Universal circuit board clamp

Abstract

The invention discloses a universal circuit board clamp. The clamp comprises two pedestals of the same structure, the two pedestals are arranged in mirror symmetry, each pedestal is provided with one or more fixing assembly for fixing a circuit board, the circuit board is vertically fixed between the two pedestals via the fixing assemblies, each fixing assembly comprises a fixed block, a movable block and an adjusting screw, the fixed block is fixed on the pedestal and used to fix the upper end of the circuit board, and the movable block sleeves the adjusting screw, rises or falls with rotation of the adjusting screw, and is used to fix the lower end of the circuit board when being adjusted to a proper position. The universal circuit board clamp is simple and compact in structure, convenient and rapid in operation, high in university and high in stability.

Description

technical field [0001] The invention mainly relates to the field of circuit board testing equipment, in particular to a universal circuit board fixture used for stress testing of rail transit products. Background technique [0002] At present, when the circuit boards of rail transit products are subjected to strengthening tests, accelerated life tests or accelerated degradation tests, vibration stress or a combination of multiple stresses are often used for testing. In order to truly restore the working conditions of the circuit board to be tested, it is necessary to use fixtures to fix the circuit board product to be tested on the test platform for stress testing by comparing with the field method of vertical installation or flat installation. The fixture is mainly used to fasten the circuit board and transmit vibration or comprehensive stress. This requires that the designed fixture must ensure sufficient rigidity, withstand the high temperature and high humidity air in th...

AI Technical Summary

Problems solved by technology

[0003] (1) The existing fixtures are not universal enough. It is necessary to design and manufacture the clamping device according to the hole size of the circuit board of different specifications and the spacing of the screws. It is often necessary to design multiple fixtures of different sizes separately, resulting in protracted test periods and high test costs. , with more and more test products, each test product may correspond to a fixture model, which consumes a lot of time and funds and other resources, and greatly affects the test progress

[0004] (2) The stability of the existing fixture is not enough. When performing vibration stress or multiple stress comprehensive tests, the fixture is easy to cause loosening, which makes the clamped circuit board loose, which may cause the circuit board to fall, contact short circuit, circuit board Risks such as damage, not only make the test invalid, but also cause material waste and increase work costs

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