Biomass spectrometry imaging sampling device

Abstract

The invention relates to the technical field of biomass spectrometry, and discloses a biomass spectrometry imaging sampling device which comprises a working table, supporting frames are arranged on the periphery of the upper portion of the working table, every two of the four supporting frames are symmetrical, a top plate is arranged above the four supporting frames, and a hydraulic cylinder is arranged at the bottom of the top plate; a rear circular containing disc and a front circular containing disc are arranged at the bottom of the hydraulic cylinder. According to the invention, the hydraulic cylinder at the bottom of the top plate can be flexibly lifted and adjusted and is matched with the synchronous linkage of the rear circular placing disc, the front circular placing disc and the circular mounting column, so that the accurate displacement of the imaging assembly is realized; the circular placing cylinder is matched with the circular moving rod in an inserting manner, and the friction reduction design of the circumferential balls is combined, so that the movement is smooth, the initial position distance is stable, and the detection deviation is avoided; and meanwhile, a rectangular notch in the bottom of a rectangular fixed block is matched with a rectangular rotating block, the effect of a rotating rod and a placement plate is matched, it is ensured that the imaging assembly always faces the surface of the sample, and the consistency of the detection distance can be ensured during multi-point detection.

Description

Technical Field

[0001] This invention belongs to the field of biomass spectrometry technology, specifically, it relates to a biomass spectrometry imaging sampling device. Background Technology

[0002] As a key means of analyzing the composition of biological samples, the core requirement of biomass spectrometry imaging technology is to achieve accurate detection of the sample surface through sampling devices in order to ensure the accuracy, repeatability and spatial resolution of spectral data. In the actual detection process, the relative position control between the imaging component and the sample surface, the smoothness of movement and the consistency of distance when detecting multiple points directly affect the final imaging quality and the reliability of the analysis results.

[0003] When performing multi-point, large-scale detection on samples, the imaging components struggle to maintain optimal orientation with the sample surface and lack effective positioning constraint structures, resulting in poor spacing consistency between different detection points and an inability to form a uniform and accurate spatial distribution spectrum, thus limiting the application of the technology in the analysis of complex biological samples.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A biomass spectrometry imaging sampling device includes a worktable with four support frames arranged symmetrically around its perimeter. A top plate is positioned above the four support frames, and a hydraulic cylinder is located at the bottom of the top plate. A rear circular placement plate and a front circular placement plate are symmetrically positioned at the bottom of each hydraulic cylinder. A circular mounting column is located on one opposite side wall of each of the rear and front circular placement plates. A circular placement cylinder is located at the bottom of each circular mounting column, and a circular moving rod is inserted into the inner cavity of the circular placement cylinder. A rectangular fixing block is located at the bottom of the circular moving rod, and a rectangular slot is formed at the bottom of the rectangular fixing block. A rectangular rotating block is located within the rectangular slot, and an imaging component is located at the bottom of the rectangular rotating block. A rotating rod movably passes through the imaging component and the rectangular fixing block, and placement plates are located at both ends of the rotating rod, with two placement plates symmetrically positioned between them.

[0007] In a preferred embodiment of the present invention, the hydraulic cylinder is provided with a front L-shaped mounting plate and a rear L-shaped mounting plate at the end away from the top plate, and a concave mounting plate is provided at the end of the rear L-shaped mounting plate away from the front L-shaped mounting plate, and a fixing plate is provided at the bottom of the concave mounting plate.

[0008] In a preferred embodiment of the present invention, a servo motor is provided in the inner cavity of the concave mounting plate, a rotating rod is provided at the output end of the servo motor, and the end of the rotating rod away from the servo motor is provided on the rear circular placement plate.

[0009] In a preferred embodiment of the present invention, a guide rail is provided on one side wall opposite to the front L-shaped mounting plate and the fixing plate. The two guide rails are symmetrical to each other. An L-shaped sliding plate is slidably provided on each of the two guide rails. The two L-shaped sliding plates are symmetrical to each other. A semi-circular mounting plate is provided on one side wall opposite to the two L-shaped sliding plates. A semi-circular track is slidably provided on the semi-circular mounting plate. Mounting bearings are slidably provided on the two semi-circular tracks.

[0010] In a preferred embodiment of the present invention, each of the two L-shaped sliding plates is provided with a mounting bearing on one of its opposite sidewalls, the two mounting bearings are symmetrical to each other, each of the two mounting bearings is provided with a rotating shaft, the two rotating shafts are symmetrical to each other, and a placement plate is provided on one of the opposite sidewalls of the two rotating shafts, the two placement plates are symmetrical to each other.

[0011] In a preferred embodiment of the present invention, torsion springs are provided on both of the two rotating shafts, the two torsion springs are symmetrical to each other, and the two ends of the two torsion springs are respectively provided on the side wall opposite to the mounting bearing and the placement plate.

[0012] In a preferred embodiment of the present invention, a circular placement cylinder is provided at the bottom of the circular mounting column, and two opposite sliding grooves are provided in the inner cavity of the circular placement cylinder. The two sliding grooves are symmetrical to each other, and a sliding slider is provided on each of the two sliding grooves. The two sliding sliders are symmetrical to each other, and a circular moving disk is provided on one side wall opposite to the two sliding sliders.

[0013] In a preferred embodiment of the present invention, a return spring is provided above each of the circular moving disks, and the end of the return spring away from the circular moving disk is provided on the circular placement cylinder, and a circular moving rod is provided at the bottom of the circular moving disk.

[0014] In a preferred embodiment of the present invention, a circumferential ball bearing is provided at the end of the circular moving rod away from the circular moving disk.

[0015] In a preferred embodiment of the present invention, each of the two irregularly shaped mounting rods is slidably provided with a sliding rod, one end of each sliding rod is respectively provided on a circumferential ball bearing, and both ends of the two irregularly shaped mounting rods are respectively provided with C-shaped connecting rods, and the other ends of the C-shaped connecting rods are respectively provided on the front L-shaped mounting plate and the rear L-shaped mounting plate.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] In this invention, the hydraulic cylinder at the bottom of the top plate can be flexibly raised and lowered, and in conjunction with the synchronous linkage of the rear circular placement plate, the front circular placement plate, and the circular mounting column, the precise displacement of the imaging component is achieved. The insertion and cooperation between the circular placement cylinder and the circular moving rod, combined with the circumferential ball bearing friction reduction design, ensures smooth movement and stable initial position distance, avoiding detection deviation. At the same time, the rectangular slot at the bottom of the rectangular fixing block is adapted to the rectangular rotating block, and together with the action of the rotating rod and the placement plate, ensures that the imaging component always faces the sample surface, ensuring the consistency of the detection distance during multi-point detection.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 A three-dimensional structural schematic diagram of a biological mass spectrometry imaging sampling device;

[0021] Figure 2 A schematic diagram of the structure of a biological mass spectrometry imaging sampling device from below;

[0022] Figure 3 A side view schematic diagram of a biological mass spectrometry imaging sampling device;

[0023] Figure 4 This is a partial structural schematic diagram of a biological mass spectrometry imaging sampling device;

[0024] Figure 5 A partial side view schematic diagram of a biological mass spectrometry imaging sampling device;

[0025] Figure 6 A schematic diagram of a partial cross-sectional structure of a biological mass spectrometry imaging sampling device;

[0026] Figure 7 A biomass spectrometry imaging sampling device Figure 6 Enlarged structural diagram at point A in the middle;

[0027] Figure 8 A biomass spectrometry imaging sampling device Figure 6 Enlarged structural diagram at point B.

[0028] In the picture:

[0029] 1. Workbench; 11. Support frame; 111. Top plate; 12. Hydraulic cylinder; 121. Front L-shaped mounting plate; 122. Rear L-shaped mounting plate; 123. Concave mounting plate; 124. Fixing plate;

[0030] 2. Servo motor; 21. Rotary rod; 211. Rear circular placement plate; 212. Circular mounting post; 213. Front circular placement plate; 22. Circular placement cylinder; 221. Moving slide; 222. Moving slider; 223. Circular moving plate; 224. Return spring; 225. Circular moving rod; 226. Circular ball bearing; 228. Irregularly shaped mounting rod;

[0031] 3. Rectangular fixing block; 31. Rectangular slot; 311. Rectangular rotating block; 312. Imaging component; 32. Placement plate; 321. Rotating rod; 33. L-shaped sliding plate; 331. Mounting bearing; 332. Rotating shaft; 333. Torsion spring; 334. Guide rail; 35. Semicircular mounting plate; 351. Semicircular track; 36. C-shaped connecting rod; 361. Sliding rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0033] Example 1:

[0034] like Figures 1 to 8As shown, a biomass spectrometry imaging sampling device includes a worktable 1. Support frames 11 are arranged around the top of the worktable 1, symmetrically arranged in pairs. A top plate 111 is arranged above the four support frames 11, and a hydraulic cylinder 12 is arranged at the bottom of the top plate 111. A rear circular placement plate 211 and a front circular placement plate 213 are arranged at the bottom of the hydraulic cylinder 12, symmetrically arranged. A circular mounting column 2 is arranged on one side wall opposite to the rear circular placement plate 211 and the front circular placement plate 213. 12. A circular placement cylinder 22 is provided at the bottom of the circular mounting column 212. A circular moving rod 225 is inserted into the inner cavity of the circular placement cylinder 22. A rectangular fixing block 3 is provided at the bottom of the circular moving rod 225. A rectangular slot 31 is opened at the bottom of the rectangular fixing block 3. A rectangular rotating block 311 is provided in the inner cavity of the rectangular slot 31. An imaging component 312 is provided at the bottom of the rectangular rotating block 311. A rotating rod 321 is movably passed through the imaging component 312 and the rectangular fixing block 3. Placement plates 32 are provided at both ends of the rotating rod 321. The two placement plates 32 are symmetrical to each other. The hydraulic cylinder 12 at the bottom of the top plate 111 can be flexibly raised and lowered, and in conjunction with the synchronous linkage of the rear circular placement plate 211, the front circular placement plate 213 and the circular mounting column 212, the imaging component 312 can be precisely displaced. The insertion and cooperation between the circular placement cylinder 22 and the circular moving rod 225, combined with the circumferential ball bearing friction reduction design, ensures smooth movement and stable initial position distance, avoiding detection deviation. At the same time, the rectangular slot 31 at the bottom of the rectangular fixing block 3 is adapted to the rectangular rotating block 311, and in conjunction with the action of the rotating rod 321 and the placement plate 32, ensures that the imaging component 312 always faces the sample surface, ensuring the consistency of the detection distance during multi-point detection.

[0035] like Figures 1 to 6 As shown, in a specific embodiment, the end of the hydraulic cylinder 12 away from the top plate 111 is provided with a front L-shaped mounting plate 121 and a rear L-shaped mounting plate 122. The end of the rear L-shaped mounting plate 122 away from the front L-shaped mounting plate 121 is provided with a concave mounting plate 123, and a fixing plate 124 is provided at the bottom of the concave mounting plate 123. In this configuration, it is ensured that by controlling the operation of the hydraulic cylinder 12, the output end of the hydraulic cylinder 12 drives the front L-shaped mounting plate 121 and the rear L-shaped mounting plate 122 to move downward synchronously, thereby driving the concave mounting plate 123 connected to the rear L-shaped mounting plate 122 and the fixing plate 124 cooperating with the front L-shaped mounting plate 121 and the concave mounting plate 123 to move downward together.

[0036] like Figures 1 to 6As shown, a servo motor 2 is further provided inside the concave mounting plate 123, and a rotating rod 21 is provided at the output end of the servo motor 2. The end of the rotating rod 21 away from the servo motor 2 is provided on the rear circular placement plate 211. In this configuration, the installation position of the servo motor 2 is determined to ensure that when the operator controls the servo motor 2 installed inside the concave mounting plate 123, the output end of the servo motor 2 drives the rotating rod 21 to rotate. The end of the rotating rod 21 away from the servo motor 2 is fixedly connected to the rear circular placement plate 211. Therefore, when the rotating rod 21 rotates, it will drive the rear circular placement plate 211, the circular mounting post 212, and the front circular placement plate 213 to rotate synchronously.

[0037] like Figures 1 to 6 As shown, furthermore, guide rails 334 are provided on the opposite sidewalls of the front L-shaped mounting plate 121 and the fixed plate 124. The two guide rails 334 are symmetrical to each other, and L-shaped sliding plates 33 are slidably mounted on each of the two guide rails 334. The two L-shaped sliding plates 33 are symmetrical to each other, and semi-circular mounting plates 35 are provided on the opposite sidewalls of the two L-shaped sliding plates 33. Semi-circular tracks 351 are slidably mounted on the semi-circular mounting plates 35, and mounting bearings 331 are slidably mounted on the two semi-circular tracks 351. In this configuration, the installation positions of the semi-circular mounting plates 35 and the semi-circular tracks 351 are determined.

[0038] like Figures 1 to 6 and Figure 8 As shown, furthermore, each of the two L-shaped sliding plates 33 has a mounting bearing 331 on one of its opposite sidewalls. The two mounting bearings 331 are symmetrical to each other. Each of the two mounting bearings 331 has a rotating shaft 332 on it. The two rotating shafts 332 are symmetrical to each other. Each of the two rotating shafts 332 has a torsion spring 333 on it. The two torsion springs 333 are symmetrical to each other. The two ends of the two torsion springs 333 are respectively located on the opposite sidewalls of the mounting bearings 331 and the placement plates 32. In this configuration, an L-shaped sliding plate 33 is slidably connected to a guide rail 334 on the opposite side wall of the front L-shaped mounting plate 121 and the fixing plate 124. A rotating shaft 332 is installed inside the mounting bearing 331 on the L-shaped sliding plate 33. The placement plate 32 connected to the rotating shaft 332 is movably connected to the rectangular fixing block 3 and the rectangular rotating block 311 through a rotating rod 321. The two ends of the torsion spring 333 mounted on the rotating shaft 332 are fixed to the mounting bearing 331 and the placement plate 32, respectively. Under the combined action of the elastic restoring effect of the torsion spring 333 and the weight of the placement plate 32, the placement plate 32 always remains in a vertically downward state. Then, the rotating rod 321 drives the rectangular rotating block 311 to rotate in the rectangular slot 31, ensuring that the imaging component 312 always faces the sample surface during the entire rotation process.

[0039] Example 2:

[0040] The difference between Embodiment 1 and this embodiment is that: Figures 1 to 7 As shown, a biomass spectrometry imaging sampling device includes a circular mounting column 212 with a circular placement cylinder 22 at its bottom. Two opposing sliding grooves 221 are provided inside the circular placement cylinder 22, symmetrically arranged. Each sliding groove 221 has a sliding slider 222, also symmetrically arranged. A circular moving disk 223 is provided on each opposite side wall of the sliding sliders 222. In this design, the positions of the sliding grooves 221 and the sliding sliders 222 are determined to ensure that the circular moving disk 223 can move vertically.

[0041] like Figures 1 to 7 As shown in the specific embodiment, a return spring 224 is provided above each circular moving disk 223. The end of the return spring 224 away from the circular moving disk 223 is provided on the circular placement cylinder 22, and a circular moving rod 225 is provided at the bottom of the circular moving disk 223. In this configuration, it is ensured that when the circular mounting column 212 rotates, the circular placement cylinder 22 at its bottom rotates accordingly, thereby driving the circular moving rod 225 to rotate in the horizontal direction. At this time, under the elastic force of the return spring 224, the circular moving disk 223 is always positioned vertically along the moving slide groove 221 by the moving slider 222, ensuring that the circular moving rod 225 can maintain a stable distance from the sample while rotating, avoiding changes in the detection distance due to rotation, and ensuring the consistency of detection at different points.

[0042] like Figures 1 to 7 As shown, furthermore, a circumferential ball bearing 226 is provided at the end of the circular moving rod 225 away from the circular moving disk 223. In this configuration, the installation position of the circumferential ball bearing 226 is determined.

[0043] Example 3:

[0044] The difference between Embodiment 2 and this embodiment is that: Figures 1 to 7 As shown, a biomass spectrometry imaging sampling device includes two irregularly shaped mounting rods 228, each with a sliding rod 361 slidably mounted on it. One end of each sliding rod 361 is mounted on a circumferential ball bearing 226. C-shaped connecting rods 36 are mounted at both ends of the two irregularly shaped mounting rods 228, with the other ends of the C-shaped connecting rods 36 respectively mounted on a front L-shaped mounting plate 121 and a rear L-shaped mounting plate 122. In this configuration, the mounting positions of the irregularly shaped mounting rods 228 and the C-shaped connecting rods 36 are determined.

[0045] The implementation principle of the biomass spectrometry imaging sampling device of the present invention is as follows:

[0046] First, the staff placed the biomass spectrometry sample on the workbench 1. After the sample was placed, the staff controlled the hydraulic cylinder 12 to operate. The output end of the hydraulic cylinder 12 drove the front L-shaped mounting plate 121 and the rear L-shaped mounting plate 122 to move downwards synchronously. This, in turn, caused the concave mounting plate 123 connected to the rear L-shaped mounting plate 122 and the fixing plate 124 that cooperated with the front L-shaped mounting plate 121 and the concave mounting plate 123 to move downwards together.

[0047] During this process, the downward movement of the concave mounting plate 123 and the fixing plate 124 will synchronously drive the rear circular placement plate 211, the circular mounting post 212, and the front circular placement plate 213 to move downward. When the circular mounting post 212 moves downward, it will drive the circular placement cylinder 22 connected to the bottom to move downward as well. A sliding block 222 is slidably disposed in the sliding groove 221 opened on both sides of the inner cavity of the circular placement cylinder 22. The sliding block 222 is fixedly connected to the circular moving plate 223. One end of the return spring 224 connected above the circular moving plate 223 is fixed to the inner wall of the circular placement cylinder 22. Under the downward force of the circular placement cylinder 22, the circular moving plate 223 moves downward. The sliding slider 222 moves vertically along the sliding groove 221, thereby pushing the circular moving rod 225 at the bottom to move vertically downward. The circumferential ball bearings 226 on the circular moving rod 225 can reduce the friction between it and the inner wall of the circular placement cylinder 22. At the same time, the circular moving rod 225 and the circumferential ball bearings 226 can slide with the assistance of the irregular mounting rod 228 and the sliding rod 361. Therefore, the circumferential ball bearings 226 can move with the assistance of the irregular mounting rod 228, thereby ensuring that when the imaging component 312 rotates, its distance from the imaging component 312 in the vertical direction to the workpiece is always equal, thus ensuring the accuracy of the detection.

[0048] When the circular moving rod 225 moves down, it drives the rectangular fixed block 3 at the bottom to move down synchronously. A rectangular rotating block 311 is set in the rectangular slot 31 at the bottom of the rectangular fixed block 3. The imaging component 312 installed at the bottom of the rectangular rotating block 311 moves down together with the rectangular fixed block 3 until the imaging component 312 reaches the detection position of the biomass spectrometry sample, and completes the preliminary detection of a certain point of the sample.

[0049] When the single-point test of the sample is completed, and other points need to be tested, the staff controls the servo motor 2 installed in the inner cavity of the concave mounting plate 123 to run. The output end of the servo motor 2 drives the rotating rod 21 to rotate. The end of the rotating rod 21 away from the servo motor 2 is fixedly connected to the rear circular placement plate 211. Therefore, when the rotating rod 21 rotates, it will drive the rear circular placement plate 211, the circular mounting column 212 and the front circular placement plate 213 to rotate synchronously.

[0050] During the rotation of the circular mounting column 212, the circular placement cylinder 22 at its bottom rotates accordingly, which in turn drives the circular moving rod 225 to rotate in the horizontal direction. At this time, under the elastic force of the return spring 224, the circular moving disk 223 maintains its vertical positioning along the moving slide groove 221 through the moving slider 222, ensuring that the circular moving rod 225 can maintain a stable distance from the sample while rotating, avoiding changes in the detection distance due to rotation, and ensuring the consistency of detection at different points.

[0051] Meanwhile, an L-shaped sliding plate 33 is slidably connected to a guide rail 334 on the opposite side wall of the front L-shaped mounting plate 121 and the fixing plate 124. A rotating shaft 332 is installed inside the mounting bearing 331 on the L-shaped sliding plate 33. The placement plate 32 connected to the rotating shaft 332 is movably connected to the rectangular fixing block 3 and the rectangular rotating block 311 through the rotating rod 321. The two ends of the torsion spring 333 mounted on the rotating shaft 332 are fixed to the mounting bearing 331 and the placement plate 32 respectively. Under the combined action of the elastic reset of the torsion spring 333 and the weight of the placement plate 32 itself, the placement plate 32 always remains in a vertically downward state. Then, the rotating rod 321 drives the rectangular rotating block 311 to rotate in the rectangular slot 31, ensuring that the imaging component 312 always faces the sample surface during the entire rotation process.

[0052] During this process, the imaging component 312 can rotate around the sample in a circular direction through the continuous drive of the servo motor 2. With the lifting and lowering adjustment of the hydraulic cylinder 12, it can achieve comprehensive and accurate detection of multiple points of the biomass spectrometry sample. Throughout the process, the components are cleverly coordinated to ensure the stability of the detection process and realize the flexible switching of detection points, effectively improving the efficiency and accuracy of biomass spectrometry imaging sampling.

Claims

1. A biological mass spectrometry imaging sampling device, comprising a worktable (1), characterized in that: The workbench (1) is provided with support frames (11) on all four sides above it. The four support frames (11) are symmetrical to each other. A top plate (111) is provided above the four support frames (111). A hydraulic cylinder (12) is provided at the bottom of the top plate (111). The bottom of the hydraulic cylinder (12) is provided with a rear circular placement plate (211) and a front circular placement plate (213). The rear circular placement plate (211) and the front circular placement plate (213) are symmetrical to each other. A circular mounting post (212) is provided on one side wall opposite to the rear circular placement plate (211) and the front circular placement plate (213). A circular placement cylinder (22) is provided at the bottom of the circular mounting post (212). A circular moving rod (225) is inserted into the inner cavity of the circular placement cylinder (22). The circular moving rod (225) has a rectangular fixing block (3) at its bottom. The rectangular fixing block (3) has a rectangular slot (31) at its bottom. The rectangular slot (31) has a rectangular rotating block (311) inside its cavity. The rectangular rotating block (311) has an imaging component (312) at its bottom. A rotating rod (321) is movably connected through the imaging component (312) and the rectangular fixing block (3). The rotating rod (321) has a placement plate (32) at both ends. The two placement plates (32) are symmetrical to each other.

2. The biological mass spectrometry imaging sampling device according to claim 1, characterized in that, The hydraulic cylinder (12) is provided with a front L-shaped mounting plate (121) and a rear L-shaped mounting plate (122) at one end away from the top plate (111). The rear L-shaped mounting plate (122) is provided with a concave mounting plate (123) at one end away from the front L-shaped mounting plate (121). A fixing plate (124) is provided at the bottom of the concave mounting plate (123).

3. The biological mass spectrometry imaging sampling device according to claim 2, characterized in that, The concave mounting plate (123) is equipped with a servo motor (2), and the output end of the servo motor (2) is equipped with a rotating rod (21). The end of the rotating rod (21) away from the servo motor (2) is set on the rear circular placement plate (211).

4. The biological mass spectrometry imaging sampling device according to claim 2, characterized in that, The front L-shaped mounting plate (121) and the fixed plate (124) are provided with guide rails (334) on opposite side walls. The two guide rails (334) are symmetrical to each other. L-shaped sliding plates (33) are slidably arranged on both guide rails (334). The two L-shaped sliding plates (33) are symmetrical to each other. Semicircular mounting plates (35) are provided on opposite side walls of the two L-shaped sliding plates (33). Semicircular tracks (351) are slidably arranged on the semicircular mounting plates (35). Mounting bearings (331) are slidably arranged on the two semicircular tracks (351).

5. A biological mass spectrometry imaging sampling device according to claim 4, characterized in that, The two mounting bearings (331) are symmetrical to each other, and each of the two mounting bearings (331) is provided with a rotating shaft (332). The two rotating shafts (332) are symmetrical to each other, and a placement plate (32) is provided on one side wall opposite to the two rotating shafts (332). The two placement plates (32) are symmetrical to each other.

6. A biological mass spectrometry imaging sampling device according to claim 5, characterized in that, Both of the two rotating shafts (332) are provided with torsion springs (333), the two torsion springs (333) are symmetrical to each other, and the two ends of the two torsion springs (333) are respectively provided on the side wall opposite to the mounting bearing (331) and the placement plate (32).

7. A biological mass spectrometry imaging sampling device according to claim 1, characterized in that, The bottom of the circular mounting column (212) is provided with a circular placement cylinder (22). The inner cavity of the circular placement cylinder (22) is provided with two opposite sliding grooves (221). The two sliding grooves (221) are symmetrical to each other. The two sliding grooves (221) are provided with sliding blocks (222). The two sliding blocks (222) are symmetrical to each other. The opposite side wall of the two sliding blocks (222) is provided with a circular moving disk (223).

8. A biological mass spectrometry imaging sampling device according to claim 7, characterized in that, Each of the circular moving disks (223) is provided with a return spring (224) above it. The end of the return spring (224) away from the circular moving disk (223) is provided on the circular placement cylinder (22). A circular moving rod (225) is provided at the bottom of the circular moving disk (223).

9. A biological mass spectrometry imaging sampling device according to claim 8, characterized in that, The end of the circular moving rod (225) away from the circular moving disk (223) is provided with a circumferential ball bearing (226).

10. A biological mass spectrometry imaging sampling device according to claim 1, characterized in that, Each of the two irregular mounting rods (228) is slidably provided with a sliding rod (361). The opposite ends of the two sliding rods (361) are respectively provided on the circumferential ball bearings (226). C-shaped connecting rods (36) are respectively provided at both ends of the two irregular mounting rods (228), and the other ends of the C-shaped connecting rods (36) are respectively provided on the front L-shaped mounting plate (121) and the rear L-shaped mounting plate (122).

Images