Walking machine

Abstract

A walking aid includes a support frame, a rotating arm, a screw, a coupling, a speed reducer, an upper guide rod, a lower guide rod, a front support, a universal wheel, a control frame, a movable support foot, a movable frame, a rear support, a middle support, a rotating hinge seat, a seat plate, a cross bar, a seat support foot, a battery, an electronic control unit, a plunger, a large spring, a pressure plate, a wedge, a small spring, a retaining body, a wedge ring, a set screw, a locking nut, a steel ball, a fixed hinge seat, a shift fork, a lever and a pin. The left side surface of the lower part of the rotating arm is provided with a spherical pit that matches the steel ball and is pressed by the steel ball, the middle part of the rotating arm is threadedly connected with the screw, and the upper part of the rotating arm is fixedly connected with the seat plate. The wedge ring is installed in the lower through hole on the left side of the control frame, the retaining body is installed in the wedge ring, and the retaining body is provided with a through groove, and the through groove is sequentially provided with a wedge and a small spring from right to left. The seat of the walker can be automatically unfolded, and the user can sit on the seat to rest without turning around.

Description

Technical Field

[0001] The invention relates to a walking aid. Background Art

[0002] Many walkers are equipped with seats so that users can sit and rest anywhere while walking. However, the seats of such walkers currently available need to be manually unfolded by the user and the user needs to turn around before sitting on the seat. This is very difficult for users with severe leg and foot disabilities and weak bodies to use. Summary of the invention

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a walking aid, which only needs to press a switch when in use, and the seat will automatically unfold, and the user can sit on the seat to rest without turning around.

[0004] The technical solution adopted by the present invention to solve its technical problem is: the designed walking aid includes a support frame, a rotating arm, a screw, a coupling, a reducer, an upper guide rod, a lower guide rod, a front support, a universal wheel, a control frame, a mobile support, a mobile frame, a rear support, a middle support, a rotating hinge seat, a seat plate, a cross bar, a seat support, a battery, an electronic control unit, a plunger, a large spring, a pressure plate, a wedge block, a small spring, a retaining body, a wedge ring, a set screw, a locking nut, a steel ball, a fixed hinge seat, a fork, a lever and a pin shaft. The front support, the middle support, the rear support, the battery and the electronic control unit are all fixedly installed on the support frame, and the reducer is installed On the front support, the reducer is connected to the screw through a coupling, the screw is rotatably supported on the middle support, the front ends of the upper guide rod and the lower guide rod are installed on the front support, and the rear ends of the upper guide rod and the lower guide rod are installed on the rear support. The upper guide rod, the lower guide rod and the screw are parallel to each other, the control frame and the moving frame are slidably installed on the upper guide rod and the lower guide rod, the middle part of the rotating arm is threadedly connected with the screw, the upper part of the rotating arm is fixedly connected with the seat plate, the upper end of the moving support foot is hinged with the seat plate through a rotating hinge seat, the middle part of the moving support foot is connected with the moving frame, the seat support foot is hinged with the seat plate, and the two ends of the cross bar are respectively connected to the middle part of the seat support foot and the middle part of the moving support foot The seat legs, movable legs, crossbars and seat plates form a parallelogram mechanism. The rotation axis of the rotating hinge seat is in the same straight line as the screw axis. Two through holes are opened on the left side of the control frame, and a through groove is opened at the bottom of the upper through hole from the right end. The upper through hole is equipped with a steel ball, a plunger and a large spring from right to left. A ring groove is provided in the middle of the plunger, and the shift fork is clamped in the ring groove. The lower part of the shift fork is slotted. The middle part of the lever is hinged with the fixed hinge seat. One end of the pin is fixedly installed on the upper part of the lever, and the other end extends into the groove opened at the lower part of the shift fork. The wedge ring is provided with a conical inner hole. The cone angle of the conical inner hole meets The self-locking condition of the wedge block, the wedge ring is installed in the lower through hole on the left side of the control frame, the retaining body is installed in the wedge ring, the retaining body is provided with a through groove, the through groove is provided with a wedge block and a small spring from right to left, the bottom surface of the wedge block is a concave arc surface matched with the upper guide rod, the top surface of the wedge block is a convex arc surface matched with the conical inner hole of the wedge ring, a threaded hole for assembling a fixing screw is provided on the upper right side of the control frame, a spherical pit matched with a steel ball is provided on the left side of the lower part of the swing arm and is pressed by the steel ball, the right side of the lower part of the swing arm is fixed by the end of the fixing screw, the electronic control unit controls the reducer, and a universal wheel is installed at the front bottom of the support frame.

[0005] The coupling described in this technical solution can be a rigid coupling.

[0006] The working principle of the present invention is: when the seat needs to be unfolded, the electronic control unit controls the reducer to drive the screw to rotate counterclockwise (from the front of the support frame to the rear). At this time, the torque on the rotating arm cannot squeeze out the steel ball in the spherical pit on the left side of its lower part, so the rotating arm and the seat plate directly connected thereto and the movable support foot indirectly connected thereto move to the right together. When the rotating arm is blocked by the middle support and cannot continue to move, the rotating arm forces the steel ball in the spherical pit to be squeezed out and rotates counterclockwise with the screw. Because the seat support foot, movable support foot, cross bar and seat plate are parallelogram mechanisms, the movable support foot is always kept in a vertical state by the restriction of the movable frame. Therefore, the rotating arm drives the seat plate to rotate counterclockwise, and the seat support foot gradually unfolds. When the seat plate rotates to a horizontal position, the seat support foot is fully unfolded and vertically touches the ground. At this time, the electronic control unit stops the reducer and the seat is unfolded. In the above process, after the rotating arm squeezes out the steel ball in its spherical pit, the shift fork makes the lower end of the lever disengage from the contact with the wedge block, so that the wedge block is wedged between the upper guide rod and the wedge ring under the action of the small spring. When the seat is retracted, the electronic control unit controls the reducer to drive the screw to rotate clockwise. Due to the wedging effect of the wedge block, the control frame cannot move, and the seat plate also starts to rotate clockwise from the horizontal position following the screw. When the seat plate is turned to the vertical position, the seat support leg is completely recovered, and the large spring presses the steel ball back into the spherical pit of the rotating arm through the plunger. At the same time, the lower end of the lever pushes the wedge block to move to the left, causing it to lose its wedging effect. The screw continues to rotate, and due to the restriction of the pressing steel ball, the rotating arm and the seat plate directly connected to it and the movable support leg indirectly connected to it move to the left together. When the movement is in place, the electronic control unit stops the reducer and the seat is completely recovered.

[0007] The beneficial effect of the present invention is that the seat of the walking aid can be automatically unfolded, and the user can sit on the seat to rest without turning around. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is the front view of the present invention.

[0009] Figure 2 yes Figure 1 AA section view.

[0010] Figure 3 yes Figure 1 B view.

[0011] Figure 4 yes Figure 1 Partial view of I.

[0012] Figure 5 yes Figure 3 CC cross-sectional view.

[0013] Figure 6 yes Figure 3 DD cross-sectional view.

[0014] In the figure, 1. support frame, 2. rotating arm, 3. screw, 4. coupling, 5. reducer, 6. upper guide rod, 7. lower guide rod, 8. front support, 9. universal wheel, 10. control frame, 11. mobile support foot, 12. mobile frame, 13. rear support, 14. middle support, 15. rotating hinge seat, 16. seat plate, 17. cross bar, 18. seat support foot, 19. battery, 20. electronic control unit, 21. plunger, 22. large spring, 23. pressure plate, 24. wedge block, 25. small spring, 26. retaining body, 27. wedge ring, 28. set screw, 29. locking nut, 30. steel ball, 31. fixed hinge seat, 32. fork, 33. lever, 34. pin shaft. DETAILED DESCRIPTION

[0015] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As can be seen from the figure, the walking aid according to the embodiment of the present invention comprises a support frame 1, a rotating arm 2, a screw rod 3, a coupling 4, a reducer 5, an upper guide rod 6, a lower guide rod 7, a front support 8, a universal wheel 9, a control frame 10, a mobile support leg 11, a mobile frame 12, a rear support 13, a middle support 14, a rotating hinge seat 15, a seat plate 16, a cross bar 17, a seat support leg 18, a battery 19, an electronic control unit 20, a plunger 21, a large spring 22, a pressure plate 23, a wedge block 24, a small spring 25, a retaining body 26, a wedge ring 27, a set screw 28, a locking nut 29, a steel ball 30, a fixed hinge seat 31, a shift fork 32, a lever 33 and a pin 34. The front support 8, the middle support 14, the rear support 13, the battery 19 and the electronic control unit 20 are all fixedly mounted on the support frame 1. The reducer 5 is mounted on the front support 8, and the reducer 5 is connected to the screw 3 through the coupling 4, and the coupling 4 is a rigid coupling 4. The screw 3 is rotatably supported on the middle support 14. The front ends of the upper guide rod 6 and the lower guide rod 7 are mounted on the front support 8, and the rear ends are mounted on the rear support 13. The upper guide rod 6, the lower guide rod 7 and the screw 3 are parallel to each other. The control frame 10 and the mobile frame 12 are slidably mounted on the upper guide rod 6 and the lower guide rod 7. The middle part of the rotating arm 2 is threadedly connected to the screw 3, and the upper part of the rotating arm 2 is fixedly connected to the seat plate 16. The upper end of the mobile support leg 11 is hinged to the seat plate 16 through a rotating hinge seat 15, and the middle part of the mobile support leg 11 is connected to the mobile frame 12. The seat foot 18 is hinged to the seat plate 16, and the two ends of the cross bar 17 are respectively hinged to the middle of the seat foot 18 and the middle of the movable foot 11. The seat foot 18, the movable foot 11, the cross bar 17 and the seat plate 16 form a parallelogram mechanism. The rotation axis of the rotating hinge seat 15 is in the same straight line as the axis of the screw 3. The control frame 10 has two upper and lower through holes on the left side, and a through groove is opened at the bottom of the upper through hole from the right end. The upper through hole is equipped with a steel ball 30, a plunger 21 and a large spring 22 from right to left. The middle part of the plunger 21 is provided with an annular groove, and the fork 32 is clamped in the annular groove. The lower part of the fork 32 is grooved. The middle part of the lever 33 is hinged to the fixed hinge seat 31, and one end of the pin 34 is fixedly installed on the upper part of the lever 33, and the other end extends into the groove opened at the lower part of the fork 32. The wedge ring 27 is provided with a conical inner hole, and the cone angle of the conical inner hole meets the self-locking condition of the wedge block 24. The wedge ring 27 is installed in the lower through hole on the left side of the control frame 10, and the retaining body 26 is installed in the wedge ring 27. The retaining body 26 has a through groove, and the wedge block 24 and the small spring 25 are installed in the through groove from right to left. The bottom surface of the wedge block 24 is a concave arc surface that matches the upper guide rod 6, and the top surface of the wedge block 24 is a convex arc surface that matches the conical inner hole of the wedge ring 27. The upper right side of the control frame 10 is provided with a threaded hole for assembling the set screw 28. The left side surface of the lower part of the swing arm 2 is provided with a spherical pit that matches the steel ball 30 and is pressed by the steel ball 30, and the right side surface of the lower part of the swing arm 2 is fixed by the end of the set screw 28. The electronic control unit 20 controls the reducer 5. A universal wheel 9 is installed at the front bottom of the support frame 1.

[0016] When the seat needs to be unfolded, the electronic control unit 20 controls the reducer 5 to drive the screw 3 to rotate counterclockwise (from the front of the support frame 1 to the rear). At this time, the torque on the rotating arm 2 cannot squeeze out the steel ball 30 in the spherical pit on the left side of its lower part, so the rotating arm 2 and the seat plate 16 directly connected thereto and the movable support foot 11 indirectly connected thereto move to the right together. When the rotating arm 2 is blocked by the middle support 14 and cannot continue to move, the rotating arm 2 forces the steel ball 30 in its spherical pit to be squeezed out and rotates counterclockwise with the screw 3. Because the seat support foot 18, the movable support foot 11, the cross bar 17 and the seat plate 16 are parallelogram mechanisms, the movable support foot 11 is always kept in a vertical state by the restriction of the movable frame 12. Therefore, the rotating arm 2 drives the seat plate 16 to rotate counterclockwise, and the seat support foot 18 gradually unfolds. When the seat plate 16 rotates to a horizontal position, the seat support foot 18 is fully unfolded and vertically touches the ground. At this time, the electronic control unit 20 stops the reducer 5 from working, and the seat is unfolded. In the above process, after the rotating arm 2 squeezes out the steel ball 30 in its spherical concave pit, the shift fork 32 causes the lower end of the lever 33 to be separated from the contact with the wedge block 24, so that the wedge block 24 is wedged between the upper guide rod 6 and the wedge ring 27 under the action of the small spring 25. When the seat is retracted, the electronic control unit 20 controls the reducer 5 to drive the screw 3 to rotate clockwise. Due to the wedging effect of the wedge block 24, the control frame 10 cannot move, and the seat plate 16 also starts to rotate clockwise from the horizontal position following the screw 3. When the seat plate 16 rotates to the vertical position, the seat support 18 is completely recovered, and the large spring 22 presses the steel ball 30 back into the spherical concave pit of the rotating arm 2 through the plunger 21. At the same time, the lower end of the lever 33 pushes the wedge block 24 to move to the left, causing it to lose its wedging effect. The screw rod 3 continues to rotate, and due to the restriction of the compression steel ball 30, the rotating arm 2 and the seat plate 16 directly connected thereto and the mobile support leg 11 indirectly connected thereto just move to the left together. When the movement is in place, the electronic control unit 20 stops the speed reducer 5 work, and the seat is recovered.

Claims

1. A walking aid, comprising a support frame, a rotating arm, a screw, a coupling, a reducer, an upper guide rod, a lower guide rod, a front support, a universal wheel, a control frame, a mobile support, a mobile frame, a rear support, a middle support, a rotating hinge seat, a seat plate, a cross bar, a seat support, a battery, an electronic control unit, a plunger, a large spring, a pressure plate, a wedge block, a small spring, a retaining body, a wedge ring, a set screw, a locking nut, a steel ball, a fixed hinge seat, a fork, a lever and a pin, characterized in that: The front support, middle support, rear support, battery and electronic control unit are all fixedly mounted on the support frame, the reducer is mounted on the front support, the reducer is connected to the screw through a coupling, the screw is rotatably supported on the middle support, the front ends of the upper guide rod and the lower guide rod are mounted on the front support, the rear ends of the upper guide rod and the lower guide rod are mounted on the rear support, the upper guide rod, the lower guide rod and the screw are parallel to each other, the control frame and the mobile frame are slidably mounted on the upper guide rod and the lower guide rod, and the middle part of the rotating arm forms a threaded connection with the screw. The upper part of the rotating arm is fixedly connected to the seat plate, the upper end of the mobile support leg is hinged to the seat plate through a rotating hinge seat, the middle part of the mobile support leg is connected to the mobile frame, the seat support leg is hinged to the seat plate, and the two ends of the cross bar are respectively hinged to the middle part of the seat support leg and the middle part of the mobile support leg. The seat support leg, the mobile support leg, the cross bar and the seat plate form a parallelogram mechanism. The rotating axis of the rotating hinge seat is in the same straight line as the axis of the screw. The left side of the control frame is provided with two upper and lower through holes, and the bottom of the upper through hole is provided with a through hole from the right end. The upper through hole is equipped with a steel ball, a plunger and a large spring from right to left in sequence. The middle of the plunger is provided with a ring groove, the shift fork is clamped in the ring groove, the lower part of the shift fork is slotted, the middle of the lever is hinged with the fixed hinge seat, one end of the pin is fixedly installed on the upper part of the lever, and the other end extends into the groove opened in the lower part of the shift fork. The wedge ring is provided with a conical inner hole, the cone angle of the conical inner hole meets the self-locking condition of the wedge block, the wedge ring is installed in the lower through hole on the left side of the control frame, the retaining body is installed in the wedge ring, and the retaining body is opened with a through hole The through groove is equipped with a wedge and a small spring from right to left in sequence, the bottom surface of the wedge is a concave arc surface matched with the upper guide rod, the top surface of the wedge is a convex arc surface matched with the conical inner hole of the wedge ring, a threaded hole for assembling a fixing screw is provided on the upper right side of the control frame, a spherical pit matched with a steel ball is provided on the left side of the lower part of the swing arm and is pressed by the steel ball, the right side of the lower part of the swing arm is tightened by the end of the fixing screw, the electronic control unit controls the reducer, and a universal wheel is installed at the front bottom of the support frame.

2. The walking aid according to claim 1, characterized in that: The coupling is a rigid coupling.

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