Gear shifting structure and electric tube cutting needle

Abstract

The application discloses a file adjusting structure and an electric pipe cutting needle, and the file adjusting structure is used for adjusting the firing range of a biopsy needle and comprises a threaded part, a file adjusting part which is threadedly connected with the threaded part, a gear position indicating part which is arranged on the file adjusting part, and a blocking part which is arranged on the file adjusting part. After the biopsy needle is fired, the needle seat of the biopsy needle is stopped by impacting the blocking part. The threaded part is rotated to drive the file adjusting part and the blocking part to move along the needle insertion direction of the biopsy needle or in the reverse direction to adjust the firing range of the biopsy needle. The threaded part is rotated to drive the file adjusting part and the gear position indicating part to move along the needle insertion direction of the biopsy needle or in the reverse direction to indicate the firing range distance of the biopsy needle. The application can realize stepless file adjusting, the firing range of the biopsy needle can be adjusted at will in an interval range, there is no position where impact stress is particularly concentrated on the file adjusting structure, the file adjusting structure can bear a larger number of firing impacts, the firing range distance of the biopsy needle can be indicated, and it is convenient for an operator to confirm the firing distance.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a gear adjustment structure and an electric tube cutting needle. Background Technology

[0002] Existing biopsy needle adjustment blocks typically only allow for fixed adjustment in a few positions (e.g., three positions), resulting in a limited range of excitation distance adjustment. Furthermore, existing adjustment blocks experience stress concentration upon impact with the needle hub, making them prone to breakage at stress-concentrated points after repeated excitations. Additionally, existing adjustment blocks lack position indicator structures, hindering operators from confirming the excitation distance. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides an adjustable range structure and an electric tube cutting needle. The adjustable range structure enables stepless adjustment, allowing the excitation range of the biopsy needle to be arbitrarily adjusted within a range. Furthermore, the adjustable range structure has no areas with particularly concentrated impact stress, allowing it to withstand a large number of excitation impacts. It can also indicate the excitation range distance of the biopsy needle, making it convenient for operators to confirm the excitation distance.

[0004] The specific technical solution provided in this application is as follows:

[0005] In a first aspect, a setting structure is provided for adjusting the firing range of a biopsy needle, and includes a threaded portion, a setting portion threadedly connected to the threaded portion, a setting indicator portion disposed on the setting portion, and a blocking portion disposed on the setting portion. After the biopsy needle is fired, the needle seat of the biopsy needle stops by impacting the blocking portion.

[0006] The firing range of the biopsy needle is adjusted by rotating the threaded part to move the adjusting part and the blocking part along the needle insertion direction or in the opposite direction.

[0007] The rotation of the threaded part drives the adjustment part and the position indicator part to move along the direction of the biopsy needle insertion or in the opposite direction to indicate the excitation range distance of the biopsy needle.

[0008] As a preferred embodiment of the above scheme, the adjustment structure also includes an adjustment rod connected to the threaded part and an adjustment knob disposed on the adjustment rod. By rotating the adjustment rod through the adjustment knob, the adjustment rod drives the threaded part to rotate.

[0009] As a preferred embodiment of the above scheme, the gear shifting structure further includes a bearing section and a limiting section disposed on the adjusting rod. The ends of the adjusting rod and the threaded section that are opposite to each other are respectively disposed on the bearing section, and the limiting section is used to block and limit the movement of the gear shifting section.

[0010] As a preferred embodiment of the above solution, the blocking part includes a base plate and a sliding groove part disposed on the base plate. The base plate is fixedly connected to the adjusting part. The sliding groove part and the adjusting part are located on opposite surfaces of the base plate. The needle seat of the biopsy needle is slidably disposed on the sliding groove part. After the biopsy needle is activated, the needle seat of the biopsy needle stops by impacting the wall of the sliding groove part.

[0011] As a preferred embodiment of the above solution, the gear indicator includes an extension strip disposed on the side wall of the base plate, an indicator block disposed on the extension strip away from the side wall of the base plate, and an indicator mark disposed on the indicator block, the indicator mark including an arrow or a triangle.

[0012] In a second aspect, an excitation stop assembly is provided, including a biopsy needle, a needle seat of the biopsy needle, and the above-mentioned adjustment structure. The biopsy needle includes an outer needle and a cutting needle, and the needle seat of the biopsy needle includes an outer needle seat and a cutting needle seat. The outer needle and the cutting needle are respectively disposed in the outer needle seat and the cutting needle seat.

[0013] After the biopsy needle is activated, the outer needle hub and the cutting needle hub stop by striking the corresponding parts of the blocking part in sequence.

[0014] As a preferred embodiment of the above solution, a locking tongue is formed on the side wall of the outer needle seat facing the cutting needle seat, and a stop groove is formed on the cutting needle seat, with the locking tongue slidably disposed in the stop groove.

[0015] After the biopsy needle is activated, the cut-off needle seat stops by striking the locking tongue through the stop groove;

[0016] When the stop groove hits the latch and the latch breaks, the cut-off needle seat moves toward the blocking part and stops by hitting the blocking part.

[0017] As a preferred embodiment of the above solution, the locking tongue includes a stop portion and an extension portion. One end of the extension portion forms the stop portion, and the other end forms an arc portion. The arc portion is formed on the side wall of the outer needle seat facing the cutting needle seat.

[0018] The cutting needle holder also has a connecting stop groove and an extension groove on the side wall of the cutting needle holder facing the outer needle holder. The stop part is slidably disposed in the stop groove, and the extension part is slidably disposed in the extension groove.

[0019] Thirdly, an electric tube cutting needle is provided, including a housing and the above-mentioned adjustment structure or the above-mentioned excitation stop assembly, wherein the adjustment structure and the needle seat of the biopsy needle are slidably disposed in the housing, and the biopsy needle portion extends out of the housing;

[0020] The housing has a long, narrow first through-slot that runs through the outer wall of the housing. The gear position indicator is slidably disposed in the first through-slot. On the outer wall of the housing on one side of the first through-slot, there is an indicator mark indicating the excitation range distance of the biopsy needle. The indicator mark cooperates with the gear position indicator.

[0021] As a preferred embodiment of the above solution, a guide rail extending along the insertion direction of the biopsy needle is formed on the inner wall of the housing, and a first protrusion is formed on the adjustment part, the first protrusion being slidably disposed on the guide rail.

[0022] The adjustment mechanism of this application, by incorporating a threaded section, an adjustment section, a position indicator, and a blocking section, allows the adjustment section to move along the insertion direction of the biopsy needle or in the opposite direction by rotating the threaded section. The adjustment section also drives the blocking section to move along the insertion direction of the biopsy needle or in the opposite direction. Simultaneously, since the biopsy needle's hub stops by impacting the blocking section after activation, the activation range of the biopsy needle increases when the blocking section moves along the insertion direction and decreases when it moves in the opposite direction. This threaded connection structure allows for… The adjustable part and the blocking part can be moved to any position within the threaded range, thereby achieving stepless adjustment. This allows the excitation range of the biopsy needle to be adjusted arbitrarily within the range. Moreover, the threaded connection structure means that the adjustable part does not need to be coordinated with other structures for adjustment. Therefore, there are no areas with particularly concentrated impact stress on the adjustable part structure, which can withstand a large number of excitation impacts without easily breaking or being damaged. At the same time, the adjustable part can drive the position indicator to move along the direction of the biopsy needle's insertion or in the opposite direction, thus indicating the excitation range distance of the biopsy needle, making it easy for the operator to confirm the excitation distance.

[0023] The excitation stopping component of this application, by incorporating a biopsy needle, a needle hub, and an adjustment mechanism, allows the outer needle hub and the cutting needle hub to stop after excitation by sequentially impacting a blocking part. Rotating the threaded part causes the adjustment part to move along the insertion direction of the biopsy needle or its reverse direction. The adjustment part, in turn, causes the blocking part to move along the insertion direction of the biopsy needle or its reverse direction. When the blocking part moves along the insertion direction of the outer and cutting needles, the excitation range of the outer and cutting needles increases; conversely, when the blocking part moves in the opposite direction, the excitation range of the outer and cutting needles decreases. This threaded connection structure allows for… The adjustment section and the blocking section can be moved to any position within the threaded range, thereby achieving stepless adjustment. This allows the firing range of the outer needle and the cutting needle to be adjusted arbitrarily within the range. Moreover, the threaded connection structure means that the adjustment section does not need to cooperate with other structures for adjustment. Therefore, there are no areas with particularly concentrated impact stress on the adjustment structure, which can withstand a large number of firing impacts without easily breaking or being damaged. At the same time, the adjustment section can drive the position indicator to move along the needle insertion direction of the outer needle and the cutting needle or in the opposite direction, thus indicating the firing range distance of the outer needle and the cutting needle, making it easy for the operator to confirm the firing distance.

[0024] The electric tube cutting needle of this application slides the adjustment mechanism and the needle seat of the biopsy needle inside the housing, with the biopsy needle extending out of the housing. The housing can isolate and protect the adjustment mechanism and the needle seat of the biopsy needle. When the adjustment part drives the position indicator to move along the insertion direction of the outer needle and the cutting needle or in the opposite direction, the position indicator slides along the first through groove. After the adjustment part stops moving, the position indicator cooperates with the indicator mark of the excitation range distance of the biopsy needle on the outer wall of the housing on one side of the first through groove to indicate the excitation range distance of the biopsy needle, thereby facilitating the operator to confirm the excitation distance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a file adjustment structure at one angle, provided in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of a file adjustment structure from another angle, provided in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the structure of an electric tube cutter provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the internal structure of an electric tube cutter provided in an embodiment of this application;

[0030] Figure 5 for Figure 4 A partial decomposition diagram;

[0031] Figure 6 This is a structural schematic diagram showing an angle between the outer needle seat and the cutting needle seat provided in an embodiment of this application.

[0032] Figure 7 This is a structural schematic diagram showing another angle between the outer needle seat and the cutting needle seat provided in an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the internal structure of the housing provided in an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of the external structure of the housing provided in an embodiment of this application.

[0035] The above figures include the following reference numerals:

[0036] Threaded part 11; Adjustment part 12; Threaded through hole 121; Second protrusion 122; First protrusion 123; Gear indicator part 13; Extension bar 131; Indicator block 132; Indicator mark 133; Blocking part 14; Base plate 141; Slide groove part 142; First wall 143; Second wall 144; Clearance groove 145; Second impact wall 146; Second arc surface wall 147; Fourth impact wall 148; Second inclined surface wall 149; Adjusting rod 15; Adjusting knob 16; Anti-slip texture 161; Limiting part 17 First bearing 181; Second bearing 182; Outer needle seat 2; First base plate 21; Base 22; First slide 23; First impact wall 24; First arc surface wall 25; Cutting needle seat 3; Second base plate 31; Second slide 32; Third impact wall 321; First inclined wall 322; Cut-off groove 33; Extension groove 34; Arc surface 35; Locking tongue 4; Cut-off part 41; Extension part 42; Arc part 43; Housing 5; First through groove 51; Indicator mark 52; Guide rail 53; Second through groove 54. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," and "bottom," etc., used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Puncture biopsy is the primary method for obtaining histopathological diagnosis of bone and soft tissue tumors. The biopsy needle is generally 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 line on the ultrasound image. Puncture biopsy procedures are divided into lateral incision and cannulation. Cannulation involves directly cutting and removing the tissue inside the outer needle. Compared to lateral incision biopsy needles, cannulation needles can obtain more abundant tissue. A cannulation biopsy needle consists of an inner needle, an outer needle, and a cutting needle, which are coaxially arranged from the inside out. The principle of catheterization for puncture 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 out of the tip of the inner needle and cuts into the tissue through the cutting edge. At this time, 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 of the outer needle and cuts the tissue inside the outer needle; 4. Finally, the inner needle, outer needle, and cutting needle are pulled out of the body, the cutting needle is withdrawn, and the tissue inside the outer needle is pushed out through the inner needle.

[0040] As described in the background section, existing biopsy needle adjustment blocks typically only allow for fixed adjustment in a few positions. For example, in patent document CN117398133A, the adjustment block has a trapezoidal protrusion, and the housing has three trapezoidal slots. The adjustment block is slidably mounted on the housing, and its positioning is achieved through the cooperation of the trapezoidal protrusion and the trapezoidal slots. Therefore, this adjustment block can only achieve fixed adjustment in three positions, resulting in a limited range of adjustment for the biopsy needle's firing range, which cannot meet the needs of more puncture biopsies. Furthermore, the impact stress experienced by the adjustment block after biopsy needle firing is concentrated on the trapezoidal protrusion and the trapezoidal slots. After repeated firing, these two components are prone to breakage and damage. Increasing the volume of these two components can improve the breakage situation to some extent, but it cannot completely solve the problem and may introduce new difficulties in adjustment.

[0041] The adjustment structure of this application can achieve stepless adjustment, allowing the excitation range of the biopsy needle to be adjusted arbitrarily within the range. Moreover, there are no areas with particularly concentrated impact stress on the adjustment structure, so it can withstand a large number of excitation impacts. At the same time, it can also indicate the excitation range distance of the biopsy needle, making it convenient for operators to confirm the excitation distance.

[0042] Example 1

[0043] This application provides a file retrieval structure, such as Figure 1 , Figure 2As shown, this device is used to adjust the firing range of a biopsy needle and includes a threaded portion 11, an adjustment portion 12 threadedly connected to the threaded portion 11, a position indicator 13 disposed on the adjustment portion 12, and a blocking portion 14 disposed on the adjustment portion 12. After the biopsy needle is fired, the needle seat of the biopsy needle stops by impacting the blocking portion 14. The threaded portion 11 can be a lead screw parallel to the insertion direction of the biopsy needle, and the adjustment portion 12 can be an adjustment block, on which a threaded through hole 121 is formed that mates with the threaded portion 11.

[0044] The stimulation range of the biopsy needle is adjusted by rotating the threaded part 11 to drive the adjustment part 12 and the blocking part 14 to move along the needle insertion direction or in the opposite direction; the stimulation range distance of the biopsy needle is indicated by rotating the threaded part 11 to drive the adjustment part 12 and the position indicator part 13 to move along the needle insertion direction or in the opposite direction.

[0045] like Figure 1 , Figure 2 As shown, the adjustment structure also includes an adjusting rod 15 connected to the threaded portion 11 and an adjusting knob 16 disposed on the adjusting rod 15. By rotating the adjusting rod 15 with the adjusting knob 16, the adjusting rod 15 drives the threaded portion 11 to rotate. One end of the adjusting rod 15 is fixedly connected to the threaded portion 11 and is coaxially disposed with the threaded portion 11. The adjusting knob 16 may be roller-shaped and has a through hole (not shown) formed at its center for fixing and inserting into the adjusting rod 15. Anti-slip texture 161 may be formed on the outer axial side of the adjusting knob 16.

[0046] like Figure 1 , Figure 2 As shown, the gear-adjusting structure also includes a bearing portion and a limiting portion 17 disposed on the adjusting rod 15. The ends of the adjusting rod 15 and the threaded portion 11 that are opposite to each other are respectively disposed on the bearing portion. The limiting portion 17 is used to block and limit the movement of the gear-adjusting portion 12. The limiting portion 17 can be an annular protrusion formed on the adjusting rod 15 on one side of the threaded portion 11. The bearing portion includes a first bearing 181 and a second bearing 182. The ends of the adjusting rod 15 and the threaded portion 11 that are opposite to each other are respectively disposed on the first bearing 181 and the second bearing 182, facilitating the rotation of the adjusting rod 15 and the threaded portion 11. The adjusting knob 16 is fixedly inserted into the adjusting rod 15 between the first bearing 181 and the limiting portion 17. A second protrusion 122 may be formed on the gear shifting part 12. When the gear shifting part 12 moves along the threaded part 11, the second protrusion 122 cooperates with the limiting part 17 to block and limit the gear shifting part 12, thereby limiting the movement distance of the gear shifting part 12 and making it easier to limit the gear shifting range.

[0047] like Figure 2As shown, the blocking part 14 includes a base plate 141 and a sliding groove 142 disposed on the base plate 141. The base plate 141 is fixedly connected to the adjusting part 12. The sliding groove 142 and the adjusting part 12 are located on the surface opposite to the base plate 141. The needle seat of the biopsy needle is slidably disposed on the sliding groove 142. After the biopsy needle is activated, the needle seat of the biopsy needle stops by impacting the wall surface of the sliding groove 142. The length direction of the base plate 141 and the sliding groove 142 is consistent with the needle insertion direction. The sliding groove 142 includes a pair of first walls 143 disposed opposite to each other and a second wall 144 connected between one end of the first walls 143. The first walls 143 and the second walls 144 are formed on the side wall of the base plate 141 opposite to the adjusting part 12. The needle seat of the biopsy needle is slidably disposed between the first walls 143, the second walls 144 and the base plate 141. An avoidance groove 145 for the biopsy needle to pass through is formed on the second wall 144.

[0048] like Figure 2 As shown, the gear position indicator 13 includes an extension bar 131 disposed on the side wall of the base plate 141, an indicator block 132 disposed on the side wall of the extension bar 131 away from the base plate 141, and an indicator mark 133 disposed on the indicator block 132. The indicator mark 133 includes, but is not limited to, an arrow or a triangle. The extension bar 131 is located on the side wall of the base plate 141 between the gear shifting part 12 and the slide groove part 142, and both ends of the extension bar 131 extend out of the base plate 141. The indicator block 132 can be fixed at the middle position of the extension bar 131, and the indicator mark 133 can be disposed at the middle of the side wall of the indicator block 132 away from the extension bar 131.

[0049] The adjustment mechanism of this application includes a threaded portion 11, an adjustment portion 12, a position indicator portion 13, and a blocking portion 14. Rotating the threaded portion 11 causes the adjustment portion 12 to move along the insertion direction of the biopsy needle or in the opposite direction, while the adjustment portion 12 causes the blocking portion 14 to move along the insertion direction of the biopsy needle or in the opposite direction. Simultaneously, after the biopsy needle is activated, the needle seat stops by impacting the blocking portion 14. Therefore, when the blocking portion 14 moves along the insertion direction of the biopsy needle, the activation range of the biopsy needle increases; when the blocking portion 14 moves in the opposite direction of the insertion direction, the activation range of the biopsy needle decreases. This is achieved through the threaded connection... The threaded connection allows the adjusting part 12 and the blocking part 14 to move to any position within the threaded range, thereby achieving stepless adjustment. This allows the excitation range of the biopsy needle to be adjusted arbitrarily within the range. Moreover, the threaded connection structure eliminates the need for the adjusting part 12 to coordinate with other structures for adjustment. Therefore, there are no areas with particularly concentrated impact stress on the adjusting structure, allowing it to withstand a large number of excitation impacts without easily breaking or being damaged. At the same time, the adjusting part 12 can drive the position indicator 13 to move along the needle insertion direction or in the opposite direction, thus indicating the excitation range distance of the biopsy needle and making it easy for the operator to confirm the excitation distance.

[0050] Example 2

[0051] This application provides an excitation stop assembly, including a biopsy needle (not shown), a needle hub for the biopsy needle, and a setting structure as described in Embodiment 1. The biopsy needle includes an outer needle, a cutting needle, and an inner needle, as shown in Embodiment 1. Figure 4 , Figure 5 As shown, the biopsy needle hub includes an outer needle hub 2, a cutting needle hub 3, and an inner needle hub (not shown). The outer needle, cutting needle, and inner needle are respectively disposed on the outer needle hub 2, the cutting needle hub 3, and the inner needle hub. The cutting needle hub 3 and the outer needle hub 2 are located on a straight line parallel to the needle insertion direction and are arranged sequentially from near to far from the needle exit end.

[0052] After the biopsy needle is activated, the outer needle hub 2 and the cutting needle hub 3 stop by successively striking the corresponding parts of the blocking part 14. For example... Figure 2 , Figure 7 As shown, the corresponding portion of the blocking part 14 refers to the rear end sidewall of the first wall 143 facing the needle insertion direction and the sidewall of the second wall 144 facing the first wall 143. The outer needle holder 2 includes a first base plate 21, a base 22 formed on the first base plate 21, and a first slide 23 formed on the base 22. A first impact wall 24 and a first arcuate wall 25 connecting the base 22 and the first slide 23 are formed at the connection. The first impact wall 24 can be a straight wall. The rear end sidewall of the first wall 143 facing the needle insertion direction includes a second impact wall 146 and a second arcuate wall 147 connecting the second impact wall 146. The second impact wall 146 can be a straight wall. When the outer needle holder 2 impacts, the first impact wall 24 impacts the second impact wall 146. The first arcuate wall 25 and the second arcuate wall 147 cooperate to achieve buffering to reduce the vibration of the outer needle. The cutting needle holder 3 includes a second substrate 31 and a second slide 32 formed on the second substrate 31. A third impact wall 321 and a first inclined wall 322 connected to the third impact wall 321 are formed on the front end sidewall of the second slide 32 along the needle insertion direction. The third impact wall 321 can be a straight wall. The sidewall of the second wall 144 facing the first wall 143 includes a fourth impact wall 148 and a second inclined wall 149 connected to the fourth impact wall 148. The fourth impact wall 148 can be a straight wall. When the cutting needle holder 3 impacts, the third impact wall 321 impacts the fourth impact wall 148. The first inclined wall 322 and the second inclined wall 149 cooperate to achieve buffering to reduce the vibration of the cutting needle.

[0053] like Figure 6As shown, a locking tongue 4 is formed on the side wall of the outer needle seat 2 facing the cutting needle seat 3, and a stop groove 33 is formed on the cutting needle seat 3. The locking tongue 4 is slidably disposed in the stop groove 33. After the biopsy needle is activated, the outer needle seat 2 first impacts the first wall 143 and then stops. After the outer needle seat 2 stops, the cutting needle seat 3 continues to move a distance in the needle insertion direction under the action of inertia, and stops by impacting the locking tongue 4 through the stop groove 33. If the locking tongue 4 breaks when the stop groove 33 impacts the locking tongue 4, the cutting needle seat 3 continues to move a distance in the needle insertion direction and stops by impacting the blocking part 14. In this way, even if the locking tongue 4 breaks, it can prevent the cutting needle seat 3 from continuing to move forward, avoiding the cutting blade of the cutting needle from being broken and causing an accident.

[0054] like Figure 6 As shown, the latch 4 includes a stop portion 41 and an extension portion 42. One end of the extension portion 42 forms the stop portion 41, and the other end forms an arc portion 43. The arc portion 43 is formed on the side wall of the outer needle seat 2 facing the cutting needle seat 3. The cutting needle seat 3 also has an extension groove 34 that connects the stop groove 33 and the side wall of the cutting needle seat 3 facing the outer needle seat 2. The stop portion 41 is slidably disposed in the stop groove 33, and the extension portion 42 is slidably disposed in the extension groove 34. An arc surface 35 is formed at the connection between the extension groove 34 and the side wall of the cutting needle seat 3 facing the outer needle seat 2. Before the outer needle seat 2 and the cutting needle seat 3 are activated, a winding operation is performed. During winding, the arc portion 43 and the arc surface 35 abut against each other to enhance the synchronous movement effect between the outer needle seat 2 and the cutting needle seat 3. The outer needle holder 2 and the cutting needle holder 3 can be wound by the winding slider and its electric drive structure in related technologies, and can be activated by the elastic element, triggering link and other structures in related technologies, which will not be described in detail here.

[0055] The excitation stopping assembly of this application, by incorporating a biopsy needle, a needle holder for the biopsy needle, and a adjusting structure, stops the external needle holder 2 and the cutting needle holder 3 after excitation by successively impacting the blocking part 14. By rotating the threaded part 11, the adjusting part 12 moves along the insertion direction of the biopsy needle or in its reverse direction. The adjusting part 12 then moves the blocking part 14 along the insertion direction of the biopsy needle or in its reverse direction. When the blocking part 14 moves along the insertion direction of the external needle and the cutting needle, the excitation range of the external needle and the cutting needle increases; when the blocking part 14 moves in the opposite direction of the insertion direction of the external needle and the cutting needle, the excitation range of the external needle and the cutting needle decreases. The assembly is connected by a threaded joint. The structure allows the adjusting part 12 and the blocking part 14 to be moved to any position within the threaded range, thereby achieving stepless adjustment. This allows the firing range of the outer needle and the cutting needle to be adjusted arbitrarily within the range. Moreover, the threaded connection structure means that the adjusting part 12 does not need to be coordinated with other structures for adjustment. Therefore, there are no areas with particularly concentrated impact stress on the adjusting structure, which can withstand a large number of firing impacts without easily breaking or being damaged. At the same time, the adjusting part 12 can drive the position indicator part 13 to move along the needle insertion direction of the outer needle and the cutting needle or in the opposite direction, thus indicating the firing range distance of the outer needle and the cutting needle, making it easy for the operator to confirm the firing distance.

[0056] Example 3

[0057] This application provides an electric tube cutting needle, such as Figure 3 As shown, it includes a housing 5 and a gear adjustment structure as in Embodiment 1 or an excitation stop assembly as in Embodiment 2. The gear adjustment structure and the needle seat of the biopsy needle are slidably disposed within the housing 5, and the biopsy needle portion extends out of the housing 5.

[0058] like Figure 3 , Figure 9 As shown, a long strip-shaped first through groove 51 is formed on the housing 5, penetrating the outer wall of the housing 5. The gear position indicator 13 is slidably disposed in the first through groove 51. An indicator mark 52 for the excitation range distance of the biopsy needle is provided on the outer wall of the housing 5 on one side of the first through groove 51. The indicator mark 52 cooperates with the gear position indicator 13, and the indicator mark 133 of the gear position indicator 13 is aligned with the indicator mark 52 to achieve the indication effect.

[0059] Specifically, such as Figure 3 , Figure 9As shown, the housing 5 and the first through slot 51 extend along the needle insertion direction. The indicator block 132 of the gear indicator 13 is inserted into the first through slot 51, and the extension bar 131 can be observed through the first through slot 51. The structure of the extension bar 131 extending from the bottom plate 141 at both ends ensures that the extension bar 131 always covers the first through slot 51 when the gear indicator 13 is adjusted, thus preventing the structure inside the housing 5 from being exposed through the first through slot 51 and affecting the aesthetics of the electric tube cutting needle. In addition, the portions of the extension bar 131 extending from the bottom plate 141 at both ends can be slidably disposed in the guide groove (not shown) on the inner wall of the housing 5, which further ensures the gear adjustment position of the gear adjustment structure.

[0060] like Figure 9 As shown, the indicator mark 52 on the outer wall of the housing 5, which indicates the excitation range distance of the biopsy needle, can be used to indicate the sampling length of the biopsy needle. Several commonly used sampling lengths can be selected as the indicator mark 52. In this embodiment, three levels, 13, 23, and 33, are used as examples, where the sampling length unit is millimeters.

[0061] like Figure 8 As shown, a guide rail 53 extending along the insertion direction of the biopsy needle is formed on the inner wall of the housing 5. A first protrusion 123 is formed on the adjustment part 12, and the first protrusion 123 is slidably disposed on the guide rail 53. The guide rail 53 guides the adjustment part 12 through its cooperation with the first protrusion 123, thereby improving the adjustment effect. The first protrusion 123 and the second protrusion 122 can be disposed opposite to each other on the outer wall of the adjustment part 12. The first bearing 181 and the second bearing 182 can be fixed inside the housing 5. A second through groove 54 penetrating the outer wall of the housing 5 is also formed on the housing 5. The adjustment knob 16 is rotatably disposed in the second through groove 54, and part of the adjustment knob 16 protrudes outside the second through groove 54, so as to facilitate the rotation of the adjustment knob 16 to drive the adjustment rod 15 and the threaded part 11 to rotate.

[0062] The electric tube cutting needle of this application slides the adjustment structure and the needle seat of the biopsy needle inside the housing 5, with the biopsy needle extending out of the housing 5. The housing 5 can isolate and protect the adjustment structure and the needle seat of the biopsy needle. When the adjustment part 12 drives the position indicator part 13 to move along the insertion direction of the outer needle and the cutting needle or in the opposite direction, the position indicator part 13 slides along the first through groove 51. After the adjustment part 12 stops moving, the position indicator part 13 cooperates with the indicator mark 52 of the excitation range distance of the biopsy needle on the outer wall of the housing 5 on one side of the first through groove 51 to indicate the excitation range distance of the biopsy needle, thereby facilitating the operator to confirm the excitation distance.

[0063] Although preferred embodiments have been described in this application, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of this application.

[0064] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A gear-adjusting structure, characterized in that, It is used to adjust the firing range of the biopsy needle and includes a threaded part (11), a setting part (12) threadedly connected to the threaded part (11), a setting indicator part (13) provided on the setting part (12), and a blocking part (14) provided on the setting part (12). After the biopsy needle is fired, the needle seat of the biopsy needle stops by hitting the blocking part (14). The stimulation range of the biopsy needle is adjusted by rotating the threaded part (11) to drive the adjusting part (12) and the blocking part (14) to move along the needle insertion direction or in the opposite direction of the biopsy needle. By rotating the threaded part (11), the adjustment part (12) and the position indicator part (13) are driven to move along the needle insertion direction of the biopsy needle or in the opposite direction to indicate the excitation range distance of the biopsy needle. The adjustment structure also includes a biopsy needle and a needle seat of the biopsy needle. The biopsy needle includes an outer needle and a cutting needle. The needle seat of the biopsy needle includes an outer needle seat (2) and a cutting needle seat (3). The outer needle and the cutting needle are respectively disposed in the outer needle seat (2) and the cutting needle seat (3). After the biopsy needle is activated, the outer needle seat (2) and the cutting needle seat (3) stop by striking the corresponding parts of the blocking part (14) in succession; A locking tongue (4) is formed on the side wall of the outer needle seat (2) facing the cutting needle seat (3), and a stop groove (33) is formed on the cutting needle seat (3). The locking tongue (4) is slidably disposed in the stop groove (33). After the biopsy needle is activated, the cutting needle seat (3) stops by striking the locking tongue (4) through the stop groove (33); When the stop groove (33) strikes the latch (4) and the latch (4) breaks, the cut-off needle seat (3) moves toward the blocking part (14) and stops by striking the blocking part (14).

2. The gear-adjusting structure according to claim 1, characterized in that, It also includes an adjusting rod (15) connected to the threaded portion (11) and an adjusting knob (16) provided on the adjusting rod (15). The adjusting rod (15) is rotated by the adjusting knob (16), and the adjusting rod (15) drives the threaded portion (11) to rotate.

3. The gear shifting structure according to claim 2, characterized in that, It also includes a bearing portion and a limiting portion (17) disposed on the adjusting rod (15). The ends of the adjusting rod (15) and the threaded portion (11) that are opposite to each other are respectively disposed on the bearing portion. The limiting portion (17) is used to block and limit the adjusting portion (12) when the adjusting portion (12) moves.

4. The gear-adjusting structure according to claim 1, characterized in that, The blocking part (14) includes a base plate (141) and a sliding groove (142) disposed on the base plate (141). The base plate (141) is fixedly connected to the adjusting part (12). The sliding groove (142) and the adjusting part (12) are located on the surface opposite to the base plate (141). The needle seat of the biopsy needle is slidably disposed on the sliding groove (142). After the biopsy needle is activated, the needle seat of the biopsy needle stops by hitting the wall of the sliding groove (142).

5. The gear-adjusting structure according to claim 4, characterized in that, The gear indicator (13) includes an extension strip (131) disposed on the side wall of the base plate (141), an indicator block (132) disposed on the side wall of the extension strip (131) away from the base plate (141), and an indicator mark (133) disposed on the indicator block (132). The indicator mark (133) includes an arrow or a triangle.

6. The gear-adjusting structure according to claim 1, characterized in that, The latch (4) includes a stop portion (41) and an extension portion (42). One end of the extension portion (42) forms the stop portion (41), and the other end forms an arc portion (43). The arc portion (43) is formed on the side wall of the outer needle seat (2) facing the cutting needle seat (3). The cutting needle seat (3) also has an extension groove (34) that connects the cut-off groove (33) and the side wall of the cutting needle seat (3) facing the outer needle seat (2). The cut-off part (41) is slidably disposed in the cut-off groove (33), and the extension part (42) is slidably disposed in the extension groove (34).

7. An electric tube cutting needle, characterized in that, It includes a housing (5) and a gear adjustment structure as described in any one of claims 1-6, wherein the gear adjustment structure is slidably disposed within the housing (5) and the biopsy needle portion extends out of the housing (5). The housing (5) has a long strip-shaped first through groove (51) that runs through the outer wall of the housing (5). The gear position indicator (13) is slidably disposed in the first through groove (51). The outer wall of the housing (5) on one side of the first through groove (51) is provided with an indicator mark (52) indicating the excitation range distance of the biopsy needle. The indicator mark (52) cooperates with the gear position indicator (13).

8. The electric tube cutting needle according to claim 7, characterized in that, A guide rail (53) extending along the insertion direction of the biopsy needle is formed on the inner wall of the housing (5), and a first protrusion (123) is formed on the adjustment part (12), and the first protrusion (123) is slidably disposed on the guide rail (53).

Images