Biopsy forceps with telescopic head

Abstract

The biopsy forceps comprise a front handle, a sliding seat cavity is formed in the front handle, the sliding seat cavity penetrates through the front handle in the front-back direction, a sliding groove is formed in the side wall of the front handle, an outer tube fixing seat is fixedly arranged at the front end of the sliding seat cavity, an inner tube sliding seat is arranged in the sliding seat cavity, and the inner tube sliding seat is connected with a sliding seat pin. The sliding seat pin extends out of the sliding chute; the rear end of the spring outer tube is fixedly connected with the outer tube fixing seat; the rear end of the spring inner tube penetrates through the spring outer tube and the outer tube fixing seat and then is fixedly connected with the inner tube sliding seat, the front end of the spring inner tube is connected with the tong head, the inhaul cable is arranged in the spring inner tube, the front end of the inhaul cable is connected with the tong head, and the rear end of the inhaul cable is connected with the sliding ring; the front end of the rear handle is fixedly connected with the rear end of the front handle, and the sliding ring is arranged on the rear handle. And a spring inner tube with a thinner end can extend out, so that the endoscope can be bent conveniently.

Description

Technical Field

[0001] This utility model relates to medical devices, specifically to a retractable biopsy forceps. Background Technology

[0002] like Figure 1 As shown, a typical biopsy forceps includes a handle 10, a spring tube 11, a pull cable 12, a forceps head 13, and a slip ring 14. The rear end of the spring tube 11 is connected to the handle 10, and the front end of the spring tube 11 is connected to the forceps head 13. The pull cable 12 passes through the spring tube 11, and the front end of the pull cable 12 is connected to the forceps head 13. The rear end of the pull cable 12 is connected to the slip ring 14. The forceps head 13 is driven to work by the back-and-forth movement of the slip ring 14 on the handle 10.

[0003] The problems with ordinary biopsy forceps on the market are: after the biopsy forceps are inserted into the endoscope, the bending angle of the endoscope will be smaller, and it is necessary to push the spring tube or handle to make the forceps head press against the sampled tissue, which affects the feel of the endoscope operation and the sampling operation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a retractable biopsy forceps to solve the technical problem of sampling operation caused by the inability of the forceps head to extend or retract in previous biopsy forceps.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A retractable-head biopsy forceps is provided, characterized in that it includes...

[0007] A front handle has a sliding cavity inside, which extends through the front handle in a front-to-back direction. A sliding groove is formed on the side wall of the front handle. An outer tube fixing seat is fixedly installed at the front end of the sliding cavity. An inner tube slide is installed inside the sliding cavity. The inner tube slide is connected to a slide pin, which extends out from the sliding groove.

[0008] The spring outer tube is fixedly connected to the outer tube fixing seat at its rear end;

[0009] The inner spring tube passes through the outer spring tube and the outer tube fixing seat and is fixedly connected to the inner tube slide. The front end of the inner spring tube is connected to the pliers head. A pull cable is installed inside the inner spring tube. The front end of the pull cable is connected to the pliers head. The rear end of the pull cable is connected to the slip ring.

[0010] The rear handle has its front end fixedly connected to the rear end of the front handle, and the slip ring is disposed on the rear handle.

[0011] Furthermore, a front positioning groove is provided at the front of the slide groove, and a rear positioning groove is provided at the rear of the slide groove, both of which are connected to the slide groove.

[0012] The slide pin moves along the slide groove to the front position and then rotates to enter the positioning front groove to restrict the slide pin from axial movement in the front position;

[0013] The slide pin moves along the slide groove to the front position and then rotates to enter the positioning rear groove to restrict the slide pin from axial movement in the rear position.

[0014] Furthermore, the inner tube slide has an inner tube fixing hole and a pin hole, the pin hole is an internal thread hole, the slide pin is provided with a connecting rod, and the connecting rod is provided with an external thread;

[0015] The rear end of the inner spring tube is inserted into the axial through hole, and the sliding pin is connected to the radial through hole via the connecting rod. The lower end of the connecting rod radially abuts against the inner spring tube.

[0016] Furthermore, an outer tube fixing hole is provided in the outer tube fixing seat, the rear end of the spring outer tube is inserted into the outer tube fixing hole, and the spring outer tube and the outer tube fixing seat are welded together.

[0017] Furthermore, the outer tube fixing seat has a T-shaped structure, which includes a plug post and a baffle. The plug post is provided with barbs, and there is an interference fit between the plug post and the slide cavity. The front end face of the baffle abuts against the end face of the slide cavity, and the rear end face of the baffle is adapted to cooperate with the inner tube slide.

[0018] Furthermore, a protective sleeve is provided at the rear end of the inner tube slide;

[0019] When the inner tube slide is in the forward position, the rear end of the sheath extends into the rear handle, and the cable passes through the sheath.

[0020] Furthermore, the rear end of the inner spring tube extends from the inner tube slide, and a protective sleeve is fitted onto the extended section of the rear end of the inner spring tube, with the protective sleeve being fixedly connected to the inner spring tube.

[0021] Furthermore, a booster tube is provided on the slip ring, with one end of the booster tube connected to the slip ring and the other end fixedly connected to the cable.

[0022] The beneficial effects of this utility model are:

[0023] This utility model of a retractable biopsy forceps can extend a thinner spring inner tube, which facilitates bending of the endoscope. The inner and outer tube structure of the retractable biopsy forceps allows the spring outer tube to match a larger endoscope forceps channel, and also allows the spring inner tube to match a smaller forceps head. The retractable biopsy forceps is equipped with a sliding pin, eliminating the need for pushing the spring tube or handle to press the forceps head against the sample tissue, as with ordinary biopsy forceps. Instead, by pushing the sliding pin, the spring inner tube extends, causing the forceps head to press against the sample tissue for sampling. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of a standard biopsy forceps;

[0026] Figure 2 This is a schematic diagram of the retractable biopsy forceps of this utility model;

[0027] Figure 3 This is a partial view of the front handle (with inner tube slide);

[0028] Figure 4 This is a structural diagram showing the connection between the slide pin and the inner tube slide.

[0029] Figure 5 This is a partial schematic diagram of the front handlebar;

[0030] Figure 6 This is a partial view of the inner tube slide in the position in front of the front handle;

[0031] Among them, 10, handle; 11, spring tube; 12, cable; 13, clamp head; 14, slip ring;

[0032] 2. Rear handle; 21. Slip ring;

[0033] 3. Spring outer tube; 4. Spring inner tube;

[0034] 5. Front handle; 51. Slide groove; 52. Front positioning groove; 53. Rear positioning groove;

[0035] 6. Inner tube slide; 61. Slide pin;

[0036] 7. Outer tube fixing seat; 71. Barbs;

[0037] 8. Booster tube;

[0038] 9. Pliers head; 91. Cable. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] This application provides a retractable biopsy forceps, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0041] To address the technical problem in existing biopsy forceps where the forceps head cannot extend or retract, hindering sampling operations, one embodiment of this application provides a retractable-head biopsy forceps. This is described in detail below.

[0042] like Figures 2 to 6 As shown, a retractable biopsy forceps includes...

[0043] A front handle 5 has a sliding cavity inside it, which extends through the front handle 5 in a front-to-back direction. A sliding groove 51 is formed on the side wall of the front handle 5. An outer tube fixing seat 7 is fixedly installed at the front end of the sliding cavity. An inner tube slide 6 is installed inside the sliding cavity. The inner tube slide 6 is connected to a slide pin 61, which extends out from the sliding groove 51.

[0044] The spring outer tube 3 is fixedly connected to the outer tube fixing seat 7 at its rear end;

[0045] The inner spring tube 4 passes through the outer spring tube 3 and the outer tube fixing seat 7 and is fixedly connected to the inner tube slide 6. The front end of the inner spring tube 4 is connected to the pliers head 9. A pull cable 91 is installed inside the inner spring tube 4. The front end of the pull cable 91 is connected to the pliers head 9. The rear end of the pull cable 91 is connected to the slip ring 21.

[0046] The rear handle 2 is fixedly connected to the rear end of the front handle 5, and the slip ring 21 is disposed on the rear handle 2.

[0047] Specifically, as an optional implementation method in this embodiment, such as Figure 3 As shown, the slide groove 51 is provided with a front positioning groove 52 at the front and a rear positioning groove 53 at the rear. Both the front positioning groove 52 and the rear positioning groove 53 are connected to the slide groove 51.

[0048] The slide pin 61 moves along the slide groove 51 to the front position and then rotates into the positioning front groove 52 to restrict the slide pin 61 from axial movement in the front position;

[0049] The slide pin 61 moves along the slide groove 51 to the front position and then rotates into the positioning rear groove 53 to restrict the axial movement of the slide pin 61 in the rear position.

[0050] In this embodiment, there is a pair of positioning front grooves 52 and positioning rear grooves 53, which are located on both sides of the slide groove 51, so as to facilitate the sliding pin 61 to slide in.

[0051] After the slide pin 61 enters the positioning front groove 52 and the positioning rear groove 53, it restricts the displacement of the slide pin 61 and the inner tube slide 6 in the front handle 5.

[0052] like Figure 4 As shown, the slide pin 61 is in the front position of the front handle 5, which drives the inner spring tube 4 and the clamp head 9 to extend forward.

[0053] Specifically, as an optional implementation method in this embodiment, such as Figure 5 As shown, the inner tube slide 6 has an inner tube fixing hole and a pin hole. The pin hole is an internal thread hole. The slide pin 61 is provided with a connecting rod, and the connecting rod is provided with an external thread.

[0054] The rear end of the inner spring tube 4 is inserted into the axial through hole, and the sliding pin 61 is connected to the radial through hole via the connecting rod. The lower end of the connecting rod radially abuts against the inner spring tube 4.

[0055] In this embodiment, the inner tube slide 6 has a cylindrical structure to fit the cylindrical slide cavity.

[0056] Specifically, as an optional implementation method in this embodiment, such as Figures 2 to 6 As shown, an outer tube fixing hole is provided in the outer tube fixing seat 7, and the rear end of the spring outer tube 3 is inserted into the outer tube fixing hole. The spring outer tube 3 and the outer tube fixing seat 7 are welded together.

[0057] Specifically, in this embodiment, as follows: Figure 5 and Figure 6 As shown, the outer tube fixing seat 7 has a T-shaped structure, which includes a plug post and a baffle. The plug post is provided with barbs 71. The plug post and the slide cavity are interference fit. The front end face of the baffle abuts against the end face of the slide cavity. The rear end face of the baffle is adapted to cooperate with the inner tube slide 6.

[0058] In this embodiment, the outer tube fixing seat 7 is a stainless steel metal part, which is pressed into the front handle 5 by pneumatic stamping, and the spring outer tube 3 and the outer tube fixing seat 7 are connected by laser welding.

[0059] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, a protective sleeve is provided at the rear end of the inner tube slide 6; when the inner tube slide 6 is in the front position, the rear end of the protective sleeve extends into the rear handle 2, and the cable 91 passes through the protective sleeve.

[0060] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, the rear end of the inner spring tube 4 extends from the inner tube slide 6, and a protective sleeve is fitted onto the extended section of the rear end of the inner spring tube 4. The protective sleeve is fixedly connected to the inner spring tube 4.

[0061] like Figure 2 As shown, a cylindrical boss is formed at the rear end of the inner tube slide 6. The outer diameter of the cylindrical boss is the same as the outer diameter of the sheath tube. The front end face of the sheath tube abuts against the end face of the cylindrical boss to avoid a step between them, so that the inner tube slide 6 moves more smoothly when it moves to the rear position. The sheath tube is always inside the rear handle 2 and can also guide the front handle 5 to move to the rear.

[0062] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, a booster tube 8 is provided on the slip ring 21. One end of the booster tube 8 is connected to the slip ring 21, and the other end is fixedly connected to the cable 91.

[0063] The booster tube 8 is a metal tube. The booster tube 8 drives the cable 91, which facilitates the slip ring 21 to move the cable 91 back and forth. The booster tube 8 provides support for the cable 91.

[0064] Working principle of this retractable head biopsy forceps:

[0065] When the slide pin 61 is in the slide groove 51, the slide pin 61 can drive the inner tube slide 6 to move back and forth in the front handle 5, thereby driving the spring inner tube 4 and the pliers head 9 to move back and forth through the inner tube slide 6, that is, driving the pliers head 9 to extend and retract.

[0066] When the slide pin 61 moves the inner tube slide 6 to the rear position, the slide pin 61 rotates into the positioning rear groove 53, locking the inner tube slide 6 in the rear position. When the slide pin 61 moves the inner tube slide 6 to the front position, the slide pin 61 rotates into the positioning front groove 52, locking the inner tube slide 6 in the front position.

[0067] The product enters the human body through the endoscope channel. By pushing and pulling the sliding pin 61, the extension and retraction of the inner spring tube 4 and the outer spring tube 3 are controlled. The inner spring tube 4 is telescopic, which facilitates bending of the endoscope.

[0068] How to use retractable biopsy forceps:

[0069] 1. Instrument insertion: Gently pull the slip ring 21 to close the forceps head 9 and insert the product into the endoscope channel.

[0070] 2. Extending the inner spring tube 4: Rotate the sliding pin 61 to move it out of the positioning groove 53, allowing it to enter the sliding groove 51. Then push the sliding pin 61 forward until it reaches the end of the front end of the sliding groove 51, causing the distal inner spring tube 4 to extend out of the outer spring tube 3. Rotate the sliding pin 61 into the positioning groove 52 for locking. Continue pushing the outer spring tube 3 until the clamp head 9 is fully exposed in the clamp channel hole, then bend the endoscope.

[0071] 3. Retracting the inner spring tube 4: Rotate the slide pin 61, and the slide pin 61 enters the slide groove 51 from the positioning front groove 52. Pull the slide pin 61 back along the slide groove 51 until the slide pin 61 moves to the end of the rear end of the slide groove 51, so that the far end of the inner spring tube 4 retracts into the outer spring tube 3. Rotate the slide pin 61 into the positioning rear groove 53 for locking.

[0072] 4. Sampling operation: Fully expose the product clamp head 9 through the clamping hole, approach the sampling position, rotate the sliding pin 61, align it with the sliding groove 51 of the front handle 5, and push the sliding pin 61 forward until the clamp head 9 touches the sampled tissue. Pull the sliding ring 21 backward to close the clamp head 9 and bite the tissue to perform the sampling operation.

[0073] 5. Instrument withdrawal: Keep the forceps 9 closed and withdraw the product from the endoscope.

[0074] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0075] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0076] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0077] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0078] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0079] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0080] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A retractable-head biopsy forceps, characterized in that, include A front handle (5) has a sliding cavity inside it, which extends through the front handle (5) in the front and back direction. A sliding groove (51) is provided on the side wall of the front handle (5). An outer tube fixing seat (7) is fixedly provided at the front end of the sliding cavity. An inner tube slide (6) is provided inside the sliding cavity. The inner tube slide (6) is connected to a slide pin (61). The slide pin (61) extends out from the sliding groove (51). The spring outer tube (3) is fixedly connected to the outer tube fixing seat (7) at its rear end; The inner spring tube (4) passes through the outer spring tube (3) and the outer tube fixing seat (7) and is fixedly connected to the inner tube slide (6). The front end of the inner spring tube (4) is connected to the pliers head. A cable is installed inside the inner spring tube (4). The front end of the cable is connected to the pliers head, and the rear end of the cable is connected to the slip ring (21). The rear handle (2) is fixedly connected to the rear end of the front handle (5), and the slip ring (21) is set on the rear handle (2).

2. The retractable head biopsy forceps according to claim 1, characterized in that, The slide (51) is provided with a front positioning groove (52) at the front and a rear positioning groove (53) at the rear. Both the front positioning groove (52) and the rear positioning groove (53) are connected to the slide (51). The slide pin (61) moves along the slide groove (51) to the front position and then rotates into the positioning front groove (52) to restrict the slide pin (61) from axial movement in the front position; The slide pin (61) moves along the slide groove (51) to the front position and then rotates into the positioning rear groove (53) to restrict the slide pin (61) from axial movement in the rear position.

3. The retractable head biopsy forceps according to claim 1, characterized in that, The inner tube slide (6) has an inner tube fixing hole and a pin hole. The pin hole is an internal thread hole. The slide pin (61) is provided with a connecting rod, and the connecting rod is provided with an external thread. The rear end of the inner spring tube (4) is inserted into the axial through hole, and the sliding pin (61) is connected to the radial through hole via the connecting rod. The lower end of the connecting rod radially abuts against the inner spring tube (4).

4. The retractable head biopsy forceps according to claim 1, characterized in that, The outer tube fixing seat (7) has an outer tube fixing hole, the rear end of the spring outer tube (3) is inserted into the outer tube fixing hole, and the spring outer tube (3) and the outer tube fixing seat (7) are welded together.

5. The retractable head biopsy forceps according to claim 4, characterized in that, The outer tube fixing seat (7) is a T-shaped structure, which includes a plug-in post and a baffle. The plug-in post is provided with barbs (71). The plug-in post and the slide cavity are interference fit. The front end face of the baffle abuts against the end face of the slide cavity. The rear end face of the baffle is adapted to cooperate with the inner tube slide (6).

6. The retractable head biopsy forceps according to claim 1, characterized in that, A protective sleeve is provided at the rear end of the inner tube slide (6); When the inner tube slide (6) is in the front position, the rear end of the sheath extends into the rear handle (2), and the cable passes through the sheath.

7. The retractable head biopsy forceps according to claim 6, characterized in that, The rear end of the inner spring tube (4) extends from the inner tube slide (6), and a protective sleeve is fitted onto the extended section at the rear end of the inner spring tube (4). The protective sleeve is fixedly connected to the inner spring tube (4).

8. The retractable head biopsy forceps according to claim 6, characterized in that, A booster tube (8) is provided on the slip ring (21), one end of which is connected to the slip ring (21) and the other end is fixedly connected to the cable.

Images