Integrated puncture grasping forceps

Abstract

The present invention discloses an integrated 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 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 perform rotational movement, 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; and the grasping forceps tube passes through the push-pull rod and the rotating seat and is connected to a pull rod extended 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 perform opening and closing movements; and the movable handle is connected with a firing linkage structure.

Description

Technical Field

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

[0002] Puncture needles and grasping forceps are two common medical instruments used during minimally invasive surgery. Puncture needles can be used to puncture organs and tissues or inject medications, while grasping forceps are often used in conjunction with a laparoscope for various laparoscopic procedures. Of course, puncture needles are sometimes also used during laparoscopic surgery, either for puncturing holes before opening the abdomen or for accessing organs or tissues within the abdominal cavity during surgery.

[0003] For the two instruments mentioned above, if they are used separately, that is, the instruments need to be replaced during the operation, on the one hand, the replacement of medical instruments has the problem of low operational 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, and the comprehensive cost of the various instruments used will be settled in the patient's surgical cost. Reducing the type and number of surgical instruments to reduce the surgical cost can also simultaneously reduce the patient's cost pressure and ease the doctor-patient relationship.

[0004] In response to the above situation, the prior art has developed an integrated composite grasping forceps that can simultaneously perform puncture and grasping functions. For example, the active forceps disclosed in Publication No. CN205831834U combine the puncture and biopsy functions by providing a left tip and a right tip at the distal end of a pair of biopsy forceps heads. This allows the biopsy forceps to puncture tissue organs through the distal tip portion and then perform tissue sampling and biopsy. This structure allows the entire active forceps to simultaneously perform the puncture function, achieving the dual-purpose effect of a single instrument. However, it has been found that in this case, the left and right tip portions present a triangular pyramid, a quadrangular pyramid, or a multi-sided pyramid structure when the forceps heads are closed. Although this can effectively perform the puncture function, the tapered portions present in the circumferential direction are likely to cause unexpected damage to the tissue during tissue clamping, i.e., the safety of the tissue clamping process is low.

[0005] In addition, during the use of the grasping forceps, the handle is required to realize the switching control of the opening and closing of the forceps head. Specifically, the medical staff's hand exerts a continuous force on the handle to maintain the open and closed state of the grasping forceps. That is to say, after the grasping forceps grasps the tissue, the hand cannot be loosened to maintain effective clamping of the tissue. If the hand is accidentally loosened, the forceps head may open and cause the tissue to fall off from the forceps head. In this process, the medical staff must be careful when operating and keep pinching the handle. In particular, if the hand becomes loose during the process of removing the grasping forceps from the body after grasping the tissue, the sampling will fail, and the grasping operation will need to be performed again. This will not only delay the progress of the operation, but also may cause secondary damage during the sampling process.

[0006] Therefore, for the grasping forceps commonly used in the prior art, the performance of the handle assembly for controlling the opening and closing of the forceps head needs to be further improved, so that even if the medical staff does not apply continuous pinching force to the handle part after grasping the tissue, the forceps head can remain in a relatively closed state to maintain an effective clamping state for the tissue. Summary of the Invention

[0007] The purpose of the present invention is to provide an integrated puncture and grasping forceps to optimize the overall performance of the puncture and grasping forceps in the process of grasping tissue.

[0008] The integrated puncture grasping forceps of the present invention is achieved as follows:

[0009] An integrated puncture grasping forceps comprises: 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;

[0010] 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

[0011] 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; and the movable handle is connected to a firing linkage structure;

[0012] The firing linkage structure includes a connecting rod connected to the movable handle, a sliding seat connected to the connecting rod, a toothed portion formed on the sliding seat and distributed in a strip shape, and a pawl suitable for engaging with the toothed portion;

[0013] A coil spring is provided between the pawl and the handle portion; and a button for moving the pawl is slidably connected to the handle portion.

[0014] In an optional embodiment of the present invention, the sliding seat is provided with strip-shaped hollow grooves distributed along its sliding direction;

[0015] A spring suitable for stretching and deformation is provided between the inner cavity wall of the handle portion and the groove wall of the strip-shaped hollow groove.

[0016] In an optional embodiment of the present invention, a pull rod seat is provided between the grasping forceps tube and the pull rod;

[0017] The grasping clamp tube is fixedly connected to the pull rod seat; and

[0018] The pull rod is rotatably engaged with the pull rod seat;

[0019] An annular groove is formed on 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 on the end of the pull rod seat facing the pull rod;

[0020] The pull rod seat is arranged in the rotating seat, and is suitable for moving along the axial direction of the pull rod in the rotating seat; and the pull rod seat is suitable for rotating relative to the pull rod when performing synchronous rotation movement with the rotating seat.

[0021] In an optional embodiment of the present invention, a snap-in groove for snapping in the rotating seat is formed in the handle portion; and

[0022] 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;

[0023] The clamping head is engaged with the clamping slot.

[0024] In an optional embodiment of the present invention, the connector is further fixedly connected to an annular ratchet wheel; and

[0025] A ratchet limiting wheel adapted to be coupled with the annular ratchet wheel is fixedly connected to the handle portion;

[0026] The pull rod passes through the ratchet limiting wheel and the annular ratchet wheel in sequence and is connected to the pull rod seat.

[0027] In an optional embodiment of the present invention, the movable handle is provided with an eccentric wheel connected to the pull rod; and

[0028] A connecting pin is provided between the movable handle and the handle portion, and an elastic connecting body is provided between the movable handle and the handle portion.

[0029] In an optional embodiment of the present invention, a strip-shaped limiting groove is provided on the push-pull rod along its axial movement 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;

[0030] An elastic connector is further provided between the rotating seat and the push-pull rod; a movable block is movably connected to the rotating seat, and a positioning block is provided on the movable block, which is suitable for extending into the strip-shaped limiting groove, 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

[0031] A shift block is movably mounted on the rotating seat; the shift block is connected to the movable block, that is, the shift block is suitable for driving the movable block to move so as to switch the cooperation and disengagement between the positioning block and the positioning notch.

[0032] 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

[0033] The upper seat is movably connected to the movable block and the shift block at the same time; and

[0034] The lower seat body is connected with the elastic connecting piece.

[0035] 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 to a sliding block; the end surface of the sliding block facing the shifting block is provided with a raised limiting column for inserting into the shifting block; and

[0036] The shift block is formed with an inclined slot which is distributed in an oblique shape relative to the axial movement direction of the push-pull rod;

[0037] The limiting column partially extends into the inclined slide groove to form a sliding fit between the limiting column and the inclined slide groove;

[0038] When the shift block moves along the axial direction of the push-pull rod, the limiting column moves in the inclined sliding groove to enable the sliding block to move relative to the movable block along a moving direction perpendicular to the shift block.

[0039] In an optional embodiment of the present invention, an accommodating cavity is formed in the movable block and on both sides of the limiting column, and a spring body is embedded in each accommodating cavity; and

[0040] Each elastic body is axially limited between the cavity wall of the accommodating cavity and the sliding block;

[0041] 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.

[0042] By adopting the above technical solution, the present invention has the following beneficial effects: the integrated 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, switches between the puncture function and the grasping function by the relative movement between the puncture tube and the grasping forceps tube, thereby realizing the dual-purpose function of the overall puncture grasping forceps. In addition, through the cooperation of the push-pull rod, the rotating seat and the shift block, the push-pull rod can make axial movement under the action of the shift block and the movable block, thereby driving the synchronous movement of the puncture tube. With such a structure, the puncture tube and the grasping forceps tube can be switched to different usage states. In this way, the integrated puncture grasping forceps can realize the two independent functions of puncturing and grasping tissue during use without interfering with each other. With such a structure, the puncture tube can be prevented from causing unexpected damage to the tissue during the tissue grasping process.

[0043] In addition, through the firing linkage structure connected to the movable handle; the firing linkage structure is achieved through the coordinated use of the sliding seat and the pawl, and the coordinated use of the pawl and the toothed portion on the sliding seat, so that when the movable handle generates a pulling action on the sliding seat, the pawl can engage with the toothed portion on the sliding seat, thereby allowing the entire sliding seat to maintain the stability of the position of the sliding seat in the inner cavity of the handle part under the above-mentioned engaging action, so that even if the hand no longer applies continuous force to the movable handle, the sliding seat will not shift in the inner cavity of the handle part, thereby the clamp tube connected to the sliding seat can maintain its state stability, and then the clamp head connected to the clamp tube can maintain a continuous clamping state for the tissue, avoiding the problem of unexpected opening of the clamp head due to error in hand operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the integrated puncture grasping forceps of the present invention;

[0045] Figure 2 This is a partial structural diagram of the integrated puncture grasping forceps of the present invention. Figure 1 ;

[0046] Figure 3 This is a partial structural diagram of the integrated puncture grasping forceps of the present invention. Figure 2 ;

[0047] Figure 4 This is a partial structural diagram of the integrated puncture grasping forceps of the present invention. Figure 3 ;

[0048] Figure 5 This is a partial structural diagram of the integrated puncture grasping forceps of the present invention. Figure 4 ;

[0049] Figure 6 It is a partial cross-sectional structural schematic diagram of the integrated puncture grasping forceps of the present invention;

[0050] Figure 7 This is a schematic diagram of the matching structure of the push-pull rod and the rotating seat of the integrated puncture grasping forceps of the present invention;

[0051] Figure 8 This is a schematic structural diagram of the movable block of the integrated puncture grasping forceps of the present invention;

[0052] Figure 9 This is a schematic diagram of the coordination structure of the movable block and the push-pull rod of the integrated puncture grasping forceps of the present invention from a first viewing angle;

[0053] Figure 10 2. It is a schematic diagram of the coordination structure of the movable block and the push-pull rod of the integrated puncture grasping forceps of the present invention from a second viewing angle;

[0054] Figure 11 This is a schematic diagram of the matching structure of the limiting column and the oblique sliding groove of the shift block of the integrated puncture grasping forceps of the present invention;

[0055] Figure 12 This is a schematic diagram of the matching structure of the rotating seat and the shifting block of the integrated puncture grasping forceps of the present invention;

[0056] Figure 13 It is a schematic diagram of the matching structure of the rotating seat, the push-pull rod and the elastic connecting piece of the integrated puncture grasping forceps of the present invention;

[0057] Figure 14 This is a schematic structural diagram of the integrated puncture grasping forceps of the present invention in cooperation with the puncture function;

[0058] Figure 15 It is a schematic structural diagram of the integrated puncture grasping forceps of the present invention in the coordinated grasping forceps function;

[0059] Figure 16 It is a schematic diagram of the process from the corresponding grasping function state to the puncturing function state of the integrated puncture grasping forceps of the present invention.

[0060] 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 member 5, movable block 6, positioning block 61, limiting protrusion 62, sliding block 63, limiting column 64, accommodating cavity 65, spring body 66, shift block 7, shift seat 71, trigger part 72, elastic block 73, inclined slide groove 75, pull rod 9, annular groove 91 , pull rod seat 200, snap joint 201, snap groove 81, snap head 82, snap groove 49, annular ratchet wheel 301, ratchet limiting wheel 302, connecting head 48, handle part 901, movable handle 902, connecting rod 903, sliding seat 904, toothed part 906, pawl 907, coil spring 908, strip-shaped hollow groove 909, hinged part 910, connecting part 911, dial plate 912, mounting seat 913, base 914, cone tip 915, dial button 916, spring 918, clamping block 921, snap ear 923. DETAILED DESCRIPTION

[0061] 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.

[0062] See also Figures 1 to 16 As shown, this embodiment provides an integrated puncture grasping forceps, comprising a grasping forceps tube 2, a puncture tube 1 sleeved outside 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 for synchronous movement, a rotating base 4 movably connected to the push-pull rod 3 and adapted to drive the push-pull rod 3 for rotational movement, and a handle portion 8 rotatably engaged with the rotating base 4. The puncture tube 1 and the grasping forceps tube 2 are capable of relative movement. A grasping head 11 adapted for opening and closing movement is provided at the end of the grasping forceps tube 2 remote from the handle portion 8, and the puncture head 11 is also formed at the end of the puncture tube 1 remote from the handle portion 8.

[0063] 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, and 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.

[0064] 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.

[0065] 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 engaged. Here, an optional embodiment is illustrated with reference to the accompanying drawings, in which the rotatable engagement between the rod 9 and the rod seat 200 is achieved through the following structure:

[0066] 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 snap joints 201 suitable for snapping 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 snapped 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 tie rod seat 200 rotates synchronously with the rotating seat 4, the tie rod seat 200 rotates relative to the tie rod 9. That is to say, based on this structure, when the tie rod seat 200 rotates with the rotating seat 4, the tie rod 9 does not rotate synchronously, but can be fixed in the handle portion 8. In general, the tie rod 9 and the tie rod seat 200 can generate synchronous axial movement, but they do not rotate synchronously with each other.

[0067] 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:

[0068] 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 inserting 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 rotates, the handle portion 8 can remain relatively stationary and will not produce a follow-up rotation behavior.

[0069] In order to control the progress of the rotating base 4 when the medical staff manually turns the rotating base 4, prevent the rotating base 4 from rotating too fast and out of control, and thus improve the accuracy of the rotation adjustment of the rotating base 4, this embodiment is designed to have an annular ratchet wheel 301 fixedly connected to the connecting head 48; and a ratchet limit wheel 302 suitable for matching with the annular ratchet wheel 301 fixedly connected to the handle portion 8, where the mating surface between the annular ratchet wheel 301 and the ratchet limit wheel 302 is a plurality of teeth grooves arranged continuously in the circumferential direction. When the rotating base 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 "clicking" sound can be generated during the rotation process, thereby notifying the medical staff of the rotation range; the pull rod 9 passes through the ratchet limit wheel 302 and the annular ratchet wheel 301 in sequence and is connected to the pull rod base 200. In this embodiment, the rotation of the grasping 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 rotating 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.

[0070] 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: a movable handle 902 for driving the grasping forceps head to open and close movement is provided in the handle portion 901, and a firing linkage structure connected to the movable handle 902.

[0071] Specifically, the firing linkage structure includes a connecting rod 903 connected to the movable handle 902, a sliding seat 904 connected to the connecting rod 903, a toothed portion 906 formed in a strip-like distribution on the sliding seat 904, and a pawl 907 suitable for engaging with the toothed portion 906. The sliding seat 904 is used to connect to the clamp of the grasping forceps, so that the linear movement of the sliding seat 904 within the inner cavity of the handle portion 901 drives the clamp to move linearly to achieve the opening and relative movement of the clamp head connected to the clamp. The specific structure and implementation principle of the clamp and clamp head can adopt mature technologies in the existing technology, and this embodiment does not impose an absolute limitation on this.

[0072] Based on the above structure, a coil spring 908 is provided between the pawl 907 and the handle 901. A toggle button 916 is also slidably attached to the handle 901 for actuating the pawl 907. When the toggle button 916 actuates the pawl 907, the coil spring 908 deforms, thereby releasing the pawl 907 from the toothed portion under the action of the toggle button 916. After the force exerted by the toggle button 916 on the pawl 907 is released, the pawl 907 is reset by the resetting action of the coil spring 908 and returns to its original engagement with the toothed portion. In other words, when the coil spring 908 is in its normal state, the pawl 907 remains engaged with a tooth in the toothed portion. Only when the coil spring 908 is deformed can the pawl 907 be released from the toothed portion.

[0073] It should also be noted that the sliding seat 904 in this embodiment is provided with strip-shaped hollow grooves 909 distributed along its sliding direction. A spring 918 suitable for tensile deformation is provided between the inner wall of the handle portion 901 and the groove wall of the strip-shaped hollow groove 909. The design of the spring 918 here is to allow the sliding seat 904 to reset under the elastic reset force of the spring 918 after the engagement between the toothed portion on the sliding seat 904 and the pawl 907 is released. During this reset process, the connecting rod 903 connected to the spring 918 seat can be reset, and the movable handle connected to the connecting rod 903 is also reset synchronously. Therefore, in this embodiment, there is no need to additionally provide the spring 918 between the movable handle and the inner cavity of the handle portion 901.

[0074] It should also be noted that the pull rod 9 of this embodiment is connected to the strip-shaped hollow groove 909 of the sliding seat 904 through the following structure:

[0075] A clamping block 921 is attached to the end of the pull rod 9 inserted into the strip-shaped hollow groove 909, and a clamping ear 923 is provided in the strip-shaped hollow groove 909 for connecting to the axial end of the clamping block 921. This structure prevents the clamping block 921 from being disengaged from the strip-shaped hollow groove 909, thereby allowing the sliding seat 904 to drive the pull rod 9 to move synchronously. The clamping block 921 can be threadedly connected to the pull rod 9, so that after the pull rod 9 is inserted into the strip-shaped hollow groove 909, a clamping block 912 is sleeved on its end to achieve a non-detachable fit between the pull rod 9 and the sliding seat 904.

[0076] More specifically, the sliding seat 904 is further provided with a connecting post for rotationally engaging with the connecting rod 903. The movable handle is formed with a hinge portion 910 for rotationally engaging with the inner wall of the handle portion 901 and a connecting portion 911 for rotationally engaging with the connecting rod 903. The inner wall of the handle portion 901 is formed with a support surface for sliding engagement with the connecting portion 911.

[0077] Furthermore, it should be noted that a mounting seat 913 for rotationally engaging with the pawl 907 is provided on the inner wall of the handle portion 901. A dial button 916 is integrally connected to a dial plate 912 adapted to abut against the pawl 907. The pawl 907 comprises a base 914 adapted to rotationally engage with the inner wall of the handle portion 901, and a tapered tip 915 integrally formed on the base 914 adapted to engage with the toothed portion. The sidewall of the tapered tip 915 facing away from the connecting rod 903 is a smooth, flat end surface. The dial button 916 is mounted on the outer shell of the handle portion 901, making it easy to manually actuate the dial button 916. The dial plate 912 penetrates the outer shell of the handle portion 901 and is inserted into the inner cavity of the handle portion 901 to abut against the pawl 907.

[0078] In summary, for the firing handle assembly of this embodiment:

[0079] The pawl 907 is used in conjunction with the toothed portion 906 on the sliding seat 904 so that when the movable handle pulls the sliding seat 904, the pawl 907 can engage with the toothed portion 906 on the sliding seat 904, thereby making the entire sliding seat 904 maintain the stability of the position of the sliding seat 904 in the inner cavity of the handle portion 901 under the above-mentioned engagement action, so that even if the hand no longer applies continuous force to the movable handle, the sliding seat 904 will not shift in the inner cavity of the handle portion 901, thereby the clamp tube connected to the sliding seat 904 can maintain its state stability, thereby making the clamp head connected to the clamp tube maintain a continuous clamping state for the tissue, avoiding the problem of unexpected opening of the clamp head due to error in hand operation.

[0080] More specifically, when the hand pinches the movable handle, the sliding seat 904 will move toward the side away from the pliers head. At this time, the spring 918 connected to the sliding seat 904 will be stretched and deformed, and during the movement of the sliding seat 904, the toothed portion will continuously rub against the pawl 907, and the pawl 907 will then engage with different teeth of the adjacent toothed portions in sequence. During this process, if the medical staff feels that the hand has pinched too much, that is, the sliding seat 904 has moved too much and needs to be retracted a certain distance, then they only need to toggle the dial button 916 to release the pawl 907 from the toothed portion, and the sliding seat 904 will be reset toward the side of the pliers head. This back and forth adjustment process continues until the sliding seat 904 moves to the appropriate position in the inner cavity of the handle portion 901 to maintain the effective clamping of the pliers head on the tissue. When the tissue is clamped and released, the user manually activates the dial button 916, causing the pawl 907 to engage with the toothed portion. As the sliding seat 904 returns to its original position under the action of the spring 918, the sliding seat 904 drives the clamp tube toward the clamp head, thereby opening the clamp head connected to the clamp tube. This achieves switchable control of the opening and closing of the clamp head.

[0081] Based on the above structure, the puncture and grasping functions of the integrated puncture and grasping forceps of this embodiment are switched and adjusted through the following structure:

[0082] Generally speaking, the above adjustment process is achieved through the push-pull tube, the rotating seat 4 and the shift block 7 used in conjunction with each other.

[0083] Next, a detailed description will be given in conjunction with the accompanying drawings. Generally speaking, the push-pull rod 3 is fixedly connected to the puncture tube 1 of the integrated puncture and grasping forceps, and is used to drive the puncture tube 1 to move synchronously through the axial movement of the push-pull rod 3. The push-pull rod 3 is provided with a strip-shaped limiting groove 31 along its axial movement direction, and a positioning notch 32 is provided on one of the groove walls of the strip-shaped limiting groove 31 to communicate with the strip-shaped limiting groove 31. In order to ensure that the push-pull rod 3 can cooperate with the puncture tube 1 and the grasping forceps tube 2 in normal use, a through hole is also provided in the push-pull rod 3 along its axial movement direction for the grasping forceps tube 2 to pass through. The puncture tube 1 is fixedly connected to the through hole, 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 flexible manner with the through hole, so that the axial movement of the push-pull rod 3 does not drive the synchronous movement of the grasping forceps tube 2, that is, the state of the grasping forceps tube 2 is maintained without being affected by the push-pull rod 3.

[0084] The rotating base 4 is movably coupled to the push-pull rod 3 and is adapted to drive the push-pull rod 3 in synchronous rotation. More specifically, the rotating base 4 comprises an upper base 41 and a lower base 42 adapted for assembly. The facing end surfaces of the upper and lower bases 41, 42 are each formed with an assembly cavity for receiving the push-pull rod 3. Specifically, the assembly cavity is adapted to mate with the strip-shaped retaining groove 31 formed on the push-pull rod 3.

[0085] Furthermore, an elastic connector 5 is disposed between the rotating seat 4 and the push-pull rod 3; the lower seat body 42 is connected to the elastic connector 5. Furthermore, the end surface of the push-pull rod 3, facing away from the strip-shaped retaining groove 31, is formed with a recessed mating groove 33 for receiving the elastic connector 5. The elastic connector 5 can optionally be a spring. Furthermore, the elastic connector 5 generates an elastic tension during the axial movement of the push-pull rod 3.

[0086] Furthermore, a movable block 6 is movably connected to the rotating seat 4. The movable block 6 is provided with a positioning block 61 adapted to extend into the strip-shaped limiting groove 31. The positioning block 61 is adapted to be 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 perform synchronous axial movement. Only when the positioning block 61 is disengaged from the positioning notch 32 can the push-pull rod 3 drive the puncture tube 1 to perform synchronous axial movement. In other words, the engagement and disengagement of the positioning block 61 with the positioning notch 32 serve as the switching adjustment point for the axial movement state of the push-pull rod 3. Here, the positioning block 61 is also adapted to abut 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-shaped recessed relative to the other end head, and the positioning block 61 is suitable for abutting against the end head with the L-shaped recessed end head among the two end heads.

[0087] 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 engagement and disengagement of the positioning block 61 with 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. When the cam 72 is in the unlock state, the cam 72 is in the unlock state, and the cam 72 is locked.

[0088] Next, in more detail, the upper housing 41 is provided with a mounting cavity 46 for accommodating the movable block 6. A retaining groove 47 is formed on the wall of the mounting cavity 46, perpendicular to the axial displacement direction of the push-pull rod 3. Furthermore, the movable block 6 is provided with a retaining protrusion 62 that engages with the retaining groove 47. This structure restricts the movable block 6's movement within the upper housing 41 to a limited path, allowing it to move only in a direction perpendicular to the axial displacement direction of the push-pull rod 3.

[0089] The coordination between the movable block 6 and the shift block 7 is achieved through the following structure:

[0090] A sliding block 63 is movably connected to the end face of the movable block 6 facing away from the strip-shaped limiting groove 31. The end face of the sliding block 63 facing the selector block 7 is provided with a raised limiting post 64 for insertion into the selector block 7. The limiting post 64 and the sliding block 63 are fixedly connected. Furthermore, an inclined slot 75 is formed in the selector block 7, which is tilted relative to the axial movement direction of the push-pull rod 3. It should be noted that the end of the inclined slot 75 facing the puncture head 11 is tilted toward the positioning notch 32 on the push-pull rod 3 relative to the axial movement direction of the push-pull rod 3. The limiting post 64 partially extends into the inclined slot 75, forming a sliding engagement between the limiting post 64 and the inclined slot 75. When the selector block 7 moves axially along the push-pull rod 3, the limiting post 64 moves within the inclined slot 75, causing the sliding block 63 to move relative to the movable block 6 in a direction perpendicular to the movement of the selector block 7.

[0091] 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.

[0092] In summary, the specific implementation principles of the integrated puncture grasping forceps of this embodiment are as follows:

[0093] When the integrated puncture grasping forceps is used for puncture, the push-pull rod 3 is in an extended state relative to the rotating base 4. That is, the strip-shaped limiting groove 31 on the push-pull rod 3 partially extends outside the end of the rotating base 4 facing the puncture head 11, and the puncture head 11 at the distal end of the puncture tube 1 covers the grasping head 21 at the distal end of the grasping tube 2. In other words, the grasping head 21 as a whole is completely retracted into the puncture tube 1 to facilitate puncture. More specifically, the elastic connector 5 is in a tensile deformation state, the shift block 7 is moved on the rotating base 4 to the end of the rotating base 4 facing the puncture head 11, and the limiting column 64 is located at the end of the inclined groove 75 on the shift block 7 facing away from the puncture head 11. The positioning block 61 is disengaged 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 the end of the push-pull rod 3 away from the puncture head 11 and the two ends thereof that are L-shaped recessed. Furthermore, an elastic card block 73 provided on one side of the trigger portion 72 of the shift block 7 abuts 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 connector 5 in the stretched state all maintain relative stability, 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.

[0094] During the switching process from the puncture state to the tissue grasping state:

[0095] When the lever 6 is manually moved, the elastic block 73 of the lever 6 is retracted into the receiving groove of the trigger portion 72, so that the entire lever 7 can be moved on the rotating seat 4 toward the side away from the puncture head 11. During this process, the limit post 64 on the movable block 6 will produce relative movement with the lever 7 along the inclined slide groove 75. At this time, the spring body 66 in the receiving cavity 65 on the side of the movable block 6 toward the moving direction of the sliding block 63 is gradually compressed until the spring body 66 can no longer be compressed. That is, the entire movable block 6 can only move perpendicularly 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 against 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 elastic restoring force of the elastic connecting member 5, it will carry 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 movable block 6 facing the movement direction of the sliding block 63 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 return 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. In this way, when the positioning block 61 is plugged into the positioning notch 32, the elastic block 73 on the dial button also moves to the side of the card interface 45 away from the puncture head 11. Then, under the elastic return action, the elastic block 73 returns to its elastic natural state. Under this structure, the integrated puncture grasping forceps is switched to the state for grasping tissue, and the limit column 64 is located at the end of the inclined slot 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 entire shift block 7, the positioning block 61, the push-pull rod 3 and the elastic connecting member 5 in the natural elastic state all maintain relative stability, 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.

[0096] During the switching process from grasping tissue with the forceps to puncturing state:

[0097] When the lever 6 is manually moved, the spring 66 in the accommodating cavity 65 on the side of the sliding block 63 moving in the direction of movement of the sliding block 63 is gradually compressed until the spring 66 can no longer be compressed, that is, the entire movable block 6 can only move perpendicularly to the axial direction of the push-pull rod 3 relative to the push-pull rod 3 until the positioning block 61 is disengaged 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, and the push-pull rod 3 is manually pulled, which can make the push-pull rod 3 drive the puncture tube 1 to move toward the puncture head 11 side, that is, the puncture tube 1 moves toward the far hand end side, so that the grasping forceps head 21 can gradually retract into the puncture tube 1. During the axial movement 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 of the movable block 6, which is located on the side facing the movement direction of the sliding block 63, is in a compressed and deformed state. Until the positioning block 61 rotates the push-pull rod 3 away from the puncture head 11, whichever end of the two ends is in the L-shaped depression, at which point the spring body 66 in the accommodating chamber 65 returns to the return action, and the movable block 6 moves with the positioning block 61, causing the positioning block 61 to rotate the push-pull rod 3 away from the puncture head 11 and contact the end of the two ends in the L-shaped depression. As the push-pull rod 3 moves 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 returns to its elastic natural state under the elastic return action. In this way, the integrated puncture grasping forceps is switched to a state for puncture, and the limiting column 64 is located at the end of the inclined slot 75 of the shift block 7 relatively away from the puncture head 11. In this state, when no pressure is applied to the shift block 7 to cause the elastic block 73 to retract into the receiving slot of the trigger portion 72 to move the shift block 7 away from the puncture head 11, the entire shift block 7, the positioning block 61, the push-pull rod 3, and the elastic connector 5 in a stretched and deformed state all maintain relative stability, thereby maintaining the stability of the grasping forceps head 21 being completely accommodated in the puncture tube 1, thereby ensuring the normal use of the puncture function.

[0098] Furthermore, whether the integrated 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 to adjust the operating angle.

[0099] The above specific embodiments further illustrate the objectives, 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 scope of protection of the present invention.

[0100] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0101] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0102] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0103] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0104] In the present invention, unless otherwise expressly specified or 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 being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the 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 the 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. An integrated puncture 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. The handle portion is provided with a movable handle connected to the pull rod for driving the grasping forceps head to open and close, and the movable handle is connected to a firing linkage structure. The firing linkage structure includes a connecting rod connected to the movable handle, a sliding seat connected to the connecting rod, a toothed portion formed on the sliding seat and distributed in a strip shape, and a pawl suitable for engaging with the toothed portion; A coil spring is provided between the pawl and the handle; a toggle button for shifting the pawl is slidably connected to the handle; a snap-in groove for snapping onto the rotating seat is formed in the handle; The rotating seat is integrally formed with a connector for inserting into the handle portion; 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; 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 movement 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 further provided between the rotating seat and the push-pull rod; a movable block is movably connected to the rotating seat, and a positioning block is provided on the movable block that is suitable for extending into the strip-shaped limiting groove, 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 shift block is movably mounted on the rotating seat; the shift block is connected to the movable block, that is, the shift block is suitable for driving the movable block to move so as to switch the cooperation and disengagement between the positioning block and the positioning notch.

2. The integrated puncture grasping forceps according to claim 1, characterized in that: The sliding seat is provided with strip-shaped hollow grooves distributed along its sliding direction; A spring suitable for stretching and deformation is provided between the inner cavity wall of the handle portion and the groove wall of the strip-shaped hollow groove.

3. The integrated puncture grasping forceps according to claim 1, characterized in that: A pull rod seat is provided between the gripping clamp tube and the pull rod; The grasping clamp tube is fixedly connected to the pull rod seat; and The pull rod is rotatably engaged with the pull rod seat; An annular groove is formed on the end of the pull rod connected to the pull rod seat, and a pair of clamping joints are formed on the end of the pull rod seat facing the pull rod and suitable for being clamped into the annular groove; The pull rod seat is arranged in the rotating seat, and is suitable for moving along the axial direction of the pull rod in the rotating seat; and the pull rod seat is suitable for rotating relative to the pull rod when performing synchronous rotation movement with the rotating seat.

4. The integrated puncture 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 adapted to be coupled with the 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.

5. The integrated puncture 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 provided between the movable handle and the handle portion, and an elastic connecting body is provided between the movable handle and the handle portion.

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

7. The integrated puncture 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 oblique shape relative to the axial movement direction of the push-pull rod; The limiting column partially 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 limiting column moves in the inclined sliding groove to enable the sliding block to move relative to the movable block along a moving direction perpendicular to the shift block.

8. The integrated puncture grasping forceps according to claim 1, characterized in that: An accommodating cavity is formed in the movable block and on both sides of the limiting column, and a spring body is embedded in each accommodating 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.

Images