Telescopic crutches with purely mechanical push button switch for timely height adjustment

Abstract

The utility model relates to a telescopic crutch with a purely mechanical button switch for adjusting the height in a timely manner. The crutch can be an armpit crutch or a hand-held crutch. Press the button with your finger and press the handle synchronously, the crutch becomes shorter, the height is lowered, the button is released, and the height is maintained; Press the button with your finger, the handle does not exert an external force of downward pressure, the crutch becomes longer, and the height increases, When the button is released, the height remains unchanged; in the button release state, the handle is pressed down, and the height of the crutch is locked, so the height remains unchanged. A safe, reliable, easy-to-operate, convenient, timely, and fast cane for adjusting the height of the crutches to the height required by the walkers using the crutches is obtained, which is suitable for the disabled of the lower limbs and those with inconvenience or difficulty in moving. It provides great convenience for walkers when they go up the stairs from the level road or when they want to sit lower than standing, allowing them to walk with more dignity.

Description

technical field [0001] The present invention relates to a retractable crutch with a purely mechanical button switch for timely height adjustment. The crutch can be an underarm crutch or a hand-held crutch; the present invention also relates to a gas spring for adjusting the height of the crutch. It particularly relates to the piston mechanical locking mechanism of the internal piston assembly of the gas spring; the present invention also relates to a mechanical switch button that the user of the crutch presses down with one finger, and simultaneously holds the handle with his hand to It is convenient, timely, simple and fast to adjust the height of the crutch to the height required by the walker using the crutch by pushing down the retractable device below, and the finger releases the mechanical button switch and keeps the crutch at this time. A high degree of crutch use; a walker's walking aid. Background technique [0002] Crutches are walking aids for walkers. There are ...

AI Technical Summary

Problems solved by technology

[0005] The distance between the handle and the armrest can be adjusted. The crutches have thread adjustment, rigid material spring adjustment, and pressure springs to eject the boss out of the positioning hole. Different hole positions are adjusted, and two free-type gas springs are installed respectively. There are several adjustment methods for adjustment on the two bracket rods. Further, the crutches have thread adjustment, rigid material spring adjustment, and pressure springs to push out the boss and extend out of the positioning holes. Several adjustment methods for different hole positions cannot be adjusted. Timely adjustment during use cannot meet the requirements of the walker who needs timely adjustment of the length or height of the crutch when walking on a flat road and then going up the stairs or standing and wanting to sit on a stool.

Two controllable gas springs are respectively installed on the two support rods to adjust the adjustment method, as described in Patent No. ZL200620074392.7 and Authorized Publication No. CN2933380Y. Use the underarm on the armrest to apply pressure to the armpit, and the lower pressure is transmitted to the piston rod, so that the distance between the handle and the armrest is shortened, and the height adjustment is realized. Some problems are obvious here Yes, first of all, as we all know, there is a very important vascular nerve plexus passing through the human armpit, which cannot be used to exert pressure. People who use crutches rely on the handle and use the strength of the human arm to support the weight of the human body. ;Secondly, the distance between the hand and the armpit is limited, the length of the step is 16cm, based on the shorter length of 16cm, the gas spring with a piston stroke of 16cm plus the connecting device at both ends, plus the size of the armrest is at least 40cm Above, when the distance between the hand and the armpit is less than the minimum size required for the installation of two controllable gas springs on the two support rods, the controllable gas springs cannot be installed; The switch will bring great inconvenience to the use of the handle, or may malfunction, or even be impossible; in addition, the elastic force of the commonly used controllable gas spring is fixed, and the piston rod stretches when the control switch is turned on. The thrust of the long gas is equal to the pressure required for the retraction and shortening of the piston rod. When the piston assembly does not have a locking mechanism, the locking force of the closed control switch after the piston rod of the gas spring is extended is uncertain or unreliable. The device with the gas spring in the patent number "ZL200620074392.7" will have several bad results. When the piston rod is extended, it can support the weight required by the human body, but when it is pressed back and shortened, the piston rod does not retract, and the piston rod can When it is compressed back to be shortened and needs to be stretched, it cannot support the human body weight, and it rises and falls suddenly when walking (it will fall down). cause safety accidents; moreover, crutches are often used outdoors, when the controllable gas spring of the crutch is exposed to the sun under the scorching sun, the commonly used controllable gas spring does not have a pressure protection device, according to the gaseous equation P1*V1 / T1= P2*V2 / T2, the high-pressure gas in the cylinder cavity of the gas spring increases proportionally, and the controllable gas spring at this time is in danger of explosion

[0006] The distance between the handle and the ground can be adjusted. The commonly used crutches are threaded adjustments, rigid material springs, and top pressure springs that push out the bosses and extend out of the positioning holes to adjust the different hole positions. It cannot meet the requirements of the walker who needs to adjust the length or height of the crutch in time when walking on a flat road and then going up the stairs or standing and wanting to sit on a stool.

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