Anti-falling hand-held large-current tester

Abstract

The invention discloses an anti-falling hand-held large current tester. The tester comprises a recovery fastener and a tester main body, wherein the tester main body comprises a display screen, a contact, a control key, a fasteninig groove, a frame, a fastening block, a transparent plate, a groove, a wiring terminal, a first sliding groove, a sliding plate, a sliding block, a top block, a first spring group, a fixed frame and a placement groove; the fixed frame is matched with a writing paperboard; a writing pen is arranged in the placement groove; the recycling fastener comprises a recyclinggroove, a fastening plate and a winding component. The winding component comprises a fixing plate, a winding box, a winding shaft, a rope, a spring box and a volute spiral spring. The recycling grooveis provided with a through groove, second sliding grooves are formed in the two sides of the through groove, the second sliding grooves are matched with L-shaped sliding blocks, the front ends of theL-shaped sliding blocks are integrally connected with ejection blocks matched with the cotton ropes in size, the recycling groove is provided with arc-shaped blocks matched with the cotton ropes in size, and second spring sets are connected between the arc-shaped blocks and the L-shaped sliding blocks.

Description

technical field [0001] The invention belongs to the field of testing instruments, and in particular relates to an anti-dropping handheld high-current testing instrument. Background technique [0002] The current tester is a portable rectifier with high sensitivity and multi-range protection circuit. Its characteristics are: a wide measurement range, a total of 20 ranges, and can measure AC and DC stray voltage and stray current respectively. It does not need a power supply itself. Safe and reliable, it is suitable for testing the current and voltage generated by underground rails, water pipes, cables, etc. in coal mines, preventing premature explosion of electric detonators and other explosion accidents caused by stray current discharge, and reducing the fire source in the mine to a minimum. The current tester, Portable rectifier with multi-range protection circuit. [0003] It is found in the use of the existing hand-held high-current tester: [0004] 1. The display scree...

AI Technical Summary

Problems solved by technology

[0004] 1. The display screen is easy to attach dust when used for a long time, which affects the clarity and then the reading;

[0005] 2. The wiring terminals are exposed outside, which is easy to enter dust and reduce the reliability of use;

[0006] 3. There is no anti-falling structure. When used in some specific environments, if it is accidentally dropped, it will directly cause damage to the tester;

[0007] 4. It is not convenient to record the test data

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