Gear block for electric tube cutting needle and electric tube cutting needle

Abstract

The application discloses a kind of electric tube cutting needle's tuning block and electric tube cutting needle, further improve existing electric tube cutting needle.The electric tube cutting needle's tuning block of the present application includes stop hook, bottom plate, sliding slot and second push button, wherein the stop hook includes first arm, second arm, third arm, fourth arm and connecting part;The bottom plate is connected with the bottom of sliding slot and the two are coplanar;Second push button is installed on the lower surface of bottom plate;First arm and second arm are connected into L shape, second arm is connected with the top edge of the first wall of sliding slot and second arm is consistent with the extension direction of the first wall;Third arm and fourth arm are connected into L shape, fourth arm is connected with the top edge of the second wall of sliding slot and second arm is consistent with the extension direction of the second wall;Connecting part, first arm and third arm form U shape.The electric tube cutting needle contains the tuning block, and the tuning block is not easy to be damaged during the use of the electric tube cutting needle.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an adjustment block for an electric tube cutting needle and the electric tube cutting needle itself. Background Technology

[0002] A biopsy is the primary method for obtaining histopathological diagnosis of bone and soft tissue tumors. The biopsy needle is typically used under ultrasound guidance, in conjunction with a biopsy frame. Ultrasound imaging serves as a visual guide, helping the surgeon insert the biopsy needle near the tumor tissue to be sampled, then activating the needle to extract tissue from the tumor. The biopsy frame helps the surgeon keep the biopsy needle within the ultrasound plane, ensuring it remains a linear image on the ultrasound screen. Biopsy procedures are divided into lateral incision and cannulation. Cannulation involves directly cutting and removing the tissue inside the needle; compared to lateral incision biopsy needles, cannulation needles can obtain more abundant tissue samples.

[0003] The biopsy needle for cannulation includes an inner needle, an outer needle, and a cutting needle, which are coaxially arranged from the inside out. The principle of cannulation biopsy is as follows: 1. The tip of the inner needle pierces the tissue; 2. The outer needle and the cutting needle are activated, with the tip of the outer needle in front and the tip of the cutting needle behind. The outer needle extends beyond the tip of the inner needle and cuts into the tissue through the cutting edge, at which point the tissue enters the outer needle; 3. After the outer needle stops, the cutting needle continues to move forward. A flexible cutting blade on the tip of the cutting needle extends into the outer needle through a through hole near the tip, cutting the tissue inside the outer needle; 4. Finally, the inner needle, outer needle, and cutting needle of the cannulation biopsy are withdrawn from the body, the cutting needle is removed, and the tissue inside the outer needle is pushed out through the inner needle.

[0004] In the process of realizing this invention, the inventors discovered that in the prior art, the electric tube cutting needle will suffer some damage to the adjustment block due to repeated impacts after a certain period of use. Continued use may result in damage and malfunction of the adjustment block. Summary of the Invention

[0005] This invention proposes an adjustment block for an electric tube cutter and an electric tube cutter, which further improves upon the existing electric tube cutter technology, making the adjustment block have better strength and less prone to breakage during use.

[0006] The present invention adopts the following technical solution:

[0007] An adjusting block for an electric tube cutting needle includes a stop hook, a base plate, a slide groove, and a second push button. The stop hook includes a first arm, a second arm, a third arm, a fourth arm, and a connecting portion. The base plate is connected to the bottom of the slide groove and the two are coplanar. The second push button is mounted on the lower surface of the base plate, and the pressing direction of the second push button is consistent with the extending direction of the first and third arms. The first and second arms are connected in an L-shape, with the second arm connected to the top edge of the first wall of the slide groove and extending in the same direction as the first wall. The third and fourth arms are connected in an L-shape, with the fourth arm connected to the top edge of the second wall of the slide groove and extending in the same direction as the second wall. The two ends of the connecting portion are respectively connected to the connection points of the first and second arms and the third and fourth arms, thereby forming a U-shape with the connecting portion, the first arm, and the third arm extending away from the base plate.

[0008] Optionally, it also includes a groove for accommodating the movement of the cutting needle seat; the groove is provided with a groove stop block, which is adjacent to one end of the groove located inside the groove, so that the side of the groove stop block facing the groove inlet is used to receive the impact of the cutting needle seat during movement.

[0009] Optionally, a first protrusion is provided at the connection between the first arm and the second arm, and a second protrusion is provided at the connection between the third arm and the fourth arm; both the first protrusion and the second protrusion protrude toward the bottom plate.

[0010] Optionally, the outer sides of the first and second walls of the chute are provided with wall grooves, the extension direction of which is perpendicular to the bottom of the chute.

[0011] Optionally, the thickness of the first and second walls of the chute is 4 to 6 times the thickness of the bottom of the chute.

[0012] An electric tube cutter, wherein the adjusting block of the electric tube cutter is the adjusting block described in this invention.

[0013] According to the technical solution of the present invention, the stop hook has a U-shaped structure, thus forming a single unit, enhancing stability and making it more resistant to impact. Adding a stop block inside the slide groove helps improve the slide groove's impact resistance. Grooves on the outer sides of both walls of the slide groove allow for lateral deformation, preventing breakage upon impact. The impact resistance of the stop block is an important aspect of the electric tube cutter design; the above measures significantly improve the overall reliability of the electric tube cutter. Attached Figure Description

[0014] For illustrative and not limiting purposes, the invention will now be described with reference to preferred embodiments thereof, particularly the accompanying drawings, in which:

[0015] Figure 1A and Figure 1B This is a schematic diagram of the first external structure of the electric tube cutting needle according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the housing of the electric tube cutting needle according to an embodiment of the present invention, located on one side of the housing.

[0017] Figure 3 This is a schematic diagram of the internal structure of the housing of the electric tube cutting needle according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the motor drive mechanism of the electric tube cutting needle according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the metal-coated lead screw structure according to an embodiment of the present invention;

[0020] Figure 6 This is an exploded view of the lead screw metal-coated structure according to an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the assembly of the upper chord slider, the cutting needle seat, and the adjusting block according to an embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the electric tube cutting needle starting to be wound up according to an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the electric tube cutting needle completing its chordation according to an embodiment of the present invention;

[0024] Figure 10 This is an exploded view of the assembly of the upper chord slider, the cutting needle seat, and the adjusting block according to an embodiment of the present invention.

[0025] Figure 11 This is an exploded view from another perspective of the assembly of the upper chord slider, the cutting needle seat, and the adjusting block according to an embodiment of the present invention.

[0026] Figure 12 This is an exploded view of the assembly of the upper chord slider, the cutting needle seat, the trigger linkage, and the adjusting block according to an embodiment of the present invention.

[0027] Figure 13 yes Figure 12 Back view;

[0028] Figure 14 This is a schematic diagram of the trigger linkage according to an embodiment of the present invention;

[0029] Figure 15 This is a schematic diagram of the electric tube cutting needle after activation according to an embodiment of the present invention;

[0030] Figure 16 This is a schematic diagram of the first structure of the gear shifting block according to an embodiment of the present invention;

[0031] Figure 17 This is a schematic diagram of the structure of the upper chord slider, the cutting needle seat, and the outer needle seat located on the slide rail according to an embodiment of the present invention.

[0032] Figure 18 This is a schematic diagram of the slide rail on the housing according to an embodiment of the present invention;

[0033] Figure 19 This is a structural schematic diagram of the slide rail on the housing from another perspective in an embodiment of the present invention;

[0034] Figure 20 This is a diagram showing the position of the cut needle hub and the outer needle hub after activation;

[0035] Figure 21 This is a diagram showing the positions of the needle seat and outer needle seat after the needle is wound up;

[0036] Figure 22 This is a schematic diagram of the connection between the gear shift block and the housing;

[0037] Figure 23 This is a schematic diagram of the structure of the part on the housing that connects to the adjustment block;

[0038] Figure 24 This is a structural schematic diagram of the gear shift block from another perspective;

[0039] Figure 25 This is a top view of the connection between the adjustment block and the outer needle seat;

[0040] Figure 26 This is a 3D view of the connection between the adjustment block and the outer needle seat;

[0041] Figure 27 This is a three-dimensional view of the connection between the adjustment block and the outer needle seat from another perspective;

[0042] Figure 28 This is a schematic diagram of the second external structure of the electric tube cutting needle according to an embodiment of the present invention;

[0043] Figure 29 This is a side view schematic diagram of a second external structure of the electric tube cutting needle according to an embodiment of the present invention;

[0044] Figure 30 yes Figure 28 A cross-sectional view of the electric tube cutter shown;

[0045] Figure 31 This is a schematic diagram of the second structure of the gear shifting block in an embodiment of the present invention.

[0046] In the picture:

[0047] 01. Lighting lamp; 011. Lamp tube; 012. Lamp bead; 02. Power switch; 021. Main body; 022. Toggle block; 1. Upper winding slider; 2. Cut-off needle seat; 3. Adjustment block; 4. Outer needle seat; 5. Trigger linkage; 6. Lead screw; 7. Motor; 8. Upper housing; 9. Lower housing; 10. Circuit board; 11. First protrusion; 12. Connecting hole; 13. First longitudinal groove; 14. Circular tubular structure; 15. Downward pressing slope Surface; 16. Bottom edge; 21. Second protrusion; 211. Unlocking ramp; 22. Second longitudinal groove; 23. Cutting needle seat hook; 24. Extension; 31. Baffle; 311. Adjusting block hook; 32. Slide groove; 33. Stop hook; 331. Stop hook ramp; 332. Stop hook top surface; 34. Pressing part; 35. Connecting wall; 36. Second push button; 37. Notch; 38. Trapezoidal protrusion; 39. Adjusting block protrusion; 4 0. Groove; 41. Rounded corner; 42. Rectangular boss; 51. Trigger button; 52. First push button; 61. Plastic lead screw; 62. Metal shaft; 71. Rotating shaft; 81. Battery; 82. Indicator light; 83. Winding button; 84. Display hole; 85. Spring; 86. First rail; 87. Second rail; 88. First bearing; 89. Second bearing; 90. Inner pin seat; 91. Front contact switch; 92. Rear connector 93. Touch switch; 94. Indicator window; 95. Through hole; 96. Trapezoidal slot; 033. Stop hook; 1331. First arm; 1332. Second arm; 2331. Third arm; 2332. Fourth arm; 0330. Connecting part; 320. Base plate; 321. Slide stop block; 3103. Bottom of slide; 3101. First wall; 3102. Second wall; 301. Wall groove; 1333. First protrusion. Detailed Implementation

[0048] In this embodiment of the invention, the adjusting block of the electric tube cutting needle in the prior art is improved to enhance its strength. A detailed description follows.

[0049] Figure 1A and Figure 1B This is a schematic diagram of the first external structure of the electric tube cutting needle according to an embodiment of the present invention; as shown. Figure 1A and Figure 1B As shown, the electric tube cutting needle includes an upper housing 8 and a lower housing 9, as well as a puncture biopsy needle assembly (including an inner needle, an outer needle, and a cutting needle); the housing is provided with a trigger button 51 and a first push button 52 for activating the puncture needle, and a second push button 36 for adjusting the activation level of the puncture needle; the mating surfaces of the upper housing 8 and the lower housing 9 are provided with a display hole 84 and a winding button 83 for winding.

[0050] Figure 2This is an overall internal layout diagram of the electric tube cutting needle according to an embodiment of the present invention. The electric tube cutting needle includes a motor drive mechanism, a winding mechanism, an excitation mechanism, etc.; the motor drive mechanism, the winding mechanism, and the excitation mechanism are all located inside the housing. Figure 2 The lower housing 9 is visible, while the upper housing is omitted. The motor drive mechanism includes a motor 7, a lead screw 6, a front contact switch 91, a rear contact switch 92, a battery 81, a winding button 83, and an indicator light 82. A display hole 84 is located on the housing outside the indicator light 82. The winding and actuation mechanism includes a winding slider 1, a cutting needle seat 2, an outer needle seat 4, an adjusting block 3, an inner needle seat 90, and a spring 85. The spring 85 is disposed between the outer needle seat 4 and the inner needle seat 90, and the inner needle seat 90 is fixed to the housing. The motor drive mechanism drives the winding and actuation mechanism to achieve winding, actuation, and reset functions. The technical solution of the embodiments of the present invention will be described in detail below.

[0051] Figure 3 , Figure 4 The internal structure of the electric tube cutter according to an embodiment of the present invention is shown; Figure 3 and Figure 4 The illustrations are presented from different angles, and for clarity, Figure 4 The trigger linkage 5 is omitted. In this embodiment of the invention, the electric tube cutting needle is driven by a motor, making operation more labor-saving. The motor 7 of the motor drive mechanism drives the lead screw 6, which passes through a threaded hole on the inner surface of the cylindrical structure 14 on the side of the upper chord slider 1 away from the cutting needle seat 2. This allows the upper chord slider 1 to slide back and forth along a track located inside the housing, with the sliding direction parallel to the needle insertion direction during puncture. Figure 3 and Figure 4 Two upper-curved sliders 1 are shown, representing the positions of their two sliding endpoints. The actual structure remains the same. Figure 2 As shown, there is only one upper-curved slider 1.

[0052] The upper slider 1 drives the cutting needle seat 2 of the electric tube cutting needle to move, and the cutting needle seat 2 can push the outer needle seat 4 when it moves.

[0053] The cutting needle holder 2, the winding slider 1, and the circuit board 10 are arranged side by side perpendicular to the needle insertion direction. A front contact switch 91 and a rear contact switch 92 are provided on the side of the circuit board 10 near the winding slider 1. When the winding slider 1 moves back and forth, the first protrusion 11 on the cylindrical structure 14 touches the front contact switch 91 and the rear contact switch 92 respectively, causing these two switches to activate. The circuit board 10 is provided with a winding button 83 and an indicator light 82. The indicator light 82 is used to display the working status of the battery 81 or its connection status with the power source. Figure 2 As shown, the wind-up button 83 extends from the housing. The motor 7 is connected to the battery 81, and the motor 7 can also be connected to an external low-voltage DC power supply.

[0054] The function of the front contact switch 91 and the rear contact switch 92 is to determine the position of the upper spool slider 1. Other position sensing components can also be used for the contact switches.

[0055] In this embodiment of the invention, for example, when the upper winding slider 1 is in the initial position, the first protrusion 11 abuts against the rear contact switch 92. When the upper winding button 83 is pressed, the motor 7 rotates, thereby driving the lead screw 6 to rotate and pushing the upper winding slider 1 forward (this is the reset process). After the first protrusion 11 on the surface of the upper winding slider 1 touches the front contact switch 91, the motor 7 rotates in the opposite direction, pushing the upper winding slider 1 backward through the transmission of the lead screw 6 (this is the winding process) until the first protrusion 11 touches the rear contact switch 92 and the motor 7 stops. The actions generated by the front contact switch 91 and the rear contact switch 92 cause the motor 7 to run, thereby moving the upper winding slider 1 back and forth, thus realizing the reset winding action.

[0056] In this embodiment of the invention, before the upper winding button 83 is pressed and the upper winding slider 1 moves from back to front to reset, the cutting needle seat 2 and the outer needle seat 4 have been reset after being activated by the spring force; when winding, the upper winding slider 1 is engaged with the cutting needle seat 2, and the upper winding slider 1 drives the cutting needle seat 2 to move backward; the position setting of the front contact switch 91 enables the upper winding slider 1 to move to the reset position.

[0057] Figure 4 The display shows two states of the winding slider 1: the first state is when the winding slider 1 is in the rear position, and the second state is when it is in the front position. Pressing the winding button 83 causes the winding slider 1 to change from the first state to the second state and then back to the first state, before waiting for the activation operation.

[0058] like Figure 5 , Figure 6 As shown, the lead screw 6 includes a hollow plastic lead screw 61 and a metal shaft 62 filled in the middle of the plastic lead screw 61. The metal shaft 62 is used to increase strength.

[0059] The metal shaft 62 extends from the first end of the plastic lead screw 61, and the extended end is provided with a first bearing 88 fixedly mounted on the housing. The second end of the plastic lead screw 61 is sleeved on the rotating shaft 71 of the motor 7, and the second end of the lead screw 6 is provided with a second bearing 89 fixedly mounted on the housing. The second bearing 89 can also be mounted on the rotating shaft 71 of the motor 7. The lead screw 6 is rotatably mounted on the housing through two bearings, thereby ensuring accuracy.

[0060] Alternatively, a bearing can be installed separately at the end of the lead screw away from the motor, without a bearing at the end connected to the motor. However, in this case, the force on the end of the lead screw closest to the motor is borne entirely by the motor, which will affect the coaxiality of the lead screw.

[0061] In this embodiment of the invention, bearings are respectively mounted on a metal shaft away from the motor end and on the motor shaft, which enables the connection between the metal shaft and the bearing.

[0062] The following description, in conjunction with the accompanying drawings, further explains the winding and firing mechanisms. The first step in the winding and firing reset operation is winding; please refer to [the accompanying drawings]. Figure 7 , Figure 8 , Figure 9 , Figure 7 This is a schematic diagram of the assembly of the upper sliding block 1, the cutting needle seat 2, and the adjusting block 3 according to an embodiment of the present invention. Figure 7 In the middle, the upper slider 1 drives the cutting needle seat 2 and the adjusting block 3 to connect together. Figure 7 Two upper-curved sliders, 1 and 2, are visible in the image. Figure 3 , Figure 4 Similarly, it represents two positions of an upper-curved slider 1; Figure 8 This is the state when the needle is first wound. When winding, except for the adjustment block 3, the winding slider 1, the cutting needle seat 2, and the outer needle seat 4 move together in the opposite direction of the needle insertion direction. Figure 9 It is the state when the upper part of the string is fully wound.

[0063] Please see Figure 10 , Figure 11 , Figure 10 , Figure 11 This is an exploded view from different perspectives of the assembly of the upper winding slider 1, the cutting needle seat 2, and the adjusting block 3 according to an embodiment of the present invention. The upper winding slider 1 and the cutting needle seat 2 are connected by a snap-fit ​​mechanism. The front end of the connecting surface between the cutting needle seat 2 and the upper winding slider 1 is provided with a second protrusion 21, and the upper winding slider 1 is provided with a corresponding connecting hole 12. The second protrusion 21 extends into the connecting hole 12 to achieve the snap-fit. The upper winding slider 1 drives the cutting needle seat 2 to move in the opposite direction of the needle insertion direction. The connecting hole 12 can be a through hole or a blind hole. Figure 10 The center is a through hole; Figure 10 In the middle, the front side of the second protrusion 21 is a vertical surface, and the rear side is an inclined surface that slopes outward. The inclined surface is the unlocking slope 211.

[0064] After the connecting hole 12 on the upper chord slider 1 hooks onto the second protrusion 21 on the cutting needle seat 2, it moves in the opposite direction to the needle insertion direction. Figures 7 to 9 The needle holder 2 and the outer needle holder 4 are cut off and then slide together in the opposite direction of the needle insertion direction. The spring 85 between the outer needle holder 4 and the inner needle holder 90 is compressed and stored. When the upper winding slider 1 moves to the designated position, it locks itself and completes the winding action.

[0065] The second step in the operation is activation. Figure 12 , Figure 13 The position of trigger link 5 is given in the text. Figure 14 This is a schematic diagram of the trigger linkage according to an embodiment of the present invention. Figure 12In the middle, the trigger linkage 5 moves in the needle insertion direction, and its end moves along the slope-shaped surface of the unlocking ramp 211, pushing open the upper string slider 1 and the cutting needle seat 2.

[0066] Combination Figure 11 , Figure 11 The upper and middle chord slider 1 is provided with a first longitudinal groove 13 at the connection between it and the cutting needle seat 2. Figure 10 , Figure 10 The middle right side of the unlocking inclined surface 211 on the cutting needle seat 2 is provided with a second longitudinal groove 22, and one end of the needle insertion direction of the trigger link 5 is located in the second longitudinal groove 22; the first longitudinal groove 13 is arranged opposite to the second longitudinal groove 22, and the groove wall of the second longitudinal groove 22 is located inside the first longitudinal groove 13. Figure 12 In the initial state, the front end of the trigger link 5 is located at the rear end of the second longitudinal groove 22, at a certain distance from the second protrusion 21. Referring to Figure 1, pressing the trigger button 51 at the rear end of the trigger link 5 or pushing the first push button 52 connected to the trigger link 5 in the middle of the housing causes the trigger link 5 to be pushed in the needle insertion direction. Through the unlocking inclined surface 211, the connecting hole 12 on the upper string slider 1 is disengaged from the second protrusion 21 on the cutting needle seat 2. After the spring 85 between the outer needle seat 4 and the inner needle seat 90 is released, it pushes the outer needle seat 4 and the cutting needle seat 2 to move together in the needle insertion direction. At this time, the outer needle and the cutting needle move in the needle insertion direction at the same time. Under biopsy conditions, the outer needle extends out of the inner needle tip and cuts into the tissue through the cutting edge, and the tissue enters the outer needle. The outer needle seat 4 moves in the needle insertion direction and stops after impacting the rear side of the adjusting block 3. After the outer needle seat 4 stops, the cutting needle seat 2 continues to move in the needle insertion direction for a distance due to inertia, and stops after impacting the adjusting block 3. At the same time, it is locked by the locking hook structure between the two (the locking hook structure includes the cutting needle seat locking hook 23 and the adjusting block locking hook 311). At this time, a flexible cutting disc on the tip of the cutting needle extends into the outer needle from a through hole near the tip, cutting the tissue inside the outer needle.

[0067] The state of the electric tube cutting needle after excitation is as follows Figure 15 As shown; Figure 15 In the middle, the adjusting block 3 is sleeved at the bottom of the cutting needle seat 2 and the outer needle seat 4; combined with Figure 16 The top left and right sides of the adjustment block 3 are respectively provided with baffles 31 parallel to the needle insertion direction, and the baffles 31 are connected by a groove 32. Figure 15In the middle, the bottom of the cutting needle seat 2 and the outer needle seat 4 are provided with corresponding rectangular bosses, which can move within the slide groove 32; the bottom front end of the upper stringer slide block 1 is provided with a downward pressing slope 15, and the front end of the baffle wall 31 of the adjusting block 3 is bent upward to form a blocking hook 33 perpendicular to the needle insertion direction. The end of the blocking hook 33 away from the needle insertion direction is provided with a blocking hook slope 331 corresponding to the downward pressing slope 15; the baffle wall 31 near the blocking hook 33 is provided with an upwardly extending adjusting block locking hook 311. The side of the needle insertion direction of 311 is a vertical surface, and the other side of the adjusting block locking hook 311 is an outward inclined surface. The corresponding position on the cutting needle seat 2 is provided with a cutting needle seat locking hook 23 extending towards the adjusting block 3. The side of the cutting needle seat locking hook 23 on the needle insertion direction is an outward inclined surface, and the other side is a vertical surface. Before the blocking hook 33 is pressed down, the cutting needle seat locking hook 23 and the adjusting block locking hook 311 are located on a straight line parallel to the needle insertion direction, so that the two hook each other.

[0068] Figure 15 In the middle, the upper winding slider 1 moves in the needle-feeding direction, and the lower pressing inclined surface 15 of the upper winding slider 1 moves the adjusting block 3 away from the upper winding slider 1 (i.e., Figure 15 (Below) Press down, the adjusting block locking hook 311 and the cutting needle seat locking hook 23 disengage from each other, forming a... Figure 8 The state shown; and when the upper winding slider 1 continues to move in the needle insertion direction, the locking hook between the cutting needle seat 2 and the adjusting block 3 remains in the disengaged state; when the upper winding slider 1 continues to move in the needle insertion direction to the front contact switch 91, the upper winding action is repeated: the connecting hole 12 on the upper winding slider 1 hooks the second protrusion 21 on the cutting needle seat 2 and moves in the opposite direction of the needle insertion direction. At this time, the cutting piece disengages from the through hole near the needle tip of the outer needle. The cutting needle seat 2 moves to abut against the outer needle seat 4 and slides together in the opposite direction of the needle insertion direction. The spring 85 between the outer needle seat 4 and the inner needle seat 90 is compressed and stored. At this time, the inner needle extends out from the outer needle. If tissue is taken from the outer needle, the inner needle will push out the taken tissue.

[0069] It should be noted that, Figure 2-4 as well as Figure 7 In the middle, the states of the adjusting block locking hook 311, the cutting needle seat locking hook 23, the downward pressing slope 15, and the blocking hook slope 331 should be as follows: Figure 8 In the state shown, the top surface 332 of the stop hook 33 abuts against the bottom edge 16 of the upper chord slider 1, keeping the adjusting block lock hook 311 and the cutting needle seat lock hook 23 in a disengaged state.

[0070] Once the upper winding slider 1 moves to the designated position and locks itself in place, the upper winding action is complete, and the next stimulation biopsy action can be performed.

[0071] The structure of the winding and firing mechanism has been described above. The working process of the winding and firing reset mechanism is as follows:

[0072] At the start of winding, the cutting needle seat 2 and the outer needle seat 4 are in the activated state, and the winding slider 1 is in the first position at the rear. When the winding button 83 is pressed, the winding slider 1 moves in the needle insertion direction, and the downward pressing slope 15 presses the stop hook 33 away from the winding slider 1. The cutting needle seat locking hook 23 disengages from the adjusting block locking hook 311, and the winding slider 1 continues to move in the needle insertion direction. The connecting hole 12 at the end of the winding slider 1 engages with the second protrusion 21 at the end of the cutting needle seat 2, and the first protrusion 11 of the winding slider 1 contacts the front contact switch 91. The winding slider 1 drives the cutting needle seat 2 to move in the opposite direction of the needle insertion direction. After the cutting needle seat 2 touches the outer needle seat 4, the winding slider 1, the cutting needle seat 2, and the outer needle seat 4 move in the opposite direction of the needle insertion direction. The first protrusion 11 of the winding slider 1 contacts the rear contact switch 92, the winding slider 1 stops moving, and the spring 85 between the outer needle seat 4 and the inner needle seat 90 is compressed.

[0073] When activated, the trigger linkage 5 moves in the needle insertion direction and along the slope of the unlocking ramp 211, separating the upper chord slider 1 from the cutting needle seat 2. The cutting needle seat 2 and the outer needle seat 4 move in the needle insertion direction under the elastic force of the spring 85. The outer needle seat 4 stops moving after touching the adjusting block 3. The cutting needle seat 2 continues to move under the action of inertia until it touches the adjusting block 3 and stops. At the same time, the cutting needle seat locking hook 23 and the adjusting block locking hook 311 are engaged together.

[0074] The method of using the electric tube cutting needle according to the embodiment of the present invention is as follows: Press the upper winding button 83, the upper winding slider 1 is reset to engage with the cutting needle seat 2, and the cutting needle seat 2 and the outer needle seat 4 are driven to move in the opposite direction of the needle insertion direction to complete the upper winding; press the trigger linkage 5, the outer needle seat 4 and the cutting needle seat 2 move in the needle insertion direction, and the outer needle seat 4 and the cutting needle seat 2 are stopped by the adjustment block 3 in turn to complete the activation.

[0075] like Figures 17 to 19 As shown, the housing has two parallel tracks, with the upper slider 1 located on the first track 86 and the cutting needle seat 2 and the outer needle seat 4 located on the second track 87.

[0076] like Figure 20 , Figure 21 As shown, an indicator window 93 is provided on the housing of the second track 87 where the cutting needle seat 2 and the outer needle seat 4 are located, so that part of the cutting needle seat 2 or the outer needle seat 4 inside the track can be seen. By setting the cutting needle seat 2 and the outer needle seat 4 to different colors, the winding status inside the housing can be determined. Figure 20 The position diagram of the cut needle seat 2 and the outer needle seat 4 after activation is shown in the indicator window 93; Figure 21 The position of the cut-off needle seat 2 and the outer needle seat 4 after winding is indicated by the indicator window 93. The cut-off needle seat 2 can be seen from the indicator window 93. When the cut-off needle seat 2 is seen, it means that winding is complete and the device can be fired.

[0077] Please see Figure 22 , Figure 23 , Figure 22 This is a schematic diagram of the connection between the gear shift block and the housing. Figure 23 This is a schematic diagram of the structure of the part on the housing that connects to the adjustment block; Figure 22 In the middle, the adjusting block 3 extends from the side near the housing towards the needle insertion direction to form a pressing part 34. The pressing part 34 is connected to the second push button 36 located on the outside of the housing through the connecting wall 35. The housing is provided with a long through hole 94 for the movement of the second push button 36. The pressing part 34 and the front end of the baffle wall 31 are set as upper and lower parts, and a notch 37 is provided between the pressing part 34 and the front end of the baffle wall 31. The two-part design of the pressing part 34 and the front end of the baffle wall 31 is to make it easier to achieve elastic deformation, which is easier to achieve when the second push button 36 is pressed and when the downward inclined surface 15 is pressed against the adjusting block 3. Trapezoidal protrusions 38 are provided on both sides of the connecting wall 35. Multiple trapezoidal slots 95, corresponding to the shape and size of the trapezoidal protrusions 38, are arranged longitudinally on both sides of the elongated through hole 94 on the housing. In this embodiment, there are three trapezoidal slots 95. When no external force is applied to the second push button 36, the trapezoidal protrusions 38 are exactly located in the trapezoidal slots 95. When force is applied to the second push button 36 towards the inside of the housing, the trapezoidal protrusions 38 disengage from the trapezoidal slots 95. The second push button 36 can then push the adjusting block 3 to move parallel to the needle insertion direction. In this way, the adjusting block 3 is slidably mounted on the housing and positioned by the trapezoidal slots 95. Figure 22 In the middle, the side of the trapezoidal protrusion 38 on the needle insertion direction is a vertical surface, and the other side is an outward inclined surface; due to the setting of the inclined surface on the opposite side of the needle insertion direction on the trapezoidal protrusion 38, it is not necessary to press when moving in the opposite direction of the needle insertion direction, but it is necessary to press to adjust the gear when moving in the needle insertion direction.

[0078] The second push button 36 has a setting protrusion 39 on its back. After activation, the cutting needle seat 2 abuts against the setting protrusion 39, preventing the biopsy needle from being adjusted after activation. After winding, the cutting needle seat 2 moves away from the setting protrusion 39, allowing the second push button 36 to be pressed for setting adjustment. The setting protrusion 39 is designed to prevent the doctor from incorrectly adjusting the setting after sampling, which could cause the inner needle and cutting needle to compress the tissue inside the outer needle. Therefore, the setting can only be adjusted as needed after winding.

[0079] In this embodiment of the invention, the adjustment method of the adjustment block 3 is as follows: push the second push button 36 in the opposite direction of needle insertion to shorten the stroke of the needle seat 2 and the outer needle seat 4; press the second push button 36 and push the second push button 36 in the direction of needle insertion to lengthen the stroke of the needle seat 2 and the outer needle seat 4.

[0080] Figure 24 This is a structural schematic diagram of the adjustment block 3 from another perspective of an embodiment of the present invention. As can be seen from the figure, the adjustment block protrusion 39 is located on the back of the second push button 36.

[0081] After activation, the outer needle holder 4 and the cutting needle holder 2 stop by impacting the adjusting block 3; see also Figure 16 The sliding groove 32 of the connecting surface between the adjusting block 3 and the cutting needle seat 2 and the outer needle seat 4 is provided with a groove 40. See also Figure 11 The right end of the cutting needle holder 2, which is close to the adjustment block 3, extends toward the adjustment block 3 to form an extension 24. The size of the extension 24 corresponds to the size of the groove 40. After activation, the cutting needle holder 2 moves in the needle insertion direction. The extension 24 is located in the groove 40. The extension 24 hits the groove wall of the groove 40 and stops, thereby avoiding impact on the weak parts such as the stop hook of the cutting needle holder 2.

[0082] The outer needle holder 4 and the cutting needle holder 2 stop by impacting the adjusting block 3. Please refer to [link / reference]. Figures 25 to 27 When the outer needle seat 4 collides with the adjusting block 3, two rounded corners 41 are provided on the outer needle seat 4. The rounded corners 41 are located at the tail of the rectangular boss 42 that slides in the groove 32 of the outer needle seat 4, and are located between the side of the rectangular boss 42 and the baffle 31 of the outer needle seat 4. When the outer needle seat 4 slides along the groove 32 of the adjusting block 3, the rounded corners 41 first collide with the two walls of the groove 32. The elastic energy absorption method of the two walls of the groove 32 expanding outward can reduce the vibration of the outer needle.

[0083] Figure 28 This is a schematic diagram of the second external structure of the electric tube cutting needle according to an embodiment of the present invention. Figure 29 This is a side view schematic diagram of a second external structure of the electric tube cutting needle according to an embodiment of the present invention. Figure 28 and Figure 29 As shown, this structure adds a lighting lamp 01, and the power switch 02 for the electric tube cutter is located at the tail of the housing. The housing consists of the upper housing 8 and the lower housing 9 described above.

[0084] Figure 30 yes Figure 28 A cross-sectional view of the electric tube cutter shown. Figure 30 As shown, the lighting lamp 01 includes a lamp tube 011 and an LED 012, with the lamp tube 011 connected to the circuit board 10. Because the electric tube cutter experiences vibration due to the motor 7 during operation, the LED 012 is housed within the lamp tube 011 for stable lighting. Figure 30 From the perspective, the right side is the first side of the casing, the left side is the second side of the casing, the top is the first end of the casing, the bottom is the second end of the casing, and to the left is the direction of needle insertion during the puncture procedure. (Combined with...) Figure 29 , Figure 30 As can be seen, the power switch 02 is located away from the first push button 52 and the upper winding button 83, which helps to prevent accidental activation of the power switch 02 during surgical operations, especially when the first push button 52 and the upper winding button 83 are pressed.

[0085] The power switch 02 is a toggle switch, which has a main body 021 and a toggle block 022 protruding from the main body 021. The main body 021 is located inside the housing, and the top of the toggle block 022 is flush with the housing, which can minimize the risk of accidental activation of the power switch 02.

[0086] Additionally, see Figure 28 Because the shell is flat overall, the vertical direction (see...) Figure 29 The space is small, so the wires are placed close to the first side of the housing (see...). Figure 30 The wiring is arranged (wires not shown in the figure) to make full use of the internal space of the housing. The inner wall of the bottom surface of the lower housing 9 is provided with multiple, for example, four, ribs 96. The battery 81 is located on the ribs 96, and there is a gap between it and the inner wall of the bottom surface to form a channel. The wires pass through the channel and extend upward to the circuit board.

[0087] Figure 31 This is a schematic diagram of a second structure of the gear-adjusting block in an embodiment of the present invention. For example... Figure 31 As shown, the adjusting block 3 has a stop hook 033, a base plate 320, a slide groove 32, and a second push button 36. The stop hook 033 includes a first arm 1331, a second arm 1332, a third arm 2331, a fourth arm 2332, and a connecting part 0330. The base plate 320 can be considered as an extension of the bottom 3103 of the slide groove 32. The second push button 36 is located on the lower surface of the base plate 320 (from the perspective shown in the figure). The first arm 1331 and the second arm 1332 are connected to form an L-shape, and the third arm 2331 and the fourth arm 2332 are connected to form an L-shape. The bends of the two L-shapes are connected by the connecting part 0330, which significantly enhances the strength of the two L-shapes, allowing the adjusting block 3 to remain intact when impacted by the cutting needle seat 2.

[0088] The slide groove 32 is equipped with a slide groove stop 321 to provide a more solid impact surface, so as to more stably withstand the direct impact of the cutting needle seat 2. The outer sides of the first wall 3101 and the second wall 3102 of the slide groove 32 are provided with multiple wall grooves 301, such as... Figure 31 There are four wall grooves 301 shown. Considering that when the cutting needle seat 2 is impacted, the direction of the impact force cannot be absolutely parallel to the extension direction of the groove 32, that is, there is a lateral component, the wall grooves 301 can make the first wall 3101 and the second wall 3102 have a certain lateral flexibility, which helps to prevent them from breaking under the impact of the cutting needle seat 2.

[0089] The first arm 1331 and the third arm 2331 have downward protrusions below them. The first protrusion 1333, which protrudes towards the base plate 320, can be seen in the figure. The protrusions below the first arm 1331 and the third arm 2331 allow the second arm 1332 and the fourth arm 2332 to bend downward to a certain extent, so that the protrusions can abut against the upper surface of the base plate 320, thereby preventing the second arm 1332 and the fourth arm 2332 from bending downward to an excessive degree and causing damage.

[0090] Furthermore, the thickness of the first wall 3101 and the second wall 3102 of the chute 32 can be increased to make it more resistant to the impact of the cutting needle seat 2. The thickness of the first wall 3101 and the second wall 3102 can be 4 to 6 times the thickness of the bottom 3103 of the chute.

[0091] According to the technical solution of the present invention, the adjustment block structure of the electric tube cutting needle is further improved, its mechanical strength is enhanced, thereby improving its reliability.

[0092] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A stop block for an electric tube cutting needle, characterized in that, Includes a stop hook, a base plate, a slide groove, and a second push button, wherein: The stop hook includes a first arm, a second arm, a third arm, a fourth arm, and a connecting part; The base plate is connected to the bottom of the chute and the two are coplanar; The second push button is installed on the lower surface of the base plate, and the pressing direction of the second push button is consistent with the extension direction of the first arm and the third arm; The first arm and the second arm are connected in an L-shape. The second arm is connected to the top edge of the first wall of the chute and the second arm extends in the same direction as the first wall. The third arm and the fourth arm are connected in an L-shape. The fourth arm is connected to the top edge of the second wall of the chute, and the second arm extends in the same direction as the second wall. The two ends of the connecting part are respectively connected to the connection between the first arm and the second arm and the connection between the third arm and the fourth arm, so that the connecting part, the first arm and the third arm form a U shape, and the first arm and the third arm extend away from the bottom plate. The chute is provided with a chute stop block, which is adjacent to one end of the groove for accommodating the movement of the cutting needle seat located inside the chute, and the side of the chute stop block facing the chute inlet is used to receive the impact of the cutting needle seat during movement. A first protrusion is provided at the connection between the first arm and the second arm, and a second protrusion is provided at the connection between the third arm and the fourth arm; both the first and second protrusions protrude towards the bottom plate.

2. The adjusting block of the electric tube cutting needle according to claim 1, characterized in that, The outer sides of the first and second walls of the chute are provided with wall grooves, and the extension direction of the wall grooves is perpendicular to the bottom of the chute.

3. The adjusting block of the electric tube cutting needle according to claim 1 or 2, characterized in that, The thickness of the first and second walls of the chute is 4 to 6 times the thickness of the bottom of the chute.

4. An electric tube cutting needle, characterized in that, The adjusting block of the electric tube cutting needle is the adjusting block according to any one of claims 1 to 3.

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