CN111110463A

CN111110463A - Wheelchair that weak patient independently dosed

Info

Publication number: CN111110463A
Application number: CN202010133352.XA
Authority: CN
Inventors: 迟正; 张琳; 苗海龙
Original assignee: Rizhao Xuanyi Information Technology Co ltd
Current assignee: Qingdao Central Hospital
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-05-08
Anticipated expiration: 2038-09-30
Also published as: CN109106521B; CN111110463B; CN111150568A; CN109106521A; CN111150568B

Abstract

The invention discloses a wheelchair for autonomous drug delivery of a physically weak patient, which belongs to the field of medical instruments and is characterized in that: comprises a wheelchair body and a drug administration assembly; the wheelchair body comprises a seat, armrests, a backrest, a headrest, side baffles and wheels; the drug delivery assembly comprises a drug delivery device, a control box, a hand brake, a drug storage tank, a delay valve and a reversing valve; the control box comprises a lever, a stand column, a base, a fixed block and a first spring; the medicine storage tank is connected with a delay valve through a medicine pipe, and the delay valve comprises a cylinder body and a linkage valve. Compared with the prior art have the characteristics that can be used medicine to sick patient automatically.

Description

Wheelchair that weak patient independently dosed

Technical Field

The invention discloses divisional application of a wheelchair with a self-medicine-supply function (application number: 201811154869.6), and relates to a medical instrument, in particular to a wheelchair for self-administration of weak patients.

Background

The wheelchair is a common travel tool for people with mobility disabilities, particularly, the functions of the existing wheelchair are more and more, the functions of the electric vehicle are integrated, and the self-walking seat is really realized. The wheelchair-used crowd is mostly weak patients, and when the wheelchair is out, the patients can easily delay the illness state because the patients can not take medicine independently in case of emergency.

With the development of pharmacy, the administration route is more and more abundant, and besides oral administration, the spray of the oral-nasal administration route gradually gets on the platform of the conventional medicine. Nasal delivery systems for drugs such as calcitonin are commercially available; several pulmonary, oral or nasal delivery systems for insulin have entered the clinical study. Meanwhile, due to the rapid development of the biopharmaceutical industry, the nasal spray can be used for some biotechnological medicines with low oral bioavailability, such as polypeptides, proteins and nucleic acid medicines, or can be an important way for local or systemic administration of the medicines.

The spray of the oral-nasal administration route does not contain a propellant, liquid medicine is sprayed into a vaporous preparation by means of the pressure of a manual pump, the requirement of the diameter of liquid drops is far lower than that of an aerosol, so that the solution type medicine does not need to be packaged by an internal pressure container with a special valve system, the application range is wider, and the use is safer. Particularly, when old and weak patients go out, haze and pollen allergens in the external environment often induce sudden respiratory diseases and suffocating, and the old patients are difficult to find the medicine and carry out self-administration, even have short-term syncope.

Therefore, the self-administration function is continuously added on the wheelchair, the self-administration for old and weak patients is realized, and the illness state is relieved.

Disclosure of Invention

The technical task of the invention is to provide a wheelchair for the self-administration of drugs for weak patients, aiming at the defects of the prior art.

The technical scheme for solving the technical problem is as follows: a wheelchair for autonomous drug delivery of a physically infirm patient, comprising: comprises a wheelchair body and a drug administration assembly; the wheelchair body comprises a seat, armrests, a backrest, a headrest, side baffles and wheels; the drug delivery assembly comprises a drug delivery device, a control box, a hand brake, a drug storage tank, a pressure tank, a time delay valve and a reversing valve; the headrest is positioned above the backrest, the lower end of the headrest is hinged with the upper end of the backrest, a torsion spring is arranged at the hinged position, and the headrest is provided with an acting force tending to be vertical through the elastic action of the torsion spring; the left side and the right side of the front side of the headrest are respectively provided with a side stop, the side stops are hinged with the headrest, the hinged positions are provided with torsion springs, and the torsion springs apply acting force to the side stops to deflect towards the middle direction through the acting force of the torsion springs; the drug delivery device main body is of an n-shaped rod-shaped or n-shaped hollow tubular structure, two ends of the drug delivery device are respectively positioned at two sides of the headrest, the upper end of the drug delivery device main body is positioned above the headrest, two ends of the drug delivery device main body are hinged with the upper end of the backrest, a torsion spring is arranged at the hinged position, and acting force of the drug delivery device for deflecting backwards is given under the action of the torsion spring; the left, middle and right directions of the medicine feeder are respectively provided with an atomizing nozzle; the control box is positioned at one end of the medicine feeder and comprises a lever, an upright post, a base, a fixed block and a first spring, the middle position of the lever is hinged with the front end of the upright post, the outer end of the lever is positioned behind the end part of the medicine feeder, the inner end of the lever is fixedly connected with a piston pump, and the piston pump is positioned behind the side edge of the headrest; the base is positioned on the box wall of the control box, mutually adaptive sliding rail and sliding groove structures are respectively arranged between the base and the box wall, and the base can slide on the box wall along the inner and outer directions through the sliding rail and sliding groove structures; the hand brake is positioned below the outer side of the wheelchair armrest and is connected with the brake wire; the other end of the brake cable is positioned at the control box, the outer side wall of the control box is provided with a hole for the brake cable core wire to pass through, the brake cable sheath is blocked at the outer side of the hole, and the brake cable core wire end is fixed on the base; the fixed block is positioned in the inner side direction of the base, the fixed block is fixedly connected with the box wall, and the fixed block is connected with the base through a first spring; the medicine storage tank is used for storing medicine liquid, compressed air is injected into the medicine storage tank, and the compressed air provides power for the medicine to be sprayed out; the medicine storage tank is connected with a delay valve through a medicine pipe, and the delay valve comprises a cylinder body and a linkage valve; the linkage valve is characterized in that a medicine inlet of the linkage valve is connected with a medicine storage tank through a medicine pipe, an upper piston and a lower piston are arranged in the cylinder body, the upper piston is connected with the linkage valve through a vertical rod, the upper piston is connected with the lower piston through a second spring, the upper piston and the lower piston jointly divide the cylinder body into an upper cavity, a middle cavity and a lower cavity, the upper piston and the lower piston are respectively provided with a vertical pore, two adjacent cavities are connected through the vertical pore, and the lower cavity and the middle cavity are respectively provided with an opening; the piston pump comprises a shell and a piston, the piston moves in the shell in the front-back direction, a piston rod fixedly connected with the piston is arranged in front of the piston, the front end of the piston rod penetrates through a hole in the front wall of the shell and is exposed out of the shell, and a third spring is arranged behind the piston; the rear end of the shell is provided with an opening, and the opening at the rear end of the shell is connected with the opening of the lower cavity of the cylinder body through an air pipe; the reversing valve comprises a valve body and a valve core, wherein the valve body is of a cylindrical structure, the valve core is positioned in a middle cavity of the valve body, the valve core is of a stepped shaft structure and comprises two thick sections and three thin sections according to the sequence of thin-thick-thin, and a seal is formed between the thick sections and the valve body; the valve body is provided with two inlets and three outlets, the two inlets are connected with a medicine outlet of the linkage valve through medicine pipes, the three inlets are a first inlet, a second inlet and a third inlet from left to right in sequence, and the first to third inlets are respectively connected with atomizing nozzles in the left, middle and right directions on the medicine feeder through the medicine pipes; on the axial position of the reversing valve, two inlets are respectively positioned between the first port and the second port and between the second port and the third port; in a natural state, the two inlets and the second port are positioned at the thin section in the middle of the valve core, and the first port and the third port are respectively positioned at the two thick sections of the valve core; the thin sections at the two sides of the two ends of the valve core are respectively provided with a return spring, and the valve core can be reset under the action of the return springs when the valve core is not subjected to other external forces; the headrest comprises a headrest, side baffles, a sliding block, a connecting rod, a sliding block and side baffles, wherein the side baffles are arranged on the headrest, the two sides of the headrest are respectively provided with a strip-shaped hole in the left-right direction at the outer side of the side baffles, the strip-shaped hole penetrates through the I-shaped sliding block, the width of the end parts of the front end and the rear end of the sliding block in the vertical direction is larger than that of the strip-shaped hole, so that the sliding block can slide left and right along the strip-shaped hole, the sliding; the slide block is connected with one end of the reversing valve core close to the slide block through a rope; the lengths of the two ropes are satisfied, and when the valve core moves outwards to a half distance, the ropes are straightened; a constant pressure valve is connected between the pressure tank and the medicine storage tank; compressed air with the pressure higher than that of the medicine storage tank is injected into the pressure tank; the constant pressure valve comprises a valve shell and a core body; a central hole penetrating through the two ends is formed in the middle of the valve shell, and an air outlet is formed at one end of the central hole; the air outlet is connected with the medicine storage tank; the core body is positioned in the central hole, a fourth spring is arranged between the front end of the core body and the front end of the central hole, and the core body is pushed backwards under the action of the fourth spring; the side wall and the rear end of the core body are respectively provided with an opening, and the two openings are communicated through a hole in the core body; three sealing rings are arranged between the side wall of the central hole and the side wall of the core body, and a first sealing ring, a second sealing ring and a third sealing ring are sequentially arranged from front to back; in a natural state, the opening on the side wall of the core body is positioned between the first sealing ring and the second sealing ring; the position that is located between No. two sealing washers and No. three sealing washers on the centre bore lateral wall is equipped with the opening, and the air inlet of constant pressure valve is connected to this opening, and the air inlet of constant pressure valve is connected the overhead tank.

Compared with the prior art, the invention has the following outstanding beneficial effects:

1. the function is added by modifying the existing wheelchair, so that the practicability is good, the cost is low and the social benefit is great;

2. the patient can carry out self-administration control through head position change;

3. under emergency, even the patient is stupor can administer medicine automatically (carry out the medicine according to the past medical history and predetermine) and carry out the first aid, can spout the medicine according to patient head position accuracy.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a plan view of the control box and the headrest and side guards.

Fig. 3 is a schematic view of the piston pump structure.

Fig. 4 is a schematic diagram of a time-delay valve structure.

Fig. 5 is a schematic view of the diverter valve configuration.

Fig. 6 is a schematic structural view of an air tank, a pressure tank, and a constant pressure valve in embodiment 2.

Fig. 7 is a schematic view of the internal structure of the constant pressure valve in embodiment 2.

FIG. 8 is a schematic side view of the structure of embodiment 3.

FIG. 9 is a schematic rear view of the structure of embodiment 4.

Detailed Description

The invention is further described with reference to the drawings and the detailed description. For convenience of description, the direction of the wheelchair is set to be forward, the opposite direction is backward, the direction in the middle of the wheelchair is inward, and the directions toward both sides are outward.

In example 1, as shown in figures 1 to 5, the present invention comprises a wheelchair body and a drug delivery assembly. The wheelchair body comprises a seat 10, armrests 7, a backrest 6, a headrest 3, side baffles 4 and wheels 9. The administration assembly comprises a medicine feeder 1, a control box 5, a hand brake 8, a medicine storage tank, a time delay valve 20 and a reversing valve 18.

The headrest 3 is positioned above the backrest 6, the lower end of the headrest 3 is hinged with the upper end of the backrest 6, a torsion spring is arranged at the hinged position, and the torsion spring gives an acting force which tends to be vertical to the headrest 3 under the elastic action of the torsion spring. When the head of the patient leans against the headrest 3, the headrest 3 can deflect backwards by a certain angle, and after the head of the patient leaves the headrest 3, the headrest 3 resets under the action of the torsion spring. The left side and the right side of the front side of the headrest 3 are respectively provided with a side baffle 4, the side baffles 4 are hinged with the headrest 3, the hinged parts are provided with torsional springs, and the acting force of the torsional springs is used for deflecting the side baffles 4 towards the middle direction. When the head of a patient leans against the headrest 3 and deflects leftwards or backwards, the side stop 4 can deflect outwards for a certain angle, and after the head of the patient leaves the side stop 4, the side stop 4 is reset under the action of the torsion spring. The side stop 4 has three functions: firstly, when a patient has a rest on the wheelchair, the head of the patient can not deflect to one side autonomously, and the head of the patient can be supported through the action of the side baffle 4, so that the patient is more comfortable; secondly, the side turning of the wheelchair caused by the overlarge inclination angle of the body is prevented; and the third side gear 4 triggers an automatic drug administration switch to control the automatic drug administration mode.

The main body of the medicine feeder 1 is of an n-shaped rod-shaped or n-shaped hollow tubular structure, two ends of the medicine feeder 1 are respectively positioned at two sides of the headrest 3, the upper end of the medicine feeder is positioned above the headrest 3, two ends of the medicine feeder 1 are hinged with the upper end of the backrest 6, a torsional spring is arranged at the hinged position, and acting force for the medicine feeder 1 to deflect backwards under the action of the torsional spring. One or a group of atomizing nozzles 2 are respectively arranged in the left, middle and right directions of the medicine feeder 1, and the liquid medicine is atomized and then sprayed to the mouth and nose of a patient under the action of the atomizing nozzles 2.

The control box 5 is located at one end of the medicine feeder 1, as shown in fig. 2, the control box 5 comprises a lever 12, a stand column 24, a base 23, a fixing block 21 and a spring 22, the middle position of the lever 12 is hinged to the front end of the stand column 24, the outer end of the lever 12 is located behind the end of the medicine feeder 1, the inner end of the lever 12 is fixedly connected with a piston pump 13, and the piston pump 13 is located behind the side edge of the headrest 3. When the patient presses the headrest 3 backwards, the inner end of the lever 12 is pressed backwards by the headrest 3, meanwhile, the front end of the lever 12 is pushed forwards, the medicine feeder 1 is pushed forwards (as shown by a double-line marking part in fig. 1), and the atomizing nozzle 2 on the medicine feeder 1 is positioned in front of the face of the patient after the medicine feeder 1 is pushed out, so that medicine can be sprayed to the patient. The base 23 is located on the box wall of the control box 5, mutually adaptive sliding rail and sliding groove structures are respectively arranged between the base 23 and the box wall, and the base 23 can slide on the box wall along the inner direction and the outer direction through the sliding rail and sliding groove structures. The hand brake 8 is positioned below the outer side of the wheelchair armrest 7, the hand brake 8 is connected with the brake cable 11, and the structures of the hand brake 8 and the brake cable 11 are the same as those of a hand brake and a brake cable in a bicycle. The other end of the brake cable 11 is located at the control box 5, a hole for the core wire 25 of the brake cable 11 to pass through is arranged on the outer side wall of the control box 5, the outer skin of the brake cable 11 is blocked at the outer side of the hole, and the core wire 25 of the brake cable is fixed on the base 23. The fixed block 21 is located in the inner side direction of the base 23, the fixed block 21 is fixedly connected with the box wall, and the fixed block 21 is connected with the base 23 through a first spring 22. The hand brake 8 is held, the base 23 is pulled outward by the action of the brake cable 11, and after the hand brake 8 is released, the base 23 is pulled inward by the action of the first spring 22.

When a patient goes out and wants to rest, the head pushes the headrest 3 backwards, the headrest 3 pushes the medicine feeder 1 forwards through the lever 12, at the moment, if the patient holds the hand brake 8, the base 23 is pulled outwards through the brake wire 11, the inner end of the lever 12 is pressed by the headrest 3, after the base 23 is pulled outwards through the brake wire 11, the inner end of the lever 12 is pulled out from the headrest 3, the hand brake 8 is released, the base 23 resets, the inner end of the lever 12 is located in front of the headrest 3, and the medicine feeder 1 resets. No administration action is initiated.

The medicine storage tank is used for storing medicine liquid, compressed air is injected into the medicine storage tank, and power is provided for medicine spraying through the compressed air. The medicine storage tank is connected with a delay valve 20 through a medicine pipe, and the structure of the delay valve 20 is shown in figure 4 and comprises a cylinder body 50 and a linkage valve 30. The linkage valve 30 medicine inlet is connected with a medicine storage tank through a medicine pipe, an upper piston 41 and a lower piston 38 are arranged in a cylinder body 50, the upper piston 41 is connected with the linkage valve 30 through a vertical rod 31, the linkage valve 30 is opened when the vertical rod 31 rises, the linkage valve 30 is closed when the vertical rod 31 descends, the linkage valve 30 is in the prior art, the internal structure of the linkage valve 30 is not described in any more detail, the upper piston 41 is connected with the lower piston 38 through a second spring 39, the cylinder body 50 is divided into an upper cavity 32, a middle cavity 32, and a

lower cavity

34 and 36 by the upper piston 41 and the lower piston 38, the upper piston 41 and the lower piston 38 are respectively provided with a vertical pore 33 and a vertical pore 35, two adjacent cavities are connected through the vertical pores 33 and the vertical pores 35, and the lower cavity 36 and the middle cavity 34 are respectively provided with

openings

37 and 40.

The piston pump 13 is structurally shown in fig. 3, and comprises a housing 28 and a piston 27, wherein the piston 27 moves in the housing 28 in the front-back direction, a piston rod 26 fixedly connected with the piston 27 is arranged in front of the piston 27, the front end of the piston rod 26 passes through a hole in the front wall of the housing 28 and is exposed out of the housing 28, and a third spring 51 is arranged behind the piston. When the headrest 3 is pressed down backward, the piston 27 is pushed backward by the headrest 3 through the piston rod 26, and when the headrest 3 is separated from the piston rod 26, the piston 27 is pushed forward by the third spring 51. The rear end of the shell 28 is provided with an opening 29, and the opening 29 at the rear end of the shell 28 is connected with the lower cavity opening 37 of the cylinder body through an air pipe.

When the piston 27 is pushed backwards, air in the piston pump 13 enters the lower cavity 36 of the delay valve, the air in the lower cavity 36 pushes the lower piston 38 upwards, the upper piston 41 is pushed upwards through the action of the second spring 39, the upper piston 41 cannot move upwards immediately due to the fact that certain air exists in the upper cavity 32 of the cylinder body, after the upper piston 41 is pushed upwards by the second spring 39, the upper piston 41 compresses the air in the upper cavity 32, the air in the upper cavity 32 gradually overflows from the vertical fine hole 33 in the upper piston 41, the air in the upper cavity 32 is reduced slowly, and therefore the upper piston 41 can move upwards slowly, after the piston moves to a certain distance, the linkage valve 30 is opened through the vertical rod 31, and medicines in the medicine storage tank are sent to the medicine feeder 1 through the linkage valve 30 and the reversing valve 18 in sequence to be taken by a patient. The lower piston 38 is pushed downwards under the action of gravity and the elasticity of the second spring 39, the lower piston 38 compresses air in the lower cavity 36, the air in the lower cavity 36 gradually overflows upwards through the vertical fine hole 35 in the lower piston 38, the air in the lower cavity 36 is slowly reduced, the piston 38 slowly falls under the action of the gravity and the elasticity of the second spring 39, then the upper piston 41 slowly falls, and after the upper piston 41 moves downwards for a certain distance, the linkage valve 30 is closed through the vertical rod 31, medication is stopped, and the harm caused by too much medicine intake of a patient is prevented.

The structure of the reversing valve 18 is shown in fig. 5, and comprises a valve body 44 and a valve core 42, wherein the valve body 44 is in a cylindrical structure, the valve core 42 is positioned in a middle cavity of the valve body 44, the valve core 42 is in a stepped shaft structure and comprises two thick sections and three thin sections according to the sequence of thin-thick-thin, and a seal is formed between the thick sections and the valve body 44. Be equipped with two imports 45 and three exports 49 on the valve body 44, two imports 45 pass through the medicine outlet of pencil connection linkage valve 30, three import 45 from left to right is a mouthful 46, No. two mouthful 47 and No. three mouthful 48 in proper order, and a to No. three

mouthful

46, 47, 48 pass through pencil 19 and connect respectively the atomizer 2 on the left and right three direction on the medicine feeder 1. In the axial position of the diverter valve 18, the two inlet ports 45 are located between the first and

second ports

46, 47 and between the second and

third ports

47, 48, respectively. In a natural state, the two inlet ports 45 and the second port 47 are located at the middle thin section of the valve core 42, and the first port 46 and the third port 48 are located at the two thick sections of the valve core 42 respectively. The two thin sections at the two ends of the valve core 42 are respectively provided with a return spring 43, and the valve core 42 can be reset under the action of the return springs 43 when the valve core 42 is not subjected to other external forces.

The headrest 3 both sides on be located the position in the side fender 4 outside and be equipped with strip hole 14 of controlling the trend respectively, strip hole 14 in pass the slider 15 of I-shaped, the width of the vertical direction of the tip at both ends is greater than the width of strip hole 14 around the slider 15 to slider 15 can be followed strip hole 14 horizontal slip, is connected through connecting rod 16 between the side fender 4 of slider 15 and homonymy, the both ends of connecting rod 16 are articulated mutually with slider 15 and side fender 4 respectively. When the side bar 4 is deflected outward, the slider 15 is pushed outward by the link 16. The slide block 15 is connected with one end of the reversing valve spool 42 close to the slide block 15 through a rope 17, and when the slide block 15 moves towards the outer side, the spool 42 is pulled towards the same side through the rope 17. Wherein the length of two ropes 17 satisfies, when case 42 outwards moves to half the distance, just straighten rope 17, when its aim at prevented a rope 17 pulling case 42, the length of another rope 17 is not enough and leads to unable pulling case 42.

In a natural state, the medicine enters the reversing valve 18 from the inlet 45, flows out from the second port 47, flows into the atomizing nozzle 2 in the middle position on the medicine feeder 1, and is applied to a patient through the nozzle 2; when the head of the patient deviates to one side, for example, when the head deviates to the left, the head of the patient pushes the left side baffle 4 outwards, the slide block 15 is pushed to the left through the connecting rod 16, the slide block 15 pulls the valve core 42 to the left through the rope 17, the thick section on the right side of the valve core 42 blocks the second port 47 and the third port 48, so that the liquid medicine in the reversing valve 18 flows out from the first port 46 and flows into the left atomizing nozzle 2 on the medicine feeder 1, and the left nozzle 2 accurately positions the mouth and the nose of the patient of the medicine nozzle 2 due to the fact that the head of the patient deflects to the left at the moment; also when the head of the patient is shifted to the right, the medicine is ejected from the right ejection head 2.

The operation flow is as follows: after a patient lies down on the wheelchair for rest, the head naturally falls backwards, the headrest 3 is pushed backwards, the medicine feeder 1 is pushed forwards by the headrest 3 through the lever 12, the piston pump 13 is pressed down by the headrest 3, the hand brake 8 is held by the patient at the moment, the base 23 is pulled outwards through the brake wire 11, the lever 12 and the piston pump 13 reset after being pulled out, the medicine feeder 1 also resets along with the medicine feeder, after the hand brake 8 is loosened, the base 23 is pulled inwards through the action of the first spring 22, and the inner end of the lever 12 is positioned in front of the headrest 3. Due to the time-delay action of the time-delay valve 20, the medicine is not ejected during this process, so that the false triggering can be prevented. When the patient needs to independently dose, the head can lean backwards independently, so that the headrest 3 is pushed backwards, and the head can deviate to one side independently so that the side baffle 4 is pushed outwards at the same time in most cases. The medicine feeder 1 is pushed forwards by the headrest 3 through the lever 12, the piston pump 13 is pressed down by the headrest 3, air in the piston pump 13 enters the lower cavity 36 of the delay valve, the linkage valve 30 is opened after a period of time, liquid medicine enters the reversing valve 18, the reversing valve 18 automatically sends the liquid medicine to the corresponding spray head 2 according to the head position of a patient, the medicine is sprayed out through the spray head 2, the linkage valve 30 is driven to be closed by the delay valve 20 after a period of time, the medicine feeding is finished, and therefore the process of automatically feeding the medicine to the patient is completed.

The invention can automatically administer medicine when a patient is ill, and can play a role of emergency treatment for the patient even if the patient is in a coma state.

It should be noted that the specific specification, size and drug dilution of the drug storage tank are determined according to the condition of the patient and the drug condition, and the drug storage tank is particularly suitable for the liquid drug which is atomized and inhaled at fixed time, and has wider dosage range and safe use. The liquid medicine can be prepared at one time in a hospital and replaced by family members or medical care personnel, so that the preferable medicine storage tank is transparent, and the use condition of the medicine can be observed.

The device is particularly suitable for aerosol inhalation treatment which is carried out when people go out and cause discomfort of a respiratory system due to haze stimulation or pollen stimulation.

In example 2, in example 1, since high-pressure air needs to be injected into the drug storage tank, the air pressure becomes small after the drug is ejected every time a patient suffers from a disease, and therefore, the patient needs to be inflated again, particularly, the patient with a large number of times of disease onset needs to be inflated frequently, the operation is complicated, and for the elderly, the memory is reduced, the patient forgets to inflate the drug frequently, the drug cannot be ejected normally after the next disease onset, and the treatment of the disease onset is delayed.

The basic features of this embodiment are similar to those of embodiment 1, and only the technical features different from those of embodiment 1 will be described in this embodiment, and the technical features of the same portions as those of embodiment 1 will not be described again.

As shown in fig. 6, the present embodiment includes a drug storage tank 52 and a pressure tank 54, and a constant pressure valve 53 is connected between the drug storage tank 52 and the pressure tank 54. High-pressure air is injected into the medicine storage tank 52, the injection pressure in the pressure tank 54 is far higher than the compressed air of the medicine storage tank 52, the air pressure in the pressure tank 54 is high, the density is high, the air storage capacity is large, and a high-pressure air source can be provided for the medicine storage tank 52 for a longer time.

The constant pressure valve 53 is constructed as shown in fig. 7, and includes a valve housing 55 and a core 58. The middle of the valve casing 55 is provided with a central hole 56 penetrating through the two ends, and one end of the central hole 56 is an air outlet. For convenience, the direction of the end is set to be rear, and the direction of the other end is set to be front. The air outlet is connected with a medicine storage tank 52. The core body 58 is positioned in the central hole 56, a four-gauge spring 59 is arranged between the front end of the core body 58 and the front end of the central hole 56, and the core body 58 is pushed backwards under the action of the four-gauge spring 59.

The side wall and the rear end of the core body 58 are respectively provided with an opening, and the two openings are communicated through a hole 57 in the core body 58. Three sealing rings 60, 61 and 62 are arranged between the side wall of the central hole 56 and the side wall of the core body 58, and one to three sealing rings 60, 61 and 62 are arranged from front to back in sequence, so that gaps between the side wall of the central hole 56 and the side wall of the core body 58 can be sealed under the action of the sealing rings 60, 61 and 62, and air is prevented from flowing randomly. In the natural state, the opening in the sidewall of the core 58 is located between the first sealing ring 60 and the second sealing ring 61. An opening is formed in the side wall of the central hole 56 at a position between the second sealing ring 61 and the third sealing ring 62, the opening is connected with an air inlet 63 of the constant pressure valve 53, and the air inlet 63 of the constant pressure valve 53 is connected with the pressure tank 54.

When the air pressure in the medicine storage tank 52 is too high, the medicine liquid spraying speed is too high and greatly exceeds the absorption speed of a patient, so that medicine waste is caused. The air pressure within the canister 52 should be controlled within a certain range.

The constant pressure valve 53 works as follows: the rear end in the central hole 56 is communicated with the medicine storage tank 52, and the air pressure of the medicine storage tank 52 is the same as that of the medicine storage tank; the front end of the central bore 56 is connected to the atmosphere, and the pressure is equal to the atmospheric pressure. Because the air pressure in the medicine storage tank 52 is greater than the atmospheric pressure, the air pressure received by the rear end of the core body 58 is greater than the air pressure received by the front end of the core body 58, and the pressure difference between the two ends of the core body 58 can be compensated through the action of the four-number spring 59, so that the stress of the core body 58 is balanced. After the medicine is sprayed out of the spray head, the air pressure in the medicine storage tank 52 is reduced, the air pressure at the rear end of the central hole 56 is reduced along with the reduction of the air pressure, the core body 58 is pushed to move backwards under the action of the fourth spring 59, the opening on the side wall of the core body 58 moves backwards along with the reduction of the air pressure, after the opening moves to a position between the second sealing ring 61 and the third sealing ring 62, the air inlet 63 and the air outlet of the constant pressure valve 53 are communicated, so that the air in the pressure tank 54 can enter the medicine storage tank 52, and after the air pressure in the medicine storage tank 52 is increased, the core body 58 is pushed forwards under the action of the air pressure and is restored to the original position.

In this embodiment, can store more compressed air through pressure tank 54's effect, can supply the patient to use many times, make medicine storage tank 52 internal gas pressure keep invariable through the effect of constant pressure valve 53 to the shower nozzle can invariable speed and strength blowout liquid medicine.

In the embodiment 3, in the above embodiment, since high-pressure air needs to be injected into the medicine storage tank, the air pressure becomes small after the medicine is sprayed each time the patient suffers from a disease, so that the patient needs to be inflated again, particularly for the patient with a large number of diseases, frequent inflation is needed, the operation is complicated, and for the elderly, the memory is reduced, the patient often forgets to inflate the medicine, so that the medicine cannot be normally sprayed after the next disease, and the treatment of the disease is delayed.

As shown in fig. 8, in the present embodiment, the wheelchair wheel 9 is fixedly connected to the wheel axle 66, when the wheel 9 rotates, the wheel axle 66 can rotate synchronously therewith, the wheel axle 66 of the wheel 9 is connected to the rotating shaft of the peristaltic pump 64, so that the wheel axle 66 can drive the peristaltic pump 64 to operate. The outlet of the peristaltic pump 64 is connected with the medicine storage tank 4. The medicine storage tank 4 can be automatically inflated under the action of the peristaltic pump 64 when the wheelchair travels, so that certain air pressure is always kept in the medicine storage tank 4.

In embodiment 4, the basic features of the present embodiment are the same as those of embodiment 1, and in the present embodiment, only the technical features different from those of embodiment 1 will be described, and the technical features of the same portions as those of embodiment 1 will not be described again.

As shown in fig. 9, in the present embodiment, the wheelchair wheel 9 is fixedly connected to the wheel axle 66, and when the wheel 9 rotates, the wheel axle 66 can rotate synchronously therewith. The peristaltic pump 64 is arranged on the inner side of the wheel shaft 66, and the jaw clutches 65 which are matched with each other are respectively arranged on the rotating shaft of the peristaltic pump 64 and the inner side end of the wheel shaft 66. When the peristaltic pump 64 moves towards the inner side, the jaw clutch 65 is separated, and the wheel shaft 66 is separated from the rotating shaft of the peristaltic pump 64; when the peristaltic pump 64 is moved in an outboard direction, the dog clutch 65 engages so that the axle 66 can drive the peristaltic pump 64. The outlet of the peristaltic pump 64 is connected with the medicine storage tank 4. The medicine storage tank 4 can be automatically inflated under the action of the peristaltic pump 64 when the wheelchair travels, so that certain air pressure is always kept in the medicine storage tank 4.

The peristaltic pump 64 is provided with a slide rail 68, the slide rail 68 runs parallel to the wheel shaft 66, and the peristaltic pump 64 is provided with a structure matched with the slide rail 68, so that the peristaltic pump 64 can slide along the slide rail 68 in the inward and outward directions. An air cylinder 69 is arranged on the outer side of the peristaltic pump 64, the inner cavity of the air cylinder 69 is communicated with the medicine storage tank 4, and a fifth spring 67 is arranged on the outer side of the peristaltic pump 64. Peristaltic pump 64 is urged outwardly by the action of a five-gauge spring 67 so that clutch 15 can be engaged.

When the wheelchair travels, the peristaltic pump 64 is driven to rotate through the wheel shaft 66, the peristaltic pump 64 inflates the medicine storage tank 4, the air pressure of the air in the medicine storage tank 4 rises along with the rise of the air pressure, when the air pressure rises to a certain value, the driving air cylinder 69 extends, the elastic force of the five-spring 67 is overcome through the action of the air cylinder 69 to push the peristaltic pump 64 to the inner side direction, so that the wheel shaft 66 is separated from the main shaft of the peristaltic pump 64, the load on the wheel shaft 9 is reduced, and the wheelchair is pushed to save more labor.

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims

1. A wheelchair for autonomous drug delivery of a physically infirm patient, comprising: comprises a wheelchair body and a drug administration assembly; the wheelchair body comprises a seat, armrests, a backrest, a headrest, side baffles and wheels; the drug delivery assembly comprises a drug delivery device, a control box, a hand brake, a drug storage tank, a pressure tank, a time delay valve and a reversing valve; the headrest is positioned above the backrest, the lower end of the headrest is hinged with the upper end of the backrest, a torsion spring is arranged at the hinged position, and the headrest is provided with an acting force tending to be vertical through the elastic action of the torsion spring; the left side and the right side of the front side of the headrest are respectively provided with a side stop, the side stops are hinged with the headrest, the hinged positions are provided with torsion springs, and the torsion springs apply acting force to the side stops to deflect towards the middle direction through the acting force of the torsion springs; the drug delivery device main body is of an n-shaped rod-shaped or n-shaped hollow tubular structure, two ends of the drug delivery device are respectively positioned at two sides of the headrest, the upper end of the drug delivery device main body is positioned above the headrest, two ends of the drug delivery device main body are hinged with the upper end of the backrest, a torsion spring is arranged at the hinged position, and acting force of the drug delivery device for deflecting backwards is given under the action of the torsion spring; the left, middle and right directions of the medicine feeder are respectively provided with an atomizing nozzle; the control box is positioned at one end of the medicine feeder and comprises a lever, an upright post, a base, a fixed block and a first spring, the middle position of the lever is hinged with the front end of the upright post, the outer end of the lever is positioned behind the end part of the medicine feeder, the inner end of the lever is fixedly connected with a piston pump, and the piston pump is positioned behind the side edge of the headrest; the base is positioned on the box wall of the control box, mutually adaptive sliding rail and sliding groove structures are respectively arranged between the base and the box wall, and the base can slide on the box wall along the inner and outer directions through the sliding rail and sliding groove structures; the hand brake is positioned below the outer side of the wheelchair armrest and is connected with the brake wire; the other end of the brake cable is positioned at the control box, the outer side wall of the control box is provided with a hole for the brake cable core wire to pass through, the brake cable sheath is blocked at the outer side of the hole, and the brake cable core wire end is fixed on the base; the fixed block is positioned in the inner side direction of the base, the fixed block is fixedly connected with the box wall, and the fixed block is connected with the base through a first spring; the medicine storage tank is used for storing medicine liquid, compressed air is injected into the medicine storage tank, and the compressed air provides power for the medicine to be sprayed out; the medicine storage tank is connected with a delay valve through a medicine pipe, and the delay valve comprises a cylinder body and a linkage valve; the linkage valve is characterized in that a medicine inlet of the linkage valve is connected with a medicine storage tank through a medicine pipe, an upper piston and a lower piston are arranged in the cylinder body, the upper piston is connected with the linkage valve through a vertical rod, the upper piston is connected with the lower piston through a second spring, the upper piston and the lower piston jointly divide the cylinder body into an upper cavity, a middle cavity and a lower cavity, the upper piston and the lower piston are respectively provided with a vertical pore, two adjacent cavities are connected through the vertical pore, and the lower cavity and the middle cavity are respectively provided with an opening; the piston pump comprises a shell and a piston, the piston moves in the shell in the front-back direction, a piston rod fixedly connected with the piston is arranged in front of the piston, the front end of the piston rod penetrates through a hole in the front wall of the shell and is exposed out of the shell, and a third spring is arranged behind the piston; the rear end of the shell is provided with an opening, and the opening at the rear end of the shell is connected with the opening of the lower cavity of the cylinder body through an air pipe; the reversing valve comprises a valve body and a valve core, wherein the valve body is of a cylindrical structure, the valve core is positioned in a middle cavity of the valve body, the valve core is of a stepped shaft structure and comprises two thick sections and three thin sections according to the sequence of thin-thick-thin, and a seal is formed between the thick sections and the valve body; the valve body is provided with two inlets and three outlets, the two inlets are connected with a medicine outlet of the linkage valve through medicine pipes, the three inlets are a first inlet, a second inlet and a third inlet from left to right in sequence, and the first to third inlets are respectively connected with atomizing nozzles in the left, middle and right directions on the medicine feeder through the medicine pipes; on the axial position of the reversing valve, two inlets are respectively positioned between the first port and the second port and between the second port and the third port; in a natural state, the two inlets and the second port are positioned at the thin section in the middle of the valve core, and the first port and the third port are respectively positioned at the two thick sections of the valve core; the thin sections at the two sides of the two ends of the valve core are respectively provided with a return spring, and the valve core can be reset under the action of the return springs when the valve core is not subjected to other external forces; the headrest comprises a headrest, side baffles, a sliding block, a connecting rod, a sliding block and side baffles, wherein the side baffles are arranged on the headrest, the two sides of the headrest are respectively provided with a strip-shaped hole in the left-right direction at the outer side of the side baffles, the strip-shaped hole penetrates through the I-shaped sliding block, the width of the end parts of the front end and the rear end of the sliding block in the vertical direction is larger than that of the strip-shaped hole, so that the sliding block can slide left and right along the strip-shaped hole, the sliding; the slide block is connected with one end of the reversing valve core close to the slide block through a rope; the lengths of the two ropes are satisfied, and when the valve core moves outwards to a half distance, the ropes are straightened; a constant pressure valve is connected between the pressure tank and the medicine storage tank; compressed air with the pressure higher than that of the medicine storage tank is injected into the pressure tank; the constant pressure valve comprises a valve shell and a core body; a central hole penetrating through the two ends is formed in the middle of the valve shell, and an air outlet is formed at one end of the central hole; the air outlet is connected with the medicine storage tank; the core body is positioned in the central hole, a fourth spring is arranged between the front end of the core body and the front end of the central hole, and the core body is pushed backwards under the action of the fourth spring; the side wall and the rear end of the core body are respectively provided with an opening, and the two openings are communicated through a hole in the core body; three sealing rings are arranged between the side wall of the central hole and the side wall of the core body, and a first sealing ring, a second sealing ring and a third sealing ring are sequentially arranged from front to back; in a natural state, the opening on the side wall of the core body is positioned between the first sealing ring and the second sealing ring; the position that is located between No. two sealing washers and No. three sealing washers on the centre bore lateral wall is equipped with the opening, and the air inlet of constant pressure valve is connected to this opening, and the air inlet of constant pressure valve is connected the overhead tank.