Wheelchair with family member accompanying function

Abstract

The invention relates to the technical field of medical instruments, in particular to a wheelchair with a family member accompanying function, which comprises a wheelchair main body and a side pull type family member chair, an accommodating cavity is formed in a seat structure of the wheelchair main body; the opening position of the accommodating cavity is formed in one side of the chair seat structure; the side-pulling type family member chair is arranged in the accommodating cavity in a sliding manner; and a foldable supporting rod is arranged at the lower part of the outer side end of the side-pulling type family member chair. According to the wheelchair with the accompanying function, by additionally arranging the foldable side-pulling type family member chair, traveling is facilitated, and a rest place is provided for accompanying family members or nursing personnel. And meanwhile, the added side-pulling type family member chair can play a role in braking the walking wheels after being unfolded, so that the stability when the patient and the family members sit at the same time is ensured. Moreover, the side-pulling type family member chair is pulled out in the side direction and can be arranged side by side with the wheelchair, the design of the side-by-side seats facilitates emotional interaction between the patient and the family members, and the humanistic care of emotional is reflected better.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a wheelchair with a family companionship function. Background Art

[0002] Traditional wheelchairs are designed with only one seat, so patients need to sit alone for a long time, and family members or caregivers need to walk with them. This has the following drawbacks: Family members consume a lot of physical energy, especially when moving long distances, and they are prone to fatigue; Patients and their families lack empathetic interaction and psychological support; The accompanying items need to be carried separately, which is inconvenient.

[0003] Traditional wheelchairs can only seat one person, and family members can only follow. Walking for a long time can easily cause fatigue and affect interaction.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a wheelchair with family companionship function to solve the technical problems existing in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a wheelchair with a companion function, which includes: a wheelchair main body and a side-pull family chair; the wheelchair main body is provided with a accommodating cavity in its seat structure; the opening position of the accommodating cavity is set on one side of the seat structure; the side-pull family chair can be slidably installed in the accommodating cavity; the lower part of the outer end of the side-pull family chair is provided with a foldable support rod; the foldable support rod can be supported on the ground after being unfolded; the running wheels of the wheelchair main body are three-blade wheels, and the side-pull family chair passes through the spoke gap of the running wheels when extended, and can be clamped on the running wheels for braking and limiting.

[0007] Preferably, the side-pull family chair includes: a chair plate and a foldable support rod; the width of the chair plate matches the accommodating cavity; the foldable support rod is rotatably mounted on the lower surface of the chair plate; and a hollow through groove is provided at the front end of the chair plate.

[0008] Preferably, a through groove is provided from top to bottom at the front end of the chair plate, and the upper surface of the through groove has a smooth slope to facilitate pulling back and protect fingers.

[0009] In addition, in order to facilitate the pulling out of the side-pull family chair in the initial position, two hand holes can be provided on the front end surface of the chair plate, namely, a first hand hole and a second hand hole; The first hand hole and the second hand hole are shaped like trumpets, and the two are connected to each other.

[0010] Preferably, a circular embedding groove is provided on the upper surface of the chair plate, and a embedding groove filling body is provided on the embedding groove. After removing the embedding groove filling body, some daily necessities, such as water cups, etc., can be placed in the embedding groove.

[0011] More preferably, a detachable square buckle pad is provided on the upper surface of the chair plate, and the square buckle pad is double-sided, one side of which is a sponge pad for people to use, and the other side is a chessboard for people to entertain.

[0012] Preferably, the foldable support rod is a U-shaped support rod, and the upper end of the U-shaped support rod is a hinge joint, and the hinge joint is connected to the installation position of the side-pull family chair.

[0013] Preferably, the hinge joint is a T-shaped structure having a transverse through-hole, a pivot being provided in the through-hole, and both ends of the pivot being respectively installed in the installation positions.

[0014] Preferably, a vertical surface is provided on the outer side of the T-shaped structure, and the vertical surface can abut against the installation position when at the extreme position of rotation to prevent deviation.

[0015] In order to support the ground more stably, a number of liftable adjustment feet are provided at the bottom of the U-shaped support pole. Each adjustment foot can be lifted and installed on the bottom cross bar of the U-shaped support pole (preferably threaded connection) to adapt to uneven ground.

[0016] Preferably, the lower surface of the side-pull family chair is provided with a U-shaped groove for accommodating a U-shaped support rod, and the U-shaped support rod is received in the U-shaped groove so that the side-pull family chair can slide freely in the accommodating cavity.

[0017] Preferably, the seat structure of the wheelchair main body includes: a wheelchair frame, a wheelchair seat, a wheelchair backrest, a wheel assembly and a foot pedal; the side of the wheelchair seat is formed with an opening and is provided with a accommodating cavity; the wheelchair seat is installed on the wheelchair frame; the upper surface of the wheelchair seat is provided with a seat surface, the two sides of the wheelchair seat are provided with baffles, and the upper part of the baffle is provided with armrests, and the wheelchair backrest is rotatably installed on the armrests on both sides of the wheelchair seat; the wheel assembly is installed on the wheelchair frame, and the foot pedal is installed at the bottom of the wheelchair frame.

[0018] Preferably, the wheelchair frame comprises: a bottom bracket and an upper bracket; a foot pedal is mounted on the bottom bracket, the upper end of the bottom bracket is mounted on the lower surface of the carrying box, and the upper bracket is mounted between the carrying box and the wheelchair seat.

[0019] Preferably, the bottom bracket comprises: a first L-shaped bracket and a second L-shaped bracket; The first L-shaped bracket and the second L-shaped bracket are both closed rigid support rod structures; the upper cross bar of the first L-shaped bracket is fixedly connected to the carrying box, and two casters are provided on the front side of the lower end of the first L-shaped bracket; the upper cross bar of the second L-shaped bracket is fixedly connected to the carrying box, and two casters are provided on the rear side of the lower end of the second L-shaped bracket; the longitudinal cross bars of the first L-shaped bracket and the second L-shaped bracket are abutted against each other and are symmetrically arranged.

[0020] Preferably, the foot pedal comprises: a front pedal and a rear balance board; the front pedal is mounted on the first L-shaped bracket; and the rear balance board is mounted on the second L-shaped bracket.

[0021] Preferably, the carrying box is equipped with a wheel transmission mechanism, and wheel assemblies are respectively installed at both ends of the wheel transmission mechanism.

[0022] Preferably, the wheel assembly is divided into two groups, each group includes: a running wheel installed on the wheel transmission mechanism and a hand push ring that rotates synchronously with the running wheel; the running wheel is a three-blade wheel, and the side-pull family chair passes through the spoke gap of the running wheel when extended, and can be engaged with the running wheel for braking and limiting.

[0023] By adopting the above technical solution, the present invention has the following beneficial effects: The wheelchair with companionship function provided by the present invention features a retractable side-pull family chair, making travel more convenient and providing a resting area for accompanying family members or caregivers. Furthermore, the added side-pull family chair, when deployed, acts as a brake on the running wheels, ensuring stability when the patient and family members are seated simultaneously. Furthermore, the side-pull family chair is pulled out laterally and can be placed side by side with the wheelchair. This side-by-side seating design facilitates emotional interaction between the patient and family members, further embodying emotional and humanistic care. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1A three-dimensional diagram of a wheelchair provided in an embodiment of the present invention; Figure 2 A bottom view of a wheelchair provided in an embodiment of the present invention; Figure 3 A front view of a wheelchair provided in an embodiment of the present invention; Figure 4 A side view of a wheelchair provided in an embodiment of the present invention; Figure 5 A diagram of the wheelchair usage status provided by an embodiment of the present invention; Icons: 1-wheelchair backrest; 2-push handle; 3-U-shaped backrest connector; 4-first hinged seat; 5-travel wheel; 6-hand push ring; 7-seat board; 8-through slot; 9-foldable support rod; 10-side-pull family chair; 11-baffle; 12-wheelchair seat board; 13-armrest; 14-; 15-front pedal; 16-carrying box; 17-rear balance board; 18-bottom bracket; 19-upper bracket; 20-wheelchair frame; 21-U-shaped slot. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example 1

[0027] Combine Figures 1 to 5 As shown, this embodiment provides a wheelchair with a companion function, which includes: a wheelchair body and a side-pull family chair 10; the wheelchair body is provided with a storage cavity in its seat structure; the opening position of the storage cavity is provided on one side of the seat structure; the side-pull family chair 10 is slidably installed in the storage cavity; the lower part of the outer end of the side-pull family chair 10 is provided with a foldable support rod 9; the foldable support rod 9 can be supported on the ground after being unfolded; the running wheels 5 of the wheelchair body are three-blade wheels, and the side-pull family chair 10 passes through the spoke gap of the running wheels 5 when extended, and can be clamped on the running wheels 5 for braking and limiting. This embodiment facilitates travel by adding a retractable side-pull family chair 10, providing a resting place for accompanying family members or caregivers. At the same time, the added side-pull family chair 10 can brake the running wheels 5 after being unfolded, ensuring stability when the patient and family members sit at the same time. Moreover, the side-pull family chair 10 is pulled out sideways and can be set side by side with the wheelchair. This side-by-side seating design facilitates emotional interaction between the patient and the family, and better reflects emotional humanistic care.

[0028] In this embodiment, preferably, the side-pull family chair 10 includes: a chair plate 7 and a foldable support rod 9; the width of the chair plate 7 matches the accommodating cavity; the foldable support rod 9 is rotatably mounted on the lower surface of the chair plate 7; and a hollow through groove 8 is provided at the front end of the chair plate 7.

[0029] In this embodiment, preferably, a through slot 8 is provided from top to bottom at the front end of the chair plate 7, and the upper surface of the through slot 8 has a smooth slope to facilitate pulling back and protect fingers.

[0030] In addition, in order to facilitate the pulling-out action of the side-pull family chair 10 in the initial position, two hand holes can be provided on the front end surface of the chair panel 7, namely, the first hand hole and the second hand hole; wherein, the interior of the first hand hole and the second hand hole are trumpet-shaped, and the two are connected to each other.

[0031] In this embodiment, preferably, a groove is provided on the upper surface of the chair plate 7. The groove is circular and a groove filling body is provided on it. After removing the groove filling body, some daily necessities, such as water cups, etc., can be placed in the groove to serve as a temporary fixation.

[0032] In this embodiment, a removable square buckle pad is preferably provided on the upper surface of the chair plate 7. This double-sided pad is used, with one side being a sponge pad for use and the other being a chessboard for entertainment. Specifically, the upper surface of the chair plate 7 is shaped like a rectangular hollow groove, with a circle of raised ridges along the inner edge of the hollow groove. A rectangular cover, i.e., the square buckle pad, is placed above the raised ridges.

[0033] In this embodiment, preferably, the foldable support rod 9 is a U-shaped support rod, and the upper end of the U-shaped support rod is a hinge joint, which is connected to the installation position of the side-pull family chair 10.

[0034] In this embodiment, preferably, the hinge joint is a T-shaped structure having a transverse through-hole, a pivot being provided in the through-hole, and both ends of the pivot being respectively installed in the installation positions.

[0035] In this embodiment, preferably, a vertical surface is provided on the outer side of the T-shaped structure, and the vertical surface can abut against the installation position when at the extreme position of rotation to prevent deviation.

[0036] In order to support the ground more stably, a number of liftable adjustment feet are provided at the bottom of the U-shaped support pole. Each adjustment foot can be lifted and installed on the bottom cross bar of the U-shaped support pole (preferably threaded connection) to adapt to uneven ground.

[0037] In this embodiment, preferably, the lower surface of the side-pull family chair 10 is provided with a U-shaped groove 21 for accommodating a U-shaped support rod, and the U-shaped support rod is received in the U-shaped groove 21 so that the side-pull family chair 10 can slide freely in the accommodating cavity.

[0038] In this embodiment, preferably, the seat structure of the wheelchair main body includes: a wheelchair frame 20, a wheelchair seat plate 12, a wheelchair backrest 1, a wheel assembly and a foot pedal; an opening is formed on the side of the wheelchair seat plate 12 and is provided with a accommodating cavity; the wheelchair seat plate 12 is installed on the wheelchair frame 20; the upper surface of the wheelchair seat plate 12 is provided with a seat surface, and the wheelchair seat plate 12 has baffles 11 on both sides, and armrests 13 above the baffle 11, and the wheelchair backrest 1 is rotatably installed on the armrests 13 on both sides of the wheelchair seat plate 12; the wheel assembly is installed on the wheelchair frame 20, and the foot pedal is installed at the bottom of the wheelchair frame 20.

[0039] In this embodiment, preferably, the wheelchair frame 20 includes: a bottom bracket 18 and an upper bracket; a foot pedal is installed on the bottom bracket 18, the upper end of the bottom bracket 18 is installed on the lower surface of the carrying box 16, and the upper bracket is installed between the carrying box 16 and the wheelchair seat 12.

[0040] In this embodiment, preferably, the bottom bracket 18 includes: a first L-shaped bracket and a second L-shaped bracket; the first L-shaped bracket and the second L-shaped bracket are both closed rigid support rod structures; the upper end cross bar of the first L-shaped bracket is fixedly connected to the carrying box 16, and two casters are provided on the front side of the lower end of the first L-shaped bracket, the upper end cross bar of the second L-shaped bracket is fixedly connected to the carrying box 16, and two casters are provided on the rear side of the lower end of the second L-shaped bracket, and the longitudinal cross bars of the first L-shaped bracket and the second L-shaped bracket are abutted against each other and are symmetrically arranged.

[0041] In this embodiment, preferably, the foot pedal includes: a front pedal 15 and a rear balance board 17; the front pedal 15 is mounted on a first L-shaped bracket; and the rear balance board 17 is mounted on a second L-shaped bracket.

[0042] In this embodiment, a rear balance board 17 is added, so that the carrying box 16 , the first L-shaped bracket, the second L-shaped bracket, the front pedal 15 and the rear balance board 17 form an I-shape as a whole.

[0043] In this embodiment, preferably, the carrying box 16 is equipped with a wheel transmission mechanism, and wheel assemblies are respectively installed at both ends of the wheel transmission mechanism. A gap is left between the carrying box 16 and the wheelchair seat plate 12.

[0044] In this embodiment, preferably, the wheel assembly is divided into two groups, each group includes: a traveling wheel 5 installed on the wheel transmission mechanism and a hand push ring 6 that rotates synchronously with the traveling wheel 5; the traveling wheel 5 is a three-blade wheel, and the side-pull family chair 10 passes through the spoke gap of the traveling wheel 5 when extended, and can be engaged with the traveling wheel 5 for braking and limiting. Example 2

[0045] The second embodiment is a further improvement on the above-mentioned first embodiment. The second embodiment is mainly designed for the specific structure of the wheelchair body. The second embodiment provides a wheelchair with a companion function, which includes: a wheelchair body and a side-pull family chair 10. The seat structure of the wheelchair body includes: a wheelchair frame 20, a wheelchair seat plate 12, a wheelchair backrest 1, a wheel assembly and a footrest; the side of the wheelchair seat plate 12 is formed with an opening and provided with a accommodating cavity; the wheelchair seat plate 12 is installed on the wheelchair frame 20; the upper surface of the wheelchair seat plate 12 is provided with a seat surface, and the wheelchair seat plate 12 has baffles 11 on both sides, and armrests 13 above the baffles 11, and the wheelchair backrest 1 is rotatably installed on the armrests 13 on both sides of the wheelchair seat plate 12; the wheel assembly is installed on the wheelchair frame 20, and the footrest is installed at the bottom of the wheelchair frame 20. The wheelchair's seat structure includes a storage cavity, which opens to one side of the seat structure. A side-pull family chair 10 is slidably mounted within the cavity. A foldable support rod 9 is located at the lower outer end of the side-pull family chair 10, which can be supported on the ground when deployed. The wheelchair's running wheels 5 are three-blade wheels. When extended, the side-pull family chair 10 passes through the spokes of the running wheels 5 and engages with the running wheels 5 to provide a brake. This embodiment facilitates travel by adding a retractable side-pull family chair 10, providing a resting area for accompanying family members or caregivers. Furthermore, the added side-pull family chair 10, when deployed, acts as a brake on the running wheels 5, ensuring stability when the patient and family members are seated simultaneously. Furthermore, the side-pull family chair 10 is designed to be pulled out laterally and can be placed side by side with the wheelchair. This side-by-side seating design facilitates emotional interaction between the patient and family members, further embodying emotional care.

[0046] The first improvement is the installation method of the wheelchair backrest 1. The rear end of the left armrest 13 has a first hinge seat 4, and the rear end of the right armrest 13 has a second hinge seat. One end of the U-shaped backrest connector 3 is connected to the first hinge seat 4, and the other end of the U-shaped backrest connector 3 is connected to the second hinge seat. The U-shaped backrest connector 3 can rotate relative to the hinge seat. This U-shaped backrest connector 3 is directly fixed to the rear surface of the wheelchair backrest 1. Of course, to achieve a limited position after rotation, it can be designed that after the wheelchair backrest 1 is rotated into place, the lower end corner of the wheelchair backrest 1 can abut and lock with the rear end of the armrest 13 to achieve a basic fixing effect. That is to say, the cross-section of the wheelchair backrest 1 is also U-shaped, and an arm plate is provided on each side thereof, which is in the same plane as the armrest 13. The arm plate on the left is in the same plane as the baffle 11 on the left, and the lower end is lower than the baffle 11 on the left. After the wheelchair backrest 1 is rotated into place, the lower end of the arm plate can rest on the side edge of the baffle 11 on the left to fix the position.

[0047] The second improvement is that there are push handles 2 on both sides of the wheelchair backrest 1. The push handles 2 can be foldable as shown in the figure, or fixed.

[0048] The third improvement: There are two side-pull family chairs 10, one for the left side and one for the right side. The left and right side-pull family chairs 10 and 10 each include a seat panel 7 and a foldable support rod 9. The width of the seat panel 7 matches the accommodating cavity. The foldable support rod 9 is rotatably mounted on the lower surface of the seat panel 7. A hollow through-slot 8 is provided at the front end of the seat panel 7. In this embodiment, preferably, a through-slot 8 is provided from top to bottom at the front end of the seat panel 7. The upper surface of the through-slot 8 has a smooth slope to facilitate pulling back and protect fingers.

[0049] In addition, in order to facilitate the pulling-out action of the side-pull family chair 10 in the initial position, two hand holes can be provided on the front end surface of the chair panel 7, namely, the first hand hole and the second hand hole; wherein, the interior of the first hand hole and the second hand hole are trumpet-shaped, and the two are connected to each other.

[0050] In this embodiment, preferably, a groove is provided on the upper surface of the chair plate 7. The groove is circular and a groove filling body is provided on it. After removing the groove filling body, some daily necessities, such as water cups, etc., can be placed in the groove to serve as a temporary fixation.

[0051] In this embodiment, a removable square buckle pad is preferably provided on the upper surface of the chair plate 7. This double-sided pad is used, with one side being a sponge pad for use and the other being a chessboard for entertainment. Specifically, the upper surface of the chair plate 7 is shaped like a rectangular hollow groove, with a circle of raised ridges along the inner edge of the hollow groove. A rectangular cover, i.e., the square buckle pad, is placed above the raised ridges.

[0052] The fourth improvement: a ventilated gap is formed between the wheelchair backrest 1 and the wheelchair seat plate 12, which is conducive to ventilation.

[0053] In this embodiment, preferably, the foldable support rod 9 is a U-shaped support rod, and the upper end of the U-shaped support rod is a hinge joint, which is connected to the installation position of the side-pull family chair 10.

[0054] In this embodiment, preferably, the hinge joint is a T-shaped structure having a transverse through-hole, a pivot being provided in the through-hole, and both ends of the pivot being respectively installed in the installation positions.

[0055] In this embodiment, preferably, a vertical surface is provided on the outer side of the T-shaped structure, and the vertical surface can abut against the installation position when at the extreme position of rotation to prevent deviation.

[0056] In order to support the ground more stably, a number of liftable adjustment feet are provided at the bottom of the U-shaped support pole. Each adjustment foot can be lifted and installed on the bottom cross bar of the U-shaped support pole (preferably threaded connection) to adapt to uneven ground.

[0057] In this embodiment, preferably, the lower surface of the side-pull family chair 10 is provided with a U-shaped groove 21 for accommodating a U-shaped support rod, and the U-shaped support rod is received in the U-shaped groove 21 so that the side-pull family chair 10 can slide freely in the accommodating cavity.

[0058] In this embodiment, preferably, the wheelchair frame 20 includes: a bottom bracket 18 and an upper bracket; a foot pedal is installed on the bottom bracket 18, the upper end of the bottom bracket 18 is installed on the lower surface of the carrying box 16, and the upper bracket is installed between the carrying box 16 and the wheelchair seat 12.

[0059] In this embodiment, preferably, the bottom bracket 18 includes: a first L-shaped bracket and a second L-shaped bracket; the first L-shaped bracket and the second L-shaped bracket are both closed rigid support rod structures; the upper end cross bar of the first L-shaped bracket is fixedly connected to the carrying box 16, and two casters are provided on the front side of the lower end of the first L-shaped bracket, the upper end cross bar of the second L-shaped bracket is fixedly connected to the carrying box 16, and two casters are provided on the rear side of the lower end of the second L-shaped bracket, and the longitudinal cross bars of the first L-shaped bracket and the second L-shaped bracket are abutted against each other and are symmetrically arranged.

[0060] In this embodiment, preferably, the foot pedal includes: a front pedal 15 and a rear balance board 17; the front pedal 15 is mounted on a first L-shaped bracket; and the rear balance board 17 is mounted on a second L-shaped bracket.

[0061] In this embodiment, a rear balance board 17 is added, so that the carrying box 16 , the first L-shaped bracket, the second L-shaped bracket, the front pedal 15 and the rear balance board 17 form an I-shape as a whole.

[0062] In this embodiment, preferably, the carrying box 16 is equipped with a wheel transmission mechanism, and wheel assemblies are respectively installed at both ends of the wheel transmission mechanism. A gap is left between the carrying box 16 and the wheelchair seat plate 12.

[0063] In this embodiment, preferably, the wheel assembly is divided into two groups, each group includes: a traveling wheel 5 installed on the wheel transmission mechanism and a hand push ring 6 that rotates synchronously with the traveling wheel 5; the traveling wheel 5 is a three-blade wheel, and the side-pull family chair 10 passes through the spoke gap of the traveling wheel 5 when extended, and can be engaged with the traveling wheel 5 for braking and limiting.

[0064] The fifth improvement is that the upper bracket is installed between the carrying box 16 and the wheelchair seat 12, so that a storage layer is formed between the carrying box 16 and the wheelchair seat 12. The storage layer serves as a gap for storage, providing more storage space for the wheelchair with companion function.

[0065] In this embodiment, the carrying case 16 is equipped with a wheel transmission mechanism, with wheel assemblies mounted at each end. The wheel transmission mechanism can be a conventional wheel transmission structure for hand-cranked wheelchairs, or it can adopt the following structure: the wheel transmission mechanism comprises a first speed control unit and a second speed control unit. The first speed control unit corresponds to the left wheel assembly, and the second speed control unit corresponds to the right wheel assembly. Both the first and second speed control units comprise a drive wheel, a transmission shaft, a driven wheel, a spring, a transmission belt, and a chain drive assembly. The drive wheel is mounted on the corresponding drive shaft; the driven wheel is mounted on the transmission shaft, which is supported within the carrying case 16. The drive shaft is mounted on the side wall of the carrying case 16 via bearings and is connected to the running wheel 5. The drive wheel and driven wheel have the same structure, each comprising two tapered single-sided wheels. The two tapered single-sided wheels are spaced apart from each other, and their facing surfaces are both frustoconical. The spacing between the two tapered single-sided wheels is adjustable. One of the tapered single-sided wheels is fixed to the drive shaft or transmission shaft, while the other forms a sliding pair with the drive shaft or transmission shaft. A drive belt connects the drive and driven wheels; for both, the belt rests on the circular surfaces of two tapered, single-sided wheels, enabling infinite speed regulation. The sliding tapered single-sided wheels are located on opposite sides of the drive and driven wheels. Because these sliding tapered single-sided wheels are on opposite sides, the belt automatically aligns when the transmission ratio changes. A spring is mounted on the drive shaft; one end of the spring is fixed to the drive shaft, while the other end rests against the outer surface of the sliding tapered single-sided wheel in the drive wheel. The spring applies a spring force to the sliding tapered single-sided wheel in the drive wheel, causing the two tapered single-sided wheels to decrease in distance. Example 3

[0066] The third embodiment is a further improvement on the first embodiment. The second embodiment is mainly designed with respect to the specific structure of the wheelchair body.

[0067] A clamp is provided on the rear side of the wheelchair backrest 1; an infusion stand is detachably mounted on the clamp. The bottom of the infusion stand has a movable tripod leg frame, which is equipped with universal wheels with brakes for easy movement and fixation. An infusion heating alarm device is installed on the top hook of the infusion stand. The device specifically comprises a gantry hanger; the gantry hanger is a mouth-shaped frame structure, with a hanging ear with a circular through hole at the top of the gantry hanger for connecting to the hook at the top of the infusion stand; the gantry hanger has a gravity detection module located directly below the hanging ear. The gravity detection module is located at the top of the mouth-shaped frame structure and is designed with a hook for hanging an infusion bottle and detecting the remaining liquid in the infusion bottle in real time. A circle of LED display modules is arranged on the sides and top of the gantry hanger. The LED display module displays the remaining infusion amount using an LED color bar. Using the principle of gravity, the LED color bar indicates the infusion progress of the liquid, with the remaining amount displayed in blue and the amount completely filled displayed in red. When the remaining amount falls below 50g, a buzzer sounds and alerts the nurse station. This feature allows patients to easily monitor their infusion progress during nighttime infusions. The bottom of the gantry hanger features a slot for the infusion tube, which is equipped with a PTC heater. This heater maintains the infusion liquid at a constant temperature of approximately 37°C, alleviating patient discomfort and other symptoms.

[0068] The gravity detection module, LED display module, buzzer, PTC heater, and communication module are integrated on a PCB. Details are as follows: In this embodiment, the gravity detection module (automatic infusion alarm + LED color bar display) uses a high-precision strain-gauge gravity sensor (range 0-2kg, accuracy ±0.1g), mounted on a hook at the bottom of the device, to directly measure the total weight of the infusion bottle and liquid. The sensor output is connected to a 24-bit ADC chip (such as the HX711) to convert the analog signal into a digital signal with a resolution of 0.0001g, meeting the 50g threshold detection requirement.

[0069] In this embodiment, the LED color bar display logic consists of 10 RGB LEDs arranged on the front of the device, using PWM dimming to achieve color gradients. The color mapping rules are: remaining weight ≥ 50g: blue (RGB: 0, 0, 255); remaining weight < 50g: red (RGB: 255, 0, 0); transition range (e.g., 50-100g): purple (RGB: 128, 0, 255). RGB values ​​are calculated using linear interpolation. The driver circuit utilizes a WS2812B LED driver chip, supporting cascade control and reducing I / O port usage.

[0070] In this embodiment, the buzzer alarm trigger mechanism is: when the ADC detects that the weight is less than 50g, the MCU (such as STM32F103) controls the red LED to flash (frequency 2Hz) through the GPIO port, and at the same time triggers the communication module to send an alarm signal.

[0071] In this embodiment, the heating structure of the heating control module (PTC constant temperature heating) is as follows: a PTC heating plate (rated power 10W, constant temperature 37°C ± 1°C) is embedded in the inner wall of a silicone card slot, the size of which is adapted to a standard infusion tube (outer diameter 4mm). Thermal grease is laid between the heating plate and the infusion tube to reduce thermal resistance and improve efficiency. Temperature control circuit: An NTC thermistor (10kΩ @ 25°C) is attached to the surface of the heating plate to monitor the temperature in real time. PID control algorithm: The MCU dynamically adjusts the PTC heating power (controlled by PWM duty cycle) based on the NTC feedback value to achieve rapid temperature rise and steady-state maintenance. Overtemperature protection: When the temperature exceeds 40°C, the heating power is automatically cut off. No-load detection: If there is no infusion tube in the card slot, the heating plate will not start.

[0072] In this embodiment, the communication module (nurse station alarm) uses a wireless solution: a LoRa wireless module (such as the SX1278) with a transmission range of up to 1 km (enough for hospital ward coverage) and low power consumption (standby current < 2 μA). The data format is a JSON package containing the device ID, remaining weight, and alarm status.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wheelchair with a companion function, characterized in that: include: Wheelchair body and side-pull family chair; The wheelchair body is provided with a receiving cavity in its seat structure; The opening of the accommodating cavity is arranged on one side of the seat structure; The side-pull family chair is slidably installed in the accommodating cavity; The side-pull family chair has a foldable support rod at the lower part of the outer end; The foldable support rod can be supported on the ground after being unfolded; The running wheels of the wheelchair body are three-blade wheels. When the side-pull family chair is extended, it passes through the spoke gaps of the running wheels and can be clamped on the running wheels for braking and limiting.

2. The wheelchair with companion function according to claim 1, characterized in that: The side-pull family chair comprises a chair plate and a foldable support rod; The width of the chair plate matches the accommodating cavity; The foldable support rod is rotatably mounted on the lower surface of the chair plate; The front end of the chair plate is provided with a hollow through groove.

3. The wheelchair with companion function according to claim 1, characterized in that: The foldable support rod is a U-shaped support rod, and the upper end of the U-shaped support rod is a hinge joint, and the hinge joint is connected to the installation position of the side-pull family chair.

4. The wheelchair with companion function according to claim 3, characterized in that: The lower surface of the side-pull family chair is provided with a U-shaped groove for accommodating a U-shaped support rod, and the U-shaped support rod is received in the U-shaped groove so that the side-pull family chair can slide freely in the accommodating cavity.

5. The wheelchair with companion function according to claim 3, characterized in that: The seat structure of the wheelchair main body includes: a wheelchair frame, a wheelchair seat, a wheelchair backrest, a wheel assembly and a foot pedal; the side of the wheelchair seat is formed with an opening and is provided with a accommodating cavity; the wheelchair seat is installed on the wheelchair frame; the upper surface of the wheelchair seat is provided with a seat surface, the two sides of the wheelchair seat are provided with baffles, and the upper part of the baffle is provided with armrests, and the wheelchair backrest is rotatably installed on the armrests on both sides of the wheelchair seat; the wheel assembly is installed on the wheelchair frame, and the foot pedal is installed at the bottom of the wheelchair frame.

6. The wheelchair with companion function according to claim 3, characterized in that: The wheelchair frame includes a bottom bracket and an upper bracket; a foot pedal is installed on the bottom bracket, the upper end of the bottom bracket is installed on the lower surface of the carrying box, and the upper bracket is installed between the carrying box and the wheelchair seat.

7. The wheelchair with companion function according to claim 6, characterized in that: The bottom bracket includes: a first L-shaped bracket and a second L-shaped bracket; The first L-shaped bracket and the second L-shaped bracket are both closed rigid support rod structures; the upper cross bar of the first L-shaped bracket is fixedly connected to the carrying box, and two casters are provided on the front side of the lower end of the first L-shaped bracket; the upper cross bar of the second L-shaped bracket is fixedly connected to the carrying box, and two casters are provided on the rear side of the lower end of the second L-shaped bracket; the longitudinal cross bars of the first L-shaped bracket and the second L-shaped bracket are abutted against each other and are symmetrically arranged.

8. The wheelchair with companion function according to claim 6, characterized in that: The foot pedal includes: a front pedal and a rear balance board; the front pedal is installed on the first L-shaped bracket; the rear balance board is installed on the second L-shaped bracket.

9. The wheelchair with companion function according to claim 8, characterized in that: The carrying box is equipped with a wheel transmission mechanism, and wheel assemblies are respectively installed at both ends of the wheel transmission mechanism.

10. The wheelchair with companion function according to claim 9, characterized in that: The wheel assembly is divided into two groups, each group includes: a running wheel installed on the wheel transmission mechanism and a hand push ring that rotates synchronously with the running wheel; the running wheel is a three-blade wheel, and the side-pull family chair passes through the spoke gap of the running wheel when extended, and can be engaged with the running wheel for braking and limiting.

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