CN201216701Y - Air pressure stand assisting chair - Google Patents

Abstract

The utility model relates to a chair which can adjust the height and can help a person in a sitting posture to stand up. The standing aid chair comprises a chair frame, a chair back, a chair seat, chair legs, armrests and a position adjustment system. The control button drives the motor and drives the air compressor and telescopic cylinder to move, and the telescopic cylinder drives the height adjustment mechanism and the lifting aid mechanism to complete the height adjustment of the chair and the flipping and reset action of the seat when standing up. The locking device can lock the required proper position. The air pressure standing aid chair completes the height adjustment and standing aid action of the chair completely through electrical and mechanical devices. The elderly and disabled persons with impaired lower limb function can operate conveniently and stand up easily.

Description

Pneumatic standing chair

technical field

The utility model relates to a chair, in particular to a standing aid chair capable of adjusting height and helping a person in a sitting posture to stand up.

Background technique

When a person stands up from a sitting posture, the joint efforts of multiple joints such as the feet, knees, and waist are required. For the elderly with waist and leg diseases, it is a relatively difficult task. And for the handicapped personnel who have impaired lower limb function, it is the action that can't be finished by oneself especially. Patent 200620023176 discloses a standing aid chair. The armrests of the standing aid chair are hinged on the seat seat through the cranks on both sides. Thereby helping the seated person stand up. Although this standing aid chair can achieve the effect of helping to stand, the disadvantage is that the force used is completely provided by the arms of the person, which is equal to lifting an adult with both hands. It is very laborious for people to complete. In addition, protective baffles are arranged on both sides of the front part of the chair, which makes the structure more complicated; and the height of the chair cannot be adjusted.

Contents of the invention

The purpose of the utility model is to provide a standing aid chair which can adjust the height and help the person in the sitting position stand up easily, which is fast, labor-saving and simple in structure.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: the air pressure standing chair includes a chair frame, a chair back, a chair seat, chair legs and a position adjustment system are arranged on the chair frame, and the position adjustment system includes adjustment device, drive device and control device; the adjustment device includes a height adjustment mechanism and a lift-up mechanism, the chair legs are four axially hollow chair legs, and the height adjustment mechanism includes four slide bars, the upper ends of which are respectively fixed on At the four corners of the chair frame, the sliding bar body is slidably matched with the inner holes of the four chair legs, and a locking mechanism is provided at the part where the upper end of each chair leg contacts the sliding bar; the front part of the seat is hinged on the chair frame to help The lifting mechanism is set on the bottom surface of the seat; the driving device includes a motor, an air compressor connected to the motor, and a telescopic cylinder connected to the air compressor. The primary piston of the telescopic cylinder is connected to the chair frame. The secondary piston of the cylinder is connected with the lift-up mechanism on the seat; the control device includes a control button, which is respectively connected with the motor, the telescopic cylinder and the locking device through wires.

The lifting aid mechanism includes a guide rail and a slide block, the guide rail is fixed on the back of the seat according to the front and rear longitudinal positions through the brackets arranged at its two ends, the rear end of the guide rail is higher than the front end, and the whole guide rail is provided with an inclination angle β relative to the horizontal plane, The slide block is hinged on the upper end of the secondary piston of the telescopic cylinder, and the inner hole of the slide block is slidably matched with the guide rail.

The locking mechanism includes a locking sleeve screwed to the chair leg, two half-ring electromagnets arranged between the locking sleeve and the slide bar, and coils respectively wound on the electromagnets, and the two ends of each coil pass through the The wire is connected with the control button, and the N pole end of each electromagnet is connected with the S pole end of the other electromagnet through a spring.

There is an inner boss on the upper end surface of the inner hole of the chair leg, and a stopper is arranged on the lower end of the slide rod; the inclination angle of the guide rail relative to the horizontal plane β≥7°; there is also an armrest on the chair frame, and the control button is fixed on the armrest superior.

The retaining sleeve is hinged to the lower end of the slide bar through pins; rollers are respectively arranged at the bottom ends of the four chair legs.

Since the adjustment device, the driving device and the control device are set in the position adjustment system on the chair, and the height adjustment mechanism and the lifting aid mechanism are set in the adjustment device, the adjustment of the height of the chair and the turning action of the seat when it is assisted are completely driven by the drive. The electrical and mechanical devices in the device are completed, and the user only needs to manipulate the buttons in the control device by hand, which greatly reduces the workload of the operator, and makes it convenient for the elderly with inconvenient activities and the disabled with impaired lower limb function. Easy to operate, stand up easily, and the main devices are arranged under the seat, making the appearance of the whole chair more simple and pleasing to the eye.

Description of drawings

Fig. 1 is the external structure schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the internal structure of the locking mechanism;

Fig. 3 is the schematic diagram of B-B section among Fig. 1;

Fig. 4 is a structural schematic diagram of the lifting aid mechanism.

Detailed ways

The air pressure standing aid chair comprises a chair frame 5, and a chair back 6 arranged on the chair frame 5, a seat 10, chair legs 14, armrests and a position adjustment system, and the position adjustment system includes an adjustment device, a driving device and a control device three parts. Wherein the adjustment device includes a height adjustment mechanism and a lifting aid mechanism. In order to adjust the height conveniently, the chair legs 14 are respectively four axially hollow chair legs. The height adjustment mechanism includes four slide bars 12, and the upper ends of the slide bars 12 are respectively fixed. At the four corners of the chair frame 5, the slide bar bodies are slidably matched with the inner holes of the four chair legs respectively. In order to fix the position after the height is adjusted, a locking mechanism is provided at the position where the upper end of each chair leg 14 is in contact with the slide bar 12 . The front portion of the seat base 10 is hinged on the chair frame 5 by pins 11 or bolts. The driving device includes an air tank 15, a motor 2, an air compressor connected to the motor and a telescopic pneumatic cylinder 4 connected to the air compressor. In this embodiment, a CTA series telescopic pneumatic cylinder is used. The primary piston of the telescopic pneumatic cylinder 4 is fixedly connected with the chair frame 5, and the secondary piston of the telescopic pneumatic cylinder 4 is connected with the lifting aid mechanism on the seat 10. Control device comprises control button 9, and control button 9 is fixed on the position of convenient operation on the armrest, and control button 9 is connected with control valve 3 and locking device on motor 2, telescopic pneumatic cylinder 4 respectively by wire. In this embodiment, the locking mechanism includes a locking sleeve 13, an electromagnet 16 and a coil 18. The locking sleeve 13 is connected to the chair leg 14 by threads, and the electromagnet 16 is two semi-circular magnets arranged on the lock In the cavity between the inner hole of the tight sleeve 13 and the outer circle of the slide bar 12, coils 18 are respectively wound on the two electromagnets, and the two ends of each coil are respectively connected with the control button 9 by wires, and each electromagnet The N pole one end of the electromagnet is connected with the S pole one end of another electromagnet by spring 19. After electrification, electromagnet 16 overcomes the spring pressure and attracts each other, and the slide bar 12 is held tightly to lock the required height position. When the lock is released, the current is cut off, and the two electromagnets no longer attract each other, and the spring force forces the two electromagnets 16 to release the slide bar 12 . In addition, the locking mechanism can also adopt locking methods such as wedges, latches or screws. In the present embodiment, the lifting aid mechanism includes a guide rail 7 and a slide block 8, the guide rail 7 is fixed on the back of the seat 19 according to the front and rear longitudinal positions by the brackets arranged at its two ends, and the slide block 8 is hinged on the telescopic pneumatic cylinder 4 The upper end of the secondary piston, the inner hole of the slide block 8 is slidably matched with the guide rail 7. In order to prevent the blockage between the slider 8 and the guide rail 7, the installation position of the guide rail 7 is set so that the rear end is higher than the front end, so that the guide rail 7 has an inclination angle β relative to the horizontal plane. In this embodiment, β≥7° is enough . In addition, it is also possible to set up a T-shaped slideway instead of a guide rail, and use rollers matched with the slideway instead of a slider. This scheme does not need to set the inclination angle β. In order to limit the rising height of the slide bar 12, an inner boss is provided on the upper end surface of the inner hole of the chair leg 14, and a stopper 17 is provided at the lower end of the slide bar 12; Table contact prevents separation from each other. In this embodiment, in order to prevent the blocking sleeve 17 from being stuck in the inner hole of the chair leg 14 when it is raised and lowered, the blocking sleeve 17 is hinged to the lower end of the slide bar 12 through a pin, and can rotate around the pin to a certain extent. In addition, it is also possible to fix the retaining sleeve and the sliding rod together under the condition of ensuring a certain clearance, or set the outer circle of the retaining sleeve to be spherical. In addition, in order to facilitate the movement of the chair, rollers 1 are respectively provided at the bottom ends of the four chair legs 14 .

Its working principle is:

When adjusting the height, press the lift key of the control button, the motor drives the air compressor through the control valve to input the high-pressure gas from the air tank into the telescopic pneumatic cylinder, and drives the first-stage piston of the telescopic pneumatic cylinder to drive the chair frame up to the desired height. height required. Then press the locking key of the control button, and the electromagnet will hold the slide bar tightly to lock the height position. When lowering the position, reverse the operation, first press the release button of the control button to release the locked state, then press the down button, and release the high-pressure gas in the telescopic pneumatic cylinder through the two-position four-way reversing valve in the air pressure system , the chair frame can be lowered to a suitable position with the first-stage piston. The time of pressing the up button or down button is proportional to the distance of the chair frame up and down, and jogging can be used when fine-tuning is required.

When it is necessary to stand up, press the flip button of the control button, the motor drives the air compressor through the control valve to input high-pressure gas from the air tank into the telescopic pneumatic cylinder, and drives the secondary piston of the telescopic pneumatic cylinder to rise through the lifting mechanism. The chair seat is tilted and flipped counterclockwise, pushing the human body forward and upward to assist the human body to stand up. On the selected telescopic pneumatic cylinder, the lift of its secondary piston is 150mm, which can make the seat reach a maximum angle of 60° when it is tilted and turned over, which is the best angle for people to stand up smoothly. When the seat needs to be reset, press the down button again to release the high-pressure gas in the telescopic pneumatic cylinder, and the seat can fall back to the horizontal position with the secondary piston.

The standing aid chair is suitable for people with moderate weight (below 75 kg) who have difficulty standing after sitting for a long time due to waist and leg diseases.

Pneumatic standing chairs pollute the air less than using hydraulics.

Claims (5)

1. An air pressure standing aid chair, comprising a chair frame, a chair back, a chair seat, chair legs and a position adjustment system are arranged on the chair frame, it is characterized in that: the position adjustment system includes an adjustment device, a driving device and a control device The adjustment device includes a height adjustment mechanism and a lift-up mechanism. The chair legs are four axially hollow chair legs. The height adjustment mechanism includes four slide bars. The upper ends of the slide bars are respectively fixed on the four corners of the chair frame. Slidingly fit with the inner holes of the four chair legs respectively, and a locking mechanism is provided at the part where the upper end of each chair leg is in contact with the slide bar; the front part of the seat is hinged on the chair frame, and the lifting mechanism is set On the bottom surface; the driving device includes a motor, an air compressor connected to the motor, and a telescopic cylinder connected to the air compressor. The primary piston of the telescopic cylinder is connected to the chair frame, and the secondary piston of the telescopic cylinder is connected to the chair frame. The lifting aid mechanism on the seat is connected; the control device includes a control button, and the control button is respectively connected with the motor, the telescopic cylinder and the locking device through wires. 2. The air pressure standing aid chair according to claim 1, characterized in that: the lifting aid mechanism includes guide rails and sliders, the guide rails are fixed on the back of the seat according to the front and rear longitudinal positions through the brackets arranged at both ends of the guide rails, and the guide rails The rear end is higher than the front end, and the entire guide rail is provided with an inclination angle β relative to the horizontal plane. The slider is hinged on the upper end of the secondary piston of the telescopic cylinder, and the inner hole of the slider is slidably matched with the guide rail. 3. The pneumatic standing aid chair according to claim 2, characterized in that: the locking mechanism comprises a locking sleeve screwed to the chair leg, and two half-ring electromagnets arranged between the locking sleeve and the sliding rod and the coils respectively wound on the electromagnets, the two ends of each coil are respectively connected with the control buttons through wires, and the N pole end of each electromagnet is connected with the S pole end of another electromagnet through a spring. 4. The pneumatic standing aid chair according to claim 3, characterized in that: an inner boss is arranged on the upper end surface of the inner hole of the chair leg, and a retaining sleeve is arranged on the lower end of the slide rod; the inclination angle β of the guide rail relative to the horizontal plane ≥7°; armrests are also provided on the chair frame, and the control buttons are fixed on the armrests. 5. The pneumatic standing aid chair according to claim 4, characterized in that: the retaining sleeve is hinged to the lower end of the slide bar through a pin; and rollers are respectively arranged at the bottom ends of the four chair legs.

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