Ablation forceps

Abstract

The present application relates to a kind of ablation forceps, it relates to the field of cryoablation surgical technique, for realizing single hand quick operation ablation forceps, make it switch between clamping state and loose state.The ablation forceps of the present application includes clamping element, first actuating element and second actuating element, when clamping element is switched to first state, operator can control first actuating element with single hand, to switch clamping element from second state to first state, second actuating element is locked with first actuating element at this time, can make clamping element keep in first state to carry out treatment;And operator need not change hand to control second actuating element, make it with first actuating element unlock, then clamping element restores to second state, therefore operator can conveniently and quickly control ablation forceps to switch between first state and second state with single hand, to be able to improve surgical efficiency and reduce the damage to surrounding tissue.

Description

[0001] This case is a divisional application of Chinese patent CN202111370554.7 and ablation forceps. Technical Field

[0002] This invention relates to the field of cryoablation surgery technology, and particularly to an ablation forceps. Background Technology

[0003] During cardiac ablation, a tight clamping of the ablation line is necessary to ensure efficiency and assess ablation effectiveness. Considering the surgical environment and the precise time requirements of ablation, surgeons need convenient and quick control of the ablation forceps, switching between clamped and released states. Current ablation forceps are generally grip-type, with the forceps' position adjusted by pressing a push rod at the rear. That is, pressing the push rod with one hand switches the forceps to the clamped state for treatment; after treatment, pressing the limit button and simultaneously pulling out the push rod switches the forceps to the released state. Therefore, switching between these two states cannot be done with one hand but requires two, making the process laborious, slow, and inconvenient, easily prolonging the ablation process and potentially damaging surrounding tissues. Summary of the Invention

[0004] This invention provides an ablation forceps for enabling rapid one-handed operation of the ablation forceps, allowing it to switch between a clamping state and a loosening state.

[0005] This invention provides an ablation forceps, comprising:

[0006] A clamping element includes a first clamping body and a second clamping body. The clamping element has a first state and a second state. The first state is a state in which the first clamping body and the second clamping body are close to each other to achieve clamping. The second state is a state in which the first clamping body and the second clamping body are far apart from each other.

[0007] A first actuating element is connected to one of the first clamping body or the second clamping body, the first actuating element being configured such that, when actuated, it brings the first clamping body and the second clamping body closer together; and

[0008] A second actuating element is connected to the first actuating element. The second actuating element is configured to lock with the first actuating element when the first actuating element is actuated to its maximum actuation position, so that the clamping element is held in a first state or a second state; and when the second actuating element is actuated, it is unlocked from the first actuating element, so that the clamping element returns to the second state.

[0009] In one embodiment, the first actuating element includes a motherboard, which includes a first pivot portion and connecting bodies and actuating bodies located on both sides of the first pivot portion. The connecting bodies are connected to one of the first clamping body or the second clamping body.

[0010] When the actuator rotates along the first pivot, it causes one of the first clamping body and the second clamping body to move closer to the other.

[0011] In one embodiment, the second actuating element includes a secondary trigger, which includes a second pivot portion and locking and unlocking portions located on both sides of the second pivot portion. The locking portions are connected to locking protrusions on the actuating body.

[0012] When the actuator is actuated, the locking part locks with the locking protrusion; when the unlocking part is actuated, the locking part unlocks with the locking protrusion.

[0013] In one embodiment, one end of the locking part is provided with a hook-shaped structure, and the locking protrusion has an inclined end face and a recess located behind the inclined end face. The hook-shaped structure can slide on the inclined end face into the recess so that the locking part locks with the locking protrusion.

[0014] In one embodiment, the connector includes a downwardly extending arm and a closed or open annular structure sleeved on the outer wall of the first clamping body, wherein the downwardly extending arm extends downward from the annular structure to connect with the actuator.

[0015] When the actuator rotates along the first pivot, it drives the downwardly extending arm to rotate, thereby causing the annular structure to act on the first clamping body, so as to convert the rotational motion of the actuator into the translational motion of the first clamping body.

[0016] In one embodiment, the first actuating element includes an actuating rod, one end of which is connected to one of the first clamping body or the second clamping body, and the other end of which is a pressing end.

[0017] When the actuating rod moves, it causes one of the first clamping body and the second clamping body to move closer to the other.

[0018] In one embodiment, the actuating rod is provided with a guide groove, the end of which is a locking cavity, and the second actuating element includes an elastic locking rod;

[0019] When the actuating rod moves, the elastic locking rod slides in the guide groove into the locking cavity, and the elastic locking rod switches from a contracted state to an extended state to lock with the actuating rod.

[0020] In one embodiment, the second actuating element further includes a finger-shaped unlocking member. A wedge-shaped block is provided on the elastic locking rod. When the pressing end is subjected to force, the finger-shaped unlocking member moves and squeezes the wedge-shaped block, causing the elastic locking rod to switch from an extended state to a retracted state, thereby unlocking it from the actuating rod.

[0021] In one embodiment, a third actuating element is further included, the third actuating element being connected to one of the first clamping body or the second clamping body, the third actuating element being configured to, when the second actuating element is unlocked from the first actuating element, move the first clamping body and the second clamping body away from each other and reset the first actuating element and the second actuating element.

[0022] In one embodiment, the third actuating element further includes a reset bump, which resets the second actuating element when it moves to contact the reset bump.

[0023] In one embodiment, the device further includes a housing and a working fluid conveying member, the housing accommodating a portion of the clamping element, a portion of the first actuating element, and a portion of the second actuating element;

[0024] The working medium conveying component is connected to the first clamping body or the second clamping body, and the working medium conveying component is used to connect to an external working medium source;

[0025] The housing is provided with a fixing structure, which is used to fix the working medium conveying component to the housing.

[0026] In one embodiment, the fixing structure includes:

[0027] A cover body, rotatably connected to the housing, having a fastening part at its lower end that matches the outer surface of the working fluid conveying component; and

[0028] An elastic sliding member, when it slides on the cover to engage with the locking block inside the housing, the locking part abuts against the outer surface of the working fluid conveying member to fix the working fluid conveying member.

[0029] Compared with the prior art, the advantages of the present invention are that when the clamping element is switched to the first state, the operator can control the first actuating element with one hand to switch the clamping element from the second state to the first state. At this time, the second actuating element is locked with the first actuating element, which can keep the clamping element in the first state for treatment. Moreover, the operator can control the second actuating element without switching hands to unlock it from the first actuating element, and the clamping element returns to the second state. Therefore, the operator can conveniently and quickly control the ablation forceps to switch between the first and second states with one hand, thereby improving surgical efficiency and reducing damage to surrounding tissues. Attached Figure Description

[0030] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0031] Figure 1 and Figure 2 This is a three-dimensional structural diagram of the ablation forceps in Embodiment 1 of the present invention;

[0032] Figure 3 This is a cross-sectional view of the ablation forceps in Embodiment 1 of the present invention, wherein the clamping element is in the second state;

[0033] Figure 4 This is a cross-sectional view of the ablation forceps in Embodiment 1 of the present invention, wherein the clamping element is in a first state;

[0034] Figure 5a This is a partial cross-sectional view of the ablation forceps in Embodiment 1 of the present invention;

[0035] Figure 5b yes Figure 5a Enlarged view at point A;

[0036] Figure 6a This is a partial three-dimensional sectional view of the ablation forceps in Embodiment 1 of the present invention;

[0037] Figure 6b yes Figure 6a Enlarged view at point B;

[0038] Figure 6c This is a schematic diagram of the connector structure in another embodiment of the present invention;

[0039] Figure 7 This is a three-dimensional structural schematic diagram of the working fluid conveying component in Embodiment 1 of the present invention;

[0040] Figure 8 This is a partial cross-sectional view of the ablation clamp in Embodiment 1 of the present invention, wherein the secondary trigger is unlocked from the main board (the working fluid delivery component is not shown for easy observation);

[0041] Figure 9This is a partial cross-sectional view of the ablation clamp in Embodiment 1 of the present invention, wherein the secondary trigger is locked to the main trigger (the working fluid delivery component is not shown for easy observation);

[0042] Figure 10 This is a schematic diagram of the fixing structure in Embodiment 1 of the present invention;

[0043] Figure 11 This is a front view of the ablation forceps in Embodiment 2 of the present invention;

[0044] Figure 12 This is a three-dimensional structural diagram of the ablation forceps in Embodiment 2 of the present invention, wherein the shell is not shown;

[0045] Figure 13 This is a partial schematic diagram of the ablation forceps in Embodiment 2 of the present invention;

[0046] Figure 14 This is a schematic diagram of the actuator rod structure in Embodiment 2 of the present invention (viewed from below the actuator rod);

[0047] Figure 15 This is a three-dimensional structural diagram of the shell in Embodiment 2 of the present invention;

[0048] Figure 16 This is a schematic diagram of the internal structure of the shell in Embodiment 2 of the present invention.

[0049] Figure label:

[0050] 1-Clamping element; 11-First clamping body; 11a-First clamping plate; 11b-First tube; 11c-Connector; 12a-Second clamping plate; 12b-Second tube; 12c-Receiving groove;

[0051] 12-Second clamping body;

[0052] 2-First actuating element;

[0053] 21-Main board; 211-First pivot part; 212-Connector; 213-Actuator; 213a-U-shaped part; 213b-Insertion plate; 214-Locking protrusion; 214a-Inclined end face; 214b-Recess; 212a-First upward extending arm; 212b-Second upward extending arm; 212c-Downward extending arm; 212d-Annular structure; 212e-Reinforcing rod;

[0054] 22-Actuating rod; 22a-Pressing end; 221-Guide groove; 222-Locking cavity;

[0055] 3-Second actuating element;

[0056] 31-Secondary trigger; 311-Second pivot; 312-Locking part; 313-Unlocking part; 314-Hook-shaped structure;

[0057] 32-Elastic locking lever; 321-Limit button; 322-Push spring; 323-Wedge block; 33-Finger unlocking element;

[0058] 4-Third actuating element; 41a-Coarse spring; 41b-Fine spring; 41c-Baffle; 42-Reset protrusion;

[0059] 5, 50 - Housing; 51 - Handle; 511 - Slot; 52 - Snap-fit ​​block;

[0060] 501 - Protruding Post;

[0061] 6-Fixed structure; 61-Cover; 611-Snap-fit ​​part; 611a-Snap-fit ​​plate; 611b-Semi-circular groove; 62-Elastic sliding element; 621-Slider; 622-Spring plate; 623-Activation notch;

[0062] 7-Working medium delivery component; 71-Tank body; 72-Vacuum port; 73-Treatment end. Detailed Implementation

[0063] The invention will now be further described with reference to the accompanying drawings.

[0064] like Figure 1-16 As shown, the present invention provides an ablation clamp, including a clamping element 1, a first actuating element 2, and a second actuating element 3. The operator can operate the first actuating element 2 and the second actuating element 3 with one hand, thereby achieving quick and convenient control of the clamping element 1 to tightly clamp the target tissue at the ablation line, so as to ensure the efficiency and effect of ablation.

[0065] Specifically, the clamping element 1 includes a first clamping body 11 and a second clamping body 12. The clamping element 1 has a first state and a second state. The first state is that the first clamping body 11 and the second clamping body 12 are close to each other to achieve clamping. The second state is that the first clamping body 11 and the second clamping body 12 are far apart from each other. In the first state of the clamping element 1, the first clamping body 11 and the second clamping body 12 are close to each other until the first clamping plate 11a at the front end of the first clamping body 11 and the second clamping plate 12a at the front end of the second clamping body 12 tightly clamp the target tissue at the ablation line in order to perform the ablation operation.

[0066] The first actuating element 2 is connected to either the first clamping body 11 or the second clamping body 12. The first actuating element 2 is configured such that when it is actuated, the first clamping body 11 and the second clamping body 12 move closer to each other, thereby allowing the clamping element 1 to switch from a second state to a first state. The second actuating element 3 is connected to the first actuating element 2. The second actuating element 3 is configured such that when the first actuating element 2 moves to its maximum actuation position, the second actuating element 3 locks with the first actuating element 2 to keep the clamping element 1 in the first state; and when the second actuating element 3 is actuated, it unlocks from the first actuating element 2 to restore the clamping element 1 to the second state.

[0067] Therefore, when switching the clamping element 1 to its first state, only the first actuating element 2 needs to be actuated. When it reaches its maximum position, the first actuating element 2 and the second actuating element 3 are locked. Conversely, when switching the clamping element 1 to its second state, only the second actuating element 3 needs to be actuated. Then the first actuating element 2 and the second actuating element 3 are unlocked, and the clamping element 1 returns to the second state.

[0068] Furthermore, in order to facilitate the return of the clamping element 1 from the first state to the second state, the ablation forceps of the present invention also includes a third actuating element 4. The third actuating element 4 is connected to one of the first clamping body 11 or the second clamping body 12. The third actuating element 4 is configured such that when the second actuating element 3 is unlocked from the first actuating element 2, the first clamping body 11 and the second clamping body 12 move away from each other, so that the clamping element 1 can be switched from the first state to the second state, and the first actuating element 2 and the second actuating element 3 can also be reset.

[0069] The specific construction of the ablation forceps of the present invention will be exemplified below by way of embodiments, wherein one or more examples are shown in the accompanying drawings. Each example is provided for the purpose of illustrating the invention and should not be construed as limiting the invention. For example, features shown or described as part of an embodiment may be used in other embodiments or associated with other embodiments to produce another embodiment. It should be understood that the invention should include all such modifications and variations.

[0070] Example 1

[0071] Figure 1-10 The specific structure of the ablation forceps in this embodiment is shown. In this embodiment, the ablation forceps includes a housing 5 that is generally pistol-shaped, such as... Figure 3 and 4 As shown, the housing 5 houses a portion of the clamping element 1, a portion of the first actuating element 2, and a portion of the second actuating element 3. A handle 51 is provided on the lower side of the housing 5. The first actuating element 2 and the second actuating element 3 are both located on the front side of the handle 51, so that when the operator holds the handle 51, he / she can actuate the first actuating element 2 or the second actuating element 3 with his / her fingers.

[0072] like Figure 5a and Figure 5b As shown, the first actuating element 2 includes a motherboard 21, which includes a first pivot portion 211 and connecting bodies 212 and actuators 213 located on both sides of the first pivot portion 211. The connecting bodies 212 are connected to one of the first clamping body 11 or the second clamping body 12. When the actuator 213 rotates along the first pivot portion 211, it causes one of the first clamping body 11 and the second clamping body 12 to move closer to the other.

[0073] For example, the connector 212 is connected to the first clamping body 11. When a rearward force is applied to the actuator 213, the actuator 213 rotates counterclockwise along the first pivot 211, thereby transmitting the force to the connector 212. Driven by the connector 212, the first clamping body 11 moves towards the second clamping body 12 to achieve clamping (e.g., ...). Figure 4 (As shown). It can be seen that the connecting body 212 converts the rotational motion of the actuator 213 into the translational motion of the first clamping body 11.

[0074] The first pivoting part 211 is a pivoting shaft, and the first actuating element 2 is rotatably connected to the housing 5 through the first pivoting part 211. Specifically, as shown... Figure 6a As shown, the actuator 213 includes a U-shaped portion 213a and a pair of insert plates 213b symmetrically arranged on both sides of the U-shaped portion 213a. The U-shaped portion 213a is ergonomically designed to fit the operator's fingers. When the operator grips the handle 51, their fingers can extend through the notch of the U-shaped portion 213a to contact the longer arm of the U-shaped portion 213a and apply a rearward force to it, thereby rotating the U-shaped portion 213a closer to the handle 51 (e.g., ...). Figure 9 (As shown).

[0075] like Figure 8 As shown, a slot 511 is also provided on the front side of the handle 51. When the U-shaped part 213a rotates to a position close to the handle 51, the insert plate 213b is inserted into the slot 511. Therefore, when the U-shaped part 213a rotates to its maximum stroke, it can completely fit against the outside of the handle 51, so that the operator can hold it as a whole. This position is the maximum actuation position of the first actuating element 2 (main board 21).

[0076] Please continue reading Figure 5a and Figure 5b The second actuating element 3 includes a secondary trigger 31, which includes a second pivot 311 and a locking part 312 and an unlocking part 313 located on both sides of the second pivot 311. The locking part 312 is connected to the locking protrusion 214 on the actuating body 213.

[0077] The second pivot part 311 is a pivot shaft, and the second actuating element 3 is rotatably connected to the housing 5 through the second pivot part 311. When the actuating body 213 is actuated, the locking part 312 locks with the locking protrusion 214; when the unlocking part 313 is actuated, the locking part 312 unlocks with the locking protrusion 214.

[0078] Specifically, one end of the locking part 312 is provided with a hook-shaped structure 314. The locking protrusion 214 has an inclined end face 214a and a recess 214b, wherein the recess 214b is located behind the inclined end face 214a. The hook-shaped structure 314 can slide on the inclined end face 214a into the recess 214b to lock the locking part 312 with the locking protrusion 214.

[0079] When the U-shaped portion 213a is actuated and rotates counterclockwise, the hook-shaped structure 314 can slide on the inclined end face 214a. When the U-shaped portion 213a rotates to its maximum position, the hook-shaped structure 314 falls into the recess 214b from the rear side of the inclined end face 214a (as shown in the image). Figure 4 and Figure 9 As shown in the figure, the hook structure 314 and the recess 214b are locked together, and the first clamping body 11 and the second clamping body 12 are in a stable clamping state, thereby enabling the treatment of the target tissue.

[0080] The locking protrusion 214 can correspond one-to-one with the insert plate 213b, that is, the locking protrusion 214 can be set as two symmetrical pieces with a gap between the two locking protrusions 214. One end of the connector 212 is inserted into the gap and connected to a pair of insert plates 213b.

[0081] Specifically, please see Figure 6a and Figure 6b The connector 212 can be constructed as a Y-shaped structure, having two upwardly extending arms (i.e., a first upwardly extending arm 212a and a second upwardly extending arm 212b) and a downwardly extending arm 212c. The first upwardly extending arm 212a and the second upwardly extending arm 212b can be slightly bent to form a closed or open annular structure 212d, which is fitted onto and connected to the outer wall of the first clamping body 11. The downwardly extending arm 212c is inserted into the gap between the two locking protrusions 214 described above and is connected to a pair of insert plates 213b. Therefore, when the U-shaped part 213a is actuated and rotates counterclockwise, the downwardly extending arm 212c of the connecting body 212 is actuated together with the insert plate 213b, which in turn causes the annular structure 212d sleeved on the outer wall of the first clamping body 11 to drive the first clamping body 11 to translate. This achieves the purpose of converting the rotational motion of the actuator 213 (U-shaped part 213a) into the translational motion of the first clamping body 11.

[0082] Furthermore, the annular structure 212d is also connected to the third actuating element 4 sleeved on the outer wall of the first clamping body 11. Therefore, when the annular structure 212d drives the first clamping body 11 to translate, it also compresses the third actuating element 4. When the force on the U-shaped portion 213a is removed, the restoring force of the third actuating element 4 will act on the annular structure 212d, thereby causing the annular structure 212d to drive the first clamping body 11 to translate in the opposite direction and reset.

[0083] Therefore, the advantage of constructing the connector 212 as a Y-shaped structure is that, on the one hand, the Y-shaped structure is easy to assemble, and its upper and lower parts can be connected to the first clamping body 11 and a pair of insert plates 213b respectively; on the other hand, since the force of the third actuating element 4 is relatively large, the Y-shaped connector 212 can also ensure uniform force distribution. Specifically, the connector 212 is subjected to uniform force during movement, so its force will be evenly applied to the first clamping body 11, thereby ensuring that the first clamping body 11 and the second clamping body 12 are subjected to uniform force in the clamping state. Then, the first clamping plate 11a at the front end of the first clamping body 11 and the second clamping plate 12a at the front end of the second clamping body 12 can be evenly engaged together. Therefore, no gap will be generated between the clamping forceps and the target tissue after clamping. This ensures that the target tissue clamped between the first clamping plate 11a and the second clamping plate 12a obtains a uniform freezing effect during the ablation operation, thus avoiding the situation where multiple freezing operations are required due to poor freezing effect in one operation.

[0084] Understandably, the aforementioned "Y-shaped structure" is intended to better describe the exemplary structure of the connector 212, and does not imply that the structure of the connector 212 must strictly conform to the "Y" shape. In other words, the downwardly extending arm 212c of the connector 212 does not necessarily extend in a straight line; it can also extend along a curve, thus the downwardly extending arm 212c can present a curved structural form. Furthermore, the connection between the downwardly extending arm 212c and the closed or open annular structure 212d of the connector 212 is not necessarily through a straight plate structure, but can also be connected through a curved arc structure, thereby allowing the connector 212 to present an overall arc-shaped structure, such as... Figure 6c It is best shown in the middle.

[0085] exist Figure 6c In the illustrated embodiment, the connector 212 has an overall arc-shaped structure that bends backward. Therefore, to ensure its strength, a reinforcing rod 212e is provided at the bend of the connector 212. The reinforcing rod 212e connects the annular structure 212d to the downwardly extending arm 212c, thereby ensuring the overall strength of the connector 212.

[0086] When the hook-shaped structure 314 and the recess 214b are locked together, the two can be unlocked by actuating the unlocking part 313. Specifically, by applying a rearward force to the unlocking part 313 to rotate it counterclockwise, the hook-shaped structure 314 can be lifted to separate it from the recess 214b, thereby unlocking the first actuating element 2 and the second actuating element 3.

[0087] After the first actuating element 2 and the second actuating element 3 are unlocked, the actuation of the third actuating element 4 causes the first clamping body 11 to move in the opposite direction, thereby pushing the two upwardly extending arms 212a and 212b of the connecting body 212 backward. The connecting body 212 then transmits this force to the actuating body 213, causing it to rotate clockwise and move away from the handle 51. Thus, the connecting body 212 converts the translational motion of the first clamping body 11 into the rotational motion of the actuating body 213, thereby resetting the first actuating element 2.

[0088] When the actuator 213 rotates clockwise, the hook-shaped structure 314 can move from the rear part of the inclined end face 214a to its front part, thereby resetting the second actuator 3 (e.g., Figure 3 (As shown).

[0089] To facilitate one-handed operation, the unlocking part 313 is located on the upper side of the shorter arm of the U-shaped part 213a and on the lower side of the housing 5. Figure 5a The positions of both parts can be optimally observed from the center, so the shorter arm of the U-shaped part 213a can partially block the unlocking part 313. When the operator's finger is inserted through the notch of the U-shaped part 213a, the unlocking part 313 will not be accidentally operated, causing the clamping element 1 to switch to an undesirable second state. Furthermore, when it is necessary to switch the clamping element 1 to its second state, it can be actuated by the hand currently holding the handle 51, thereby unlocking the secondary trigger 31 and the main board 21, thus conforming to ergonomic design.

[0090] In this embodiment, both the first clamping body 11 and the second clamping body 12 are constructed as tubular structures, and the first clamping body 11 is sleeved on the second clamping body 12. The first clamping body 11 can translate relative to the second clamping body 12 along its axis.

[0091] Specifically, such as Figure 1As shown, the first clamping body 11 includes a first tube 11b and a first clamping plate 11a disposed at the end of the first tube. The first clamping plate 11a has an angle with the axial direction of the first tube 11b, which may be slightly greater than 90 degrees. The second clamping body 12 includes a second tube 12b and a second clamping plate 12a disposed at the end of the second tube. A receiving groove 12c is provided on the side of the second clamping plate 12a near the first clamping plate 11a. The second tube 12b extends from the end of the first tube 11a, forming a clamping space between the first clamping plate 11a and the second clamping plate 12a. The working fluid delivery member 7, described below, extends from the end of the second tube 12b, and the treatment end 73 of the working fluid delivery member 7 is received in the receiving groove 12c in a shape that substantially conforms to the receiving groove 12c. Thus, when the first tube 11b is pushed forward, the first clamping plate 11a approaches the second clamping plate 12a, thereby clamping the target tissue within the clamping space and performing treatment. After treatment, the first tube 11b moves away from the second clamping body 12, and the first clamping plate 11a moves away from the second clamping plate 12a and releases the target tissue.

[0092] The third actuating element 4 includes at least one spring. In this embodiment, the third actuating element 4 includes two springs 41a and 41b. Preferably, the two springs 41a and 41b are different springs. For example, they are a coarse spring 41a and a fine spring 41b, both of which are sleeved on the outer wall of the first clamping body 11. One end of the fine spring 41b can be connected to the inner wall of the housing 5, and the other end can be connected to the coarse spring 41a. The coarse spring 41a can be connected to the two upwardly extending arms 212a and 212b of the connecting body 212, such as... Figure 6b As shown. Therefore, when the U-shaped part 213a is actuated and rotates counterclockwise, the connecting body 212 compresses the coarse spring 41a and the fine spring 41b and drives the first clamping body 11 to translate; conversely, when the first actuating element 2 and the second actuating element 3 are unlocked, the coarse spring 41a and the fine spring 41b extend, thereby pushing the first clamping body 11 to move in the opposite direction, so that the U-shaped part 213a is reset.

[0093] The terms "coarse spring" 41a and "fine spring" 41b are relative to each other. "Coarse spring" 41b refers to a spring with a larger diameter wire, while "fine spring" 41b refers to a spring with a smaller diameter wire. By using two types of springs, the clamping mechanism can accommodate the size of objects between the first clamping body 11 and the second clamping body 12 within a certain range while maintaining a clamping state.

[0094] The working fluid delivery component 7 passes through the second clamping body 12 and is used to connect to an external working fluid source to deliver the therapeutic working fluid to its treatment end 73. Therefore, the working fluid delivery component 7 needs to form a stable connection with the first clamping body 11 or the second clamping body 12.

[0095] Specifically, such as Figure 6a and Figure 6b As shown, a connector 11c is provided at the rear end of the first tube 11b of the first clamping part 11, and the working fluid conveying component 7 can extend into and pass through the second tube 12b of the second clamping body 12 from the connector 11c. Figure 10 As shown, a fixing structure 6 is provided on the housing 5, which is used to fix the working medium conveying component 7 to the housing 5. Specifically, the fixing structure 6 includes a cover 61 and an elastic sliding component 62. The cover 61 is rotatably connected to the housing 5, and a fastening part 611 is provided at the lower end of the cover 61, which matches the outer surface of the working medium conveying component 7.

[0096] like Figure 5a , Figure 7 and Figure 10 As shown, the outer surface of the working medium conveying component 7 is provided with a groove 71, and the fastening part 611 includes a fastening plate 611a and a semi-circular groove 611b provided at the lower end of the fastening plate 611a. When the cover 61 is rotated and closed, the fastening plate 611 is aligned with the radial direction of the working medium conveying component 7, so that the semi-circular groove 611b is engaged with the groove 71, thereby restricting the circumferential and radial degrees of freedom of the working medium conveying component 7.

[0097] Furthermore, such as Figure 10 As shown, the cover 61 is provided with a pair of sliding grooves 612, and the elastic sliding member 62 is provided with a pair of sliders 621. The sliders 621 are respectively disposed in the corresponding sliding grooves 612 and can slide in the sliding grooves 612. A spring plate 622 connects the pair of sliders 621. The sliders 621 are roughly L-shaped. The spring plate 622 pushes the sliders 621 against the fastening plate 611a, so the sliders 621 can form a locking notch 623 with the fastening plate 611a. When the cover 61 rotates clockwise and closes, the locking block 52 on the inner side of the housing 5 inserts into the locking notch 623, thereby locking the cover 61. At this time, the cover 61 cannot rotate, thus fixing the working fluid conveying member 7.

[0098] Conversely, when the slider 621 of the elastic sliding member 62 slides away from the fastening plate 611a in the groove 612, the spring plate 622 is compressed, and the slider 621 leaves the fastening plate 611a. Then the locking block 52 disengages from the locking notch 623, thereby unlocking the cover 61. At this time, the cover 61 can be rotated counterclockwise to open, which facilitates the replacement of the working fluid conveying member 7.

[0099] In addition, such as Figure 7 As shown, the working medium delivery component 7 is also provided with a vacuum port 72. The non-treatment area of ​​the working medium delivery component 7 is evacuated through the vacuum port 72 to form a vacuum layer, thereby providing heat insulation in the non-treatment area.

[0100] Example 2

[0101] Figure 11-16 The specific structure of the ablation forceps in this embodiment is shown. In this embodiment, as... Figure 11 As shown, the ablation forceps includes an irregular housing 50, which houses a portion of the clamping element 1, a portion of the first actuating element 2, and a portion of the second actuating element 3.

[0102] Among them, such as Figure 12 and Figure 13 As shown, the first actuating element 2 includes an actuating rod 22, one end of which is connected to one of the first clamping body 11 or the second clamping body 12, and the other end of the actuating rod 22 is a pressing end 22a, which extends from one end of the housing 50 to facilitate the operator to apply force.

[0103] When the pressing end 22a is pressed, the actuating rod 22 moves, causing one of the first clamping body 11 and the second clamping body 12 to move closer to the other. For example, the actuating rod 22 is connected to the first clamping body 11. When an axial force is applied to the pressing end 22a, the actuating rod 22 moves forward, thereby driving the first clamping body 11 to move closer to the second clamping body 12 to achieve clamping.

[0104] Furthermore, such as Figure 13 and Figure 15 As shown, guide grooves 221 are provided on both sides of the actuating rod 22, and the end of the guide groove 221 is a locking cavity 222. The width of the locking cavity 222 is greater than the width of the guide groove 221. The second actuating element 3 includes an elastic locking rod 32. When the actuating rod 22 moves, the elastic locking rod 32 slides in the guide groove 221 into the locking cavity 222. The elastic locking rod 32 switches from a contracted state to an extended state to lock with the actuating rod 22. The position where the elastic locking rod 32 locks with the actuating rod 22 is the maximum actuation position of the first actuating element 2 (actuating rod 22).

[0105] Specifically, such as Figure 12 and Figure 14 As shown, the elastic locking lever 32 includes a pair of limit buttons 321 and a push spring 322. The pair of limit buttons 321 slide in corresponding guide grooves 221. The push spring 322 is connected to a protruding post 501 on the housing 50.

[0106] The width of the limit button 321 is greater than the width of the guide groove 221 and less than the width of the locking cavity 222. Therefore, when the limit button 321 slides in the guide groove 221, it will not fall into the guide groove 221, but when it slides in the guide groove 221 into the locking cavity 222, it can fall into the locking cavity 222.

[0107] When the limit button 321 slides in the guide groove 221, the push spring 322 is compressed. When the limit button 321 falls into the locking cavity 222, the push spring 322 extends, thereby locking the elastic locking rod 32 and the actuating rod 22 together.

[0108] like Figure 14 and Figure 16 As shown, the second actuating element 3 also includes a finger-shaped unlocking member 33, which is disposed on the housing 50 and can slide on the housing 50. The finger-shaped unlocking member 33 and the protruding post 501 are respectively located on opposite sides of the housing 50.

[0109] The elastic locking lever 32 is provided with a wedge block 323. When the pressing end is subjected to force, the finger-shaped unlocking member 33 moves and squeezes the wedge block 323, causing the elastic locking lever 32 to switch from the extended state to the retracted state, thereby unlocking it from the actuating lever 22.

[0110] like Figure 13 As shown, the third actuating element 4 includes at least one spring. Similar to the above embodiment, the third actuating element 4 includes two springs. Preferably, the two springs are different springs. For example, they are a coarse spring 41a and a fine spring 41b, respectively. The coarse spring 41a is disposed on the outer wall of the second tube 12b of the second clamping body 12, and the fine spring 41b is sleeved on the outer wall of the first tube 11b of the first clamping body 11. One end of the fine spring 41b can be connected to the inner wall of the housing 5, and the other end is connected to the baffle 41c on the second tube 12b. One end of the coarse spring 41a is connected to the actuating rod 22. Therefore, when the actuating rod 22 is actuated and moves forward, it pushes and compresses the coarse spring 41a, causing it to contact the baffle 41c, thereby pushing the first clamping body 11 to move and compressing the fine spring 41b; conversely, when the first actuating element 2 and the second actuating element 3 are unlocked, the coarse spring 41a and the fine spring 41b extend, thereby pushing the first clamping body 11 to move in the opposite direction, so that the actuating rod 22 is reset.

[0111] When the actuating rod 22 moves forward, it drives the first clamping body 11 to translate, and one or both of the two springs are compressed; conversely, when the first actuating element 2 and the second actuating element 3 are unlocked, the two springs extend, thereby pushing the first clamping body 11 to move in the opposite direction so that the actuating rod 22 is reset.

[0112] The third actuating element 4 also includes a reset bump 42. When the second actuating element 3 moves to contact the reset bump 42, the reset bump 42 resets the second actuating element 3.

[0113] Specifically, when the pressing end 22a is pressed again, the actuating rod 22 continues to move forward (although the actuating rod 22 continues to move forward at this time, it no longer has an actuating function), then the wedge block 323 contacts the finger-shaped unlocking member 33. As the finger-shaped unlocking member 33 continues to move, the wedge block 323 is squeezed by the finger-shaped unlocking member 33, so the push spring 322 is compressed, and the limit button 321 is disengaged from the locking cavity 222 and can move in the guide groove 221, thereby resetting the actuating rod 22.

[0114] As the finger-shaped unlocking member 33 continues to move with the movement of the actuating rod 22, it will touch the reset protrusion 42. Since the reset protrusion 42 is fixed on the outside of the housing 50 and does not move with the actuating rod 22, the finger-shaped unlocking member 33 is pushed backward relative to the actuating rod 22 by the reset protrusion 42, thereby resetting the finger-shaped unlocking member 33.

[0115] Therefore, in this embodiment, the operator can switch the clamping element 1 between its first and second states simply by pressing the pressing end 22a of the actuator rod 22 with one hand in one direction. The working fluid conveying component 7 can be disposed at the lower end of the housing 50 to avoid interference with the pressing end 22a.

[0116] The first clamping body 11 and the second clamping body 12 can adopt the same configuration as in Embodiment 1, and will not be described again here.

[0117] It should be noted that the terms "front side" and "rear side" are defined for the purpose of facilitating understanding of the present invention. "Front side" can be the side closer to the clamping element 1, and "rear side" can be the side farther away from the clamping element 1.

[0118] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An ablation forceps, comprising: It includes a clamping element (1), a first actuating element (2), a second actuating element (3) and a third actuating element (4). The first actuating element (2) includes a motherboard (21), the motherboard (21) includes a connector (212) and an actuator (213), the connector (212) includes a downwardly extending arm (212c) and an annular structure (212d), the annular structure (212d) is sleeved on the outer wall of the first clamping body (11) of the clamping element (1), the actuator (213) is provided with a locking protrusion (214), the downwardly extending arm (212c) extends downward from the annular structure (212d) to be inserted into the locking protrusion (214) and connected to the actuator (213), the locking protrusion (214) has an inclined end face (214a) and a recess (214b) located behind the inclined end face (214a). The second actuating element (3) includes a secondary trigger (31), which includes a locking part (312) and an unlocking part (313). One end of the locking part (312) is provided with a hook-shaped structure (314), which can slide on the inclined end face (214a). The third actuating element (4) includes at least one spring, which is connected to the first clamping body (11) and the annular structure (212d) respectively. When the actuator (213) is actuated to rotate counterclockwise, it drives the downwardly extending arm (212c) and the locking protrusion (214) to rotate, thereby causing the annular structure (212d) to compress at least one spring and drive the first clamping body (11) to translate, and the hook structure (314) slides on the inclined end face (214a) to fall into the recess (214b) so that the locking part (312) locks with the locking protrusion (214); When the unlocking part (313) is actuated and rotates counterclockwise, the hook structure (314) can be lifted to separate the hook structure (314) from the recess (214b), thereby unlocking the locking part (312) from the locking protrusion (214), and at least one spring can push the first clamping body (11) to move in the opposite direction and cause the annular structure (212d) to move in the opposite direction, thereby resetting the actuator (213).

2. The ablation forceps according to claim 1, wherein, The third actuating element (4) includes a thick spring (41a) and a thin spring (41b) connected together, wherein the diameter of the spring wire of the thick spring (41a) is larger than the diameter of the spring wire of the thin spring (41b).

3. The ablation forceps according to either of Claims 1 or 2, wherein, The downwardly extending arm (212c) extends in a straight line, and the downwardly extending arm (212c) is connected to the annular structure (212d) by a straight plate-like structure.

4. The ablation forceps according to claim 1 or 2, characterized in that, The downward extending arm (212c) extends along a curve, and the downward extending arm (212c) is connected to the ring structure (212d) by a curved arc structure, so that the connecting body (212) has an overall arc structure that bends backward. A reinforcing rod (212e) is also provided at the bend of the connecting body (212).

5. The ablation forceps according to claim 1 or 2, characterized in that, It also includes a housing (5), a handle (51) is provided on the lower side of the housing (5), and a slot (511) is provided on the front side of the handle (51). The actuator (213) includes a U-shaped portion (213a) and a pair of insert plates (213b) respectively located on both sides of the U-shaped portion (213a) and symmetrically arranged. When the U-shaped part (213a) rotates to a position close to the handle (51), the insert plate (213b) is inserted into the slot (511), and when the U-shaped part (213a) rotates to its maximum stroke, it is in complete contact with the outside of the handle (51).

6. The ablation forceps according to claim 5, characterized in that, The U-shaped part (213a) has a shorter arm and a longer arm, with a notch between them for inserting the operator's fingers. The longer arm is used to contact the operator's fingers, and the unlocking part (313) is located on the upper side of the shorter arm.

7. The ablation forceps according to claim 5, characterized in that, It also includes a working fluid conveying component (7), and a fixing structure (6) is provided on the housing (5). The fixing structure (6) is used to fix the working fluid conveying component (7) to the housing (5). The fixing structure (6) includes a cover (61) and an elastic sliding component (62). The cover (61) is rotatably connected to the housing (5). The lower end of the cover (61) is provided with a fastening part (611), and the fastening part (611) matches the outer surface of the working fluid conveying component (7).

8. The ablation forceps according to claim 7, characterized in that, The outer surface of the working medium conveying component (7) is provided with a groove (71), and the fastening part (611) includes a fastening plate (611a) and a semi-circular groove (611b) provided at the lower end of the fastening plate (611a). When the cover (61) rotates and closes, the fastening plate (611a) is aligned with the radial direction of the working medium conveying component (7), thereby engaging the semi-circular groove (611b) with the groove (71) to restrict the circumferential and radial degrees of freedom of the working medium conveying component (7).

9. The ablation forceps according to claim 8, characterized in that, The cover (61) is provided with a pair of sliding grooves (612), and the elastic sliding member (62) is provided with a pair of sliders (621). The sliders (621) are respectively disposed in the corresponding sliding grooves (612) and can slide in the sliding grooves (612); A spring plate (622) is connected between the sliders (621). The spring plate (622) pushes the sliders (621) against the fastening plate (611a), and the sliders (621) and the fastening plate (611a) form a locking notch (623). When the cover (61) is rotated clockwise and closed, the locking block (52) on the inner side of the housing (5) is inserted into the locking notch (623), thereby locking the cover (61); when the slider (621) slides away from the fastening plate (611a) in the slide groove (612), the spring plate (622) is compressed, thereby the slider (621) leaves the fastening plate (611a), and the locking block (52) disengages from the locking notch (623), thereby unlocking the cover (61).

10. The ablation forceps according to claim 7, characterized in that, The working medium delivery component (7) is also provided with a vacuum port (72), which is used to vacuum the non-treatment parts of the working medium delivery component (7) to form a vacuum layer.

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