Walking aids are used by a large part of the world's population in everyday life. The need for walking aids increases with age and as the population gets older, the number of users of these products also increases. Research shows that walking aids make it easier to exercise and stay outdoors, which in the long run leads to an increased quality of life. This thesis has been carried out in collaboration with Trustcare, which is a company that develops various types of walking aids. The company has the ambition to expand its product range with a walker which is a kind of walking aid and therefore wants to investigate the main functions of the product and develop detailed ideas for how one of these functions could be more user-friendly. The thesis begins with a first concept generation and an analysis of the functionality of a selected walker is carried out and divided into sub-problems: locking of walking function, folding and height adjustment. After brainstorming and benchmarking, each sub-problem is assigned a number of solutions. In consultation with the client, the sub-problem locking of walking function with the solution spring-loaded sprint is selected for further detailed development. A second concept generation is performed and the solution variant spring-loaded sprint is broken down into additional sub-problems. A number of solutions are developed and together with the client it is decided that a prototype will be developed for the solution variant key with control track. The prototype is constructed in a 3D program and forms the basis for a 3D-printed model. The results are presented in rendered images of the 3D model and through images of the developed prototype for locking the walking function.