CN211292646U

CN211292646U - Ultrathin sample clamp

Info

Publication number: CN211292646U
Application number: CN201922235653.9U
Authority: CN
Inventors: 杨中秋; 杨中琴; 庄超
Original assignee: Shanghai Baishu Optoelectronic Technology Co ltd
Current assignee: Shanghai Heqin Optoelectronic Technology Co.,Ltd.
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-08-18
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses an ultrathin sample clamp, wherein the bottom ring comprises a vertical part and a horizontal part, the vertical part is a hollow annular structure, and the horizontal part is an annular convex edge which is arranged towards the ring center direction from the bottom of the annular structure of the vertical part and has a first width along the radial direction; the compression ring is provided with a notch; the inner wall of the vertical part of the bottom ring is provided with a clamping structure or an inclined plane structure. The utility model discloses anchor clamps are used for the centre gripping operation of electron microscopic observation field millimeter level sample carrier, can prevent effectively that the carrier from warping at the atress of operation in-process, can realize harmless recovery carrier, and fixed mode is convenient, firm reliable be difficult for droing.

Description

Ultrathin sample clamp

Technical Field

The utility model relates to a fixture assembly technical field especially relates to be used for electron microscope to observe sample carrier mounting fixture technical field.

Background

In the field of electron microscopy, particularly transmission electron microscopy, it is often necessary to control the thickness of a sample to be on the order of nanometers in order to pursue ultra-high resolution. However, the nanoscale sample is often difficult to be directly fixed or clamped, and in order to solve the problem, a porous net with a thickness of about 10-20 um is usually used as a sample carrier, such as a nylon net, a copper net, a nickel net, a molybdenum net, a gold net, and the like, so as to disperse or distribute the nanoscale sample to be observed on the sample carrier. The specific operation flow is as follows: and (3) dropwise adding or flatly paving the sample on the carrier, then placing the carrier into a tabletting clamping groove for fixing, and carrying out microscopic observation. However, although this solution can solve the observation requirement, it has a drawback: because the carrier is small in size, the diameter is only about 3 millimeters generally, the thickness is only micron-sized, and the carrier can deform after being stressed in the fixing process of the tabletting clamping groove, so that a sample can be observed only once, experimental data cannot be repeated, and the carrier is fatal to rigorous scientific research. Therefore, the development of the clamp and the carrier fixing mode which can recover the carrier without damage and realize repeatable sample observation has very important significance.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides an ultra-thin sample anchor clamps, includes end ring and clamping ring, its characterized in that:

the bottom ring comprises a vertical part and a horizontal part, the vertical part is of a hollow annular structure, and the horizontal part is an annular convex edge which is arranged at the bottom of the annular structure of the vertical part towards the direction of the ring center and has a first width along the radial direction; the compression ring is provided with a notch; the bottom ring and the pressure ring are respectively positioned on two sides of the sample carrier; the inner diameter of the annular convex edge of the horizontal part of the bottom ring is smaller than the outer diameter of the sample carrier.

Furthermore, the inner diameter of the annular convex edge of the bottom ring is 2-10 mm.

Furthermore, the inner wall of the bottom ring is provided with a clamping and embedding structure. Preferably, the clamping structure is an annular groove or an annular wedge angle groove. Furthermore, the included angle between the annular wedge angle groove and the upper surface of the annular convex edge ranges from 45 degrees to 90 degrees.

Furthermore, the axial height of the clamping and embedding structure is 100-150 mu m, and the radial depth of the clamping and embedding structure is 30-100 mu m.

Furthermore, the inner wall of the pressure ring is provided with an inclined plane structure. The included angle between the inclined plane structure and the upper surface of the annular convex edge ranges from 90 degrees to 135 degrees.

The utility model has the advantages that:

in the ultrathin sample clamp, the bottom ring and the compression ring clamp the carrier of the sample to be tested in the middle to form a sandwich clamping structure, so that the dropping of the sample carrier and the deformation in the operation process are effectively prevented, and the sample can be repeatedly utilized; the structure of the gap formed on the circumference of the pressure ring can facilitate the operation of placing and taking out the pressure ring; the clamping and embedding structure is arranged on the inner wall of the vertical part of the bottom ring, so that a part of the pressure ring can be embedded into the clamping and embedding structure, the clamped sample carrier is pressed and fixed, the pressure is uniformly applied in the circumferential direction of the sample carrier, the carrier is prevented from deforming, and the pressure ring can be prevented from falling off and losing from the bottom ring; the inclined plane structure is arranged on the inner wall of the vertical part of the bottom ring, so that the inner wall of the vertical part of the bottom ring forms an opening with the diameter gradually increasing from bottom to top in the axial direction, an operator can place and slide a sample carrier into the bottom of the bottom ring without the need of aligning accurate operation, the process of placing the sample carrier is easier to operate, and meanwhile, the sample carrier can be prevented from colliding with the wall surface or deforming due to extrusion in the placing process.

Drawings

Fig. 1 is the schematic diagram of the unassembled structure of the ultra-thin sample fixture of the present invention.

Fig. 2 is the utility model discloses an assembled back structure schematic diagram of ultra-thin sample anchor clamps.

Fig. 3 is a schematic view of a cross-sectional structure of a bottom ring a-a of the ultra-thin sample holder according to the first embodiment of the present invention.

Fig. 4 is a schematic view of a cross-sectional structure of a bottom ring a-a of the ultra-thin sample holder according to a second embodiment of the present invention.

Fig. 5 is a schematic view of a cross-sectional structure of a bottom ring a-a according to a third embodiment of the ultra-thin sample holder of the present invention.

Fig. 6 is a schematic view of a cross-sectional structure of a bottom ring a-a according to a fourth embodiment of the ultra-thin sample holder of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1-3 schematically show the structure of a first embodiment of the ultra-thin sample holder according to the present invention. The ultrathin sample clamp comprises a bottom ring 1 and a pressure ring 2, wherein the bottom ring 1 comprises a vertical part 11 and a horizontal part 12, the vertical part 11 is of a hollow annular structure, and the horizontal part 12 is an annular convex edge which is arranged at the bottom of the annular structure of the vertical part in the ring center direction and has a first width along the radial direction; the pressing ring 2 is of an annular structure with a notch, and in the embodiment, the pressing ring 2 is a C-shaped ring; the bottom ring 1 and the pressure ring 2 are respectively positioned at two sides of the sample carrier 3; the horizontal part 12 of the bottom ring 1 has an annular convex rim with an inner diameter smaller than the outer diameter of the sample carrier 3, thereby forming a hold for the sample carrier after it has been placed in the vertical part 11 of the bottom ring 1. In this embodiment, the sample carrier 3 is a copper mesh for observing a sample by a transmission electron microscope, the outer diameter of the copper mesh is 3mm, and the inner diameter of the annular convex edge 11 is 2.5 mm. In other embodiments, the dimensions of the bottom ring 1, the pressure ring 2, the vertical part 11 and the horizontal part 12 of the bottom ring 1 may be designed and adjusted according to the specific dimensions of the sample carrier 3 to be clamped.

Fig. 2 is a schematic structural view of the ultra-thin sample clamp of the present invention in an assembled state. The bottom ring 1 is positioned at the lowest part, a horizontal part 12 at the bottom of a vertical part 11 of the bottom ring 1 is annularly protruded to bear and place a sample carrier 3 with a surface loaded with a nano-scale sample, and the side wall of the vertical part 11 of the bottom ring 1 surrounds the periphery of the sample carrier 3 to limit the sample carrier 3; the compression ring 2 is pressed on the sample carrier 3 arranged in the bottom ring 1, so that a sandwich structure is formed to clamp and fix the sample carrier 3. In the present embodiment (as shown in fig. 3), the inner side wall of the vertical portion 11 of the bottom ring 1 is a vertical wall surface; the clamping ring 2 is a C-shaped ring, a notch is formed in the circumference of the clamping ring 2, and the notch can facilitate an operator to place the clamping ring 2 into or take the clamping ring out of the bottom ring 1 by using tools (such as tweezers).

Fig. 4 is a schematic view of a cross-sectional structure of a bottom ring a-a of the ultra-thin sample holder according to a second embodiment of the present invention. The inner wall of the vertical part 11 of the compression ring 1 is provided with a clamping and embedding structure, and in the embodiment, the clamping and embedding structure is an annular groove 13 formed in the inner wall of the vertical part 11 of the bottom ring 1. Put into end ring 1 inner wall with clamping ring 2 and press the in-process in sample carrier 3 top, can make clamping ring 2 cause the circumference girth shrink of certain degree because the existence of breach on the 2 circumferences of clamping ring, 2 diameters of clamping ring diminish to being less than the 11 open-top sizes in the vertical portion of end ring, place clamping ring 2 and release behind the protruding edge top of horizontal part 12 annular of end ring 1 bottom, the radial extrusion force that clamping ring 2 received disappears, make it resume to normal size, thereby partly imbed in the annular groove 13 that end ring 1 inner wall was seted up, fix and exert pressure evenly the sample carrier 3 of centre gripping from this. The annular groove 13 also effectively prevents the pressure ring 2 from falling off and being lost from the bottom ring 1 during transportation or handling. In the present embodiment, the axial height of the snap-fit structure of the annular groove 12 is 100 μm, and the radial depth is 50 μm. In other embodiments, the dimensions of the snap-fit structure may be designed and adjusted according to the specific dimensions of the sample carrier 3 and the pressure ring 2 to be clamped.

Fig. 5 is a schematic view of a cross-sectional structure of a bottom ring a-a according to a third embodiment of the ultra-thin sample holder of the present invention. And the inner wall of the vertical part 11 of the compression ring 1 is provided with a clamping and embedding structure. Unlike the second embodiment, in the present embodiment, the snap-fit structure is an annular wedge groove 13' formed in the inner wall of the vertical portion 11 of the bottom ring 1. The annular wedge angle groove 13' is an inclined plane annular groove forming a certain included angle with the upper surface of the annular convex edge 11, and the included angle alpha is 45-90 degrees. The structure of the annular wedge groove 13' is easier to machine than the annular groove structure in the second embodiment.

Fig. 6 is a schematic view of a cross-sectional structure of a bottom ring a-a according to a fourth embodiment of the ultra-thin sample holder of the present invention. In the present embodiment, the inner wall of the vertical part 11 of the bottom ring 1 is provided with a slope structure 14. Furthermore, the included angle beta between the inclined plane structure and the upper surface of the annular convex edge is 90-135 degrees, so that an opening with the diameter gradually increased from bottom to top along the axial direction is formed on the inner wall of the vertical part 11 of the bottom ring 1. This structure can make operating personnel need not the accurate operation of alignment just can put into and the landing is on the protruding edge of horizontal part 12 annular of bottom ring 1 bottom, makes the process of placing change in operation more easily, can also prevent simultaneously that sample carrier 3 from colliding with the wall or the deformation that the extrusion leads to at the in-process of placing.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "both ends", "both sides", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "upper," "lower," "primary," "secondary," and the like are used for descriptive purposes only and may be used for purposes of simplicity in more clearly distinguishing between various components and not to indicate or imply relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The utility model provides an ultra-thin sample anchor clamps, includes end ring and clamping ring, its characterized in that:

the bottom ring comprises a vertical part and a horizontal part, the vertical part is of a hollow annular structure, and the horizontal part is an annular convex edge which is arranged at the bottom of the annular structure of the vertical part towards the direction of the ring center and has a first width along the radial direction;

the compression ring is provided with a notch;

the bottom ring and the pressure ring are respectively positioned on two sides of the sample carrier; the inner diameter of the annular convex edge of the horizontal part of the bottom ring is smaller than the outer diameter of the sample carrier.

2. The ultrathin sample fixture of claim 1, wherein the annular ledge of the bottom ring has an inner diameter of 2-10 mm.

3. The ultra-thin sample holder as claimed in any one of claims 1 to 2, wherein the inner wall of the vertical portion of the bottom ring is provided with a snap structure.

4. The ultrathin sample fixture of claim 3, wherein the clamping structure has an axial height of 100-150 μm and a radial depth of 30-100 μm.

5. The ultra-thin sample holder of claim 3, wherein the snap-fit feature is an annular groove or an annular wedge groove.

6. The ultrathin sample fixture of claim 5, wherein the annular wedge angle groove forms an angle of 45-90 degrees with the upper surface of the annular convex edge.

7. The ultra-thin sample holder as claimed in any of claims 1-2, wherein the inner wall of the vertical part of the pressure ring is provided with a bevel structure.

8. The ultrathin sample fixture of claim 7, wherein the included angle between the bevel structure and the upper surface of the annular convex edge is 90-135 degrees.