A printed board wedge locking device

Abstract

The invention provides a printed board wedge locking device comprising a guide rail (1), a slider (2), a fixing block (3), a countersunk head hollow rivet (4), an extrusion block (5), a bolt (6), a spring (7) and a knob (8). One end of the guide rail (1) is fixed on the fixing block (3) through the countersunk head hollow rivet (4); the slider (2) and the extrusion block (5) are located in a guide groove the guide rail (1) and can move along the guide rail (1). The bolt (6) is fixed in a threaded hole (9) in one end of the guide rail (1) after penetrating through the knob (8), the extrusion block (5) and the spring (7) in turns. The knob (8) is matched with the bolt (6) through threads. When being rotated, the knob (8) can move axially along the bolt (6), extrude the extrusion block (5) and make the slider (2) protrude. The printed board wedge locking device is simple in structure, low in cost, light in weight, good in heat conduction and electric conduction effects and high in reliability.

Description

technical field [0001] The invention relates to a locking device, in particular to a wedge-shaped locking device for a printed board. Background technique [0002] At present, a large number of printed board wedge locking devices are mainly divided into screw type wedge locking devices and slide rail type wedge locking devices. For the screw-type wedge locking device, please refer to "SJ 20382-2007 Specification for Wedge Locking Device". Poor performance, it is difficult to meet the requirements of lightweight design; slide rail wedge locking device, some use a loose notch on the guide rail to prevent the screw from falling off, such as the product of CALMARK company; some use a tight lock on the guide rail Screws, such as a printed board locking device of our company with the patent number of ZL 2010 1 0609639 1. However, in practical applications, the above two types of slide rail wedge locking devices, because the aluminum alloy material is softer than stainless steel,...

AI Technical Summary

Problems solved by technology

For the screw-type wedge locking device, please refer to "SJ 20382-2007 Specification for Wedge Locking Device". Poor performance, it is difficult to meet the requirements of lightweight design; slide rail wedge locking device, some use a loose notch on the guide rail to prevent the screw from falling off, such as the product of CALMARK company; some use a tight lock on the guide rail Screws, such as a printed board locking device of our company with the patent number: ZL 2010 1 0609639 1

However, in practical applications, the above two types of slide rail wedge locking devices, because the aluminum alloy material is softer than stainless steel, after repeated rotation, the thread in the aluminum alloy guide rail and the stainless steel screw rotate for a long time, which is prone to slipping.

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