Sampling assembly and IVD instrument
By designing the sampling components of the protective tube, self-response assembly and sensing detector, the problem of easy damage to the sampling needle during operation is solved, and effective protection and safe retraction of the sampling needle is achieved, avoiding equipment damage and potential accidents.
Patent Information
- Application Number
- CN202420525614.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-03-18
AI Technical Summary
The prior art lacks protection for sampling needles, which leads to the possibility of impacting foreign objects when position shifts occur during operation, resulting in irreversible damage and even accidents.
A sampling assembly is designed, including a protective tube, a sampling needle, a self-response assembly and a sensor detector. The sampling needle is slidably arranged in the protective tube, and the self-response assembly is used to buffer the impact of the sampling needle and drive the needle tip to extend, and the sensor detector detects whether the needle tip is retracted into the protective tube.
Through the design of the protective tube, the sampling needle is effectively protected from damage due to impact; the use of the self-response component buffers the impact and ensures that the needle tip can be safely retracted; the feedback mechanism of the sensing detector prevents unnecessary movement and avoids further damage.
Smart Images
Figure CN222748333U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and in particular to a sampling assembly and an IVD instrument. Background Art
[0002] IVD (In Vitro Diagnosis) in vitro testing equipment is an important part of in vitro diagnosis, which usually includes IVD instruments and sample delivery systems.
[0003] Among them, the sampling needle and the reagent needle are important structures for absorbing samples and reagents, so the protection of the sampling needle is particularly critical. If there is a position deviation during operation, the instrument sampling needle will hit a foreign object. If the sampling needle is subjected to excessive pressure, it will cause irreversible damage and the sampling needle needs to be replaced. In more serious cases, an accident will occur, causing personal and property losses. However, the existing technology lacks protection for the sampling needle. Utility Model Content
[0004] The present application provides a sampling assembly and an IVD instrument, aiming to solve the problem of lack of protection for the sampling needle in the prior art.
[0005] To achieve the above objectives, the present application proposes a sampling assembly. The sampling assembly comprises:
[0006] Protective tube;
[0007] A sampling needle, slidably disposed on the protection tube and receivable in the protection tube;
[0008] A self-restoring component is arranged in the protection tube, the sampling needle is connected to the self-restoring component, and the self-restoring component is used to buffer the impact on the sampling needle and to drive the needle tip of the sampling needle to extend outside the protection tube;
[0009] The sensor detector is arranged on the inner wall of one end of the protection tube away from the self-restoring component, and is used to detect whether the needle tip of the sampling needle is retracted into the protection tube.
[0010] In some embodiments, the protection tube is provided with a first locking portion, the sensor detector is provided with a second locking portion, and the sensor detector and the protection tube are assembled by the cooperation and locking between the first locking portion and the second locking portion;
[0011] Therein, a screw locking structure is provided between the first locking portion and the second locking portion; or a snap locking structure is provided between the first locking portion and the second locking portion.
[0012] In some embodiments, the sensor detector includes an infrared photocoupler, a microwave sensor, and a laser sensor.
[0013] In some embodiments, a rocker arm is also included, one end of which is connected to a driving mechanism, and the driving mechanism can drive the rocker arm to rotate around its one end on a horizontal plane and / or move in a vertical direction; the protective tube and the sampling needle are arranged at the other end of the rocker arm.
[0014] In some embodiments, the protective tube is fixed to the bottom of the rocker arm, and a corresponding through hole is provided on the rocker arm for the upper end of the sampling needle to pass through.
[0015] In some embodiments, at least one limiting guide is further included, and at least one limiting guide is fixed in the protective tube at an axial interval along the protective tube. A guide hole is provided on the limiting guide, and the sampling needle is guided and matched with the guide hole.
[0016] In some embodiments, two of the limiting guide members are spaced apart, and the self-restoring component is disposed between the two limiting guide members, and the self-restoring component includes:
[0017] A mounting seat, which is sleeved and fixed on the outer wall of the sampling needle so as to move along with the sampling needle;
[0018] A telescopic spring is sleeved on the sampling needle, one end of the telescopic spring is connected to the limiting guide member close to the rocker arm, and the other end is connected to the mounting seat.
[0019] In some embodiments, the self-restoring assembly is disposed between the limiting guide and the rocker arm, and the limiting guide is also used to limit the movement of the self-restoring assembly. The self-restoring assembly includes:
[0020] A mounting seat, which is sleeved and fixed on the outer wall of the sampling needle so as to move along with the sampling needle;
[0021] A telescopic spring is sleeved on the sampling needle, one end of the telescopic spring is connected to the mounting seat, and the other end is connected to the rocker arm.
[0022] In some embodiments, the self-restoring assembly is disposed between the limiting guide and the rocker arm, and the limiting guide is also used to limit the movement of the self-restoring assembly. The self-restoring assembly includes:
[0023] A mounting seat, which is sleeved and fixed on the outer wall of the sampling needle so as to move along with the sampling needle;
[0024] A first magnet is disposed on the mounting seat;
[0025] A second magnet is disposed on the rocker arm corresponding to the first magnet;
[0026] Wherein, the first magnet and the second magnet are in a repulsive state.
[0027] The present application also provides an IVD instrument, which includes the sampling component as described above.
[0028] The technical solution of the present application proposes a sampling assembly. The sampling assembly includes a protective tube, a sampling needle, a self-restoring assembly and a sensor detector; the sampling needle is slidably arranged in the protective tube and can be accommodated in the protective tube; when the sampling needle moves downward and the pressure on the needle tip is large, the sampling needle retracts and slides into the protective tube, and the protective tube forms protection for the sampling needle; the self-restoring assembly is arranged in the protective tube, and the sampling needle is connected to the self-restoring assembly. The self-restoring assembly is used to buffer the impact on the sampling needle and to drive the needle tip of the sampling needle to extend outside the protective tube; the sensor detector is arranged on the inner wall of the protective tube away from the end of the self-restoring assembly, and is used to detect whether the needle tip of the sampling needle is retracted into the protective tube; and after detecting that the sampling needle is completely retracted into the protective tube, the information can be fed back, and the host control unit stops the movement to prevent damage to the entire sampling assembly. Therefore, the sampling assembly provided by the technical solution of the present application has a simple structure and can form effective protection for the sampling needle. The present application also provides an IVD instrument. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0030] Figure 1 This is a schematic diagram of the structure of a sampling assembly according to an embodiment of the present application. Figure 1 ;
[0031] Figure 2 This is a schematic diagram of the structure of a sampling assembly according to an embodiment of the present application. Figure 2 ;
[0032] Figure 3 This is a schematic diagram of the structure of a sampling assembly according to an embodiment of the present application. Figure 3 . DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0034] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0035] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0036] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0037] See also Figure 1-Figure 3 As shown, the present application proposes a sampling assembly 100. The sampling assembly 100 includes a protective tube 10, a sampling needle 20, a self-restoring assembly 30 and a sensor detector 40; the sampling needle 20 is slidably disposed in the protective tube 10 and can be accommodated in the protective tube 10; the self-restoring assembly 30 is disposed in the protective tube 10, and the sampling needle 20 is connected to the self-restoring assembly 30, and the self-restoring assembly 30 is used to buffer the impact on the sampling needle 20 and to drive the needle tip of the sampling needle 20 to extend outside the protective tube 10; the sensor detector 40 is disposed on the inner wall of the end of the protective tube 10 away from the self-restoring assembly 30, and is used to detect whether the needle tip of the sampling needle 20 is retracted into the protective tube 10.
[0038] In the natural state, the self-restoring component 30 drives the needle tip of the sampling needle 20 to be exposed outside the protective tube 10, and the sampling component 100 moves as a whole. The sampling needle 20 is used as the component for actually performing the sampling operation and is used to sample the reagent sample or other liquid after moving.
[0039] When the tip of the sampling needle 20 touches a foreign object, the sampling needle 20 is impacted and retracts into the protective tube 10, and the self-restoring component 30 connected to the sampling needle 20 is squeezed. Specifically, when the sampling needle 20 is subjected to a small impact force, the self-restoring component 30 can effectively buffer the impact force and play a certain role in protecting the needle head; when the sampling needle 20 is subjected to a large impact force, the needle head of the sampling needle 20 will overcome the elastic force of the self-restoring component 30, slide and completely retract into the protective tube 10, so as to protect the sampling needle 20 through the protective tube 10. Further, when the sampling needle 20 is completely retracted into the protective tube 10, the sensor detector 40 arranged on the inner wall of the end of the protective tube 10 away from the self-restoring component 30 detects the signal, and then the information can be fed back to alarm, and the host control unit stops the movement to prevent the continued movement of the sampling component 100 from causing damage to the entire sampling component 100.
[0040] It is worth noting that in certain working scenarios of the sampling needle 20, the sampling needle 20 needs to puncture the test tube cap to complete the operation of drawing the reagent sample; and when puncturing the test tube cap, the sampling needle 20 will also be subject to a certain resistance, prompting the needle head of the sampling needle 20 to move toward the protective tube 10. It can be understood that in this process, the more the needle tip moves toward the protective tube 10, the greater the force on the self-restoring component 30 connected thereto, and based on the relationship between the action force and the reaction force, the driving force of the self-restoring component 30 on the sampling needle 20 is also greater. When the critical value is reached, the sampling needle 20 can pass through the test tube cap and enter the test tube. In this case, when the needle tip pierces the test tube cap, the sampling needle 20 does not completely enter the protective tube 10, and thus, the sensor detector 40 will not generate a false alarm due to the movement of the sampling needle 20 during the puncture process.
[0041] In some embodiments, a first locking portion (not shown in the drawings) is provided on the protective tube 10, and a second locking portion (not shown in the drawings) is provided on the sensor detector 40, and the sensor detector 40 and the protective tube 10 are assembled by the matching locking portion between the first locking portion and the second locking portion.
[0042] In this embodiment, through the cooperation of the first locking part and the second locking part, the sensor detector 40 can be firmly fixed on the protection tube 10, and is not easy to loosen or fall off, thereby ensuring its stability and reliability. When the sensor detector 40 needs to be replaced or repaired, the operator can easily unlock the locking part, perform the corresponding operation, and then re-lock it, which facilitates the replaceability of the sensor detector 40.
[0043] Among them, there may be a screw locking structure between the first locking part and the second locking part, and the screw locking structure uses screws to realize the locking between the sensor detector 40 and the protective tube 10, thereby ensuring the stability of the structure. Alternatively, there may be a snap-on locking structure between the first locking part and the second locking part; it may be a snap-on member provided between the sensor detector 40 and the protective tube 10 and a notch or protrusion provided corresponding to the snap-on member, and the snap-on locking structure may realize the rapid locking and unlocking of the sensor detector 40. Both the screw locking structure and the snap-on locking structure are common assembly methods between components in the mechanical field, and therefore, those skilled in the art may set them up based on the prior art, and the specific structure will not be described in detail here.
[0044] In some embodiments, the sensor detector 40 includes an infrared photocoupler, a microwave sensor, a laser sensor, etc. These sensors can measure the position of the sampling needle 20 based on different working principles, and can provide information feedback after the sampling needle 20 is completely retracted into the protective tube 10.
[0045] See also Figure 1-Figure 3 As shown, in some embodiments, the sampling assembly 100 also includes a rocker arm 50, one end of which is connected to a driving mechanism (not shown in the drawings), and the driving mechanism can drive the rocker arm 50 to rotate around its one end on a horizontal plane and / or move in a vertical direction; the protective tube 10 and the sampling needle 20 are arranged at the other end of the rocker arm 50.
[0046] In this embodiment, the rocker arm 50 serves as a connection and support structure, one end of which is connected to the driving mechanism, which is the power source for the movement of the rocker arm 50; the other end of the rocker arm 50 is fixed with the protection tube 10 and the sampling needle 20. In this way, the protection tube 10 and the sampling needle 20 can be adjusted in position and direction through the movement of the rocker arm 50, giving the sampling assembly 100 higher flexibility, so that it can adapt to various complex sampling environments and operation requirements.
[0047] The driving mechanism drives the rocker arm 50 to rotate on the horizontal plane, so that the sampling needle 20 can easily reach the sampling point that is difficult to access, thereby expanding the sampling range. In addition to horizontal rotation, the driving mechanism can also drive the rocker arm 50 to move in the vertical direction, so that the sampling assembly 100 can adapt to sampling requirements at different heights, further improving its practicality.
[0048] See also Figure 1-Figure 3 As shown, in some embodiments, the protection tube 10 is fixed to the bottom of the rocker arm 50, and a through hole 51 is correspondingly opened on the rocker arm 50 for the upper end of the sampling needle 20 to pass through.
[0049] In this embodiment, the protective tube 10 can follow the vertical movement of the rocker arm 50 and enter the test tube or other container placed below to complete the collection of reagent samples. When a through hole 51 is correspondingly provided on the rocker arm 50 for the upper end of the sampling needle 20 to pass through, when the needle tip of the sampling needle 20 touches a foreign object and the sampling needle 20 is impacted and retracts into the protective tube 10, the through hole 51 can avoid the retraction of the sampling needle 20. The diameter of the through hole 51 is slightly larger than the diameter of the sampling needle 20.
[0050] See also Figure 1-Figure 3 As shown, in some embodiments, the sampling assembly 100 also includes at least one limiting guide 60, and the at least one limiting guide 60 is fixed in the protective tube 10 along the axial direction of the protective tube 10. A guide hole is opened on the limiting guide 60, and the sampling needle 20 is guided and matched with the guide hole.
[0051] In this embodiment, the main function of the limiting guide 60 is to limit the moving track of the sampling needle 20 and ensure that it slides along a predetermined path in the protective tube 10. This ensures that the direction of the sampling needle 20 is accurately determined when it slides, and prevents the sampling needle 20 from deflecting or shaking during the movement. The guide hole opened on the limiting guide 60 is for guiding and cooperating with the sampling needle 20; the shape and size of the guide hole need to match the sampling needle 20 to ensure that the sampling needle 20 can pass through the guide hole smoothly and will not interfere with the guide hole.
[0052] When a plurality of limiting guide members 60 are fixed at intervals along the axial direction of the protection tube 10 , it can be ensured that the limiting guide members 60 can provide an effective guiding function over the entire axial length of the protection tube 10 .
[0053] See also Figure 2 As shown, in some embodiments, two limiting guide members 60 are arranged at intervals, and the self-restoring assembly 30 is arranged between the two limiting guide members 60, and the self-restoring assembly 30 includes a mounting seat 31 and a telescopic spring 32; the mounting seat 31 is sleeved and fixed on the outer wall of the sampling needle 20 to move with the sampling needle 20; the telescopic spring 32 is sleeved on the sampling needle 20, one end of the telescopic spring 32 is connected to the limiting guide member 60 close to the rocker arm 50, and the other end is connected to the mounting seat 31.
[0054] In this embodiment, a specific arrangement of the limiting guide 60 and the self-restoring assembly 30 is proposed. The self-restoring assembly 30 is arranged between two spaced limiting guides 60, and the two limiting guides 60 can be arranged in any section above the sensor detector 40 in the protection tube 10. Therefore, the self-restoring assembly 30 can be arranged in the middle or upper part of the protection tube 10 according to the specific arrangement positions of the two limiting guides 60; while improving the guidance of the sampling needle 20, the stability of the sampling needle 20 during the entire movement process can also be improved.
[0055] The self-restoring assembly 30 includes a mounting seat 31 and a telescopic spring 32. In a natural state, the telescopic spring 32 is in a compressed state. Through the structural positional relationship between the mounting seat 31 and the telescopic spring 32 of this embodiment, when the needle tip of the sampling needle 20 touches a foreign object and slides into the protective tube 10, the telescopic spring 32 will be compressed accordingly. In this process, the telescopic spring 32 will buffer the retraction of the sampling needle 20, and the telescopic spring 32 will store energy. After the foreign object is removed or pierced, the telescopic spring 32 will use the stored energy to push the sampling needle 20 to automatically return to the initial position, which is the position where the sampling needle 20 is limited by the limiting guide 60 close to the needle tip. This automatic recovery function not only improves the operating efficiency, but also reduces the possibility of human operating errors.
[0056] See also Figure 1 As shown, in some embodiments, the self-restoring assembly 30 is arranged between the limiting guide 60 and the rocker arm 50. The limiting guide 60 is also used to limit the movement of the self-restoring assembly 30. The self-restoring assembly 30 includes a mounting seat 31 and a telescopic spring 32; the mounting seat 31 is sleeved and fixed on the outer wall of the sampling needle 20 to move with the sampling needle 20; the telescopic spring 32 is sleeved on the sampling needle 20, one end of the telescopic spring 32 is connected to the mounting seat 31, and the other end is connected to the rocker arm 50.
[0057] In this embodiment, another specific arrangement of the limiting guide 60 and the self-restoring assembly 30 is proposed. Compared with the previous arrangement, the arrangement position of the self-restoring assembly 30 is adjusted so that the telescopic spring 32 is sleeved on the sampling needle 20, one end of the telescopic spring 32 is connected to the mounting seat 31, and the other end is connected to the rocker arm 50. The self-restoring assembly 30 is arranged based on the rocker arm 50, which can reduce the installation of components and reduce the complexity of the structure. The retraction and driving principle of the sampling needle 20 assembled therewith are similar to those in the previous arrangement, and will not be repeated here.
[0058] See also Figure 3 As shown, in some embodiments, the self-restoring component 30 is arranged between the limiting guide 60 and the rocker arm 50, and the limiting guide 60 is also used to limit the movement of the self-restoring component 30. The self-restoring component 30 includes a mounting seat 31, a first magnet 33 and a second magnet 34; the mounting seat 31 is sleeved and fixed on the outer wall of the sampling needle 20 to move with the sampling needle 20; the first magnet 33 is arranged on the mounting seat 31; the second magnet 34 is arranged on the rocker arm 50 corresponding to the first magnet 33; wherein the first magnet 33 and the second magnet 34 are in a repulsive state.
[0059] In this embodiment, another specific arrangement of the position limiting guide 60 and the self-restoring assembly 30 is proposed. The structure of the self-restoring assembly 30 is changed, and the self-restoring assembly 30 includes a mounting seat 31, a first magnet 33 and a second magnet 34. It can be understood that the first magnet 33 and the second magnet 34 always maintain a repulsive state.
[0060] When the tip of the sampling needle 20 touches a foreign object and slides into the protective tube 10, the mounting seat 31 and the first magnet 33 will also move accordingly. Due to the repulsive force between the first magnet 33 and the second magnet 34, the repulsive force buffers the retraction of the sampling needle 20; when the foreign object is removed or pierced, the repulsive force helps the sampling needle 20 return to the initial position more quickly and smoothly, realizing the self-recovery function. This magnetic repulsion self-recovery design not only reduces the friction and wear of mechanical parts, but also improves the response speed and accuracy of the recovery action.
[0061] Similarly, the presence of the limiting guide 60 ensures the stability and directionality of the self-restoring assembly 30 in the present embodiment during movement, and can effectively prevent the self-restoring assembly 30 from deflecting or shaking during movement, thereby ensuring that the sampling needle 20 can accurately return to the predetermined position.
[0062] In summary, the technical solution provided in the present application can protect the sampling needle 20 and improve the convenience and efficiency of operation through the assembly between the sampling needle 20, the protective tube 10, the self-restoring component 30 and the limiting guide 60.
[0063] The present application also provides an IVD instrument, which includes the above sampling assembly 100. Since the IVD instrument adopts all technical solutions of all embodiments of the above sampling assembly 100, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0064] The above description is only a partial or preferred embodiment of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.
Claims
1. A sampling assembly, characterized in that: The sampling assembly comprises: Protective tube; A sampling needle, slidably disposed on the protection tube and receivable in the protection tube; A self-restoring component is arranged in the protection tube, the sampling needle is connected to the self-restoring component, and the self-restoring component is used to buffer the impact on the sampling needle and to drive the needle tip of the sampling needle to extend outside the protection tube; The sensor detector is arranged on the inner wall of one end of the protection tube away from the self-restoring component, and is used to detect whether the needle tip of the sampling needle is retracted into the protection tube.
2. The sampling assembly according to claim 1, characterized in that: The protection tube is provided with a first locking portion, the sensor detector is provided with a second locking portion, and the sensor detector and the protection tube are assembled by the cooperation and locking between the first locking portion and the second locking portion; Therein, a screw locking structure is provided between the first locking portion and the second locking portion; or a snap locking structure is provided between the first locking portion and the second locking portion.
3. The sampling assembly according to claim 2, characterized in that: The sensor detector includes an infrared photocoupler, a microwave sensor and a laser sensor.
4. The sampling assembly according to claim 1, characterized in that: It also includes a rocker arm, one end of which is connected to a driving mechanism, and the driving mechanism can drive the rocker arm to rotate around its one end on a horizontal plane and / or move in a vertical direction; the protective tube and the sampling needle are arranged at the other end of the rocker arm.
5. The sampling assembly according to claim 4, characterized in that: The protective tube is fixed to the bottom of the rocker arm, and a through hole is correspondingly provided on the rocker arm for the upper end of the sampling needle to pass through.
6. The sampling assembly according to claim 4, characterized in that: It also includes at least one limiting guide, which is fixed in the protection tube at intervals along the axial direction of the protection tube. A guide hole is opened on the limiting guide, and the sampling needle is guided and matched with the guide hole.
7. The sampling assembly according to claim 6, characterized in that The limiting guide members are provided with two at intervals, the self-restoring assembly is provided between the two limiting guide members, and the self-restoring assembly comprises: A mounting seat, which is sleeved and fixed on the outer wall of the sampling needle so as to move along with the sampling needle; A telescopic spring is sleeved on the sampling needle, one end of the telescopic spring is connected to the limiting guide member close to the rocker arm, and the other end is connected to the mounting seat.
8. The sampling assembly according to claim 6, characterized in that: The self-restoring component is arranged between the limiting guide and the rocker arm, and the limiting guide is also used to limit the movement of the self-restoring component. The self-restoring component includes: A mounting seat, which is sleeved and fixed on the outer wall of the sampling needle so as to move along with the sampling needle; A telescopic spring is sleeved on the sampling needle, one end of the telescopic spring is connected to the mounting seat, and the other end is connected to the rocker arm.
9. The sampling assembly according to claim 6, characterized in that: The self-restoring component is arranged between the limiting guide and the rocker arm, and the limiting guide is also used to limit the movement of the self-restoring component. The self-restoring component includes: A mounting seat, which is sleeved and fixed on the outer wall of the sampling needle so as to move along with the sampling needle; A first magnet is disposed on the mounting seat; A second magnet is disposed on the rocker arm corresponding to the first magnet; Wherein, the first magnet and the second magnet are in a repulsive state.
10. An IVD instrument, characterized in that: Comprising a sampling component as described in any one of claims 1-9.