Wheelchair frame with adjustable leg support

Abstract

The utility model relates to the technical field of medical equipment, in particular to a wheelchair frame with an adjustable leg support, which comprises a frame body, an axle is arranged below the frame body, hubs are rotatably arranged on two sides of the axle, the frame body comprises a longitudinal beam and a bent beam, the longitudinal beam is fixedly connected above the axle, and the bent beam is rotatably arranged on the longitudinal beam. The two longitudinal beams and the two camber beams are symmetrically arranged, wheel frames are arranged at the ends, away from the longitudinal beams, of the camber beams, the two wheel frames are fixedly connected to the two sides of the bottoms of the camber beams and incline towards the sides away from each other, universal wheels are installed on the wheel frames, and connecting rods are further arranged at the ends, close to the wheel frames, of the camber beams. The connecting rods on the two bent pipes are symmetrically arranged, a limiting sleeve is detachably connected between the two connecting rods, the limiting sleeve is arranged at the ends of the two connecting rods in a sliding mode, the two bent beams can be adaptively adjusted according to the legs of a user by arranging the rotatable bent beams, and then the use comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a wheelchair frame with an adjustable leg support. Background Art

[0002] A wheelchair is a chair equipped with wheels to help replace walking, which is divided into electric and manual folding wheelchairs and is used to help patients with inconvenient lower limbs move around. The existing wheelchair frames are generally made of bent aluminum tubes. The bending angle of the aluminum tube between the hip and the calf of the wheelchair frame is generally 90-120°, which can improve the comfort of patients during the postoperative recovery process. Since patients sitting in a wheelchair for a long time are prone to slow blood circulation speed, improving blood flow in the legs can effectively improve the recovery effect of patients. For example, Chinese patent CN213788287U includes a frame, wheels, a seat cushion, armrests, a backrest and footrests. The backrest is rotatably connected to the frame, and a first angle adjuster is provided between the backrest and the frame. A shoulder fixing mechanism is provided on each side of the upper end of the backrest; a limiting mechanism for restricting the movement of the forearms is provided on the armrests; a leg rest is further provided at one end of the frame away from the backrest. The leg rest includes a support rod and a tray for supporting the patient's calf. The support rod is rotatably connected to the frame, and a second angle adjuster is provided between the support rod and the frame; the footrest is an integrally formed whole plate, the width of the footrest is greater than 30 cm, and a landing structure for making itself land on the ground is provided on the footrest. The above patent urges users to develop good sitting postures to enable them to recover better. However, in actual use, the volumes of different patients are different, and the sizes of wheelchairs required are also different. For patients who need postoperative recovery of the legs, such as patients with leg fractures, their legs usually need to be fixed for a long time of rest. Therefore, a frame of a suitable size needs to be provided for their legs.

[0003] The utility model provides a wheelchair frame with an adjustable leg support, which provides a frame of a suitable size for the patient's legs, improves the comfort of the patient during long-term use while ensuring the stability of the legs, and further ensures the stable circulation of blood in the legs, and improving the recovery effect of patients is what those skilled in the art need to do. Content of the Utility Model

[0004] The purpose of the utility model is to provide a wheelchair frame with an adjustable leg support to solve the technical problems in the prior art that patients sitting in a wheelchair for a long time are prone to slow blood circulation speed, the sizes of patients' legs are different, the wheelchair frames are not suitable, and the use effect and recovery effect of patients are affected.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows: A wheelchair frame with an adjustable leg support includes a frame body. An axle is provided below the frame body, and wheels are rotatably provided on both sides of the axle. The frame body includes longitudinal beams fixedly connected above the axle and bent beams rotatably arranged on the longitudinal beams. There are two longitudinal beams and two bent beams, and they are symmetrically arranged. One end of the bent beam away from the longitudinal beam is provided with a wheel frame. The two wheel frames are fixedly connected to both sides of the bottom of the bent beam and inclined towards the mutually separated sides. Universal wheels are installed on the wheel frames. One end of the bent beam close to the wheel frame is further provided with a connecting rod. The connecting rods on the two bent beams are symmetrically arranged. A limiting sleeve is detachably connected between the two connecting rods, and the limiting sleeve is slidably arranged at the ends of the two connecting rods.

[0006] Further, the longitudinal beam is in a horizontal tubular structure, and the bent beam is in a 7-shaped bent pipe structure. One end of the bent beam is rotatably arranged at the end of the longitudinal beam, and the other end of the bent beam is perpendicular to the longitudinal beam and extends downward.

[0007] Further, the distance between the two bent beams is less than the distance between the two longitudinal beams.

[0008] Further, a cross beam is fixedly connected between the two longitudinal beams near the bent beam, and the axis of the cross beam is located between the axis of the longitudinal beam and the axis of the axle.

[0009] Further, a frame structure is formed among the axle, the cross beam, and the longitudinal beam.

[0010] Further, the end of the longitudinal beam near the cross beam is higher than the end of the longitudinal beam away from the cross beam.

[0011] Further, the axle is located at the end of the longitudinal beam away from the cross beam, and the longitudinal beam is fixedly connected to both sides above the axle.

[0012] Further, a hook is also provided on the bent beam, and an elastic strap is sleeved on the hook.

[0013] Further, both ends of the limiting sleeve are threadedly connected to the two connecting rods.

[0014] The beneficial effects of the present utility model are as follows: By setting the rotatable bent beams, the two bent beams can be adaptively adjusted according to the legs of the user, so that the legs of the user can closely lean on the two bent beams and the cushion therebetween, thereby ensuring the comfort of use and making the present utility model more in line with the human body structure. At the same time, the present utility model uses an elastic strap to fixedly connect the legs of the user to the bent beam, thereby reducing the movement of the legs, facilitating rest and rehabilitation, and improving the use stability. Description of the Drawings

[0015] Figure 1 It is a three-dimensional view of the wheelchair frame with an adjustable leg support of the present utility model.

[0016] Figure 2 This is the front view of the wheelchair frame with an adjustable leg support of the present utility model.

[0017] Figure 3 This is the right view of the wheelchair frame with an adjustable leg support of the present utility model.

[0018] Figure 4 This is the top view of the wheelchair frame with an adjustable leg support of the present utility model.

[0019] The markings of each component in the attached drawings are as follows: 10, the main body of the frame; 101, the longitudinal beam; 102, the wheel carrier; 103, the bent beam; 104, the connecting rod; 105, the limiting sleeve; 106, the hook; 20, the axle; 30, the cross beam; 40, the wheel hub. Detailed implementation manners

[0020] Now, the present utility model will be described in detail with reference to the attached drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner. Therefore, it only shows the components related to the present utility model.

[0021] Please refer to Figure 1 , Figure 2 , a wheelchair frame with an adjustable leg support, including the main body of the frame 10. An axle 20 is provided below the main body of the frame 10. Wheel hubs 40 are rotatably provided on both sides of the axle 20. The main body of the frame 10 includes a longitudinal beam 101 fixedly connected above the axle 20 and a bent beam 103 rotatably arranged on the longitudinal beam 101. There are two longitudinal beams 101 and two bent beams 103, which are symmetrically arranged. The longitudinal beam 101 is a horizontal tubular structure, and the bent beam 103 is a 7-shaped bent pipe structure. One end of the bent beam 103 is rotatably arranged at the end of the longitudinal beam 101 by a rotating shaft (not shown in the figure). The other end of the bent beam 103 is perpendicular to the longitudinal beam 101 and extends downward. The distance between the two bent beams 103 is smaller than the distance between the two longitudinal beams 101.

[0022] When in use, a seat cushion (not shown in the figure) is sleeved between the two longitudinal beams 101. The user sits between the two longitudinal beams 101, and the longitudinal beams 101 bear most of the user's weight to ensure the use stability. At the same time, according to ergonomics, the use size of the user's buttocks is larger than that of the legs. Therefore, the frame body 10 of the present utility model is segmented and modified so that the curved beam 103 can rotate. The user's legs are placed between the curved beams 103, and an elastic cushion (not shown in the figure) is also sleeved between the two curved beams 103. The elastic cushion is made of rubber material and can elastically change according to the distance between the two curved beams 103. By rotating the curved beam 103, the two curved beams 103 can be adaptively adjusted according to the user's legs, so that the user's legs can closely lean on the two curved beams 103 and the cushion between the two curved beams 103, thereby ensuring the use comfort and making the present utility model more in line with the human body structure.

[0023] In this embodiment, please refer specifically to Figure 4 , on the top view projection plane, the included angle formed by the curved beam 103 and the longitudinal beam 101 in the top view is 100-170°; the present utility model makes use of the fact that the use size of the human buttocks is larger than that of the legs, so that the two curved beams 103 rotate relatively or towards each other, so that the user's body can fit the frame body 10 more closely. According to ergonomics, the degree of inward bending of the curved beam 103 is adjusted to further improve the comfort.

[0024] In this embodiment, a cross beam 30 is fixedly connected between the two longitudinal beams 101 near the curved beam 103 to improve the structural strength between the two longitudinal beams 101 and ensure the use stability of the user. Please refer specifically to Figure 2 , Figure 3 , Figure 4 , on the front view projection plane, the axis of the cross beam 30 is located between the axis of the longitudinal beam 101 and the axis of the axle 20, that is, a frame structure is formed by the axle 20, the cross beam 30, and the longitudinal beam 101 in the top view; a frame structure is formed by the axle 20, the cross beam 30, and the longitudinal beam 101 in the front view. The present utility model makes use of the three-dimensional frame structure formed by the axle 20, the cross beam 30, and the longitudinal beam 101, so that the center of gravity of the frame body 10 is located inside the three-dimensional frame structure, thereby providing sufficient supporting force for the load.

[0025] In this embodiment, one end of the longitudinal beam 101 close to the cross beam 30 is higher than the end of the longitudinal beam 101 away from the cross beam 30. The axle 20 is located at the end of the longitudinal beam 101 away from the cross beam 30. The axle 20 and the wheel hub 40 are rotatably connected through bearings. At the same time, the longitudinal beam 101 is fixedly connected to both sides above the axle 20. Aluminum tubes with the same diameter are fixedly connected between the axle 20 and the longitudinal beam 101 to ensure the stable installation of the axle 20 on the longitudinal beam 101. Based on the characteristic that the center of gravity of the human body will be located at the position of the axle 20 when relying on the wheelchair, the structural strength of the axle 20 part is strengthened. At the same time, through the inclined longitudinal beam 101, the reliance of the user is closer to the axle 20, which is more in line with ergonomics and improves the use comfort and safety.

[0026] In another embodiment, the axle 20 and the longitudinal beam 101 are elastically connected, and a shock absorber spring is provided between the axle 20 and the longitudinal beam 101 to provide a supporting force for the axle 20 and improve the seismic effect at the same time.

[0027] Please refer to again Figure 1 、 Figure 4 , a wheel carrier 102 is provided at one end of the curved beam 103 away from the longitudinal beam 101. The two wheel carriers 102 are fixedly connected to both sides of the bottom of the curved beam 103 and inclined towards the mutually separated sides. That is, on the projection plane in the top view, a V-shaped is formed between the wheel carrier 102 and the curved beam 103; a universal wheel (not shown in the figure) is installed on the wheel carrier 102.

[0028] By providing the outwardly extending wheel carrier 102, the present invention makes it impossible for the universal wheels to contact each other when the curved beams 103 approach each other, thereby ensuring the use stability.

[0029] A connecting rod 104 is rotatably provided at one end of the curved beam 103 close to the wheel carrier 102. The connecting rods 104 on the two curved beams 103 are symmetrically arranged. A limiting sleeve 105 is detachably connected between the two connecting rods 104 by a pin. The limiting sleeve 105 is slidably arranged at the ends of the two connecting rods 104.

[0030] During use, after rotating the two curved beams 103 to approach or separate from each other, one end of the limiting sleeve 105 is sleeved on one connecting rod 104, and the limiting sleeve 105 is fixedly connected to one connecting rod 104 by a pin. Then, the other connecting rod 104 is inserted into the limiting sleeve 105, and the limiting sleeve 105 is mutually fixed to the other connecting rod 104 by a pin. In this way, the distance between the two connecting rods 104 is restricted by the limiting sleeve 105, thereby ensuring the connection stability and adjustment accuracy.

[0031] Understandably, in this embodiment, the limiting sleeve 105 is symmetrically provided with first jacks, and the connecting rod 104 is provided with a plurality of second jacks. The second jacks are uniformly arranged along the axial direction of the connecting rod 104. The second jacks penetrate through one wall of the connecting rod 104 and extend into the interior of the connecting rod 104. The pin passes through the first jack and is connected in the second jack in a matching manner, so as to fix and connect the limiting sleeve 105 to the connecting rod 104 by using the pin. At the same time, according to the position where the pin is inserted and pulled out in the second jack, the depth of the connecting rod 104 in the limiting sleeve 105 can be confirmed, thereby ensuring the distance between the two curved beams 103 and improving the use accuracy.

[0032] In this embodiment, the curved beam 103 is further provided with a hook 106. The hook 106 is used to sleeved with an elastic strap. When in use, the elastic strap passes through the hook 106 and winds around the cushion, the curved beam 103 and the leg of the user, so as to facilitate the fixed connection of the leg of the user to the curved beam 103, reduce the leg movement, facilitate rest and rehabilitation, and improve the use stability.

[0033] In this embodiment, the limiting sleeve 105 is further provided with a pedal (not shown in the figure). When installing, the pedal is installed on the limiting sleeve 105 by using fasteners such as bolts or screws, so as to place the feet of the user and improve the use comfort.

[0034] The specific operation mode of the present utility model is as follows: The user sits between the two longitudinal beams 101. According to the use size of the user's legs, the curved beam 103 is rotated. The legs of the user are placed between the curved beams 103. By rotating the curved beam 103, the two curved beams 103 can be adaptively adjusted according to the legs of the user. The limiting sleeve 105 is installed on the connecting rod 104, and at the same time, the legs are fixedly connected to the curved beam 103 by using the elastic strap to complete the fixation of the legs.

[0035] The present utility model makes the two curved beams 103 can be adaptively adjusted according to the legs of the user by setting the rotatable curved beam 103, so that the legs of the user can be closely leaned on the two curved beams 103 and the cushion therebetween, thereby ensuring the use comfort and making the present utility model more in line with the human body structure. At the same time, the present utility model can fixedly connect the legs of the user to the curved beam 103 by using the elastic strap, thereby reducing the leg movement, facilitating rest and rehabilitation, and improving the use stability.

[0036] It is understood that the present utility model is described by means of some embodiments. Those skilled in the art will know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A wheelchair frame with an adjustable leg support, comprising a frame body (10), an axle (20) being provided below the frame body (10), and wheel hubs (40) being rotatably provided on both sides of the axle (20), characterized in that: The frame body (10) comprises a longitudinal beam (101) fixedly connected above the axle (20) and a curved beam (103) rotatably arranged on the longitudinal beam (101). The longitudinal beam (101) and the curved beam (103) are each provided with two and symmetrically arranged. A wheel frame (102) is provided at one end of the curved beam (103) away from the longitudinal beam (101). The two wheel frames (102) are fixedly connected to two sides of the bottom of the curved beam (103) and are inclined toward a side away from each other. Universal wheels are installed on the wheel frames (102). A connecting rod (104) is rotatably provided at one end of the curved beam (103) close to the wheel frame (102). The connecting rods (104) on the two curved beams (103) are symmetrically arranged. A limiting sleeve (105) is detachably connected between the two connecting rods (104). The limiting sleeve (105) is slidably arranged at the ends of the two connecting rods (104).

2. A wheelchair frame with adjustable leg supports according to claim 1, characterized in that: The longitudinal beam (101) is in a horizontal tubular structure, the curved beam (103) is in a 7-shaped curved tube structure, one end of the curved beam (103) is rotatably arranged at the end of the longitudinal beam (101), and the other end of the curved beam (103) is perpendicular to the longitudinal beam (101) and extends downward.

3. The wheelchair frame with adjustable leg supports according to claim 1, characterized in that: The distance between the two curved beams (103) is smaller than the distance between the two longitudinal beams (101).

4. The wheelchair frame with adjustable leg supports according to claim 1, characterized in that: A crossbeam (30) is fixedly connected between the two longitudinal beams (101) near the curved beam (103), and an axis of the crossbeam (30) is located between an axis of the longitudinal beam (101) and an axis of the axle (20).

5. A wheelchair frame with adjustable leg supports according to claim 4, characterized in that: A frame structure is formed between the axle (20), the cross beam (30) and the longitudinal beam (101).

6. The wheelchair frame with adjustable leg supports according to claim 4, characterized in that: An end of the longitudinal beam (101) close to the cross beam (30) is higher than an end of the longitudinal beam (101) far from the cross beam (30).

7. The wheelchair frame with adjustable leg supports according to claim 1, characterized in that: The axle (20) is located at one end of the longitudinal beam (101) away from the cross beam (30), and the longitudinal beam (101) is fixedly connected to both sides above the axle (20).

8. The wheelchair frame with adjustable leg supports according to claim 1, characterized in that: The curved beam (103) is also provided with a hook (106), and the hook (106) is sleeved with an elastic binding belt.

9. The wheelchair frame with adjustable leg supports according to claim 1, characterized in that: Both ends of the limiting sleeve (105) are respectively threadedly connected to the two connecting rods (104).

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