A device to assist the elderly to go up and down stairs

Abstract

The present invention discloses a device for assisting the elderly to go up and down stairs, comprising a walking stick, one end of which is connected to a positioning mechanism, two ends of the positioning mechanism are respectively provided with a housing A and a housing B, an active clamping block is provided on the housing A, and a passive clamping block is provided on the housing B. The present invention solves the problems of high cost and large space occupation of the existing devices for going up and down stairs.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment and relates to a device for assisting elderly people to go up and down stairs. Background Art

[0002] As China gradually enters an aging era, the phenomenon of elderly people living alone has become more prominent. The difficulty and safety of going up and down stairs outdoors and indoors for the elderly has become one of the most difficult problems to solve in daily life.

[0003] At present, the stair climbing assistance devices sold on the market can be divided into two types: manual and electric.

[0004] A manual device for assisting stair climbing, the power for going up and down the stairs still comes from the person himself. The device plays a protective and leveraging role to prevent the user from tipping over or falling backwards, and to assist in climbing the stairs. Patent CN1106041278A, named a multifunctional crutch for assisting in climbing stairs, uses a rotating handle to rotate the clamping blocks to move closer to each other, thereby clamping the railing, and uses a ratchet locking mechanism to prevent the device from loosening after clamping. However, it is still some distance away for practical use. The use of intermittent mechanisms such as ratchets for locking can only achieve intermittent size clamping, and cannot achieve reliable clamping of cylindrical railings in life, nor can it limit the rotation of the device around the axis on the surface of the railing; the device requires additional manual operation from clamping to loosening, that is, the two steps of clamping and unlocking need to be repeated for each step, which is cumbersome to use.

[0005] The electric stair climbing assist device is driven by a motor to move upward along the stair railing without manpower. Patent CN200920152734.6 provides an electric stair climbing assist device, which is installed on the stair railing, uses a motor as a power source, drives the winch to rotate and pull the stair climbing winch, so that it moves along the stair railing, and controls the motor to work through an electronic unit, so as to realize the stair climbing and obstacle avoidance functions. This device cannot be disassembled, and the stair railing must also be matched with the device. Its installation and use costs are high, maintenance is difficult, and it occupies the stair railing, so it cannot be rolled out and used in general residential buildings; Patent CN2014110405676.9 provides an electric stair climbing assist device, which is independent of the stair railing, uses a wheelchair as a carrier to assist in climbing, and realizes the alternating climbing function through a motor, a worm gear mechanism, and a climbing mechanism. Although this solution can realize the function of climbing stairs, the worm gear drives the worm, resulting in low transmission efficiency and high cost. The device is bulky and has certain requirements on the strength of the stairs, which affects its safety. Generally speaking, electric stair climbing seats have high construction costs, are difficult to maintain, and occupy stair space, so they cannot be used in residential buildings and other occasions.

[0006] The existing assistance for elderly people to solve the problem of stairs mainly focuses on the problem of climbing stairs, and the problem of slipping and tipping forward when elderly people go down stairs needs to be solved urgently. The existing device has high cost and is not suitable for consumption by the elderly group. Summary of the invention

[0007] The purpose of the present invention is to provide a device for assisting the elderly to go up and down stairs, which solves the problems of high cost and large space occupied by the existing devices for going up and down stairs.

[0008] The technical solution adopted by the present invention is a device for assisting the elderly to go up and down stairs, comprising a walking stick, one end of which is connected to a positioning mechanism, the two ends of the positioning mechanism are respectively provided with a casing A and a casing B, an active clamping block is provided on the casing A, and a passive clamping block is provided on the casing B.

[0009] The present invention is also characterized in that:

[0010] The walking stick comprises a walking stick body, which comprises a telescopic rod inner rod, a telescopic rod outer rod coaxially sleeved outside the telescopic rod inner rod, and a handrail is arranged on the upper side of the telescopic rod outer rod; one end of the telescopic rod outer rod is equipped with two rollers through a roller mounting frame, and the rollers are in contact with an active clamping block; one end of the telescopic rod inner rod extends into the telescopic rod inner rod, and one end of the telescopic rod inner rod extends into the telescopic rod outer rod, and the other end of the telescopic rod inner rod is provided with a grip, and the telescopic rod inner rod and the telescopic rod outer rod are positioned by pins; the telescopic rod outer rod is installed on the casing A through a walking stick connecting mechanism.

[0011] The walking stick connection mechanism includes an L-shaped fixing bracket, which is installed on the housing A through a fixing plate. The telescopic rod outer rod is installed between the two L-shaped fixing brackets through a rotating shaft. The walking stick body can rotate around the rotating shaft. The reversing pin passes through the L-shaped fixing bracket and the telescopic rod outer rod located at the upper part of the telescopic rod outer rod, and is inserted into the hole of the L-shaped fixing bracket located at the lower part of the telescopic rod outer rod. The square boss on the reversing pin is against the roller mounting frame through a spring. The square boss on the reversing pin cooperates with the square hole on the L-shaped fixing bracket located at the upper part of the telescopic rod outer rod to limit the rotation of the reversing pin, and the bottom of the reversing pin is an inclined surface.

[0012] The housing A includes a back plate arranged in a vertical direction, a guide rod connector is connected to the upper inner side of the back plate, right angle brackets are respectively arranged at opposite ends of the inner side of the back plate, and auxiliary guide mechanisms are respectively installed on the two right angle brackets.

[0013] The auxiliary guide mechanism comprises a guide bolt fixed on the right-angle bracket, and a return spring is coaxially sleeved on the guide bolt.

[0014] The positioning mechanism includes two guide rods arranged in parallel, and the two guide rods are equipped with positioning elements. The housing B, the passive clamp block, and the housing A are synchronously inserted into the two guide rods from left to right in sequence. The passive clamp block and the housing B are fixed at one end of the guide rod, and the active clamp block can slide along the guide rod with the housing A.

[0015] The casing B comprises a shell, a switch is mounted on the upper surface of the shell, and an adjustment block is arranged at the inner upper end of the shell.

[0016] The positioning element includes a base plate, both ends of which are respectively inserted into two guide rods, and one end of the base plate is fixed on the adjustment block. Spring pins are evenly distributed on the upper end of the base plate, and a pressure plate is provided on the spring pins in the horizontal direction. The pressure plate is connected to the switch through a steel wire rope, and a locking plate is provided above the pressure plate, which is connected to the upper surface of the guide rod connector.

[0017] The active clamp has the same structure as the passive clamp;

[0018] The structure of the active clamp is as follows: it includes a V-shaped main load-bearing plate and a V-shaped main support plate which are arranged opposite to each other, two sets of track mechanisms are arranged between the main load-bearing plate and the main support plate, the upper and lower sides of the main load-bearing plate and the main support plate are respectively provided with openings, and the positions of the openings on the main load-bearing plate and the main support plate correspond, the two sets of track mechanisms are respectively embedded in the upper and lower openings of the main load-bearing plate and the main support plate, and the main support plate is connected to the axle frame through a spring plunger.

[0019] Each set of crawler mechanisms includes two synchronous wheels, which are connected by a synchronous belt. The centers of the two synchronous wheels are coaxially sleeved with wheel axles, and the two ends of the wheel axles are respectively installed on the upper and lower sides of the axle frame, and the axle frame is connected to the main support plate through a spring plunger.

[0020] The beneficial effects of the present invention are that the device provided by the present invention assists the elderly in going up and down stairs, adopts a mechanical structure, does not require electricity, has a low failure rate and a low cost; the present invention is applicable to stair railings with a circular cross-section of 50-80 mm, does not require supporting facilities, can switch the left or right stair railing mode, and is widely used in residential buildings, nursing homes and the like; the present invention can be used as a crutch at ordinary times, is convenient to carry, and has simple mode switching; the present invention is easy to use and operate, and the process is coherent, and is suitable for use by the elderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a device for assisting the elderly to go up and down stairs according to the present invention;

[0022] Figure 2 It is an exploded view of a walking stick part of a device for assisting elderly people to go up and down stairs according to the present invention;

[0023] Figure 3 This is a schematic diagram of a cane connection mechanism of a device for assisting elderly people to go up and down stairs according to the present invention;

[0024] Figure 4 It is a schematic diagram of a pre-clamping mechanism of a device for assisting elderly people to go up and down stairs according to the present invention;

[0025] Figure 5 It is a schematic diagram of a positioning mechanism of a device for assisting elderly people to go up and down stairs according to the present invention;

[0026] Figure 6 This is a schematic diagram of the disassembly of a positioning mechanism of a device for assisting elderly people to go up and down stairs according to the present invention;

[0027] Figure 7 It is a structural schematic diagram of a locking plate in a device for assisting elderly people to go up and down stairs according to the present invention;

[0028] Figure 8 It is a structural schematic diagram of a bottom plate in a device for assisting elderly people to go up and down stairs according to the present invention;

[0029] Fig. 9 This is an exploded view of an active clamping block of a device for assisting elderly people to go up and down stairs according to the present invention;

[0030] Fig.10 This is a schematic diagram of a crawler mechanism of a device for assisting elderly people to go up and down stairs according to the present invention;

[0031] Fig.11 It is a schematic diagram of the complete clamping action of a device for assisting the elderly to go up and down stairs according to the present invention;

[0032] Fig.12 The present invention is a schematic diagram of a device for assisting elderly people to go up and down stairs used as a walking stick.

[0033] In the figure, 1. walking stick, 11. walking stick body, 111. inner rod of telescopic rod, 112. outer rod of telescopic rod;

[0034] 114. armrest, 115. grip, 116. roller, 117. roller mounting frame;

[0035] 12. Cane connecting mechanism, 121. Rotating shaft, 122. Reversing pin, 123. L-shaped fixing bracket, 124. Fixing plate, 125. Spring, 126. Square boss;

[0036] 2. Casing A, 21. Back plate, 22. Right angle bracket; 23. Auxiliary guide mechanism, 231. Guide bolt, 232. Return spring; 24. Guide rod connector;

[0037] 3. Casing B, 31. Housing, 32. Switch, 33. Adjustment block;

[0038] 4. Positioning mechanism, 41. Positioning element, 411. Locking plate, 412. Bottom plate, 413. Spring pin, 414. Pressure plate, 415. Cover plate; 42. Guide rod,

[0039] 5. Active clamping block, 51. Main bearing plate, 52. Main supporting plate;

[0040] 53. Track mechanism, 531. Shaft frame, 532. Spring plunger, 533. Synchronous wheel, 534. Wheel axle, 535. Synchronous belt, 536. U-shaped groove;

[0041] 6. Passive clamp, 7. Range extender bracket. DETAILED DESCRIPTION

[0042] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The present invention provides a device for assisting the elderly to go up and down stairs, such as Figure 1 As shown, it includes a positioning mechanism 4, a housing B3, a housing A2, a walking stick 1, an active clamping block 5 and a passive clamping block 6. The positioning mechanism 4 includes a guide rod 42 and a positioning element 41, and the positioning element 41 is installed between two guide rods 42.

[0044] The casing B3 is fixed to the left end of the guide rod 42 by the adjustment block 33, and the casing A2 is installed on the right side of the positioning element 41 and can slide along the guide rod 42. Combined with the positioning mechanism 4, the pre-clamping railing can be realized. The passive clamp 6 is fixed on the inner side of the casing B3, and the active clamp 5 is installed on the guide rod 42 and is connected to the casing A2 by the reset spring 232. That is, the active clamp 5 can slide along the guide rod 42 with the casing A2, and can also move relative to the casing A2.

[0045] The walking stick 1 is installed on the outside of the housing A2 and can rotate unidirectionally at a small angle around the rotating shaft 121. A roller 116 is installed at one end of the walking stick 1. When the walking stick 1 rotates forward, the roller 116 pushes the active clamping block 5 to move relative to the housing A2 along the guide rod 42 to achieve complete clamping of the railing.

[0046] Figure 2It is an exploded view of the walking stick 1. The walking stick 1 includes: a walking stick body 11 and a walking stick connecting mechanism 12. The walking stick body 11 includes a telescopic rod inner rod 111, a telescopic rod outer rod 112, an armrest 114, a grip 115, a roller 116, and a roller mounting frame 117. The armrest 114 is mounted on the outer surface of the telescopic rod outer rod 112, and the roller 116 is mounted on the left end of the telescopic rod outer rod 112 through the roller mounting frame 117. The grip 115 is fixed to the right end of the telescopic rod inner rod 111, and the telescopic rod inner rod 111 is coaxially sleeved inside the telescopic rod outer rod 112. The outer surface of the telescopic rod outer rod 112 is provided with a row of pin holes in sequence along the length direction of the telescopic rod outer rod 112. The pin holes are threaded holes. The pins pass through the pin holes and press against the outer wall of the telescopic rod inner rod 111 to fix the telescopic rod outer rod 112 and the telescopic rod inner rod 111. When the length of the walking stick 1 needs to be adjusted, the pin is released, and then the telescopic rod inner rod 111 is moved, and then the telescopic rod inner rod 111 and the telescopic rod outer rod 112 are fixed with the pin.

[0047] The telescopic rod outer rod 112 is mounted on the housing A2 through the cane connecting mechanism 12. Figure 3 As shown, the walking stick connecting mechanism 12 includes: a rotating shaft 121, a reversing pin 122, an L-shaped fixing bracket 123, a fixing plate 124, and a spring 125.

[0048] The L-shaped fixing bracket 123 is mounted on the housing A2 through the fixing plate 124, and the telescopic rod outer rod 112 is mounted between the two L-shaped fixing brackets 123 through the rotating shaft 121, and the walking stick body 11 can rotate around the rotating shaft 121. The bottom of the reversing pin 122 is an inclined surface, and the reversing pin 122 passes through the L-shaped fixing bracket 123 and the telescopic rod outer rod 112 located at the upper part of the telescopic rod outer rod 112, and is inserted into the hole of the L-shaped fixing bracket 123 located at the lower part of the telescopic rod outer rod 112. The square boss 126 on the reversing pin 122 is abutted against the roller mounting frame 117 through the spring 125, and the square boss 126 on the reversing pin 122 cooperates with the square hole on the L-shaped fixing bracket 123 located at the upper part of the telescopic rod outer rod 112 to limit the rotation of the reversing pin 122.

[0049] Since the bottom of the reversing pin 122 is an inclined surface, the cane body 11 is limited to rotate in one direction around the rotation axis 121. When the cane body 11 rotates in the forward direction around the rotation axis 121, the reversing pin 122 is lifted by the inclined surface, while if it rotates in the reverse direction, it is restricted. When the stair railing is on the other side of the user, the reversing pin 122 can be pulled out, rotated 180 degrees, and then inserted again, and the forward rotation direction of the cane body 11 around the rotation axis 121 can be changed.

[0050] Figure 4The exploded view of the pre-clamping mechanism (housing B3, housing A2, positioning mechanism 4). The cane 1 is installed on the outside of the housing A2, and the housing B3 includes: a housing 31, a switch 32, and an adjustment block 33. The switch 32 is installed on the upper surface of the housing 31, and the adjustment block 33 is fixed to the inner upper end of the housing 31.

[0051] The housing A2 includes: a back plate 21, a right angle bracket 22, an auxiliary guide mechanism 23 and a guide rod connector 24. The guide rod connector 24 is installed on the upper inner side of the back plate 21, and two right angle brackets 22 are installed on the left and right sides of the inner side of the back plate 21. The L-shaped fixing bracket 123 is installed on the back plate 21 through the fixing plate 124;

[0052] The auxiliary guide mechanism 23 is installed on the two right-angle brackets 22 . The auxiliary guide mechanism 23 includes a guide bolt 231 and a return spring 232 . The return spring 232 is sleeved on the guide bolt 231 .

[0053] like Figure 5 As shown, the positioning mechanism 4 includes a guide rod 42 and a positioning element 41, and the housing B3, the passive clamp 6, the positioning element 41, the active clamp 5 and the housing A2 are sequentially passed through the guide rod 42 from left to right, wherein the housing B3 is fixed to the left end of the guide rod 42, the passive clamp 6 is fixed to the inner side of the housing B3, and the active clamp 5 can slide along the guide rod 42 along with the housing A2, and can also move relative to the housing A2 through the reset spring 232.

[0054] like Figure 6 As shown, the positioning element 41 includes a locking plate 411, a bottom plate 412, a spring pin 413, a pressure plate 414, and a cover plate 415. The bottom plate 412 is fixed to the right side of the adjustment block 33, and a guide hole for the spring pin 413 is provided on the bottom plate 412. The pressure plate 414 is located on the upper surface of the flange of the spring pin 413. The switch 32 is connected to the pressure plate 414 through a steel wire rope to control its up and down movement, release and compress the spring pin 413. The locking plate 411 is installed on the upper surface of the guide rod connector 24, and slides with the random shell A2. There is a spring pin insertion hole on the locking plate 411.

[0055] like Figure 7 As shown, the spring pin insertion holes on the locking plate 411 are arranged at equal intervals B, and the number of spring pins 413 is 2N. Figure 8 As shown, the spring pin guide holes on the bottom plate 412 are arranged at equal intervals L, and the design accuracy is set to A. If A=L / N=LB, then in the minimum sliding interval A, there are always at least 2 spring pins 413 inserted into the locking plate 411, thereby achieving relative fixation of the position of the casing A2.

[0056] The housing A2 slides along the guide rod 42 toward the housing B3, the switch 32 is pressed, the steel wire pulls the pressure plate 414 downward, the spring pin 413 is pressed down, and the locking plate 411 can slide unhindered along the guide rod 42. When the size is closed to be slightly larger than the diameter of the stair railing, the switch 32 is released, the pressure plate 414 pops up under the action of the spring pin 413, and a group of spring pins 413 are inserted into the holes of the locking plate 411, limiting the movement of the housing B3 and the housing A2, and realizing pre-clamping. When the restriction needs to be released, the switch 32 is pressed, and the pressure plate 414 can press the spring pin 413 inserted in the through hole again, and the housing A2 resumes moving.

[0057] Assuming that the number of spring pins 413 is 16, the spring pin guide hole pitch L is 8 mm, the spring pin insertion hole pitch B is 7 mm, and the design accuracy is 1 mm, satisfying 1=8 / 8=8-7, there are always at least 2 spring pins 413 inserted into the locking plate 411 within the minimum sliding interval of 1 mm, thereby achieving relative fixation of the position of the housing A2.

[0058] Fig. 9 It is an exploded view of the active clamp 5. The active clamp 5 is located on the inner side of the casing A2 and can slide along the guide rod 42 along with the casing A2. The active clamp 5 includes: a main bearing plate 51, a main support plate 52, a track mechanism 53, and a range extender bracket 7 installed in the middle of the outer side of the main support plate 52. The range extender bracket 7 is a V-shaped structure, and the two rollers 116 respectively conflict with the two inclined surfaces of the V-shaped range extender bracket 7. The passive clamp 6 is fixed to the casing B3 by the adjustment block 33, and its structural composition is the same as that of the active clamp 5. The track mechanism 53 is located between the main bearing plate 51 and the main support plate 52, and is installed on the V-shaped surface of the main bearing plate.

[0059] like Fig.10 As shown, the crawler mechanism 53 is composed of a synchronous wheel 533, a synchronous belt 535, a wheel shaft 534, a spring plunger 532 and a shaft frame 531, and there are two groups in total. The shaft frame 531 is provided with two U-shaped grooves 536 arranged opposite to each other up and down, and the synchronous belt 535 is wound around the two synchronous wheels 533. The cross-sections of the two ends of the wheel shaft 534 are rectangular, and the two ends of the two wheel shafts 534 are respectively installed on the upper and lower sides of the two U-shaped grooves 536 of the shaft frame 531, and the main support plate 52 is fixed to the shaft frame 531 through the threads on the spring plunger 532. The top of the spring plunger 532 is against the surface of the wheel shaft 534, and the synchronous wheel 533 is installed on the wheel shaft 534, protruding 3mm from the inner surface of the main bearing plate 51.

[0060] During pre-clamping, the switch 32 is pressed, and as the hand exerts force on the housing A2, the housing A2 slides toward the housing B3, and the synchronous wheel 533 on the main bearing plate 51 first contacts the stair railing, and the synchronous wheel 533 is compressed and deflected toward the inner surface of the main bearing plate 52 to adapt to the diameter of the stair railing, and the spring plunger 532 is compressed until the wheel shaft 534 deflects to the synchronous wheel 533 and the stair railing are completely in contact, and the switch 32 is released, and the positioning mechanism 4 automatically locks the housing A2. At this time, the synchronous wheel 533 has not completely retreated below the inner surface of the main bearing plate 51, that is, the inner surface of the main bearing plate 51 does not contact the stair railing, but due to the radial pressure generated by the spring plunger 532 and the circumferential friction force generated by the synchronous belt 535, the device is stationary on the stair railing.

[0061] Fig.11 Schematic diagram of the mechanism for achieving complete clamping action. The guide bolt 231 passes through the main support plate 52 and is fixed on the right-angle bracket 22. The reset spring 232 is located between the guide bolt 231 and the main support plate 52 and is in a compressed state. The roller 116 is in tight contact with the range-extending bracket 7. The cane 1 rotates 10° in the positive direction around the rotating shaft 121. Under the action of the inclined surface of the range-extending bracket 7, the roller 116 pushes the active clamp 5 along the guide rod 42 to approach the stair railing, and cooperates with the passive clamp 6 to clamp the stair railing. At this time, the synchronous wheel 533 is completely retracted into the inner surface of the main bearing plate 51. The main bearing plate 51 directly contacts the stair railing under the action of the thrust. Since there is a silicone pad on the contact surface, the contact surface generates a large friction force, thereby locking the railing. When the cane 1 reverses, the reset spring 232 pushes the active clamp 5 back along the guide bolt 231 and the guide rod 42.

[0062] Fig.12 The schematic diagram of the device being used as a crutch is shown in FIG. 1. Press the switch 32, close the housing A2 with both hands until the main bearing plate 51 contacts the right surface of the bottom plate 412, release the switch 32, and the positioning mechanism 4 locks the housing A2. Adjust the inner rod 121 of the telescopic rod to a suitable size and the device can be used as a crutch.

[0063] The present invention provides a method for using a device for assisting the elderly to go up and down stairs. During the process of going up stairs, if the stair railing is located on the left side, the device plays an assisting and protective role when the user is using the device to go up stairs. When going up stairs, the device is put on the stair railing, the switch 32 is pressed, the housing B3 and the housing A2 are closed, the switch 32 is released, and the positioning mechanism locks the relative position of the housing B3 and the housing A2. At this time, the device has been placed. When the user goes up stairs normally, both hands naturally pull the cane 1 backward, and the cane 1 rotates. Due to the effect of the bottom inclined surface of the reversing pin 122, the reversing pin 122 slides into the L-shaped fixed bracket 123, and the roller 116 pushes the active clamping block 5 to approach the railing. At this time, the active clamping block 5 and the passive clamping block 6 simultaneously hold the stair railing tightly, generating a clamping force, and the greater the force applied by the user to the cane 1, the greater the clamping force generated. The silicone pad on the main bearing plate 51 increases the friction force, so that the device is held tightly on the stair railing, and the user can go up a step by the reaction force provided by the cane. When the cane 1 rotates in the opposite direction, the reversing pin 122 is reinserted into the L-shaped fixing bracket 123 under the action of the spring, and the cane 1 cannot continue to rotate after it turns to the original position. The device rolls upward along the stair railing under the action of the synchronous wheel 533 and the synchronous belt 535; if the user loses balance, the body will fall backward due to gravity, and both hands will hold the cane 1 and pull backward. The reaction force generated by the device can be used to balance the body and prevent falling. When the device needs to be removed, the switch 32 is pressed, and the pressure plate 414 presses the spring pin 413 to withdraw from the locking plate 411, and the housing A2 can be separated.

[0064] During the process of going upstairs, if the stair railing is on the right side, the reversing pin 122 is pulled out and rotated 180° and put back to change the forward rotation direction. At this time, the method of going upstairs is the same as the above method.

[0065] During the process of going downstairs, if the stair railing is on the right side, put the device on the stair railing, and the placement action is the same as the above method. During the normal process of going downstairs, grab the external handrail 114 with both hands, hold both hands flat and push forward to make the cane 1 slide the device downward. When the body falls forward, both hands will naturally grab the external handrail 114 and push forward, the cane 1 rotates forward, and the active clamp 5 and the passive clamp 6 simultaneously hold the stair railing tightly, generating a large clamping force. The surface friction material increases the friction force, so that the device is fixed on the stair railing to prevent the user from leaning forward and causing danger. Pull back the cane 1, the active clamp 5 returns to its position, and the clamping force is eliminated. At this time, the device can continue to slide downward.

[0066] During the process of going downstairs, if the stair railing is on the right side, just adjust the direction of the reversing pin 122.

Claims

1. A device for assisting the elderly to go up and down stairs, characterized in that: The invention comprises a walking stick, one end of which is connected to a positioning mechanism, two ends of which are respectively provided with a housing A and a housing B, an active clamping block is provided on the housing A, and a passive clamping block is provided on the housing B; The walking stick comprises a walking stick body, the walking stick body comprises a telescopic rod inner rod, a telescopic rod outer rod is coaxially sleeved outside the telescopic rod inner rod, and a handrail is arranged on the upper side of the telescopic rod outer rod; one end of the telescopic rod outer rod is equipped with two rollers through a roller mounting frame, and the rollers are in contact with an active clamping block; one end of the telescopic rod inner rod extends into the telescopic rod inner rod, and one end of the telescopic rod inner rod extends into the telescopic rod outer rod, and the other end of the telescopic rod inner rod is provided with a grip, and the telescopic rod inner rod and the telescopic rod outer rod are positioned by a pin; the telescopic rod outer rod is installed on the housing A through a walking stick connecting mechanism; The walking stick connection mechanism comprises an L-shaped fixing bracket, which is mounted on the housing A through a fixing plate, and the telescopic rod outer rod is mounted between the two L-shaped fixing brackets through a rotating shaft, and the walking stick body can rotate around the rotating shaft, and the reversing pin passes through the L-shaped fixing bracket and the telescopic rod outer rod located at the upper part of the telescopic rod outer rod, and is inserted into the hole of the L-shaped fixing bracket located at the lower part of the telescopic rod outer rod, and the square boss on the reversing pin is abutted against the roller mounting frame through a spring, and the square boss on the reversing pin cooperates with the square hole on the L-shaped fixing bracket located at the upper part of the telescopic rod outer rod to limit the rotation of the reversing pin, and the bottom of the reversing pin is an inclined surface; The housing A comprises a back plate arranged in a vertical direction, a guide rod connector is connected to the upper inner side of the back plate, right angle brackets are respectively arranged at opposite ends of the inner side of the back plate, and auxiliary guide mechanisms are respectively installed on the two right angle brackets; The auxiliary guide mechanism comprises a guide bolt fixed on the right-angle bracket, and a return spring is coaxially sleeved on the guide bolt; The positioning mechanism includes two parallel guide rods, on which positioning elements are provided, and the housing B, the passive clamping block, and the housing A are synchronously sleeved on the two guide rods from left to right, the passive clamping block and the housing B are fixed at one end of the guide rod, and the active clamping block can slide along the guide rod with the housing A; The housing B comprises a shell, a switch is mounted on the upper surface of the shell, and an adjustment block is provided at the inner upper end of the shell; The positioning element comprises a bottom plate, the two ends of the bottom plate are respectively sleeved on the two guide rods, and one end of the bottom plate is fixed on the adjustment block, the upper end of the bottom plate is evenly provided with spring pins, a pressure plate is provided on the spring pins in the horizontal direction, the pressure plate is connected to the switch through a wire rope, a locking plate is provided above the pressure plate, and the locking plate is connected to the upper surface of the guide rod connector; The active clamping block has the same structure as the passive clamping block; The structure of the active clamp is as follows: it includes a V-shaped main load-bearing plate and a V-shaped main support plate which are arranged opposite to each other, two sets of track mechanisms are arranged between the main load-bearing plate and the main support plate, the upper and lower sides of the main load-bearing plate and the main support plate are respectively provided with openings, and the positions of the openings on the main load-bearing plate and the main support plate correspond, the two sets of track mechanisms are respectively embedded in the upper and lower openings of the main load-bearing plate and the main support plate, and the main support plate is connected to the axle frame through a spring plunger.

2. A device for assisting the elderly to go up and down stairs according to claim 1, characterized in that: Each set of the crawler mechanism includes two synchronous wheels, which are connected by a synchronous belt. The centers of the two synchronous wheels are coaxially sleeved with wheel axles, and the two ends of the wheel axles are respectively installed on the upper and lower sides of the axle frame, and the axle frame is connected to the main support plate through a spring plunger.

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