A uPVC door locking mechanism is a complex designed to secure the door at several points along its vertical edge into the frame. Key Components of the Mechanism
The long metal strip that runs vertically along the door's edge, housing the various locking points. upvc door locking mechanism diagram
| Component | Function | |-----------|----------| | | Central unit that translates handle/key movement to rods | | Euro cylinder (key cylinder) | Key-operated cam that retracts or extends the main lock | | Handle spindle | Square bar connecting handles to gearbox | | Top & bottom drive rods | Metal strips transmitting motion to locking points | | Roller cams / hooks / deadbolts | Actual locking elements that engage with the frame | | Strike plates (keeps) | Metal plates on frame where cams/hooks insert | | Snib (lock button) | Small button on handle to lock handle without key (inside only) | A uPVC door locking mechanism is a complex
| Symptom | Likely Component | |---------|------------------| | Key turns but handle won’t lift | Broken gearbox internal cam | | Handle lifts but hooks don’t extend | Broken drive rod clip or rod disconnected | | Door rattles when locked | Worn roller cams or misaligned keeps | | Key spins freely | Snapped Euro cylinder (anti-snap failed) | | Handle stiff | Seized gearbox or bent rods | upvc door locking mechanism diagram