A lift-up chair with hand-pulling device
A hand-pull and hand-pull rod technology, which is applied in transportation and packaging, vehicle rescue, medical science, etc., can solve problems such as inconvenient use, unstable grip, and slipping
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Embodiment 1
[0034] The gear set 120 is connected with a pull rod 140, and the pull rod is used to drive the gear set 120;
[0035] The lifting frame 110 is connected with the gear set 120, and the rotating gear set 120 drives the lifting frame 110 to ascend or descend;
[0036] Automatic opening and closing ratchet mechanism, which is connected with the gear set 120, and the automatic opening and closing ratchet mechanism is provided with a ratchet 131, a pawl 132 and an automatic opening and closing assembly;
[0037] When the ratchet wheel 131 rotates clockwise and the ratchet wheel 131 exceeds the first preset rotation range, the automatic opening and closing assembly separates the ratchet wheel 131 and the pawl 132; when the ratchet wheel 131 rotates counterclockwise and the ratchet wheel 131 exceeds the second In a preset rotation range, the automatic opening and closing assembly engages the ratchet wheel 131 and the ratchet pawl 132 .
[0038] The first preset rotation range is tha...
Embodiment 2
[0055] The hand-pulled lifting device 100 is installed on the left and right armrests of the chair frame 200. The chair frame 200 is provided with a chair frame back 210, a left armrest 220 and a right armrest 230; the left armrest 220 There are front legs 221 and second beams 222; the second beam 222 connects the back 210 of the seat frame and the upper end of the front legs 221; the left armrest frame 220 and the right armrest frame 230 are symmetrical.
[0056] The left handrail frame 220 and the right handrail frame 230 are both fixed with the hand-pulled lifting device 100; wherein, the first connecting shaft 121 and the second connecting shaft 122 pass through the second beam 222, the gear set 120 and the automatic The opening and closing ratchet mechanism 130 is close to the outside of the second beam 222 , the first link 119 a is close to the inside of the second beam 222 , and the second link 119 b is hinged to the second beam 222 .
[0057] When using the assisted st...
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