CN213607540U

CN213607540U - Convertible wheelchair

Info

Publication number: CN213607540U
Application number: CN202020508088.9U
Authority: CN
Inventors: 张娟; 苏子文; 张博熙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-07-06
Anticipated expiration: 2030-04-03

Abstract

The utility model provides a convertible wheelchair, includes back support piece, seat, shank backup pad etc. and the seat rotates with back support piece, shank backup pad respectively and is connected, the below of seat is provided with transmission, and under transmission's effect, back support piece can extend and contract with the shank backup pad to can freely change between sitting the position and lying the position, the disease that facilitates the use wheelchair is sat and is stood or lie flat, also can conveniently remove the disease, brings the convenience for the medical treatment of disease.

Description

Convertible wheelchair

Technical Field

The utility model relates to a wheelchair, in particular to a convertible wheelchair which can be converted into a bed for a user to lie down.

Background

In the medical field, it is common to use wheelchairs to transport weak elderly or patients from one location to another. Most wheelchairs are propelled manually, by a motor or by an assistant. In most cases, these transports are of great benefit to the care or medical personnel, but in emergency situations, errors due to handling and removing the injured person from the wheelchair can be fatal. In the case of a caregiver assisting a weak or an old person in hygienic cleaning, such as elimination of bodily waste or bathing, manipulating a patient in and out of a wheelchair on the wheelchair can be an embarrassing and strenuous exercise, which may cause discomfort to some patients.

In addition, conventional wheelchairs, due to their generally rigid and stationary frame, can cause discomfort and injury to the user. Due to the mobility constraints of the user, the patient may be forced to sit in one position for a long time by the wheelchair design. The patient sits in a position for a long time, which not only causes back pain, bedsores and various injuries and discomfort, but also makes it difficult for the patient to receive additional care, such as injections or other treatments, and therapeutic exercise for maintaining proper muscle function and blood circulation. Therefore, there is a need for a convertible wheelchair that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wheelchair that can convert the wheelchair into the bed and use to be convenient for carry out medical treatment to the disease that uses the wheelchair.

Therefore, the utility model adopts the following technical scheme:

a wheelchair comprises a frame, a seat, front wheels and rear wheels, and further comprises a backrest support part and leg support plates, wherein the seat is respectively connected with the backrest support part, and the leg support plates are pivotally connected; a leg having a fixed end and a free end; the fixed end is connected with the backrest support member, and the free end is rotatably provided with an auxiliary wheel; the orthogonal joint is sleeved on the support leg and can move on the support leg; the transmission device comprises a rack gear, a transmission gear, a first driving gear and a second driving gear, wherein the rack gear comprises a first end and a second end, the second end is fixedly connected with the orthogonal joint, and the first end can freely slide; the rack gear is coupled with the transmission gear, the transmission gear is coaxially connected with the first driving gear, and the first driving gear is driven to rotate by the rotation of the transmission gear; the first driving gear is connected with the second driving gear through a chain; the first driving gear drives the second driving gear to rotate through the chain; the second driving gear is coaxially connected with the leg support plate, and the rotation of the second driving gear drives the leg support plate to rotate.

Preferably, the back surface of the backrest support member is provided with a groove, two sides of the bottom surface of the groove are provided with guide grooves, and the two small wheels are respectively positioned in the guide grooves and can roll along the guide grooves; the small wheels in the guide grooves on the two sides are fixedly connected through the connecting rod so as to synchronously roll; the fixed ends of the supporting legs are fixed on the connecting rod.

Drawings

FIG. 1 is a block diagram of a wheelchair;

fig. 2, a structural view of the transmission.

1. Frame, 2, seat, 3, backrest support, 4, leg support plate, 5, rear wheel, 6, front wheel, 7 additional leg, 8, auxiliary wheel, 9, orthogonal joint, 10, rack gear, 11, transmission gear, 12, first driving gear, 13, second driving gear, 14, chain

Detailed Description

The convertible wheelchair structure of the present invention is shown in fig. 1, similar to a conventional wheelchair, and comprises a frame 1, a seat 2, which is fixed at the upper end of the frame, a backrest support 3 fixed to the rear end of the frame and pivotally coupled to the seat 2, a pair of rear wheels 5 rotatably fixed to the rear end of the frame, and a pair of front wheels 6 rotatably fixed to the front end of the frame. In particular, the convertible wheelchair described above comprises a reclining backrest support 3 and an additional leg support plate 4. When the back support is pivoted to a reclined position relative to the seat, the leg support plate is driven to pivot upwardly. The seat, back support and leg support plates are positioned parallel and coplanar with respect to each other when the back support is pivoted to the fully reclined position. An additional leg 7 having a fixed end pivotally secured to the back support rear surface and a free end. The back surface of the backrest support piece is provided with a groove, guide grooves are formed in two sides of the bottom surface of the groove, the two small wheels are respectively positioned in the guide grooves and can roll along the guide grooves, the small wheels in the guide grooves on the two sides are fixedly connected through a connecting rod, and the fixed ends of the supporting legs are fixed on the connecting rod. In the process of inclining the backrest supporting piece, the small wheel rolls up and down in the guide groove, and the supporting legs are driven to move up and down through the connecting rods. The free end of the leg is rotatably mounted with an auxiliary wheel 8. When the back support is lowered to its fully inclined position, the auxiliary wheels 8 contact the floor so that the legs 7 provide support for the horizontal back support.

The transmission is mounted under the seat and is shown in fig. 1 slightly above for clarity of illustration, which is only for illustration and does not show the actual position, for ease of viewing. As shown in fig. 2, the transmission device includes a rack gear 10, a transmission gear 11, a first driving gear 12, and a second driving gear 13. The rack and pinion has opposite first and second ends, the first end being free to slide and the second end being fixed to an orthogonal joint 9. The orthogonal joint is sleeved on the supporting leg 7 and can slide up and down along the supporting leg. Thus, as the legs are raised and lowered due to pivoting of the back support relative to the seat, the orthogonal joint 9 slides along the legs to bring the rack and pinion 10 to and fro. The transmission gear is arranged on a shell of the transmission device, and the transmission gear 11 is driven to rotate by the linear motion of the rack and the gear. The first drive gear 12 is coupled to the transmission gear and is driven to rotate by the rotation of the transmission gear. The second drive gear 13 is coupled to the first drive gear 12 by a chain 14 or the like, and is driven to rotate by the rotation of the first drive gear. The leg support plate 4 has opposite fixed and free ends, the fixed end of which is coaxially connected with the second drive gear 13 through a rotation shaft so that the leg support plate is driven to rotate by the rotation of the second drive gear.

In use, when the back support is pivoted downwards towards a reclined position, the orthogonal joint brings the rack and pinion to slide linearly inside the housing, thereby driving the transmission gear to drive the first drive gear in rotation. Rotation of the first drive gear drives rotation of the second drive gear, which in turn drives rotation of the leg support plate. The seat, back support and leg support plates are positioned parallel and coplanar with respect to each other when the back support is pivoted to the fully reclined position. The auxiliary wheels at the free ends of the additional legs contact the floor when the back support is lowered to its fully reclined position, and the legs provide additional support and stability to the back support.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be understood that various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A convertible wheelchair, includes frame, seat, front wheel, rear wheel, its characterized in that: the chair also comprises a backrest support part and a leg support plate, wherein the seat is respectively connected with the backrest support part and the leg support plate in a pivoting way; a leg having a fixed end and a free end; the fixed end is connected with the backrest support member, and the free end is rotatably provided with an auxiliary wheel; the orthogonal joint is sleeved on the support leg and can move on the support leg; the transmission device comprises a rack gear, a transmission gear, a first driving gear and a second driving gear, wherein the rack gear comprises a first end and a second end, the second end is fixedly connected with the orthogonal joint, and the first end can freely slide; the rack gear is coupled with the transmission gear, and the rack gear slides to drive the transmission gear to rotate; the transmission gear is coaxially connected with the first driving gear, and the rotation of the transmission gear drives the first driving gear to rotate; the first driving gear is connected with the second driving gear through a chain; the first driving gear drives the second driving gear to rotate through the chain; the second driving gear is coaxially connected with the leg support plate, and the rotation of the second driving gear drives the leg support plate to rotate.

2. The wheelchair of claim 1 wherein: the back surface of the backrest support is provided with a groove, two sides of the bottom surface of the groove are provided with guide grooves, and the two small wheels are respectively positioned in the guide grooves and can roll along the guide grooves; the small wheels in the guide grooves on the two sides are fixedly connected through the connecting rod so as to synchronously roll; the fixed ends of the supporting legs are fixed on the connecting rod.