Patent Application
20100327557
1. Fields of the Invention
The present invention relates to an electric wheelchair, especially to an electric wheelchair being folded into a movable luggage or extended into an assistant wheelchair allowing people to sit on by a pivoted member and a foldable member. Together with an accessory tip wheel tilted a little angle, the problem caused by caused by movement of the center of gravity of the wheelchair while moving can be solved and the safety of users is ensured.
2. Descriptions of Related Art
Some people suffering from serious diseases or accidents such as car accidents or stroke have paralysis involving the lower extremities. Some are nursing care recipients who are bed-bound and unable to move or walk. This results in muscle atrophy and weakness in their legs and they could not walk any more. Some are elders whose psychological functions are impaired and moved slowly. Once these handicapped people intend to move a long distance, they need crutches or wheelchairs. However, these mobility aid devices are operated manually. This is not only energy consuming but the moving speed is also limited. Thus the devices have caused trouble and inconvenience to users.
Thus some manufactures have invented various electric equipments such as electric scooters and electric wheelchairs. By the power from electricity, handicapped people can move more easily and conveniently. Although these devices help handicapped people a lot in their daily lives, they still have some problems in use. In fact, most of the electric wheelchairs is designed in an integrated structure and is unable to be folded for storage. When not in use, they need much storage space. This causes inconvenience to users and manufacturers, either in storage or in transmission. Some manufacturers use detachable design to reduce the storage space of electric wheelchairs. Yet it takes time to disassemble the electric wheelchairs and the operation is also trouble and inconvenient. Thus there is a space to improve the folding of the electric wheelchairs.
Besides the folding problem mentioned above, when the electric wheelchair is moving, the center of gravity of the wheelchair is moved due to the inertia once users brake the wheelchair or lean backwards. This places users in risk for harm.
Thus there is a need to invent novel electric wheelchairs that improve the above shortcomings and have higher practical value.
Therefore it is a primary object of the present invention to provide an electric wheelchair that is folded into a movable luggage or is located into an assistant wheelchair allowing people to sit on by a pivoted member and a connecting member. Thus the electric wheelchair is more convenient to use, either in storage or in transmission. Therefore, the practical value of the electric wheelchair is further enhanced.
In order to achieve above object, an electric wheelchair of the present invention consists of a main frame correspondingly pivoted with a foldable chair while the folding of the chair connects with an accessory tip wheel. Moreover, the main frame is arranged with main wheels and a front wheel set disposed on front of the main wheel correspondingly on each of two sides thereof. A footrest being pulled out or received in the main frame is arranged between the two front wheel sets. In use, the footrest is pulled out of the main frame and the chair is lifted up and unfolded. Simultaneously, the accessory tip wheel tilted a little angle is extended out of the main frame by a connecting member. Thereby the problem caused by movement of the center of gravity of the wheelchair during movement is solved and the safety of users is maintained.
After the chair being folded, the accessory tip wheel is also driven to be received, next to the main wheels. Together with a grip pulled out of the main frame, the accessory tip wheel is used as a rolling wheel for transmission of the folded electric wheelchair being dragged.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
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In summary, compared with the device available now, the electric wheelchairs of the present invention have the following advantages:
Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
