Gear shifting structure, excitation stop assembly and electric tube cutting needle

Abstract

The invention discloses a gear shifting structure, an excitation stop assembly and an electric tube cutting needle, the gear shifting structure is used for adjusting the excitation range of a biopsy needle and comprises a thread part, a gear shifting part in threaded connection with the thread part, a gear indicating part arranged on the gear shifting part and a blocking part arranged on the gear shifting part, and after the biopsy needle is excited, the gear shifting part is in threaded connection with the thread part. The needle seat of the biopsy needle stops by impacting the blocking part; the thread part is rotated to drive the gear shifting part and the blocking part to move in the needle inserting direction of the biopsy needle or in the reverse direction of the biopsy needle so as to adjust the excitation range of the biopsy needle. The thread part is rotated to drive the gear shifting part and the gear indicating part to move in the needle inserting direction or the reverse direction of the biopsy needle so as to indicate the excitation range distance of the biopsy needle. Stepless gear shifting can be achieved, the excitation range of the biopsy needle can be adjusted at will within the interval range, no position where impact stress is particularly concentrated exists on the gear shifting structure, excitation impact can be borne for many times, meanwhile, the excitation range distance of the biopsy needle can be indicated, and an operator can conveniently confirm the excitation distance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a file adjusting structure, a firing stopping assembly and an electric tube cutting needle. BACKGROUND

[0002] The file adjusting block of the existing biopsy needle can only be fixed at several positions (for example, three positions) to adjust the file, resulting in a limited adjustment range of the firing range of the biopsy needle. Moreover, the existing file adjusting block concentrates impact stress when impacted by the needle seat of the biopsy needle, and the position of the file adjusting block where the impact stress is concentrated is prone to fragmentation after multiple firings of the biopsy needle. In addition, the existing file adjusting block lacks an indication structure of the gear position when adjusting the file, which is not convenient for the operator to confirm the firing distance. SUMMARY

[0003] To solve the above technical problems, the present application provides a file adjusting structure, a firing stopping assembly and an electric tube cutting needle. The file adjusting structure can realize stepless file adjusting, so that the firing range of the biopsy needle can be adjusted arbitrarily within a range, and there is no position on the file adjusting structure where the impact stress is particularly concentrated, so that the file adjusting structure can withstand a larger number of firing impacts. In addition, the file adjusting structure can also indicate the firing range distance of the biopsy needle, which is convenient for the operator to confirm the firing distance.

[0004] The specific technical solutions provided by the present application are as follows: In a first aspect, a file adjusting structure is provided for adjusting the firing range of a biopsy needle, and includes a threaded portion, a file adjusting portion threadedly connected to the threaded portion, a gear position indicating portion provided on the file adjusting portion, and a blocking portion provided on the file adjusting portion. After the biopsy needle is fired, the needle seat of the biopsy needle stops by impacting the blocking portion. The threaded portion is rotated to drive the file adjusting portion and the blocking portion to move in the needle insertion direction of the biopsy needle or in the opposite direction to adjust the firing range of the biopsy needle. The threaded portion is rotated to drive the file adjusting portion and the gear position indicating portion to move in the needle insertion direction of the biopsy needle or in the opposite direction to indicate the firing range distance of the biopsy needle.

[0005] As a preferred embodiment of the above-mentioned solution, the file adjusting structure further includes an adjusting rod connected to the threaded portion and an adjusting knob provided on the adjusting rod. The adjusting knob is rotated to rotate the adjusting rod, and the adjusting rod drives the threaded portion to rotate.

[0006] As a preferred embodiment of the above-mentioned solution, the file adjusting structure further includes a bearing portion and a limiting portion provided on the adjusting rod. The ends of the adjusting rod and the threaded portion, which are away from each other, are respectively provided in the bearing portion, and the limiting portion is used to block and limit the file adjusting portion when the file adjusting portion moves.

[0007] As a preferred embodiment of the above-mentioned scheme, the blocking part comprises a bottom plate and a sliding groove part arranged on the bottom plate, the bottom plate is fixedly connected with the gear shifting part, the sliding groove part is arranged on the surface of the bottom plate opposite to the gear shifting part, the needle seat of the biopsy needle is slidingly arranged in the sliding groove part, and after the biopsy needle is activated, the needle seat of the biopsy needle stops by impacting the wall surface of the sliding groove part.

[0008] As a preferred embodiment of the above-mentioned scheme, the gear position indicating part comprises an extension bar arranged on the side wall of the bottom plate, an indicating block arranged on the extension bar away from the side wall of the bottom plate, and an indicating mark arranged on the indicating block, the indicating mark comprises an arrow or a triangle.

[0009] In the second aspect, a biopsy needle activation and stopping assembly is provided, comprising a biopsy needle, a needle seat of the biopsy needle, and the gear shifting structure as above, the biopsy needle comprises an outer needle and a cutting needle, the needle seat of the biopsy needle comprises an outer needle seat and a cutting needle seat, and the outer needle and the cutting needle are arranged in the outer needle seat and the cutting needle seat respectively. After the biopsy needle is activated, the outer needle seat and the cutting needle seat stop by impacting the corresponding parts of the blocking part in sequence.

[0010] As a preferred embodiment of the above-mentioned scheme, a locking tongue is formed on the side wall of the outer needle seat facing the cutting needle seat, a stop groove is formed on the cutting needle seat, and the locking tongue is slidingly arranged in the stop groove. After the biopsy needle is activated, the cutting needle seat stops by impacting the locking tongue through the stop groove. When the stop groove impacts the locking tongue and the locking tongue breaks, the cutting needle seat moves towards the blocking part and stops by impacting the blocking part.

[0011] As a preferred embodiment of the above-mentioned scheme, the locking tongue comprises a stop part and an extension part, one end of the extension part forms the stop part, the other end forms a circular arc part, and the circular arc part is formed on the side wall of the outer needle seat facing the cutting needle seat. The cutting needle seat further comprises an extension groove communicating with the stop groove and the side wall of the cutting needle seat facing the outer needle seat, the stop part is slidingly arranged in the stop groove, and the extension part is slidingly arranged in the extension groove.

[0012] In the third aspect, an electric tube cutting needle is provided, comprising a housing and the gear shifting structure as above or the biopsy needle activation and stopping assembly as above, the gear shifting structure and the needle seat of the biopsy needle are slidingly arranged in the housing, and the biopsy needle partially extends out of the housing. A first through groove in the shape of a long strip is formed on the outer wall of the housing, the gear position indicating part is slidingly arranged in the first through groove, an indicating mark of the activation range distance of the biopsy needle is arranged on the outer wall of the housing on one side of the first through groove, and the indicating mark cooperates with the gear position indicating part.

[0013] As a preferred embodiment of the above-mentioned scheme, a guide rail extending in the needle insertion direction of the biopsy needle is formed on the inner wall of the housing, a first protrusion is formed on the gear shifting part, and the first protrusion is slidingly arranged in the guide rail.

[0014] The file structure of the application is provided with a threaded part, a file part, a gear position indicating part and a blocking part, so that the file part is driven to move along the needle insertion direction of the biopsy needle or in the opposite direction by rotating the threaded part, and the blocking part is driven to move along the needle insertion direction of the biopsy needle or in the opposite direction by the file part; at the same time, after the biopsy needle is activated, the needle seat of the biopsy needle stops by impacting the blocking part, so that the activation range of the biopsy needle is increased after the blocking part moves along the needle insertion direction of the biopsy needle, and the activation range of the biopsy needle is reduced after the blocking part moves in the opposite direction of the needle insertion direction of the biopsy needle; the threaded connection structure can move the file part and the blocking part to any position within the interval range of the thread, so as to realize stepless file adjustment, and the activation range of the biopsy needle can be adjusted arbitrarily within the interval range; moreover, the file part does not need to cooperate with other structures for file adjustment, so that there is no position with particularly concentrated impact stress on the file structure, and the file structure can withstand a large number of activation impacts without being easily broken and damaged; at the same time, the file part can drive the gear position indicating part to move along the needle insertion direction of the biopsy needle or in the opposite direction, so that the activation range of the biopsy needle can be indicated, and the operator can confirm the activation distance.

[0015] The activation stopping assembly of the application is provided with a biopsy needle, a needle seat of the biopsy needle and a file structure, so that the needle seat and the cutting needle seat stop by impacting the blocking part in sequence after the biopsy needle is activated; the file part is driven to move along the needle insertion direction of the biopsy needle or in the opposite direction by rotating the threaded part, and the blocking part is driven to move along the needle insertion direction of the biopsy needle or in the opposite direction by the file part, so that the activation range of the outer needle and the cutting needle is increased after the blocking part moves along the needle insertion direction of the outer needle and the cutting needle, and the activation range of the outer needle and the cutting needle is reduced after the blocking part moves in the opposite direction of the needle insertion direction of the outer needle and the cutting needle; the threaded connection structure can move the file part and the blocking part to any position within the interval range of the thread, so as to realize stepless file adjustment, and the activation range of the outer needle and the cutting needle can be adjusted arbitrarily within the interval range; moreover, the file part does not need to cooperate with other structures for file adjustment, so that there is no position with particularly concentrated impact stress on the file structure, and the file structure can withstand a large number of activation impacts without being easily broken and damaged; at the same time, the file part can drive the gear position indicating part to move along the needle insertion direction of the outer needle and the cutting needle or in the opposite direction, so that the activation range of the outer needle and the cutting needle can be indicated, and the operator can confirm the activation distance.

[0016] The electric tube cutting needle of the application is provided with a file structure and a needle seat of a biopsy needle which are slidably arranged in a shell, and the biopsy needle partially extends out of the shell, so that the shell can isolate and protect the file structure and the needle seat of the biopsy needle; when the file part drives the gear position indicating part to move along the needle insertion direction of the outer needle and the cutting needle or in the opposite direction, the gear position indicating part slides along the first through slot, and after the file part stops moving, the gear position indicating part cooperates with the indication mark of the activation range of the biopsy needle on the outer wall of the shell on one side of the first through slot to indicate the activation range of the biopsy needle, so as to facilitate the operator to confirm the activation distance. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 A perspective view of a file structure from one angle according to an embodiment of the present application; Figure 2 A perspective view of a file structure from another angle according to an embodiment of the present application; Figure 3 A perspective view of an electric tube cutting needle according to an embodiment of the present application; Figure 4 A perspective view of an internal structure of an electric tube cutting needle according to an embodiment of the present application; Figure 5 A perspective view of an internal structure of an electric tube cutting needle according to an embodiment of the present application; Figure 4 A perspective view of an internal structure of an electric tube cutting needle according to an embodiment of the present application; Figure 6 A perspective view of an external needle seat and a cutting needle seat from one angle according to an embodiment of the present application; Figure 7 A perspective view of an external needle seat and a cutting needle seat from another angle according to an embodiment of the present application; Figure 8 A perspective view of an internal structure of a shell according to an embodiment of the present application; Figure 9 A perspective view of an external structure of a shell according to an embodiment of the present application.

[0019] In the above drawings, the following reference signs are used: Threaded part 11; gear shifting part 12; threaded through hole 121; second protrusion 122; first protrusion 123; gear position indicating part 13; extension bar 131; indicating block 132; indicating mark 133; blocking part 14; bottom plate 141; sliding groove part 142; first wall 143; second wall 144; avoiding 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-skid line 161; limiting part 17; first bearing 181; second bearing 182; outer needle seat 2; first base plate 21; base 22; first sliding seat 23; first impact wall 24; first arc surface wall 25; cutting needle needle seat 3; second base plate 31; second sliding seat 32; third impact wall 321; first inclined surface wall 322; cut-off groove 33; extension groove 34; arc surface part 35; lock tongue 4; cut-off part 41; extension part 42; circular arc part 43; shell 5; first through groove 51; indicating mark 52; guide rail 53; second through groove 54. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0021] 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 can be present therebetween. 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 can be present therebetween. The terms "vertical", "horizontal", "left", "right", "up", "down", "inner", "outer", "bottom", and the like used in the specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] Puncture biopsy is the main method for obtaining histopathological diagnosis of bone and soft tissue tumors. The puncture biopsy needle is generally used under the guidance of ultrasound and in cooperation with a puncture frame. Ultrasound images serve as a visual guide to help doctors insert the biopsy needle into the vicinity of the tumor tissue to be sampled, and then excite the biopsy needle to remove tissue from the tumor. The puncture frame can help the doctor keep the biopsy needle in the ultrasound plane so that the biopsy needle is always displayed in a linear shape on the ultrasound image. Puncture biopsy procedures are divided into side cutting and tube cutting. Tube cutting is to cut off the tissue inside the outer needle and take it out. Compared with the side cutting biopsy needle, the tube cutting needle can take more full tissue. The tube cutting puncture biopsy needle includes an inner needle, an outer needle and a cutting needle. The inner needle, the outer needle and the cutting needle are coaxially sleeved from inside to outside. The tube cutting principle of puncture biopsy is as follows: 1. The needle tip of the inner needle pierces into the tissue; 2. The outer needle and the cutting needle are excited, the needle end of the outer needle is in front, and the needle end of the cutting needle is in back. The outer needle extends out of the needle tip of the inner needle and cuts into the tissue through the blade, at which time the tissue enters the outer needle; 3. After the outer needle stops, the cutting needle continues to move forward, and a flexible cutting piece on the tip of the cutting needle extends into the outer needle from a through hole near the tip of the outer needle to cut off the tissue in the outer needle; 4. Finally, the inner needle, the outer needle and the cutting needle of the tube cutting are pulled out of the body, the cutting needle is retracted, and the tissue in the outer needle is pushed out through the inner needle.

[0023] As described in the background, the existing biopsy needle shift block can usually only be fixed at several positions, for example, in the patent document with publication number CN117398133A, a trapezoidal protrusion is arranged on the shift block, three trapezoidal clamping grooves are arranged on the shell, the shift block is slidingly arranged on the shell, and the positioning of the shift block is realized through the cooperation of the trapezoidal protrusion and the trapezoidal clamping groove, so that the shift block can only realize fixed shifting at three positions, which limits the adjustment range of the firing range of the biopsy needle and cannot meet more puncture biopsy needs. Moreover, the impact stress received by the shift block after the biopsy needle is excited is finally concentrated on the trapezoidal protrusion and the trapezoidal clamping groove, and after multiple excitations, the trapezoidal protrusion and the trapezoidal clamping groove are prone to fragmentation and damage. If the volume of these two components is increased, the fragmentation and damage condition can be improved to a certain extent, but the problem cannot be completely solved, and new problems such as difficult gear adjustment may be caused.

[0024] The shift structure of the present application can realize stepless shifting, so that the firing range of the biopsy needle can be adjusted arbitrarily within a range, and there is no position on the shift structure where the impact stress is particularly concentrated, so the shift structure can withstand a larger number of excitation impacts. In addition, the shift structure can also indicate the firing range distance of the biopsy needle, which is convenient for the operator to confirm the excitation distance.

[0025] Embodiment one The present application provides a shift structure, such as Figure 1 , Figure 2As shown in the drawings, the adjustment structure for adjusting the firing range of the biopsy needle comprises a threaded part 11, a gear part 12 threadedly connected with the threaded part 11, a gear position indicating part 13 arranged on the gear part 12, and a blocking part 14 arranged on the gear part 12. After the biopsy needle is fired, the needle seat of the biopsy needle stops by hitting the blocking part 14. The threaded part 11 can be a screw rod parallel to the needle insertion direction of the biopsy needle, and the gear part 12 can be a gear block, and a threaded hole 121 is formed on the gear block to cooperate with the threaded part 11.

[0026] The threaded part 11 is rotated to drive the gear part 12 and the blocking part 14 to move along the needle insertion direction of the biopsy needle or in the opposite direction to adjust the firing range of the biopsy needle. The threaded part 11 is rotated to drive the gear part 12 and the gear position indicating part 13 to move along the needle insertion direction of the biopsy needle or in the opposite direction to indicate the firing range distance of the biopsy needle.

[0027] As shown in the drawings, Figure 1 , Figure 2 The adjustment structure further comprises an adjustment rod 15 connected with the threaded part 11 and an adjustment knob 16 arranged on the adjustment rod 15. The adjustment knob 16 is rotated to rotate the adjustment rod 15, and the adjustment rod 15 drives the threaded part 11 to rotate. One end of the adjustment rod 15 is fixedly connected with the threaded part 11 and coaxially arranged with the threaded part 11. The adjustment knob 16 can be in the form of a roller, and a through hole (not shown) is formed in the center of the adjustment knob 16 to be fixedly sleeved on the adjustment rod 15. Anti-skid lines 161 can be formed on the outer surface of the adjustment knob 16.

[0028] As shown in the drawings, Figure 1 , Figure 2 The adjustment structure further comprises a bearing part and a limiting part 17 arranged on the adjustment rod 15. The ends of the adjustment rod 15 and the threaded part 11 away from each other are arranged in the bearing part, respectively. The limiting part 17 is used to block and limit the gear part 12 when the gear part 12 moves. The limiting part 17 can be a circular annular protrusion formed on the adjustment rod 15 on one side of the threaded part 11. The bearing part comprises a first bearing 181 and a second bearing 182. The ends of the adjustment rod 15 and the threaded part 11 away from each other are arranged in the first bearing 181 and the second bearing 182, respectively, so as to facilitate the rotation of the adjustment rod 15 and the threaded part 11. The adjustment knob 16 is fixedly sleeved on the adjustment rod 15 between the first bearing 181 and the limiting part 17. A second protrusion 122 can be formed on the gear part 12. When the gear part 12 moves along the threaded part 11, the second protrusion 122 cooperates with the limiting part 17 to block and limit the gear part 12, so as to limit the movement distance of the gear part 12 and facilitate the limitation of the gear interval.

[0029] As shown in the drawings, Figure 2As shown, the blocking part 14 includes a bottom plate 141 and a sliding groove part 142 arranged on the bottom plate 141, the bottom plate 141 is fixedly connected to the gear shifting part 12, the sliding groove part 142 is located on the side of the bottom plate 141 away from the gear shifting part 12, the needle seat of the biopsy needle is slidingly arranged in the sliding groove part 142, and after the biopsy needle is triggered, the needle seat of the biopsy needle stops by impacting the wall surface of the sliding groove part 142. The length direction of the bottom plate 141 and the sliding groove part 142 is consistent with the needle insertion direction. The sliding groove part 142 includes a pair of first walls 143 arranged oppositely and a second wall 144 connected between one end of the first walls 143, the first walls 143 and the second wall 144 are formed on the side wall of the bottom plate 141 away from the gear shifting part 12, the needle seat of the biopsy needle is slidingly arranged between the first walls 143, the second wall 144 and the bottom plate 141, and the second wall 144 is formed with an avoiding groove 145 for the biopsy needle to pass through.

[0030] As shown, Figure 2 The gear position indicating part 13 includes an extension bar 131 arranged on the side wall of the bottom plate 141, an indicating block 132 arranged on the side wall of the extension bar 131 away from the bottom plate 141, and an indicating mark 133 arranged on the indicating block 132, the indicating 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 bottom plate 141 between the gear shifting part 12 and the sliding groove part 142, and both ends of the extension bar 131 extend out of the bottom plate 141. The indicating block 132 can be fixed at the middle position of the extension bar 131, and the indicating mark 133 can be arranged at the middle of the side wall of the indicating block 132 away from the extension bar 131.

[0031] The gear shifting structure of the present application is provided with the threaded part 11, the gear shifting part 12, the gear position indicating part 13 and the blocking part 14, so that the gear shifting part 12 is driven to move along the needle insertion direction of the biopsy needle or in the opposite direction by rotating the threaded part 11, and the blocking part 14 is driven to move along the needle insertion direction of the biopsy needle or in the opposite direction by the gear shifting part 12. At the same time, after the biopsy needle is triggered, the needle seat of the biopsy needle stops by impacting the blocking part 14, so that the triggering range of the biopsy needle increases after the blocking part 14 moves along the needle insertion direction of the biopsy needle, and the triggering range of the biopsy needle decreases after the blocking part 14 moves in the opposite direction of the needle insertion direction of the biopsy needle. The threaded connection structure can make the gear shifting part 12 and the blocking part 14 move to any position within the interval range, so as to realize stepless gear shifting and adjust the triggering range of the biopsy needle within the interval range. Moreover, the threaded connection structure makes the gear shifting part 12 not need to cooperate with other structures for gear shifting, so that there is no position with concentrated impact stress on the gear shifting structure, and the gear shifting structure can withstand a large number of triggering impacts without being easily broken and damaged. At the same time, the gear shifting part 12 can drive the gear position indicating part 13 to move along the needle insertion direction of the biopsy needle or in the opposite direction, so as to indicate the triggering range of the biopsy needle, which is convenient for the operator to confirm the triggering distance.

[0032] Embodiment two The application provides a firing stop assembly, which comprises a biopsy needle (not shown), a needle seat of the biopsy needle and a gear shifting structure as in the first embodiment. Figure 4 、 Figure 5 The needle seat of the biopsy needle comprises an outer needle seat 2, a cutting needle seat 3 and an inner needle seat (not shown), and the outer needle, the cutting needle and the inner needle are arranged in the outer needle seat 2, the cutting needle seat 3 and the inner needle seat respectively. The cutting needle seat 3 and the outer needle seat 2 are located on a straight line parallel to the needle insertion direction and are arranged in sequence from near to far to the needle outlet end.

[0033] After the biopsy needle is fired, the outer needle seat 2 and the cutting needle seat 3 stop by hitting the corresponding parts of the blocking part 14 in sequence. As shown in Figure 2 、 Figure 7 , the corresponding parts of the blocking part 14 refer to the side wall of the rear end part of the first wall 143 in the reverse direction of the needle insertion direction and the side wall of the second wall 144 facing the first wall 143. The outer needle seat 2 comprises a first base plate 21, a base 22 formed on the first base plate 21 and a first sliding seat 23 formed on the base 22, and a first impact wall 24 and a first arc wall 25 connected with the first impact wall 24 are formed at the connection part of the base 22 and the first sliding seat 23, and the first impact wall 24 can be a straight wall. The side wall of the rear end part of the first wall 143 in the reverse direction of the needle insertion direction comprises a second impact wall 146 and a second arc wall 147 connected with the second impact wall 146, and the second impact wall 146 can be a straight wall. When the outer needle seat 2 hits, the first impact wall 24 hits the second impact wall 146, and the first arc wall 25 and the second arc wall 147 cooperate to realize buffering to reduce the shaking of the outer needle. The cutting needle seat 3 comprises a second base plate 31 and a second sliding seat 32 formed on the second base plate 31, and a third impact wall 321 and a first inclined wall 322 connected with the third impact wall 321 are formed on the side wall of the front end part of the second sliding seat 32 in the forward direction of the needle insertion direction, and the third impact wall 321 can be a straight wall. The side wall of the second wall 144 facing the first wall 143 comprises a fourth impact wall 148 and a second inclined wall 149 connected with the fourth impact wall 148, and the fourth impact wall 148 can be a straight wall. When the cutting needle seat 3 hits, the third impact wall 321 hits the fourth impact wall 148, and the first inclined wall 322 and the second inclined wall 149 cooperate to realize buffering to reduce the shaking of the cutting needle.

[0034] As shown in Figure 6As shown, the outer needle seat 2 is provided with a locking tongue 4 on the side wall facing the cutting needle seat 3, and the cutting needle seat 3 is provided with a stop groove 33, and the locking tongue 4 is slidingly arranged in the stop groove 33. After the biopsy needle is triggered, the outer needle seat 2 first hits the first wall 143 and stops, and the cutting needle seat 3 continues to move in the needle insertion direction by a certain distance under the action of inertia after the outer needle seat 2 stops, and stops by hitting the locking tongue 4 through the stop groove 33. If the locking tongue 4 breaks when the stop groove 33 hits the locking tongue 4, the cutting needle seat 3 continues to move in the needle insertion direction by a certain distance and stops by hitting the blocking part 14. In this way, even if the locking tongue 4 breaks, the cutting needle seat 3 can still be blocked from moving forward, preventing the cutting piece of the cutting needle from being broken and causing an accident.

[0035] As shown, Figure 6 The locking tongue 4 includes a stop part 41 and an extension part 42, one end of the extension part 42 forms the stop part 41, and the other end is provided with a circular arc part 43, and the circular arc part 43 is formed on the side wall of the outer needle seat 2 facing the cutting needle seat 3. The cutting needle seat 3 is also provided with an extension groove 34 communicating with the stop groove 33 and the side wall of the cutting needle seat 3 facing the outer needle seat 2, and the stop part 41 is slidingly arranged in the stop groove 33, and the extension part 42 is slidingly arranged in the extension groove 34. The extension groove 34 is formed with an arc surface part 35 at the connection with the side wall of the cutting needle seat 3 facing the outer needle seat 2, and the outer needle seat 2 and the cutting needle seat 3 are first wound before being triggered. When winding, the circular arc part 43 and the arc surface part 35 are abutted to enhance the synchronous movement effect of the matching between the outer needle seat 2 and the cutting needle seat 3. The outer needle seat 2 and the cutting needle seat 3 can be wound by the winding slider and the electric drive thereon in the related art, and can be triggered by the elastic member and the trigger connecting rod in the related art. Here, it will not be described again.

[0036] 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.

[0037] Example 3 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] While the preferred embodiments in the application have been described, additional modifications and changes can occur to those skilled in the art once they learn of the basic creative principles contained herein. Therefore, the above disclosure is intended to be taken as illustrative only and not as limiting the scope of the application. The appended claims are intended to cover all modifications and changes as fall within the true scope and spirit of the application.

[0044] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

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 insertion direction of the biopsy needle or in the opposite direction to indicate the excitation range distance of the biopsy needle.

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. An excitation stopping component, characterized in that, The biopsy needle includes a biopsy needle, a needle hub of the biopsy needle, and a gear adjustment structure as described in any one of claims 1-5. The biopsy needle includes an outer needle and a cutting needle. The needle hub of the biopsy needle includes an outer needle hub (2) and a cutting needle hub (3). The outer needle and the cutting needle are respectively disposed in the outer needle hub (2) and the cutting needle hub (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) one after the other.

7. The excitation stopping component according to claim 6, characterized in that, 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).

8. The excitation stop assembly according to claim 7, 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).

9. An electric tube cutting needle, characterized in that, Includes a housing (5) and an excitation stop assembly as described in any one of claims 6-8, wherein the adjustment structure and the needle seat of the biopsy needle are slidably disposed within the housing (5), and the biopsy needle 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).

10. The electric tube cutting needle according to claim 9, 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).

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