Truss-Type Foldable Desk Lamp with Longitudinal and Transverse Guide Adjustment

The problem

Task lamps need to cover a wide area above a desk, but many adjustable arms rely on tight friction joints that wear out, making the lamp droop or shake during adjustment. Reaching different heights and distances usually requires loosening multiple knobs one by one. When the arm is extended far from the base, the center of gravity shifts, causing instability or requiring heavy, bulky bases to compensate. Users also experience jerky movements when releasing a locked joint under tension, which makes fine positioning difficult.

The solution

This lamp separates vertical and horizontal movement into two distinct guide devices mounted on a base.

1. The longitudinal guide device uses a first support rod pivoting on the base. A first sliding assembly moves along one side, while a counterweight assembly moves along the opposite side, linked by a traction rope.
2. A longitudinal locking mechanism uses friction blocks pressed against the inner wall of the first support rod by locking sliders.
3. The transverse guiding device features a second support rod carrying the lampshade. A second sliding assembly slides along this rod and rotates on the first sliding assembly.
4. Inside the second sliding assembly, an isosceles trapezoid-shaped avoidance hole receives a first boss from the vertical slider. Two first springs press against the upper and lower surfaces of this boss to keep the horizontal arm level.
5. Tilting the second support rod turns shifting shafts that pull the locking sliders inward, releasing the vertical lock without extra levers.
6. A pneumatic transverse locking mechanism secures the horizontal position, operated by a pneumatic unlocking driving mechanism on the lampshade through a telescopic connecting pipe.

Who it is for

• Lighting brands and OEM buyers looking for a task lamp architecture that offers smooth dual-axis adjustment without standard knob-and-clamp joints.
• Office furniture suppliers needing desk lamps that maintain stability across a wide working surface while folding flat for shipping or storage.
• Architectural and drafting equipment distributors serving professionals who require precise, repeatable light positioning over large drawing boards.
• Amazon sellers and e-commerce retailers offering differentiated home-office lighting with mechanical features that stand apart from basic gooseneck models.

How it works

The main parts

Operating steps

1. To lower the lamp: Press down on the second support rod. The rod tilts, compressing one of the first springs. The shifting shafts enter the strip-shaped holes of the locking sliders, pulling the friction blocks away from the first support rod’s inner wall. The first sliding assembly is now free to slide down, assisted by the counterweight moving up via the traction rope.
2. To raise the lamp: Apply upward force to the second support rod. The same tilting action releases the longitudinal lock, allowing the user to lift the lamp while the counterweight descends.
3. To lock the height: Release the pressure on the second support rod. The first springs push the second sliding assembly back to its neutral angle. The shifting shafts release the locking sliders, and the second spring forces the friction blocks back against the inner wall of the first support rod.
4. To adjust horizontally: Actuate the pneumatic unlocking driving mechanism on the lampshade. Air travels through the telescopic connecting pipe to retract the first piston and second friction block, freeing the second sliding assembly to move along the second support rod. Release the mechanism to lock again.

Applications

Home office desks

Users working at computers frequently shift between reading documents and typing. The dual-axis sliding allows the lampshade to move out of the way horizontally or drop closer vertically without unclamping joints, keeping the desk clear.

Drafting and architecture studios

Drafting tables require light to be positioned precisely over specific areas of a large blueprint. The counterweight system lets the user glide the lamp to a new spot with minimal effort, while the friction lock prevents drift once placed.

Workbenches and hobby stations

Model builders and electronics technicians need focused light that stays rigid. The pneumatic transverse lock and the friction-based vertical lock prevent the arm from sagging under vibration or accidental bumps during detailed work.

Retail display counters

Jewelry or watch displays benefit from directed lighting that can be folded flat when the counter is closed. The truss structure folds neatly, and the locking mechanisms ensure the light points exactly at the displayed items during business hours.

Where it is less suitable

• Bedside reading lamps - the mechanical sliding tracks and exposed rods take up more visual space than a simple bedside fixture.
• Outdoor or damp environments - the pneumatic components, springs, and open sliding tracks are designed for indoor use.
• Lowest-cost promotional lighting - the number of machined parts, pneumatic elements, and springs places this in a higher manufacturing tier than basic clip-on lights.