A sample rod capable of loading multiple samples

Abstract

This invention relates to the field of transmission electron microscope accessories, and in particular to a sample rod capable of loading multiple samples. The sample rod includes a rod body and a rod core, with the rod core passing through the rod body. A rod head is located at the front end of the rod core, and the rod head has multiple sample mesh mounting positions arranged along the axial direction of the sample rod. A first limiting portion is located on the side of the rod core. A limiting member is located between the rod body and the rod core, with a portion of the limiting member protruding from the rod body. Multiple second limiting portions are located inside the limiting member. The limiting member can rotate around the axial direction of the sample rod, allowing the first limiting portion to engage with different second limiting portions. Under the constraint of different second limiting portions, the rod core can move along the axial direction of the sample rod to different positions. The number of second limiting portions corresponds to the number of sample mesh mounting positions. By providing second limiting portions for different sample mesh mounting positions, different sample mesh mounting positions correspond to different rod core positions. When adjusting the rod core position, it can be adjusted to the correct position in one step, making the adjustment process more convenient and faster.

Description

Technical Field

[0001] This invention relates to the field of transmission electron microscope accessories, and in particular to a sample holder capable of loading multiple samples. Background Technology

[0002] A TEM (Transmission Electron Microscopy) system mainly consists of the following parts: electron gun, condenser lens, sample chamber, objective lens, intermediate lens, and projector lens. The sample chamber is located below the condenser lens and contains a sample stage for holding the sample. TEM systems often use a rod-shaped sample stage—the sample rod—with a sample mesh placed at the front end. This small size improves the resolving power of the TEM system. However, a typical sample rod can only hold one sample at a time, making it inconvenient when multiple samples need to be observed and compared.

[0003] Patent document CN109613035B discloses a sample rod that can hold multiple samples. However, when adjusting the position of the loaded samples using a horizontal moving device, it is difficult to adjust it to the correct position in one go. The adjustment process is relatively time-consuming and not convenient or fast. Summary of the Invention

[0004] To address the aforementioned problems and achieve rapid and accurate adjustment of the position of the loaded samples, this invention provides a sample rod capable of loading multiple samples.

[0005] Specifically, the technical solution of the present invention is:

[0006] A sample rod capable of loading multiple samples includes a rod body and a rod core. The rod core passes through the rod body and has a rod head at its front end. The rod head has multiple sample net mounting positions arranged along the axial direction of the sample rod. A first limiting part is provided on the side of the rod core. A limiting member is provided between the rod body and the rod core. The limiting member partially protrudes from the rod body and has multiple second limiting parts on its inner side. The limiting member can rotate around the axial direction of the sample rod to engage the first limiting part with different second limiting parts. Under the limiting of different second limiting parts, the rod core can move to different positions along the axial direction of the sample rod. The number of second limiting parts corresponds to the number of sample net mounting positions.

[0007] Preferably, the first limiting part is a first elastic protrusion along the radial direction of the sample rod, and the second limiting part is a groove matching the first elastic protrusion. The second limiting part extends along the axial direction of the sample rod, and the front ends of different second limiting parts extend forward to different positions along the axial direction of the sample rod. The first limiting part includes two first elastic protrusions in opposite directions, and the second limiting part correspondingly includes two grooves.

[0008] Preferably, the inner side of the limiting member is also provided with an annular groove connecting each of the second limiting parts. When the first limiting part is located in the annular groove, the limiting member can rotate around the sample rod axis.

[0009] Preferably, the rod body includes a rod body main body and an end cap, and the limiting member includes a limiting member main body and a knob. The limiting member main body is disposed inside the rod body main body, the second limiting part is disposed inside the limiting member main body, the end cap is disposed between the limiting member main body and the knob, and is fixed on the rod body main body to limit the limiting member main body from moving axially along the sample rod, and the knob is fixed on the limiting member main body.

[0010] Preferably, the main body of the limiting member is provided with a second elastic protrusion along the axial direction of the sample rod, and the head of the second elastic protrusion is in elastic contact with the knob; the main body of the rod is provided with a third elastic protrusion along the axial direction of the sample rod, and the head of the third elastic protrusion is in elastic contact with the main body of the limiting member.

[0011] Preferably, the rod core is provided with a guide protrusion along the radial direction of the sample rod, and a corresponding guide groove is provided on the inner side of the rod body to guide the movement of the rod core along the axial direction of the sample rod.

[0012] Preferably, the rod head includes a rod head body and a pressure cap. The sample net mounting position is a sample net mounting groove provided on the rod head body. The pressure cap is fixed to the rod head body by a fastener. An elastic pressure plate is provided on the pressure cap corresponding to the sample net mounting groove to press the sample net into the sample net mounting groove and fix the sample net.

[0013] Preferably, the rear end of the cap is rotatably connected to the rear end of the rod head body, the front end of the cap is fixed to the rod head body by a fastener, and the sample net mounting groove is located between the front end and the rear end of the rod head body.

[0014] Preferably, the surface of the rod head body facing away from the sample net mounting groove is provided with a relief groove, and the sample net mounting groove and the relief groove are connected by a relief hole. The relief groove is frustum-shaped.

[0015] Preferably, the pressure cap includes a frame, which is fixed to the rod head body by a fastener. Two elastic pressure plates are provided on the inner side of the frame corresponding to a sample mesh mounting slot. The tails of the two elastic pressure plates are fixed to the frame, and the heads are arranged opposite to each other. The heads of the elastic pressure plates are arc-shaped structures that match the sample mesh.

[0016] Beneficial technical effects of the present invention:

[0017] In use, first determine the second limiting part corresponding to the sample mesh mounting position to be observed. Then, manipulate the limiting part protruding from the rod body to rotate the limiting part around the sample rod axis, so that the first limiting part engages with the corresponding second limiting part. Under the limitation of the second limiting part, move the rod core to the corresponding position. By setting the second limiting part for different sample mesh mounting positions, different sample mesh mounting positions correspond to different rod core positions. When adjusting the rod core position, it can be adjusted to the correct position in one go, making the adjustment process more convenient and faster. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a sample rod capable of holding multiple samples.

[0019] Figure 2 Here is a structural diagram of the rod core;

[0020] Figure 3 Diagram showing the open state of the cap on the rod head;

[0021] Figure 4 This is a diagram showing the assembly relationship between the rod head, rod core, and sample mesh.

[0022] Figure 5 This is an assembly diagram of the rod head, rod core, and sample mesh;

[0023] Figure 6 Here is a structural diagram of the limiting component;

[0024] Figure 7 Exploded view of the limiting component;

[0025] Figure 8 This is a structural diagram of the first part of the main body of the limiting component;

[0026] Figure 9 This is a structural diagram of the shaft;

[0027] Figure 10 An exploded view of the shaft;

[0028] Figure 11 This is an assembly diagram showing the relationship between the core, the limiting component, and the shaft.

[0029] Figure label:

[0030] Rod core 1, rod head 11, rod head body 111, clearance groove 1111, clearance hole 1112, pressure cap 112, frame 1121, elastic pressure plate 1122, fastener 113, first limiting part 12, guide protrusion 13, sealing ring 14; sample net mounting positions b1, b2, b3, b4;

[0031] Limiting component 2, limiting component body 21 (including first part 21A and second part 21B), annular groove 211, second elastic protrusion 212, knob 22; second limiting parts a1, a2, a3, a4;

[0032] 3. Shaft body 3, shaft body 31, third elastic protrusion 311, guide groove 312, end cap 32, sealing O-ring 33, guide pin 34. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1:

[0035] like Figure 1 As shown, a sample rod capable of loading multiple samples includes a rod body 3 (e.g., Figure 9 (as shown) and rod core 1 (as shown) Figure 2 As shown), the core 1 passes through the shaft 3, and the front end of the core 1 is provided with a clubhead 11 (as shown). Figure 3 As shown), the rod head 11 is provided with multiple sample mesh mounting positions arranged along the axial direction of the sample rod, the rod core 1 has a first limiting part 12 on its side, and a limiting member 2 (such as...) is provided between the rod body 3 and the rod core 1. Figure 6 As shown, a portion of the limiting member 2 protrudes from the rod body 3, and the limiting member 2 can be manipulated to rotate around the sample rod axis through this exposed portion.

[0036] The limiting member 2 has multiple second limiting parts on its inner side. The limiting member 2 can rotate around the sample rod axis to allow the first limiting part 12 to engage with different second limiting parts. Under the limitation of different second limiting parts, the rod core 1 can move along the sample rod axis to different positions. The number of second limiting parts corresponds to the number of sample net mounting positions. In this embodiment, there are four sample net mounting positions, namely b1, b2, b3, and b4, and the corresponding number of second limiting parts is four, namely a1, a2, a3, and a4. In some embodiments, the number of sample net mounting positions and second limiting parts can also be two, three, or more than five.

[0037] The second limiting part is used to restrict the forward movement of the rod core 1 along the sample rod axis. Different second limiting parts restrict the rod core 1 to different positions, so that the sample net mounting position at the target position is different. Different sample net mounting positions can reach the same position (target position) by switching the second limiting part connected to the first limiting part 12. When the number of sample net mounting positions is N (N is greater than 1), the number of second limiting parts is also N. Different second limiting parts aX (X = 1, 2, ..., N) correspond to different fixed points PX on the sample rod axis. When the rod core 1 moves along the sample rod axis, the distance LX between the sample net mounting position bX and the fixed point PX changes continuously, L1 = L2 = ... = LN.

[0038] In use, first determine the second limiting part corresponding to the sample mesh mounting position to be observed. Then, manipulate the limiting member 2, which protrudes from the rod body, to rotate it around the sample rod axis, causing the first limiting part 12 to engage with the corresponding second limiting part. Under the limitation of the second limiting part, move the rod core to the corresponding position. By setting second limiting parts for different sample mesh mounting positions, different sample mesh mounting positions correspond to different rod core positions. When adjusting the rod core position, it can be adjusted to the correct position in one go, making the adjustment process more convenient and faster.

[0039] In this embodiment, the limiting member 2 cannot move along the sample rod axial direction, but can only rotate around the sample rod axial direction under manipulation. The rod core 1 can move along the sample rod axial direction under manipulation. When the first limiting part 12 is not engaged with the second limiting part, the rod core 1 can still rotate around the sample rod axial direction. When the first limiting part 12 is engaged with a second limiting part, the second limiting part temporarily restricts the rod core 1 from rotating around the sample rod axial direction. In some embodiments, the limiting member 2 may not be fixed inside the rod body 3. To allow different second limiting parts aX (corresponding to different fixed points PX on the sample rod axis) to move forward along the sample rod axial direction, the rod body 3 can be used to restrict the limiting member 2 from moving forward.

[0040] In this embodiment, the first limiting part 12 is a first elastic protrusion along the radial direction of the sample rod, and the second limiting part is a groove matching the first elastic protrusion. The second limiting part extends along the axial direction of the sample rod, and the front ends of different second limiting parts extend forward to different positions along the axial direction of the sample rod. The first limiting part 12 includes two first elastic protrusions in opposite directions, and the second limiting part correspondingly includes two grooves, so that the rod core 1 can move stably along the axial direction of the sample rod without wobbling left and right. The distribution of the second limiting parts within the limiting member 2 is as follows: Figure 8 As shown, after the limiting member 2 rotates 180° around the sample rod axis, the distribution of the second limiting part within the limiting member 2 is also as shown. Figure 8 As shown. In some embodiments, the first limiting portion 12 can be a groove, and the second limiting portion can be a protrusion.

[0041] In some embodiments, the first limiting part 12 is a first elastic protrusion along the radial direction of the sample rod, the inner side of the limiting member 2 is provided with a spiral groove, and the second limiting part is a dot-shaped groove provided at the bottom of the spiral groove. The dot-shaped groove positions the movement of the first limiting part 12 within the spiral groove, temporarily restricting the movement of the rod core 1. When rotating the limiting member 2 to switch the second limiting part, it is not necessary to pull the rod core 1 backward along the axial direction of the sample rod, which is convenient to use. In some embodiments, the limiting member 2 may be provided with multiple through holes connected to the spiral groove, and multiple dot-shaped grooves may be formed at the bottom of the spiral groove.

[0042] In this embodiment, the first limiting part 12 is a ball bearing rod provided on the rod core 1, and the limiting member 2 is provided with a through hole connected to the second limiting part. The movement of the first limiting part 12 within the second limiting part is positioned through the through hole, temporarily restricting the movement of the rod core 1. In some embodiments, the through hole may not be provided, and the movement of the first limiting part 12 within the second limiting part may be positioned by the front end face of the second limiting part along the axial direction of the sample rod.

[0043] In this embodiment, the inner side of the limiting member 2 is also provided with an annular groove 211 connecting each of the second limiting parts. When the first limiting part 12 is located in the annular groove 211, the limiting member 2 can rotate around the sample rod axis. In some embodiments, the annular groove 211 may not be provided. When it is necessary to rotate the limiting member 2, the rod core 1 is pulled out backward along the sample rod axis, so that the first limiting part 12 is separated from the limiting member 2.

[0044] In this embodiment, the second limiting part a1 is provided on the annular groove 211 for ease of manufacturing. In some embodiments, the position of the annular groove 211 can also be moved forward / backward along the sample rod axis.

[0045] In this embodiment, the shaft 3 includes a shaft body 31 and an end cap 32 (e.g., ...). Figure 10 As shown), the limiting member 2 includes a limiting member body 21 and a knob 22 (as shown). Figure 7 As shown), Figure 11 As shown, the limiting component body 21 is located inside the rod body body 31, the second limiting part is located inside the limiting component body 21, the end cap 32 is located between the limiting component body 21 and the knob 22, and is fixed on the rod body body 31 to limit the movement of the limiting component body 21 along the sample rod axis, and the knob 22 is fixed on the limiting component body 21.

[0046] In this embodiment, when the first limiting part 12 is located within the second limiting parts a2, a3, and a4, it is positioned by the through holes on the second limiting parts a2, a3, and a4; when the first limiting part 12 is located within the second limiting part a1, it is positioned by the end cap 32, the second limiting part a1, and the annular groove 211. In some embodiments, a through hole for positioning the first limiting part 12 may also be provided on the second limiting part a1.

[0047] In this embodiment, the circumferential surface of the knob 22 is provided with anti-slip texture to facilitate the rotation of the limiting member 2.

[0048] In this embodiment, the limiting member body 21 includes a first part 21A and a second part 21B. The second limiting part and the annular groove 211 are provided on the first part 21A, and the second part 21B is fixed on the first part 21A by screws (not shown), which facilitates manufacturing.

[0049] In this embodiment, the limiting member body 21 is provided with a second elastic protrusion 212 along the axial direction of the sample rod, and the head of the second elastic protrusion 212 elastically contacts the knob 22; the rod body 31 is provided with a third elastic protrusion 311 along the axial direction of the sample rod, and the head of the third elastic protrusion 311 elastically contacts the limiting member body 21, so that the limiting member 2 can rotate smoothly and stably relative to the rod body 3. In some embodiments, the second elastic protrusion 212 and the third elastic protrusion 311 may not be provided.

[0050] In this embodiment, both the second elastic protrusion 212 and the third elastic protrusion 311 are ball-head plungers.

[0051] In this embodiment, the rod core 1 is provided with a guide protrusion 13 along the radial direction of the sample rod (e.g., Figure 2 As shown), the inner side of the rod body 3 is provided with a corresponding guide groove 312 (as shown). Figure 10 As shown, the guide protrusion 13 and guide groove 312 are used to guide the movement of the rod core 1 along the sample rod axis, so that the rod core 1 moves stably along the sample rod axis. In some embodiments, the guide protrusion 13 and guide groove 312 may not be provided, and the movement of the rod core 1 along the sample rod axis may be guided by the second limiting part and the first limiting part 12.

[0052] In this embodiment, as Figure 3 As shown, the rod head 11 includes a rod head body 111 and a cap 112, and the sample net mounting position is a sample net mounting groove provided on the rod head body 111 (e.g., Figure 4 As shown), the pressure cap 112 is fixed to the rod head body 111 by the fastener 113. An elastic pressure plate 1122 is provided on the pressure cap 112 corresponding to the sample mesh mounting groove, used to press the sample mesh 4 into the sample mesh mounting groove and fix the sample mesh 4 (as shown). Figure 5 As shown in the diagram, this prevents sample mesh 4 from drifting. By properly setting the depth and size of the sample mesh mounting groove, and by properly setting the sample mesh 4, the center of the sample mesh 4 can be located on the axis of the sample rod, making it convenient to use.

[0053] In this embodiment, the rear end of the pressure cap 112 is rotatably connected to the rear end of the rod head body 111, and the front end of the pressure cap 112 is fixed to the rod head body 111 by the fastener 113. The sample net mounting groove is located between the front end and the rear end of the rod head body 111 to facilitate the loading of the sample net 4.

[0054] In this embodiment, the surface of the rod head body 111 facing away from the sample net mounting groove is provided with a relief groove 1111. The sample net mounting groove and the relief groove 1111 are connected through a relief hole 1112. The relief groove 1111 is frustoconical, which supports the sample net 4 while avoiding obstructing the view as much as possible.

[0055] In this embodiment, the pressure cap 112 includes a frame 1121, which is fixed to the rod head body 111 by a fastener 113. The inner side of the frame 1121 is provided with two elastic pressure plates 1122 corresponding to a sample mesh mounting slot. The tails of the two elastic pressure plates 1122 are fixed to the frame 1121, and the heads are arranged opposite each other. The head of the elastic pressure plate 1122 is an arc-shaped structure that matches the sample mesh, so as to press down the sample mesh 4 while avoiding obstructing the view as much as possible.

[0056] In this embodiment, the fastener 113 is a screw.

[0057] In this embodiment, two sealing rings 14 are provided between the rod core 1 and the rod body 3. The rod body 3 is provided with sealing O-rings 33 and guide pins 34. The sealing rings 14 and sealing O-rings 33 are used to isolate the vacuum, and the guide pins 34 are used to guide the movement of the sample rod.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. It should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention after reading this specification should be included within the scope of protection of the present invention.

Claims

1. A sample rod capable of loading multiple samples, comprising a rod body and a rod core, the rod core passing through the rod body, and a rod head provided at a front end of the rod core, characterized in that: The rod head is provided with multiple sample mesh mounting positions arranged along the axial direction of the sample rod. The side of the rod core is provided with a first limiting part. A limiting member is provided between the rod body and the rod core. The limiting member is partially exposed from the rod body. The inner side of the limiting member is provided with multiple second limiting parts. The first limiting part is two first elastic protrusions in opposite directions along the radial direction of the sample rod. The second limiting part is two grooves that match the first elastic protrusions. The second limiting parts extend along the axial direction of the sample rod. The front ends of different second limiting parts extend forward to different positions along the axial direction of the sample rod. The limiting member can rotate around the axial direction of the sample rod so that the first elastic protrusions of the first limiting part engage with the grooves of different second limiting parts. When the limiting member is rotated, the rod core can move to different positions along the axial direction of the sample rod under the limitation of different second limiting parts. The number of second limiting parts corresponds to the number of sample mesh mounting positions.

2. The sample holder capable of loading multiple samples as described in claim 1, characterized in that: The inner side of the limiting member is also provided with an annular groove connecting each of the second limiting parts. When the first limiting part is located in the annular groove, the limiting member can rotate around the sample rod axis.

3. The sample rod capable of loading multiple samples as described in claim 2, characterized in that: The rod body includes a rod body main body and an end cap. The limiting component includes a limiting component main body and a knob. The limiting component main body is located inside the rod body main body. The second limiting part is located inside the limiting component main body. The end cap is located between the limiting component main body and the knob and is fixed on the rod body main body to limit the movement of the limiting component main body along the sample rod axial direction. The knob is fixed on the limiting component main body.

4. The sample holder capable of loading multiple samples as described in claim 3, characterized in that: The limiting component body is provided with a second elastic protrusion along the axial direction of the sample rod, and the head of the second elastic protrusion is in elastic contact with the knob; the rod body body is provided with a third elastic protrusion along the axial direction of the sample rod, and the head of the third elastic protrusion is in elastic contact with the limiting component body.

5. The sample holder capable of loading multiple samples as described in claim 1, characterized in that: The rod core is provided with a guide protrusion along the radial direction of the sample rod, and a corresponding guide groove is provided on the inner side of the rod body to guide the movement of the rod core along the axial direction of the sample rod.

6. The sample holder capable of loading multiple samples as described in claim 1, characterized in that: The rod head includes a rod head body and a pressure cap. The sample net mounting position is a sample net mounting groove provided on the rod head body. The pressure cap is fixed to the rod head body by a fastener. An elastic pressure plate is provided on the pressure cap corresponding to the sample net mounting groove, which is used to press the sample net into the sample net mounting groove and fix the sample net.

7. The sample holder capable of loading multiple samples as described in claim 6, characterized in that: The rear end of the cap is rotatably connected to the rear end of the rod head body, and the front end of the cap is fixed to the rod head body by a fastener. The sample net mounting groove is located between the front end and the rear end of the rod head body.

8. The sample holder capable of loading multiple samples as described in claim 6, characterized in that: The surface of the rod head body facing away from the sample net mounting groove is provided with a relief groove. The sample net mounting groove and the relief groove are connected by a relief hole. The relief groove is frustum-shaped.

9. The sample holder capable of loading multiple samples as described in claim 6, characterized in that: The pressure cap includes a frame, which is fixed to the rod head body by a fastener. Inside the frame, there are two elastic pressure plates corresponding to a sample mesh mounting slot. The tails of the two elastic pressure plates are fixed to the frame, and the heads are arranged opposite each other. The heads of the elastic pressure plates are arc-shaped structures that match the sample mesh.

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