CN105342517A - Hydraulic control assistant standing potty chair and control method thereof - Google Patents

Abstract

The invention provides a hydraulically controlled auxiliary standing commode chair, comprising: a hydraulic device (3), a piezoelectric force sensor (4), a second hydraulic push rod (9), a first hydraulic push rod (7), Support rod (6), tripod (5), are characterized in that: the first hydraulic push rod (7) and the second hydraulic push rod (9) are installed under the seat panel (1), and the hydraulic device (3) is installed On the support plate of the seat, the piezoelectric force sensor (4) is installed on the upper surface of the seat panel, the piezoelectric force sensor (4) is covered with a seat cushion, and the second hydraulic push rod (9) supports Lift the front end of the seat panel, the first hydraulic push rod (7), the support rod (6) and the tripod (5) jointly support the rear end of the seat panel, the first hydraulic push rod (7) and the second hydraulic push rod ( 9) Connected in series in the hydraulic circuit, the hydraulic device (3) provides pressure to the first hydraulic push rod (7) and the second hydraulic push rod (9).

Description

A hydraulically controlled auxiliary standing toilet chair and its control method

technical field

The invention relates to an auxiliary device, in particular to a hydraulically controlled auxiliary standing commode chair and a control method thereof.

technical background

It should be noted that the toilet chair is an indispensable tool in the life of the elderly. However, most of the toilet chairs on the market simply provide support, or only satisfy the comfort of the elderly when sitting on the toilet, and cannot meet more needs of the elderly. Especially for the elderly due to natural physiological degeneration or the influence of some accumulated diseases, the leg and knee joints are damaged, which makes it difficult for the elderly to stand up after sitting on the toilet, and the quality of life is affected. Invention patent CN104305926A discloses a toilet, which mainly includes a seat, a bracket and a shaped water bladder. By controlling the water storage in the water bladder, the angle between the seat and the toilet can be adjusted, thereby helping the elderly to stand or sit down easily. However, in this technology, since the amount of water stored in the water bag is limited, its working force is greatly limited. The utility model patent CN204306991U discloses a special auxiliary toilet chair for the disabled, which includes the No. 1 start telescopic rod and the No. 2 pneumatic telescopic rod at the lower part of the seat, as well as a pneumatic pump. This solution requires two pneumatic telescopic rods and a special pneumatic The pump device increases the difficulty and cost of processing and manufacturing.

Contents of the invention

In order to overcome the shortcomings of the existing products, the invention provides a hydraulic thrust device, which can effectively assist the elderly to stand by acting on the seat surface through the hydraulic thrust to make the seat surface rotate at a certain angle.

The technical solution of the present invention: a hydraulically controlled auxiliary standing toilet chair, comprising: a hydraulic device, a piezoelectric force sensor, a second hydraulic push rod, a first hydraulic push rod, a support rod, and a tripod, characterized in that:

The first hydraulic push rod and the second hydraulic push rod are installed under the seat panel, the hydraulic device is installed on the support plate of the seat, the piezoelectric force sensor is installed on the upper surface of the seat panel, and the piezoelectric force sensor is Covered with seat cushions, the second hydraulic push rod supports the front end of the seat panel, the first hydraulic push rod, the support rod and the tripod jointly support the rear end of the seat panel, the first hydraulic push rod and the second hydraulic push rod In series in the hydraulic circuit, the hydraulic device provides pressure to the first hydraulic push rod and the second hydraulic push rod.

Advantages of the present invention:

(1) Since the present invention adopts a pressure proportional valve, the thrust device can obtain different thrusts.

(2) The present invention uses sensor technology to produce different resistance changes for different patients, thereby controlling the pressure proportional valve to produce different input pressures.

(3) The present invention is provided with a thrust device at the front of the seat, and when the patient is standing, the front of the seat can be lifted slightly to adapt to the bending of the legs.

(4) The seat panel of the present invention is provided with a cushion, so that the patient is more comfortable when using the chair.

(5) The lifting mechanism of the present invention adopts a mechanical amplifying device, so that the chair surface can be inclined at a larger angle.

Description of drawings

Fig. 1 is a schematic diagram of a hydraulically controlled auxiliary standing commode chair according to the present invention;

Fig. 2 is a schematic structural view of the lifting device of the present invention;

Fig. 3 is a schematic diagram of a hydraulic system of the present invention;

Fig. 4 is a schematic diagram of the piezoelectric sensor of the present invention.

Fig. 5 is a schematic diagram of the second hydraulic push rod of the present invention.

Fig. 6 is a schematic diagram of the first hydraulic push rod of the present invention.

Fig. 7 is a front view of the tripod of the present invention.

Fig. 8 is a sectional view and a top view of the connecting pin of the present invention.

Among them: 1-seat panel, 2-toilet hole, 3-hydraulic device, 4-piezoelectric force sensor, 5-tripod, 6-support rod, 7-first hydraulic push rod, 8-seat base, 9-second hydraulic push rod, 10-throttling element, 11-signal amplifier, 12-proportional pressure valve, 13-hydraulic cylinder, 14-three-position four-way electromagnetic reversing valve, 15-overflow valve, 16-connection pin.

specific implementation plan

Below in conjunction with accompanying drawings 1-6, the technical solution adopted by the present invention will be further described.

As shown in Figure 1, a hydraulically controlled auxiliary standing toilet chair includes:

Hydraulic device 3, piezoelectric force sensor 4, first hydraulic push rod 7, second hydraulic push rod 9, support rod 6, tripod 5, wherein, first hydraulic push rod 7 and second hydraulic push rod 9 are installed on Below the seat panel, the hydraulic device 3 is installed on the support plate under the seat.

As shown in Figure 2, the piezoelectric force sensor 4 is installed on the seat panel 1, the piezoelectric force sensor 4 is covered with a seat cushion, the second hydraulic push rod 9 supports the front end of the seat panel 1, the first The hydraulic push rod 7, the support rod 6 and the tripod 5 jointly support the rear end of the seat panel 1, the tripod 5 and the support rod 6 can make the seat surface turn over a larger angle, the first hydraulic push rod 7 and the second hydraulic push rod The rod 9 is connected in series in the hydraulic circuit, and the pressure is provided by the hydraulic device 3 under the seat.

One end of the plunger 7-1 of the first hydraulic push rod 7 is linked with the A end of the tripod 5 through the pin 7-2, and the tail end is connected with the seat base 8 through the pin 16 link. One end of the support rod 6 is linked with the B end of the tripod 5 through a pin 16 , and the other end is linked with the seat base 8 through a pin 16 . The C end of the tripod 8 is linked to the rear end of the seat panel 1 by a pin 16 . Wherein the end A is the end that the tripod 5 is connected to the seat panel 1, the end B is the end that the tripod 5 is connected to the support rod 6, and the end C is the plunger 7 of the tripod 5 and the first hydraulic strut 7 The end to which -1 is connected. One end of the plunger 9-1 of the second hydraulic push rod 9 is linked with the seat base 8 through the pin 9-2, and the tail end of the second hydraulic push rod 9 is linked with the front of the seat panel 1 through the pin 16. Together.

The oil enters the first hydraulic push rod 7, and pushes the first plunger 7-1 to move, so that the rear end of the seat panel 1 is lifted. The hydraulic oil output by the first hydraulic push rod 7 is decompressed by the throttling element 10 and the relief valve 15, and then used as the input hydraulic oil of the second hydraulic push rod 9 to push the second plunger 9-1 to move, thereby pushing the seat panel 1 The front end goes up.

Since the first hydraulic push rod 7 starts before the second hydraulic push rod 9, under the restriction of the relief valve 15 and the throttling element 10, the input pressure and input flow of the second hydraulic push rod 9 are smaller than the first hydraulic push rod 7 The output pressure and output flow, so the lifting amount of the rear end of the seat panel 1 is greater than the lifting amount of the front end of the seat panel 1, thereby assisting the patient to stand.

When the patient is sitting or standing, the piezoelectric force sensor 4 on the chair surface feels the pressure change, and the pressure change is processed by the conversion circuit, the amplification circuit and the CPU as the input current of the proportional pressure valve 12, thereby controlling the overflow pressure of the entire system.

As shown in Figure 3, the present invention also provides the working process of the auxiliary standing toilet chair controlled by hydraulic pressure, and its steps are as follows:

Step 1: When the patient sits or stands, the piezoelectric force sensor installed on the chair surface feels the pressure, and when the patient sits on it, the resistance changes.

Step 2: Use a 12v DC power supply as the bridge excitation power supply. When the piezoresistor changes, the output voltage will change.

Step 3: After the output voltage is sampled and held by the filter circuit, it passes through the amplification circuit to amplify the output voltage.

Step 4: Preset the parameters to input the data into the CPU, and perform D/A conversion of the digital quantity into an analog quantity signal through the calculation and processing of the parameters.

Step 5: After the analog signal is proportionally amplified, the output is controlled and adjusted by 4 potentiometers, and then output to the electronic amplifier board through the corresponding terminal.

Step 6: The control signal output by the computer is used as the input signal of the electronic amplifier board. After shaping, comparison, feedback, amplification and isolation, it is sent to the control power triode, and then controls the proportional pressure valve coil to control the pressure of the hydraulic system.

Step 7: The pressure controlled by the proportional pressure valve is input into the hydraulic system to provide different hydraulic thrusts for patients with different weights.

As shown in Figure 4, the present invention also designs the above hydraulic circuit, three-position four-way electromagnetic reversing valve 14 and overflow valve 15, throttle valve 10, proportional pressure valve 12, first hydraulic pressure push rod 7 and second hydraulic pressure Push rod 9 forms hydraulic control circuit. Because the bearing capacity of the first hydraulic push rod 7 is greater than that of the second hydraulic push rod 9, an overflow valve 15 and a throttle valve 10 are connected at the oil outlet of the first hydraulic push rod 7 to control the flow into the second hydraulic push rod 9. The pressure and flow of two hydraulic push rods 9. The proportional pressure valve 12 is used as a relief valve to control the pressure entering the system. The proportional pressure valve 12 is used as a relief valve here, and its relief pressure is 5% greater than the thrust, and the pressure here is set by the CPU. The proportional pressure valve 12 controls the pressure of the system according to the current entering the system. The chair surface is equipped with a piezoelectric force sensor 4. When the sensor 4 senses the weight of the patient, its resistance changes, which causes the output voltage of the bridge to change. The output voltage is sent to the CPU for A/D after being processed by the filter circuit and the amplifier circuit. Conversion, and then the output current is used as the input current of the proportional pressure valve 12, thereby controlling the change of the system pressure.

As shown in FIG. 4 , the diaphragm force sensor 4 is installed on the seat panel. When the patient sits on it, the force sensor 4 monitors the signal change, which causes the change of the pressure sheet resistance R1. Ue is used as the bridge excitation power supply. When the resistance of the resistance strain gauge R1 changes, the output voltage Uo changes. Normally, the output signal of the sensor is very weak, and needs to be sampled and held by the filter circuit and then amplified by the amplifier circuit as the input current of the proportional pressure valve 12 .

While certain features of the invention have been illustrated and described herein, many modifications, substitutions, changes and equivalents will now occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.

Claims (3)

1. the aiding upright chair for closet of a hydraulic control, comprise: hydraulic means hydraulic means (3), piezoelectric force transducer (4), the second hydraulic push rod (9), the first hydraulic push rod (7), support bar (6), tripod (5), is characterized in that:

First hydraulic push rod (7) and the second hydraulic push rod (9) are arranged on the below of seat panel (1), hydraulic means (3) is arranged on the fagging of seat, piezoelectric force transducer (4) is arranged on the upper surface of seat panel (1), piezoelectric force transducer (4) is coated with seat cushion above, second hydraulic push rod (9) supports seat panel (1) front end, first hydraulic push rod (7), support bar (6) and tripod (5) common support play seat panel (1) rear end, first hydraulic push rod (7) and the second hydraulic push rod (9) are connected among underground, hydraulic means (3) provides pressure to the first hydraulic push rod (7) and the second hydraulic push rod (9).

2. the aiding upright chair for closet of hydraulic control according to claim 1, is characterized in that:

The plunger at one end of the first hydraulic push rod (7) is held with the A of tripod by pin (7-2) and is linked, and the tail end of the first hydraulic push rod (7) is linked together by pin (16) and seat base (8); Support bar (6) one end is held with the B of tripod by pin (16) and is linked, and the other end is linked together with seat base (8) by pin (16) link; The C end of tripod is linked in seat panel (1) rear end by pin (16);

Second hydraulic push rod (9) one end is linked together with seat base (8) by pin (9-2) link, and tail end is linked together with seat panel (1) front portion by pin (16) link;

The fluid exported by hydraulic jack (13) enters the first hydraulic push rod (7), promotes plunger (7-1) mobile, thus makes seat panel (1) rear end lifting; The plunger (9-1) that the hydraulic oil that first hydraulic push rod (7) exports promotes the second hydraulic push rod (9) as the input hydraulic pressure oil of the second hydraulic push rod (9) after restricting element (10) and overflow valve (15) decompression is mobile, thus promotes seat panel (1) front end rises;

Because the first hydraulic push rod (7) starts prior to the second hydraulic push rod (9), and under the restriction of restricting element (10) and overflow valve (15), the input pressure of the second hydraulic push rod (9) and input flow rate are less than output pressure and the output flow of the first hydraulic push rod (7), therefore the Uplifting amount of seat panel (1) rear end is greater than the Uplifting amount of seat panel (1) front end, thus assisting patients stands.

3. the method for work of the aiding upright chair for closet of hydraulic control according to claim 1, is characterized in that comprising step:

Step 1: during patient's sitting, the piezoelectric force transducer that seat is installed experiences pressure, when patient takes, causes resistance variations;

Step 2: adopt 12v dc source as bridge excitation power supply, when voltage dependent resistor changes, cause the change of output voltage;

Step 3: output voltage after filtering circuit sampling keeps, later through amplifying circuit, amplifying this output voltage;

Step 4: preset parameter makes data input CPU, converts analog signals to through digital quantity being carried out D/A to the calculation process of parameter;

Step 5: this analog signal, again after scale amplifying, is exported and controlled to adjust by 4 potentiometers, and then output to electronics amplification board by corresponding binding post;

Step 6: the control signal that computer exports is input into signal as electronics amplification board, through shaping, compares, feed back, amplifies and isolated transmission past control pliotron, then control ratio pressure valve coil, thus hydraulic control system pressure;

Step 7: in the pressure input hydraulic pressure system that proportional pressure valve controls, the patient for different weight provides the hydraulic thrust of different size.