Adjustable wheelchair

Abstract

The utility model relates to an adjustable wheelchair which comprises a seat plate and a backrest, fixing plates are installed on the outer surfaces of the two sides of the seat plate, adjusting supports are installed on the outer surfaces of the fixing plates through angle adjusting mechanisms, and pedal plates are installed at the ends of the adjusting supports. A pressure sensor is arranged in the seat plate, the outer surface of the backrest is connected with two bandages, the end parts of the two bandages are respectively provided with a son plug-in button and a mother plug-in button, a light touch switch is arranged in the mother plug-in button, the light touch switch is electrically connected with the pressure sensor, and an alarm is arranged on the surface of the backrest and is electrically connected with the light touch switch. Through the arrangement of the angle adjusting mechanism, the angle of the pedal can be adjusted, so that the legs of the elderly patient can be lifted when the elderly patient sits on the wheelchair for a long time, the situation that leg muscles cannot be fully stretched and have a rest due to the fact that the legs are always in a bent state is avoided, blood circulation of the legs can be promoted, and the patient can feel comfortable. The comfort level is improved; and adverse effects are reduced.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically to an adjustable wheelchair. Background Technology

[0002] A wheelchair is a means of transportation designed specifically for people with mobility impairments. It typically consists of a wheelchair frame, wheels, a seat, and a backrest. It supports the user's body and allows them to move by manual pushing or electric drive, thereby meeting their needs for travel, daily living, and participation in social activities.

[0003] Chinese patent CN220632375U discloses an adjustable wheelchair. The wheelchair moves by pulling a guide rod, which moves the foot pedals. When the foot pedals are moved to a suitable height for the patient, a fixing bolt is rotated. The fixing bolt passes through the guide tube and is inserted into the threaded groove of the guide rod, thereby fixing the guide rod. This makes the foot pedals as adaptable as possible to patients of different heights and improves the practicality of the wheelchair.

[0004] Although the aforementioned patent allows for adjustment of the footrest height, when sitting in a wheelchair for extended periods, the legs remain in a bent position. The leg muscles, being shortened, cannot get sufficient stretching and rest, which can easily lead to muscle fatigue and soreness. Furthermore, prolonged bending of the legs may also affect blood circulation, causing problems such as numbness, swelling, and varicose veins in the legs.

[0005] Furthermore, falls are the number one killer threatening the safety of the elderly, and are closely related to many factors such as declining physiological functions and reaction abilities, and the coexistence of multiple diseases. Some elderly people are prone to falls when getting up on their own due to declining cognitive abilities, frailty, or stubbornness and unwillingness to trouble others. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable wheelchair to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows.

[0008] An adjustable wheelchair includes a seat and a backrest. Fixed plates are mounted on both outer surfaces of the seat. Adjustment brackets are mounted on the outer surfaces of the fixed plates via an angle adjustment mechanism, and footrests are mounted at the ends of the adjustment brackets. A pressure sensor is installed inside the seat. Two straps are connected to the outer surface of the backrest, with male and female buckles respectively installed at their ends. A tactile switch is installed inside the female buckle and is electrically connected to the pressure sensor. An alarm is installed on the surface of the backrest and is electrically connected to the tactile switch.

[0009] Therefore, the angle adjustment mechanism allows for adjustment of the footrest angle, enabling elderly patients to elevate their legs when sitting in a wheelchair for extended periods. This prevents leg muscles from being unable to fully stretch and rest due to the legs remaining in a bent position, promotes blood circulation in the legs, improves comfort, and reduces adverse effects. Furthermore, the straps enhance the stability of the elderly patient's body and trigger an alarm when the patient gets up from the wheelchair, alerting caregivers to provide timely assistance and prevent falls and injuries.

[0010] Furthermore, the angle adjustment mechanism includes a connecting shaft mounted on the outer surface of the adjustment bracket. The end of the connecting shaft extends through the fixed plate and is fitted with a worm gear. A motor is installed inside the fixed plate, and the end of the motor output shaft is connected to a worm, which meshes with the worm gear.

[0011] Furthermore, a control switch is provided on the outer surface of the fixing plate, and the control switch is electrically connected to the motor.

[0012] Furthermore, the upper surface of the foot pedal is provided with a heel guard, and the outer surface of the adjustment bracket is provided with a leg guard.

[0013] Furthermore, a limiting groove is formed on the outer surface of the fixing plate around the connecting shaft, and a limiting block is installed on the outer surface of the connecting shaft, with the end of the limiting block set in the limiting groove.

[0014] Furthermore, a support shaft is installed at the end of the worm gear, and the end of the support shaft is rotatably connected to the top wall of the fixed plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0016] 1. This utility model, through the setting of an angle adjustment mechanism, can adjust the angle of the foot pedal, thereby raising the legs of elderly patients when they sit in a wheelchair for a long time, avoiding the situation where the legs are always in a bent position, which prevents the leg muscles from being fully stretched and rested, and can also promote blood circulation in the legs, improve comfort and reduce adverse effects.

[0017] 2. This utility model is approved. The strap design improves the stability of elderly patients and triggers an alarm when the patient gets up from their wheelchair, prompting caregivers to provide timely assistance and prevent falls and injuries. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the regional structure of the fixing plate in this utility model;

[0020] Figure 3 This is a schematic diagram of the angle adjustment mechanism in this utility model;

[0021] Figure 4 This is a cross-sectional structural diagram of the female snap fastener in this utility model.

[0022] In the diagram: 100, seat; 101, backrest; 102, fixing plate; 103, adjustment bracket; 104, foot pedal; 105, strap; 106, male buckle; 107, female buckle; 108, tactile switch; 109, alarm; 200, angle adjustment mechanism; 201, connecting shaft; 202, worm gear; 203, motor; 204, worm; 300, control switch; 400, heel guard; 401, leg guard; 500, limit groove; 501, limit block; 600, support shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0025] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] like Figure 1-4As shown, an adjustable wheelchair includes a seat 100 and a backrest 101. Fixing plates 102 are mounted on both outer surfaces of the seat 100. Adjustment brackets 103 are mounted on the outer surfaces of the fixing plates 102 via an angle adjustment mechanism 200. Foot pedals 104 are mounted at the ends of the adjustment brackets 103. A pressure sensor is installed inside the seat 100. Two straps 105 are connected to the outer surface of the backrest 101. A male buckle 106 and a female buckle 107 are respectively installed at the ends of the two straps 105. A tactile switch 108 is installed inside the female buckle 107 and is electrically connected to the pressure sensor. An alarm 109 is installed on the surface of the backrest 101 and is electrically connected to the tactile switch 108.

[0027] When in use, elderly patients place their feet on the foot pedal 104. When they need to stretch their legs, the foot pedal 104 can be rotated by the angle adjustment mechanism 200, which can lift their legs to stretch them. This avoids the situation where the legs are always in a bent position, which prevents the leg muscles from being fully stretched and rested. It can also promote blood circulation in the legs, improve comfort, and reduce adverse effects.

[0028] When no one is sitting on the seat 100, the pressure sensor is not triggered, the tactile switch 108 is also in an untriggered state, and the alarm 109 does not sound. When an elderly patient sits on the seat 100, the pressure sensor senses the weight and is triggered, sending a signal to the tactile switch 108, causing the tactile switch 108 to trigger and send a signal to the alarm 109, which then sounds an alarm. When the elderly patient fastens the strap 105 to their body and inserts the sub-buckle 106 into the female buckle 107, the sub-buckle 106 contacts the tactile switch 108, causing the tactile switch 108 to de-trigger and deactivate the alarm 109. Therefore, if an elderly patient wants to get up from the wheelchair, they must first separate the sub-buckle 106 from the female buckle 107, which will then trigger the tactile switch 108 and cause the alarm 109 to sound, thus alerting caregivers to provide timely assistance and prevent falls and injuries.

[0029] Specifically, the angle adjustment mechanism 200 includes a connecting shaft 201 mounted on the outer surface of the adjustment bracket 103. The end of the connecting shaft 201 extends into the fixed plate 102 and is fitted with a worm gear 202. A motor 203 is installed inside the fixed plate 102. The end of the output shaft of the motor 203 is connected to a worm 204, which meshes with the worm gear 202. When the motor 203 is started, its output shaft drives the worm 204 to rotate. Since the worm 204 and the worm gear 202 mesh with each other, the connecting shaft 201 can be driven to rotate, thereby driving the adjustment bracket 103 to rotate and achieving the purpose of leg extension.

[0030] Specifically, a control switch 300 is provided on the outer surface of the fixing plate 102. The control switch 300 is electrically connected to the motor 203. The setting of the control switch 300 makes it easy to control the flipping state of the adjusting bracket 103.

[0031] Specifically, the upper surface of the foot pedal 104 is provided with a heel guard 400, and the outer surface of the adjustment bracket 103 is provided with a leg guard 401. When the elderly patient's leg is in an extended position, the heel guard 400 can provide support for the heel, and the leg guard 401 can provide support for the lower leg, thereby preventing the leg from falling off the foot pedal 104.

[0032] Specifically, a limiting groove 500 is formed on the outer surface of the fixing plate 102 around the connecting shaft 201, and a limiting block 501 is installed on the outer surface of the connecting shaft 201. The end of the limiting block 501 is set in the limiting groove 500. By setting the limiting groove 500 and the limiting block 501, the rotation angle of the adjusting bracket 103 can be limited, thereby controlling the maximum and minimum extension of the leg and avoiding limb injury.

[0033] Specifically, a support shaft 600 is installed at the end of the worm 204. The end of the support shaft 600 is rotatably connected to the top wall of the fixed plate 102. By setting the support shaft 600, a support point can be provided for the top of the worm 204, making its structure more stable and ensuring a stable meshing state between the worm 204 and the worm wheel 202.

[0034] The above is a detailed description of the present invention in conjunction with specific embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, any equivalent substitutions or obvious modifications made without departing from the concept of the present invention, and which have the same performance or use, should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. An adjustable wheelchair, comprising a seat plate (100) and a backrest (101), characterized in that: both sides of the seat plate (100) are provided with a fixed plate (102), the outer surface of the fixed plate (102) is provided with an adjusting bracket (103) through an angle adjusting mechanism (200), and the end of the adjusting bracket (103) is provided with a foot plate (104); the inside of the seat plate (100) is provided with a pressure sensor, the outer surface of the backrest (101) is connected with two belts (105), the ends of the two belts (105) are respectively provided with a female buckle (106) and a male buckle (107), the inside of the female buckle (107) is provided with a micro switch (108), the micro switch (108) is electrically connected with the pressure sensor, the surface of the backrest (101) is provided with an alarm (109), and the alarm (109) is electrically connected with the micro switch (108).

2. The adjustable wheelchair according to claim 1, characterized in that: the angle adjusting mechanism (200) comprises a connecting shaft (201) installed on the outer surface of the adjusting bracket (103), the end of the connecting shaft (201) penetrates into the fixed plate (102) and is provided with a worm gear (202), the inside of the fixed plate (102) is provided with a motor (203), the end of the output shaft of the motor (203) is connected with a worm (204), and the worm (204) is meshed with the worm gear (202).

3. The adjustable wheelchair according to claim 2, characterized in that: the outer surface of the fixed plate (102) is provided with a control switch (300), and the control switch (300) is electrically connected with the motor (203).

4. The adjustable wheelchair according to claim 1, characterized in that: the upper surface of the foot plate (104) is provided with a heel stopper (400), and the outer surface of the adjusting bracket (103) is provided with a leg stopper (401).

5. The adjustable wheelchair according to claim 2, characterized in that: the outer surface of the fixed plate (102) is provided with a limiting groove (500) around the connecting shaft (201), the outer surface of the connecting shaft (201) is provided with a limiting block (501), and the end of the limiting block (501) is arranged in the limiting groove (500).

6. The adjustable wheelchair according to claim 2, characterized in that: the end of the worm (204) is provided with a supporting shaft (600), and the end of the supporting shaft (600) is rotatably connected with the top wall of the fixed plate (102).

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