Multifunctional Screwdriver with a Sliding Bit Changer and Locking Plate

The problem

Multi-bit screwdrivers are common in workshops and homes, but changing the bit usually involves pulling one out by hand and pushing another in. Small bits are easy to drop, especially when working overhead or in dim light. Manual chucks can wear out or jam, making swaps slow. Furthermore, many multi-bit tools are difficult to open for internal cleaning if dust or debris gets inside the storage chamber. A mechanism is needed that advances the bit automatically when the handles move together, holds it securely during driving, and allows the user to separate the tool halves without specialized factory equipment.

The solution

1. The screwdriver has two main body sections: a pull end (1) and a rear lug (2), with the pull end slidably socketed over the rear lug.
2. A push rod (3) is fixed inside the rear lug and extends forward.
3. A runner (4), acting as a rotating turret, is mounted on the pull end. It holds driver bits (5) of different models around its circumference.
4. When the user slides the pull end toward the rear lug, the push rod passes sequentially through the runner, contacting the selected driver bit and pushing it out to the operating position.
5. A locking plate (6), formed as an elastic collet, sits at the inner back end of the pull end and extends toward the push rod.
6. The push rod features a locked groove (31), shaped as a cone groove along its circumference. The locking plate snaps into this groove to limit the sliding distance between the pull end and the rear lug, keeping the bit extended and locked.
7. For disassembly, the pull end has an inner handle hole (11) and the rear lug has an outer handle hole (21). When the locking plate is seated in the groove, these holes align. Inserting a tool through them causes the locking plate to elastically deform, unlocking it from the groove so the pull end and rear lug can be pulled apart. A folding block (7) covers the outer handle hole.

Who it is for

• Hand tool brands looking for a multi-bit screwdriver with a mechanical deployment action rather than a manual chuck.
• Amazon private-label sellers needing a distinct, demonstrable feature—sliding the handle to pop out the bit—for product videos and listings.
• Wholesalers supplying hardware stores who want a compact all-in-one driver that reduces loose bits lost by retail customers.
• Promotional product companies sourcing branded tools where the folding block and handle shape offer visible areas for logo printing.

How it works

The main parts

Operating steps

1. Select the bit - rotate the runner on the pull end until the desired driver bit aligns with the push rod.
2. Deploy the bit - push the pull end toward the rear lug. The push rod slides through the runner and forces the selected bit out to the operating position.
3. Lock - the elastic locking plate snaps into the cone groove on the push rod, stopping further travel and securing the bit.
4. Drive screws - use the tool normally; the locked groove prevents the handles from separating under pressure.
5. Disassemble - fold back the block to expose the outer handle hole. Insert a tool through the aligned outer and inner handle holes to press the locking plate. The elastic deformation releases the plate from the groove, allowing the pull end to slide off the rear lug for cleaning or bit replacement.

Applications

Home repair kits

Homeowners keep one tool instead of a set of individual screwdrivers. The rotating runner stores multiple bit models, and the slide action deploys the right one without searching through a case.

Electronics assembly benches

Technicians frequently switch between Phillips, slotted, and Torx sizes. Pushing the handle forward seats the new bit instantly, saving time during repetitive board-level work.

Field service technicians

Appliance and HVAC repair workers carry heavy bags. A single sliding-handle screwdriver replaces several fixed drivers, and the folding block keeps the disassembly hole sealed against job-site dust.

Retail blister packs

The distinct mechanical action—sliding the handle to extend the bit—is easy to demonstrate on packaging graphics. Tool buyers understand the function immediately without reading instructions.

Where it is less suitable

• Heavy-duty construction framing - the sliding plastic body and internal push rod are designed for general fastening, not high-torque structural lag bolts.
• Insulated electrical work - the patent does not describe dielectric materials or VDE ratings required for live circuits.
• Precision watchmaking - the bits and runner are sized for standard hardware, not microscopic horology screws.