| 主权项 |
1. A laser engraving device, comprising:
an enclosure housing defining an interior and an exterior and a front opening; a base; an automatic door which defines a closed position, in which said automatic door encloses said front opening and rests on said base, and an open position, in which said automatic door is separated away from said base and opens at least a portion of said front opening to the exterior; a powered linear actuator including a rod having an upper, extended position and a lower, retracted position, said automatic door resting on said rod without being secured to said rod, so that moving said rod from the lower, retracted position to the upper, extended position moves said automatic door to the open position, and moving said rod from the upper, extended position to the lower, retracted position allows said automatic door to fall in a controlled manner, with the automatic door resting on said rod as the automatic door falls from the open position to the closed position, and wherein, if the automatic door encounters an obstruction while falling, the rod will continue to retract and will separate from the automatic door so that the rod will not exert any force on the obstruction. |
