| 摘要 |
A welding helmet (10) includes a removable lens cartridge assembly (12) which is slidably received by a slot (14) at the front of the welding helmet. The lens cartridge assembly includes a picture frame slot (20) into which a face lens (24) may be friction fit by insertion from the side. Additional filters and lenses (28) may be held in place within the cartridge by a removable frame assembly (26) that has a plurality of integrally formed but resilient finger extensions (32) which press against the filters as they are placed within the cartridge. The frame assembly mechanically interlocks with the removable cartridge with a plurality of tabs (28) and slots (30). The cartridge assembly itself is also mechanically positively interlocked to the welding helmet with a locating nib (34) and receiving hole (36) near the bottom of the slot. The receiving slot has a front and rear picture frame border (40, 48) which surrounds and encapsulates the removable lens cartridge so that the lens cartridge is mechanically locked in place and captured within a mechanical fixture to avoid its being dislodged upon impact.
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