Ruler suitable for dark environment

• Main Authors: XU JINGSHAN, XU SHUWEI, MIN XIANGLING
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2020
• Subjects: ACCESSORIES FOR WRITING OR DRAWING; ARTICLES FOR WRITING OR DRAWING UPON; BLASTING; BUREAU ACCESSORIES; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; TRANSPORTING; WEAPONS; WRITING OR DRAWING IMPLEMENTS

The utility model provides a straight ruler suitable for dark environment, which comprises a straight ruler body made of transparent plastic material, a lamp groove is arranged in the straight ruler body, an LED lamp strip is embedded in the lamp groove, a plurality of LED lamp cores are arranged on the upper surface of the LED lamp strip, and a plurality of LED lamp beads are arranged on the lower surface of the LED lamp strip. A battery groove is further formed in the end, located in the lamp groove, of the upper surface of the ruler body, a button touch switch is fixedly arranged in the battery groove through a fixing plate, and a button battery is further arranged at the position, located below the button touch switch, in the battery groove. At night or in rainy days, when the straightruler is used for working, students can press the button to lightly touch and turn on the light, so that the button cell and the LED lamp wick form a closed loop, the LED lamp wick emits light, and the scale position of the