilitate replacement or maintenance of the power supply.

[0077] A light-controlled switch and a microcontroller are both mounted within the crutch body 1. The light-controlled switch controls the on / off connection between the power supply and the LED strip. The microcontroller is electrically connected to the power supply and utilizes an STM32 microcontroller. The STM32 microcontroller is designed for embedded applications requiring high performance, low cost, and low power consumption. Its stable operation and long operating life make it suitable for portable devices like crutches.

[0078] The light sensor is installed on the crutch body 1 and is electrically connected to the light control switch, power supply and single chip microcomputer. The light sensor detects the light intensity around the crutch body 1 and feeds back the light signal to the single chip microcomputer, which controls the opening and closing of the light control switch according to the light intensity.

[0079] The infrared release sensor is installed on the crutch body 1 and connected to the light-controlled switch, power supply, and microcontroller. The infrared release sensor detects whether there are pedestrians approaching the crutch body 1 and feeds back pedestrian signals to the microcontroller. The microcontroller controls the opening and closing of the light-controlled switch according to the pedestrian signals.

[0080] The shock-absorbing and anti-fall cane provided in this embodiment may also include a BDS positioning module (not shown) and a BDS button 13. The BDS positioning module is installed within the cane body 1 and is electrically connected to the power supply and the single-chip microcomputer. Beidou navigation mainly consists of three parts: the air segment, the ground segment, and the user segment. It can provide users with high-precision and reliable positioning, navigation, and other services worldwide, and can also achieve short message communication with a positioning accuracy of up to 10 meters, meeting the requirements of the use of smart elderly-assisting canes. The BDS positioning module uses existing Beidou navigation technology, which will not be described in detail here. The BDS button 13 is installed at the top of the cane body 1 and is used to control the connection between the power supply and the BDS positioning module. In this way, if the user falls, gets lost, or encounters other critical situations while using the cane, the user can directly press the BDS button 13, which will turn on the BDS positioning module and activate the cane. The BDS positioning module will then send the cane's location information to the guardian, making it easier for the guardian to find the user. BDS positioning mainly achieves accurate positioning of the user's location, making it easier for the guardian to find the user in a timely manner and implement rescue when the user faces an emergency.

[0081] Combine Figure 7 、 Figure 8 、 Figure 9 , the control principle of this embodiment is explained.

[0082] RG is a photoresistor (its resistance changes with light intensity). It serves as a photosensor to detect ambient light intensity. Together, RG and R form the transistor's bias circuit. As long as the values ​​of RG and R are appropriate, the transistor can operate in its linear amplification region. The transistor's collector current is related to the resistance of RG, and therefore the ambient light intensity. Figure 9 In the circuit, when ambient light is strong, the resistance of the photoresistor RG is small, reducing the base current of the transistor and its collector current. This automatically reduces the brightness of the LED strip. When the ambient light becomes weaker, the resistance of RG increases, increasing the base and collector currents of the transistor, and the brightness of the LED strip automatically increases. This allows the LED strip's brightness to automatically adjust as the ambient light changes.

[0083] In this embodiment, combined with Figure 10The LM393 voltage comparator is used for intelligent control. First, let's explain its operating principle: it has two inputs: one is the non-inverting input, denoted by "+," and the other is the inverting input, denoted by "-." When comparing two voltages, a fixed voltage (also called the threshold level, which can be selected at any point within the LM339's input common-mode range) is applied to one input, while the signal voltage to be compared is applied to the other. When the voltage at the "+" terminal is higher than the "-" terminal, the output transistor is cut off, effectively opening the output circuit. When the voltage at the "-" terminal is higher than the "+" terminal, the output transistor is saturated, effectively connecting the output to a low potential. Therefore, the LM393 also acts as a switch to a certain extent. The output of the LM339 is equivalent to a transistor without a collector resistor. Therefore, a resistor (called a pull-up resistor) is generally connected from the output to the positive power supply to control the current. This affects the high potential of the output terminal. If the voltage difference between the two input terminals of LM393 is greater than 10mV, it can ensure that the output can reliably switch from one state to another. Therefore, it is ideal to use LM339 in occasions such as weak signal detection. Here we use this advantage to carry out light-sensitive intelligent control. Figure 10 In the figure, the "+" input is connected to a sliding rheostat, fixing the potential at the threshold level. The "-" input is derived from the series branch of R and the photoresistor. When the light is bright, the resistance of the photoresistor GR is small, and the voltage divider is also small, resulting in a higher voltage at the "+" end than at the "-" end. The output tube is cut off, the output end is open, and the LED light does not light up. When the light is dim, the resistance of the photoresistor GR increases, and the voltage divider also increases. The potential of the "-" input increases. When the voltage at the "-" end is higher than the "+" end, the output tube is saturated, that is, the output end is connected to a low potential, the circuit is turned on, and the LED light turns on. By adjusting the resistance value of the resistor, the voltage divider of the sliding rheostat, and the photoresistor, we can achieve light-sensitive intelligent control of the LED.

[0084] In addition, pulse width modulation (PWM) dimming is also an idea and method. By modulating the width of a series of pulses, the required waveform is equivalently obtained, and the human eye's resolution makes people feel that the brightness of the lamp has changed. By controlling the ratio of high and low levels within a cycle through PWM, the luminous intensity of the LED is controlled, and the duty cycle is proportional to the brightness. Figure 11 This is a pulse width modulation circuit diagram. +E is the same as the comparison point mentioned above. The duty cycle of the corresponding output voltage can be changed by changing the two capacitors, thereby realizing intelligent control of the LED lamp.

[0085] Inspired by the smart lighting we use today, we incorporated an infrared pyroelectric sensor into our design. This sensor can detect infrared light emitted by humans or animals. This infrared-based automatic control device automatically outputs a high level when a person enters the sensing range, detecting changes in the infrared spectrum of the person's body. This high level continues until the person leaves the sensing range. After the person leaves, the switch automatically turns off the load after a delay (initially set at 30 seconds). The sensing distance can be adjusted by adjusting the time constant, serving as the primary control level for the smart LED. Furthermore, unlike younger people, the elderly are more prone to losing things. The infrared pyroelectric sensor and the BDS navigation and positioning system can also help them find their crutches. When no one is around, the delay saves energy. Once the BDS navigation and positioning system locates the crutches, the infrared pyroelectric sensor reactivates, facilitating easy retrieval and assisting others in finding them.

[0086] The main circuit for intelligent LED control utilizes basic components such as a photoresistor, a light-emitting diode, a sliding rheostat, and an LM393 voltage comparator. (1) Detecting human body signals through an infrared pyroelectric sensor is the first-level control. (2) The photoresistor detects the intensity of ambient light, which is then compared through a comparator circuit and outputs a signal to the microcontroller. (3) When it detects that the light is dark at night and a human body signal is detected, the microcontroller controls the LED light strip through the light control circuit.

[0087] The selection of a reasonable control system in this embodiment can not only achieve the effect of energy saving, but also the appropriate lighting control system can make it easier for the elderly to find their crutches in a dark environment based on the brightness of the LEDs.

[0088] Example 3

[0089] This embodiment provides a shock-absorbing and anti-fall crutch, which is different from the embodiment 1 in that: Figure 12-14 In this embodiment, the crutch body 1 includes a telescopic outer rod 1-1, a telescopic inner rod 1-2 and a grip handle 1-3.

[0090] The telescopic outer rod 1-1 defines a sliding cavity extending from its bottom surface toward its interior. The telescopic outer rod 1-1 defines a locking hole 1-11 communicating with the sliding cavity and multiple locking holes 1-12 located below the locking hole 1-11. The locking hole 1-11 and the multiple locking holes 1-12 are arranged in a straight line. A support frame 1-13 is fixed to the outer wall of the telescopic outer rod 1-1. Multiple screws 1-14 are threadedly connected to the support frame 1-13. The multiple screws 1-14 are respectively arranged in a one-to-one correspondence with the multiple locking holes 1-12. Each screw 1-14 is provided with an abutment block 1-15 that can extend into the corresponding locking hole 1-12.

[0091] The bottom end of the telescopic inner rod 1-2 extends into the mounting cavity 1-4 and is connected to the piston 5. The top end of the telescopic inner rod 1-2 is slidably mounted within the sliding cavity. A connector 1-21 is fixed to the top end of the telescopic inner rod 1-2 and slidably engages with the sliding cavity. A return spring 1-23 connected to the connector 1-21 is disposed within the sliding cavity. The connector 1-21 is provided with a spring clip 1-22 that can be snapped into the locking hole 1-11 or the locking hole 1-12.

[0092] The gripping handle 1-3 is installed at the top of the telescopic outer rod 1-1 and adopts an ergonomic simulated handle. The gripping handle 1-3 is designed to be an arc structure, which is convenient for the user to grasp with the palm.

[0093] The shock-absorbing and anti-fall crutch proposed in this embodiment only needs to press the spring buckle 1-22 to disengage it from the locking hole 1-12 and enter the sliding cavity when it needs to be retracted. Press downward from the top of the crutch to make the connecting head 1-21 slide upward until the spring buckle 1-22 fits with the top lock hole 1-11 and pops out. The crutch is then folded and fixed, and the operation is convenient. When it needs to be unfolded, the spring clip 1-22 is clamped inside the lock hole 1-11 exposed at the top of the telescopic outer rod 1-1, and multiple groups of abutment blocks 1-15 are vertically arranged on the support frame 1-13. The function of the abutment block 1-15 is to close the remaining clamping holes 1-12, and the corresponding arbitrary screw rod 1-14 on the support frame 1-13 is threadedly rotated so that the abutment block 1-15 can be moved out from the inside of the corresponding clamping hole 1-12. Then, when the spring clip 1-22 is retracted from the top lock hole 1-11, the compressed return spring 1-23 pops out quickly, causing the connecting head 1-21 to slide down quickly along the outer wall of the telescopic outer rod 1-1 until the spring clip 1-22 is flush with the clamping hole 1-12 of the removed abutment block 1-15 and pops out, and the telescopic inner rod 1-2 is fixed. At the same time, through the cooperation between the support frame 1-13 and the abutment block 1-15, the distance that the telescopic inner rod 1-2 will be extended can be preset, so that the extended position of the telescopic inner rod 1-2 is limited.

[0094] The shock-absorbing and anti-fall crutch proposed in this embodiment has a telescopic outer rod 1-1 and a telescopic inner rod 1-2 that are telescopically connected. The outer rod 1-1 and the inner rod 1-2 are extended when needed and retracted when not needed, thus reducing space usage and allowing the crutch to be stored retractably when traveling in a vehicle or other means of transportation. The telescopic outer rod 1-1 and the inner rod 1-2 are telescopically connected, enabling the crutch to be adjusted in length to meet the needs of different people and different scenarios, and the crutch is easy to extend and operate.

[0095] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0096] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0097] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A shock-absorbing and anti-fall crutch, which is used to assist a user in walking, the crutch comprising a crutch body; characterized in that: The crutch also includes: The base is provided with a mounting cavity and a vent communicated with the mounting cavity; the bottom end of the crutch body extends into the mounting cavity and the crutch body and the base are slidably engaged; A suction cup is mounted on the bottom of the base to form a negative pressure zone between the suction cup and the bottom of the base; a vent hole is provided at the bottom of the base to connect the mounting cavity and the negative pressure zone; a regulating valve body, which is located in the vent hole and controls the opening or closing of the vent hole; The piston is slidably mounted in the mounting cavity, the top end of the piston is detachably connected to the bottom end of the crutch body and the bottom end is connected to the top end of the regulating valve body, and the piston has a first motion state and a second motion state; when the piston is in the first motion state, the piston moves downward with the crutch body and drives the regulating valve body to close the vent; when the piston is in the second motion state, the piston moves upward with the crutch body and drives the regulating valve body to open the vent; A first shock-absorbing elastic member is located in the mounting cavity and below the piston, with two ends of the first shock-absorbing elastic member being connected to the piston and the base respectively; The bottom of the base is provided with a mounting hole connecting the mounting cavity and the negative pressure zone, the mounting hole is threadedly connected with a fixed valve body, the bottom of the fixed valve body extends into the negative pressure zone and a plurality of vent holes are formed through the fixed valve body; The regulating valve body comprises a conical section and a cylindrical section. The conical section is threaded with the piston and the outer diameter of the conical section matches the diameter of the vent hole. The bottom of the cylindrical section extends into the negative pressure area and is connected to a rigid base. A gap is left between the cylindrical section and the fixed valve body, and a second shock-absorbing elastic member is provided in the gap and is sleeved on the outside of the cylindrical section. The top end of the second shock-absorbing elastic member is fixed to the fixed valve body and the bottom end is fixed to the top end of the rigid base. In a natural state, the rigid base is accommodated in the gap. The crutch also includes a rigid stopper and an inner joint bearing; the rigid stopper is annular in structure and is mounted on the outside of the fixed valve body, and the bottom of the rigid stopper is concave to form multiple radial grooves; the inner joint bearing is installed in the rigid stopper, and the inner ring of the inner joint bearing is connected to the outer valve body and its outer ring is connected to the rigid stopper.

2. The shock-absorbing and anti-fall crutch according to claim 1, characterized in that: An annular groove is provided on the outer wall of the tapered section of the regulating valve body, and a sealing ring is installed in the annular groove to achieve sealing between the regulating valve body and the fixed valve body.

3. The shock-absorbing and anti-fall crutch according to claim 1, characterized in that: The base comprises: The seat body is cylindrical and has a groove formed inwardly at its top. A vent communicating with the groove is provided on the side of the seat body, and a mounting hole communicating with the mounting cavity and the negative pressure zone is provided at the bottom of the seat body. The end cover is detachably connected to the top of the base body to form the installation cavity between the end cover and the base body, and a mounting opening is opened through the end cover; the bottom end of the crutch body passes through the mounting opening and extends into the installation cavity to be connected with the piston thread, and the crutch body and the end cover are clearance-matched.

4. The shock-absorbing and anti-fall crutch according to claim 1, characterized in that: The crutch also includes: a lampshade fixedly sleeved on the bottom end of the crutch body; An LED light strip installed in the lampshade; a power supply installed in the crutch body and used to power the LED light strip; A light-controlled switch, which is installed in the crutch body and is used to control the on / off between the power supply and the LED light strip; A single chip microcomputer is installed in the crutch body and is electrically connected to the light-controlled switch; and / or, a light sensor mounted on the crutch body and electrically connected to a power supply and a single-chip microcomputer, the light sensor detecting light intensity and feeding back a light signal to the single-chip microcomputer, which controls the opening and closing of the light-controlled switch according to the light signal; And / or, an infrared discharge sensor is installed on the crutch body and electrically connected to the power supply and the single-chip microcomputer. The infrared discharge sensor detects whether there are pedestrians approaching the crutch body and feeds back pedestrian signals to the single-chip microcomputer. The single-chip microcomputer controls the opening and closing of the light-controlled switch according to the pedestrian signals.

5. The shock-absorbing and anti-fall crutch according to claim 4, characterized in that: The crutch body also includes: A BDS positioning module is installed in the crutch body and is electrically connected to the power supply and the single chip microcomputer; and The BDS button is installed at the top of the crutch body and is used to control the connection and disconnection between the power supply and the BDS positioning module.

6. The shock-absorbing and anti-fall crutch according to claim 1, characterized in that: The crutch body comprises: a telescopic outer rod having a sliding cavity extending from its bottom surface to its interior; The telescopic inner rod has a bottom end extending into the mounting cavity and connected to the piston, and a top end of the telescopic inner rod is slidably arranged in the sliding cavity. The length of the telescopic inner rod in the sliding cavity is adjustable and the telescopic inner rod can be fixedly connected to the telescopic outer rod; A gripping handle is mounted on the top of the telescopic outer rod.

7. The shock-absorbing and fall-preventing crutch according to claim 6, characterized in that: The telescopic outer rod is provided with a lock hole communicating with the sliding cavity and a plurality of latch holes located below the lock hole, wherein the lock hole and the plurality of latch holes are distributed in a straight line; A connector is fixed to the top of the telescopic inner rod and the connector is slidably matched with the sliding cavity. A return spring connected to the connector is provided in the sliding cavity, and a spring buckle that can be clamped into a lock hole or a clamping hole is provided on the connector.

8. The shock-absorbing and fall-preventing crutch according to claim 7, characterized in that: A support frame is fixed to the outer wall of the telescopic outer rod, and a plurality of screw rods are threadedly connected to the support frame. The plurality of screw rods are respectively arranged in one-to-one correspondence with the plurality of clamping holes, and abutment blocks are arranged on the screw rods that can extend into the corresponding clamping holes.

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