Safe excrement sampling device

Abstract

The invention provides a safe excrement sampling device. The bottom of a sampling barrel is open; the throwing mechanism is detachably arranged at the bottom end of the sampling barrel, the throwing mechanism is used for being inserted into excrement to be sampled and throwing the excrement after sampling is completed, and the first sampling mechanism is used for applying negative pressure to an inner cavity of the sampling barrel so as to suck diluted excrement into the sampling barrel; the second sampling mechanism is arranged in the throwing mechanism, the second sampling mechanism is used for lifting normal excrement so that the normal excrement can be stored in the sampling barrel, the sealing mechanism is arranged on one side of the sampling barrel, and the sealing mechanism can seal the bottom end of the sampling barrel due to rotation. According to the sampling device, the first sampling mechanism adsorbs loose excrement through negative pressure, the problem of quantity control during loose excrement sampling of a traditional device is solved, the second sampling mechanism can sample normal excrement, the normal excrement is fed into the sampling barrel through a mechanical structure, and the double-mechanism design realizes scene-divided adaptation of loose excrement negative pressure adsorption and normal excrement mechanical lifting, so that the sampling device is simple in structure and convenient to use. And the problem of sample falling possibly occurring during sampling of a traditional single structure is avoided.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and more specifically, relates to a safe stool sampling device. Background Technology

[0002] In the medical diagnostic system, routine stool examination is a basic and crucial test that provides important evidence for the assessment of intestinal diseases and digestive system functions. As the first step in the examination, the performance of the stool sampling device directly affects the accuracy and reliability of the test results. Existing stool sampling devices, from their structural design to their working principle, mostly target solid, normal stool as the primary sampling target. These devices typically use spoon-shaped or shovel-shaped structures to pick up stool, relying on manual operation to complete sample collection. However, when dealing with loose, highly fluid stool, these traditional structures cannot accurately control the sample volume, easily leading to sample spillage and incomplete collection. Especially in scenarios where the amount of loose stool is small or its distribution is scattered, traditional sampling devices struggle to obtain representative samples. This results in incomplete and uneven samples during subsequent laboratory testing, failing to accurately reflect the patient's true health condition and delaying the diagnosis and treatment of diseases. Summary of the Invention

[0003] The purpose of this application is to provide a safe stool sampling device to improve the convenience and safety of stool sampling.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: A safe stool sampling device is provided, comprising a sampling tube, a discarding mechanism, a first sampling mechanism, a second sampling mechanism, and a sealing mechanism. The sampling tube has an opening at its bottom. The discarding mechanism is detachably located at the bottom of the sampling tube and communicates with the inner cavity of the sampling tube. The discarding mechanism is used to insert into the stool to be sampled and discard it after sampling. The first sampling mechanism is disposed in the sampling tube and has a negative pressure section located in the inner cavity of the sampling tube. It is used to draw loose stool into the sampling tube through the negative pressure of the negative pressure section. The second sampling mechanism is disposed within the discarding mechanism and is detachably connected to the first sampling mechanism. The second sampling mechanism is used to lift normal stool into the sampling tube. The sealing mechanism is located on one side of the sampling tube and is used to seal or unseal the bottom of the sampling tube.

[0005] In one possible implementation, the top end of the sampling cylinder is provided with a first sealing plate, and the first sampling mechanism includes a piston, a threaded rod, and a guide rod. The piston is slidably disposed inside the sampling cylinder, and the piston has a threaded hole in its middle part, serving as a negative pressure part. The threaded rod is rotatably disposed on the first sealing plate and is screwed into the threaded hole. The guide rod is disposed on the first sealing plate and is used to guide the piston so that when the threaded rod rotates, the piston can slide along the axial direction of the threaded rod.

[0006] In one possible implementation, the bottom of the sampling tube is provided with a second sealing plate, and the second sealing plate is provided with a sample inlet hole. The diameter of the sample inlet hole is smaller than the diameter of the sampling tube. The scattering mechanism includes a large-diameter section and a small-diameter section connected to each other. The inner diameter of the large-diameter section is the same as the outer diameter of the sampling tube. The large-diameter section is sleeved on the sampling tube, and the inner diameter of the small-diameter section is the same as the inner diameter of the sample inlet hole.

[0007] In one possible implementation, a connecting ring is provided between the large-diameter section and the small-diameter section. The connecting ring is bonded to the bottom of the second sealing plate, and the connecting ring can detach from the bond to the second sealing plate under the action of external force.

[0008] In one possible implementation, the ejection mechanism includes multiple ejection plates arranged in a zigzag pattern, which enclose the ejection mechanism to form the ejection mechanism.

[0009] In one possible implementation, a fixing ring is fixed to the outer wall of the sampling cylinder, and a discarding ring is slidably provided on the outer wall of the sampling cylinder. The fixing ring and the discarding ring are arranged at intervals. A discarding spring is provided between the fixing ring and the discarding ring, and a locking assembly is provided between the discarding ring and the sampling cylinder. In the initial state, the discarding spring is in a compressed state, the locking assembly is locked, and the discarding ring abuts against the top of the large-diameter section. When the locking assembly is unlocked, the discarding spring extends outward and reaches a natural state, and the discarding ring pushes the large-diameter section to slide, thereby releasing the adhesion between the connecting ring and the second sealing plate, so that the discarding mechanism discards the material under the action of gravity.

[0010] In one possible implementation, the outer diameters of the fixing ring, the ejection ring, and the large-diameter section are the same. The locking assembly includes a locking cylinder, which is sleeved on the outside of the fixing ring, the ejection ring, and the large-diameter section. A rubber sleeve is provided on the inner wall of the locking cylinder. When the rubber sleeve abuts against the ejection ring, the locking assembly locks. When the rubber sleeve slides above the ejection ring, the locking assembly unlocks.

[0011] In one possible implementation, the sampling cylinder has multiple sliding holes on its side wall, one end of the U-shaped rod is fixed to the top of the locking cylinder, and the other end of the U-shaped rod is fixed to the top of the piston.

[0012] In one possible implementation, a limiting groove is provided on the side wall of the small-diameter section. The second sampling mechanism includes a sampling rod and an auger blade disposed on the sampling rod. A limiting rod is provided near the bottom of the sampling rod, and the top end of the limiting rod is inserted into the limiting groove. A first connecting block is provided at the top end of the sampling rod, and a connecting groove is provided at the top of the first connecting block. A second connecting block is provided at the bottom end of the threaded rod, and the second connecting block is inserted into the connecting groove. The guide rod is slidably arranged, and a guide hole is provided at the top of the piston. The guide rod can be inserted into the guide hole by sliding, and the bottom end of the guide rod is spaced apart from the bottom of the guide hole. The guide rod can be pulled out of the guide hole by sliding.

[0013] In one possible implementation, a mounting plate is provided on one side of the first sealing plate, an adjusting rod is provided through the mounting plate, a cover is provided at the bottom of the adjusting rod, a limiting plate is provided at the top of the adjusting rod, and a return spring is provided between the limiting plate and the first sealing plate. When the return spring is in its natural state, the cover is located above the discarding mechanism, and the cover can be located below the sampling cylinder due to the sliding of the adjusting rod. The cover can be arranged coaxially with the sampling cylinder due to the rotation of the adjusting rod.

[0014] The beneficial effects of the safe stool sampling device provided in this application are as follows: Compared with the prior art, this application solves the volume control problem of traditional devices when sampling loose stool by using a first sampling mechanism to adsorb loose stool through negative pressure; while the second sampling mechanism is set in the disposal mechanism, which can "lift and store" normal stool. Because normal stool has a certain shape, the second sampling mechanism can deliver it into the sampling cylinder through a mechanical structure. This dual-mechanism design realizes scenario-specific adaptation of negative pressure adsorption of loose stool and mechanical lifting of normal stool, avoiding the problems of incomplete shoveling and sample drop that may occur when sampling normal stool with a traditional single structure. The disposal mechanism is inserted into the normal stool, and after sampling, the disposal mechanism can be completely disposed of, avoiding operator contact with the sample; the sealing mechanism seals the bottom of the sampling cylinder to prevent normal stool from falling due to gravity, ensuring that the sample remains stable during transportation and testing, and avoiding the risk of sample spillage after manual shoveling in traditional devices. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the safe stool sampling device provided in the embodiments of this application; Figure 2 A schematic diagram of the structure of the disposal mechanism of the safe stool sampling device provided in this application embodiment when disposal is completed; Figure 3 A schematic diagram of the structure of the safe stool sampling device provided in the embodiments of this application when sampling is completed; Figure 4 A cross-sectional view of a safe stool sampling device provided in an embodiment of this application; Figure 5 for Figure 4 Enlarged view of part A; Figure 6 for Figure 4 Enlarged view of part B; Figure 7 This is a schematic diagram of the structure of the locking cylinder provided in an embodiment of this application.

[0017] The labels for the attached figures are as follows: 1. Sampling tube; 2. Disposal mechanism; 5. Sealing mechanism; 101. First sealing plate; 102. Second sealing plate; 103. Sample inlet; 104. Fixing ring; 105. Removal ring; 106. Removal spring; 107. Locking cylinder; 108. Rubber cylinder; 109. Sliding hole; 110. U-shaped rod; 111. Mounting plate; 201. Small diameter section; 202. Large diameter section; 203. Connecting ring; 204. Removal plate; 205. Limiting groove; 301. Piston; 302. Threaded rod; 303. Guide rod; 304. Guide hole; 401. Sampling rod; 402. Screwdriver blade; 403. Limiting rod; 501. Adjusting rod; 502. Limiting plate; 503. Return spring; 504. Cover. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0020] When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] The terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc., 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 application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0023] The safe stool sampling device provided in this application will now be described.

[0024] Please refer to the following: Figures 1 to 7The full-type stool sampling device includes a sampling cylinder 1, a discarding mechanism 2, a first sampling mechanism, a second sampling mechanism, and a sealing mechanism 5. The sampling cylinder 1 has an opening at its bottom. The discarding mechanism 2 is detachably located at the bottom of the sampling cylinder 1 and communicates with the inner cavity of the sampling cylinder. The discarding mechanism 2 is used to insert into the stool to be sampled and discard it after sampling. The first sampling mechanism is located in the sampling cylinder and has a negative pressure section located in the inner cavity of the sampling cylinder 1. It is used to draw loose stool into the sampling cylinder 1 through the negative pressure of the negative pressure section. The second sampling mechanism is located inside the discarding mechanism 2 and is detachably connected to the first sampling mechanism. The second sampling mechanism is used to lift normal stool into the sampling cylinder 1. The sealing mechanism 5 is located on one side of the sampling cylinder 1 and is used to seal or unseal the bottom of the sampling cylinder 1.

[0025] The beneficial effects of the full-type stool sampling device provided in this embodiment are as follows: Compared with the prior art, the full-type stool sampling device provided in this embodiment solves the volume control problem of traditional devices when sampling loose stool by using a first sampling mechanism to absorb loose stool through negative pressure; while the second sampling mechanism is set in the disposal mechanism 2, which can "lift and store" normal stool. Because normal stool has a certain shape, the second sampling mechanism can send it into the sampling cylinder 1 through a mechanical structure. This dual-mechanism design realizes the scenario-specific adaptation of negative pressure absorption of loose stool and mechanical lifting of normal stool, avoiding the problems of incomplete shoveling and sample drop that may occur when sampling normal stool with a traditional single structure. The disposal mechanism 2 is inserted into the normal stool, and after sampling, the disposal mechanism 2 can be completely discarded to avoid the operator from contacting the sample; the sealing mechanism 5 seals the bottom of the sampling cylinder 1 to prevent normal stool from falling due to gravity, ensuring that the sample remains stable during transportation and testing, and avoiding the risk of sample spillage after manual shoveling in traditional devices.

[0026] In this embodiment, a first sealing plate 101 is provided at the top of the sampling cylinder 1. The first sampling mechanism includes a piston 301, a threaded rod 302, and a guide rod 303. The piston 301 is slidably disposed inside the sampling cylinder 1, and a threaded hole is provided in the middle of the piston 301. The threaded rod 302 is rotatably disposed on the first sealing plate 101 and is screwed into the threaded hole. The guide rod 303 is disposed on the first sealing plate 101 and is used to guide the piston 301 so that when the threaded rod 302 rotates, the piston 301 can slide along the axial direction of the threaded rod 302.

[0027] After the stool is inserted into the ejection mechanism 2, rotating the threaded rod 302 will cause the piston 301 to rise under the drive of the threaded rod 302. At this time, a negative pressure will be formed inside the sampling tube, so that the stool enters the sampling tube through the ejection mechanism 2 for retention.

[0028] In addition, the first sampling mechanism is mainly designed for negative pressure adsorption of loose stool, but the negative pressure environment generated by the sliding of its piston 301 can be used as an auxiliary during normal sampling. When the second sampling mechanism lifts normal stool into the sampling cylinder 1, the slight negative pressure formed by the upward movement of the piston 301 can "adsorb and fix" the sample, preventing normal stool from shaking or falling in the sampling cylinder 1. Combined with the sealing mechanism 5, a double fixation is formed, avoiding sample breakage or contamination caused by shaking in traditional devices.

[0029] like Figure 4 As shown, the bottom of the sampling cylinder 1 is provided with a second sealing plate 102, and the second sealing plate 102 is provided with a sample inlet hole 103. The diameter of the sample inlet hole 103 is smaller than the diameter of the sampling cylinder 1. The scattering mechanism 2 includes a large-diameter section 202 and a small-diameter section 201 connected to each other. The inner diameter of the large-diameter section 202 is the same as the outer diameter of the sampling cylinder 1. The large-diameter section 202 is sleeved on the sampling cylinder 1. The inner diameter of the small-diameter section 201 is the same as the inner diameter of the sample inlet hole 103.

[0030] The large-diameter section 202 is fitted onto the sampling cylinder 1, with its inner diameter matching the outer diameter of the sampling cylinder 1. This ensures that the ejection mechanism 2 will not loosen when inserted into normal feces, thus ensuring the stable execution of the lifting action of the second sampling mechanism. If the ejection mechanism 2 shakes, normal feces may fall off during the lifting process. This structure improves the mechanical stability during sampling through a tight fit.

[0031] In addition, the setting of the inlet hole 103 and the small diameter section 201 reduces the size of the opening at the bottom of the sampling tube 1. Since the main component of the feces is water, and water has a certain surface tension, the smaller the opening at the bottom of the sampling tube 1 is before the sealing mechanism 5 seals, the less likely the feces in the sampling tube 1 will leak out. On the one hand, this can improve the convenience of sampling, and on the other hand, it can prevent the sample from polluting the environment.

[0032] As a preferred technical solution, a connecting ring 203 is provided between the large diameter section 202 and the small diameter section 201. The connecting ring 203 is bonded to the bottom of the second sealing plate 102, and the connecting ring 203 can be detached from the second sealing plate 102 under the action of external force.

[0033] After normal stool sampling is completed, a small amount of stool residue may remain on the disposal mechanism 2. External force can be used to detach the connecting ring 203 from the second sealing plate 102, allowing for rapid removal of the entire disposal mechanism 2. Because normal stool has a relatively stable texture, residual samples are less likely to spill during disposal, making it safer and more hygienic compared to manually disassembling the shovel head in traditional devices. Furthermore, the adhesive structure can withstand the mechanical force exerted by the second sampling mechanism when lifting normal stool during sampling, ensuring that the disposal mechanism 2 will not detach prematurely. The torque generated when the auger blades 402 rotate and lift the stool will not cause the disposal mechanism 2 to shift due to loosening of the connecting ring 203.

[0034] In this embodiment, the removal mechanism 2 includes multiple removal plates 204, which are zig-shaped and enclose each other to form the removal mechanism 2. The bottom end of each removal plate 204 is designed with a blade-like structure.

[0035] The zigzag throwing plate 204 encloses the throwing mechanism 2, whose blade-like edge can penetrate deep into normal feces or even dry feces, avoiding the slippage problem caused by the smooth surface of the traditional shovel-shaped structure. When the normal feces are hard, the zigzag structure can "wedge" into the fecal block, and with the rotation of the auger blade 402 of the second sampling mechanism, the feces are lifted from the bottom of the throwing plate 204 to the sampling cylinder 1.

[0036] In practical use, stool samples are often collected by the patient or their family. Since the system is designed for a diverse population, some people may inadvertently dispose of the stool directly into the toilet or squat toilet when using the disposal mechanism 2. The disposal plate 204 is designed so that the disposal mechanism 2 can be divided into multiple small pieces after disposal, preventing the entire disposal mechanism 2 from clogging the toilet.

[0037] like Figure 4 and Figure 5 As shown, a fixing ring 104 is fixed on the outer wall of the sampling cylinder 1, and a removal ring 105 is slidably provided on the outer wall of the sampling cylinder 1. The fixing ring 104 and the removal ring 105 are arranged at intervals. A removal spring 106 is provided between the fixing ring 104 and the removal ring 105, and a locking assembly is provided between the removal ring 105 and the sampling cylinder 1. In the initial state, the removal spring 106 is in a compressed state, the locking assembly is locked, and the removal ring 105 abuts against the top of the large diameter section 202. When the locking assembly is unlocked, the removal spring 106 extends outward and returns to its natural state, and the removal ring 105 pushes the large diameter section 202 to slide, so as to release the adhesion between the connecting ring 203 and the second sealing plate 102, so that the removal mechanism 2 removes the material under the action of gravity.

[0038] After fecal sampling is completed, the locking assembly is unlocked, and the compressed disposal spring 106 pushes the disposal ring 105 down, which in turn pushes the large-diameter section 202 to slide, causing the connecting ring 203 to separate from the second sealing plate 102, and the disposal mechanism 2 to fall off automatically. This process eliminates the need for manual contact with the disposal mechanism 2, avoiding sample residue contamination of operators. After fecal sampling, a small amount of sample adheres to the surface of the disposal mechanism 2. Automatic disposal reduces sample splashing caused by human contact, while traditional devices require manual removal of the shovel head, posing a higher risk of infection.

[0039] Combination Figure 4 , Figure 5 and Figure 7As shown, the outer diameters of the fixing ring 104, the removal ring 105, and the large-diameter section 202 are the same. The locking assembly includes a locking cylinder 107, which is sleeved on the outside of the fixing ring 104, the removal ring 105, and the large-diameter section 202. A rubber cylinder 108 is provided on the inner wall of the locking ring. When the rubber cylinder 108 is pressed against the removal ring 105, the locking assembly is locked. When the rubber cylinder 108 slides above the removal ring 105, the locking assembly is unlocked.

[0040] When the rubber cylinder 108 presses against the removal ring 105, the frictional force locks the removal ring 105, ensuring that the removal mechanism 2 will not loosen due to mechanical vibration or tension during sampling. The auger blades 402 may generate radial force when rotating. If the removal mechanism 2 loosens, it will cause the fecal lifting path to deviate, affecting the sampling volume. The tight contact of the rubber cylinder 108 can eliminate gaps and ensure the relative fixation of the removal mechanism 2 and the sampling cylinder 1.

[0041] When the rubber cylinder 108 slides above the throwing ring 105, the friction disappears, and the throwing spring 106 can smoothly push the throwing ring 105, realizing the automatic disengagement of the throwing mechanism 2. The operating force is uniform, avoiding the jamming problem that may occur in traditional buckle structures.

[0042] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, multiple sliding holes 109 are provided on the side wall of the sampling cylinder 1. One end of the U-shaped rod 110 is fixed to the top of the locking cylinder 107, and the other end of the U-shaped rod 110 is fixed to the top of the piston 301.

[0043] The U-shaped rod connects the piston 301 and the locking cylinder 107. When the threaded rod 302 is rotated to move the piston 301 upward, the U-shaped rod simultaneously drives the locking cylinder 107 upward, causing the rubber cylinder 108 to disengage from the removal ring 105 and unlocking the removal mechanism 2. This linkage design allows for the removal of samples by continuing to rotate the threaded rod 302 after sampling, enabling rapid entry into the removal process and reducing operational steps.

[0044] Meanwhile, the linkage design avoids errors that may occur when multiple components operate independently, ensures the standardization of the normal sampling process, and reduces human error.

[0045] like Figure 4 and Figure 5As shown, a limiting groove 205 is provided on the side wall of the small diameter section 201. The second sampling mechanism includes a sampling rod 401 and an auger blade 402 provided on the sampling rod 401. A limiting rod 403 is provided near the bottom of the sampling rod 401. The top end of the limiting rod 403 is inserted into the limiting groove 205. A first connecting block is provided at the top of the sampling rod 401. A connecting groove is provided at the top of the first connecting block. A second connecting block is provided at the bottom of the threaded rod 302. The second connecting block is inserted into the connecting groove. The guide rod 303 is slidably arranged. A guide hole 304 is provided at the top of the piston 301. The guide rod 303 can be inserted into the guide hole 304 due to sliding. The bottom end of the guide rod 303 is spaced apart from the bottom of the guide hole 304. The guide rod 303 can be pulled out of the guide hole 304 due to sliding.

[0046] When the auger blade 402 of the second sampling mechanism rotates around the sampling rod 401, it can use the spiral thrust to transport normal feces from the bottom of the disposal mechanism 2 upwards to the sampling cylinder 1. The cooperation between the limiting rod 403 and the limiting groove 205 restricts the axial movement of the sampling rod 401, ensuring the stability of the auger blade 402 during rotation. After the normal feces are fixed by the zigzag disposal plate 204, the auger blade 402 can spiral upwards along the inner wall of the small diameter section 201, "rolling" the feces into the sampling cylinder 1. Compared with the single scooping of the traditional shovel-shaped structure, the spiral lifting can continuously transport samples, which is especially suitable for sampling a large amount of normal feces.

[0047] The threaded rod 302 and the sampling rod 401 are connected by a connecting block, and the guide rod 303 is pluggable. On the one hand, the sampling rod 401 can rotate under the drive of the threaded rod 302 to facilitate sampling. On the other hand, when the sampling is completed, the second sampling mechanism can be thrown out with the throwing mechanism 2, which facilitates the sealing mechanism to seal the bottom of the sampling tube.

[0048] In this embodiment, a reset plate is provided at the top of the guide rod 303, and an unlocking spring is provided between the reset plate and the first sealing plate 101. When the unlocking spring is in its natural state, the guide rod 303 is pulled out to the outside of the guide hole 304. The unlocking spring facilitates the release of the guide rod 303 from guiding the piston 301.

[0049] Finally, a mounting plate 111 is provided on one side of the first sealing plate 101, and an adjusting rod 501 is provided through the mounting plate 111. A cover 504 is provided at the bottom of the adjusting rod 501, and a limiting plate 502 is provided at the top of the adjusting rod 501. A return spring 503 is provided between the limiting plate 502 and the first sealing plate 101. When the return spring 503 is in its natural state, the cover 504 is located above the discarding mechanism 2, and the cover 504 can be located below the sampling tube due to the sliding of the adjusting rod 501. The cover 504 can be arranged coaxially with the sampling tube 1 due to the rotation of the adjusting rod 501.

[0050] The return spring 503 keeps the cap 504 initially positioned above the disposal mechanism 2, preventing it from being contaminated by feces during sampling. After sampling, the adjusting rod 501 is first pushed to position the cap 504 below the sampling cylinder 1. Then, the adjusting rod 501 is rotated to make the cap 504 coaxial with the sampling cylinder 1. Finally, the adjusting rod 501 is released, allowing the cap 504 to move upward under the action of the return spring 503 and seal the bottom, preventing feces from falling due to gravity. If long-distance transportation is required after sampling, the sealing of the cap 504 ensures that the sample does not leak, while the open design of traditional devices easily leads to sample exposure, affecting the accuracy of the test results.

[0051] The adjusting rod 501 can switch the state of the cover 504 by sliding and rotating. During sampling, the insertion depth of the removal mechanism 2 can be flexibly adjusted according to the position of the feces. At the same time, the position of the cover 504 does not interfere with the sampling action, thus improving the practicality of the device.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A safe stool sampling device, characterized in that, include: Sampling tube (1), with an opening at the bottom; The discarding mechanism (2) is detachably located at the bottom of the sampling tube (1) and communicates with the inner cavity of the sampling tube (1). The discarding mechanism (2) is used to insert into the feces to be sampled and discard it after sampling is completed. The first sampling mechanism is disposed in the sampling cylinder (1) and has a negative pressure section located in the inner cavity of the sampling cylinder (1); it is used to draw loose stool into the sampling cylinder (1) by means of the negative pressure of the negative pressure section. The second sampling mechanism is located inside the discarding mechanism (2) and is detachably connected to the first sampling mechanism. The second sampling mechanism is used to lift normal stool into the sampling tube (1). A sealing mechanism (5) is provided on one side of the sampling tube (1). The sealing mechanism (5) is used to seal or unseal the bottom end of the sampling tube (1).

2. The safe stool sampling device as described in claim 1, characterized in that, The top of the sampling tube (1) is provided with a first sealing plate (101), and the first sampling mechanism includes: A piston (301) is slidably disposed inside the sampling cylinder (1), and a threaded hole is provided in the middle of the piston (301); the piston is a negative pressure part; A threaded rod (302) is rotatably mounted on the first sealing plate (101), and the threaded rod (302) is screwed into the threaded hole; A guide rod (303) is provided on the first sealing plate (101). The guide rod (303) is used to guide the piston (301) so that when the threaded rod (302) rotates, the piston (301) can slide along the axial direction of the threaded rod (302).

3. The safe stool sampling device as described in claim 2, characterized in that: The bottom of the sampling tube (1) is provided with a second sealing plate (102), and the second sealing plate (102) is provided with a sample inlet (103). The diameter of the sample inlet (103) is smaller than the diameter of the sampling tube (1). The blasting mechanism (2) includes a large diameter section (202) and a small diameter section (201) connected to each other. The inner diameter of the large diameter section (202) is the same as the outer diameter of the sampling tube (1). The large diameter section (202) is sleeved on the sampling tube (1). The inner diameter of the small diameter section (201) is the same as the inner diameter of the sample inlet (103).

4. The safe stool sampling device as described in claim 3, characterized in that: A connecting ring (203) is provided between the large diameter section (202) and the small diameter section (201). The connecting ring (203) is bonded to the bottom of the second sealing plate (102), and the connecting ring (203) can detach from the bonding to the second sealing plate (102) under the action of external force.

5. The safe stool sampling device as described in claim 4, characterized in that: The ejection mechanism (2) includes multiple ejection plates (204), which are zig-shaped and are arranged to form the ejection mechanism (2).

6. The safe stool sampling device as described in claim 5, characterized in that: A fixing ring (104) is fixed on the outer wall of the sampling cylinder (1), and a removal ring (105) is slidably provided on the outer wall of the sampling cylinder (1). The fixing ring (104) and the removal ring (105) are arranged at intervals. A removal spring (106) is provided between the fixing ring (104) and the removal ring (105), and a locking assembly is provided between the removal ring (105) and the sampling cylinder (1). In the initial state, the removal spring (106) is in a compressed state, the locking assembly is locked, and the removal ring (105) abuts against the top of the large diameter section (202). When the locking assembly is unlocked, the removal spring (106) extends outward and reaches a natural state, and the removal ring (105) pushes the large diameter section (202) to slide, so as to release the adhesion between the connecting ring (203) and the second sealing plate (102), so that the removal mechanism (2) removes the material under the action of gravity.

7. The safe stool sampling device as described in claim 6, characterized in that: The outer diameters of the fixing ring (104), the throwing ring (105), and the large-diameter section (202) are the same. The locking assembly includes a locking cylinder (107), which is sleeved on the outside of the fixing ring (104), the throwing ring (105), and the large-diameter section (202). A rubber cylinder (108) is provided on the inner wall of the locking cylinder (107). When the rubber cylinder (108) abuts against the throwing ring (105), the locking assembly locks. When the rubber cylinder (108) slides above the throwing ring (105), the locking assembly unlocks.

8. The safe stool sampling device as described in claim 7, characterized in that: The sampling cylinder (1) has multiple sliding holes (109) on its side wall. One end of the U-shaped rod (110) is fixed to the top of the locking cylinder (107), and the other end of the U-shaped rod (110) is fixed to the top of the piston (301).

9. The safe stool sampling device as described in claim 8, characterized in that: The side wall of the small diameter section (201) is provided with a limiting groove (205). The second sampling mechanism includes a sampling rod (401) and an auger blade (402) provided on the sampling rod (401). A limiting rod (403) is provided near the bottom of the sampling rod (401). The top end of the limiting rod (403) is inserted into the limiting groove (205). The top end of the sampling rod (401) is provided with a first connecting block. The top of the first connecting block is provided with a connecting groove. The bottom end of the threaded rod (302) is provided with a second connecting block. The second connecting block is inserted into the connecting groove. The guide rod (303) is slidably arranged, and the top of the piston (301) is provided with a guide hole (304). The guide rod (303) can be inserted into the guide hole (304) due to sliding, and the bottom end of the guide rod (303) is spaced apart from the bottom of the guide hole (304). The guide rod (303) can be pulled out of the guide hole (304) due to sliding.

10. The safe stool sampling device as described in claim 9, characterized in that: A mounting plate (111) is provided on one side of the first sealing plate (101). An adjusting rod (501) is provided through the mounting plate (111). A cover (504) is provided at the bottom of the adjusting rod (501). A limiting plate (502) is provided at the top of the adjusting rod (501). A return spring (503) is provided between the limiting plate (502) and the first sealing plate (101). When the return spring (503) is in its natural state, the cover (504) is located above the discarding mechanism (2). The cover (504) can be located below the sampling cylinder (1) due to the sliding of the adjusting rod (501). The cover (504) can be arranged coaxially with the sampling cylinder (1) due to the rotation of the adjusting rod (501).

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