Abstract:
The present invention relates to an intermittent locking/unlocking apparatus for a firearm including a rotary cartridge chamber that is intermittently rotated by 90 degrees in a housing to communicate with or interrupt from a barrel, which can fix the rotary cartridge chamber not to be deviated from a position aligned in a straight line with the barrel due to fire or external shock in a state in which the rotary cartridge chamber is arranged in a straight line with the barrel. The apparatus includes a locking groove formed on an outer surface of the rotary cartridge chamber, and a bracket provided on an outside of the housing. When a fixing lever is pivoted around a pivot pin provided on the bracket, a locking protrusion provided at an end of the fixing lever is selectively locked to or unlocked from the locking groove. A lever driving unit rotates the locking protrusion in forward and reverse directions to repeatedly lock or unlock the locking protrusion to or from the locking groove.
Abstract:
본 발명은 용접결합과 볼트결합을 갖는 구조물에 대해서 피탄으로 인한 충격특성을 분석하기 위해 용접결합된 부분과 볼트결합된 부분의 충격데이터를 동시에 획득할 수 있는 시험장치를 제공하는 것을 목적으로 한다. 상기 목적을 달성하게 위해 본 발명은, 피탄시 전투차량 프레임 구조물의 결합부에 대하여 충격특성을 분석하기 위한 충격데이터 획득 시험장치로서, 용접결합된 프레임 구조물에 대한 충격특성을 시험하기 위한 용접부재와, 볼트결합된 프레임 구조물에 대한 충격특성을 시험하기 위한 볼트체결부재와, 상기 용접부재와 상기 볼트체결부재의 충격특성을 감지하는 복수 개의 센서를 구비하는 것을 특징으로 한다.
Abstract:
PURPOSE: A multi-layered impact-resistant panel and a designing method thereof are provided to increase the lifespan of a structure since four kinds of stacked lightweight materials absorb different types of impact energy. CONSTITUTION: A multi-layered impact-resistant panel(10) comprises an aluminum or aluminum alloy surface layer(11), an aluminum-foam intermediate layer(12), a rubber layer(13), and a composite layer(14). The surface layer is located outermost side of the panel. If the panel is shot, the surface layer is damaged and the kinetic energy of bullet is absorbed. The intermediate layer disperses and absorbs impact energy transferred through the surface layer and controls high-frequency energy. The rubber layer controls the energy of low frequency component due to impact. The composite layer absorbs impact energy and inhibits the penetration of shrapnel.
Abstract:
PURPOSE: An impact bullet for testing a ballistic impact and a ballistic impact simulation apparatus using the same are provided to accurately evaluate the impact absorbing performance of a panel through the similar condition with the real by adding the same high-speed impact as a bullet. CONSTITUTION: An impact bullet(10) for testing a ballistic impact and a ballistic impact simulation apparatus using the same comprises an empty cartridge(11), an impact warhead(15), a cartridge belt(13) and a detonator(14). The inside of the empty cartridge is charged with a propellant(12). The impact warhead does not pass through the panel to be tested and is delivered only the impulse quantity, the impact warhead is formed into a cylinder having a flat front side. The impact warhead is combined in the front part of the empty cartridge. In order that the impact warhead is transformed according to the collision with the panel, the impact warhead is made of soft metal. The cartridge belt assembles the empty cartridge and impact warhead. The detonator is formed at the behind of the empty cartridge and ignites the propellant.
Abstract:
본 발명은 용접결합과 볼트결합을 갖는 구조물에 대해서 피탄으로 인한 충격특성을 분석하기 위해 용접결합된 부분과 볼트결합된 부분의 충격데이터를 동시에 획득할 수 있는 시험장치를 제공하는 것을 목적으로 한다. 상기 목적을 달성하게 위해 본 발명은, 피탄시 전투차량 프레임 구조물의 결합부에 대하여 충격특성을 분석하기 위한 충격데이터 획득 시험장치로서, 용접결합된 프레임 구조물에 대한 충격특성을 시험하기 위한 용접부재와, 볼트결합된 프레임 구조물에 대한 충격특성을 시험하기 위한 볼트체결부재와, 상기 용접부재와 상기 볼트체결부재의 충격특성을 감지하는 복수 개의 센서를 구비하는 것을 특징으로 한다.