Modular Aluminum Hinge for Large Advertising Light Boxes

Patent & Production

At a glance

What the claims cover, in plain language

Claim 1 - a large aluminum alloy advertising light box hinge comprising a light box body made of a face frame and a main frame. Key components include a limit strip on the face frame, a movable hinge connected to the face frame edge, and a rotating shaft connecting the movable hinge to a positioning hinge. The positioning hinge attaches to the main frame via a hook. A movable bolt with limiting grooves is threaded into the positioning hinge. An internal strip with a support member and card plate slides in the main frame. Claim 8 specifies a movable locking piece on the internal strip featuring a slider, return spring, and limiting column that engages the bolt’s grooves.

Claims 2-7 - detail specific structural relationships: the triangular shape of the limit strip, the nesting of the hook and positioning hinge, the integrated structure of the positioning block and diagonal brace, the angle of the limiting grooves on the bolt, and the T-shape of the card plate.

This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.

What this means for US production

This patent was filed in China and is currently in force. Making or selling this specific hinge design in China requires the owner’s permission. However, the public record shows no US or other foreign counterpart. Therefore, this patent alone does not restrict manufacturing or selling this design in the United States.

Two items to resolve before launch:

• Other patents may exist. Signage hardware is a competitive field with many existing utility patents regarding latch mechanisms and aluminum extrusions. A freedom-to-operate (FTO) review is recommended to ensure the spring-loaded slider and movable bolt configuration do not infringe on other active US patents.
• Material sourcing. The design relies on aluminum alloy extrusions. Verify supplier capabilities for custom profiles matching the specified triangular limit strips and T-shaped card plates.

Customization and manufacturing

What can be customized

Things to plan for (US market)

• UL 48 / UL 879 - If the light box contains electrical components, the enclosure must meet safety standards for wet locations.
• Wind Load Ratings - For outdoor use, engineering calculations must verify the hinge can resist local wind codes (ASCE 7).
• RoHS/REACH - Compliance for coatings and plastic parts (spring/slider) if exporting globally.

How a project runs

1. Inquiry - Define frame dimensions, load requirements, and finish.
2. Design - CAD modeling of the extrusion profile and hinge interface.
3. Prototype - Fabricated samples for fit and function testing.
4. Pilot run - Small batch production to validate assembly efficiency.
5. Production - Extrusion, die-casting/machining for bolts, injection molding for sliders, final assembly.

Quantities & timeline

Aluminum extrusion dies and injection molds for the locking pieces are the critical path, and surface finishing follows. Send us your target frame size, quantity, and desired finish and we will reply with options.

Production notes

Tooling and process

The primary components rely on aluminum extrusion for the main and face frames, requiring custom dies for the triangular limit strip profile. The movable bolt and positioning hinge likely involve sheet metal fabrication or aluminum extrusion, depending on thickness. The slider and locking piece housing typically use injection molding for consistent spring integration.

Cost drivers

Sheet thickness of the aluminum typically drives material cost and rigidity. Number of parts is significant here; the multi-component hinge (shaft, bolt, slider, springs) increases assembly labor compared to simple butt hinges. Surface finish quality affects powder coating costs.

Prototyping path

We typically start with a 3D model and load check to verify the spring mechanism. Produce a cut and bent sample of the frame to test the nesting grooves. Conduct a load test on the hinge to simulate wind resistance before committing to full tooling.

What we would change before tooling

We might adjust the wall thickness and joint design of the extrusion to reduce weight without losing strength. The hinge boss and pivot wear should be tested with different lubricants. Simplifying the thread engagement and fastener torque specs could speed up field installation.

Common failure points

Insufficient load capacity may cause the face frame to sag if the aluminum gauge is too thin. Tipping is a risk if the center of gravity shifts during opening. Acrylic cracking near the mounting points can occur if the frame flexes too much. Spring fatigue could prevent the lock from engaging after thousands of cycles.

Patent drawings

Drawings reproduced from the public patent document for reference.

Frequently asked questions

How does the tool-free locking work?

The internal strip has a spring-loaded slider. When you push the handle, the slider retracts. When released, the spring pushes a column into one of the angled grooves on the movable bolt. This locks the face frame in place without needing a screwdriver.

Is the aluminum strong enough for large signs?

Yes, the design uses aluminum alloy extrusions. The triangular limit strip and T-shaped card plate reinforce the connection between the face and main frames, distributing stress evenly across the hinge area.

Can I change the poster size?

The hinge mechanism is modular. You can customize the length of the aluminum extrusions to fit different standard poster sizes (like ISO B1 or A0), as long as the weight remains within the hinge’s load capacity.

Does it rust or corrode outdoors?

Aluminum naturally resists corrosion. For coastal or high-pollution areas, powder coating adds an extra protective layer. The steel components like the bolt are typically plated to prevent rust.

How hard is it to assemble?

The frames snap together using the nesting grooves and hooks. The movable bolt threads into the positioning hinge. Once aligned, the spring lock engages automatically. It is designed for quick factory assembly and field maintenance.

What happens if the spring breaks?

The patent describes a replaceable internal strip assembly. If the spring fails, the entire locking unit can usually be swapped out without replacing the whole frame, depending on the specific mold design used in production.

Can this design be made and sold in the US?

The patent is in force in China, but the public record shows no US counterpart. Therefore, this specific patent does not restrict making or selling the design in the US. However, always conduct a freedom-to-operate check for other existing signage patents.

Are you affiliated with the patent owner?

No. IP2M is an independent design and manufacturing service working from the public patent document.

Request a quote

Click Request a Quote below to see our email address - copy it, or open your email app with a ready-made message. Please mention patent CN116312284B in the subject.

Helpful details to include:

• Your company and channel (signage maker, retail brand, event organizer)
• Target frame dimensions and expected poster weight
• Finish preference (color, texture, anodized vs painted)
• Quantity needed for initial order
• Timeline - when you need prototypes or first shipment

You can also reach us at (332) 203-9997.