Sample feeding needle collision preventing mechanism

• Main Authors: MIAO XINLI, FANG CHANG
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a sample feeding needle collision preventing mechanism. During collision, a needle tube, a sampling needle poking sheet and a mounting elastic sheet move upward relative to aneedle tube fixing base, an elastic component is compressed, the sampling needle poking sheet touches a detection switch, and the detection switch sends a signal to control disconnection of a power supply through a PCBA board so as to achieve the purpose of stopping working of the whole mechanism, so that a sample feeding needle is prevented from being damaged; after collision ends, under the elastic action of the mounting elastic sheet, the sampling needle poking sheet and the mounting elastic sheet return to original positions. The sample feeding needle collision preventing mechanism in a moving state can be stopped in a collision state. 本发明涉及种加样针防撞机构，当发生撞击时，针管、取样针拨片和安装弹片相对于针管固定座向上运动，弹性件被压缩，取样针拨片触碰检测开关，通过检测开关发送信号通过PCBA板来控制电源断开，从而达到整个机构停止工作的目的，防止加样针的损坏。撞击解除后，在安装弹片弹力作用下，取样针拨片和安装弹片恢复原位。本发明的加样针防撞机构，能够在撞击状态下停止运动的加样针防