Sample clamping device of transmission electron microscope

By designing a sample clamping device for supporting tables and adsorption tubes in a transmission electron microscope, the problem of unstable clamping of tweezers is solved, and the stable and safe delivery of samples is achieved, avoiding sample damage and drop.

CN222281916UActive Publication Date: 2024-12-31HEFEI KAIYAN TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421114972.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-21
Publication Date
2024-12-31
Estimated Expiration
2034-05-21

AI Technical Summary

Technical Problem

Existing transmission electron microscope sample clamping devices use tweezers to clamp the sample, which cannot accurately control the clamping force, which may cause damage or drop of the sample.

Method used

A sample clamping device including a support table, a placement block, a support frame and an active adsorption tube is designed. The adsorption and transport of samples are performed through an active adsorption tube and an auxiliary adsorption tube, and the position and clamping force of the adsorption tube are adjusted by using the control component. , ensure the stability and safety of the sample.

Benefits of technology

It effectively avoids the risk of sample drop and damage during the delivery process, and realizes the convenient delivery of samples to the sample rod, improving the accuracy and reliability of the test.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a sample clamping device of a transmission electron microscope, which comprises a support table, a placing block and a support frame which are arranged on the end face of the top end of the support table and are used for placing a sample and a sample rod, and a conveying mechanism which is arranged on the support table and is used for clamping and conveying the sample, the conveying mechanism comprises an active adsorption pipe which is arranged above the supporting table and is vertically arranged, and two auxiliary adsorption pipes which are arranged in the vertical direction and are bilaterally symmetrical about the active adsorption pipe; the adjusting assembly is arranged on the active adsorption pipe and controls the two auxiliary adsorption pipes to rotate in the direction close to each other or away from each other around the axis direction of the active adsorption pipe, and the control assembly is arranged on the supporting table and controls the active adsorption pipe and the two auxiliary adsorption pipes to synchronously move on the end face of the top end of the supporting table. The active adsorption pipe and the two auxiliary adsorption pipes are connected with an adsorption device; according to the sample conveying device, a sample can be conveniently conveyed to the sample rod, and the situation that in the prior art, the sample falls off and even is damaged due to the fact that the sample is clamped through tweezers is avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of transmission electron microscope equipment, in particular to a sample clamping device for a transmission electron microscope. Background Art

[0002] When researchers use a transmission electron microscope to conduct observation experiments, they usually directly use tweezers to clamp the sample and place it on the sample rod for fixing. However, in the prior art, the sample is clamped by tweezers. The clamping force cannot be accurately controlled when clamping the sample by tweezers, which may cause damage to the sample itself and affect the test and observation results. The existing defects are:

[0003] Most existing sample loading devices use tweezers to clamp and place samples, and the clamping force cannot be controlled. If the clamping force is too strong, the sample may be damaged, and if the clamping force is insufficient, the sample may fall off the tweezers. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a sample clamping device for a transmission electron microscope, which can conveniently transport samples to a sample rod, thereby avoiding the situation in the prior art where samples are clamped by tweezers, resulting in the sample falling or even being damaged.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sample clamping device for a transmission electron microscope, comprising a support table, a placement block and a support frame arranged on the top end surface of the support table for placing samples and sample rods, and a conveying mechanism arranged on the support table for clamping and conveying the samples, the conveying mechanism comprising an active adsorption tube arranged above the support table and arranged vertically, two auxiliary adsorption tubes arranged in the vertical direction and symmetrical about the active adsorption tube, an adjustment component arranged on the active adsorption tube and controlling the two auxiliary adsorption tubes to rotate towards or away from each other around the axis direction of the active adsorption tube, and a control component arranged on the support table and controlling the active adsorption tube and the two auxiliary adsorption tubes to move synchronously on the top end surface of the support table, the active adsorption tube and the two auxiliary adsorption tubes are both connected to the adsorption device.

[0006] Preferably, the control component includes a transverse movable screw arranged in a transverse movable groove opened in the transverse direction on the end face of the top end of the support platform, a transverse movable block sleeved on the rod body of the transverse movable screw through a threaded connection, a vertical rod vertically arranged on the transverse movable block in the vertical direction and having a vertical movable groove opened in the length direction of the rod body, a vertical movable screw passed through the vertical movable groove and having the vertical movable block threadedly connected to the rod body, a longitudinal rod transversely arranged above the top end of the support platform and fixedly connected to the vertical movable block at one end, a longitudinal movable screw arranged in a longitudinal movable groove opened in the length direction on the side surface of the bottom side of the longitudinal rod, and a longitudinal movable block sleeved on the rod body of the longitudinal movable screw through a threaded connection and the bottom end of which is connected to the top of the active adsorption tube and two auxiliary adsorption tubes through a connecting piece.

[0007] Preferably, the connecting member includes a connecting tube arranged in the vertical direction and the top end fixedly arranged on the bottom end face of the longitudinal moving block, a fixed block fixedly arranged on the bottom end face of the connecting tube through a telescopic tube, and a buffer spring movably sleeved on the connecting tube and the telescopic tube rod and with both ends fixedly connected to the longitudinal moving block and the top end face of the fixed block respectively. The top end of the active adsorption tube is vertically fixed and passes through the bottom end of the fixed block in an adjustment groove opened in the fixed block, and the top ends of the two auxiliary adsorption tubes pass through the rotating hole opened at the bottom end of the fixed block in the adjustment groove.

[0008] Preferably, an illumination lamp and an identification camera are provided on the bottom end surface of the fixing block.

[0009] Preferably, the adjustment component includes two rotating rods which are inserted into the adjustment groove and have adjacent ends which are respectively rotatably sleeved on the tube body of the active adsorption tube and the other ends which are respectively rotatably sleeved on the tube bodies of two different auxiliary adsorption tubes, an adjusting screw which is transversely arranged in the adjustment groove and located between the two auxiliary adsorption tubes, an adjusting block which is sleeved on the tube body of the adjusting screw through a threaded connection, and two linkage rods which are respectively located on both sides of the adjusting block and each of which has its two ends respectively rotatably connected to one end of the adjusting block and the side surface of the tube body of one of the auxiliary adsorption tubes.

[0010] Preferably, the bottom ends of the active adsorption tube and the two auxiliary adsorption tubes are all covered with protective covers.

[0011] The beneficial effects of the utility model are as follows: the sample is directly placed on the placement block, and then the active adsorption tube and the two auxiliary adsorption tubes are driven by the control component to move to the placement block for placing the sample, and the bottom ends of the active adsorption tube and the two auxiliary adsorption tubes are driven by the control component to move to the sample surface, and then the adsorption device adsorbs the sample surface through the bottom ends of the active adsorption tube and the two auxiliary adsorption tubes, so as to facilitate fixing the position between the sample and the active adsorption tube and the two auxiliary adsorption tubes, and then the control component is used to drive the sample to move to the support frame for placing the sample rod, and the sample is placed on the sample rod, which can conveniently transport the sample to the sample rod, avoiding the situation in the prior art where the sample is clamped by tweezers and causes the sample to fall or even be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 The present invention is a schematic diagram of the simplified structure of a sample clamping device for a transmission electron microscope.

[0014] Figure 2 It is a bottom view structural diagram of the control assembly of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the regulating component of the utility model.

[0016] In the figure: 1. support table; 2. transverse moving groove; 3. transverse moving screw; 4. vertical rod; 5. vertical moving groove; 6. vertical moving screw; 7. vertical moving block; 8. longitudinal rod; 9. longitudinal moving groove; 10. longitudinal moving screw; 11. connecting pipe; 12. buffer spring; 13. telescopic tube; 14. fixed block; 15. active adsorption tube; 16. auxiliary adsorption tube; 17. lighting lamp; 18. protective cover; 19. adjustment groove; 20. adjustment screw; 21. adjustment block; 22. linkage rod; 23. rotating rod; 24. support frame; 25. placement block. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0018] See also Figure 1-3A sample clamping device for a transmission electron microscope comprises a support table 1, a placement block 25 and a support frame 24 arranged on the top end surface of the support table 1 for placing samples and sample rods, and a conveying mechanism arranged on the support table 1 for clamping and conveying the sample, the conveying mechanism comprises an active adsorption tube 15 arranged above the support table 1 and arranged vertically, two auxiliary adsorption tubes 16 arranged in the vertical direction and symmetrical about the active adsorption tube 15, an adjusting component arranged on the active adsorption tube 15 and controlling the two auxiliary adsorption tubes 16 to rotate in a direction close to or away from each other around the axis direction of the active adsorption tube 15, and a control component arranged on the support table 1 and controlling the active adsorption tube 15 and the two auxiliary adsorption tubes 16 to move synchronously on the top end surface of the support table 1, and the active adsorption tube 15 and the two auxiliary adsorption tubes 16 are both connected to the adsorption device.

[0019] like Figure 1-3 As shown, the sample is directly placed on the placement block 25, and then the control component arranged on the support platform 1 drives the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 to move to the sample surface and fit the sample surface, and then the adsorption device adsorbs the sample through the active adsorption tube 15 and the two auxiliary adsorption tubes 16, so as to facilitate fixing the sample on the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16, and then the control component arranged on the support platform 1 drives the sample to move to the sample rod placed on the support frame 24, so as to facilitate placing the sample on the sample rod, avoiding the step of clamping the sample and moving it to the sample rod by tweezers in the prior art, and also avoiding the situation that the sample is damaged when the staff clamps the sample with too much force by tweezers or the sample falls off due to too small clamping force, and the sample can be conveniently transported to the sample rod, avoiding the situation that the sample falls off or even is damaged when the staff clamps the sample with tweezers in the prior art.

[0020] The two auxiliary adsorption tubes 16 can be controlled to rotate around the axis of the active adsorption tube 15 toward or away from each other through the adjustment component, so as to facilitate the adjustment of the position between the active adsorption tube 15 and the bottom ends of the two auxiliary adsorption tubes 16, so as to facilitate the adsorption of samples of different sizes by adjusting the two auxiliary adsorption tubes 16 to rotate, so that the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 can be adsorbed on the sample surface, thereby ensuring the stability of the sample during transportation and avoiding the sample from falling during transportation.

[0021] like Figure 1As shown, the control assembly includes a transverse moving screw rod 3 arranged in a transverse moving groove 2 opened in the transverse direction on the top end surface of the support platform 1, a transverse moving block sleeved on the rod body of the transverse moving screw rod 3 through a threaded connection, a vertical rod 4 vertically arranged on the transverse moving block in the vertical direction and having a vertical moving groove 5 opened in the length direction on the rod body, a vertical moving screw rod 6 inserted in the vertical moving groove 5 and having a vertical moving block 7 threadedly connected to the rod body, a longitudinal rod 8 arranged transversely above the top end of the support platform 1 and fixedly connected to the vertical moving block 7 at one end, and a longitudinal moving groove 5 opened in the length direction on the bottom side of the longitudinal rod 8. The longitudinal moving screw 10 in the groove 9, and the longitudinal moving block which is threadedly sleeved on the rod body of the longitudinal moving screw 10 and the bottom end of which is connected to the top of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 through a connecting piece, wherein the transverse moving screw 3, the vertical moving screw 6 and the longitudinal moving screw 10 are all driven by a motor, and the transverse moving screw 3, the vertical moving screw 6 and the longitudinal moving screw 10 are rotated, so as to facilitate the active adsorption tube 15 and the two auxiliary adsorption tubes 16 to move up and down, left and right, front and back above the support platform 1, so as to facilitate the clamping and transportation of the sample.

[0022] The adsorption device may be an air pump.

[0023] like Figure 1-3 As shown, the connecting member includes a connecting tube 11 arranged in the vertical direction and having its top end fixedly arranged on the bottom end surface of the longitudinal moving block, a fixed block 14 fixedly arranged on the bottom end surface of the connecting tube 11 through a telescopic tube 13, and a buffer spring 12 movably sleeved on the connecting tube 11 and the rod body of the telescopic tube 13 and having its two ends fixedly connected to the longitudinal moving block and the top end surface of the fixed block 14 respectively, the top end of the active adsorption tube 15 is vertically fixedly passed through the bottom end of the fixed block 14 in an adjustment groove 19 opened in the fixed block 14, and the top ends of the two auxiliary adsorption tubes 16 are both passed through the rotation holes opened at the bottom end of the fixed block 14 In the adjustment groove 19, when the vertical moving screw 6 is rotated to drive the vertical moving block to drive the longitudinal rod 8 to move downward, the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 are in contact with the sample surface for adsorption. When the longitudinal rod 8 is driven to move downward for too long, the sample resists the force of the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16, thereby facilitating the upward movement of the fixed block 14 and compressing the buffer spring 12, thereby avoiding the active adsorption tube 15 and the two auxiliary adsorption tubes 16 from moving too far downward and causing damage to the sample.

[0024] like Figure 2 As shown, an illumination lamp 17 and an identification camera are provided on the bottom end surface of the fixing block 14, wherein the identification camera is provided to facilitate identification of the position of the sample on the placement block 25 and subsequent movement of the sample to the sample rod.

[0025] like Figure 3As shown, the adjustment component includes two rotating rods 23 which are inserted into the adjustment groove 19 and have adjacent ends which are respectively rotatably sleeved on the tube body of the active adsorption tube 15 and the other ends which are respectively rotatably sleeved on the tube bodies of two different auxiliary adsorption tubes 16, an adjustment screw 20 which is transversely arranged in the adjustment groove 19 and located between the two auxiliary adsorption tubes 16, an adjustment block 21 which is sleeved on the rod body of the adjustment screw 20 through a threaded connection, and two linkage rods 22 which are respectively located on both sides of the adjustment block 21 and each end of each linkage rod is respectively rotatably connected to one end of the adjustment block 21 and the side surface of the tube body of one of the auxiliary adsorption tubes 16, wherein the adjustment screw 20 is arranged in the fixed block 14 through the adjustment screw 20 which is arranged in the fixed block 14. Driven by a motor, the adjusting screw 20 is rotated to drive the adjusting block 21 which is threadedly sleeved on the rod body of the adjusting screw 20 to move on the rod body of the adjusting screw 20, so that the two auxiliary adsorption tubes 16 are pulled by the linkage rod 22 to rotate around the axis direction of the active adsorption tube 15 through the rotating rod 23, so as to adjust the position of the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16, so as to control the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 to be adsorbed on the sample surface when different samples are transported and placed, thereby ensuring the stability of the subsequent sample transportation.

[0026] The bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 are covered with protective sleeves 18, wherein the protective sleeves 18 can be made of rubber material to prevent the bottom ends of the active adsorption tube 15 and the two auxiliary adsorption tubes 16 from damaging the sample surface when they come into contact with the sample surface.

[0027] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sample clamping device for a transmission electron microscope, comprising a support table (1), a placement block (25) and a support frame (24) arranged on the top end surface of the support table (1) for placing a sample and a sample rod, and a conveying mechanism arranged on the support table (1) for clamping and conveying the sample, characterized in that: The conveying mechanism comprises an active adsorption tube (15) arranged above a support platform (1) and arranged vertically, two auxiliary adsorption tubes (16) arranged in a vertical direction and symmetrical with respect to the active adsorption tube (15), an adjusting component arranged on the active adsorption tube (15) and controlling the two auxiliary adsorption tubes (16) to rotate around the axis direction of the active adsorption tube (15) in a direction approaching or moving away from each other, and a control component arranged on the support platform (1) and controlling the active adsorption tube (15) and the two auxiliary adsorption tubes (16) to move synchronously on the top end surface of the support platform (1), and the active adsorption tube (15) and the two auxiliary adsorption tubes (16) are both connected to the adsorption device.

2. A sample holding device for a transmission electron microscope according to claim 1, characterized in that: The control component comprises a transverse moving screw rod (3) arranged in a transverse moving groove (2) provided in the transverse direction on the end surface of the top end of the support platform (1), a transverse moving block sleeved on the rod body of the transverse moving screw rod (3) through a threaded connection, a vertical rod (4) arranged vertically on the transverse moving block in the vertical direction and provided with a vertical moving groove (5) in the length direction on the rod body, a vertical moving screw rod (6) inserted in the vertical moving groove (5) and provided with a vertical moving block (7) threadedly connected on the rod body, a longitudinal rod (8) arranged transversely above the top end of the support platform (1) and fixedly connected to the vertical moving block (7) at one end, a longitudinal moving screw rod (10) arranged in a longitudinal moving groove (9) provided in the length direction on the bottom side of the longitudinal rod (8), and a longitudinal moving block sleeved on the rod body of the longitudinal moving screw rod (10) through a threaded connection and the bottom end of which is connected to the top ends of the active adsorption tube (15) and two auxiliary adsorption tubes (16) through a connecting piece.

3. A sample holding device for a transmission electron microscope according to claim 2, characterized in that: The connecting member comprises a connecting tube (11) arranged in a vertical direction and having its top end fixedly arranged on the bottom end surface of a longitudinal moving block, a fixed block (14) fixedly arranged on the bottom end surface of the connecting tube (11) via a telescopic tube (13), and a buffer spring (12) movably sleeved on the connecting tube (11) and the telescopic tube (13) and having its two ends respectively fixedly connected to the top end surfaces of the longitudinal moving block and the fixed block (14); the top end of an active adsorption tube (15) is vertically fixedly passed through the bottom end of the fixed block (14) and is arranged in an adjustment groove (19) provided in the fixed block (14); and the top ends of two auxiliary adsorption tubes (16) are both passed through a rotation hole provided in the bottom end of the fixed block (14) and are arranged in the adjustment groove (19).

4. The sample holding device for a transmission electron microscope according to claim 3, characterized in that: An illuminating lamp (17) and an identification camera are arranged on the bottom end surface of the fixing block (14).

5. The sample holding device for a transmission electron microscope according to claim 4, characterized in that: The adjustment component comprises two rotating rods (23) which are inserted into the adjustment groove (19) and have adjacent ends which are respectively rotatably sleeved on the tube body of the active adsorption tube (15) and the other ends which are respectively rotatably sleeved on the tube bodies of two different auxiliary adsorption tubes (16), an adjustment screw rod (20) which is transversely arranged in the adjustment groove (19) and located between the two auxiliary adsorption tubes (16), an adjustment block (21) which is sleeved on the rod body of the adjustment screw rod (20) through a threaded connection, and two linkage rods (22) which are respectively located on both sides of the adjustment block (21) and have both ends of each rod rotatably connected to one end of the adjustment block (21) and the side surface of the tube body of one of the auxiliary adsorption tubes (16).

6. A sample holding device for a transmission electron microscope according to any one of claims 1 to 5, characterized in that: The bottom ends of the active adsorption tube (15) and the two auxiliary adsorption tubes (16) are both covered with protective sleeves (18).