An integrated bicycle lock has been developed in this thesis to counteract the increasing number of bicycle thefts that occur in Sweden. By integrating a robust user-friendly lock into the bicycle frame, the use of bicycle locks can increase, and the risk of theft thus decreases. The study begins with a literature search that runs throughout the work, where facts and solution proposals have contributed to the final design solution. The methodology has consisted of qualitative interviews leading to customer needs which then laid the foundation for a product requirements specification. From there, Pugh’s Matrix was used which resulted in a combined concept where a foldable lock was integrated in the upper frame tube of the bicycle frame. FEA calculations and material choices have been fundamental to the final design solution. The final product was a design solution that meets the most important customer needs as well as the standard SS-EN 15496: 2008 for bicycle locks and the standard SS-EN ISO 4210–6:2015 for bicycle frames with a combined weight of 1100 grams added to the frame of the bike. / Ett integrerat cykellås har i detta examensarbete tagits fram för att motverka de ökande antalet cykelstölder som sker i Sverige. Genom att integrera ett robust cykellås med god användarvänlighet i cykelns ram kan användningen av cykellås öka och risken för stöld därmed minska. Studien inleds med en litteratursökning som löper genom hela arbetets gång där fakta och lösningsförslag har bidragit till den slutgiltiga konstruktionslösningen. Metodiken har bestått av kvalitativa intervjuer lett fram till kundbehoven som sedan lade grunden till en produktkravspecifikation. Där ifrån utfördes en konceptgenerering som mynnade ut i ett kombinerat koncept där ett länklås integrerats i cykelramens övre ramrör. FEM-beräkningar och sökning efter rätt materialval har varit grundläggande för den slutgiltiga konstruktionslösningen. Resultatet blev en konstruktionslösning som möter de viktigaste kundbehoven samt standarden SS-EN 15496:2008 för cykellås och standarden SS-EN ISO 4210–6:2015 för cykelramar, med en tillagd vikt på ramen av 1100 gram.

The goal with this degree project has been to design a circuit board for an existing bicycle lock that will be able to prevent bicycle theft by sending an alarm. The bicycle lock will be communicating with the radio protocol LoRa and send an alarm with the position to the user. An alarm is detected using an accelerometer which detects changes in movement and the position is obtained with the help of a GPS receiver. The method for the project has been divided into four parts which is the following: component selection, component verification, programming of development card and finally design of circuit board. The components of the system have been tested using Arduino and breadboard to verify that the concept works. After that, a circuit board has been designed that can meet the defined requirements for this work.