Syringe needle guide mechanism and sampling instrument
By designing the syringe needle guide mechanism, the movement of the guide sheet ensures accurate insertion of the needle, the problems of insufficient needle manufacturing accuracy and bending deviation in the prior art are solved, and the accuracy and reliability of sample extraction are improved.
Patent Information
- Application Number
- CN202421603190.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-08
AI Technical Summary
Existing syringe needles may be due to insufficient manufacturing accuracy or bending and deflecting during the puncture process, resulting in low sample extraction accuracy and reliability.
A syringe needle guide mechanism is designed, including a base, a first guide sheet and a second guide sheet. By moving these guide sheets, the syringe needle can be accurately inserted into the test tube in the Z-axis direction to prevent bending and deviation.
The guide mechanism ensures that the syringe needle is fully aligned with the test tube, providing precise guidance and preventing the needle from bending and deflecting, thereby improving the accuracy and reliability of sample extraction.
Smart Images
Figure CN222964943U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sampling with a collection tube, in particular to a syringe needle alignment mechanism and a sampler. Background Art
[0002] Syringes and test tubes are widely used in biochemical and clinical medical tests. It is often necessary to pierce the stopper of a vacuum test tube with the needle of a syringe and extract the sample inside the tube. For example, extract blood samples from vacuum blood collection tubes, centrifuge tubes, PRP tubes, etc.
[0003] Currently, some samplers can fully automatically perform the operations of piercing the stopper of a syringe and extracting the sample. However, there may be some problems during use. Some may have limited manufacturing precision of the syringe needle itself, and the needle may not be straight enough to align with the test tube; some needles may bend and deviate during the process of piercing the stopper and then touch the tube wall, affecting the sample extraction operation, with low accuracy and reliability. Summary of the Utility Model
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a syringe needle alignment mechanism.
[0005] The utility model also provides a sampler with the above syringe needle alignment mechanism.
[0006] The syringe needle alignment mechanism according to the first aspect embodiment of the utility model has an X-axis direction and a Z-axis direction, and includes: a base; a first guide piece having a first guide hole penetrating along the Z-axis direction, and the first guide piece can move relative to the base along the X-axis direction; a second guide piece having a second guide hole penetrating along the Z-axis direction, and the second guide piece can move relative to the base along the X-axis direction. The projection of the second guide hole and the first guide hole in the Z-axis direction at least partially overlap, and the overlapping area gradually changes as the first guide piece and the second guide piece move synchronously and in opposite directions relative to the base along the X-axis direction. Wherein, the first guide hole and the second guide hole can successively insert a syringe needle and overlap each other to align the syringe needle.
[0007] At least, it has the following beneficial effects: The guiding mechanism is provided with a first guiding piece and a second guiding piece on the base that can move along the X-axis direction. The first guiding piece and the second guiding piece are separated and have a first guiding hole and a second guiding hole that penetrate along the Z-axis direction. The syringe needle is inserted into the first guiding hole and the second guiding hole in sequence. As the first guiding piece and the second guiding piece move synchronously and in opposite directions along the X-axis direction relative to the base, the first guiding hole and the second guiding hole can overlap each other to straighten the syringe needle, making the syringe needle completely aligned with the test tube, and providing an accurate guiding effect during the process of the syringe needle piercing the tube plug, preventing bending and offset, ensuring the smooth extraction of samples by the syringe. This guiding mechanism can achieve the functions of straightening and guiding the syringe needle, with high reliability.
[0008] According to some embodiments of the present invention, the first guiding hole includes a first needle-straightening section and a first needle-inserting section that are sequentially connected in the positive X-axis direction. The second guiding hole includes a second needle-inserting section and a second needle-straightening section that are sequentially connected in the positive X-axis direction. The first needle-inserting section and the second needle-inserting section can be sequentially inserted by the syringe needle. When the first guiding piece and the second guiding piece move synchronously in the positive X-axis direction and the negative X-axis direction respectively relative to the base, the first needle-straightening section and the second needle-straightening section overlap each other and gradually converge to straighten the syringe needle.
[0009] According to some embodiments of the present invention, both the first needle-straightening section and the second needle-straightening section are V-shaped and the sharp corners are transitioned with rounded corners.
[0010] According to some embodiments of the present invention, on one side edge of the sharp corner of the second needle-straightening section of the second guiding piece, there is a needle-straightening convex wall. The needle-straightening convex wall extends along the Z-axis direction from one side of the second guiding piece and passes through the first guiding hole. The projection of the needle-straightening convex wall in the Z-axis direction is flush with the edge of the second needle-straightening section. The needle-straightening convex wall can cooperate with the second needle-straightening section and the first needle-straightening section to jointly straighten the syringe needle.
[0011] According to some embodiments of the present invention, the first guiding hole further includes an avoidance hole. The first needle-straightening section, the first needle-inserting section, and the avoidance hole are sequentially connected in the positive X-axis direction. The avoidance hole can accommodate the needle-straightening convex wall.
[0012] According to some embodiments of the present invention, two groups of the first guiding holes are arranged at intervals along the X-axis direction on the first guiding piece, and two groups of the second guiding holes are arranged at intervals along the X-axis direction on the second guiding piece. The two groups of the first guiding holes and the two groups of the second guiding holes correspond to each other one by one.
[0013] According to some embodiments of the present utility model, a first rack is connected to the first guide piece, a second rack is connected to the second guide piece, a stepping motor is installed on the base, a driving gear is installed on the output shaft of the stepping motor, and the first rack and the second rack are parallel to each other and meshed with the driving gear in opposite directions.
[0014] According to some embodiments of the present utility model, a first slider is connected to the first guide piece, a second slider is connected to the second guide piece, a slide rail is installed on the base along the X-axis direction, and the first slider and the second slider are both slidably connected to the slide rail.
[0015] The sampler according to the second aspect embodiment of the present utility model includes: a workbench; a syringe pusher seat capable of installing a syringe and driving the syringe to move relative to the workbench along the Z-axis direction; a test tube carrier disposed on the workbench and located on the extension line of the moving path of the syringe pusher seat, the test tube carrier being used for loading a test tube and making the test tube face the syringe needle; the syringe needle guiding and straightening mechanism according to the above first aspect embodiment of the present utility model, the base is disposed on the workbench and is located between the syringe pusher seat and the test tube carrier in the Z-axis direction, and under the mutual overlapping and straightening action of the first guiding hole and the second guiding hole, the syringe needle can be guided to move relative to the Z-axis direction so as to be inserted into the test tube.
[0016] It has at least the following beneficial effects: The sampler of the present utility model arranges the syringe needle guiding and straightening mechanism between the syringe pusher seat and the test tube carrier. The first guide piece and the second guide piece capable of moving along the X-axis direction are arranged on the base. The first guide piece and the second guide piece are separated to have a first guiding hole and a second guiding hole penetrating along the Z-axis direction. The syringe needle is inserted into the first guiding hole and the second guiding hole in sequence. As the first guide piece and the second guide piece move synchronously and in opposite directions relative to the base along the X-axis direction, the first guiding hole and the second guiding hole can mutually overlap and straighten the syringe needle, so that the syringe needle is completely aligned with the test tube. Under the mutual overlapping and straightening action of the first guiding hole and the second guiding hole, the syringe needle can be guided to move relative to the Z-axis direction and accurately inserted into the test tube, preventing bending and offset, ensuring the smooth extraction of samples by the syringe. The syringe needle guiding and straightening mechanism can realize the straightening and guiding effects on the syringe needle, and has high reliability.
[0017] According to some embodiments of the present utility model, the syringe pusher seat includes a barrel seat for installing the syringe barrel and a push rod seat for installing the syringe push rod. The barrel seat and the push rod seat can move synchronously relative to the workbench along the Z-axis direction, and the push rod seat can also move relative to the barrel seat along the Z-axis direction.
[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings
[0019] The present utility model will be further described below in conjunction with the drawings and embodiments, where:
[0020] Figure 1 is a schematic structural diagram of one perspective of the sampler in the embodiment of the present utility model;
[0021] Figure 2 is a schematic structural diagram of another perspective of the sampler in the embodiment of the present utility model;
[0022] Figure 3 is a schematic structural diagram of the syringe needle guiding mechanism when inserting the syringe needle in the first embodiment of the present utility model;
[0023] Figure 4 is a schematic structural diagram of the syringe needle guiding mechanism when straightening the syringe needle in the first embodiment of the present utility model;
[0024] Figure 5 is a schematic structural diagram of the first guiding piece in the first embodiment of the present utility model;
[0025] Figure 6 is a schematic structural diagram of the second guiding piece in the first embodiment of the present utility model;
[0026] Figure 7 is a schematic structural diagram of the syringe needle guiding mechanism in the first embodiment of the present utility model;
[0027] Figure 8 is a schematic structural diagram of the syringe needle guiding mechanism when inserting the syringe needle in the second embodiment of the present utility model;
[0028] Figure 9 is a schematic structural diagram of the syringe needle guiding mechanism when straightening the syringe needle in the second embodiment of the present utility model.
[0029] Reference numerals in the drawings: workbench 1, syringe push seat 2, syringe barrel seat 21, push rod seat 22, syringe 3, syringe needle 31, syringe barrel 32, syringe push rod 33, syringe needle guiding mechanism 4, base 41, first guiding piece 42, first guiding hole 43, first needle straightening section 431, first needle inserting section 432, avoidance hole 433, second guiding piece 44, second guiding hole 45, second needle straightening section 451, second needle inserting section 452, needle straightening convex wall 46, first rack 47, second rack 48, stepping motor 49, driving gear 410, first slider 411, second slider 412, slide rail 413, test tube carrier 5, test tube 6, tube plug 61. Specific embodiments
[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.
[0031] In the description of the present utility model, it should be understood that the orientation descriptions, such as the X-axis, Z-axis, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.
[0032] In the description of the present utility model, if the first and second are described only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.
[0033] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.
[0034] Referring to Figures 1 to 9 , the present utility model discloses a syringe needle guiding mechanism having an X-axis direction and a Z-axis direction, including a base 41, a first guiding piece 42, a first guiding hole 43, a second guiding piece 44 and a second guiding hole 45.
[0035] It should be noted that the syringe 3 includes a syringe needle 31, a syringe barrel 32 and a syringe plunger 33. The syringe needle 31 is installed at one end of the syringe barrel 32, and the syringe plunger 33 is slidably installed in the syringe barrel 32. A sample can be placed in the test tube 6, and a tube plug 61 can be installed at the opening position of the test tube 6.
[0036] Among them, referring to Figure 7, the first guiding piece 42 has a first guiding hole 43 penetrating along the Z-axis direction, the first guiding piece 42 can move relative to the base 41 along the X-axis direction, the second guiding piece 44 has a second guiding hole 45 penetrating along the Z-axis direction, the second guiding piece 44 can move relative to the base 41 along the X-axis direction, at least part of the projections of the second guiding hole 45 and the first guiding hole 43 in the Z-axis direction overlap, and the area of the overlapping region gradually changes as the first guiding piece 42 and the second guiding piece 44 move synchronously and in opposite directions relative to the base 41 along the X-axis direction.
[0037] It can be understood that taking the Figure 3 shown position as an example, when the first guiding piece 42 moves to the Figure 4 shown position along the positive X-axis direction, and at the same time the second guiding piece 44 moves to the Figure 4 shown position along the negative X-axis direction, the area of the overlapping region gradually becomes smaller; similarly, when the first guiding piece 42 moves from the Figure 4 shown position to the Figure 3 shown position along the negative X-axis direction, and at the same time the second guiding piece 44 moves from the Figure 4 shown position to the Figure 3 shown position along the positive X-axis direction, the area of the overlapping region gradually becomes larger.
[0038] During use, referring to Figure 3 , Figure 4 , Figure 8 and Figure 9 , the first guiding hole 43 and the second guiding hole 45 can be successively inserted by the syringe needle 31. As the first guiding piece 42 and the second guiding piece 44 move synchronously and in opposite directions relative to the base 41 along the X-axis direction, the first guiding hole 43 and the second guiding hole 45 can overlap with each other to straighten the syringe needle 31, align the syringe needle 31 completely with the test tube 6, and provide an accurate guiding effect during the process of the syringe needle 31 piercing into the tube plug 61, prevent bending and deviation, and ensure that the syringe 3 smoothly extracts the sample.
[0039] This guiding mechanism can achieve the functions of straightening and guiding the syringe needle 31, and has high reliability.
[0040] In some embodiments of the present invention, referring to Figure 5 and Figure 9 , the first guiding hole 43 includes a first needle-straightening section 431 and a first needle-inserting section 432 that are sequentially connected along the positive X-axis direction. Referring to Figure 6 and Figure 9 , the second guiding hole 45 includes a second needle-inserting section 452 and a second needle-straightening section 451 that are sequentially connected along the positive X-axis direction; referring to Figure 3 , Figure 4 , Figure 8 and Figure 9, the first needle insertion section 432 and the second needle insertion section 452 can be successively inserted by the syringe needle 31. When the first guide piece 42 and the second guide piece 44 move synchronously along the positive X-axis direction and the negative X-axis direction respectively relative to the base, the first needle supporting section 431 and the second needle supporting section 451 overlap each other and gradually converge to straighten the syringe needle 31.
[0041] It can be understood that the space of the first needle insertion section 432 relative to the first needle supporting section 431 is larger, and the space of the second needle insertion section 452 relative to the second needle supporting section 451 is larger. In this way, even if the syringe needle 31 is not straight enough, it can be successively inserted into the first needle insertion section 432 and the second needle insertion section 452.
[0042] In some embodiments, both the first needle supporting section 431 and the second needle supporting section 451 are V-shaped and the sharp corners are transitioned with rounded corners, so that when the first needle supporting section 431 and the second needle supporting section 451 gradually converge the syringe needle 31, the final straightening and centering effect can be achieved.
[0043] In the second embodiment of the present utility model, referring to Figure 8 and Figure 9 , both the first guide hole 43 and the second guide hole 45 are water-drop shaped, which can achieve a better effect of converging and straightening.
[0044] In the first embodiment of the present utility model, referring to Figure 3 , Figure 4 and Figure 6 , on one side edge of the sharp corner of the second needle supporting section 451 of the second guide piece 44, a needle supporting convex wall 46 is provided. The needle supporting convex wall 46 extends along the Z-axis direction from one side of the second guide piece 44 and passes through the first guide hole 43. The projection of the needle supporting convex wall 46 in the Z-axis direction is flush with the edge of the second needle supporting section 451. The needle supporting convex wall 46 can cooperate with the second needle supporting section 451 and the first needle supporting section 431 to jointly straighten the syringe needle 31, so that the cross-section of the syringe needle 31 located in the first guide hole 43 is always under the joint limiting action of the first guide piece 42 and the needle supporting convex wall 46, with balanced force, effectively preventing the syringe needle 31 from deforming and improving the accuracy.
[0045] In some first embodiments, referring to Figure 3 , Figure 4 and Figure 5 , the first guide hole 43 further includes an avoidance hole 433. The first needle supporting section 431, the first needle insertion section 432 and the avoidance hole 433 are sequentially communicated along the positive X-axis direction. The avoidance hole 433 can accommodate the needle supporting convex wall 46.
[0046] Referring to Figure 3 and Figure 8, in some embodiments, two sets of first guiding holes 43 are arranged at intervals along the X-axis direction on the first guiding piece 42, and two sets of second guiding holes 45 are arranged at intervals along the X-axis direction on the second guiding piece 44. The two sets of first guiding holes 43 and the two sets of second guiding holes 45 correspond to each other one by one, and can simultaneously straighten the two syringe needles 31, improving the sampling efficiency.
[0047] Referring to Figures 5 to 7 , in some embodiments, a first rack 47 is connected to the first guiding piece 42, a second rack 48 is connected to the second guiding piece 44, a stepping motor 49 is installed on the base 41, a driving gear 410 is installed on the output shaft of the stepping motor 49, and the first rack 47 and the second rack 48 are meshed with the driving gear 410 in parallel and facing each other. When the stepping motor 49 drives the driving gear 410 to rotate, the first rack 47 and the second rack 48 can move synchronously and in opposite directions, and then the first guiding piece 42 and the second guiding piece 44 move synchronously and in opposite directions.
[0048] It can be understood that, in order to accurately restrict the moving directions of the first guiding piece 42 and the second guiding piece 44, a first slider 411 is connected to the first guiding piece 42, a second slider 412 is connected to the second guiding piece 44, a slide rail 413 is installed on the base 41 along the X-axis direction, and both the first slider 411 and the second slider 412 are slidably connected to the slide rail 413, so that the first guiding piece 42 and the second guiding piece 44 can only move synchronously and in opposite directions along the X-axis direction.
[0049] Referring to Figures 1 to 8 , the present utility model also discloses a sampling instrument, which includes a workbench 1, a syringe pusher seat 2, a test tube carrier 5 and the syringe needle guiding mechanism 4 of the above embodiment.
[0050] Among them, referring to Figure 1 and Figure 2 , the syringe pusher seat 2 can install the syringe 3 and drive the syringe 3 to move relative to the workbench 1 along the Z-axis direction. The test tube carrier 5 is arranged on the workbench 1 and is located on the extension line of the moving path of the syringe pusher seat 2. The test tube carrier 5 is used to load the test tube 6 and make the test tube 6 face the syringe needle 31.
[0051] Referring to Figure 1 , Figure 4 and Figure 9 , the base 41 is arranged on the workbench 1 and is located between the syringe pusher seat 2 and the test tube carrier 5 in the Z-axis direction. Under the mutual overlapping and straightening action of the first guiding hole 43 and the second guiding hole 45, the syringe needle 31 can be guided to move relative to the Z-axis direction so as to insert into the test tube 6.
[0052] This sampling instrument sets the syringe needle guiding mechanism 4 between the syringe push seat 2 and the test tube carrier 5. On the base 41, a first guiding piece 42 and a second guiding piece 44 that can move along the X-axis direction are provided. The first guiding piece 42 and the second guiding piece 44 are separated and have a first guiding hole 43 and a second guiding hole 45 that penetrate along the Z-axis direction. The syringe needle 31 is inserted into the first guiding hole 43 and the second guiding hole 45 in sequence. As the first guiding piece 42 and the second guiding piece 44 move synchronously and reversely along the X-axis direction relative to the base respectively, the first guiding hole 43 and the second guiding hole 45 can overlap each other to straighten the syringe needle 31, so that the syringe needle 31 is completely aligned with the test tube 6. Under the overlapping and straightening action of the first guiding hole 43 and the second guiding hole 45, the syringe needle 31 can be guided to move along the Z-axis direction and accurately inserted into the test tube 6 to prevent bending and offset, ensuring that the syringe 3 can smoothly extract the sample. The syringe needle guiding mechanism 4 can achieve the functions of straightening and guiding the syringe needle 31, with high reliability.
[0053] In some embodiments of the present utility model, referring to Figure 1 and Figure 2 , the syringe push seat 2 includes a barrel seat 21 for installing the syringe barrel 32 and a push rod seat 22 for installing the syringe push rod 33. The barrel seat 21 and the push rod seat 22 can move synchronously along the Z-axis direction relative to the workbench 1 so that the syringe needle 31 can be inserted into the test tube 6. The push rod seat 22 can also move along the Z-axis direction relative to the barrel seat 21 so that the syringe push rod 33 can extract the sample in the test tube.
[0054] Referring to Figure 2 , it can be understood that the barrel seat 21 can be specifically connected to the workbench 1 through a lead screw and nut transmission mechanism, and the push rod seat 22 can be specifically connected to the barrel seat 21 through another set of lead screw and nut transmission mechanisms.
[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.
[0056] Of course, the present utility model is not limited to the above embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. The syringe needle guiding mechanism has an X-axis direction and a Z-axis direction, characterized in that: include: Pedestal; A first guide piece having a first guide hole extending along the Z-axis direction, wherein the first guide piece can move relative to the base along the X-axis direction; a second guide plate, having a second guide hole extending along the Z-axis direction, the second guide plate being movable relative to the base along the X-axis direction, the projections of the second guide hole and the first guide hole in the Z-axis direction at least partially overlapping, and the area of the overlapping region gradually changes as the first guide plate and the second guide plate move synchronously and oppositely relative to the base along the X-axis direction; The first guide hole and the second guide hole can allow the syringe needle to be inserted in sequence and overlap each other to straighten the syringe needle.
2. The syringe needle guiding mechanism according to claim 1, characterized in that: The first guide hole includes a first needle supporting section and a first needle insertion section which are sequentially connected along the positive direction of the X-axis, and the second guide hole includes a second needle insertion section and a second needle supporting section which are sequentially connected along the positive direction of the X-axis. The first needle insertion section and the second needle insertion section can allow the syringe needle to be inserted sequentially. When the first guide plate and the second guide plate move synchronously relative to the base along the positive direction of the X-axis and the negative direction of the X-axis respectively, the first needle supporting section and the second needle supporting section overlap with each other and gradually gather together to straighten the syringe needle.
3. The syringe needle guiding mechanism according to claim 2, characterized in that: The first needle supporting section and the second needle supporting section are both V-shaped, and the sharp corners are rounded.
4. The syringe needle guiding mechanism according to claim 3, characterized in that: The second guide piece is provided with a needle supporting convex wall on one side edge at the sharp corner of the second needle supporting section. The needle supporting convex wall extends from one side of the second guide piece along the Z-axis direction and passes through the first guide hole. The projection of the needle supporting convex wall in the Z-axis direction is flush with the edge of the second needle supporting section. The needle supporting convex wall can cooperate with the second needle supporting section and the first needle supporting section to jointly straighten the syringe needle.
5. The syringe needle guiding mechanism according to claim 4, characterized in that: The first guide hole also includes an avoidance hole, the first needle support section, the first needle insertion section and the avoidance hole are connected in sequence along the positive direction of the X-axis, and the avoidance hole can accommodate the needle support protruding wall.
6. The syringe needle guiding mechanism according to any one of claims 1 to 5, characterized in that: The first guide plate is provided with two groups of the first guide holes at intervals along the X-axis direction, and the second guide plate is provided with two groups of the second guide holes at intervals along the X-axis direction, and the two groups of the first guide holes correspond to the two groups of the second guide holes one by one.
7. The syringe needle guiding mechanism according to any one of claims 1 to 5, characterized in that: The first guide piece is connected to a first rack, the second guide piece is connected to a second rack, a stepper motor is mounted on the base, a driving gear is mounted on the output shaft of the stepper motor, and the first rack and the second rack are parallel to each other and meshed with the driving gear in opposite directions.
8. The syringe needle guiding mechanism according to claim 7, characterized in that: The first guide piece is connected to a first slider, the second guide piece is connected to a second slider, a slide rail is installed on the base along the X-axis direction, and the first slider and the second slider are both slidably connected to the slide rail.
9. A sampler, characterized in that: include: Workbench; A syringe push seat, capable of mounting a syringe and driving the syringe to move relative to the workbench along the Z-axis direction; A test tube carrier, arranged on the workbench and located on the extension line of the moving path of the syringe pusher, the test tube carrier is used to load the test tube and make the test tube face the syringe needle; According to the syringe needle guiding mechanism according to any one of claims 1 to 8, the base is arranged on the workbench and is located between the syringe push seat and the test tube carrier in the Z-axis direction, and the syringe needle can be guided and moved relatively along the Z-axis direction under the mutual overlapping and straightening action of the first guide hole and the second guide hole so as to be inserted into the test tube.
10. The sampler according to claim 9, characterized in that: The syringe push seat includes a syringe seat for mounting the syringe barrel and a push rod seat for mounting the syringe push rod. The syringe seat and the push rod seat can move synchronously along the Z-axis direction relative to the workbench, and the push rod seat can also move along the Z-axis direction relative to the syringe seat.