Oxyma Gives Specially Designed Wheelchair Ergonomic Lift and Better Handling


When Hantverksdesign decided to develop a new specially designed wheelchair, they contacted Oxyma. Their aim was to produce a wheelchair that was more ergonomic for both its user and caregivers. The design also needed to be optimized for rational production at Hantverksdesign’s own production facility.


Oxyma ger specialrullstol ergonomiskt lyft och bättre köregenskaper

Hantverksdesign has specialized in providing physical aids and premium comfort wheelchairs for many years.

In addition to comfort, a host of requirements specifications and a medical devices directive also govern the design of its products, as Hantverksdesign well knows. The solutions that Oxyma produced also needed to be adapted to suit Hantverksdesign’s production facility’s resources and equipment. These factors necessitated close cooperation within the project, and Oxyma’s consultants were on site at Hantverksdesign during the construction phase to make rapid cross-checks with the production side possible.

Stability and Ergonomics

Based on user studies, Oxyma began designing proposals for different aspects of the wheelchair.

“To improve the wheelchair’s handling and balance, we worked a lot on its center of gravity. Because the center of gravity shifts depending on how the patient sits in the chair and the various positions of the seat, back rest, and leg rests, we had to crunch a bunch of numbers to achieve both good stability and ergonomics,” says Erik Björk, Design Engineer at Oxyma. 

It also needed to be easy for both patient and caregiver to access the controls used to adjust the wheelchair. Here, too, Oxyma had to put their thinking caps on to come up with really good solutions.  

“We also succeeded in greatly improving the function of the wheelchair’s knee-joint mechanism in the horizontal position. Now there’s no need to adjust the length of the foot rest when switching to the horizontal position. The cushions and arm rests have also been improved from a purely ergonomic standpoint.”

Flexible Basic Design 

Ronny Melander, CEO at Hantverksdesign, is happy with the result.

“The new wheelchair has significantly better handling and we have heard that users are very happy about that. At the same time, we have succeeded in building a level of flexibility into the chair that means that it can be adjusted to suit different users and needs.

The ability to easily customize the chair to suit different users and needs was another requirement we imposed, because it keeps manufacturing costs down without reducing the breadth of our range. In this regard, Oxyma’s experience in modularization and efficient production methods was helpful.” What’s more, Oxyma also adapted the design to suit Hantverksdesign’s production resources in a rational way. Oxyma’s design engineer, Erik Björk, explains:

“Hantverksdesign are skilled in working with sheet metal, welding, and bending, and have their own varnishing workshop to give their products a really nice-looking finish. We made use of this and based our work on sheet metal designs. By using bent tubes in the chassis, we were able to give the wheelchair a modern and dynamic look.” 

Oxyma—Breadth and Depth

Melander is happy with the results of the project and explains why he chose Oxyma: 

“Oxyma has a breadth of expertise that stretches all the way from project management to design. They also have cutting-edge expertise in calculations and modeling, and, not least, greater capacity. It’s sometimes hard for those of us who work with day-to-day operations to find the time to take on large-scale development projects.”