Test fixture

Abstract

The utility model provides a kind of sample clamp, sample clamp includes: clamping mechanism, including mounting seat and clamping piece, mounting seat has the fixed end and clamping end of interval arrangement, clamping piece is movably arranged between fixed end and clamping end;Clamping mechanism has the clamping state and the unlocking state of relative arrangement, when clamping mechanism is in clamping state, clamping piece is close to clamping end, and mutually cooperate to clamp sample with clamping end;Drive part, including elastic element, elastic element is arranged between clamping piece and mounting seat, when clamping mechanism is in clamping state, elastic element is driven connection with clamping piece, to apply pre-tightening force to sample. Through the technical scheme provided by the utility model, the problem that sample is pasted on sample stage using conductive glue when doing EBSD experiment in prior art, sample is prone to slip due to gravity, which affects analysis result.

Description

Technical Field

[0001] This utility model relates to the field of scanning electron microscope testing instruments, and more specifically, to a sample clamp. Background Technology

[0002] Electron backscatter diffraction (EBSD) is a core technique in modern materials microscopic analysis. It uses scanning electron microscopy to acquire and analyze Kikuchi diffraction patterns on the sample surface, thereby precisely characterizing the crystallographic information of the material. Its main applications include: accurately determining grain orientation, distribution, and size to reveal the material's texture; phase identification to distinguish different phases with similar chemical compositions; analyzing grain boundary types, dislocation densities, and strain distribution to assess the material's deformation mechanisms and recrystallization processes; and it can also be used to study phase transformations and fracture behavior. EBSD provides indispensable quantitative data for understanding the relationship between the microstructure and properties of materials and is widely used in research on metallic materials and other fields.

[0003] However, when using EBSD for phase identification, if the sample is adhered to the stage using traditional conductive adhesive, the small size of the phase necessitates magnification to 1000x or even 5000x or higher to acquire information about the phase region. Because there is a significant angle between the sample acquisition surface and the lens, the sample is essentially on a slope, and gravity causes it to slide slightly and continuously. This slight, continuous sliding becomes more pronounced with increasing magnification, resulting in a significant discrepancy between the actual area scanned by the electron beam and the area captured by the photograph. This makes it impossible to effectively acquire the Kikuchi flower pattern on the phase, interfering with the phase analysis results. Utility Model Content

[0004] This invention provides a sample holder to solve the problem in the prior art where, when performing EBSD experiments, the sample is attached to the sample stage with conductive adhesive, and the sample tends to slip due to gravity, which affects the analysis results.

[0005] This utility model provides a sample clamp for holding samples for EBSD testing. The sample clamp includes: a clamping mechanism, including a mounting base and a clamping member. The mounting base has a fixed end and a clamping end spaced apart, and the clamping member is movably disposed between the fixed end and the clamping end. The clamping mechanism has a clamping state and an unlocked state arranged opposite to each other. When the clamping mechanism is in the clamping state, the clamping member approaches the clamping end and cooperates with the clamping end to clamp the sample. A driving part includes an elastic member disposed between the clamping member and the mounting base. When the clamping mechanism is in the clamping state, the elastic member is driven to connect with the clamping member to apply a preload force to the sample.

[0006] Furthermore, the drive unit also includes a drive member, which is driven to connect with the clamping member. The drive member drives the clamping member to move closer to or away from the clamping end, so that the clamping mechanism switches between the clamping state and the unlocking state.

[0007] Furthermore, the driving component includes a pull rod, the extension direction of which is the same as the movement direction of the clamping component. The pull rod extends from the outside of the mounting base to a fixed end, and the end of the pull rod located inside the mounting base is connected to the clamping component to drive the clamping component to move closer to or away from the clamping end. The end of the pull rod located inside the mounting base has a threaded section, and the clamping component has a threaded hole. The threaded hole and the threaded section are correspondingly arranged. When the clamping mechanism is in the unlocked state, at least a portion of the threaded section is located in the threaded hole and is threadedly connected to the threaded hole.

[0008] Furthermore, the mounting base includes a base plate, a first side plate, and a second side plate. The first side plate and the second side plate are spaced apart at both ends of the base plate. The extending directions of the first side plate and the second side plate form an angle with the extending direction of the base plate. The clamping member is movably disposed between the first side plate and the second side plate. The first side plate forms a clamping end, and the second side plate forms a fixing end.

[0009] Furthermore, the elastic element is disposed between the clamping element and the fixed end.

[0010] Furthermore, the elastic element includes multiple pre-tension springs, which are spaced apart between the clamping member and the fixed end. One end of the pre-tension spring abuts against the side of the clamping member near the clamping end, and the other end of the pre-tension spring abuts against the fixed end.

[0011] Furthermore, the clamping mechanism also includes a fixing part, on which a mounting base is disposed, and the fixing part is used for fixed connection with the processing table.

[0012] Furthermore, the first side plate and the second side plate are respectively disposed on the top surface of the base plate, and the fixing part is disposed on the bottom surface of the base plate. The end of the fixing part near the base plate is threadedly connected to the base plate, and the end of the fixing part away from the base plate is used for fixed connection with the processing table.

[0013] Furthermore, the mounting base is provided with a first splicing structure and a second splicing structure, which are respectively arranged at both ends of the mounting base along the width direction of the base plate, and the first splicing structure and the second splicing structure are compatible with each other.

[0014] Furthermore, the base plate is provided with dovetail protrusions and dovetail grooves at both ends along its width direction. The dovetail protrusions and dovetail grooves are adapted to each other, forming a first splicing structure and a second splicing structure.

[0015] By applying the technical solution of this utility model, the clamping design of the clamping member and the clamping end can ensure that the sample can be firmly fixed in the clamping state. Compared with the existing technology that uses conductive adhesive for fixing, the conductive adhesive is prone to deformation due to the weight of the sample, which can lead to slippage and affect the experimental analysis results. This application improves the stability of sample fixing by mechanically fixing the sample through the clamping mechanism, and greatly reduces the slippage of the sample due to gravity. Thus, when performing EBSD tests under high magnification, the deviation between the actual area scanned by the electron beam and the area captured by the photograph can be reduced, improving the accuracy and reliability of the phase analysis results. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the sample holder from a side view provided by this utility model is shown.

[0018] Figure 2 A schematic diagram of the sample holder provided by this utility model from a top view is shown.

[0019] Figure 3 This diagram shows an assembly schematic of the mounting base and elastic element from a side view perspective provided by this utility model.

[0020] Figure 4 It shows Figure 3 A structural diagram from a side view;

[0021] Figure 5 This diagram illustrates a structural schematic of multiple clamping units spliced ​​together according to an embodiment of the present invention.

[0022] Figure 6 A schematic diagram of the structure of multiple clamping units spliced ​​together according to another embodiment of the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Clamping mechanism; 11. Mounting base; 111. Fixed end; 1111. Mounting hole; 112. Clamping end; 113. Base plate; 1131. Dovetail protrusion; 1132. Dovetail groove; 12. Clamping component; 121. Threaded hole; 13. Fixing part;

[0025] 20. Drive unit; 21. Elastic element; 22. Tie rod;

[0026] 01. Sample. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] like Figures 1 to 6 As shown, this embodiment of the present invention provides a sample clamp for holding a sample 01 for EBSD testing. The sample clamp includes a clamping mechanism 10 and a driving unit 20. The clamping mechanism 10 includes a mounting base 11 and a clamping member 12. The mounting base 11 has a fixed end 111 and a clamping end 112 spaced apart. The clamping member 12 is movably disposed between the fixed end 111 and the clamping end 112. The clamping mechanism 10 has a clamping state and an unlocked state, respectively. When the clamping mechanism 10 is in the clamping state, the clamping member 12 approaches the clamping end 112 and cooperates with the clamping end 112 to clamp the sample 01. The driving unit 20 includes an elastic member 21 disposed between the clamping member 12 and the mounting base 11. When the clamping mechanism 10 is in the clamping state, both ends of the sample 01 abut against the clamping end 112 and the clamping member 12, respectively. The elastic member 21 is driven to the clamping member 12 to apply a preload force to the sample 01. When the clamping mechanism 10 is in the unlocked state, the clamping end 112 and the clamping member 12 do not clamp the sample 01.

[0029] The movement of the clamping member 12 can be achieved manually or by mechanical means.

[0030] By applying the technical solution of this utility model, the clamping design of the clamping member 12 and the clamping end 112 allows the sample 01 to be firmly fixed in the clamped state. Compared with the existing technology that uses conductive adhesive for fixing, the conductive adhesive is prone to deformation due to the weight of the sample, which can lead to sample slippage and affect the experimental analysis results. This application improves the stability of the sample 01 by mechanically fixing the sample through the clamping mechanism, greatly reducing the slippage of the sample 01 caused by gravity. Thus, when performing EBSD experiments at high magnification, the deviation between the actual area scanned by the electron beam and the area captured by the photograph can be reduced, improving the accuracy and reliability of the phase analysis results. At the same time, compared with conductive adhesive or electroplated silver paste fixing, the structure adopted in this application can be reused, reducing experimental costs.

[0031] Furthermore, the drive unit 20 also includes a drive member, which is drivenly connected to the clamping member 12. The drive member drives the clamping member 12 to move closer to or further away from the clamping end 112, so that the clamping mechanism 10 switches between a clamping state and an unlocked state. In this way, the position of the clamping member can be controlled manually or automatically, realizing the rapid clamping and release of the sample 01, making the operation of the clamping mechanism more convenient and allowing for flexible switching between the two states.

[0032] like Figure 1 and Figure 2 As shown, the driving component includes a pull rod 22, the extension direction of which is the same as the movement direction of the clamping component 12. The pull rod 22 extends through a fixed end 111 from the outside of the mounting base 11. The end of the pull rod 22 located inside the mounting base 11 is connected to the clamping component 12 to drive the clamping component 12 closer to or further away from the clamping end 112. The end of the pull rod 22 located inside the mounting base 11 has a threaded section, and the clamping component 12 has a threaded hole 121. The threaded hole 121 is correspondingly arranged with the threaded section. When the clamping mechanism 10 is in the unlocked state, at least part of the threaded section is located in the threaded hole 121 and is threadedly connected to the threaded hole 121. The pull rod 22 and the clamping component 12 are reliably locked through the threaded connection, preventing the pull rod 22 from disengaging when driving the clamping component 12. At the same time, the above connection method makes the two modules independently replaceable, which facilitates the adjustment of the specifications of the clamping component 12 or the pull rod 22 according to different sample requirements. With the pull rod 22 in place, the operator can directly manipulate the pull rod 22 located outside the mounting base 11. The position of the clamping part 12 can be directly controlled by the linear movement of the pull rod 22. The operation is simple and does not require an additional conversion mechanism. This not only shortens the switching time between different states, but also improves the control accuracy.

[0033] The fixed end 111 has a mounting hole 1111 with a smooth inner wall, which is corresponding to the pull rod 22. The pull rod 22 passes through the mounting hole 1111 and is threaded into the threaded hole 121. The central axis of the mounting hole 1111 and the threaded hole 121 coincide. The mounting hole 1111 is located in the middle of the fixed end 111, and the threaded hole 121 is located in the middle of the clamping end 112.

[0034] In other embodiments, the driving element may be an electric motor, a hydraulic cylinder, or other types of actuators to meet the driving requirements in different scenarios.

[0035] like Figure 3As shown, the mounting base 11 includes a base plate 113, a first side plate, and a second side plate. The first and second side plates are spaced apart at both ends of the base plate 113, and the extending directions of the first and second side plates form an angle with the extending direction of the base plate 113. A clamping member 12 is movably disposed between the first and second side plates. The first side plate forms the clamping end 112, and the second side plate forms the fixing end 111. The above structural design provides sufficient space to accommodate the sample. The sample 01 is placed on the base plate 113, which provides support for the bottom of the sample 01. The first side plate and the clamping member 12 clamp the sides of the sample 01, ensuring the stability of the sample 01 during the testing process.

[0036] In this embodiment, the clamping member 12 is a clamping plate, and its extension direction is parallel to that of the first side plate.

[0037] In other embodiments, the clamping member 12 is a structure such as a clamping block or a gripper.

[0038] like Figure 2 As shown, the elastic element 21 is disposed between the clamping member 12 and the fixed end 111. When the clamping mechanism is in the clamping state, the elastic element 21 is compressed. When the clamping mechanism is in the unlocked state, the elastic element 21 can be in its natural length or compressed.

[0039] When it is necessary to clamp and fix the sample 01, the threaded section of the pull rod 22 is assembled and fixed with the threaded hole 121 on the clamping member 12. Then, the pull rod 22 is moved outward, thereby driving the clamping member 12 away from the clamping end 112, increasing the gap between the two so that the sample 01 can be placed into the gap. At this time, the elastic member 21 is compressed. After the sample 01 is placed, the pull rod 22 is slowly released, and the compressed elastic member 21 is released. It works with the pull rod 22 to push the clamping member 12 toward the sample 01 until the clamping member 12 abuts against one side of the sample 01 and pushes the other end of the sample 01 abuts against the clamping end 112. At this time, the clamping end 112 and the clamping member 12 work together to clamp the sample 01, and the clamping mechanism switches to the clamping state. After the test is completed, the threaded section of the pull rod 22 is assembled and fixed with the threaded hole 121 on the clamping member 12. Then the pull rod 22 is moved outward, thereby driving the clamping member 12 away from the clamping end 112, increasing the gap between the two, so as to remove the sample 01 from the gap between the two, and completing one test cycle.

[0040] After adjusting the clamping state, the pull rod 22 can also be removed from the mounting base 11 to reduce the space volume of the sample clamp and avoid interference between the pull rod 22 and the outside world during the experiment, which would affect the clamping effect of the sample clamp.

[0041] In other embodiments, the elastic element 21 may also be disposed between the clamping member 12 and the clamping end 112, and the elastic element 21 is in a stretched state when the sample 01 is clamped.

[0042] Furthermore, the elastic element 21 includes multiple pre-tension springs, which are spaced apart between the clamping element 12 and the fixed end 111. One end of each pre-tension spring abuts against the side of the clamping element 12 near the clamping end 112, and the other end abuts against the fixed end 111. This increases the contact area between the elastic element 21 and the clamping element 12, allowing the clamping force of the clamping element 12 to be applied to the sample 01 more evenly. This avoids stress concentration in the sample 01 during the fixing process due to uneven clamping force, which could lead to deformation under pressure.

[0043] like Figure 4 As shown, in this embodiment, the elastic element 21 includes four preload springs, which are respectively wound around the outer periphery of the pull rod 22.

[0044] In other embodiments, the elastic element 21 may be an elastic bellows or other elastic structure.

[0045] like Figure 1 As shown, the clamping mechanism 10 also includes a fixing part 13, on which a mounting base 11 is disposed. The fixing part 13 is used to fix the mounting base 11 to the processing table. The fixing part 13 enables the mounting base 11 to remain stationary during the inspection process, improving the overall stability of the fixture, ensuring the smooth progress of the entire inspection process, and improving the reliability and inspection efficiency of the equipment.

[0046] The first side plate and the second side plate are respectively disposed on the top surface of the base plate 113, and the fixing part 13 is disposed on the bottom surface of the base plate 113. The end of the fixing part 13 near the base plate 113 is threadedly connected to the base plate 113, and the end of the fixing part 13 away from the base plate 113 is used for fixed connection with the processing table. This makes the fixture easy to assemble and disassemble, and facilitates maintenance and replacement of parts.

[0047] Specifically, the fixing part 13 is a screw, the end of the screw near the base plate 113 is a threaded section, and the end of the screw away from the base plate 113 is a smooth rod structure.

[0048] In other embodiments, the fixing part 13 can be detachably connected to the base plate 113 via a snap-fit ​​structure or a snap-fit ​​structure.

[0049] like Figure 2 As shown, in some embodiments of this application, the mounting base 11 is provided with a first splicing structure and a second splicing structure. The first splicing structure and the second splicing structure are respectively disposed at both ends of the mounting base 11 along the width direction of the base plate 113, and the first splicing structure and the second splicing structure are adapted to each other. Through the above arrangement, the clamp can be spliced ​​and expanded according to the size or quantity of the sample 01, and multiple clamping members 12 and multiple clamping ends 112 can be spliced ​​and matched to form a continuous clamping surface, thereby improving the flexibility and practicality of the device.

[0050] The first splicing structure and the second splicing structure can be set on the base plate 113 or on the fixed end.

[0051] like Figure 5 and Figure 6 As shown, the clamping mechanism 10 and the driving part 20 cooperate to form a clamping unit. The sample fixture includes multiple clamping units. Two adjacent clamping units are spliced ​​together through a first splicing structure and a second splicing structure. A clamping space is formed between the clamping member 12 and the clamping end 112. When multiple clamping units are spliced ​​together, the clamping spaces of two adjacent clamping units are interconnected and spliced ​​together to form a continuous clamping surface. In this way, multiple samples 01 can be clamped simultaneously by splicing together, or larger sample 01 can be clamped together.

[0052] like Figures 2 to 6 As shown, the base plate 113 has dovetail protrusions 1131 and dovetail grooves 1132 at both ends along its width direction. The structural contours of the dovetail protrusions 1131 and dovetail grooves 1132 are adapted to each other. The dovetail protrusions 1131 form a first splicing structure, and the dovetail grooves 1132 form a second splicing structure. The cooperation between the dovetail protrusions 1131 and dovetail grooves 1132 not only makes the clamps easy to assemble and disassemble, but also provides a stable splicing method, avoiding loosening and misalignment during the splicing process of adjacent clamping units. Furthermore, the special shape of the dovetail structure creates a mechanical interlock between the splicing surfaces, ensuring a tight connection between multiple clamps, enhancing the strength and rigidity of the connection, thus improving the stability and reliability of the entire device.

[0053] Preferably, the dovetail protrusion 1131 and the dovetail groove 1132 are both located at the center of both ends of the base plate 113.

[0054] In other embodiments, the first splicing structure and the second splicing structure can be configured as a T-slot structure or a pin connection structure.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0057] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A specimen holder for holding a specimen (01) for EBSD testing, characterized in that The sample fixture includes: The clamping mechanism (10) includes a mounting base (11) and a clamping member (12). The mounting base (11) has a fixed end (111) and a clamping end (112) spaced apart. The clamping member (12) is movably disposed between the fixed end (111) and the clamping end (112). The clamping mechanism (10) has a clamping state and an unlocking state that are disposed opposite to each other. When the clamping mechanism (10) is in the clamping state, the clamping member (12) is close to the clamping end (112) and cooperates with the clamping end (112) to clamp the sample (01). The drive unit (20) includes an elastic element (21) disposed between the clamping member (12) and the mounting base (11). When the clamping mechanism (10) is in the clamping state, the elastic element (21) is driven to connect with the clamping member (12) to apply a preload force to the sample (01).

2. The sample fixture according to claim 1, characterized in that, The drive unit (20) also includes a drive member, which is driven to connect with the clamping member (12). The drive member drives the clamping member (12) to move closer to or away from the clamping end (112) so that the clamping mechanism (10) switches between the clamping state and the unlocking state.

3. The sample fixture according to claim 2, characterized in that, The driving component includes a pull rod (22), the extension direction of which is the same as the moving direction of the clamping member (12), the pull rod (22) passes through the fixed end (111) from the outside of the mounting base (11), and the end of the pull rod (22) located inside the mounting base (11) is connected to the clamping member (12) to drive the clamping member (12) to move closer to or away from the clamping end (112). The end of the pull rod (22) located in the mounting base (11) has a threaded section, and the clamping member (12) has a threaded hole (121). The threaded hole (121) is correspondingly arranged with the threaded section. When the clamping mechanism (10) is in the unlocked state, at least part of the threaded section is located in the threaded hole (121) and is threadedly connected to the threaded hole (121).

4. The test sample clamp of claim 1, wherein The mounting base (11) includes a base plate (113), a first side plate and a second side plate. The first side plate and the second side plate are spaced apart at both ends of the base plate (113). The extending directions of the first side plate and the second side plate form an angle with the extending direction of the base plate (113). The clamping member (12) is movably disposed between the first side plate and the second side plate. The first side plate forms the clamping end (112) and the second side plate forms the fixing end (111).

5. The test sample clamp of claim 1, wherein The elastic element (21) is disposed between the clamping element (12) and the fixed end (111).

6. The test sample clamp of claim 1, wherein The elastic element (21) includes a plurality of pre-tension springs, which are spaced apart between the clamping member (12) and the fixed end (111). One end of the pre-tension spring abuts against the side of the clamping member (12) near the clamping end (112), and the other end of the pre-tension spring abuts against the fixed end (111).

7. The sample fixture according to claim 4, characterized in that, The clamping mechanism (10) further includes a fixing part (13), and the mounting base (11) is disposed on the fixing part (13). The fixing part (13) is used to fix and connect to the processing table.

8. The sample fixture according to claim 7, characterized in that, The first side plate and the second side plate are respectively disposed on the top surface of the base plate (113), and the fixing part (13) is disposed on the bottom surface of the base plate (113). The end of the fixing part (13) near the base plate (113) is threadedly connected to the base plate (113), and the end of the fixing part (13) away from the base plate (113) is used to be fixedly connected to the processing table.

9. The test sample clamp of claim 4, wherein The mounting base (11) is provided with a first splicing structure and a second splicing structure. The first splicing structure and the second splicing structure are respectively arranged at both ends of the mounting base (11) along the width direction of the base plate (113). The first splicing structure and the second splicing structure are compatible with each other.

10. The test sample clamp of claim 9, wherein The base plate (113) is provided with dovetail protrusions (1131) and dovetail grooves (1132) at both ends along its width direction. The dovetail protrusions (1131) and the dovetail grooves (1132) are adapted to each other. The dovetail protrusions (1131) form the first splicing structure, and the dovetail grooves (1132) form the second splicing structure.

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