Customizing a Thumbturn Holder for Qrio Smart Lock

Introduction

Yearning for a life with auto-locking doors, I bought a smart lock, Qrio Lock (Q-SL2). It can be purchased here. Unfortunately, my home's thumbturn (a lock knob on the door's inside) was slightly atypical, and the stock thumbturn holder provided with the Qrio Lock did not fit.

So, I decided to craft my own thumbturn holder.

Qrio Lock Design

The Qrio Lock features four protrusions on its rotating component, which are intended to fit into the thumbturn holder.

Understanding the Thumbturn Holder

First, I examined the mechanics of the included thumbturn holder. Three sizes are provided: S, M, and L. The surface that attaches to the door looks like this:

There are gaps to accommodate the lock knob. S has the smallest gap, and L the largest. The reverse side, which attaches to the Qrio Lock, appears as follows:

There are four holes where the Qrio Lock's protrusions fit. The dimensions are straightforward, suggesting the feasibility of creating a custom thumbturn holder.

Creation

Here is the final product! ... Admittedly, not the most stylish.

The black component is the thumbturn (door knob), with the wood piece serving as the custom holder. Surprisingly, it functions efficiently.

Materials

Wood

I calculated that a 30x30x15mm wood piece was necessary (adjust according to your lock's shape and install location). I found a 60x30x15mm piece at a dollar store, which I halved for use.

Zip Ties

To hold the thumbturn securely, a zip tie is used around the wood’s perimeter, easily purchased at dollar stores.

Tools

Here's a list of the tools I used:

Saw

Used for cutting the wood. A reasonably large saw simplifies the task. In the photo, the saw is rather small, which made the cutting more time-consuming.

Drill

To create holes for the Qrio Lock’s protrusions. I used a 5mm manual hand drill. It can be purchased here. Electric drills are also suitable.

Crafting Process

Here's the crafting sequence:

• Cut the wood into two pieces using a saw
• Sandwich the thumbturn between the two wood pieces
• Secure with zip ties
• Drill holes as necessary

Installation

Sandwich the thumbturn with the wood, secure with zip ties, and insert the Qrio Lock into the pre-drilled holes to complete the installation.

Conclusion

Despite its unattractive appearance, the holder functioned perfectly as intended. I'm pleased to have once again made an IoT-inspired post.