A biopsy forceps

Abstract

The utility model discloses a biopsy forceps relates to medical instrument and physical treatment use equipment structure design technical field. The biopsy forceps, include: body, pipeline, cutter head, pull mechanism and draw a rope, body downside fixed connection pipeline one end, pipeline other end fixed connection cutter head, pull mechanism connects in the body inside, and the pull mechanism is fixedly connected through the draw a rope between cutter head, makes pull mechanism and draws cutter head cutting sample. The biopsy forceps, through body downside fixed connection pipeline one end, pipeline other end fixed connection cutter head, pull mechanism connects in the body inside. The body is for operator to hold to control cutter head to extend in, and the cutter head is convenient for driving to reach the sampling position smoothly. Cutter head is fixed on the pipeline, and with the pipeline together extends into the patient's body. Pull mechanism is convenient for cutter head to separate the sample from the body after cutting sample, and improves the operation stability.

Description

Technical Field

[0001] This utility model relates to the field of structural design technology of medical devices and physical therapy equipment, and in particular to a biopsy forceps. Background Technology

[0002] As a core tool for obtaining tissue samples in the field of medical devices, the rationality of the structural design of biopsy forceps is directly related to the efficiency, accuracy, and operational safety of clinical sampling. With the development of minimally invasive diagnostic and treatment technologies, higher requirements have been placed on the precise operation, repositioning reliability, and structural compatibility of biopsy forceps. However, existing biopsy forceps have revealed many structural defects in practical applications.

[0003] Existing biopsy forceps have the following shortcomings in practical applications: Traditional biopsy forceps often employ simple sliding or lever mechanisms, which are prone to positional shifts or jamming during sampling. This makes it difficult for surgeons to precisely control the cutting action of the blade, affecting the integrity and efficiency of the sample. Some biopsy forceps lack a reliable reset device, requiring manual reset of the blade after each sampling. This not only increases the number of steps but may also affect continuous sampling due to untimely reset, reducing surgical efficiency. The connection between the body, tubing, and blade of traditional biopsy forceps is cumbersome, increasing the difficulty of instrument cleaning and potentially affecting sampling accuracy due to structural loosening during use.

[0004] It is evident that existing biopsy forceps suffer from problems such as insufficient operational flexibility and stability, and imperfect reset function. Utility Model Content

[0005] In view of this, the main objective of this utility model is to provide a biopsy forceps that can solve the problems of insufficient operational flexibility, insufficient stability in the number of tissue samples obtained, imperfect repositioning function, and secondary damage to surrounding tissues caused by the removal of the forceps after cutting the sample in the prior art.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] The biopsy forceps includes a body, a tube, a blade, a pulling mechanism, and a pull rope. One end of the tube is fixedly connected to the lower side of the body, and the other end of the tube is fixedly connected to the blade. The pulling mechanism is connected inside the body, and the pulling mechanism and the blade are fixedly connected by the pull rope, so that the pulling mechanism pulls the blade to cut and collect a sample.

[0008] In a preferred embodiment, the cutter head includes an outer cutter body and an inner cutter body, wherein the inner cutter body is slidably connected inside the outer cutter body, and the outer cutter body is fixedly connected to the end of the pipe.

[0009] In a preferred embodiment, the inner blade is fixedly connected to one end of the pull rope;

[0010] In a preferred embodiment, the outer blade has a cutting groove, allowing the tissue to be sampled to extend into the cutting groove, and the pull rope pulls the inner blade to slide along the side of the outer blade near the pipe to cut off the tissue to be sampled.

[0011] In a preferred embodiment, the outer blade body includes: a blade head, a cutting groove, a spring-loaded portion, and a blade body connecting portion. The blade head and the spring-loaded portion are integrally formed on both sides of the cutting groove, and the other side of the spring-loaded portion is detachably connected to the blade body connecting portion.

[0012] In a preferred embodiment, the cutting groove is formed within the cutting groove portion;

[0013] In a preferred embodiment, the pulling mechanism includes: a fixed rod, one end of the pull rope being fixedly connected to the fixed rod, and a pulling member hole being provided through the middle of the fixed rod, the pulling member hole being fixedly connected to one end of the pull rope;

[0014] In a preferred embodiment, a traction through hole is provided in the middle of the blade body connecting part, and the other end of the pull rope passes through the traction through hole and is fixedly connected to the inner blade body;

[0015] In a preferred embodiment, the blade connecting portion is fixedly connected to one end of the pipe.

[0016] In a preferred embodiment, the inner blade body includes: a sampling part, a sliding part, and a fixing part, wherein the sliding part and the fixing part are integrally formed on both sides of the sampling part;

[0017] In a preferred embodiment, a fixing groove is provided on the upper surface of the sampling part near the blade head, and a blade structure is fixedly connected to the fixing groove.

[0018] In a preferred embodiment, the fixing part is provided with a connecting hole, and the connecting hole is fixedly connected to one end of the pull rope.

[0019] In a preferred embodiment, the blade head is provided with a first through hole, and the connection between the first through hole and the inner wall of the blade head is stepped.

[0020] In a preferred embodiment, a second through hole is provided on the upper side of the sliding part, and the second through hole passes through the upper and lower sides of the sliding part.

[0021] In a preferred embodiment, the blade structure includes: an annular blade, a fixing plate, and a connector, wherein the annular blade is integrally formed on the lower surface of the fixing plate, and the connector is integrally formed in the middle of the fixing plate;

[0022] In a preferred embodiment, the connector is fixedly connected to the fixing groove.

[0023] In a preferred embodiment, the springback portion is provided with the reset member, the upper side of the reset member abutting against the lower part of the inner blade body, and the lower side of the reset member abutting against the upper part of the blade body connecting portion.

[0024] In a preferred embodiment, the body includes a handle portion and a sleeve portion, wherein the upper side of the sleeve portion is fixedly connected to the handle portion.

[0025] In a preferred embodiment, the sleeve portion includes: a cylinder body, a first fixing member, an extension cylinder, and a second fixing member, wherein the diameter of the extension cylinder is smaller than that of the cylinder body;

[0026] In a preferred embodiment, the first fixing member is fixedly connected to the lower side of the cylinder body, the first fixing member has a first through hole in the middle, the first through hole is fixedly connected to the upper end of the extension cylinder, the lower end of the extension cylinder is fixedly connected to the second fixing member, the second fixing member has a second through hole in the middle, and the second through hole is fixedly connected to one end of the pipe.

[0027] In a preferred embodiment, a sliding groove is provided on the cylinder body, and the pulling mechanism is connected in the sliding groove;

[0028] In a preferred embodiment, the pulling mechanism further includes: a pulling member and a limiting mechanism, wherein the pulling member has a through hole in the middle, the through hole passes through both sides of the middle of the pulling member, the fixing rod passes through the sliding groove, and the two sides of the fixing rod pass through the through hole and are fixedly connected to the pulling member;

[0029] In a preferred embodiment, a limiting hole is also provided on the cylinder body, the limiting hole is connected to the limiting mechanism, and a limiting groove is provided on the upper side of the pulling member, the limiting groove is limited and connected to the limiting mechanism.

[0030] In a preferred embodiment, a pull hole is provided through the middle of the fixed rod, and one end of the pull rope is fixedly connected to the pull hole.

[0031] In a preferred embodiment, the body and the inside of the pipe are provided with a curvature adjustment device, which can adjust the curvature of the pipe by tightening and loosening the curvature adjustment cable kit through the curvature adjustment knob.

[0032] The biopsy forceps of this utility model have the following beneficial effects:

[0033] The biopsy forceps includes: a body, a tube, a blade, a pulling mechanism, and a pull rope. One end of the tube is fixedly connected to the lower side of the body, and the other end of the tube is fixedly connected to the blade. The pulling mechanism is connected inside the body, and the pulling mechanism and the blade are fixedly connected by the pull rope, so that the pulling mechanism pulls the blade to cut and collect samples.

[0034] This biopsy forceps features a tube fixedly connected to the underside of the main body, with a blade fixedly connected to the other end. A pulling mechanism is integrated inside the main body. The main body is held by the operator to control the blade's insertion and facilitate its smooth passage to the sampling location. The blade is fixed to the tube and extends into the patient's body along with it. The pulling mechanism allows for the extraction of the sample after cutting, protecting the cutting area from further damage to surrounding organs and tissues. This simplified instrument structure enhances operational stability. The pull mechanism, connected to the blade with a cord, prevents external interference and ensures precise transmission of the cutting action to the blade, resolving the sampling deviation problem inherent in traditional biopsy forceps due to their structure. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a biopsy forceps according to one embodiment of the present disclosure;

[0037] Figure 2 This is a schematic diagram of the biopsy forceps from another angle according to one embodiment of the present disclosure;

[0038] Figure 3 This is a cross-sectional view of the biopsy forceps barrel position without the curvature adjustment device according to one embodiment of the present disclosure;

[0039] Figure 4 A cross-sectional view of the tubing location of a biopsy forceps according to one embodiment of the present disclosure;

[0040] Figure 5 A cross-sectional view of the blade position of a biopsy forceps according to one embodiment of the present disclosure;

[0041] Figure 6 for Figure 5 A partial enlarged view of biopsy forceps A according to an embodiment of the present disclosure;

[0042] Figure 7 This is a schematic diagram of the blade of a biopsy forceps according to one embodiment of the present disclosure;

[0043] Figure 8 A cross-sectional view of the blade of a biopsy forceps according to one embodiment of the present disclosure;

[0044] Figure 9 This is a schematic diagram of the inner blade of a biopsy forceps according to one embodiment of the present disclosure;

[0045] Figure 10 This is a cross-sectional view of the inner blade of a biopsy forceps according to one embodiment of the present disclosure;

[0046] Figure 11 This is a schematic diagram of the blade structure of a biopsy forceps according to one embodiment of the present disclosure;

[0047] Figure 12 This is a cross-sectional view of the blade structure of a biopsy forceps according to one embodiment of the present disclosure;

[0048] Figure 13 An exploded view of the blade position of a biopsy forceps according to one embodiment of the present disclosure;

[0049] Figure 14 This is a schematic diagram of the handle portion of a biopsy forceps according to one embodiment of the present disclosure;

[0050] Figure 15 This is a schematic diagram of the structure of the barrel of a biopsy forceps according to one embodiment of the present disclosure;

[0051] Figure 16 This is a structural schematic diagram showing the position of the extension tube of a biopsy forceps according to one embodiment of the present disclosure;

[0052] Figure 17 This is a cross-sectional view showing the position of the extension tube of a biopsy forceps according to one embodiment of the present disclosure;

[0053] Figure 18 This is a schematic diagram of the structure of the pulling member of a biopsy forceps according to one embodiment of the present disclosure;

[0054] Figure 19 This is a cross-sectional view of the pulling mechanism of a biopsy forceps according to one embodiment of the present disclosure.

[0055] [Explanation of Key Component Symbols]

[0056] 1. Ontology;

[0057] 11. Handle part;

[0058] 12. Sleeve section;

[0059] 121. Cylinder body; 122. First fixing component; 123. Extension cylinder; 124. Second fixing component;

[0060] 1221, First through hole; 1241, Second through hole;

[0061] 1211. Sliding groove; 1212. Limiting hole;

[0062] 2. Pipelines;

[0063] 3. Blade head;

[0064] 31. External cutter body;

[0065] 311. Cutting head; 3111. First through hole;

[0066] 312. Cutting groove; 313. Springback section; 314. Tool body connecting section;

[0067] 3121, Cutting groove; 3141, Traction through hole;

[0068] 32. Inner cutter body;

[0069] 321, Sampling section; 0321, Fixing groove;

[0070] 3211, Blade structure; 32111, Circular blade; 32112, Fixing plate; 32113, Connector;

[0071] 322, Sliding part; 3221, Second through hole;

[0072] 323, Fixing part; 3231, Connecting hole;

[0073] 4. Pulling mechanism;

[0074] 41. Pulling component;

[0075] 411. Limiting groove;

[0076] 412. Through hole;

[0077] 42. Limiting mechanism;

[0078] 43. Fixing rod; 431. Pulling part hole;

[0079] 5. Pull the rope;

[0080] 6. Reset component;

[0081] 7. Curvature adjustment device. Detailed Implementation

[0082] The following detailed description of a biopsy forceps according to the present invention, in conjunction with the accompanying drawings and embodiments, will further illustrate this invention.

[0083] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0084] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0085] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0086] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] according to Figure 1 — Figure 19As shown, to allow the biopsy forceps to reposition after the blade 3 has cut tissue, the forceps include: a body 1 for the user to grip, a connecting tube 2, a blade 3 fixed to the tube 2 for easy insertion and sample collection, a pulling mechanism 4 to prevent damage to surrounding tissues or organs after sampling, and a pull rope 5 that allows the pulling mechanism 4 to pull the blade 3 to cut. One end of the tube 2 is fixedly connected to the lower side of the body 1, and the other end of the tube 2 is fixedly connected to the blade 3. The pulling mechanism 4 is connected inside the body 1, and one end of the pull rope 5 is fixedly connected to the pulling mechanism 4, while the other end of the pull rope 5 is fixedly connected to the blade 3. The pulling mechanism 4 and the blade 3 are fixedly connected via the pull rope 5, allowing the pulling mechanism 4 to pull the blade 3 to cut and collect the sample. The body 1 is gripped by the operator to control the insertion of the blade 3, facilitating its smooth passage to the sampling position. The blade 3 is fixed to the tube 2 and is inserted into the patient's body along with the tube 2. The pulling mechanism 4 facilitates the extraction of the sample from the body after the blade 3 has cut and sampled, and protects the cutting position of the blade 3 from the risk of further damage to surrounding organs and tissues. Through the cooperation of the pulling mechanism 4 and the reset component 6, the blade 3 automatically resets after cutting the tissue, avoiding the inefficiency caused by manual reset. At the same time, the pulling mechanism 4 can quickly extract the sample, preventing the blade 3 from causing secondary damage to surrounding tissues.

[0088] The following is a further explanation of the use of this biopsy forceps. The operator holds the main body 1 and inserts the tube 2 along with the blade 3 into the sampling position. The sampled tissue is squeezed into the cutting groove 3121 of the blade 3 due to pressure. Depending on the size of the sample to be sampled, the tissue to be sampled can be completely filled into the cutting groove 3121, or the tissue to be sampled can be pressed into the cutting groove 3121 only halfway to control the size of the sample. The operator then simply pulls the pull member 41. The fixing rod 43 on the pull member 41 moves the pull rope 5 closer to the handle. The limiting mechanism 42 on the pull member 41 engages and is fixed in the limiting hole 1212. At this time, the other end of the pull rope 5 is connected to the inner blade 32. The inner blade 32 also moves with the pull rope 5 towards the connecting part 314 of the outer blade 31. The blade structure 3211 moves along with it, and the annular blade 32111 cuts the tissue in the cutting groove 3121 and places the tissue in the groove of the sampling part 321. Then, they enter the springback part 313 together. At this time, the reset member 6 is compressed. The upper side of the sliding part 322 of the inner blade 32 is located in the cutting groove part 312 to prevent the surrounding tissue from being squeezed into the cutting groove 3121 again. Finally, the blade 3 is pulled out of the body, that is, the puller 41 is pressed down on one side of the blade 3, the limiting mechanism 42 retracts and separates from the limiting hole 1212, the reset member 6 drives the inner blade 32 to reset, and the sampling tissue located in the groove inside the sampling part 321 returns to the cutting groove 3121 of the outer blade 31 for the operator to take a sample.

[0089] To enable the blade head 3 to take samples upon reaching the sampling position, the blade head 3 includes: an outer blade body 31 for inserting into the sample tissue and an inner blade body 32 for primarily cutting the sample. The inner blade body 32 is slidably connected inside the outer blade body 31. The outer blade body 31 is fixedly connected to one end of the pipe 2. One end of the pipe 2 is threadedly connected to the second fixing member 124, and the other end of the pipe 2 has internal threads on its inner wall. The outer wall of the blade body connecting part 314 of the blade head 3 has external threads, and the pipe 2 is threadedly connected to the blade body connecting part 314. One end of the pull rope 5 is fixedly connected to the inner blade body 32. The inner blade body 32 and the outer blade head 3 are independent components, ensuring that the inner blade body 32 can slide inside the outer blade head 3. The inner blade 32 is fixedly connected to one end of the pull rope 5. In order to enable the biopsy forceps to take samples through the blade head 3, a cutting groove 3121 is provided on the outer blade 31, so that the tissue to be sampled can be inserted into the cutting groove 3121. At this time, simply pull the pulling member 41, and the inner blade 32 will slide along the side of the outer blade 31 near the pipe 2 to cut off the tissue to be sampled.

[0090] To allow the inner blade 32 to slide within the outer blade 31, the outer blade 31 includes a blade head 3 with sufficient sharpness to insert into the sampled tissue, a cutting groove 312 for compatibility with the inner blade 32, a spring-loaded portion 313 with a built-in reset member 6, and a blade connecting portion 314 fixedly connected to the pipe 2. The cutting groove 312 has one integrally formed blade head 3 on one side and spring-loaded portion 313 on the other. The other side of the spring-loaded portion 313 is detachably connected to the blade connecting portion 314. The spring-loaded portion 313 and the blade connecting portion 314 are detachably connected; specifically, a groove is provided on the outer wall of the spring-loaded portion 313, and the blade connecting portion 314 is an independent component with a buckle on its surface. The spring-loaded portion 313 and the blade connecting portion 314 are fixedly connected by engaging the buckle with the groove. This is done to allow the inner blade 32 to be installed inside the outer blade 31. During installation, the inner blade 32 extends into the outer blade 31 from one end of the blade connecting portion 314 on the lower side of the outer blade 31. When the sliding portion 322 reaches the connection point between the blade head 3 and the cutting groove portion 312, it is constrained by the inner wall and stops moving. Then, the reset member 6 is placed inside the spring return portion 313. In this specific embodiment, the reset member 6 is a reset spring. Finally, the blade connecting portion 314 and the spring return portion 313 are engaged. To accommodate the inner blade 32, a cutting groove 3121 is provided in the cutting groove 3121 portion 312. The cutting groove 3121 works in conjunction with the inner blade 32. When the blade head 3 is inserted into the sampling area, the cutting groove 3121 portion 312 traps the tissue within it. Then, by pulling the inner blade 32, the blade structure 3211 cuts the sample tissue trapped in the cutting groove 3121. The sampling portion 321 carries the sample tissue and moves to the springback portion 313. Simultaneously, since the blade structure 3211 also slides into the springback portion 313, the sliding portion 322 reaches the cutting groove portion 312 of the outer blade 31, preventing the outer blade 31 from trapping unnecessary tissue in the cutting groove 3121. This facilitates the operator's smooth removal of the blade head 3 from the body. To connect the pulling mechanism 4 to the inner blade 32, the pulling mechanism 4 includes a fixed rod 43, with one end of the pull rope 5 fixedly connected to the fixed rod 43. A traction through hole 3141 is provided in the middle of the blade connecting part 314. One end of the pull rope 5 passes through the traction through hole 3141 and is fixedly connected to the connecting hole 3231. The blade connecting part 314 is fixedly connected to one end of the pipe 2. The sliding fit between the cutting groove 3121 and the sampling part 321 enables precise insertion of the sampled tissue. The pre-compression state of the reset member 6 in the springback part 313 provides an automatic reset driving force for the inner blade 32.

[0091] To enable the inner blade 32 to perform cutting operations, the inner blade 32 includes: a sampling part 321 for cutting samples at a sampling position, a sliding part 322 that moves inside the outer blade 31, and a fixing part 323 that is fixedly connected to one end of the pulling member 5. The fixing part 323 has a connecting hole 3231, which is fixedly connected to the other end of the pulling member 5. To improve connection strength and enhance the overall rigidity of the components, the sliding part 322 and the fixing part 323 are integrally formed on both sides of the sampling part 321. Furthermore, a fixing groove 0321 is formed on the upper surface of the sampling part 321 near the blade head 311, and a blade structure 3211 is fixedly connected to the fixing groove 0321 to ensure sharpness and strength during sampling. The annular blade 32111 of the blade structure 3211 extends circumferentially with the sampling part 321, thus allowing the annular blade 32111 on the inner blade 32 to have the largest possible contact surface, improving the cutting effect. The circumferential extension design of the annular blade 32111 expands the cutting contact surface, and the integrally formed sampling part 321, sliding part 322 and fixing part 323 enhance the structural strength, ensuring that the sample is cut in one go.

[0092] To prevent blood from entering the outer incision blade 31 when the blade head 3 is inserted into the sampling tissue, thus preventing the pulling mechanism 4 from pulling the inner incision blade 32 to slide and cut the sample, a first through hole 3111 is provided in the blade head 311. The first through hole 3111 passes through both the upper and lower sides of the blade head 311, and the connection between the first through hole 3111 and the inner wall of the blade head 311 is stepped. The stepped surface serves to limit the sliding of the inner incision blade 32 within the outer incision blade 31. When the reset member 6 drives the inner incision blade 32 to reset, it prevents the reset position of the inner incision blade 32 from deviating, which would affect the cutting efficiency. Correspondingly, to further prevent blood from clogging the outer incision blade 31, a second through hole 3221 is provided on the sliding part 322, passing through both the upper and lower sides of the sliding part 322.

[0093] To enable the blade structure 3211 to cut and be fixed, the blade structure 3211 includes: an annular blade 32111 that mainly performs cutting, a fixing plate 32112 for connecting and fixing, and a connector 32113 that is bonded to the fixing groove 0321. To increase structural strength, the annular blade 32111 extends integrally from the lower surface of the fixing plate 32112, and the connector 32113 is integrally formed in the upper middle part of the fixing plate 32112. The connector 32113 is bonded to the fixing groove 0321. Correspondingly, to prevent blood from blocking the inside of the blade head 3 and to cooperate with the second through hole 3111, the fixing plate 32112 has a flow hole corresponding to the position of the second through hole 3111, and the flow hole penetrates the surface of the fixing plate 32112. The blade structure 3211 adopts a ring-shaped blade 32111, whose circumferentially extending structure can expand the cutting contact surface, allowing the inner ring-shaped blade 32111 to completely cut the tissue sample in one go during sliding cutting. This avoids tissue tearing or incomplete sampling caused by insufficient cutting surface, making it particularly suitable for clinical scenarios requiring precise control of sample size. The ring-shaped blade 32111 cooperates with the cutting groove 3121. When the inner blade body 32 slides, the ring-shaped blade 32111 can accurately cut into the tissue within the cutting groove 3121. Combined with the elastic reset function of the reset member 6, efficiency is improved.

[0094] To enable the inner blade 32 to return to its original position after cutting the sample, a reset member 6 is provided within the springback portion 313. The upper side of the reset member 6 abuts against the lower part of the inner blade 32, and the lower side abuts against the upper surface of the blade connecting portion 314. In this specific embodiment, the reset member 6 is a reset spring. The upper side of the reset member 6 abuts against the surface of the connection between the fixed portion 323 and the sliding portion 322, and the lower side abuts against the upper surface of the blade connecting portion 314, ensuring that the reset member 6 can undergo elastic deformation to achieve reset. The two ends of the reset member 6 abut against the inner blade 32 and the connecting portion 14 respectively, and the elastic deformation pushes the sampling portion 321 back to its initial position, thereby improving the continuous sampling efficiency.

[0095] To facilitate user gripping, the main body 1 includes a handle portion 11 for easy user gripping and a sleeve portion 12 connected to the pulling mechanism 4. The handle portion 11 is located on the upper side of the sleeve portion 12, and the pulling mechanism 4 is connected to the upper limit of the sleeve portion 12. This makes it easier for the user to hold the sleeve portion 12 with one hand. In this specific embodiment, a gripping method is provided. In this gripping method, the user's left or right thumb passes through the annular ring of the handle portion 11 and presses the lower inner wall of the annular ring of the handle portion 11 with the thumb. At the same time, the index and ring fingers are clamped between the two sides of the central cylindrical position of the pulling mechanism 4. Under this gripping method, after the user inserts the blade 3 into the sampling position, they can bring their index and ring fingers together with their thumb at any time to drive the blade 3 to take a sample. Of course, the above gripping method is only an example implementation, and gripping methods include but are not limited to this. The combination of the handle portion 11 and the sleeve portion 12 provides the operator with a more convenient and efficient gripping method, while not reducing the stability of operating the biopsy forceps. The ring-shaped design fits snugly against the fingers, allowing for stable one-handed grip.

[0096] To avoid stress concentration between the sleeve portion 12 of the biopsy forceps and the conduit 2, the sleeve portion 12 includes: a cylinder body 121 slidably connected to the pulling mechanism 4; a first fixing member 122 connecting the cylinder body 121 and the extension cylinder 123; and a second fixing member 124 connecting the extension cylinder 123 and the conduit 2, wherein the diameter of the extension cylinder 123 is smaller than that of the cylinder body 121. The first fixing member 122 is fixedly connected to the lower side of the cylinder body 121. A first through hole 1221 is opened in the middle of the first fixing member 122, which is fixedly connected to the upper end of the extension cylinder 123. The lower end of the extension cylinder 123 is fixedly connected to the second fixing member 124, which is fixedly connected to the lower end of the extension cylinder 123. A second through hole 1241 is opened in the middle of the second fixing member 124, which is fixedly connected to one end of the conduit 2. The other end of the conduit 2 is fixedly connected to the cutting head 3. To facilitate the connection between the first fixing member 122 and the second fixing member 124, external threads are respectively provided on the outer walls of the cylinders of the first fixing member 122 and the second fixing member 124. Similarly, internal threads are provided on the inner walls of the cylinder body 121 and the extension cylinder 123. The lower side of the cylinder body 121 is threadedly connected to the first fixing member 122, and the lower side of the extension cylinder 123 is threadedly connected to the second fixing member 124. To securely connect the first fixing member 122 and the extension cylinder 123, a first through hole 1221 is provided in the middle of the first fixing member 122. The first through hole 1221 penetrates the first fixing member 122, and its inner wall is provided with internal threads. An external thread is provided on the upper side of the extension cylinder 123, and the first through hole 1221 is threadedly connected to the upper side of the extension cylinder 123. Accordingly, in order to fix the pipe 2 to the second fixing member 124, a second through hole 1241 is provided in the middle of the second fixing member 124. The second through hole 1241 penetrates the first fixing member 122, and the inner wall of the second through hole 1241 is provided with internal threads, while the upper side of the pipe 2 is provided with external threads. The second through hole 1241 is threadedly connected to the upper side of the extension cylinder 123. This is to facilitate the insertion of the cutter head 3 into the body and avoid the cutter head 3 being difficult to control due to local stress concentration. The threaded connection structure of the first fixing member 122 and the second fixing member 124 disperses the stress between the sleeve and the pipe 2, avoiding instrument deformation caused by local stress concentration. The extension cylinder 123 further absorbs bending stress, ensuring the flexibility of the cutter head's rotation.

[0097] To allow the cylinder body 121 to slide on the pulling mechanism 4, a sliding groove 1211 is provided on the cylinder body 121, and the pulling mechanism 4 is connected within the sliding groove 1211. The sliding groove 1211 allows the pulling mechanism 4 to slide on the cylinder body 121, thereby controlling the cutting action of the cutter head 3. For further explanation, the pulling mechanism 4 includes: a pulling member 41 that is directly contacted and used by the operator; a limiting mechanism 42 that limits the pulling member 41 after it has been pulled; and a fixing rod 43 that connects the pulling member to the sliding groove 1211. To enable the fixing rod 43 to fix the pulling member 41, through holes 412 are provided in the middle of both sides of the cylindrical portion of the pulling member. Internal threads are provided in the through holes 412, and external threads are provided at both ends of the fixing rod 43. The fixing rod 43 passes through the through hole 412 on one side, and the two ends of the fixing rod 43 are threaded to the through holes 412 on both sides respectively. To connect the pulling mechanism 4 to the sliding groove 1211, thereby slidably connecting the pulling mechanism 4 to the cylinder body 121, during installation, the fixing rod 43 is passed through the through hole 412 on one side and then through the sliding groove 1211. Finally, both ends of the fixing rod 43 are threaded to the through hole 412, thus connecting the pulling component to the cylinder body 121. The sliding engagement between the sliding groove 1211 and the fixing rod 43 enables the movement of the pulling mechanism 4. The snap-locking mechanism 42 of the limiting hole 1212 prevents accidental rebound during sampling, ensuring the stability of the cutting action.

[0098] In addition, to secure the limiting mechanism 42, a limiting hole 1212 is provided on the cylinder body 121. The limiting hole 1212 is located above the sliding groove 1211. This is because, in this specific embodiment, the pulling member 41 needs to be pulled upwards, that is, closer to the handle portion 11, so that the pulling mechanism 4 drives the inner blade 32 to slide and sample by pulling the pulling member 5. After the inner blade 32 is driven to sample, the limiting mechanism 42 is fixed inside the limiting hole 1212 to prevent the inner blade 32 from being reset by the reset member 6, thus preventing the blade structure 3211 from continuing to cut around the sampled tissue and causing unnecessary damage. A limiting groove 411 is provided on the upper side of the pulling member, and the limiting groove 411 limits the connection of the limiting mechanism 42.

[0099] To enable the pulling mechanism 4 to drive the inner blade 32 of the cutter head 3 to slide within the outer blade 31, a pull rope hole 431 is provided through the middle of the side wall of the fixing rod 43. The pull rope hole 431 is used to fix one end of the pull rope 5. Correspondingly, the other end of the pull rope 5 is fixedly connected to the connection hole 3231. In this way, when the pulling mechanism 4 is pulled, the inner blade 32 can slide inside the outer blade 31. The pull rope 5 passes through the pulling member hole 431 and is directly connected to the cutter head 3, converting the linear motion of the pulling member 41 into the sliding motion of the inner blade 32, thus eliminating transmission errors.

[0100] In a preferred embodiment of this specific implementation, to enable the pipe 2 to have a certain degree of bending capability, facilitating the more precise attainment of the sampling position by the cutter head 3, a bending adjustment device 7 is provided inside the body 1 and the pipe 2. The bending adjustment device 7 includes a bending adjustment knob and a bending adjustment cable assembly. The bending adjustment knob is located on the handle, and one end of the bending adjustment cable assembly is connected to the bending adjustment knob, while the other end is connected to the pipe 2. The bending adjustment knob can adjust the bending of the pipe 2 by tightening and loosening the bending adjustment cable assembly. The aforementioned bending adjustment device 7 is prior art, disclosed in patent application document number 2023217132286. Specific technical solutions will not be elaborated further in this specific embodiment.

[0101] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A biopsy forceps, characterized in that, include: The body (1), pipe (2), cutter head (3), pulling mechanism (4) and pull rope (5) are fixedly connected to one end of the pipe (2) on the lower side of the body (1) and the other end of the pipe (2) is fixedly connected to the cutter head (3). The pulling mechanism (4) is connected inside the body (1). The pulling mechanism (4) and the cutter head (3) are fixedly connected by the pull rope (5) so that the pulling mechanism (4) pulls the cutter head (3) to cut and sample.

2. A biopsy forceps according to claim 1, characterized in that, The cutter head (3) includes an outer cutter body (31) and an inner cutter body (32), wherein the inner cutter body (32) is slidably connected inside the outer cutter body (31), and the outer cutter body (31) is fixedly connected to the end of the pipe (2); The inner blade (32) is fixedly connected to one end of the pull rope (5); The outer blade (31) has a cutting groove (3121) so that the tissue to be sampled extends into the cutting groove (3121) and the pull rope (5) pulls the inner blade (32) to slide and cut off the tissue to be sampled along the side of the outer blade (31) near the pipe (2).

3. A biopsy forceps according to claim 2, characterized in that, The outer blade body (31) includes: a blade head (311), a cutting groove (312), a spring-loaded part (313), and a blade body connecting part (314). The cutting groove (312) has the blade head (311) and the spring-loaded part (313) integrally formed on both sides, and the other side of the spring-loaded part (313) is detachably connected to the blade body connecting part (314). The cutting groove (3121) is formed inside the cutting groove portion (312); The pulling mechanism (4) includes: a fixed rod (43), one end of the pull rope (5) is fixedly connected to the fixed rod (43), and a pulling hole (431) is opened through the middle of the fixed rod (43), and one end of the pull rope (5) is fixedly connected to the pulling hole (431); The blade body connecting part (314) has a traction through hole (3141) in the middle, and the other end of the pull rope (5) passes through the traction through hole (3141) and is fixedly connected to the inner blade body (32); The blade connecting part (314) is fixedly connected to one end of the pipe (2).

4. A biopsy forceps according to claim 3, characterized in that, The inner blade body (32) includes: a sampling part (321), a sliding part (322) and a fixing part (323), wherein the sliding part (322) and the fixing part (323) are integrally formed on both sides of the sampling part (321). The sampling part (321) has a fixing groove (0321) on the upper surface of the side near the blade head (311), and a blade structure (3211) is fixedly connected to the fixing groove (0321). The fixing part (323) is provided with a connecting hole (3231), and the connecting hole (3231) is fixedly connected to one end of the pull rope (5).

5. A biopsy forceps according to claim 4, characterized in that, The cutting head (311) has a first through hole (3111), and the connection between the first through hole (3111) and the inner wall of the cutting head (311) is stepped. The sliding part (322) has a second through hole (3221) on its upper side, and the second through hole (3221) passes through the upper and lower sides of the sliding part (322).

6. A biopsy forceps according to claim 5, characterized in that, The blade structure (3211) includes: an annular blade (32111), a fixing plate (32112), and a connector (32113). The annular blade (32111) is integrally formed on the lower surface of the fixing plate (32112), and the connector (32113) is integrally formed on the upper center of the fixing plate (32112). The connector (32113) is fixedly connected to the fixing groove (0321).

7. A biopsy forceps according to claim 6, characterized in that, The springback part (313) is provided with a reset member (6), the upper side of the reset member (6) abuts against the lower part of the inner blade body (32), and the lower side of the reset member (6) abuts against the upper part of the blade body connecting part (314).

8. A biopsy forceps according to claim 7, characterized in that, The main body (1) includes a handle part (11) and a sleeve part (12), with the handle part (11) fixedly connected to the upper side of the sleeve part (12). The sleeve portion (12) includes: a cylinder body (121), a first fixing member (122), an extension cylinder (123), and a second fixing member (124), wherein the diameter of the extension cylinder (123) is smaller than that of the cylinder body (121). The first fixing member (122) is fixedly connected to the lower side of the cylinder body (121). The first fixing member (122) has a first through hole (1221) in the middle. The first through hole (1221) is fixedly connected to the upper end of the extension cylinder (123). The lower end of the extension cylinder (123) is fixedly connected to the second fixing member (124). The second fixing member (124) has a second through hole (1241) in the middle. The second through hole (1241) is fixedly connected to one end of the pipe (2).

9. A biopsy forceps according to claim 8, characterized in that, A sliding groove (1211) is provided on the cylinder body (121), and the pulling mechanism (4) is connected inside the sliding groove (1211). The pulling mechanism (4) further includes: a pulling member (41) and a limiting mechanism (42). The pulling member (41) has a through hole (412) in the middle, which passes through both sides of the middle of the pulling member (41). The fixing rod (43) passes through the sliding groove (1211), and the two sides of the fixing rod (43) pass through the through hole (412) to fix and connect the pulling member (41). The cylinder body (121) is also provided with a limiting hole (1212), the limiting hole (1212) is connected to the limiting mechanism (42), and the upper side of the pulling member (41) is provided with a limiting groove (411), the limiting groove (411) is connected to the limiting mechanism (42).

10. A biopsy forceps according to claim 9, characterized in that, The main body (1) and the pipe (2) are equipped with a curvature adjustment device (7). The curvature adjustment device (7) can adjust the curvature of the pipe (2) by tightening and loosening the curvature adjustment cable kit through the curvature adjustment knob.

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