What Causes Cracks in Handheld Barcode Scanners?

A drop is usually the first explanation when a scanner housing cracks.

Daily operation can be much more demanding than a single drop test suggests.

A scanner may hit a shelf, slide across a work surface, collide with another tool, or be placed heavily into a carrying case. Each event may cause little visible damage, but repeated impact can gradually increase stress around corners and edges.

These areas are often more vulnerable because impact forces become concentrated around structural transitions.

That is why handheld scanner housing damage may develop gradually rather than appearing after one obvious accident.

A handheld scanner housing is not mechanically uniform.

Openings, buttons, charging ports, screw locations, seams, and corners all affect how forces move through the housing.

When the device is dropped or struck, stress is distributed according to its geometry.

A protective cover that does not properly reinforce these areas may allow impact energy to reach the original housing.

For this reason, developing a Handheld Smart Terminal case should begin with the actual device geometry rather than simply producing a loose cover with similar dimensions.

WJM's product information states that its protective covers can be molded from the original device and customized for functions including drop, water, oil, scratch, dust, and shock resistance.

Protective material is not automatically better simply because it is thicker.

A thin cover may provide insufficient cushioning. On the other hand, excessive rigidity can reduce flexibility and change how impact energy is transferred.

Silicone can provide a flexible buffer between the device and the external environment.

The final performance, however, depends on several factors:

Material hardness Wall thickness Structural geometry Reinforced areas Contact points

For effective rugged scanner protection, the design should consider device weight, typical handling positions, impact directions, and the environments in which the scanner is actually used.

Handheld scanners may move between warehouses, vehicles, outdoor areas, and temperature-controlled facilities.

Repeated temperature changes can cause materials to expand and contract.

When the device housing, protective cover, and internal components respond differently to temperature changes, additional stress may develop over time.

This is particularly relevant for equipment used in outdoor logistics and industrial inspection.

WJM's testing capabilities include programmable temperature and humidity testing equipment, allowing products to be evaluated under controlled environmental conditions.

For a Smart Terminal Case, environmental testing can reveal potential issues related to dimensional stability, material aging, and component fit.

A protective cover has to do more than cover the device.It must also preserve normal operation.

Important areas include:

Scanner windows Buttons and controls Charging ports Cameras and sensors Hand grips

Poorly designed protection can create operational problems even when the cover itself remains intact.

This is why professional protective covers are normally developed around the original device dimensions and interface layout.

WJM's product range includes PDA & Tablet case, POS device cases, and handheld smart terminal cases, allowing different device structures to be developed with application-specific protection in mind.

Reducing barcode device impact damage requires more than increasing material thickness.

A practical development process should begin by identifying the areas most exposed to impact.

Material hardness and wall thickness can then be matched to the device weight and working environment. Protective structures should be validated through relevant impact, abrasion, and environmental tests.

Long-term fit is also important because a cover that becomes loose, deformed, or damaged after repeated use may no longer protect the device effectively.

The objective is not to create the thickest possible cover. It is to create a protection system that manages impact while maintaining usability and dimensional stability.

Conclusion

Cracks in handheld barcode scanners are rarely caused by one factor alone.Repeated impacts, structural stress, material behavior, temperature changes, and protective design can all contribute to long-term damage.

For equipment used in logistics, warehousing, and industrial environments, a protective cover should be developed around real working conditions rather than treated as a simple accessory.

With in-house tooling development, silicone and plastic manufacturing, and product testing capabilities, WJM can develop protective solutions around the original device structure and application requirements. A suitable combination of material selection, structural design, and validation testing can help reduce damage risk and extend the practical service life of handheld devices.