An automatic biopsy needle

Abstract

The application provides an automatic cutting biopsy needle and relates to the technical field of medical devices. The automatic cutting biopsy needle comprises a solid needle connecting seat connected with a solid needle, a hollow needle connecting seat connected with a hollow needle and a mounting seat. The hollow needle connecting seat is connected with a third limiting wall through a first spring, and the solid needle connecting seat is connected with a second limiting wall through a second spring. The hollow needle connecting seat is provided with a first limiting part for clamping with the third limiting wall, and the solid needle connecting seat is provided with a second limiting part for clamping with the second limiting wall. Medical staff only need to release the clamping between the second limiting part and the second limiting wall, the elastic force of the second spring is released to realize the ejection of the solid needle, and after the solid needle is completely ejected, the first unlocking part automatically releases the clamping between the first limiting part and the third limiting wall, and the ejection of the hollow needle is realized. The biopsy needle is simple and fast to use, and can reduce the fatigue of medical staff.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic cutting biopsy needle. Background Art

[0002] Currently, during the sampling process of a biopsy needle, medical staff need to use their hands to push the hollow needle to move. The sampling process is relatively cumbersome and the medical staff are relatively tired. Summary of the Invention

[0003] The problem solved by the present invention is how to reduce fatigue of medical staff.

[0004] In order to solve the above problems, the present invention provides an automatic cutting biopsy needle, comprising a solid needle and a hollow needle sleeved with the solid needle, and also comprising a solid needle connecting seat connected to the solid needle, a hollow needle connecting seat connected to the hollow needle, and a mounting seat, wherein the mounting seat comprises a first limiting wall and a second limiting wall at both ends of the mounting seat in the axial direction, and a third limiting wall located between the first limiting wall and the second limiting wall, the hollow needle connecting seat is located between the first limiting wall and the third limiting wall, the solid needle connecting seat is located between the third limiting wall and the second limiting wall, the hollow needle connecting seat and the The solid needle connecting seat is slidably connected to the mounting seat respectively, the hollow needle connecting seat is connected to the third limiting wall by a first spring, and the solid needle connecting seat is connected to the second limiting wall by a second spring; a first limiting portion is provided on the hollow needle connecting seat, and the first limiting portion is used to engage with the third limiting wall, and a second limiting portion is provided on the solid needle connecting seat, and the second limiting portion is used to engage with the second limiting wall; a first unlocking portion is provided on one end of the solid needle connecting seat facing the hollow needle connecting seat, and the second unlocking portion is used to release the engagement between the first limiting portion and the third limiting wall.

[0005] Optionally, the automatic cutting biopsy needle also includes a sleeve, and the mounting seat is installed in the sleeve so that the hollow needle connecting seat and the solid needle connecting seat are located inside the sleeve, and an excitation button is provided at one end of the sleeve close to the second limiting wall, and a second unlocking portion is provided on the side of the excitation button facing the second limiting wall, and the second unlocking portion is used to release the clamping connection between the second limiting portion and the second limiting wall.

[0006] Optionally, the automatic cutting biopsy needle also includes a sliding sleeve, which is slidably connected to the sleeve, and an extension rod is provided on the hollow needle connecting seat, which passes through the first limiting wall and is slidably connected to the first limiting wall. The sliding sleeve is used to press the hollow needle connecting seat through the extension rod to achieve the first limiting part and the third limiting wall being clamped together.

[0007] Optionally, a protrusion is provided on the sliding sleeve, a protrusion is provided on the hollow needle connecting seat, and an extension wall is provided on one end of the solid needle connecting seat facing the hollow needle connecting seat. When the first limiting portion is engaged with the third limiting wall, the protrusion is abutted against the inner wall of the extension wall and expands the extension wall outward so that the extension wall is located on the moving path of the protrusion. The sliding sleeve is used to push the extension wall through the protrusion to achieve the engagement of the second limiting portion with the second limiting wall.

[0008] Optionally, a damping spring is provided at one end of the solid needle connector facing the third limiting wall.

[0009] Optionally, the automatic cutting biopsy needle also includes a sliding switch, which is installed on the side wall of the sleeve and partially extends into the interior of the sleeve to be connected to the excitation button through a connecting piece. The sliding switch is used to slide toward one end of the sleeve close to the first limiting wall so that the excitation button releases the engagement between the second limiting portion and the second limiting wall.

[0010] Optionally, the automatic cutting biopsy needle also includes a sliding switch, which is installed on the side wall of the sleeve and partially extends into the interior of the sleeve to be connected to the excitation button through a connecting piece. The sliding switch is used to slide toward the sleeve to allow the excitation button to release the engagement between the solid needle connecting seat and the second limit groove.

[0011] Optionally, an indicator arrow is provided on the sliding switch, and the indicator arrow is used to point to the sliding sleeve.

[0012] Optionally, the sliding sleeve is connected to the first limiting wall via a sliding sleeve return spring.

[0013] Optionally, a window is provided on the sleeve, and when the solid needle connector is engaged with the second limiting portion, part of the solid needle connector is located in the window.

[0014] Optionally, a buffer ring is provided at one end of the hollow needle connecting seat facing the first limiting wall.

[0015] Compared with the prior art, the automatic cutting biopsy needle of the present invention utilizes a hollow needle connecting seat and a solid needle connecting seat to be slidably connected to the mounting seat respectively, and the mounting seat can guide the movement of the hollow needle connecting seat and the solid needle connecting seat, ensuring that the hollow needle connecting seat and the solid needle connecting seat move in the same direction, thereby ensuring that the hollow needle can accurately cover the collection groove on the solid needle, and utilizes the hollow needle connecting seat to be connected to the third limiting wall through the first spring, and a first limiting part is provided on the hollow needle connecting seat, and the first limiting part is used to engage with the third limiting wall so that the hollow needle connecting seat slides toward the third limiting wall, which can compress the first spring, and maintain the first spring in a stable state of elastic energy storage through the engagement of the first limiting part with the third limiting wall; and utilizes the solid needle connecting seat to be connected to the second limiting wall through the second spring, and the solid needle connecting seat The receiving seat is provided with a second limiting portion, which is used to engage with the second limiting wall, so that the sliding of the solid needle connecting seat toward the second limiting wall can compress the second spring, and the engagement of the second limiting portion with the second limiting wall can keep the second spring in a stable state of elastic energy storage, and then the solid needle connecting seat is connected to the hollow needle connecting seat through a first unlocking portion provided at one end, and the first unlocking portion is used to release the engagement between the first limiting portion and the third limiting wall. In this way, medical staff only need to release the engagement between the second limiting portion and the second limiting wall, and the elastic force of the second spring is released to realize the ejection of the solid needle, and after the solid needle is completely ejected, the first unlocking portion automatically releases the engagement between the first limiting portion and the third limiting wall, and realizes the ejection of the hollow needle, making the use of the biopsy needle simple and quick, and can reduce the fatigue of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the internal structure of the automatic cutting biopsy needle in an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the structure of the excitation button in an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the structure of the excitation button in an embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the overall structure of the automatic cutting biopsy needle in an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the first limiting portion and the second limiting portion in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1-solid needle; 2-hollow needle; 3-solid needle connecting seat; 31-second limiting part; 32-first unlocking part; 33-extended wall; 34-damping spring; 4-hollow needle connecting seat; 41-first limiting part; 42-extended rod; 43-protrusion; 5-mounting seat; 51-first limiting wall; 52-second limiting wall; 53-third limiting wall; 6-sleeve; 7-activation button; 71-second unlocking part; 8-sliding sleeve; 81-protruding block; 9-sliding switch; 10-sliding sleeve return spring; 11-window; 12-buffer ring; 13-first spring; 14-second spring. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0024] In the drawings, the Z-axis represents a vertical position, and the positive direction of the Z-axis (i.e., the direction in which the arrow of the Z-axis points) represents the upper side, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents the lower side; the X-axis represents a horizontal position, and the positive direction of the X-axis (i.e., the direction in which the arrow of the X-axis points) represents the right side, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) represents the left side; the Y-axis represents a front-rear position, and the positive direction of the Y-axis (i.e., the direction in which the arrow of the Y-axis points) represents the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) represents the rear side. It should be noted that the above-mentioned meanings of the Z-axis, the Y-axis and the X-axis are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0025] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0026] COMBINATION Figure 1As shown, the present invention provides an automatic cutting biopsy needle, comprising a solid needle 1 and a hollow needle 2 sleeved with the solid needle 1, and also comprising a solid needle connecting seat 3 connected to the solid needle 1, a hollow needle connecting seat 4 connected to the hollow needle 2, and a mounting seat 5, the mounting seat 5 comprising a first limiting wall 51 and a second limiting wall 52 located at both ends of the axial direction thereof, and a third limiting wall 53 located between the first limiting wall 51 and the second limiting wall 52, the hollow needle connecting seat 4 is located between the first limiting wall 51 and the third limiting wall 53, the solid needle connecting seat 3 is located between the third limiting wall 53 and the second limiting wall 52, the hollow needle connecting seat 4 and the solid needle connecting seat The receiving seat 3 is slidingly connected to the mounting seat 5 respectively, the hollow needle connecting seat 4 is connected to the third limiting wall 53 through the first spring 13, and the solid needle connecting seat 3 is connected to the second limiting wall 52 through the second spring 14; a first limiting portion 41 is provided on the hollow needle connecting seat 4, and the first limiting portion 41 is used to be clamped with the third limiting wall 53, and a second limiting portion 31 is provided on the solid needle connecting seat 3, and the second limiting portion 31 is used to be clamped with the second limiting wall 52; a first unlocking portion 32 is provided on one end of the solid needle connecting seat 3 facing the hollow needle connecting seat 4, and the first unlocking portion 32 is used to release the clamping between the first limiting portion 41 and the third limiting wall 53.

[0027] Specifically, the first limiting wall 51 is located at the front end of the mounting seat 5, the second limiting wall 52 is located at the rear end of the mounting seat 5, and the third limiting wall 53 is located in the middle of the mounting seat 5. The first limiting wall 51 and the third limiting wall 53 are located between the first limiting wall 51 and the third limiting wall 53, and the second limiting wall 52 and the third limiting wall 53 are located between the second limiting wall 52 and the third limiting wall 53. The hollow needle connector 4 is located in the first sliding area and is slidably connected to the mounting seat 5, and the solid needle connector 3 is located in the second sliding area and is slidably connected to the mounting seat 5. The end of the hollow needle connector 4 facing the third limiting wall 53 is provided with a first limiting portion 41, and the first limiting portion 41 can be elastically engaged with the third limiting wall 53, for example, in combination with Figure 5As shown, the first limiting portion 41 includes two parallel elastic arms, one end of the elastic arm is fixed on the hollow needle connecting seat 4, and the other end extends toward the third limiting wall 53 and is provided with a triangular clamping block. The third limiting wall 53 is provided with a bayonet. When the triangular clamping block completely passes through the bayonet, the triangular clamping block is clamped on the buckle. The structure of the second limiting portion 31 and the second limiting wall 52 is consistent with the structure of the first limiting portion 41 and the third limiting wall 53. The first spring 13 is sleeved on the first limiting portion 41, and the first spring 13 is connected between the hollow needle connecting seat 4 and the third limiting wall 53. The second spring 14 is sleeved on the second limiting portion 31, and the second spring 14 is connected between the solid needle connecting seat 3 and the second limiting wall 52. During use, the hollow needle connector 4 is pushed toward the third limiting wall 53, the first spring 13 is compressed, the first limiting portion 41 extends into the bayonet, and is limited by the size of the bayonet, and the two triangular blocks move closer to each other. When the two triangular blocks are completely extended from the bayonet, the two triangular blocks return to their original positions and are clamped on the third limiting wall 53. Then, the solid needle connector 3 is pushed toward the second limiting wall 52, the second spring 14 is compressed, and the second limiting portion 31 extends into the bayonet on the second limiting wall 52 until the second limiting portion 31 is clamped on the second limiting wall 52. At this time, the hollow needle 2 and the solid needle 1 are in a pre-ejection state, and the hollow needle 2 can cover the collection slot on the solid needle 1. After that, the second limiting portion 31 and the second limiting wall 53 are released from the engagement, that is, the two triangular blocks of the second limiting portion 31 are closed, so that under the elastic force of the second spring 14, the solid needle connector 3 slides quickly toward the third limiting wall 53, i.e., the ejection of the solid needle 1 is realized, so that the solid needle 1 extends out from the hollow needle 2 and enters the tissue, and when the solid needle connector 3 and the third limiting wall 53 are abutted, the first unlocking portion 32 on the solid needle connector 3 causes the two triangular blocks on the first limiting portion 41 to be closed, so as to release the engagement between the first limiting portion 41 and the third limiting wall 53, so that under the elastic force of the first spring 13, the hollow needle connector 4 slides quickly toward the first limiting wall 51, i.e., the ejection of the hollow needle 2 is realized, so that the hollow needle 2 covers the collection groove on the solid needle 1 and the solid needle 1 is retracted into the inner hollow needle 2 to realize tissue collection.

[0028] The first limiting portion 41 is provided on the hollow needle connecting seat 4, and the first limiting portion 41 is used to engage with the third limiting wall 53, so that the hollow needle connecting seat 4 slides toward the third limiting wall 53, which can compress the first spring 13 and keep the first spring 13 in a stable state of elastic energy storage through the engagement of the first limiting portion 41 with the third limiting wall 53; and the solid needle connecting seat 3 is connected to the second limiting wall 52 through the second spring 14, and the solid needle connecting seat 3 is provided with a second limiting portion 41. The limiting portion 31 and the second limiting portion 31 are used to engage with the second limiting wall 52, so that the sliding of the solid needle connecting seat 3 toward the second limiting wall 52 can compress the second spring 14, and the engagement of the second limiting portion 31 with the second limiting wall 52 keeps the second spring 14 in a stable state of elastic energy storage, and then the first unlocking portion 32 is set at one end of the solid needle connecting seat 3 toward the hollow needle connecting seat 4. The first unlocking portion 32 is used to release the engagement between the first limiting portion 41 and the third limiting wall 53. In this way, the medical staff only needs to release the engagement between the second limiting portion 31 and the second limiting wall 52, and the elastic force of the second spring 14 is released to realize the ejection of the solid needle 1, and after the solid needle 1 is completely ejected, the first unlocking portion 32 automatically releases the engagement between the first limiting portion 41 and the third limiting wall 53, and realizes the ejection of the hollow needle 2, making the use of the biopsy needle simple and quick, and can reduce the fatigue of the medical staff.

[0029] Optionally, combined Figures 1 to 4 As shown, the automatic cutting biopsy needle also includes a sleeve 6, and the mounting seat 5 is installed in the sleeve 6 so that the hollow needle connecting seat 4 and the solid needle connecting seat 3 are located inside the sleeve 6. An excitation button 7 is provided at one end of the sleeve 6 close to the second limiting wall 52, and a second unlocking portion 71 is provided on the side of the excitation button 7 facing the second limiting wall 52. The second unlocking portion 71 is used to release the clamping between the second limiting portion 31 and the second limiting wall 52.

[0030] Specifically, the excitation button 7 is located at the end of the sleeve 6 facing the negative direction of the Y axis, and is slidably connected to the sleeve 6 through an elastic member, and a second unlocking portion 71 is provided at the end of the excitation button 7 facing the second limiting wall 52. The second unlocking portion 71 has the same structure as the first unlocking portion 32. When the excitation button 7 is pressed, the second unlocking portion 71 moves toward the second limiting portion 31 to release the engagement between the second limiting portion 31 and the second limiting wall 52. Figure 5As shown, the first unlocking portion 32 and the second unlocking portion 71 are both angular groove structures, and two guiding slopes are provided at the notch of the groove structure. Taking the second unlocking portion 71 as an example, when the second unlocking portion 71 is against the second limiting portion 31, the two guiding slopes are in sliding contact with the triangular blocks on the two elastic arms respectively, and as the second unlocking portion 71 moves toward the second limiting portion 31, the two guiding slopes continuously squeeze the two triangular blocks so that the two triangular blocks are close to each other, thereby realizing the two elastic arms approaching each other, so that the two elastic arms can be disengaged from the slots of the second limiting wall 52, thereby realizing the release of the clamping between the second limiting portion 31 and the second limiting wall 52.

[0031] In this way, the mounting seat 5 is installed in the sleeve 6 so that the hollow needle connecting seat 4 and the solid needle connecting seat 3 are located inside the sleeve 6. The sleeve 6 is easy for medical staff to grasp, and an excitation button 7 is provided at one end of the sleeve 6 close to the second limiting wall 52. The excitation button 7 is provided with a second unlocking part 71 on the side facing the second limiting wall 52. The second unlocking part 71 releases the clamping connection between the second limiting part 31 and the second limiting wall 52. In this way, after the medical staff holds the sleeve 6, they can press the excitation button 7 with their fingers to release the clamping connection between the second limiting part 31 and the second limiting wall 52, which is convenient for use.

[0032] Optionally, combined Figures 1 to 4 As shown, the automatic cutting biopsy needle also includes a sliding sleeve 8, which is slidably connected to the sleeve 6. An extension rod 42 is provided on the hollow needle connecting seat 4, and the extension rod 42 passes through the first limiting wall 51 and is slidably connected to the first limiting wall 51. The sliding sleeve 8 is used to press the hollow needle connecting seat 4 through the extension rod 42 to achieve the first limiting portion 41 and the third limiting wall 53 to be clamped.

[0033] Specifically, the sliding sleeve 8 is slidably connected to the sleeve 6, that is, the sliding sleeve 8 is located at the front end of the sleeve 6. The hollow needle connector 4 is provided with an extension rod 42, which extends through the first limiting wall 51 and is slidably connected to the first limiting wall 51. When the sliding sleeve 8 is pressed into the sleeve 6, the sliding sleeve 8 and the extension rod 42 abut against each other, and the extension rod 42 pushes the hollow needle connector 4 toward the third limiting wall 53 until the first limiting portion 41 engages with the third limiting wall 52.

[0034] In this way, the sliding sleeve 8 is slidably connected to the sleeve 6, and an extension rod 42 is provided on the hollow needle connecting seat 4. The extension rod 42 passes through the first limiting wall 51 and is slidably connected to the first limiting wall 51. The sliding sleeve 8 is used to press the hollow needle connecting seat 4 through the extension rod 42 to achieve the clamping connection between the first limiting portion 41 and the third limiting wall 53. In this way, medical staff can achieve the clamping connection between the hollow needle connecting seat 4 and the third limiting wall 53 by pressing the sliding sleeve 8, thereby improving the use efficiency.

[0035] Optionally, combined Figure 1 As shown, a protrusion 81 is provided on the sliding sleeve 8, a protrusion 43 is provided on the hollow needle connecting seat 4, and an extension wall 33 is provided on one end of the solid needle connecting seat 3 facing the hollow needle connecting seat 4. When the first limiting portion 41 is engaged with the third limiting wall 53, the protrusion 43 is abutted against the inner wall of the extension wall 33 and expands the extension wall 33 outward so that the extension wall 33 is located on the moving path of the protrusion 81. The sliding sleeve 8 is used to push the extension wall 33 through the protrusion 81 to realize the engagement of the second limiting portion 31 with the second limiting wall 52.

[0036] Specifically, during the movement of the hollow needle connector 4, the protrusion 43 pushes the extension wall 33 toward the sleeve 6, causing the extension wall 33 to expand outward. After the first limiting portion 41 is engaged with the third limiting wall 52, the extension wall 33 is maintained, and the sliding sleeve 8 is restored. Then, the sliding sleeve 8 is pressed again, and the protrusion 81 on the sliding sleeve 8 is against the extension wall 33, so as to push the solid needle connector 3 toward the second limiting wall 52 through the extension wall 33 until it is engaged with the second limiting wall 52. When unlocking, the excitation button 7 is pressed, the second spring 14 is extended, and the solid needle connector 3 pops out the solid needle 1. The first unlocking portion 32 on the solid needle connector 3 releases the engagement between the hollow needle connector 4 and the third limiting wall 53, the first spring 13 is extended, and the hollow needle connector 4 pops out the hollow needle 2.

[0037] In this way, an extension wall 33 is provided at one end of the solid needle connecting seat 3 toward the hollow needle connecting seat 4. When the first limiting portion 41 is engaged with the third limiting wall 53, the protrusion 43 abuts against the inner wall of the extension wall 33 and expands the extension wall 33 outward, so that the extension wall 33 is located on the moving path of the protrusion 81, so that the sliding of the sliding sleeve 8 toward the third limiting wall 53 can be converted into an outward expansion movement of the extension wall 33 through the protrusion 43, and then the sliding sleeve 8 can push the extension wall 33 through the protrusion 81 to realize the pushing of the solid needle connecting seat 3, thereby realizing the engagement of the second limiting portion 31 with the second limiting wall 52. In this way, medical staff can realize the engagement of the hollow needle connecting seat 4 with the third limiting wall 53 and the engagement of the solid needle connecting seat 3 with the second limiting wall 52 by pressing the sliding sleeve 8 twice, thereby improving the use efficiency.

[0038] Optionally, combined Figure 1 As shown, a damping spring 34 is provided at one end of the solid needle connecting seat 3 facing the third limiting wall 53 .

[0039] Specifically, the axis of the damping spring 34 is consistent with the moving direction of the solid needle connector 3 , and one end of the damping spring 34 is fixed to one end of the solid needle connector 3 facing the third limiting wall 53 .

[0040] In this way, a shock-absorbing spring 34 is provided at one end of the solid needle connecting seat 3 facing the third limiting wall 53. The shock-absorbing spring 34 can increase the flexibility of the solid needle connecting seat 3 when it contacts the third limiting wall 53. In this way, the impact of the solid needle connecting seat 3 on the third limiting wall 53 can be reduced, thereby improving the stability of use.

[0041] It is understandable that the elastic force of the damping spring 34 has a negligible effect on the recovery of the solid needle connector 3 , and only reduces the impact of the solid needle connector 3 on the third limiting wall 53 , and will not cause the solid needle connector 3 to rebound repeatedly.

[0042] Optionally, combined Figures 1 to 4 As shown, the automatic biopsy needle also includes a sliding switch 9, which is installed on the side wall of the sleeve 6 and partially extends into the interior of the sleeve 6 to be connected to the excitation button 7 through a connecting piece. The sliding switch 9 is used to slide toward the end of the sleeve 6 close to the first limiting wall 51 to release the excitation button 7 from the engagement between the second limiting portion 31 and the second limiting wall 52.

[0043] Specifically, the sliding switch 9 is slidably installed on the side wall of the sleeve 6, the lower end part of the sliding switch 9 extends into the interior of the sleeve 6, and is connected to the excitation button 7 through a connecting piece. The sliding switch 9 slides toward the sliding sleeve 8, so that the excitation button 7 moves toward the solid needle connecting seat 3, so as to release the clamping between the solid needle connecting seat 3 and the second limiting wall 52 through the second unlocking part 71 on the excitation button 7.

[0044] In this way, the sliding switch 9 is installed on the side wall of the sleeve 6 and partially extends into the interior of the sleeve 6 to be connected to the trigger button 7 through a connecting piece. The sliding switch 9 is used to slide toward the sliding sleeve 8 to release the trigger button 7 from the engagement between the second limiting portion 31 and the second limiting wall 52. In this way, medical staff can choose to push the sliding switch 9 or directly press the trigger button 7 according to their habits to release the engagement between the solid needle connecting seat 3 and the second limiting wall 52, thereby improving the flexibility of using the automatic cutting biopsy needle.

[0045] Optionally, combined Figure 4 As shown, an indicator arrow is provided on the slide switch 9, and the indicator arrow is used to point to the setting of the slide sleeve 8. In this way, the indicator arrow can be used to remind medical staff to slide the slide switch 9 along the direction of the indicator arrow to release the clamping connection between the solid needle connecting seat 3 and the second limiting wall 52, which is convenient and quick.

[0046] Optionally, combined Figure 1 As shown, the sliding sleeve 8 is connected to the first limiting wall 51 via a sliding sleeve return spring 10 .

[0047] Specifically, both ends of the sliding sleeve return spring 10 in the length direction are fixedly connected to the sliding sleeve 8 and the first limiting wall 51 respectively.

[0048] In this way, by connecting the sliding sleeve 8 to the first limiting wall 51 through the sliding sleeve return spring 10, the return efficiency of the sliding sleeve 8 can be improved, thereby reducing the workload of medical staff and saving time and effort.

[0049] Optionally, combined Figure 3 As shown, a window 11 is provided on the sleeve 6. When the solid needle connector 3 is engaged with the second stopper 31, part of the solid needle connector 3 is located within the window 11. This allows medical personnel to easily determine whether the solid needle connector 3 and the second stopper 31 are engaged through the window 11, thereby improving the reliability of the automatic cutting biopsy needle.

[0050] Optionally, combined Figure 1 As shown, a buffer ring 12 is provided at one end of the hollow needle connecting seat 4 facing the first limiting wall 51 .

[0051] Specifically, the end of the hollow needle connector 4 facing the first limiting wall 51 is the end of the hollow needle connector 4 facing the positive direction of the Y axis. The buffer ring 12 can be understood as a rubber ring. The rubber ring is put on the extension rod 42 and fixed on the hollow needle connector 4.

[0052] In this way, by setting the buffer ring 12 at one end of the hollow needle connecting seat 4 facing the first limiting wall 51, the buffer ring 12 increases the flexibility of the hollow needle connecting seat 4 when it contacts the first limiting wall 51 under the action of the elastic force of the first spring 13. In this way, when the hollow needle connecting seat 4 contacts the first limiting wall 51, the impact on the first limiting wall 51 can be reduced, and the vibration can be reduced, so as to improve the stability of the use of the automatic cutting biopsy needle.

[0053] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An automatic cutting biopsy needle, comprising a solid needle (1) and a hollow needle (2) sleeved with the solid needle (1), characterized in that: The invention also includes a solid needle connecting seat (3) connected to the solid needle (1), a hollow needle connecting seat (4) connected to the hollow needle (2), and a mounting seat (5), wherein the mounting seat (5) includes a first limiting wall (51) and a second limiting wall (52) located at both ends of the mounting seat in the axial direction, and a third limiting wall (53) located between the first limiting wall (51) and the second limiting wall (52), the hollow needle connecting seat (4) is located between the first limiting wall (51) and the third limiting wall (53), the solid needle connecting seat (3) is located between the third limiting wall (53) and the second limiting wall (52), the hollow needle connecting seat (4) and the solid needle connecting seat (3) are respectively connected to the mounting seat (5) in a sliding manner, and the hollow needle The connecting seat (4) is connected to the third limiting wall (53) through a first spring (13), and the solid needle connecting seat (3) is connected to the second limiting wall (52) through a second spring (14); a first limiting portion (41) is provided on the hollow needle connecting seat (4), and the first limiting portion (41) is used to engage with the third limiting wall (53); a second limiting portion (31) is provided on the solid needle connecting seat (3), and the second limiting portion (31) is used to engage with the second limiting wall (52); a first unlocking portion (32) is provided on one end of the solid needle connecting seat (3) facing the hollow needle connecting seat (4), and the first unlocking portion (32) is used to release the engagement between the first limiting portion (41) and the third limiting wall (53).

2. The automatic cutting biopsy needle according to claim 1, characterized in that: It also includes a sleeve (6), the mounting seat (5) is installed in the sleeve (6), so that the hollow needle connecting seat (4) and the solid needle connecting seat (3) are located inside the sleeve (6), and an excitation button (7) is provided at one end of the sleeve (6) close to the second limiting wall (52), and a second unlocking portion (71) is provided on the side of the excitation button (7) facing the second limiting wall (52), and the second unlocking portion (71) is used to release the clamping between the second limiting portion (31) and the second limiting wall (52).

3. The automatic cutting biopsy needle according to claim 2, characterized in that: The hollow needle connecting seat (4) further comprises a sliding sleeve (8), wherein the sliding sleeve (8) is slidably connected to the sleeve (6); an extension rod (42) is provided on the hollow needle connecting seat (4); the extension rod (42) passes through the first limiting wall (51) and is slidably connected to the first limiting wall (51); the sliding sleeve (8) is used to press the hollow needle connecting seat (4) through the extension rod (42) to achieve the first limiting portion (41) and the third limiting wall (53) being engaged.

4. The automatic cutting biopsy needle according to claim 3, characterized in that: The sliding sleeve (8) is provided with a protrusion (81), the hollow needle connecting seat (4) is provided with a protrusion (43), and the solid needle connecting seat (3) is provided with an extension wall (33) at one end facing the hollow needle connecting seat (4). When the first limiting portion (41) is engaged with the third limiting wall (53), the protrusion (43) abuts against the inner wall of the extension wall (33) and expands the extension wall (33) outward, so that the extension wall (33) is located on the moving path of the protrusion (81). The sliding sleeve (8) is used to push the extension wall (33) through the protrusion (81) to achieve the engagement of the second limiting portion (31) with the second limiting wall (52).

5. The automatic cutting biopsy needle according to claim 1, characterized in that: A damping spring (34) is provided at one end of the solid needle connecting seat (3) facing the third limiting wall (53).

6. The automatic cutting biopsy needle according to claim 3, characterized in that: It also includes a sliding switch (9), which is installed on the side wall of the sleeve (6) and partially extends into the interior of the sleeve (6) to be connected to the excitation button (7) through a connecting piece. The sliding switch (9) is used to slide toward one end of the sleeve (6) close to the first limiting wall (51) to enable the excitation button (7) to release the engagement between the second limiting portion (31) and the second limiting wall (52).

7. The automatic cutting biopsy needle according to claim 6, characterized in that: The sliding switch (9) is provided with an indicator arrow, and the indicator arrow is used to point to the sliding sleeve (8).

8. The automatic cutting biopsy needle according to claim 3, characterized in that: The sliding sleeve (8) is connected to the first limiting wall (51) via a sliding sleeve return spring (10).

9. The automatic cutting biopsy needle according to claim 2, characterized in that: A window (11) is provided on the sleeve (6), and when the solid needle connector (3) is engaged with the second limiting portion (31), a portion of the solid needle connector (3) is located within the window (11).

10. The automatic cutting biopsy needle according to claim 1, characterized in that: A buffer ring (12) is provided at one end of the hollow needle connecting seat (4) facing the first limiting wall (51).

Images