Ablation needle handle structure and ablation needle

Abstract

The utility model relates to a handle structure of an ablation needle and an ablation needle, and relates to the field of ablation technology. The handle structure of the ablation needle of the utility model includes a handle shell and a movable adjustment tube, a slide groove and a sliding propulsion mechanism are arranged on the handle shell, and the sliding propulsion mechanism includes a pushing part and a shielding structure, the pushing part is connected to the distal end of the movable adjustment tube, and is used to drive the movable adjustment tube to move, and the shielding structure is located inside the handle shell, and the shielding structure can shield the slide groove from the inside of the handle shell, and the shielding structure will not affect the movement of the push button in the slide groove, so foreign matter will not fall into the slide groove and the handle shell, thereby solving the technical problem of jamming caused by foreign matter falling into the slide groove; and the shielding structure shields the slide groove, so that the internal structure of the handle shell will not be exposed to the outside, thereby solving the problem of leakage of the internal structure of the ablation needle, and improving the aesthetics of the handle shell and the ablation needle.

Description

Technical Field

[0001] The utility model relates to the technical field of ablation, in particular to a handle structure of an ablation needle and an ablation needle. Background Art

[0002] The handles of ablation needle products are often equipped with a propulsion mechanism, through which the size of the ablation area of ​​the ablation needle can be adjusted. The direct-push propulsion mechanism of the slide / slider has been widely used in the handles of ablation needles due to its simple structure and convenient operation. However, the slide of this type of direct-push propulsion mechanism is an exposed slide, so the internal structure of the handle is exposed. On the one hand, there is a risk of foreign matter falling into the slide and causing jamming, and on the other hand, the exposed slide will also affect the aesthetics of the product. Utility Model Content

[0003] The utility model provides a handle structure of an ablation needle and an ablation needle, which are used to solve at least one of the above-mentioned technical problems.

[0004] According to a first aspect of the utility model, the utility model provides a handle structure of an ablation needle, comprising a handle housing and a movable adjustment tube, wherein a slide groove and a sliding propulsion mechanism are provided on the handle housing, and a distal end of the movable adjustment tube extends into the handle housing;

[0005] The sliding propulsion mechanism includes a pushing portion and a shielding structure, wherein the pushing portion is connected to the distal end of the movable adjusting tube and is used to drive the movable adjusting tube to move, and the shielding structure is located inside the handle shell, and the shielding structure is configured to shield the sliding groove from the inside of the handle shell and move along with the movement of the pushing portion.

[0006] In one embodiment, the shielding structure is provided with a slideway extending spirally along its axial direction, and the pushing portion can move in the slideway and the slideway at the same time;

[0007] Wherein, the shielding structure is rotatably connected to the handle housing so that the shielding structure can rotate synchronously with the pushing portion, so that a portion of the slideway is always aligned with a portion of the slide groove.

[0008] In one embodiment, one end of the slide is an open end and the other end is a closed end, the open end is located at the end of the shielding structure, and the slide is a spiral slide extending spirally from the open end to the closed end along the axial direction of the shielding structure.

[0009] The pushing portion can enter the slideway from the open end.

[0010] In one embodiment, the pitch of the slideway is less than or equal to the maximum stroke of the pushing portion.

[0011] In one embodiment, the pushing portion comprises:

[0012] A push button, which is arranged on the outside of the handle housing and located above the slide slot;

[0013] a sliding sleeve, which is disposed in the shielding structure and connected to the distal end of the movable adjustment tube; and

[0014] A neck portion is respectively connected to the push button and the sliding sleeve and extends radially along the sliding sleeve. The neck portion passes through the slideway and the slide groove.

[0015] In one embodiment, a double torsion spring is also sleeved on the outer surface of the sliding sleeve, and the double torsion spring includes a torsion spring coil, a U-shaped pin and a plurality of straight pins. The torsion spring coil is sleeved on the sliding sleeve, and the U-shaped pin is connected to the torsion spring coil for cooperating with the shaft neck portion. The plurality of straight pins are respectively located on the sides of the torsion spring coil for abutting against the inner wall of the handle housing.

[0016] In one embodiment, a pin receiving portion recessed in a direction away from the shielding structure is provided on the inner wall of the handle housing, the pin receiving portion extends axially along the shielding structure, and the plurality of straight pins are respectively provided in the pin receiving portion.

[0017] In one embodiment, a plurality of locking grooves are provided on one or both sides of the slide groove, and the locking grooves are arranged at intervals in the moving direction of the pushing portion, and each of the locking grooves is connected to the slide groove;

[0018] The locking groove is configured to allow the journal portion to enter the locking groove from the sliding groove and prevent the journal portion from sliding out of the locking groove.

[0019] In one embodiment, the locking groove includes a groove body, a neck portion and an open portion, the groove body is configured to be recessed in a direction away from the slide groove, the size of the open portion is larger than the size of the neck portion, and the groove body is connected to the slide groove through the open portion.

[0020] According to the second aspect of the utility model, the utility model provides an ablation needle, including the above-mentioned handle structure of the ablation needle, and also including a needle rod, wherein the needle rod is arranged in the movable adjustment tube and extends into the handle shell, and when the pushing part drives the movable adjustment tube to move, the distance between the proximal end of the movable adjustment tube and the proximal end of the needle rod can be adjusted.

[0021] Compared with the prior art, the advantage of the utility model lies in that the shielding structure can shield the slide groove from the inside of the handle shell, and the shielding structure will not affect the movement of the push button in the slide groove, so foreign objects will not fall into the slide groove and the handle shell, thereby solving the technical problem of jamming caused by foreign objects falling into the slide groove; and the shielding structure shields the slide groove so that the internal structure of the handle shell will not be exposed to the outside, thereby solving the problem of leakage of the internal structure of the ablation needle and improving the aesthetics of the handle shell and the ablation needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0023] Figure 1 is a cross-sectional view of the handle structure of the ablation needle in Example 1 of the utility model;

[0024] Figure 2 is a top view of the handle structure of the ablation needle in Example 1 of the utility model;

[0025] Figure 3a yes Figure 2 A schematic diagram of the three-dimensional structure of the sliding propulsion mechanism shown;

[0026] Figure 3b yes Figure 2 A cross-sectional view of the sliding propulsion mechanism shown;

[0027] Figure 3c yes Figure 3a A schematic diagram of the three-dimensional structure of the double torsion spring shown;

[0028] Figure 4a It is a schematic diagram of the internal structure of the ablation needle of Example 1 of the utility model, in which the right shell is hidden;

[0029] Figure 4b It is a schematic diagram of the internal structure of the ablation needle of Example 1 of the utility model, in which the left shell is hidden;

[0030] Figure 4c It is a top view of the ablation needle of Example 1 of the utility model, in which the push button is hidden;

[0031] Figure 5a is a radial cross-sectional view of the ablation needle in Example 1 of the utility model;

[0032] Figure 5b It is a schematic structural diagram of the double torsion spring in the embodiment 1 of the utility model in a compressed state;

[0033] Figure 5c It is a structural schematic diagram of the double torsion spring in the embodiment 1 of the utility model in a natural state;

[0034] Figure 6 yes Figure 2 The enlarged view of point I in the middle;

[0035] Figure 7 It is a three-dimensional structural schematic diagram of the shielding structure in Example 1 of the utility model;

[0036] Figure 8 It is a schematic diagram of the sliding propulsion mechanism in the embodiment 1 of the utility model in the initial position in the housing slide groove;

[0037] Fig. 9 It is a schematic diagram of the sliding propulsion mechanism in the embodiment 1 of the utility model in the process position in the casing slide groove;

[0038] Fig.10 It is a schematic diagram of the sliding propulsion mechanism in the embodiment 1 of the utility model being in the terminal position in the housing slide groove;

[0039] Fig.11 It is a schematic diagram of the locking groove located on the left side of the slide groove in the embodiment 1 of the present utility model;

[0040] Fig.12 It is a schematic diagram of the locking groove located on the right side of the slide groove in the embodiment 1 of the present utility model;

[0041] Fig.13 It is a schematic diagram showing that the locking grooves are symmetrically distributed on the left and right sides of the slide groove in Embodiment 1 of the present utility model;

[0042] Fig.14 It is a schematic diagram showing that the locking grooves are alternately distributed on the left and right sides of the sliding groove in Example 1 of the present utility model.

[0043] Reference numerals:

[0044] 1. Handle housing; 2. Moving adjustment tube; 3. Sliding propulsion mechanism;

[0045] 11. left housing; 12. right housing; 111. pin receiving portion;

[0046] 101, slide groove; 102, scale line; 103, locking groove;

[0047] 1031, neck portion; 1032, open portion; 1033, trough body;

[0048] 310. Promotion Department;

[0049] 301, push button; 302, shaft neck; 303, sliding sleeve; 304, double torsion spring; 305, shielding structure;

[0050] 3011, push button scale line; 3031, connection hole; 3032, cavity structure; 3033, tapered transition part;

[0051] 3041, U-shaped pin; 3042, torsion spring coil; 3043, straight pin;

[0052] 3051, slide; 3052, open end; 3053, closed end. DETAILED DESCRIPTION

[0053] The utility model will be further described below in conjunction with the accompanying drawings.

[0054] Example 1

[0055] like Figure 1 As shown, the utility model provides a handle structure of an ablation needle, which is a direct-push handle structure, and the size of the ablation area of ​​the ablation needle is adjusted by pushing.

[0056] Specifically, the handle structure includes a handle housing 1, and a movable adjustment tube 2 is provided at the front end of the handle housing 1. The movable adjustment tube 2 is used to be sleeved on the outside of the needle shaft of the ablation needle. The movable adjustment tube 2 is made of a polyimide (PI) tube or other non-metallic material, so it can play an insulating role. The distance between the proximal end of the movable adjustment tube 2 and the proximal end of the needle shaft is the ablation area corresponding to the ablation needle. By moving the movable adjustment tube 2, the relative position between it and the needle shaft changes, thereby achieving the purpose of adjusting the size of the ablation area.

[0057] like Figure 4a and Figure 4b As shown, the handle housing 1 is constructed as a pistol-shaped structure, and its lower part is convenient for users to hold. The handle housing 1 can be a split structure, for example, it can be formed by buckling a left housing 11 and a right housing 12, so that other components can be installed inside it.

[0058] A sliding propulsion mechanism 3 is provided on the handle housing 1 , and the movable adjustment tube 2 is connected to the sliding propulsion mechanism 3 . The sliding propulsion mechanism 3 can drive the movable adjustment tube 2 to move along its axial direction to change the length of the needle rod covered by the movable adjustment tube 2 .

[0059] Specifically, if Figure 2 As shown, a slide groove 101 is provided on the handle housing 1, and the slide groove 101 can be located, for example, at the middle position of the upper side of the handle housing 1, so that the thumb of the operator can control the sliding propulsion mechanism 3 in the slide groove 101 to move it. Figure 4c As shown, the slide groove 101 can be respectively provided on a portion of the left shell 11 and the right shell 12 , and when the left shell 11 and the right shell 12 are buckled together, a closed slide groove 101 can be formed.

[0060] like Figure 2As shown, the sliding propulsion mechanism 3 passes through the slide groove 101 and is connected to the movable adjustment tube 2 in the handle housing 1 , so the movable adjustment tube 2 can be driven to move along the slide groove 101 by pushing the sliding propulsion mechanism 3 .

[0061] The sliding propulsion mechanism 3 includes a propulsion portion 310. Specifically, Figure 3a , Figure 3b and Figure 3c As shown, the push part 310 includes a push button 301, a shaft neck 302 and a sliding sleeve 303. The axial direction of the sliding sleeve 303 is the moving direction of the push part 310. The sliding sleeve 303 is provided with a cavity structure 3032 on the left and right sides of the axial direction, and a connecting hole 3031 connecting the cavity structures 3032 on the left and right sides of the sliding sleeve 303. The cavity structure 3032 is connected to the connecting hole 3031 through a tapered transition part 3033. The movable adjustment tube 2 passes through the cavity structure 3032 on one side of the sliding sleeve 303 and passes through the connecting hole 3031 from the cavity structure 3032 on the other side of the sliding sleeve 303, thereby connecting to the sliding sleeve 303. The tapered transition part 3033 can play a guiding role when connecting the movable adjustment tube 2. The size of the cavity structure 3032 is much larger than the size of the connecting hole 3031, so it can also play a role in reducing weight.

[0062] A mounting hole is provided at the middle position of the sleeve 303, the neck portion 302 is provided in the mounting hole and extends radially along the sleeve 303, the push button 301 is connected to the end of the neck portion 302, and the push button 301 extends circumferentially along the sleeve 303, so as to apply force on its upper surface to make it move axially along the sleeve 303.

[0063] The push button 301, the neck 302 and the sleeve 303 can be integrally formed, for example, by machining or metal material injection molding, insert injection molding, etc. The neck 302 can be a stainless steel or tungsten steel bar with an outer diameter of 0.5mm-1.5mm and a ground or polished surface.

[0064] The push button 301 and the sliding sleeve 303 are respectively located outside and inside the handle housing 1, and the push button 301 is located above the slide slot 101, so the neck portion 302 is arranged in the slide slot 101, and the push button 301 is pushed, and the neck portion 302 can move in the slide slot 101. When the push button 301 is subjected to a forward or backward force, it drives the neck portion 302 and the sliding sleeve 303, and then drives the movable adjustment tube 2 to move forward or backward, thereby changing the relative position of the movable adjustment tube 2 and the needle rod.

[0065] like Figure 3a As shown, a double torsion spring 304 is also sleeved on the outer surface of the sliding sleeve 303. Figure 3cAs shown, the double torsion spring 304 includes a torsion spring coil 3042, a U-shaped pin 3041 and a straight pin 3043. The U-shaped pin 3041 can connect the two torsion spring coils 3042 on one hand; on the other hand, the U-shaped pin 3041 can cooperate with the shaft neck 302, as shown in FIG. Figure 3a As shown, the journal 302 passes through the U-shaped pin 3041. The straight pins 3043 are respectively located on the sides of the torsion spring coil 3042 and extend along the axial direction of the torsion spring coil 3042.

[0066] The double torsion spring 304 may be formed of medical stainless steel wire, and the diameter of the stainless steel wire forming the torsion spring coil 3042 is 0.3 mm-0.8 mm.

[0067] like Figure 1 , Figure 4a and Figure 7 As shown, the sliding propulsion mechanism 3 further includes a shielding structure 305, which is located in the handle housing 1. The shielding structure 305 is configured to shield the slide groove 101 from the inside of the handle housing 1 and move with the movement of the push portion 310. Specifically, the shielding structure 305 is configured as a shielding sleeve, which is rotatably connected to the handle housing 1, so that when the push portion 310 moves, the shielding structure 305 can rotate synchronously with the push portion 310, so that a portion of the slideway 3051 is always aligned with a portion of the slide groove 101 (such as Figure 4c ), to ensure the normal movement of the push portion 310. The other parts of the slide groove 101 are blocked by the part of the shielding structure 305 where the slideway 3051 is not provided.

[0068] like Figure 7 As shown, a slide 3051 is provided on the shielding structure 305, and the slide 3051 has an open end 3052 and a closed end 3053. The open end 3052 is located at the end of the shielding structure 305, and the slide 3051 is a spiral slide which spirally extends from the open end 3052 to the closed end 3053 along the entire axial direction of the shielding structure 305. The slide 3051 is connected with the interior of the shielding structure 305, so that the shaft neck 302 can enter the slide 3051 through the open end 3052.

[0069] The width of the slideway 3051 may be slightly larger than the diameter of the neck portion 302 to facilitate installation of the neck portion 302 . The width of the slideway 3051 may be, for example, 2 mm to 2.5 mm.

[0070] The sliding sleeve 303 and the double torsion spring 304 on the sliding sleeve 303 are both located in the shielding structure 305, and the neck portion 302 can enter the slideway 3051 from the open end of the slideway 3051. In other words, the neck portion 302 can pass through the slideway 101 of the handle housing 1 and extend into the slideway 3051.

[0071] Therefore, when force is applied to the push button 301 to move it, the neck portion 302 can move along the slide 3051 and cause the shielding structure 305 to rotate accordingly, so that the position of the slide 3051 changes accordingly, so that there is always a part of the slide 3051 aligned with the slide groove 101 to ensure that the movement of the push button 301 will not be hindered.

[0072] The purpose of setting the shielding structure 305 in the handle shell 1 is that the shielding structure 305 can shield the slide groove 101 from the inside of the handle shell 1, and the shielding structure 305 will not affect the movement of the push button 301 in the slide groove 101, so foreign objects will not fall into the slide groove 101 and the handle shell 1, thereby solving the technical problem of jamming caused by foreign objects falling into the slide groove; and the shielding structure 305 shields the slide groove 101, so that the internal structure of the handle shell 1 will not be exposed to the outside, thereby solving the problem of leakage of the internal structure of the ablation needle and improving the aesthetics of the handle shell and the ablation needle.

[0073] Because the shielding structure 305 is located inside the handle housing 1, the handle housing 1 can shield the slideway 3051 of the shielding structure 305, and the shielding structure 305 will shield the slide slot 101. It should be noted that when the push button 301 stays at a certain position on the slide slot 101, a portion of the slideway 3051 is aligned with the position of the slide slot 101 (such as Figure 4c As shown in the figure, that is, the position of the slide slot 101 is not blocked by the shielding structure 305, so as to ensure that the push button 301 can move normally. However, since the push button 301 of the push part 310 is arranged outside the slide slot 101, the push button 301 can simultaneously cover the part where the slide slot 101 and the slideway 3051 are aligned with each other. Therefore, it can be known that the shielding structure 305 and the push button 301 of the push part 310 can jointly play the role of shielding the slide slot 101, thereby avoiding various problems caused by the slide slot 101 being exposed.

[0074] Figure 8 , Fig. 9 and Fig.10 The push button 301 is shown in the initial position, process position and terminal position during the movement of the slide groove 101, from which it can be seen that the shielding structure 305 (and the push button 301 of the pushing part 310) effectively shields the slide groove 101, avoiding the problem of the internal structure of the ablation needle being exposed.

[0075] Furthermore, the pitch of the slideway 3051 should be less than or equal to the maximum stroke of the push part 310 to avoid the problem that the push button 301 cannot cover the slideway 3051 and exposes the slideway 3051 when the push button 301 moves. The stroke of the push part 310 can be 0 mm to 60 mm.

[0076] like Figure 5aAs shown, the two straight pins 3043 of the double torsion spring 304 extend from the slideway 3051 respectively, and engage with the slots inside the handle housing 1, so as to provide torque. Specifically, a pin receiving portion 111 that is recessed in a direction away from the shielding structure 305 is provided on the inner wall of the handle housing 1 (for example, on the inner wall of the left housing 11 and / or the right housing 12), and the pin receiving portion 111 extends along the axial direction of the shielding structure 305. The two straight pins 3043 of the double torsion spring 304 can abut against the side wall of the pin receiving portion 111, so that the pin receiving portion 111 can apply a pre-tightening force to the double torsion spring 304. Figure 1 and Figure 6 As shown, a plurality of locking grooves 103 are further provided in the slide groove 101. When the push button 301 moves to a desired position, it can enter the corresponding locking groove 103 from the slide groove 101, so that the push button 301 is fixed at the current position.

[0077] Specifically, the locking groove 103 is configured in a trumpet shape that opens toward the slide groove 101. The locking groove 103 includes a groove body 1033, a constricted neck portion 1031, and an open portion 1032, wherein the open portion 1032 is connected to the slide groove 101, and its size is larger than that of the constricted neck portion 1031, so that the axial neck portion 302 of the pushing portion 310 can be smoothly inserted into the groove body 1033 from the open portion 1032 via the constricted neck portion 1031; and the constricted neck portion 1031 can block the axial neck portion 302 in the groove body 1033 to prevent it from escaping from the groove body 1033.

[0078] Preferably, if Fig.11 and Fig.12 As shown, each locking groove 103 can be respectively arranged on one side (such as the left side or the right side) of the slide groove 101, and the direction of the opening of the locking groove 103 is opposite to the direction of the opening of the U-shaped pin 3041 (such as Figure 4c shown).

[0079] Please combine Figure 3c In the natural state, the angle between the straight pin 3043 and the U-shaped pin 3041 of the double torsion spring 304 is α1 (e.g. Figure 5c After the double torsion spring 304 is installed, its straight pin 3043 abuts against the side wall of the pin receiving portion 111 (as shown in FIG. Figure 5a As shown), the pin receiving portion 111 applies a preload force to the double torsion spring 304, so that the angle between the straight pin 3043 and the U-shaped pin 3041 becomes α2 (as shown). Figure 5b As shown in FIG. 1 , and α2 is less than α1, that is, the double torsion spring 304 is in a compressed state. Figure 5b and Figure 5cAs shown, the angles α1 and α2 refer to the angles between the line connecting the end of the straight pin 3043 and the center of the sleeve 303 and the line connecting the center of the push button 301 and the center of the sleeve 303 (i.e., the axial direction of the neck portion 302). When the push button 301 moves to the vicinity of the desired locking groove 103, the U-shaped pin 3041 and the straight pin 3043 of the double torsion spring 304 have a tendency to recover from the angle α2 to the angle α1, so the U-shaped pin 3041 can automatically push the push button 301 into the corresponding locking groove 103, thereby fixing the push button 301 in the desired locking groove 103, so as to achieve the semi-automatic locking effect of the sliding propulsion mechanism 3. It can be understood that when the push button 301 is pushed into the corresponding locking groove 103, the angle between the straight pin 3043 and the U-shaped pin 3041 becomes α1, that is, the double torsion spring 304 returns to the natural state. When it is necessary to push the push button 301 again, force can be applied to the push button 301 to make it enter the slide groove 101 from the locking groove 103 through the shaft neck portion 302, and the straight pin 3043 of the double torsion spring 304 will abut against the side wall of the pin receiving portion 111, so that the double torsion spring 304 is in a compressed state again. When the push button 301 is pushed into the next locking groove 103, the above process can be repeated.

[0080] Alternatively, if Fig.13 and Fig.14 As shown, each locking groove 103 can be respectively arranged on both sides of the slide groove 101. Specifically, the locking groove 103 can be as follows Fig.13 As shown in , the size scale (for example, every 5mm unit is a small scale, every 10mm unit is a large scale) is symmetrically distributed on the left and right sides; or it can also be as shown in Fig.14 As shown in , they are staggeredly distributed on both sides of the center line of the handle housing 1. In this optional embodiment, the double torsion spring 304 may not be provided, and the sliding propulsion mechanism 3 can be manually controlled to be clamped into the corresponding locking groove 103.

[0081] The handle housing 1 is also provided with scale lines 102, which correspond to the locking grooves 103. The scale lines are formed by laser etching, silk screen printing or injection molding with the handle housing 1. As mentioned above, a method of a small scale of 5 mm and a large scale of 10 mm can be adopted, or other suitable methods can be adopted.

[0082] In addition, a push button scale line 3011 is provided at the middle position on the surface of the push button 301. When the push button 301 is located in a locking groove 103, the push button scale line 3011 thereon can be aligned with the scale corresponding to the locking groove 103, thereby indicating the travel of the push button 301.

[0083] Example 2

[0084] The difference between the second embodiment and the first embodiment is that the movement mode of the shielding structure 305 is different from that of the first embodiment.

[0085] Specifically, in the second embodiment, the shielding structure 305 is a telescopic sleeve or a telescopic baffle, which can be attached to the push part 310, and the slideway 3051 is an arc-shaped groove extending along the circumference of the shielding structure 305. A part of the shielding structure 305 can be synchronously extended following the movement of the push part 310, and another part can be synchronously contracted following the movement of the push part 310, so that the slideway 3051 between the extended part and the contracted part of the shielding structure 305 is always aligned with a part of the slideway 101 to ensure the normal movement of the push part 310, and the other part of the slideway 101 is blocked by the part of the shielding structure 305 where the slideway 3051 is not provided.

[0086] Example 3

[0087] The utility model also provides an ablation needle, including a needle rod and the handle structure of the ablation needle described in the above embodiments. The needle rod is arranged in the movable adjustment tube 2 and extends into the handle housing 1. When the pushing part 310 drives the movable adjustment tube 2 to move, the distance between the proximal end of the movable adjustment tube 2 and the proximal end of the needle rod can be adjusted, thereby achieving the purpose of adjusting the size of the ablation area of ​​the ablation needle.

[0088] Furthermore, the movable adjustment tube 2 can be adapted to different ablation needles, and its structure can be selected according to the specific functions of the ablation needle. For example, when the movable adjustment tube 2 is adapted to a pulse or radio frequency ablation needle, it is constructed as a needle tube of insulating material or a metal needle tube with an insulating coating. For another example, when the movable adjustment tube 2 is adapted to an ablation needle for cryoablation, it is constructed as an isolation tube (air isolation tube or vacuum isolation tube, etc.).

[0089] It should be noted that the “proximal end” and “proximal side” mentioned in this article refer to the end or side of the needle tip close to the needle shaft, and the “distal end” and “distal side” refer to the end or side of the needle tip away from the needle shaft.

[0090] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A handle structure of an ablation needle, characterized in that: It comprises a handle housing (1) and a movable adjustment tube (2), wherein the handle housing (1) is provided with a slide groove (101) and a sliding propulsion mechanism (3), and the distal end of the movable adjustment tube (2) extends into the handle housing (1); The sliding propulsion mechanism (3) comprises a pushing portion (310) and a shielding structure (305); the pushing portion (310) is connected to the distal end of the movable adjustment tube (2) and is used to drive the movable adjustment tube (2) to move; the shielding structure (305) is located inside the handle housing (1); the shielding structure (305) is configured to shield the slide groove (101) from inside the handle housing (1) and to move following the movement of the pushing portion (310).

2. The handle structure of the ablation needle according to claim 1, characterized in that: The shielding structure (305) is provided with a slideway (3051), and the pushing portion (310) can move in the slide groove (101) and the slideway (3051) at the same time; The shielding structure (305) is rotatably connected to the handle housing (1) so that the shielding structure (305) can rotate synchronously with the pushing portion (310), so that a portion of the slideway (3051) is always aligned with a portion of the slide groove (101).

3. The handle structure of the ablation needle according to claim 2, characterized in that: One end of the slideway (3051) is an open end (3052), and the other end is a closed end (3053); the open end (3052) is located at the end of the shielding structure (305); the slideway (3051) is a spiral slideway that spirally extends from the open end (3052) to the closed end (3053) along the axial direction of the shielding structure (305); The pushing portion (310) can enter the slideway (3051) from the open end (3052).

4. The handle structure of the ablation needle according to claim 3, characterized in that: The pitch of the slideway (3051) is less than or equal to the maximum stroke of the pushing portion (310).

5. The handle structure of the ablation needle according to any one of claims 2 to 4, characterized in that: The pushing portion (310) comprises: A push button (301) arranged on the outside of the handle housing (1) and located above the slide groove (101); A sliding sleeve (303), which is arranged in the shielding structure (305) and connected to the distal end of the movable regulating tube (2); and A shaft neck portion (302) is respectively connected to the push button (301) and the sliding sleeve (303) and extends radially along the sliding sleeve (303). The shaft neck portion (302) passes through the slideway (3051) and the slide groove (101).

6. The handle structure of the ablation needle according to claim 5, characterized in that: A double torsion spring (304) is also sleeved on the outer surface of the sliding sleeve (303), and the double torsion spring (304) comprises a torsion spring coil (3042), a U-shaped pin (3041) and a plurality of straight pins (3043). The torsion spring coil (3042) is sleeved on the sliding sleeve (303), the U-shaped pin (3041) is connected to the torsion spring coil (3042) and is used to cooperate with the shaft neck (302), and the plurality of straight pins (3043) are respectively located on the side of the torsion spring coil (3042) and are used to abut against the inner wall of the handle housing (1).

7. The handle structure of the ablation needle according to claim 6, characterized in that: The inner wall of the handle housing (1) is provided with a pin receiving portion (111) which is recessed in a direction away from the shielding structure (305); the pin receiving portion (111) extends axially along the shielding structure (305); and a plurality of straight pins (3043) are respectively arranged in the pin receiving portion (111).

8. The handle structure of the ablation needle according to claim 5, characterized in that: A plurality of locking grooves (103) are arranged on one or both sides of the slide groove (101), and the locking grooves (103) are arranged at intervals in the moving direction of the pushing portion (310), and each of the locking grooves (103) is connected to the slide groove (101); The locking groove (103) is configured to allow the shaft neck portion (302) to enter the locking groove (103) from the sliding groove (101) and to prevent the shaft neck portion (302) from sliding out of the locking groove (103).

9. The handle structure of the ablation needle according to claim 8, characterized in that: The locking groove (103) comprises a groove body (1033), a neck portion (1031) and an open portion (1032); the groove body (1033) is configured to be recessed in a direction away from the slide groove (101); the size of the open portion (1032) is larger than the size of the neck portion (1031); and the groove body (1033) is connected to the slide groove (101) via the open portion (1032).

10. An ablation needle, characterized in that: The handle structure of the ablation needle includes any one of claims 1-9, and also includes a needle rod, wherein the needle rod is arranged in the movable adjustment tube (2) and extends into the handle housing (1), and when the pushing portion (310) drives the movable adjustment tube (2) to move, the distance between the proximal end of the movable adjustment tube (2) and the proximal end of the needle rod can be adjusted.

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