Sample extraction device for preparing stem cells

Abstract

The utility model relates to the technical field of sample extraction, in particular to a sample extraction device for preparing stem cells, which comprises an extraction tube, a fixing part, a mounting block, a piston rod, a connecting rod, a top plate and a piston block, the piston block is connected with the inner wall of the extraction tube in a sliding mode, and the piston rod is connected with the piston block; the fixing part is connected with the extraction pipe, and the mounting block is slidably connected with the fixing part; a groove is formed in the fixing part, a plurality of fixing teeth are arranged in the groove side by side, a limiting assembly is arranged on the mounting block, and the limiting assembly is connected with the fixing teeth in a matched mode. In the use state, the fixing teeth are matched with the limiting assembly, the mounting block can only slide on the fixing part in the direction away from the needle head, and an extracting solution is prevented from being pushed out of the extracting tube; when the sliding block is pushed, the protruding block extrudes the end, the sliding rod drives the limiting block to be away from the fixing teeth, the spring is further compressed, the installation block can slide on the fixing part at will, and the use state is flexible and convenient.

Description

Technical Field

[0001] This utility model relates to the field of sample extraction technology, specifically to a sample extraction device for preparing stem cells. Background Technology

[0002] Stem cells are a type of cell with unlimited or immortal self-renewal capacity and can produce at least one type of highly differentiated daughter cells. Stem cells are extracted using an extraction device, which is generally a liquid extractor.

[0003] Chinese Patent CN220012593U discloses a sample extraction device for preparing stem cells, relating to the technical field of sample extraction devices. The device includes a tube with a suction head at the lower end and a handle on the outer side of the upper end. Two sets of handles are provided, with a fixing mechanism at the upper end of one set. This invention solves the problem that when using a sampler to collect stem cells, the control buttons are always movable. If the operator accidentally presses the control button after extracting the stem cells, the internal stem cells are squeezed out, resulting in resource waste. This invention, through the arrangement of a button, a channel, a fixing mechanism, a column, a long channel, a cavity, a square plate, a sliding groove, a circular groove, a circular block, a sliding rod, a baffle, and a spring, achieves the goal of fixing the button by releasing one end of the sliding rod after extracting the stem cells, preventing unintentional pressing of the button and the squeezing of the internal stem cells out of the tube, thus avoiding waste.

[0004] However, the above technical solution has the following drawbacks: the sample extraction device is also equipped with a fixing mechanism at the end of the tube. The length of the fixing mechanism is determined by the distance the button and the disc move, which increases the volume of the extraction device. It cannot be operated with one hand and is inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a sample extraction device for preparing stem cells.

[0006] The technical solution of this utility model is: a sample extraction device for preparing stem cells, comprising an extraction tube, a fixing part, a mounting block, a piston rod, a connecting rod, a top plate, and a piston block;

[0007] The lower end of the extraction tube is equipped with a needle, the piston block is slidably connected to the inner wall of the extraction tube and is coaxially distributed with the extraction tube, the piston rod is connected to the piston block, and the top plate is connected to the other end of the piston rod.

[0008] The fixing part is connected to the outer surface of the extraction tube, the mounting block is slidably connected to the fixing part, and the connecting rod connects the top plate and the mounting block;

[0009] The fixing part is provided with a groove, and multiple fixing teeth are arranged side by side in the groove. The mounting block is provided with a limiting component, which is connected to the fixing teeth.

[0010] Preferably, the limiting component includes a protrusion, a limiting block, a spring, a slide bar, and a slider;

[0011] The mounting block has a blind hole, the limiting block slides through the blind hole, the limiting block engages with the fixing teeth, and the spring connects the blind hole and the end of the limiting block, and the spring is in a compressed state.

[0012] The slide rod is connected to the limiting block near the end of the spring. The spring is sleeved on the outside of the slide rod. The slide rod is slidably connected to the mounting block. One end of the slide rod passes through the mounting block, and the other end of the slide rod has an end cap.

[0013] The slider slides onto the surface of the mounting block, and the end of the slider is pressed against the surface of the slider. The protrusion connects to the surface of the slider.

[0014] Preferably, the fixed tooth has a wedge surface a at one end near the needle tip, and the limiting block has a wedge surface b at one end, with the wedge surface b pressing against the wedge surface a.

[0015] Preferably, the end of the protrusion near the end has a slope.

[0016] Preferably, one end of the needle is provided with an installation sleeve, which is threadedly connected to the end of the extraction tube;

[0017] The mounting sleeve is equipped with a sealing part, which is pressed against the inner wall of the extraction tube.

[0018] Preferably, the extraction tube is provided with an observation window, inside which is a transparent plate, and on the transparent plate is a scale.

[0019] Preferably, the surface of the mounting block is provided with anti-slip protrusions.

[0020] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0021] 1. In this utility model, the extraction tube is held by hand, and the mounting block is pressed with the thumb, so that the mounting block moves away from the needle. The mounting block drives the piston block to move in the extraction tube through the connecting rod, the top plate and the piston rod, so that the liquid can be extracted. The extraction device can be operated with one hand and is convenient to use.

[0022] 2. In the usage state of this utility model, the slider is located below the end. When the fixed teeth slide away from the needle, the wedge surface a presses the limiting block. The limiting block is pressed into the mounting block. The mounting block can slide away from the needle on the fixed part. The upper end of the fixed teeth blocks the limiting block, preventing the mounting block from sliding in the other direction and preventing the extract from being pushed out of the extraction tube. When the slider is pushed, the protrusion presses the end, and the slide rod drives the limiting block away from the fixed teeth. The spring is further compressed, allowing the mounting block to slide freely on the fixed part. The usage state is flexible and convenient.

[0023] 3. The sleeve installed on the needle in this utility model can be removed from the extraction tube, which facilitates the replacement of the needle and makes it easy to store, preventing the needle from being damaged by collision and extending the service life of the extraction device. Attached Figure Description

[0024] Figure 1 This is a perspective view of a sample extraction device for preparing stem cells proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of a sample extraction device for preparing stem cells proposed in this utility model.

[0026] Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle.

[0027] Figure 4 This is a schematic diagram of the limiting component in one embodiment of the present invention.

[0028] Reference numerals: 1. Extraction tube; 2. Fixing part; 3. Fixing tooth; 4. Mounting block; 5. End; 6. Mounting sleeve; 7. Needle; 8. Transparent plate; 9. Scale; 10. Piston rod; 11. Connecting rod; 12. Protrusion; 13. Top plate; 14. Sealing part; 15. Piston block; 16. Limiting block; 17. Spring; 18. Slide rod; 19. Slider. Detailed Implementation

[0029] Example 1

[0030] like Figures 1-4 As shown, the present invention proposes a sample extraction device for preparing stem cells, comprising an extraction tube 1, a fixing part 2, a mounting block 4, a piston rod 10, a connecting rod 11, a top plate 13, and a piston block 15;

[0031] The lower end of the extraction tube 1 is provided with a needle 7. The piston block 15 is slidably connected to the inner wall of the extraction tube 1 and is coaxially distributed with the extraction tube 1. The piston rod 10 is connected to the piston block 15, and the top plate 13 is connected to the other end of the piston rod 10.

[0032] The fixing part 2 is connected to the outer surface of the extraction tube 1, the mounting block 4 is slidably connected to the fixing part 2, and the connecting rod 11 connects the top plate 13 and the mounting block 4.

[0033] Furthermore, the extraction tube 1 is provided with an observation window, inside which is a transparent plate 8, and on the transparent plate 8 is a scale 9;

[0034] Furthermore, the surface of mounting block 4 is provided with anti-slip protrusions;

[0035] The fixing part 2 is provided with a groove, and multiple fixing teeth 3 are arranged side by side in the groove. The mounting block 4 is provided with a limiting component, which is connected to the fixing teeth 3.

[0036] In this invention, the extraction tube 1 is held by hand, and the mounting block 4 is pressed down with the thumb, causing the mounting block 4 to move away from the needle 7. The mounting block 4 drives the piston block 15 to move inside the extraction tube 1 through the connecting rod 11, the top plate 13 and the piston rod 10, thereby extracting liquid. The mounting block 4 is provided with a limiting component, which is connected to the fixing teeth 3 on the fixing part 2, so that the movement state of the mounting block 4 can be adjusted. The extraction device can be operated with one hand and is convenient to use.

[0037] Example 2

[0038] like Figures 2-4 As shown, the present invention proposes a sample extraction device for preparing stem cells. Compared with Embodiment 1, the limiting component in this embodiment includes a protrusion 12, a limiting block 16, a spring 17, a slide bar 18, and a slider 19.

[0039] Mounting block 4 is provided with a blind hole, limiting block 16 is slidably connected to the blind hole, limiting block 16 is engaged with fixing tooth 3, and spring 17 is connected to the end of the blind hole and limiting block 16, and spring 17 is in a compressed state.

[0040] The slide rod 18 is connected to the limiting block 16 at one end near the spring 17. The spring 17 is sleeved on the outside of the slide rod 18. The slide rod 18 is slidably connected to the mounting block 4. One end of the slide rod 18 passes through the mounting block 4, and the other end of the slide rod 18 is provided with an end 5.

[0041] The slider 19 slides to connect to the surface of the mounting block 4, and the end 5 is pressed against the surface of the slider 19 near the surface of the slider 18. The protrusion 12 connects to the surface of the slider 19.

[0042] Furthermore, the fixed tooth 3 has a wedge surface a near the end of the needle 7, and the end of the limiting block 16 has a wedge surface b, with the wedge surface b pressing against the wedge surface a.

[0043] Furthermore, the end of the protrusion 12 near the end has a slope.

[0044] In this embodiment, when the device is used for extraction, the slider 19 is located below the end, and the wedge surface a of the fixed tooth 3 slides away from the needle 7 to press the limiting block 16. The limiting block 16 is pressed into the mounting block 4, so that the mounting block 4 can slide away from the needle on the fixed part 2. The upper end of the fixed tooth 3 blocks the limiting block 16, so that the mounting block 4 cannot slide in the other direction. Furthermore, the piston block 15 cannot push the extractant, preventing the extractant from being pushed out of the extraction tube 1. When the slider 19 is pushed, the protrusion 12 presses the end 5, and the slide rod 18 drives the limiting block 16 away from the fixed tooth 3. The spring 17 is further compressed, so that the mounting block 4 can slide freely on the fixed part 2. The usage state is flexible and convenient.

[0045] Example 3

[0046] like Figures 1-2 As shown, the present invention proposes a sample extraction device for preparing stem cells. Compared with Embodiment 1, in this embodiment, one end of the needle 7 is provided with an installation sleeve 6, and the installation sleeve 6 is threadedly connected to the end of the extraction tube 1.

[0047] The mounting sleeve 6 is provided with a sealing part 14, which is pressed against the inner wall of the extraction tube 1.

[0048] In this embodiment, the sleeve 6 on the needle 7 can be removed from the extraction tube 1, which facilitates the replacement of the needle 7, makes it easy to store, prevents the needle 7 from being damaged by collision, and extends the service life of the extraction device.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A sample extraction device for preparing stem cells, characterized in that, It includes an extraction tube (1), a fixing part (2), a mounting block (4), a piston rod (10), a connecting rod (11), a top plate (13), and a piston block (15); The lower end of the extraction tube (1) is provided with a needle (7), the piston block (15) is slidably connected to the inner wall of the extraction tube (1) and is coaxially distributed with the extraction tube (1), the piston rod (10) is connected to the piston block (15), and the top plate (13) is connected to the other end of the piston rod (10); The fixing part (2) is connected to the outer surface of the extraction tube (1), the mounting block (4) is slidably connected to the fixing part (2), and the connecting rod (11) is connected to the top plate (13) and the mounting block (4); The fixing part (2) is provided with a groove, and multiple fixing teeth (3) are arranged side by side in the groove. The mounting block (4) is provided with a limiting component, which is connected to the fixing teeth (3).

2. The sample extraction device for preparing stem cells according to claim 1, characterized in that, The limiting assembly includes a protrusion (12), a limiting block (16), a spring (17), a slide bar (18), and a slider (19); The mounting block (4) is provided with a blind hole, the limiting block (16) is slidably connected to the blind hole, the limiting block (16) is connected to the fixing tooth (3), and the spring (17) connects the blind hole and the end of the limiting block (16). The spring (17) is in a compressed state. The slide rod (18) is connected to the limiting block (16) at one end near the spring (17). The spring (17) is sleeved on the outside of the slide rod (18). The slide rod (18) is slidably connected to the mounting block (4). One end of the slide rod (18) passes through the mounting block (4), and the other end of the slide rod (18) is provided with an end (5). The slider (19) slides to connect to the surface of the mounting block (4), and the end (5) close to the surface of the slider (18) presses against the surface of the slider (19). The protrusion (12) connects to the surface of the slider (19).

3. The sample extraction device for preparing stem cells according to claim 2, characterized in that, The fixed tooth (3) has a wedge surface a at one end near the needle (7), and the limiting block (16) has a wedge surface b at one end, with the wedge surface b pressing against the wedge surface a.

4. The sample extraction device for preparing stem cells according to claim 2, characterized in that, The protrusion (12) has a slope at one end near the end.

5. The sample extraction device for preparing stem cells according to claim 1, characterized in that, One end of the needle (7) is provided with an installation sleeve (6), which is threadedly connected to the end of the extraction tube (1); The mounting sleeve (6) is provided with a sealing part (14), which is pressed against the inner wall of the extraction tube (1).

6. The sample extraction device for preparing stem cells according to claim 1, characterized in that, An observation window is provided on the extraction tube (1), and a transparent plate (8) is provided inside the observation window. A scale (9) is provided on the transparent plate (8).

7. The sample extraction device for preparing stem cells according to claim 1, characterized in that, The surface of the mounting block (4) is provided with anti-slip protrusions.

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