Rotary cutting biopsy needle transmission structure and mammary gland biopsy resection device

Abstract

The rotary-cut biopsy needle transmission structure comprises an outer sleeve of a linear structure, the tool bit end of the rotary-cut biopsy needle transmission structure coaxially penetrates through a rotary-cut tool tube in the outer sleeve, and the rotary-cut tool tube is in clearance fit with the outer sleeve; the hollow screw rod is coaxially and fixedly arranged at the position, away from the outer sleeve, of the rotary cutting knife tube in a sleeving mode, the hollow screw rod is coaxially sleeved with a linear driving gear, and the linear driving gear is in threaded fit with the hollow screw rod; one end of the hollow screw is coaxially sleeved with a rotary driving gear, and an inner pipe of the rotary driving gear is in sliding fit with the hollow screw in the axial direction of the rotary driving gear and is fixedly clamped with the hollow screw in the rotating direction of the rotary driving gear; during use, the linear driving gear rotates to drive the hollow screw rod and the rotary cutter pipe to linearly move along the axis of the hollow screw rod and the rotary cutter pipe; and the rotary driving gear rotates to drive the hollow screw rod and the rotary cutter pipe to rotate around own axes. The rotary cutting knife tube is driven to move in the mode, the structure is simple, transmission is stable, the operation risk can be reduced, and the operation success rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and further to a rotary biopsy needle transmission structure and a breast biopsy resection device. Background Art

[0002] In recent years, minimally invasive breast biopsy has become a commonly used treatment method for the diagnosis and treatment of suspicious breast lesions due to its characteristics of minimally invasive, high efficiency and few complications.

[0003] Clinically, the vacuum-assisted excision biopsy system is an important medical device in minimally invasive breast biopsy surgery, which is mainly composed of a main unit, a biopsy surgical device and a vacuum negative pressure system. During specific diagnosis and treatment, with the guidance of imaging equipment (such as B-ultrasound), the biopsy needle of the biopsy surgical device is punctured to the surgical site, and then the motor controls the rotary cutting inner needle to perform a rotating swinging knife and reciprocating feeding motion, so that the rotary cutting inner needle can partially or completely excise the lesion tissue; then, the vacuum negative pressure system is used to transport the cut tissue sample to the outside; the doctor performs pathological testing on the obtained tissue sample and makes a diagnosis of the patient's condition. At present, the conventional biopsy surgical devices on the market usually have a complex transmission structure for the rotary swinging knife and reciprocating feeding motion of the rotary cutting inner needle, and are controlled by a single motor.

[0004] In this regard, the inventor believes that the rotary cutting inner needle on the existing biopsy surgical device has a complex transmission structure, which makes its transmission reliability poor, the corresponding biopsy operation process has a greater risk, and the success rate of the operation is low, and there is room for improvement. Utility Model Content

[0005] The purpose of the present application is to provide a rotary biopsy needle transmission structure and a breast biopsy resectoscope, so as to simplify the transmission structure of the rotary cutting inner needle, thereby improving its transmission reliability, reducing the risk of biopsy surgery, and improving the success rate of the surgery.

[0006] The technical solutions provided by this application are as follows:

[0007] A rotary biopsy needle transmission structure, comprising:

[0008] The rotary cutter tube is a linear structure, and a cutter head is formed at one end;

[0009] A hollow screw, wherein the hollow screw coaxially fixed sleeve is arranged at a position of the rotary cutting blade tube away from the blade head end, and the coaxial sleeve on the hollow screw is provided with a linear drive gear, and the linear drive gear is threadedly matched with the hollow screw; a coaxial sleeve at one end of the hollow screw is provided with a rotary drive gear, and the inner tube of the rotary drive gear is slidably matched with the hollow screw along its own axial direction, and is fixedly engaged with the hollow screw around its own rotation direction;

[0010] When in use, the linear drive gear rotates to drive the hollow screw and the rotary cutter tube to move linearly along their own axes; the rotary drive gear rotates to drive the hollow screw and the rotary cutter tube to rotate around their own axes.

[0011] The present application provides a rotary cutting biopsy needle transmission structure. In clinical applications, the blade head end of the rotary cutting knife tube is coaxially inserted into the outer sleeve, and an electrical device is used to control the linear drive gear to rotate forward, driving the rotary cutting knife tube to advance in a straight line along its own axis; at this time, if another electrical device is used to control the rotary drive gear to rotate in the opposite direction, the rotary cutting knife tube is driven to accelerate the rotation and advance; similarly, the electrical device is used to control the linear drive gear to reverse, driving the rotary cutting knife tube to retreat in a straight line; at this time, if another electrical device is used to control the rotary drive gear to rotate forward, the rotary cutting knife tube is driven to accelerate the rotation and retreat; medical staff perform control operations according to actual needs to complete the corresponding minimally invasive breast biopsy surgery process.

[0012] In this way, with the help of a linear drive gear and a rotary drive gear sleeved on the hollow screw, the hollow screw is controlled to perform linear motion and rotary motion respectively, thereby realizing the stepless feed, rotary cutting and retracting operations of the rotary cutting knife tube. The rotary cutting knife tube has a simple transmission structure, convenient control and strong transmission reliability, which helps to reduce the probability of unknown risks in biopsy surgery and improve the success rate of the surgery.

[0013] In some embodiments, a connecting ring is coaxially formed at one end of the hollow screw, and one end of the hollow screw forming the connecting ring extends into the inner tube of the rotary drive gear;

[0014] The outer circular surface of the connecting ring is provided with a sliding groove along the axial direction of the hollow screw; the tube wall of the inner tube of the rotary drive gear is provided with a sliding rod extending along its own axial direction, the sliding rod and the sliding groove are arranged correspondingly, the sliding rod is embedded in the sliding groove, and slides and cooperates with the inner wall of the sliding groove along the axis of the hollow screw.

[0015] Through the transmission structure of a rotary biopsy needle provided by the present application, due to the cooperation of the sliding rod and the sliding groove, in clinical applications, when the linear drive gear rotates forward, the hollow screw rod performs reciprocating linear motion along its own axis, driving the rotary cutter tube to advance linearly; if the rotary drive gear is driven to reverse at the same time, the rotary drive gear drives the hollow screw rod to rotate synchronously around its own axis, so that the rotary cutter tube performs a rotary feed action; the same is true when the linear drive gear reverses and the rotary drive gear rotates forward; with the help of the sliding cooperation of the sliding rod and the sliding groove along the axis of the hollow screw rod, and the clamping cooperation around the axis of the hollow screw rod, the linear drive and rotary drive of the rotary cutter tube are realized at the same time, the structure is simple, the control is convenient, the transmission process is stable and reliable, the risk of biopsy surgery is effectively reduced, and the success rate of surgery is improved. At the same time, the inner wall of the hollow screw rod and the rotary drive gear are supported by a connecting ring, and the supporting structure is simple and stable, which helps to further improve the safety of the biopsy surgery process.

[0016] In some embodiments, the inner tube of the rotary drive gear has a support ring extending radially inwardly, and the hollow screw is slidably matched with the inner wall of the support ring along its own axis;

[0017] An extension tube is coaxially arranged at one end of the rotary drive gear close to the cutter head end, and the slide rod is formed on the inner wall of the extension tube.

[0018] A rotary biopsy needle transmission structure provided by the present application is provided with an extension tube that cooperates with a support ring, which helps to reduce the size of the rotary drive gear; at the same time, the hollow screw is supported by the support ring and the slide rod, which has a simple structure and is easy to manufacture, effectively reducing the production difficulty of the rotary biopsy needle transmission structure, thereby saving the company's production costs.

[0019] In some embodiments, the linear drive gear is arranged at the end of the rotary drive gear away from the extension tube, and an end tube is provided at the end of the linear drive gear close to the rotary drive gear; the end tube coaxially extends into the inner tube of the rotary drive gear and rotates with the rotary drive gear around its own axis; the end of the end tube away from the linear drive gear abuts against the end wall of the support ring.

[0020] A rotary biopsy needle transmission structure provided by the present application utilizes the rotational cooperation between the end tube and the inner tube of the rotary drive gear to achieve a rotational connection between the rotary drive gear and the linear drive gear, which helps to improve the compactness of the rotary biopsy needle transmission structure. The structure is simple and easy to manufacture, which helps to further reduce the production costs of enterprises.

[0021] In some embodiments, it further comprises an outer sleeve, wherein the outer sleeve is a linear structure;

[0022] The rotary cutting blade tube is coaxially arranged in the outer sleeve, and the outer wall of the blade head end is slidably matched with the inner wall of the outer sleeve along the axial direction of the rotary cutting blade tube; and the matching relationship between the blade head end and the outer sleeve is a tight fit;

[0023] A knife tip is provided at one end of the outer sleeve away from the rotary cutting inner tube. The knife tip is fixedly embedded in the outer sleeve, and the outer wall of the knife tip is smoothly connected to the outer wall of the outer sleeve.

[0024] Through the rotary cutting biopsy needle transmission structure provided by the present application, the blade head end and the inner wall of the outer sleeve are set to be tightly matched, so that the blade head end of the rotary cutting blade tube can cut off the corresponding lesion tissue during the operation; the blade tip and the outer sleeve are smoothly connected, which makes it convenient for the sampling end of the outer sleeve to smoothly penetrate the breast tissue, helping to reduce surgical wounds and reduce patient pain.

[0025] In some embodiments, a vacuum groove is provided at one end of the outer sleeve close to the blade tip, and a plurality of air holes are provided on the outer sleeve at positions corresponding to the bottom wall of the vacuum groove;

[0026] The outer wall of the outer sleeve where the air hole is opened is provided with an air guide chamber, and the air guide chamber is connected with the vacuum groove through the air hole; the air guide chamber extends axially away from one end of the blade tip along the outer sleeve, and then is connected with an external negative pressure system.

[0027] In some embodiments, a connecting ring is fixedly provided on the end of the outer sleeve away from the blade tip, and a branch pipe is provided on the side of the connecting ring radially corresponding to the air guide bin. The branch pipe is connected to the end of the air guide bin away from the vacuum groove and is connected to the air pipe of the external negative pressure system.

[0028] Through the rotary biopsy needle transmission structure provided in the present application, the air guide chamber is connected to the trachea of ​​the negative pressure system with the help of a branch pipe on the connecting ring. It has a simple structure and is easy to manufacture, which helps to further reduce the production costs of the enterprise.

[0029] In some embodiments, a support collar is coaxially fixed to one end of the inner wall of the connecting collar away from the outer sleeve, and the inner circular surface of the support collar is slidably matched with the outer circular surface of the rotary cutter tube along the axial direction of the rotary cutter tube.

[0030] Through the rotary cutting biopsy needle transmission structure provided by the present application, the support ring is used to support the rotary cutting knife tube to ensure the coaxial clearance fit between the outer sleeve and the rotary cutting knife tube, thereby improving the smoothness of the rotary cutting knife tube in the process of advancing and retracting the knife, and further improving the stability of the rotary cutting biopsy needle during use.

[0031] In some embodiments, a blood guide groove is formed along the axial direction of the outer sleeve at the connection between the outer wall of the outer sleeve and the outer wall of the air guide chamber.

[0032] Through the rotary biopsy needle transmission structure provided by the present application, after the blade tip is embedded in the patient's breast tissue, as the outer sleeve goes deeper, the blood flowing out of the wound flows out through the blood guide groove, effectively ensuring the smoothness of the outer sleeve when the blade is inserted.

[0033] On the other hand, a breast biopsy resection device is provided, comprising any of the above-mentioned rotary cutting biopsy needle transmission structures, and also comprising a housing, wherein the end of the rotary cutting blade tube away from the blade head end, the hollow screw, the linear drive gear and the rotary drive gear are all installed in the housing;

[0034] An operation window is provided on the shell, and the teeth of the linear drive gear and the teeth of the rotary drive gear both extend out of the installation space from the operation window.

[0035] In some embodiments, an extension tube is coaxially arranged at one end of the rotary drive gear close to the cutter head end, and a slide rod is formed on the inner wall of the extension tube along its own axis;

[0036] A connecting ring is formed at one end of the hollow screw, and a sliding groove is formed on the outer circumference of the connecting ring corresponding to the sliding rod; the connecting ring is coaxially embedded in the extension tube, and the sliding rod is correspondingly embedded in the sliding groove, and slides and cooperates with the inner wall of the sliding groove along the axis of the hollow screw;

[0037] The outer wall of the extension tube is formed with a limit rod along its own axial direction, and a U-shaped bracket for fixing the extension tube is opened on the upper shell, and the opening of the U-shaped bracket is arranged toward the lower shell. When the axis of the rotating drive gear rotates, the limit rod swings synchronously and respectively abuts against the two end walls of the U-shaped bracket opening.

[0038] A breast biopsy resection device provided by the present application has a limit rod arranged on the extension tube, and the limit rod abuts against the two end surfaces of the U-shaped bracket to limit the swing range of the rotary cutting knife tube. The structure is simple, the manufacturing is convenient, and the manufacturing cost of the enterprise is effectively saved.

[0039] Compared with the prior art, the rotary biopsy needle transmission structure and breast biopsy resection device provided by the present application have at least one of the following beneficial effects:

[0040] 1. A hollow screw is coaxially fixedly sleeved on the rotary cutter tube, and a linear drive gear and a rotary drive gear are coaxially sleeved on the hollow screw. The linear drive gear and the thread of the hollow screw are matched to realize the linear drive of the rotary cutter tube, and the rotary drive of the rotary cutter tube is realized by the clamping match of the rotary drive gear around the axis of the hollow screw and the hollow screw; the linear drive gear and the rotary drive gear are driven to rotate at the same time, so as to realize the linear and rotary drive of the hollow screw and the rotary feed and rotary retract operations of the rotary cutter tube; the rotary cutter tube has a simple transmission structure, convenient control, and strong transmission reliability, which helps to reduce the probability of unknown risks in biopsy surgery and improve the success rate of surgery;

[0041] 2. With the help of the sliding cooperation between the slide bar and the slide groove along the axis of the hollow screw, and the clamping cooperation around the axis of the hollow screw, the linear drive and rotation drive of the rotary cutter tube are realized at the same time, with a simple structure, convenient control, and stable and reliable transmission process; at the same time, the inner wall of the hollow screw and the rotary drive gear are supported by a connecting ring, with a simple and stable structure, which helps to further improve the safety of the biopsy operation process;

[0042] 3. Use a U-shaped bracket to support the extension tube, and form a limit rod on the outer wall of the extension tube. Use the side wall of the limit rod to abut against the two end walls of the U-shaped bracket opening to limit the swing range of the rotary cutter tube. The limit structure is simple, easy to produce, and effectively saves the company's production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present solution.

[0044] Figure 1 This is an axonometric diagram of the overall structure of the breast biopsy resection device mainly embodied in the embodiment of the present application;

[0045] Figure 2 It is an axonometric schematic diagram of the embodiment of the present application mainly showing the overall coordination mode of the rotary biopsy needle transmission structure;

[0046] Figure 3 This is an axonometric diagram of the overall structure of the rotary cutting blade tube according to the embodiment of the present application;

[0047] Figure 4 This is a side view of the overall structure of the rotary biopsy needle transmission structure mainly embodied in the embodiment of the present application;

[0048] Figure 5 yes Figure 4 The cross-sectional view along the AA axis is mainly used to illustrate the coordination relationship between the various parts of the rotary biopsy needle transmission structure;

[0049] Figure 6It is a partial enlarged view of the location of the air hole in the embodiment of the present application;

[0050] Figure 7 It is an axonometric schematic diagram of the overall structure of the hollow screw rod mainly embodied in the embodiment of the present application;

[0051] Figure 8 It is a schematic diagram of the exploded structure of the embodiment of the present application, which mainly reflects the setting position of the U-shaped bracket.

[0052] Description of reference numerals:

[0053] 1. Outer sleeve; 11. Knife tip; 12. Vacuum groove; 13. Air hole; 14. Air guide chamber; 15. Blood guide groove; 2. Peeling knife tube; 21. Knife head end; 211. Elastic groove; 3. Hollow screw; 31. Connecting ring; 311. Slide groove; 4. Linear drive gear; 41. End tube; 5. Rotary drive gear; 51. Extension tube; 511. Slide rod; 512. Limit rod; 52. Support ring; 6. Connecting collar; 61. Branch pipe; 62. Support collar; 7. Shell; 71. Upper shell; 711. Operation window; 72. Lower shell; 73. U-shaped bracket. DETAILED DESCRIPTION

[0054] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0055] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0056] In one embodiment, referring to the accompanying drawings of the specification Figure 1 to Figure 2The cam 2 is a linear structure, one end of which is provided with a cutter head 21; a hollow screw 3 is coaxially sleeved on the position of the cutter tube 2 axially away from its own cutter head end 21, and the hollow screw 3 is fixedly connected to the cutter tube 2; at the same time, it also includes a linear driving gear 4 and a rotary driving gear 5, wherein the linear driving gear 4 is coaxially sleeved on the hollow screw 3 and threadedly matched with the hollow screw 3; when working, the linear driving gear 4 is driven to rotate, driving the hollow screw 3 and the cutter tube 2 to linearly displace along their own axis; the rotary driving gear 5 is coaxially sleeved on one end of the hollow screw 3, and slidingly matched with the hollow screw 3 around its own axis; and the rotary driving gear 5 is fixedly clamped with the hollow screw 3 around its own rotation direction, so that while rotating itself, it drives the hollow screw 3 and the cutter tube 2 to rotate synchronously.

[0057] In clinical applications, when a minimally invasive breast biopsy is performed, when the vacuum groove 12 end of the outer sleeve 1 extends to the side of the lesion, the lesion tissue enters the vacuum groove 12 under the adsorption of the external negative pressure system, and the linear drive gear 4 is controlled by an electrical device to rotate forward, driving the rotary cutter tube 2 to feed linearly along its own axis; at the same time, another electrical device is used to control the rotary drive gear 5 to rotate in the opposite direction, thereby driving the rotary cutter tube 2 to accelerate the linear feed and rotate the swing knife, so that the rotary cutter tube 2 performs rotary cutting on the lesion tissue in the vacuum groove 12; when the rotation speed of the rotary drive gear 5 slows down, the rotary cutter tube 2 rotates backward, and the rotary cutter tube 2 rotates backward. The cutting action is decelerated; and when the rotary cutting knife tube 2 cuts the lesion tissue, the lesion tissue enters the rotary cutting knife tube 2 and is collected in the sample collector connected to the tail end of the rotary cutting knife tube 2 along the axial direction of the rotary cutting knife tube 2 under the adsorption of the external negative pressure system; at this time, the electrical equipment controls the linear drive gear 4 to reverse, driving the rotary cutting knife tube 2 to retreat along its own axis in a straight line; of course, another electrical equipment can also be used to control the rotation drive gear 5 to rotate forward, driving the rotary cutting knife tube 2 to rotate and swing the knife and accelerate the retreat, so that the rotary cutting knife tube 2 is separated from the vacuum groove 12, waiting for the next round of rotary cutting sampling action.

[0058] By rotating the linear drive gear 4 and the rotary drive gear 5 sleeved on the hollow screw 3, the hollow screw 3 is driven to perform linear motion and rotational motion respectively, thereby driving the rotary cutting knife tube 2 to perform stepless advance and retract operations. The rotary cutting knife tube 2 has a simple transmission structure, strong transmission stability, and easy operation, which effectively reduces the probability of unknown risks in the biopsy operation, improves the safety of the biopsy operation process, and effectively guarantees the success rate of the corresponding operation.

[0059] In one embodiment, based on the above embodiment, specifically, referring to Figures 1 to 3The transmission structure of the rotary cutting biopsy needle also includes an outer sleeve 1, which is also a linear structure. The blade end 21 of the rotary cutting blade tube 2 is coaxially inserted into the outer sleeve 1, and the outer wall of the blade end 21 slides and cooperates with the inner wall of the outer sleeve 1 along the axial direction of the rotary cutting blade tube 2; in this embodiment of the present application, in order to ensure that the blade end 21 quickly cuts off the corresponding lesion tissue, the opening end of the blade end 21 is slightly flared, and the outer diameter of the blade end 21 is slightly larger than the outer diameter of the end of the rotary cutting blade tube 2 away from the blade end 21, and is also slightly larger than the inner diameter of the outer sleeve 1; of course, the inner diameter of the outer sleeve 1 is also slightly larger than the outer diameter of the end of the rotary cutting blade tube 2 away from the blade end 21; and, an elastic groove 211 is provided through any radial position of the blade end 21. Refer to Figure 1 In this embodiment of the present application, the end of the outer sleeve 1 that is away from the rotary cutting inner tube is detachably mounted with a knife tip 11, and the end of the knife tip 11 that is away from its tip is fixedly embedded in the outer sleeve 1. During assembly, firstly, the end of the rotary cutting knife tube 2 that is away from its own cutter head end 21 is inserted into the outer sleeve 1 from the end of the outer sleeve 1 where the knife tip 11 is mounted, and slides relative to the outer sleeve 1 along its own axial direction until the tail end of the knife tip end 21 enters the outer sleeve 1; then, the rotary cutting knife tube 2 and the outer sleeve 1 are continuously pushed in the same direction, and due to the squeezing effect of the inner wall of the outer sleeve 1, the knife tip end 21 as a whole shrinks toward the elastic groove 211, so that the knife tip end 21 enters the outer sleeve 1 completely, and the outer wall of the knife tip end 21 and the inner wall of the outer sleeve 1 are tightly matched; then, the knife tip 11 is installed on the outer sleeve 1.

[0060] During the biopsy operation, the lesion tissue is clamped between the blade head of the rotary cutting blade tube 2 and the end of the blade tip 11 away from the tip thereof, and the rotary cutting blade tube 2 performs a rotational feeding motion to cut off and aspirate the lesion tissue. At the same time, in this embodiment of the present application, the outer wall of the blade tip 11 is smoothly connected to the outer wall of the outer sleeve 1, so that the outer sleeve 1 is smoothly introduced into the breast tissue.

[0061] At the same time, refer to Figures 1 to 6 , a square hole is provided at one end of the side wall of the outer sleeve 1 near the blade tip 11, so that a vacuum groove 12 is formed at a corresponding position in the outer sleeve 1; in this embodiment of the present application, in order to connect the vacuum groove 12 to an external negative pressure system, an air hole 13 is provided at the side wall of the outer sleeve 1 corresponding to the bottom wall of the vacuum groove 12, and a plurality of air holes 13 are evenly spaced; an air guide bin 14 is provided on the side wall of the outer sleeve 1 where the air hole 13 is provided, one end of the air guide bin 14 is connected to the vacuum groove 12 through the air hole 13, and the other end extends axially toward the end of the outer sleeve 1 away from the blade tip 11. In addition, a connecting collar 6 is fixedly provided at one end of the outer sleeve 1 away from the blade tip 11, and a branch pipe 61 is provided at one side of the connecting collar 6 radially corresponding to the air guide bin 14, and the branch pipe 61 is connected to the end of the air guide bin 14 away from the vacuum groove 12, and is connected to the air pipe of the external negative pressure system, so that the air guide bin 14 is connected to the external negative pressure system.

[0062] Reference Figure 1 and Figure 6 A blood guide groove 15 is formed along the axial direction of the outer sleeve 1 at the connection between the outer wall of the outer sleeve 1 and the outer wall of the air guide chamber 14; during the biopsy operation, after the knife tip 11 is embedded in the patient's breast tissue, as the outer sleeve 1 penetrates deeper, the blood flowing out of the wound flows out through the blood guide groove 15, thereby improving the smoothness of the outer sleeve 1 when cutting.

[0063] Moreover, refer to Figure 5 and Figure 6 A supporting collar 62 is coaxially arranged at one end of the inner wall of the connecting collar 6 away from the blade tip 11, and the outer cylindrical surface of the supporting collar 62 is fixedly connected to the inner wall of the connecting collar 6; during assembly, after the rotary cutting knife tube 2 is inserted into the outer sleeve 1, the outer cylindrical surface of the rotary cutting knife tube 2 slides and cooperates with the inner cylindrical surface of the supporting collar 62 along the axial direction of the rotary cutting knife tube 2; on the one hand, the supporting collar 62 is used to support the end of the rotary cutting knife tube 2 close to the outer sleeve 1 to ensure the coaxiality of the rotary cutting knife tube 2 and the outer sleeve 1, and improve the smoothness of the feeding movement of the rotary cutting knife tube 2; on the other hand, the supporting collar 62 is used to seal the end of the outer sleeve 1 away from the blade tip 11, thereby effectively ensuring the sealing of the inner cavity of the rotary cutting knife tube 2, thereby maintaining the negative pressure environment in the vacuum groove 12 during the operation.

[0064] Further, see Figure 2 , Figure 5 and Figure 7 In this embodiment of the present application, a connecting ring 31 is coaxially formed at one end of the hollow screw 3, and the radial dimension of the connecting ring 31 is larger than the radial dimension of the hollow screw 3; in order to ensure the stable cooperation between the hollow screw 3 and the inner tube of the rotating drive gear 5 along its own axial direction, a sliding groove 311 is provided on the outer circumferential surface of the connecting ring 31 along its own axial direction, and the sliding groove 311 runs through the two axial ends of the connecting ring 31; at the same time, an extension tube 51 is coaxially arranged at one end of the rotating drive gear 5 close to the outer sleeve 1, and a sliding rod 511 is extended on the inner wall of the extension tube 51 along its own axial direction, and the sliding rod 511 corresponds to the sliding groove 311 one by one; after assembly, the hollow screw 3 One end of the rod 3 forming connecting ring 31 extends into the extension tube 51, and the sliding rod 511 is embedded in the corresponding sliding groove 311; when the linear driving gear 4 rotates, the sliding rod 511 slides relative to the inner wall of the sliding groove 311 along its own length direction, and correspondingly, the hollow screw 3 makes a linear reciprocating motion along its own axis, and drives the rotary cutting knife tube 2 to advance or retreat in a linear manner; if the rotary driving gear 5 is driven to rotate in the opposite direction relative to the linear driving gear 4 at the same time, the rotary driving gear 5 drives the hollow screw 3 to rotate synchronously around its own axis, and drives the rotary cutting knife tube 2 to perform a rotational feed or rotational retreat action, thereby completing the transmission operation of the rotary cutting knife tube 2.

[0065] In addition, refer to Figure 5 The inner tube of the rotating driving gear 5 has a support ring 52 extending radially inwardly, and the hollow screw 3 slides along its own axis and cooperates with the inner wall of the support ring 52 to support the end of the hollow screw 3 away from the connecting ring 31.

[0066] In addition, refer to Figure 2 and Figure 4 In this embodiment of the present application, in order to maintain the overall stability of the transmission structure and improve the compactness of the structure, the linear drive gear 4 is arranged at the end of the rotary drive gear 5 away from the extension tube 51; and, end tubes 41 are extended at both axial ends of the linear drive gear 4, and the end tube 41 close to one end of the rotary drive gear 5 coaxially extends into the inner tube of the rotary drive gear 5, and is rotatably connected to the rotary drive gear 5 around its own axis, and its end wall abuts against the end of the support ring 52 axially close to the linear drive gear 4.

[0067] In one embodiment, a breast biopsy resection device is based on the above embodiment, specifically, referring to Figures 1 to 4 , including the rotary cutting biopsy needle transmission structure described in the above embodiment, and also including an upper shell 71 and a lower shell 72. After the upper shell 71 and the lower shell 72 are buckled together, a shell 7 for installing the above rotary cutting biopsy needle transmission structure is formed; at the same time, an operation window 711 is also opened in the middle of the upper shell 71; during assembly, the end of the rotary cutting blade tube 2 away from the outer sleeve 1, the hollow screw 3, the linear drive gear 4 and the rotary drive gear 5 are all installed in the installation space of the shell 7, and the teeth of the linear drive gear 4 and the teeth of the rotary drive gear 5 are both extended out of the installation space from the operation window 711, so that the corresponding electrical equipment can drive the two.

[0068] In addition, refer to Figure 8 , U-shaped brackets 73 are provided on both the upper shell 71 and the lower shell 72, and a plurality of U-shaped brackets 73 are provided at intervals along the length direction of the shell 7, and the extension tube 51 is fixed in the installation space by the U-shaped brackets 73 provided on the upper shell 71 and the lower shell 72 respectively. In this embodiment of the present application, the outer wall of the extension tube 51 is formed with a limit rod 512 along its own axial direction, and the limit rod 512 is provided corresponding to one of the U-shaped brackets 73 and is located on the side of the extension tube 51 away from the corresponding U-shaped bracket 73; when in use, when the electrical equipment drives the rotary drive gear 5 to rotate around its own axis, the limit rod 512 swings synchronously with the rotary drive gear 5 until its side walls on both sides of the feeding direction of the rotary cutter tube 2 abut against the two end walls of the opening end of the corresponding U-shaped bracket 73, thereby limiting the swing range of the rotary cutter tube 2.

[0069] The implementation principle of the embodiment of the present application is as follows: in clinical applications, when a minimally invasive breast biopsy is performed, when the vacuum groove 12 end of the outer sleeve 1 extends to the side of the lesion, the lesion tissue enters the vacuum groove 12 under the adsorption action of the external negative pressure system, and an electrical device is used to control the linear drive gear 4 to rotate forward. At the same time, another electrical device is used to drive the rotary drive gear 5 to rotate in the opposite direction until the side wall of the limit rod 512 abuts against the corresponding end wall of the opening end of the U-shaped bracket 73, thereby driving the rotary cutter tube 2 to accelerate the rotation and feed, so that the rotary cutter tube 2 performs rotary cutting on the lesion tissue in the vacuum groove 12; when the rotary drive gear 5 and / or After the rotation speed of the linear drive gear 4 slows down, the peeling action slows down; and when the peeling knife tube 2 cuts the lesion tissue, the lesion tissue enters the peeling knife tube 2 and is collected in the sample collector connected to the tail end of the peeling knife tube 2 along the axial direction of the peeling knife tube 2 under the adsorption of the external negative pressure system; thereafter, the electrical equipment controls the linear drive gear 4 to reverse, driving the peeling knife tube 2 to retreat along its own axis in a straight line; of course, another electrical equipment can also be used to control the forward rotation of the rotary drive gear 5, driving the peeling knife tube 2 to rotate and swing the knife and accelerate the retreat, so that the peeling knife tube 2 is separated from the vacuum groove 12 and waits for the next round of peeling sampling action.

[0070] This method is used to drive the rotary cutting knife tube 2 to advance, cut and retract the knife steplessly. The driving structure is simple, the control is convenient, and the transmission reliability is strong. It effectively reduces the probability of unknown risks in the biopsy operation, improves the safety of the biopsy operation process, and improves the success rate of the biopsy operation.

[0071] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A rotary biopsy needle transmission structure, characterized in that: include; The rotary cutter tube is a linear structure, and a cutter head is formed at one end; A hollow screw, wherein the hollow screw is coaxially fixedly sleeved at a position of the rotary cutting blade tube away from the blade head end, and a linear drive gear is coaxially sleeved on the hollow screw, and the linear drive gear is threadedly matched with the hollow screw; a rotary drive gear is coaxially sleeved at one end of the hollow screw, and the inner tube of the rotary drive gear is slidably matched with the hollow screw along its own axial direction, and is fixedly engaged with the hollow screw around its own rotation direction; When in use, the linear drive gear rotates to drive the hollow screw and the rotary cutter tube to move linearly along their own axes; the rotary drive gear rotates to drive the hollow screw and the rotary cutter tube to rotate around their own axes.

2. The rotary biopsy needle transmission structure according to claim 1, characterized in that: A connecting ring is coaxially formed at one end of the hollow screw, and one end of the hollow screw forming the connecting ring extends into the inner tube of the rotary drive gear; The outer circumferential surface of the connecting ring is provided with a slide groove along the axial direction of the hollow screw; the tube wall of the inner tube of the rotary drive gear is provided with a slide rod extending along its own axial direction, the slide rod and the slide groove are arranged correspondingly, the slide rod is embedded in the slide groove, and slides and cooperates with the inner wall of the slide groove along the axis of the hollow screw; The inner tube of the rotary drive gear is provided with a support ring extending radially inwardly, and the hollow screw is slidingly matched with the inner wall of the support ring along its own axis; An extension tube is coaxially arranged at one end of the rotary drive gear close to the cutter head end, and the slide rod is formed on the inner wall of the extension tube.

3. The rotary biopsy needle transmission structure according to claim 2, characterized in that: The linear drive gear is arranged at the end of the rotary drive gear away from the extension tube, and an end tube is provided at the end of the linear drive gear close to the rotary drive gear; the end tube coaxially extends into the inner tube of the rotary drive gear and rotates with the rotary drive gear around its own axis; the end of the end tube away from the linear drive gear abuts against the end wall of the support ring.

4. A rotary biopsy needle transmission structure according to any one of claims 1 to 3, characterized in that: It also includes an outer sleeve, which is in a linear structure; The rotary cutting blade tube is coaxially arranged in the outer sleeve, and the outer wall of the blade head end is slidably matched with the inner wall of the outer sleeve along the axial direction of the rotary cutting blade tube; And, the matching relationship between the blade end and the outer sleeve is a tight fit; A knife tip is arranged at one end of the outer sleeve away from the rotary cutting knife tube. The knife tip is fixedly embedded in the outer sleeve, and the outer wall of the knife tip is smoothly connected to the outer wall of the outer sleeve.

5. The rotary biopsy needle transmission structure according to claim 4, characterized in that: A vacuum groove is formed at one end of the outer sleeve close to the knife tip, and a plurality of air holes are formed on the outer sleeve at positions corresponding to the bottom wall of the vacuum groove; The outer wall of the outer sleeve where the air hole is opened is provided with an air guide chamber, and the air guide chamber is connected with the vacuum groove through the air hole; the air guide chamber extends axially away from one end of the blade tip along the outer sleeve, and then is connected with an external negative pressure system.

6. The rotary biopsy needle transmission structure according to claim 5, characterized in that: A connecting ring is fixedly sleeved on one end of the outer sleeve away from the blade tip, and a branch pipe is provided on a side of the connecting ring radially corresponding to the air guide bin. The branch pipe is communicated with one end of the air guide bin away from the vacuum groove and is connected to the air pipe of the external negative pressure system.

7. The rotary biopsy needle transmission structure according to claim 6, characterized in that: A supporting collar is coaxially fixed to one end of the inner wall of the connecting collar away from the knife tip, and the inner circumferential surface of the supporting collar is slidably matched with the outer circumferential surface of the rotary cutter tube along the axial direction of the rotary cutter tube.

8. The rotary biopsy needle transmission structure according to any one of claims 5 to 7, characterized in that: A blood guide groove is formed along the axial direction of the outer sleeve at the connection between the outer wall of the outer sleeve and the outer wall of the air guide bin.

9. A breast biopsy resection device, characterized in that: The rotary biopsy needle transmission structure according to any one of claims 1 to 8 further comprises: A housing, wherein the end of the rotary cutting blade tube away from the blade head end, the hollow screw, the linear drive gear and the rotary drive gear are all installed in the installation space of the housing; An operation window is provided on the shell, and the teeth of the linear drive gear and the teeth of the rotary drive gear both extend out of the installation space from the operation window.

10. A breast biopsy resection device according to claim 9, characterized in that: An extension tube is coaxially arranged at one end of the rotary drive gear close to the cutter head, and a slide rod is formed on the inner wall of the extension tube along its own axis; A connecting ring is formed at one end of the hollow screw, and a sliding groove is formed on the outer circumference of the connecting ring corresponding to the sliding rod; the connecting ring is coaxially embedded in the extension tube, and the sliding rod is correspondingly embedded in the sliding groove, and slides and cooperates with the inner wall of the sliding groove along the axis of the hollow screw; The outer wall of the extension tube is formed with a limiting rod along its own axial direction, and a U-shaped bracket for fixing the extension tube is provided on the shell, and the limiting rod is located at the end of the extension tube away from the U-shaped bracket; when the axis of the rotating drive gear rotates, the limiting rod swings synchronously and respectively abuts against the two end walls of the opening of the U-shaped bracket.

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