Wheelchair with adjustable seat depth

Abstract

The utility model relates to a wheelchair with adjustable seat depth, comprising: a frame, walking wheels rotatably arranged on both sides of the frame, a support frame arranged above the frame, a connecting rod assembly connecting the support frame and the frame, a seat plate arranged on the support frame, and a backrest arranged on the rear side of the seat plate, wherein the seat plate is slidingly arranged on the support frame, when a patient needs to sit down, a caregiver first adjusts the seat depth to the front limit position, at this time, even if the patient stands on the front side of the footrest, the buttocks can stably fall on the appropriate position of the seat plate during the seating process, then the patient and the seat plate are moved backward, the wheelchair can drive the patient to move, and the seat depth of the wheelchair is adjustable.

Description

Technical Field

[0001] This utility model relates to wheelchairs, and more particularly to a wheelchair with adjustable seat depth. Background Technology

[0002] Wheelchairs are commonly used assistive devices for patients with mobility impairments. Patients usually sit down while standing on the ground with their backs to the wheelchair. Most wheelchairs are equipped with footrests that are normally horizontal. To avoid interference between the patient's feet and the footrests when sitting down, the patient needs to stand on the outside of the footrests.

[0003] Existing wheelchairs generally have a problem with excessive seat depth. When patients sit down from the outside of the footrest with their backs to the wheelchair, it is difficult for their center of gravity to be accurately aligned with the seat surface. This can easily lead to a situation where the buttocks do not land stably in the correct position on the seat surface, which may cause them to lose their balance and fall. This not only affects the safety of sitting down but may also cause secondary injuries such as bumps and sprains, bringing additional risks and pain to patients who already have mobility difficulties.

[0004] This design flaw in wheelchairs reduces their ease of use and violates the core requirement of prioritizing safety in assistive devices. Therefore, how to achieve adjustable seat depth in wheelchairs has become an urgent problem for researchers in this field. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to achieve adjustable seat depth for wheelchairs; To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: This utility model relates to a wheelchair with adjustable seat depth, comprising: a frame, with wheels rotatably mounted on both sides of the frame, a support frame mounted on top of the frame, the support frame being connected to the frame via a linkage assembly, a seat plate mounted on the support frame, and a backrest mounted on the rear side of the seat plate; wherein the seat plate is slidably mounted on the support frame, and the seat depth of the wheelchair is adjusted by moving the seat plate forward or backward relative to the support frame.

[0006] Furthermore, the support frame has a U-shaped structure, and slide rails are provided on the two horizontal rods of the support frame. A slider that cooperates with the slide rails is provided at the bottom of the seat plate.

[0007] Furthermore, a stop is provided at the end of the support frame, and a lever is provided on the front side of the stop. When the lever is moved, the stop is raised to a high position, blocking the end of the slider and restricting the movement of the seat plate relative to the support frame.

[0008] Furthermore, the linkage assembly includes two cross-connected links, the middle of the two links are hinged together, one end of the link is fixedly connected to the support frame, and the other end is fixedly connected to the vehicle frame.

[0009] Furthermore, a fixing member is fixed to the bottom of the seat plate, the length direction of the fixing member is parallel to the length direction of the slide rail, and the fixing member has an insertion hole extending through its length direction; A leg support includes a first horizontal section inserted into the insertion hole, an inclined section extending downward at the end of the first horizontal section, and a second horizontal section extending outward horizontally at the bottom of the inclined section, on which a footrest is provided.

[0010] Furthermore, the second horizontal section has a U-shaped structure and is hinged to the inclined section, allowing the foot to switch between horizontal and inclined states.

[0011] Furthermore, lower leg supports are provided on both sides of the inclined section, and the lower leg supports are fixedly connected to the inclined section through connecting rods.

[0012] The beneficial effects of this utility model are as follows: This utility model is a wheelchair with adjustable seat depth. When a patient needs to sit down, the caregiver first adjusts the seat depth to the front limit position. At this time, even if the patient is standing in front of the footrest, the buttocks can be steadily placed in the appropriate position on the seat during the sitting process. Then, the patient and the seat can be moved backward, and the wheelchair can move the patient. This realizes that the seat depth of the wheelchair is adjustable. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural schematic diagram of this embodiment; Figure 2 This is a schematic diagram of the back structure in this embodiment; Figure 3 This is a structural diagram of the seat plate section; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the bottom structure of the base plate. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] See Figure 1-5This embodiment is a wheelchair with adjustable seat depth, including: a frame 1, with wheels 2 rotatably mounted on both sides of the frame 1, a support frame 3 mounted on top of the frame 1, the support frame 3 being connected to the frame 1 via a linkage assembly, a seat plate 4 mounted on the support frame 3, and a backrest 5 mounted on the rear side of the seat plate 4; wherein the seat plate 4 is slidably mounted on the support frame 3, and the seat plate 4 can be moved forward or backward relative to the support frame 3 to adjust the seat depth of the wheelchair, the support frame 3 has a U-shaped structure, and slide rails 51 are mounted on two horizontal rods in the support frame 3, and a slider 52 cooperating with the slide rails 51 is mounted on the bottom of the seat plate 4.

[0017] In this embodiment, the support frame 3 has a U-shaped structure. The left and right sliding rails 51 are respectively provided on the parallel rods on the left and right sides of the support frame 3. The bottom of the seat plate 4 is provided with left and right parallel sliders 52. The seat plate 4 and the support frame 3 are adjusted through the sliding connection of the sliding rails 51 and the sliders 52. That is, the seat plate 4 can move forward relative to the support frame 3. When the patient needs to sit down, the caregiver first adjusts the seat depth to the front limit position. At this time, even if the patient is standing in front of the footrest 6, the buttocks can be steadily placed in the appropriate position on the seat plate 4 during the sitting process. Then, the patient and the seat plate 4 are moved backward. The wheelchair can move the patient, realizing the adjustable seat depth of the wheelchair.

[0018] See Figure 1-5 In some possible embodiments, a stop 31 is provided at the end of the support frame 3, and a lever 32 is provided on the front side of the stop 31. After the lever 32 is moved, the stop 31 is raised to a high position, blocking the end of the slider 52 and restricting the movement of the seat plate 4 relative to the support frame 3. In this embodiment, before the patient sits down, the stop 32 is first lowered to a low position by lever 31. At this time, the stop 32 does not block the slider 52, and the slider 52 can move relative to the slide rail 51. The seat plate 4 can move forward relative to the support frame 3. The stop 32 is then raised to a high position by lever 31. At this time, the stop 32 blocks the slider 52 and restricts the movement of the slider 52 relative to the slide rail 51. The seat plate 4 is then fixedly connected to the support frame 3. Pushing the handle behind the backrest 5 can move the wheelchair as a whole. It should be noted that the middle part of the waist hole for the lever 31 to move up and down has a narrow structure, which can keep the baffle 32 in a high or low position.

[0019] See Figure 1-5 In some possible embodiments, the linkage assembly includes two cross-connected links 9, the middle of the two links 9 is hinged, one end of the link 9 is fixedly connected to the support frame 3, and the other end is fixedly connected to the vehicle frame 1; In this embodiment, the support frame 3 and the vehicle frame 1 are fixedly connected by two intersecting connecting rods 7.

[0020] See Figure 1-5 In some possible embodiments, a fixing member 33 is fixed to the bottom of the seat plate 3. The length direction of the fixing member 33 is parallel to the length direction of the slide rail 51. An insertion hole is provided through the fixing member 33 along its length direction. The leg support 7 includes a first horizontal section 71 inserted into the insertion hole, an inclined section 73 extending obliquely downward at the end of the first horizontal section 71, a second horizontal section 72 extending horizontally outward at the bottom of the inclined section 73, and a foot pedal 6 provided on the second horizontal section 72. In this embodiment, the foot pedal 6 and the seat plate 3 are connected by a leg support 7. Before the patient sits in the wheelchair, the first horizontal segment 71 is pushed to the inner limit position of the insertion hole. At this time, the foot pedal 6 is close to the seat plate 3, which makes it easier for the patient to sit in. After the patient sits in the wheelchair, the leg support 7 is pulled out, and the patient's feet can be supported at the foot pedal 6.

[0021] See Figure 1-5 In some possible embodiments, the second horizontal segment 72 is a U-shaped structure, and the second horizontal segment 72 is hinged to the inclined segment 73, so as to switch the foot pedal 6 in a horizontal and inclined state; Before the patient sits in the wheelchair, the second horizontal section 72 rotates upward, at which point the footrest 6 is in an inclined state. When the patient sits in the wheelchair, he / she is not interfered with by the footrest 6 and can get closer to the wheelchair. After the patient sits in the wheelchair, the second horizontal section 72 flips to a horizontal state, which facilitates foot support for the patient.

[0022] See Figure 1-5 In some possible embodiments, lower leg support members 8 are provided on both sides of the inclined section 73, and the lower leg support members 8 are fixedly connected to the inclined section 73 by connecting rods 81. In this embodiment, the patient's lower leg can also be supported by setting the lower leg support member 8.

[0023] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A wheelchair with adjustable seat depth, characterized in that, Includes: a frame, with wheels rotatably mounted on both sides of the frame, a support frame mounted on top of the frame, the support frame being connected to the frame via a linkage assembly, a seat plate mounted on the support frame, and a backrest mounted on the rear side of the seat plate; The seat plate is slidably mounted on the support frame, and the seat plate can be moved forward or backward relative to the support frame to adjust the seat depth of the wheelchair; The support frame has a U-shaped structure, and slide rails are provided on the two horizontal rods in the support frame. A slider that cooperates with the slide rails is provided at the bottom of the seat plate. A stop block is provided at the end of the support frame, and a lever is provided on the front side of the stop block. When the lever is moved, the stop block is raised to a high position, blocking the end of the slider and restricting the movement of the seat plate relative to the support frame.

2. The wheelchair with adjustable seat depth according to claim 1, characterized in that, The linkage assembly includes two cross-connected links, which are hinged at the middle. One end of each link is fixedly connected to the support frame, and the other end is fixedly connected to the vehicle frame.

3. The wheelchair with adjustable seat depth according to claim 1, characterized in that, The bottom of the seat plate is fixed with a fastener, the length direction of the fastener is parallel to the length direction of the slide rail, and the fastener has an insertion hole extending through its length direction. A leg support includes a first horizontal segment inserted into the insertion hole, an inclined segment extending downward at the end of the first horizontal segment, a second horizontal segment extending outward horizontally at the bottom of the inclined segment, and a footrest provided on the second horizontal segment.

4. The wheelchair with adjustable seat depth according to claim 3, characterized in that, The second horizontal section has a U-shaped structure and is hinged to the inclined section, allowing the foot to switch between horizontal and inclined states.

5. The wheelchair with adjustable seat depth according to claim 3, characterized in that, The inclined section is provided with calf support members on both sides, and the calf support members are fixedly connected to the inclined section through connecting rods.

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