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Novel circuit board locking device with damping vibration attenuation function

A damping and circuit technology, which is applied in the direction of printed circuit components, printed circuit stress/deformation reduction, etc., can solve the problems of large installation space, small PCB quality, and many electronic components, so as to meet the compression requirements and small PCB changes , Improve the effect of the mechanical environment

Active Publication Date: 2020-09-08
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Novel circuit board locking device with damping vibration attenuation function
  • Novel circuit board locking device with damping vibration attenuation function
  • Novel circuit board locking device with damping vibration attenuation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] An inertial measurement combination box is subjected to random vibration of 28.96g. After measurement, the vibration level of its in-line circuit board assembly has reached 62.48g. During the test, the circuit board components will appear loose and fall off. can not work. After failure analysis, it is decided to adopt the present invention for both the motherboard and the three direct plug-in boards.

[0053] Motherboard with the present invention: total length L=144, width b=7mm, width of the rubber part of the damping locking strip and the length of the locking structure of the arc-shaped protrusion of the restraining plate of the damping locking strip l=9mm, between the rubber parts of the damping locking strip The gap a=36mm, the thickness H of the rubber part of the damping locking strip is 6mm, the thickness of the restraining plate of the damping locking strip t1=1mm, the height of the arc-shaped convex locking structure h1=1mm, and the thickness t2 of the base p...

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PUM

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Abstract

The invention relates to a novel circuit board locking device with a damping vibration attenuation function, which comprises two parts, namely a damping locking strip and a damping mounting plate, which are both of a rubber-metal integrated structure and are mainly used for mounting a plugboard type printed circuit board (PCB). In a severe mechanical environment, the high-damping rubber material can convert dynamic energy into elastic potential energy and heat energy of rubber, so that the dynamic response of the PCB is reduced; and on the other hand, the device has a locking function due to the arc-shaped bulge locking structures on the damping locking strip and the damping mounting plate, so that the use reliability of the PCB is ensured. Besides, the novel circuit board locking device can be used in cooperation with a traditional three-section type or five-section type locking strip to form the adjustable damping locking device, and the mechanical environment of the PCB is powerfully improved.

Description

technical field [0001] The invention relates to a circuit board locking device, in particular to a novel circuit board locking device with damping and vibration reduction functions, 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 e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/02
CPCH05K1/02H05K1/0271
Inventor 李晓颜赵川王雅琪王建月周鹏孙妮娟
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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