Bone marrow biopsy sampling device

Abstract

The utility model relates to the technical field of medical instruments, and discloses a bone marrow biopsy sampling device which comprises a collecting tube and a puncture tube, the collecting tube comprises a connecting part and a tube body arranged at the bottom of the connecting part, and an insertion opening is formed in the connecting part; the puncture needle comprises a holding part, a needle core and a position adjusting assembly. According to the utility model, the needle core of the puncture needle is arranged to be capable of moving along the axial direction of the needle core and is matched with the position adjusting assembly for driving the needle core to move along the axial direction of the needle core; when the bone marrow tissue is obtained, medical workers can continue to execute the operation of obtaining the bone marrow tissue only by making the needle core move in the axial direction of the needle core so that the end of the needle core can return to the interior of the tube body, the operation needed when the medical workers obtain the bone marrow tissue is effectively simplified, and the time needed for obtaining the bone marrow tissue is shortened.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a bone marrow biopsy sampling device. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] Bone marrow biopsy (bone marrow biopsy tissue examination) is a method of obtaining bone marrow tissue from a patient for pathological examination. Generally, bone marrow tissue is obtained by healthcare professionals using a bone marrow biopsy sampling device.

[0004] In related technologies, known bone marrow biopsy sampling devices generally include a collection tube and a puncture needle. Before obtaining bone marrow tissue, the puncture needle needs to be inserted into the collection tube through its insertion port to penetrate the patient's body and pass through the harder bone layer. The puncture needle is then removed from the collection tube and the insertion port is sealed to restore the capacity of the collection tube. After that, the collection tube is allowed to continue to penetrate deeper into the bone marrow so that the required bone marrow tissue can be collected through the capacity of the collection tube.

[0005] It is evident that, given the known bone marrow biopsy sampling devices, the entire bone marrow tissue retrieval process is rather cumbersome and time-consuming because medical personnel need to remove the needle and seal the insertion port of the collection tube after the needle penetrates the relatively hard bone layer. Summary of the Invention

[0006] In view of this, the purpose of this utility model is to provide a bone marrow biopsy sampling device, which is expected to simplify the operation required by medical staff when obtaining bone marrow tissue and shorten the time required to obtain bone marrow tissue.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] This utility model discloses a bone marrow biopsy sampling device, comprising:

[0009] A collection tube includes a connecting part and a tube body located at the bottom of the connecting part; the connecting part is provided with an insertion port communicating with the interior of the tube body;

[0010] A puncture needle includes a grip, a needle core, and a position adjustment assembly; the grip is detachably connected to the connecting part, and the needle core is located at the bottom of the grip;

[0011] The needle core is movably connected to the grip so that the needle core can move along its own axis; the position adjustment assembly is configured to drive the needle core to move along its own axis.

[0012] Furthermore, the needle core has a movable cavity inside, and the needle core slides in conjunction with the gripping part so that the needle core can slide along its own axis;

[0013] The position adjustment assembly includes a lead screw, which is rotatably mounted on the grip. The bottom of the lead screw passes through the needle core and extends into the movable cavity. The lead screw and the needle core are threaded together.

[0014] Furthermore, the position adjustment assembly also includes a guide cylinder, which is coaxially sleeved on the outside of the lead screw;

[0015] The needle core has a guide portion at one end near the gripping part, and the guide portion is slidably disposed inside the guide cylinder.

[0016] Furthermore, the position adjustment assembly also includes an adjustment knob, which is coaxially disposed on the top of the lead screw.

[0017] Furthermore, the top of the grip is provided with a downwardly recessed clearance groove, and the adjustment knob is located within the clearance groove.

[0018] Furthermore, the gripping part has a receiving cavity inside, and the lead screw is disposed in the receiving cavity.

[0019] Furthermore, T-shaped grooves are provided on both sides of the connecting part. Each groove extends toward the interior of the connecting part around the central axis of the tube body and around the circumference of the tube body. The top of each groove penetrates the top surface of the connecting part.

[0020] The bottom of the grip is provided with a snap-fit ​​part that corresponds to and fits the slide groove, and the snap-fit ​​part is slidably connected to the corresponding slide groove.

[0021] Furthermore, the bone marrow biopsy sampling device also includes locking components that correspond one-to-one with the snap-fit ​​parts, the locking components including a first locking hole, a second locking hole and a locking post;

[0022] The first locking hole is located on the bottom surface of the latching part, and the second locking hole is located on the inner bottom surface of the corresponding slide groove; wherein, when the latching part enters the corresponding slide groove, the first locking hole and the second locking hole are aligned.

[0023] The locking pin is disposed in the second locking hole, and the locking pin is configured to move between a locked position and an unlocked position along the axial direction of the second locking hole;

[0024] Specifically, when the locking pin is in the locked position, the locking pin can extend from the second locking hole into the first locking hole after being aligned with the second locking hole; when the locking pin is in the unlocked position, the locking pin extends out from the first locking hole aligned with the second locking hole.

[0025] Furthermore, the locking assembly also includes a movable groove, a pressing post, a first elastic element, and a second elastic element;

[0026] The movable groove is provided on the connecting part and extends horizontally, and the second locking hole in the sliding groove communicates with the corresponding movable groove;

[0027] The pressing column is slidably disposed in the movable groove, and one end of the pressing column extends to the outside of the connecting part; one end of the first elastic member is connected to the pressing column, and the other end of the first elastic member extends along the sliding direction of the pressing column and is connected to the inner wall of the movable groove.

[0028] The pressing post is provided with a first inclined surface extending along its sliding direction, and the higher side of the first inclined surface is close to the innermost side of the movable groove; the bottom of the locking post is provided with a second inclined surface adapted to the first inclined surface, and the second inclined surface slides and fits against the first inclined surface;

[0029] When the locking pin is in the locked position, the second inclined surface is on the higher side of the first inclined surface;

[0030] The second elastic element is configured to elastically hold the locking pin in the locked position, and the elastic force of the first elastic element is greater than that of the second elastic element.

[0031] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0032] The bone marrow biopsy sampling device disclosed in this utility model, by setting the needle core of the puncture needle to be able to move along its own axis, and cooperating with the position adjustment component for driving the needle core to move along its own axis, after the needle core drives the collection tube to pass through the harder bone layer in the patient's body, it is only necessary to let the needle core move along its own axis to retract its end into the tube body, so that medical staff can continue to perform the operation of obtaining bone marrow tissue. There is no need for medical staff to remove the needle core from the tube body and seal the insertion port, which effectively simplifies the operation required for medical staff to obtain bone marrow tissue and helps to shorten the time required to obtain bone marrow tissue. Attached Figure Description

[0033] Figure 1 A schematic diagram of the structure of the bone marrow biopsy sampling device provided in an embodiment of this utility model;

[0034] Figure 2 for Figure 1 The diagram shows the structure of the collection tube.

[0035] Figure 3 for Figure 1 The diagram shows the structure of the puncture needle.

[0036] Figure 4 for Figure 1 A cross-sectional view of the bone marrow biopsy sampling device shown in the image;

[0037] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0038] Figure 6 for Figure 4 The enlarged view of the structure at point B shows the state of the locking pin when it is in the locked position.

[0039] Figure 7 A schematic diagram of the snap-fit ​​portion provided in an embodiment of this utility model;

[0040] Figure 8 for Figure 2 Enlarged view of the structure at point C;

[0041] Figure 9 This is a partial structural diagram of the locking assembly provided in an embodiment of the present invention.

[0042] Icons: 10-Collection tube, 11-Connecting part, 111-Slide groove, 12-Tube body, 13-Insertion port, 20-Punch needle, 21-Holding part, 211-Avoiding groove, 212-Receiving cavity, 22-Needle core, 221-Moving cavity, 222-Guide part, 23-Position adjustment component, 231-Screw rod, 232-Guide cylinder, 233-Slide groove, 234-Adjustment knob, 24-Snap-fit ​​part, 30-Locking component, 31-First locking hole, 32-Second locking hole, 33-Locking post, 331-Second inclined surface, 34-Moving groove, 35-Pressing post, 351-First inclined surface, 36-First elastic element, 37-Second elastic element. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments. The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0044] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0045] Example 1

[0046] Embodiment 1 of this utility model discloses a bone marrow biopsy sampling device (hereinafter referred to as "sampling device" for ease of explanation), which is expected to simplify the operation required by medical staff when obtaining bone marrow tissue and shorten the time required to obtain bone marrow tissue.

[0047] like Figure 1 As shown, it illustrates the general structure of the exemplary sampling device disclosed in this embodiment. Figure 1 The sampling device shown may include a collection tube 10 and a puncture needle 20.

[0048] Combination Figure 1 and Figure 2 As shown, the collection tube 10 may include a connecting part 11 and a hollow tube body 12. The tube body 12 may be disposed at the bottom of the connecting part 11, and the connecting part 11 is provided with an insertion port 13 that communicates with the inside of the tube body 12.

[0049] Combination Figure 1 and Figure 3 As shown, the puncture needle 20 may include a gripping portion 21 and a needle core 22. The gripping portion 21 is for use by medical personnel and is detachably connected to the connection portion 11 of the collection tube 10. The needle core 22 may be disposed at the bottom of the gripping portion 21.

[0050] During use, the end of the needle core 22 furthest from the gripping part 21 can be positioned as follows: Figure 4 The needle 22 is inserted into the tube body 12 through the insertion port 13 on the connecting part 11, and the end of the needle core 22 away from the grip part 21 can extend out from the end of the tube body 12 away from the connecting part 11. After the needle core 22 is inserted into the tube body 12, the grip part 21 and the connecting part 11 are temporarily connected to form an integrated bone marrow biopsy sampling device. After that, medical staff can hold the grip part 21 of the puncture needle 20 and use the needle core 22 to puncture the harder bone layer in the patient's body.

[0051] It is understood that the structure of the bone marrow biopsy sampling device described above is the same as that of bone marrow biopsy sampling devices known in the prior art, and will not be elaborated further here.

[0052] To simplify the procedures required for obtaining bone marrow tissue and shorten the time required, this embodiment improves the puncture needle 20.

[0053] Specifically, in this embodiment, the needle core 22 is further defined to be movably connected to the gripping part 21 so that the needle core 22 can move along its own axis.

[0054] Combination Figure 4 As shown, the puncture needle 20 may also include a position adjustment component 23, which is configured to drive the needle core 22 to move along its own axis.

[0055] Based on the above configuration, assuming that in the initial state, the needle core 22 located at the bottom of the grip 21 has the longest length, at this time, the end of the needle core 22 away from the grip 21 can be inserted into the tube body 12 through the insertion port 13 on the connecting part 11, and the end of the needle core 22 away from the grip 21 can protrude from the end of the tube body 12 away from the connecting part 11, that is, as Figure 4 The state shown. Based on this, medical staff can use the bone marrow biopsy sampling device to perform a puncture operation so that the end of the needle core 22 away from the grip 21 can pass through the harder bone layer in the patient's body until the end of the needle core 22 away from the grip 21 and the end of the tube body 12 away from the connection 11 enter the bone marrow tissue together.

[0056] Subsequently, medical personnel use the position adjustment component 23 to drive the needle core 22 along its own axis toward the gripping part 21, so that the end of the needle core 22 extending outside the tube body 12 retracts into the tube body 12 and moves a certain distance inside the tube body 12, so as to form a receiving space between the end of the needle core 22 and the end of the tube body 12 inside the tube body 12. After that, medical personnel can continue to operate the tube body 12 to puncture to the appropriate position in the bone marrow, so as to obtain bone marrow tissue into the aforementioned receiving space.

[0057] As can be seen, the sampling device disclosed in this embodiment, by setting the needle core 22 of the puncture needle 20 to be able to move along its own axis, and cooperating with the position adjustment component 23 for driving the needle core 22 to move along its own axis, after the needle core 22 drives the tube body 12 of the collection tube 10 through the harder bone layer in the patient's body, it is only necessary to let the needle core 22 move along its own axis so that its end retracts into the tube body 12, so that medical staff can continue to perform the operation of obtaining bone marrow tissue. There is no need for medical staff to perform the operation of removing the needle core 22 from the tube body 12 and sealing the insertion port 13. This effectively simplifies the operation required by medical staff when obtaining bone marrow tissue and helps to shorten the time required to obtain bone marrow tissue.

[0058] The position adjustment component 23 may be constructed in a manner described below, but is not limited to.

[0059] Combination Figure 4 and Figure 5 As shown, the needle core 22 has an internal movable cavity 221 extending along its own axis, and the needle core 22 slides in conjunction with the gripping part 21 so that the needle core 22 can slide along its own axis.

[0060] The position adjustment assembly 23 may include a lead screw 231, which is rotatably mounted on the grip 21, and the axis of the lead screw 231 coincides with the axis of the needle core 22. The bottom of the lead screw 231 passes through the end of the needle core 22 and extends into the movable cavity 221, and the lead screw 231 and the needle core 22 are threadedly connected.

[0061] Thus, when the lead screw 231 rotates, based on the principle of thread transmission, the needle core 22 will move linearly along the axis of the lead screw 231, thereby achieving the purpose of making the needle core 22 move along its own axis.

[0062] Furthermore, the sliding engagement between the needle core 22 and the gripping part 21 can be achieved in the manner described below.

[0063] like Figure 5 As shown, the position adjustment assembly 23 may further include a guide cylinder 232, which is coaxially sleeved on the outside of the lead screw 231. The needle core 22 has a guide portion 222 at one end near the gripping part 21, and the guide portion 222 is slidably disposed within the guide cylinder 232. For example, a sliding groove 233 extending axially along the inner wall of the guide cylinder 232 can be provided, and the guide portion 222 can be slidably connected within the sliding groove 233 to achieve a sliding fit between the guide portion 222 and the guide cylinder 232.

[0064] like Figure 3 or Figure 5 As shown, the position adjustment assembly 23 may also include an adjustment knob 234, which is coaxially mounted on the top of the lead screw 231. It is understood that the adjustment knob 234 facilitates operation by medical personnel to rotate the lead screw 231.

[0065] Continue to refer to Figure 3 or Figure 5 Alternatively, a recessed relief groove 211 can be provided at the top of the grip 21, and the adjustment knob 234 is located inside the relief groove 211. This helps to prevent the adjustment knob 234 from protruding outside the grip 21 and affecting the grip of medical staff.

[0066] like Figure 4As shown, the gripping part 21 also has a receiving cavity 212 inside. The lead screw 231, guide cylinder 232 and other components of the position adjustment component 23 can all be located in the receiving cavity 212. The receiving cavity 212 provides protection for the components of the position adjustment component 23, such as the lead screw 231, and helps to optimize the structural design of the entire puncture needle 20 and improve the aesthetics of the puncture needle 20.

[0067] The top of the gripping part 21 can be arc-shaped so that when medical staff hold the gripping part 21, the top of the gripping part 21 can better fit the palm of the medical staff, thereby improving the comfort and stability of the medical staff when holding the gripping part 21.

[0068] Example 2

[0069] Based on Embodiment 1, this embodiment further defines the connection method between the gripping part 21 and the connecting part 11 in order to simplify the connection process between the gripping part 21 and the connecting part 11 and improve the stability of the connection.

[0070] Combination Figure 2 As shown, the connecting part 11 has T-shaped grooves 111 on both opposite sides. Figure 2 In the connection part 11, both the front and rear sides are provided with sliding grooves 111. Each sliding groove 111 extends circumferentially around the central axis of the tube body 12 towards the interior of the connection part 11. The top of each sliding groove 111 penetrates the top surface of the connection part 11.

[0071] Combination Figure 3 As shown, the bottom of the grip 21 is provided with a snap-fit ​​part 24 that corresponds to and fits the slide groove 111 one by one, and the snap-fit ​​part 24 is slidably connected to the corresponding slide groove 111. That is, the cross-section of each snap-fit ​​part 24 is T-shaped, and a single snap-fit ​​part 24 is suitable for sliding connection to a slide groove 111.

[0072] Thus, in actual use of the sampling device disclosed in this embodiment, medical personnel first insert the needle core 22 of the puncture needle 20 into the tube body 12 through the insertion port 13 on the connecting part 11, until the end of the needle core 22 away from the gripping part 21 extends to the end of the tube body 12 away from the connecting part 11. At this time, the bottom surface of the gripping part 21 contacts the top surface of the connecting part 11, and the two locking parts 24 at the bottom of the gripping part 21, together with the two sliding grooves 111 on the connecting part 11, are on the same circumference centered on the central axis of the tube body 12. Based on this, it is only necessary to rotate the entire puncture needle 20 by a certain angle around the central axis of the tube body 12 so that the two locking parts 24 on the gripping part 21 respectively enter the two sliding grooves 111 on the connecting part 11, thereby realizing the temporary connection between the gripping part 21 and the connecting part 11.

[0073] Conversely, when it is necessary to disconnect the gripping part 21 from the connecting part 11, it is only necessary to rotate the puncture needle 20 in the opposite direction by a certain angle around the central axis of the tube body 12, so that the two locking parts 24 on the gripping part 21 can be disengaged from the two sliding grooves 111 on the connecting part 11.

[0074] To further improve the stability of the gripping part 21 after the temporary connection with the connecting part 11, the sampling device disclosed in this embodiment may also include a locking component 30 corresponding to each snap-fit ​​part 24.

[0075] Combination Figures 6 to 8 As shown, the locking assembly 30 may include a first locking hole 31, a second locking hole 32, and a locking pin 33. The first locking hole 31 is located on the bottom surface of the engaging portion 24, and the second locking hole 32 is located on the inner bottom surface of the corresponding slide groove 111. When the engaging portion 24 enters the corresponding slide groove 111, the first locking hole 31 on the engaging portion 24 aligns with the second locking hole 32 within the slide groove 111.

[0076] A locking pin 33 is disposed within the second locking hole 32, and the locking pin 33 is configured to move between a locked position and an unlocked position along the axial direction of the second locking hole 32. Specifically, when the locking pin 33 is in the locked position... Figure 6 When the locking position is shown, the locking pin 33 can extend from the second locking hole 32 into the first locking hole 31 after being aligned with the second locking hole 32; when the locking pin 33 is in the unlocked position, the locking pin 33 extends from the first locking hole 31 aligned with the second locking hole 32 and retracts into the second locking hole 32.

[0077] In other words, assuming that in the initial state, the locking pins 33 in the second locking holes 32 within each slide groove 111 are all in the unlocked position, then each locking pin 33 is hidden within its corresponding second locking hole 32. In conjunction with the foregoing, when the two latching parts 24 on the grip 21 respectively enter the two slide grooves 111 on the connecting part 11, and the first locking holes 31 on each latching part 24 align with the corresponding second locking holes 32 within the slide groove 111, the locking pins 33 within each second locking hole 32 move from the unlocked position to the locked position, allowing the locking pins 33 to extend into their corresponding first locking holes 31. This further locks the position of the latching part 24 within the slide groove 111, effectively preventing the grip 21 from being accidentally rotated. Conversely, simply moving each locking pin 33 from the locked position to the unlocked position, so that each locking pin 33 exits from the corresponding first locking hole 31, will release the lock on each snap-fit ​​part 24, making it easier to remove the grip part 21 from the connecting part 11.

[0078] The locking pins 33 can be moved between the unlocked and locked positions in the manner described below.

[0079] Combination Figure 6 As shown, the locking assembly 30 may further include a movable groove 34, a pressing post 35, a first elastic element 36, and a second elastic element 37. The movable groove 34 is disposed on the connecting portion 11 and extends horizontally, and the second locking hole 32 in each sliding groove 111 communicates with the corresponding movable groove 34.

[0080] The pressing post 35 is slidably disposed within the movable groove 34, with one end of the pressing post 35 extending outside the connecting portion 11. The first elastic member 36 is disposed within the movable groove 34, with one end of the first elastic member 36 connected to the pressing post 35 and the other end of the first elastic member 36 extending along the sliding direction of the pressing post 35 and connected to the inner wall of the movable groove 34.

[0081] Among them, reference Figure 6 and Figure 9 As shown, the pressing post 35 is provided with a first inclined surface 351 extending along its sliding direction, and the higher side of the first inclined surface 351 is close to the innermost side of the movable groove 34; the bottom of the locking post 33 located in the second locking hole 32 extends into the movable groove 34, and the bottom of the locking post 33 is provided with a second inclined surface 331 that is adapted to the first inclined surface 351, and the second inclined surface 331 slides and fits against the first inclined surface 351.

[0082] When the locking pin 33 is in the locked position, the second inclined surface 331 on the locking pin 33 is on the higher side of the first inclined surface 351. The second elastic member 37 is configured to elastically hold the locking pin 33 in the locked position. The elastic force of the first elastic member 36 is greater than the elastic force of the second elastic member 37.

[0083] In this embodiment, both the first elastic element 36 and the second elastic element 37 can be springs. The second elastic element 37 can be coaxially sleeved on the outer wall of the locking post 33 and located in the movable groove 34, and both ends of the second elastic element 37 are connected to the outer wall of the locking post 33 and the top wall of the movable groove 34, respectively.

[0084] Based on the above settings, for a single locking component 30, assuming that in the initial state, the first elastic member 36 is in a naturally extended state, the second inclined surface 331 of the locking post 33 is located on the higher side of the first inclined surface 351 of the pressing post 35, and the second elastic member 37 is in a compressed state, the locking post 33 is in a locked position extending from the corresponding second locking hole 32.

[0085] When it is necessary to connect the grip 21 and the connecting part 11, the end of the pressing post 35 extending outside the connecting part 11 is first pressed, causing the pressing post 35 to move horizontally toward the innermost side of the corresponding movable groove 34. During this process, the first elastic member 36 is compressed to store a spring force, and as the pressing post 35 continues to move, the second elastic member 37, which is in a compressed state, will release the spring force to force the locking post 33 to move downward until the locking post 33 moves from the locked position to the unlocked position retracted into the second locking hole 32. After that, the aforementioned operation can be performed to allow the latching part 24 on the grip 21 to enter the corresponding slide groove 111, and to align the first locking hole 31 on the latching part 24 with the second locking hole 32 in the slide groove 111. After the first locking hole 31 on the latching part 24 aligns with the second locking hole 32 in the slide groove 111, the force acting on the pressing post 35 is released. The first elastic member 36 will release the pre-stored elastic force. Since the elastic force of the first elastic member 36 is greater than that of the second elastic member 37, the pressing post 35 can be reset under the action of the first elastic member 36. During this process, the pressing post 35 can push the locking post 33 through the first inclined surface 351, so that the locking post 33 moves from the unlocked position to the position where... Figure 6 The locking position is shown, causing the locking pin 33 to extend into the corresponding first locking hole 31, and the second elastic member 37 will be compressed again to store a spring force. Conversely, simply pressing the corresponding pressing pin 35 again will move the locking pin 33 from the locked position to the unlocked position, making it easy to detach the grip 21 from the connecting part 11.

[0086] As can be seen, the locking assembly 30 provided in this embodiment allows medical personnel to simply press the pressing posts 35 on both sides with one hand when a reliable connection between the gripping part 21 and the connecting part 11 is required, making the operation simple and convenient. Furthermore, the inclined plane transmission structure formed by the first inclined plane 351 and the second inclined plane 331 enables the transmission and engagement between the locking post 33 and the pressing post 35, which helps improve the stability of the locking post 33 when it is in the locked position.

[0087] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bone marrow biopsy sampling device, characterized in that, include: A collection tube includes a connecting part and a tube body located at the bottom of the connecting part; the connecting part is provided with an insertion port communicating with the interior of the tube body; A puncture needle includes a grip, a needle core, and a position adjustment assembly; the grip is detachably connected to the connecting part, and the needle core is located at the bottom of the grip; The needle core is movably connected to the grip so that the needle core can move along its own axis; the position adjustment assembly is configured to drive the needle core to move along its own axis.

2. The bone marrow biopsy sampling device according to claim 1, characterized in that, The needle core has a movable cavity inside, and the needle core slides in conjunction with the gripping part so that the needle core can slide along its own axis; The position adjustment assembly includes a lead screw, which is rotatably mounted on the grip. The bottom of the lead screw passes through the needle core and extends into the movable cavity. The lead screw and the needle core are threaded together.

3. The bone marrow biopsy sampling device according to claim 2, characterized in that, The position adjustment assembly also includes a guide cylinder, which is coaxially sleeved on the outside of the lead screw; The needle core has a guide portion at one end near the gripping part, and the guide portion is slidably disposed inside the guide cylinder.

4. The bone marrow biopsy sampling device according to claim 2, characterized in that, The position adjustment assembly also includes an adjustment knob, which is coaxially disposed on the top of the lead screw.

5. The bone marrow biopsy sampling device according to claim 4, characterized in that, The top of the grip is provided with a downwardly recessed clearance groove, and the adjustment knob is located in the clearance groove.

6. The bone marrow biopsy sampling device according to claim 2, characterized in that, The gripping part has a receiving cavity inside, and the lead screw is located in the receiving cavity.

7. The bone marrow biopsy sampling device according to claim 1, characterized in that, The connecting part is provided with T-shaped grooves on both sides. Each groove extends into the connecting part around the central axis of the tube body and around the circumference of the tube body. The top of each groove penetrates the top surface of the connecting part. The bottom of the grip is provided with a snap-fit ​​part that corresponds to and fits the slide groove, and the snap-fit ​​part is slidably connected to the corresponding slide groove.

8. The bone marrow biopsy sampling device according to claim 7, characterized in that, It also includes a locking component that corresponds to each of the latching parts, the locking component including a first locking hole, a second locking hole and a locking pin; The first locking hole is located on the bottom surface of the snap-fit ​​part, and the second locking hole is located on the inner bottom surface of the corresponding slide groove; wherein, when the snap-fit ​​part enters the corresponding slide groove, the first locking hole and the second locking hole are aligned. The locking pin is disposed in the second locking hole, and the locking pin is configured to move between a locked position and an unlocked position along the axial direction of the second locking hole; Specifically, when the locking pin is in the locked position, the locking pin can extend from the second locking hole into the first locking hole after being aligned with the second locking hole; when the locking pin is in the unlocked position, the locking pin extends out from the first locking hole aligned with the second locking hole.

9. The bone marrow biopsy sampling device according to claim 8, characterized in that, The locking assembly further includes a movable groove, a pressing post, a first elastic element, and a second elastic element; The movable groove is provided on the connecting part and extends horizontally, and the second locking hole in the sliding groove communicates with the corresponding movable groove; The pressing column is slidably disposed in the movable groove, and one end of the pressing column extends to the outside of the connecting part; one end of the first elastic member is connected to the pressing column, and the other end of the first elastic member extends along the sliding direction of the pressing column and is connected to the inner wall of the movable groove. The pressing post is provided with a first inclined surface extending along its sliding direction, and the higher side of the first inclined surface is close to the innermost side of the movable groove; the bottom of the locking post is provided with a second inclined surface adapted to the first inclined surface, and the second inclined surface slides and fits against the first inclined surface; When the locking pin is in the locked position, the second inclined surface is on the higher side of the first inclined surface; The second elastic element is configured to elastically hold the locking pin in the locked position, and the elastic force of the first elastic element is greater than that of the second elastic element.

Images