This report is a part of the course MSGC17 for Bachelor in Mechanical Engineering. The course were held at the University of Karlstad. The project was performed on behalf of a company that manufactures doors. The purpose of the project was to develope a door closing device. The closing device were supposed to be innovative and have an aesthetically pleasing design, since this was lacking in current products. The work resulted in a design proposal for a doorcloser which is recessed in the door leaf. This type of mounting results in a aesthetically pleasing design since it is not visible at all. This result were achieved through the use of the product development process according to Johannesson et al. (2013). This process included a plan for the project, prestudy, concept generation, evaluation and selection, layout design and prototyping. The prestudy was an important part of the project. This part led to many innovative ideas that could be brought into the concept generation phase. The final design proposal was inspired by a cord retractor from a vacuum cleaner. When the design proposal was developed a prototype were made as a final part of the project. The task of the prototype was to show the function of the structure in a simple way. The conclusion to be drawn is that the generated construction meets the requirements of the specification. Further work after this project will be to produce a prototype in full scale for different types of tests.