TH19419Y - Standing wheelchair - Google Patents

Abstract

The adjustable standing wheelchair, as invented here, is a wheelchair with a structure similar to a conventional wheelchair when seated. Its distinguishing feature is a mechanism that allows it to transition from a seated to a standing position. This unique mechanism allows the user to stand independently by using their arms to lift themselves via the handrails, pushing forward to activate the designed assistive mechanism. Furthermore, the assistive device can also adjust the user's height using the handrails. When standing, the user will maintain a vertical angle that is tilted as designed.

Claims (1)

1. The standing wheelchair consists of a main structure (1) which is the main structure attached to the front wheels of the wheelchair (3), 2 wheels on the left and right. The front part of the main structure (1) in the middle is attached to the rear wheels of the wheelchair (2), 2 wheels on the left and right. The top of the main structure (1) is connected to the wheelchair seat structure (4). The seat (5) is installed on the top of the wheelchair seat structure (4). The wheelchair seat structure (4) can be adjusted from a horizontal to a vertical angle via 2 main angle adjustment joints (6), which act as pivot points between the wheelchair seat structure (4) and the main structure (1). The backrest structure (7) has a backrest (8) and a chest strap (9) installed. The backrest structure (7) can be adjusted in angle and level via an adjustment shaft (10) which is a shaft connecting the main structure (1) to the backrest structure (7). The wheelchair seat structure (4) is connected via the standing angle adjustment joint (11), allowing the wheelchair to be in a standing position. The seat (5) and backrest (8) are aligned in a straight line. The leg rest adjustment structure adjusts the user's leg rest level and angle when transitioning from a sitting to a standing position in the wheelchair. The leg rest adjustment is made from the leveling shaft (10), which is a force-transmitting shaft connected to the leg rest adjustment structure at the end of the leg rest shaft (12) in the form of a pivot point along the attachment path, and the leg rest shaft joint plate (13), one end of which is connected to the main structure (1) and the other end to the middle of the leg rest shaft (12) in the form of a pivot point along the attachment path. This changes the angle and height of the leg rest (14), allowing for adjustment from a sitting to a standing position or from a standing to a sitting position in the wheelchair. There is a relationship between the backrest structure (8), the wheelchair seat structure (4), and the leg rest (14). The leg rest adjustment structure can adjust the height of the leg rest (14) to accommodate users of different heights by adjusting its height up and down along the leg rest shaft (12) along the attachment path. The leg rest adjustment structure is fitted with an ankle strap (15) attached to the leg rest shaft (12) via a pivot point, which supports the user's ankles. The sitting-to-standing adjustment mechanism consists of two parts: a force-transmitting part using a gas spring (19) to assist in lifting the user, with one end of the gas spring (19) attached to the main structure (1) and the other end attached to the wheelchair seat structure (4) as a pivot point via a pivot point; and a lever mechanism consisting of a handrail shaft (20) centrally attached to the wheelchair seat structure (4) and the other end attached to the handrail locking shaft (21). The lever mechanism works in two ways: in the standing position, the user exerts force on the end of the handrail shaft (20) pushing forward, or by causing the handrail shaft (20) to rotate toward the wheelchair, which applies force to the handrail locking shaft (21), causing the wheelchair seat structure (4) to be lifted and rotated forward. This results in the wheelchair changing from a sitting to a standing position. The assistive type has force applied to the end of the handrail frame (20) to change the wheelchair from a sitting to a standing position as well. It has a special feature: - The locking mechanism for adjusting the sitting position consists of a locking tube (22) that fits into the main structure (1) in a sliding manner. At one end, there is a handwheel for rotating the locking tube (24) which is connected to the locking tube (22), and at the back of the locking tube is a block designed to fit into the end of the wheelchair seat structure (4) at the end of the wheelchair seat structure tube (4). It is locked by pushing the handwheel for rotating the locking tube (24) forward, causing the locking tube (22) to slide forward, causing the block at the end of the tube to move into the end of the wheelchair seat structure tube (4), thus locking the wheelchair seat structure (4) from lifting. To unlock the locking mechanism for adjusting the sitting position, the handwheel for rotating the locking tube (24) is pushed backward. To allow the locking tube of the leveling shaft (22) to slide backward, the block end of the tube moves away from the position of the end tube of the wheelchair frame (4), causing the lock to be released, allowing the wheelchair frame (4) to rotate - Leg rest angle adjustment mechanism. The leg rest adjustment is made from the leveling shaft (10), which is a force-transmitting and locking shaft connected at the end of the leg rest shaft (12) in the form of a pivot point in the attachment path, and the leg rest shaft joint plate (13) which at one end is connected to the main frame (1) and at the other end is connected to the middle of the leg rest shaft (12) in the form of a pivot point in the attachment path at both ends of the leg rest shaft joint plate (13). The leg rest shaft joint plate (13) is responsible for changing the angle. And the height of the leg rest (14) - The leg rest (14) can be adjusted in height with the leg rest shaft (12) by means of a fastening mechanism through holes drilled in different positions on the leg rest shaft (12) which has an ankle strap (15) installed to support the user's ankle. - The knee locking mechanism consists of a knee locking shaft (16) whose end is connected to the main structure (1) in the manner of a pivot point by means of a flexing mechanism, allowing it to be adjusted to be angled toward the wheelchair or perpendicular to the vertical. This is achieved by having an adjustment plate for the knee locking shaft (26) which limits the angle of the knee locking shaft to the desired angle, using a hand-operated knee lock (25) to hold the knee locking shaft (16) in place by means of a fastening mechanism, and the knee locking shaft (16) can be adjusted to be angled toward the wheelchair. For transferring patients from the side and front to the wheelchair, the knee lock bar (16) has a knee lock strap (17) that fastens between the two knee lock bars (16). The knee lock strap (17) supports a knee cushion (18) which is shaped like an E and has a concave shape to fit the patient's legs, with a central bar to prevent the user's knees from touching and side edges to maintain the patient's leg shape in a straight line. The knee cushion (18) can be detached from the knee lock bar (16), and the knee lock strap (17) can be loosened, leaving a gap in the middle between the knee lock bars to facilitate transferring the user onto the wheelchair.