Compound puncture and grasping forceps

Abstract

The present invention discloses a composite puncture grasping forceps, comprising: a grasping forceps tube, a puncture tube sleeved on the outside of the grasping forceps tube, a push-pull rod fixedly connected to the puncture tube and used for driving the puncture tube to move synchronously, a rotating seat movably connected to the push-pull rod and suitable for driving the push-pull rod to perform rotational movement, and a handle part rotatably matched with the rotating seat; a grasping forceps head suitable for performing opening and closing movements is provided at one end of the grasping forceps tube away from the handle part, and the puncture head is formed at one end of the puncture tube away from the handle part; and the grasping forceps tube is connected to a pull rod extending from the handle part into the rotating seat after passing through the push-pull rod and the rotating seat, and a movable handle connected to the pull rod for driving the grasping forceps head to perform opening and closing movements is provided on the handle part.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a composite puncture and grasping forceps. Background Art

[0002] Puncture needles and grasping forceps are two commonly used medical instruments in minimally invasive surgery. Puncture needles can be used to puncture organs, tissues or inject drugs, and grasping forceps are usually used in conjunction with laparoscopes for various laparoscopic surgeries. Of course, puncture needles are sometimes used during laparoscopic surgery, which can be used for puncture and drilling before opening the abdomen or for penetrating organs or tissues in the abdominal cavity during surgery.

[0003] For the above two instruments, if they are used separately, that is, they need to be replaced during the operation, on the one hand, the replacement of medical instruments has the problem of low operating efficiency, and on the other hand, it will also cause an increase in the overall surgical cost. Because for laparoscopic surgery, most of the instruments used are disposable instruments, and the comprehensive cost of the various instruments used will be settled in the patient's surgical cost. Reducing the surgical cost by reducing the types and quantity of surgical instruments can also reduce the patient's cost pressure and ease the doctor-patient relationship.

[0004] In view of the above situation, an integrated composite grasping forceps that can simultaneously have the functions of puncture and grasping has appeared in the prior art, such as an active forceps for puncture disclosed in announcement number CN205831834U, which combines the puncture function and the sampling biopsy function by setting a left tip and a right tip at the distal position of a pair of forceps heads of the biopsy forceps, so that the biopsy forceps punctures the tissue organ through the distal tip part, and then performs tissue sampling biopsy. Under such a structure, the overall active forceps has the puncture function synchronously, achieving the effect of a dual-purpose instrument. However, it has been found that in this case, the left tip and the right tip present a triangular pyramid, a quadrangular pyramid or a multi-sided pyramid structure when the forceps head is closed. Although it can effectively realize the puncture function, in the process of clamping the tissue, the conical part existing in the circumferential direction is likely to cause unexpected damage to the tissue, that is, the safety is low in the process of clamping the tissue. Summary of the invention

[0005] The purpose of the present invention is to provide a composite puncture and grasping forceps to improve the technical problem of the safety of the puncture and grasping forceps in the process of grasping tissue.

[0006] The composite puncture and grasping forceps of the present invention is realized as follows:

[0007] A composite puncture and grasping forceps, comprising:

[0008] A grasping forceps tube, a puncture tube sleeved on the outside of the grasping forceps tube, a push-pull rod fixedly connected to the puncture tube and used to drive the puncture tube to move synchronously, a rotating seat movably connected to the push-pull rod and suitable for driving the push-pull rod to rotate, and a handle portion rotatably matched with the rotating seat;

[0009] The end of the grasping forceps tube away from the handle portion is provided with a grasping forceps head suitable for opening and closing movements, and the end of the puncture tube away from the handle portion is formed with a puncture head; and

[0010] The grasping forceps tube passes through the push-pull rod and the rotating seat and is connected to the pull rod extending from the handle portion into the rotating seat. The handle portion is provided with a movable handle connected to the pull rod for driving the grasping forceps head to open and close.

[0011] In an optional embodiment of the present invention, a pull rod seat is provided between the grasping forceps tube and the pull rod;

[0012] The grasping clamp tube is fixedly connected to the pull rod seat; and

[0013] The pull rod is rotatably matched with the pull rod seat;

[0014] The end of the pull rod connected to the pull rod seat is formed with an annular groove, and the end of the pull rod seat facing the pull rod is formed with a pair of clamping joints suitable for clamping into the annular groove;

[0015] The rod seat is arranged in the rotating seat, and is suitable for moving along the axial direction of the rod in the rotating seat; and the rod seat is suitable for rotating relative to the rod when performing synchronous rotational movement with the rotating seat.

[0016] In an optional embodiment of the present invention, a snap-in groove for snap-in connection with the rotating seat is formed in the handle portion; and

[0017] The rotating seat is integrally formed with a connector for inserting into the handle portion; and the outer wall of the connector is formed with an annular clamping groove, and the groove wall of the clamping groove is formed with an annular protruding clamping head;

[0018] The clamping head is clamped and matched with the clamping slot.

[0019] In an optional embodiment of the present invention, an annular ratchet wheel is fixedly connected to the connecting head; and

[0020] A ratchet limiting wheel suitable for matching with an annular ratchet wheel is fixedly connected to the handle portion;

[0021] The pull rod passes through the ratchet limiting wheel and the annular ratchet wheel in sequence and is connected to the pull rod seat.

[0022] In an optional embodiment of the present invention, the movable handle is provided with an eccentric wheel connected to the pull rod; and

[0023] A connecting pin is arranged between the movable handle and the handle portion, and an elastic connecting body is arranged between the movable handle and the handle portion.

[0024] In an optional embodiment of the present invention, a strip-shaped limiting groove is provided on the push-pull rod along its axial displacement direction, and a positioning notch communicating with the strip-shaped limiting groove is provided on one of the groove walls of the strip-shaped limiting groove;

[0025] An elastic connector is further provided between the rotating seat and the push-pull rod; a movable block is movably connected in the rotating seat, and a positioning block suitable for extending into the strip-shaped limiting groove is provided on the movable block, and the positioning block is suitable for being embedded in the positioning notch to form a stop for the axial movement of the push-pull rod; and

[0026] A shifting block is movably mounted on the rotating seat; the shifting block is connected to the movable block, that is, the shifting block is suitable for driving the movable block to move so as to switch the matching and disengagement between the positioning block and the positioning notch.

[0027] In an optional embodiment of the present invention, the rotating seat includes an upper seat body and a lower seat body suitable for matching and assembling; wherein

[0028] The upper seat body is movably connected to the movable block and the shifting block at the same time; and

[0029] The lower seat body is connected with the elastic connecting piece.

[0030] In an optional embodiment of the present invention, the end surface of the movable block facing away from the strip-shaped limiting groove is also movably connected with a sliding block; the end surface of the sliding block facing the shifting block is provided with a protruding limiting column for inserting into the shifting block; and

[0031] The shift block is formed with an inclined slot which is distributed in an inclined shape relative to the axial movement direction of the push-pull rod;

[0032] The limiting column part extends into the inclined slide groove to form a sliding fit between the limiting column and the inclined slide groove;

[0033] When the shift block moves along the axial direction of the push-pull rod, the limit column moves in the inclined slide groove to make the sliding block move relative to the movable block along a moving direction perpendicular to the shift block.

[0034] In an optional embodiment of the present invention, a receiving cavity is formed in the movable block and located on both sides of the limiting column, and a spring body is embedded in each receiving cavity; and

[0035] Each elastic body is axially limited between the cavity wall of the accommodating cavity and the sliding block;

[0036] When the sliding block moves relative to the movable block along a moving direction perpendicular to the shifting block, one of the pair of elastic bodies located on both sides of the limiting column is compressed.

[0037] In an optional embodiment of the present invention, the shift block includes a shift seat connected to the movable block and a trigger portion integrally connected to the shift seat; and

[0038] The rotating seat is formed with an assembly groove for matching with the toggle seat; and the rotating seat is also provided with a card interface for matching with the contact part;

[0039] One side of the trigger portion is provided with an elastic card block suitable for abutting against the side wall of the card interface from one side of the assembly groove.

[0040] By adopting the above technical solution, the present invention has the following beneficial effects: the composite puncture grasping forceps of the present invention, through the cooperation of the grasping forceps tube and the puncture tube sleeved on the outside of the grasping forceps tube, the relative movement between the puncture tube and the grasping forceps tube switches the execution of the puncture function or the grasping forceps function, thereby realizing the dual-purpose function of the overall puncture grasping forceps. And through the cooperation of the push-pull rod, the rotating seat and the shifting block, the push-pull rod can make axial movement under the action of the shifting block and the movable block, thereby driving the synchronous movement of the puncture tube. In this structure, the puncture tube and the grasping forceps tube can switch to different use states, so that the puncture grasping forceps can realize the two independent functions of puncture and grasping tissue during use, and they do not interfere with each other. In this structure, the puncture tube can be prevented from causing unexpected damage to the tissue during the process of grasping the tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the structure of the composite puncture and grasping forceps of the present invention;

[0042] Figure 2 The partial structure diagram of the composite puncture and grasping forceps of the present invention is shown in FIG. Figure 1 ;

[0043] Figure 3 The partial structure diagram of the composite puncture and grasping forceps of the present invention is shown in FIG. Figure 2 ;

[0044] Figure 4 The partial structure diagram of the composite puncture and grasping forceps of the present invention is shown in FIG. Figure 3 ;

[0045] Figure 5 It is a partial cross-sectional structural schematic diagram of the composite puncture and grasping forceps of the present invention;

[0046] Figure 6 It is a schematic diagram of the matching structure of the push-pull rod and the rotating seat of the composite puncture and grasping forceps of the present invention;

[0047] Figure 7 It is a schematic structural diagram of the movable block of the composite puncture and grasping forceps of the present invention;

[0048] Figure 8 It is a schematic diagram of the coordination structure of the movable block and the push-pull rod of the composite puncture and grasping forceps of the present invention in the first viewing angle;

[0049] Fig. 9 It is a schematic diagram of the coordination structure of the movable block and the push-pull rod of the composite puncture and grasping forceps of the present invention at a second viewing angle;

[0050] Fig.10 It is a schematic diagram of the matching structure of the limit column and the inclined slide groove of the shift block of the composite puncture and grasping forceps of the present invention;

[0051] Fig.11 It is a schematic diagram of the matching structure of the rotating seat and the shifting block of the composite puncture and grasping forceps of the present invention;

[0052] Fig.12 It is a schematic diagram of the matching structure of the rotating seat, the push-pull rod and the elastic connecting piece of the composite puncture and grasping forceps of the present invention;

[0053] Fig.13 It is a schematic diagram of the structure of the composite puncture and grasping forceps of the present invention in cooperation with the puncture function;

[0054] Fig.14 It is a schematic structural diagram of the composite puncture grasping forceps of the present invention under the function of the grasping forceps;

[0055] Fig.15 It is a schematic diagram of the process from the corresponding grasping function state to the puncturing function state of the composite puncture grasping forceps of the present invention.

[0056] In the figure: puncture tube 1, grasping forceps tube 2, puncture head 11, grasping forceps head 21, push-pull rod 3, strip-shaped limiting groove 31, positioning notch 32, rotating seat 4, upper seat body 41, lower seat body 42, assembly groove 43, card interface 45, installation cavity 46, limiting groove 47, elastic connecting piece 5, movable block 6, positioning block 61, limiting protrusion 62, sliding block 63, limiting column 64, accommodating cavity 65, spring body 66, dial block 7, dial seat 71, trigger part 72, elastic card block 73, inclined slide groove 75, handle part 8, pull rod 9, annular groove 91, movable handle 100, pull rod seat 200, card joint 201, card groove 81, card head 82, card groove 49, annular ratchet wheel 301, ratchet limiting wheel 302, eccentric wheel 700, connecting pin 500, elastic connecting body 600, connecting head 48. DETAILED DESCRIPTION

[0057] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0058] See also Figures 1 to 15As shown, this embodiment provides a composite puncture grasping forceps, a grasping forceps tube 2, a puncture tube 1 sleeved on the outside of the grasping forceps tube 2, a push-pull rod 3 fixedly connected to the puncture tube 1 and used to drive the puncture tube 1 to move synchronously, a rotating seat 4 movably connected to the push-pull rod 3 and suitable for driving the push-pull rod 3 to rotate, and a handle portion 8 rotatably matched with the rotating seat 4; the puncture tube 1 and the grasping forceps tube 2 can move relative to each other. The end of the grasping forceps tube 2 away from the handle portion 8 is provided with a grasping forceps head 11 suitable for opening and closing movements, and the end of the puncture tube 1 away from the handle portion 8 is formed with the puncture head 11.

[0059] It should be noted that the puncture tube 1 and grasping forceps tube 2 here can adopt conventional puncture tubes 1 and grasping forceps tubes 2. When puncture is required, it is only necessary to move the puncture tube 1 so that the grasping forceps tube 2 and the grasping forceps head 21 connected to the grasping forceps tube 2 are completely retracted into the puncture tube 1 for a linear puncture operation. When the grasping forceps head 21 is required to perform a tissue grabbing operation, it is also only necessary for the puncture tube 1 to make an axial movement so that the grasping forceps head 21 can extend to the outside of the puncture tube 1. At this time, only the grasping forceps head 21 can contact the tissue, while the puncture tube 1 is covered on the outer wall of the grasping forceps tube 2 and will not contact the tissue, thus avoiding unexpected damage to the tissue. Therefore, the puncture tube 1, grasping forceps tube 2 and grasping forceps head 21 used in this application can all be conventional mature structures, and it is only necessary to connect the puncture tube 1 and the grasping forceps tube 2 for use.

[0060] Based on the above structure, the grasping forceps tube 2 passes through the push-pull rod 3 and the rotating seat 4 and is connected to the pull rod 9 extending from the handle part 8 into the rotating seat 4, and the handle part 8 is provided with a movable handle 100 connected to the pull rod 9 for driving the grasping forceps head 21 to open and close.

[0061] Furthermore, a rod seat 200 is provided between the gripper tube 2 and the rod 9; the gripper tube 2 is fixedly connected to the rod seat 200; and the rod 9 and the rod seat 200 are rotatably matched. Here, an optional situation is given in conjunction with the accompanying drawings, in which the rotational match between the rod 9 and the rod seat 200 is achieved through the following structure:

[0062] An annular groove 91 is formed at the end of the pull rod 9 connected to the pull rod seat 200, and a pair of clamping joints 201 suitable for being inserted into the annular groove 91 are formed at the end of the pull rod seat 200 facing the pull rod 9; when the pull rod seat 200 and the pull rod 9 are assembled in place, a part of the pull rod 9 is inserted into the pull rod seat 200, so that the two are effectively connected and will not be separated. It should be noted that the pull rod seat 200 is arranged in the rotating seat so that the pull rod seat 200 can rotate synchronously with the rotation of the rotating seat 4, and the pull rod seat 200 is suitable for axial movement along the pull rod 9 in the rotating seat 4. During this process, when the pull rod seat 200 performs axial movement, the rotating seat 4 remains stationary. As for the rotation of the rotating seat 4, combined with the actual operation process, the rotating seat 4 can be directly rotated by the fingers of medical staff. When the rod seat 200 rotates synchronously with the rotating seat 4, the rod seat 200 rotates relative to the rod 9. That is to say, based on this structure, when the rod seat 200 rotates with the rotating seat 4, the rod 9 does not rotate synchronously, but can be fixed in the handle 8. In general, the rod 9 and the rod seat 200 can generate synchronous axial movement, but the two do not perform synchronous rotation.

[0063] In addition, it should be noted that the rotational cooperation relationship between the rotating seat 4 and the handle portion 8 is achieved through the following structure:

[0064] A snap-in groove 81 for snapping in the rotating seat 4 is formed in the handle portion 8; and the rotating seat 4 is integrally formed with a connecting head 48 for being inserted into the handle portion 8; and the outer wall of the connecting head 48 is formed with an annular snap-in groove 49, and the groove wall of the snap-in groove 81 is formed with an annular protruding snap-in head 82; the snap-in head 82 and the snap-in groove 49 are in a snap-fit ​​fit suitable for relative rotation; under such a structure, the rotating seat 4 and the handle portion 8 can maintain an effective connection relationship to avoid the two from detaching from each other, but when the rotating seat 4 makes a rotational motion, the handle portion 8 can remain relatively still and will not produce a follow-up rotation behavior.

[0065] In order to control the progress of the rotating seat 4 when the medical staff manually turns the rotating seat 4, to prevent the rotating seat 4 from rotating too fast and out of control, and to improve the accuracy of the rotating seat 4 rotation adjustment, the present embodiment is designed to have an annular ratchet wheel 301 fixedly connected to the connector 48; and a ratchet limit wheel 302 suitable for matching with the annular ratchet wheel 301 is fixedly connected in the handle portion 8, and the matching surface between the annular ratchet wheel 301 and the ratchet limit wheel 302 is a plurality of tooth grooves arranged continuously in the circumferential direction. When the rotating seat 4 rotates, the ratchet limit wheel 302 does not rotate, while the annular ratchet wheel 301 rotates relative to the ratchet limit wheel 302, and a "click" sound can be generated during the rotation process, thereby prompting the medical staff the rotation stroke; the pull rod 9 passes through the ratchet limit wheel 302 and the annular ratchet wheel 301 in turn and is connected to the pull rod seat 200. In this embodiment, the rotation of the grasping forceps tube 2 and the puncture tube 1 is synchronously achieved by the rotation of the rotating seat 4. In this way, the operating angle can be adjusted by the rotation of the rotating seat 4 not only during the puncture process but also during the process of grasping tissue, thereby improving the convenience and accuracy of the surgical operation.

[0066] In addition, for the driving process of the opening and closing movement of the grasping forceps head 21, the method adopted in this embodiment is as follows: an eccentric wheel 700 connected to the pull rod 9 is provided on the movable handle 100, and the setting of the eccentric wheel 700 here enables the movable handle 100 to apply force more accurately and labor-savingly in the process of pulling the pull rod 9. A connecting pin 500 is provided between the movable handle 100 and the handle portion 8, and an elastic connector 600 is provided between the movable handle 100 and the handle portion 8. Under such a structure, by pinching the movable handle 100 by hand, the movable handle 100 drives the pull rod 9 to move synchronously, thereby making it possible to pull the pull rod seat 200 synchronously with the pull rod 9, and finally realize the opening and closing movement of the grasping forceps head 21 provided at the far hand end of the grasping forceps tube 2 connected thereto by controlling the axial displacement direction of the pull rod 9 and the pull rod seat 200.

[0067] Based on the above structure, the puncture and grasping functions of the composite puncture and grasping forceps of this embodiment are switched and adjusted through the following structure:

[0068] Generally speaking, the above adjustment process is achieved by the push-pull tube, the rotating seat 4 and the shifting block 7 used in conjunction with each other.

[0069] Next, the following is a detailed description in conjunction with the accompanying drawings. Generally speaking, the push-pull rod 3 is used to be fixedly connected to the puncture tube 1 of the puncture grasping forceps, and is used to drive the puncture tube 1 to move synchronously through the axial displacement of the push-pull rod 3; a strip-shaped limit groove 31 is provided on the push-pull rod 3 along its axial displacement direction, and a positioning notch 32 connected to the strip-shaped limit groove 31 is provided on one of the groove walls of the strip-shaped limit groove 31. Here, in order to enable the push-pull rod 3 to cooperate with the normal use of the puncture tube 1 and the grasping forceps tube 2, a through hole suitable for the grasping forceps tube 2 to pass through is also provided in the push-pull rod 3 along its axial displacement direction. The puncture tube 1 and the through hole are fixedly connected, so that the axial movement of the push-pull rod 3 can drive the synchronous movement of the puncture tube 1, while the grasping forceps tube 2 is in a movable cooperation with the through hole, so that the axial movement of the push-pull rod 3 will not drive the grasping forceps tube 2 to move synchronously, that is, the state of the grasping forceps tube 2 can be kept unaffected by the push-pull rod 3.

[0070] The rotating seat 4 is movably connected with the push-pull rod 3, and the rotating seat 4 is suitable for driving the push-pull rod 3 to perform synchronous rotational motion. More specifically, the rotating seat 4 includes an upper seat body 41 and a lower seat body 42 suitable for matching and assembling; the end surfaces of the upper seat body 41 and the lower seat body 42 facing each other are respectively formed with assembly cavities for matching the push-pull rod 3. The specific assembly cavity here is used to match the part of the push-pull rod 3 formed with the strip-shaped limiting groove 31.

[0071] Furthermore, an elastic connector 5 is provided between the rotating seat 4 and the push-pull rod 3; the lower seat body 42 is connected to the elastic connector 5. In addition, the end surface of the push-pull rod 3 away from the strip-shaped limiting groove 31 is also formed with a concave matching groove 33 for matching the elastic connector 5. The elastic connector 5 here can be a spring. And the elastic connector 5 here can form an elastic pulling force during the axial movement of the push-pull rod 3.

[0072] Furthermore, a movable block 6 is movably connected in the rotating seat 4, and a positioning block 61 is provided on the movable block 6, which is suitable for extending into the strip-shaped limiting groove 31. The positioning block 61 is suitable for being embedded in the positioning notch 32 to form a stop for the axial movement of the push-pull rod 3. Here, when the positioning block 61 is embedded in the positioning notch 32, the push-pull rod 3 cannot drive the puncture tube 1 to make synchronous axial movement. Only when the positioning block 61 is disengaged from the positioning notch 32, the push-pull rod 3 can drive the puncture tube 1 to move synchronously. That is to say, the cooperation and disengagement of the positioning block 61 and the positioning notch 32 become the switching adjustment point of the axial movement state of the push-pull rod 3. The positioning block 61 here is also suitable for abutting against the end of the push-pull rod 3 away from the puncture head 11 of the puncture tube 1. Specifically, the end of the push-pull rod 3 used in this embodiment away from the puncture head 11 of the puncture tube 1 includes two staggered end heads, one end head is L-shapedly recessed relative to the other end head, and the positioning block 61 is suitable for abutting against the end head with the L-shaped recess among the two end heads.

[0073] The rotating seat 4 is also movably connected to a shift block 7, which is connected to the movable block 6. Specifically, the shift block 7 is suitable for driving the movable block 6 to move so as to switch the cooperation and disengagement between the positioning block 61 and the positioning notch 32. The upper seat body 41 is movably connected to the movable block 6 and the shift block 7 at the same time. With reference to the accompanying drawings, the shift block 7 used in the present embodiment includes a shift seat 71 connected to the movable block 6 and a trigger portion 72 integrally connected to the shift seat 71; and a mounting groove 43 for matching the shift seat 71 is formed on the rotating seat 4; and a card interface 45 for matching the trigger portion 72 is also provided on the rotating seat 4; one side of the trigger portion 72 is provided with an elastic card block 73 suitable for abutting the side wall of the card interface 45 from one side of the mounting groove 43, one end of the elastic card block 73 is connected to the trigger portion 72, and the other end is used to abut the side wall of the card interface 45 is a movable end, and a receiving groove suitable for the movable end to be embedded is formed inside the trigger portion 72. Under this structure, when the trigger portion 72 passes through the card interface 45, the movable end will be temporarily embedded in the receiving groove, and when the trigger portion 72 is disengaged from the card interface 45, the movable end will extend to the outside of the receiving groove.

[0074] Next, in more detail, a mounting cavity 46 for accommodating the movable block 6 is provided in the upper seat body 41; a limiting groove 47 perpendicular to the axial displacement direction of the push-pull rod 3 is formed on the cavity wall of the mounting cavity 46; and a limiting protrusion 62 is formed on the movable block 6 to engage with the limiting groove 47. In this structure, the movable track of the entire movable block 6 in the upper seat body 41 is limited, and it can only move along the axial displacement direction perpendicular to the push-pull rod 3.

[0075] The matching relationship between the movable block 6 and the shifting block 7 is achieved through the following structure:

[0076] The end face of the movable block 6 away from the strip-shaped limiting groove 31 is also movably connected with a sliding block 63; the end face of the sliding block 63 facing the shifting block 7 is provided with a convex limiting column 64 for inserting into the shifting block 7, and the limiting column 64 and the sliding block 63 here form a fixed connection relationship. In addition, an oblique sliding groove 75 is formed in the shifting block 7, which is distributed in an inclined shape relative to the axial displacement direction of the push-pull rod 3. It should be noted here that the end of the oblique sliding groove 75 facing the puncture head 11 is inclined toward the side of the positioning notch 32 on the push-pull rod 3 relative to the axial displacement direction of the push-pull rod 3. The limiting column 64 partially extends into the oblique sliding groove 75 to form a sliding fit between the limiting column 64 and the oblique sliding groove 75; when the shifting block 7 moves along the axial direction of the push-pull rod 3, the limiting column 64 moves in the oblique sliding groove 75 to make the sliding block 63 move relative to the movable block 6 in a direction perpendicular to the movement direction of the shifting block 7.

[0077] In addition, it should be noted that a receiving cavity 65 is formed in the movable block 6 and on both sides of the limiting column 64, and a spring body 66 is embedded in each receiving cavity 65; and each elastic body is axially limited between the cavity wall of the receiving cavity 65 and the sliding block 63; when the sliding block 63 moves relative to the movable block 6 in a direction perpendicular to the movement direction of the shift block 7, one of the pair of elastic bodies located on both sides of the limiting column 64 is compressed.

[0078] In summary, the specific implementation principle of the composite puncture and grasping forceps of this embodiment is as follows:

[0079] When the puncture grasping forceps is used for puncture: the push-pull rod 3 is in an extended state relative to the rotating seat 4, that is, at this time, the strip-shaped limiting groove 31 on the push-pull rod 3 partially extends outward from the end of the rotating seat 4 facing the puncture head 11, and the puncture head 11 located at the far-hand end of the puncture tube 1 covers the grasping forceps head 21 at the far-hand end of the grasping forceps tube 2, that is, the entire grasping forceps head 21 is completely retracted in the puncture tube 1 to facilitate puncture. More specifically, the elastic connector 5 is in a stretched deformation state, the shifting block 7 on the rotating seat 4 is moved to the end of the rotating seat 4 facing the puncture head 11, and the limiting column 64 is located at the end of the inclined slot 75 on the shifting block 7 away from the puncture head 11. The positioning block 61 is separated from the positioning notch 32, and the overall movable block 6 is located at the end of the push-pull rod 3 away from the puncture head 11, and the positioning block 61 abuts against the end of the push-pull rod 3 away from the puncture head 11 and the two ends that are L-shaped and recessed. In addition, the elastic card block 73 provided on one side of the trigger portion 72 of the shift block 7 abuts against the side wall of the card interface 45 of the rotating seat 4 from the side of the assembly groove 43. Under such a structure, when no pressure is applied to the shift block 7 to make the elastic card block 73 retract into the accommodating groove of the trigger portion 72 to make the shift block 7 move to the side away from the puncture head 11, the overall shift block 7, the positioning block 61, the push-pull rod 3 and the elastic connecting piece 5 in the stretched state all maintain the stability of the relative state, thereby maintaining the stability of the state of the puncture tube 1 covering the grasping forceps head 21, thereby ensuring the normal use of the puncture function.

[0080] During the switching process from the puncture state to the tissue grasping state:

[0081] The manual toggle switch 7 causes the elastic block 73 of the switch 7 to retract into the accommodating groove of the trigger portion 72, so that the entire switch 7 can move on the rotating seat 4 toward the side away from the puncture head 11. In this process, the limit post 64 on the movable block 6 will produce relative movement with the switch 7 along the inclined slide groove 75. At this time, the spring body 66 in the accommodating cavity 65 on the side of the moving direction of the sliding block 63 in the movable block 6 is gradually compressed until the spring body 66 can no longer be compressed. That is, the entire movable block 6 can only move perpendicular to the axial direction of the push-pull rod 3 relative to the push-pull rod 3 until the positioning block 61 releases the abutment on the end of the push-pull rod 3 away from the puncture head 11 as the movable block 6 moves. In this way, the push-pull rod 3 loses the limiting effect of the positioning block 61, and under the action of the elastic restoring force of the elastic connecting member 5, it will move with the puncture tube 1 to the side near the hand end, so that the grasping forceps head 21 can gradually extend to the outside of the puncture head 11. During the axial movement of the push-pull rod 3, as long as the positioning block 61 has not yet contacted the positioning notch 32, the spring body 66 in the accommodating chamber 65 on the side of the moving direction of the sliding block 63 in the movable block 6 is in a compressed and deformed state, until the positioning block 61 is aligned with the positioning notch 32, at this time, due to the elastic reset force of the spring body 66, the movable block 6 will drive the positioning block 61 to move relative to the rotating seat 4 so that the positioning block 61 enters the positioning notch 32, so that when the positioning block 61 and the positioning notch 32 are plugged into place, the elastic block 73 on the dial button also moves to the side of the card interface 45 away from the puncture head 11, and then the elastic block 73 restores the elastic natural state under the elastic reset action. Under such a structure, the state of the puncture grasping forceps for grasping tissue is switched, and the limit column 64 is located at the end of the inclined slide groove 75 of the dial block 7 relatively close to the puncture head 11. And in this state, when no pressure is applied to the shift block 7 to make the elastic block 73 retract into the receiving groove of the trigger portion 72 to make the shift block 7 move toward the side of the puncture head 11, the overall shift block 7, the positioning block 61, the push-pull rod 3 and the elastic connecting member 5 in a natural elastic state all maintain the stability of the relative state, thereby maintaining the stability of the state of the grasping forceps head 21 extending outside the puncture head 11, thereby ensuring the normal use of the grasping function.

[0082] During the switching process from grasping tissue with grasping forceps to puncturing state:

[0083] The manual movement of the shift block 7 causes the elastic block 73 of the shift block 7 to retract into the accommodating groove of the trigger portion 72, so that the entire shift block 7 can move toward one side of the puncture head 11 on the rotating seat 4. In this process, the limit post 64 on the movable block 6 will produce relative movement with the shift block 7 along the inclined slide groove 75. At this time, the spring body 66 in the accommodating cavity 65 on the side of the moving direction of the sliding block 63 in the movable block 6 is gradually compressed until the spring body 66 can no longer be compressed. That is, the entire movable block 6 can only move perpendicular to the axial direction of the push-pull rod 3 relative to the push-pull rod 3 until the positioning block 61 is separated from the positioning notch 32 on the push-pull rod 3 as the movable block 6 moves. In this way, the push-pull rod 3 loses the limiting effect of the positioning block 61. Manually pulling the push-pull rod 3 can make the push-pull rod 3 drive the puncture tube 1 to move toward the side of the puncture head 11, and the puncture tube 1 moves toward the far hand end, so that the grasping forceps head 21 can gradually retract into the puncture tube 1. During the above-mentioned axial displacement of the push-pull rod 3, as long as the positioning block 61 has not yet contacted the end of the push-pull rod 3 away from the puncture head 11, the spring body 66 in the accommodating chamber 65 on the side of the moving direction of the sliding block 63 in the movable block 6 is in a compressed deformation state, until the positioning block 61 pushes the push-pull rod 3 away from the puncture head 11 and the end of the two ends of the end that is L-shaped and recessed, at this time, under the reset action of the spring body 66 in the accommodating chamber 65, the movable block 6 will move with the positioning block 61, so that the positioning block 61 pushes the push-pull rod 3 away from the puncture head 11 and the end of the two ends of the end that is L-shaped and recessed, and during the movement of the push-pull rod 3 toward the puncture head 11, the elastic connector 5 is gradually stretched and deformed. In this case, the elastic block 73 on the dial button also moves to the side wall of the card interface 45 on the side facing the puncture head 11, and then the elastic block 73 restores the elastic natural state under the elastic reset action. In this way, the puncture grasping forceps is switched to the state for puncture, and the limiting column 64 is located at the end of the inclined slot 75 of the shifting block 7 relatively away from the puncture head 11. And in this state, when no pressure is applied to the shifting block 7 to make the elastic block 73 retract into the receiving slot of the trigger part 72 to make the shifting block 7 move away from the puncture head 11, the overall shifting block 7, the positioning block 61, the push-pull rod 3 and the elastic connecting member 5 in the stretched deformation state all maintain the stability of the relative state, thereby maintaining the stability of the state in which the grasping forceps head 21 is completely accommodated in the puncture tube 1, thereby ensuring the normal use of the puncture function.

[0084] Furthermore, whether the composite puncture and grasping forceps of this embodiment is in the process of puncturing or grasping tissue, the puncture tube 1 and the grasping forceps tube 2 can be driven to rotate by rotating the rotating seat 4 by fingers, so as to adjust the operating angle thereof.

[0085] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0086] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0087] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0089] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0090] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A composite puncture and grasping forceps, characterized in that: include: A grasping forceps tube, a puncture tube sleeved on the outside of the grasping forceps tube, a push-pull rod fixedly connected to the puncture tube and used to drive the puncture tube to move synchronously, a rotating seat movably connected to the push-pull rod and suitable for driving the push-pull rod to rotate, and a handle portion rotatably matched with the rotating seat; The end of the grasping forceps tube away from the handle portion is provided with a grasping forceps head suitable for opening and closing movements, and the end of the puncture tube away from the handle portion is formed with a puncture head; The grasping forceps tube passes through the push-pull rod and the rotating seat and is connected to the pull rod extending from the handle portion into the rotating seat, and the handle portion is provided with a movable handle connected to the pull rod for driving the grasping forceps head to open and close; A pull rod seat is provided between the gripping clamp tube and the pull rod; the gripping clamp tube is fixedly connected to the pull rod seat; The pull rod is rotatably matched with the pull rod seat; an annular groove is formed at the end of the pull rod connected to the pull rod seat, and a pair of clamping joints suitable for clamping into the annular groove are formed at the end of the pull rod seat facing the pull rod; The rod seat is arranged in the rotating seat, and is suitable for moving along the axial direction of the rod in the rotating seat; and the rod seat is suitable for rotating relative to the rod when the rotating seat makes synchronous rotational movement; a clamping groove for clamping the rotating seat is formed in the handle portion; The rotating seat is integrally formed with a connector for inserting into the handle; the outer wall of the connector is formed with an annular clamping groove, the groove wall of the clamping groove is formed with an annular protruding clamping head; the clamping head is clamped and matched with the clamping groove; The push-pull rod is provided with a strip-shaped limiting groove along its axial displacement direction, and a positioning notch communicating with the strip-shaped limiting groove is provided on one of the groove walls of the strip-shaped limiting groove; An elastic connector is also provided between the rotating seat and the push-pull rod; a movable block is movably connected in the rotating seat, and a positioning block suitable for extending into the strip-shaped limiting groove is provided on the movable block, and the positioning block is suitable for being embedded in the positioning notch to form a stop for the axial movement of the push-pull rod; A shifting block is movably mounted on the rotating seat; the shifting block is connected to the movable block, that is, the shifting block is suitable for driving the movable block to move so as to switch the matching and disengagement between the positioning block and the positioning notch.

2. The composite puncture and grasping forceps according to claim 1, characterized in that: The connector is also fixedly connected to an annular ratchet wheel; and A ratchet limiting wheel suitable for matching with an annular ratchet wheel is fixedly connected to the handle portion; The pull rod passes through the ratchet limiting wheel and the annular ratchet wheel in sequence and is connected to the pull rod seat.

3. The composite puncture and grasping forceps according to claim 1, characterized in that: The movable handle is provided with an eccentric wheel connected to the pull rod; and A connecting pin is arranged between the movable handle and the handle portion, and an elastic connecting body is arranged between the movable handle and the handle portion.

4. The composite puncture and grasping forceps according to claim 1, characterized in that: The rotating seat comprises an upper seat body and a lower seat body suitable for matching and assembling; The upper seat body is movably connected to the movable block and the shifting block at the same time; and The lower seat body is connected with the elastic connecting piece.

5. The composite puncture and grasping forceps according to claim 1, characterized in that: The end surface of the movable block facing away from the strip-shaped limiting groove is also movably matched with a sliding block; the end surface of the sliding block facing the shifting block is provided with a convex limiting column for inserting into the shifting block; and The shift block is formed with an inclined slot which is distributed in an inclined shape relative to the axial movement direction of the push-pull rod; The limiting column part extends into the inclined slide groove to form a sliding fit between the limiting column and the inclined slide groove; When the shift block moves along the axial direction of the push-pull rod, the limit column moves in the inclined slide groove to make the sliding block move relative to the movable block along a moving direction perpendicular to the shift block.

6. The composite puncture and grasping forceps according to claim 4, characterized in that: A receiving cavity is formed in the movable block and on both sides of the limiting column, and a spring body is embedded in each receiving cavity; and Each elastic body is axially limited between the cavity wall of the accommodating cavity and the sliding block; When the sliding block moves relative to the movable block along a moving direction perpendicular to the shifting block, one of the pair of elastic bodies located on both sides of the limiting column is compressed.

7. The composite puncture and grasping forceps according to claim 1, characterized in that: The shift block includes a shift seat connected to the movable block and a trigger portion integrally connected to the shift seat; and The rotating seat is formed with an assembly groove for matching with the toggle seat; and the rotating seat is also provided with a card interface for matching with the contact part; One side of the trigger portion is provided with an elastic card block suitable for abutting against the side wall of the card interface from one side of the assembly groove.

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