Gear tooth locking type copper net quick-changing mechanism for field emission transmission electron microscopy

Abstract

The invention provides a gear tooth locking type copper net quick-changing mechanism for a field emission transmission electron microscopy. The quick-changing mechanism is characterized in that the quick-changing mechanism comprises a connecting table, a fixing box, a mounting groove a, a top block, a spring b, a copper net mounting mechanism and a locking mechanism, the connecting table sleeves a sample rod, the fixing box is mounted at the right end of the connecting table, the mounting groove b is formed in the front end surface of the fixing box, mounting grooves a are formed in the left end and the right end of the inner wall of the rear side of the mounting groove b correspondingly, jacking blocks are mounted in the mounting grooves a through springs b, a copper net mounting mechanism is mounted in the mounting grooves b, and locking mechanisms are mounted on the left side and the right side of the copper net mounting mechanism correspondingly. Through designing the locking mechanism, the copper net mounting mechanism can be pulled out only by rotating a rotary knob b, operation is easy, and the probability of misoperation is reduced; and through designing the copper net mounting mechanism, a copper net only needs to be placed in the center of four limiting plates and then is fixed through a pressing plate.

Description

technical field [0001] The invention relates to the technical field of auxiliary devices for field emission transmission electron microscopy, in particular to a gear tooth locking type copper mesh quick change mechanism for field emission transmission electron microscopy. Background technique [0002] The field emission microscope was invented by Muller in 1936, but its importance was not gradually recognized until after World War II. In recent years, the rapid progress of ultra-high vacuum technology has contributed to the development and application of the field emission microscope With the conditions provided, field emission microscopy has become the most important technique in the study of surface phenomena. Using this technique allows us to directly observe the different adsorption properties of different crystal planes and the activities of adatoms or molecules on the surface. In some cases, you can even see the image of individual adsorbed molecules. When changing the...

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Problems solved by technology

[0003] In the above steps of replacing the copper mesh, it is necessary to use a special tool to lift the clamp of the sample copper mesh support metal sheet with one hand, and at the same time use a large pinch to clamp the copper mesh support metal sheet with the other hand. When both hands work at the same time, the operation is more laborious , the probability of operating errors increases, and it is easy to cause damage to the copper mesh. During the replacement process, it is necessary to loosen and tighten the fixing screws with a screwdriver, and when putting in a new copper sheet, it is necessary to observe the position while Placement, the operation is cumbersome, time-consuming and labor-intensive, and it is easy to cause the wrong placement of the copper grid, which affects the normal use of the copper grid

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