A circuit board locking device with damping and vibration reduction functions

Abstract

The invention relates to a circuit board locking device with the function of damping and vibration reduction, which includes two parts, a damping locking strip and a damping mounting plate, both of which are rubber-metal integrated structures, and is mainly used for plug-in printed circuit boards (PCBs). Install. In the present invention, the high-damping rubber material can convert dynamic energy into elastic potential energy and heat energy of the rubber under harsh mechanical environments, so that the dynamic response of the PCB is reduced; The locking structure enables the device to have a locking function, thereby ensuring the reliability of the PCB. In addition, the device can also be used in conjunction with the traditional three-section or five-section locking strip to form a so-called adjustable damping locking device, which can effectively improve the mechanical environment of the PCB.

Description

technical field [0001] The invention relates to a circuit board locking device, in particular to a circuit board locking device with a damping and vibration reduction function, which belongs to the technical field of rubber vibration reduction and is mainly used for the damping and vibration reduction and locking installation of printed circuit boards. Background technique [0002] Plug-in printed circuit board (PCB) has the characteristics of simple structure, convenient installation and maintenance, etc., so it is widely used in military electronic equipment. The side is fixed with rigid locking parts such as figure 1 , figure 2 , image 3 shown. In stages such as rocket launch, missile maneuvering, star-rocket separation, and spacecraft landing, severe broadband vibrations and shocks will be generated. image 3 The rigid locking bar structure used will cause the magnitude of the dynamic load on the PCB to be amplified. If the magnitude of vibration and shock exceeds...

AI Technical Summary

Problems solved by technology

[0006] The method of constrained damping treatment is difficult to achieve good results due to the complexity of the process, and the large number of electronic components on the PCB and the uneven surface.

[0007] Figure 4 The T-shaped shock absorber structure shown is composed of a T-shaped shock absorber, a limit washer and a limit bushing. The limit bush and the limit washer are used together to limit and install. However, due to the narrow space of the PCB board slot and the thickness of the PCB is only 1-2mm, it is impossible to install the T-shaped shock absorber reliably

[0008] Figure 5 The metal-rubber composite structure shock absorber shown can achieve three-way equal stiffness through structural design, but it requires a large installation space and brings a lot of additional weight, and because the mass of the PCB is too small, it cannot effectively reduce the response of the low-frequency part

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