Handle of an ablation needle

Abstract

The application provides a handle of an ablation needle, and relates to the technical field of ablation. The handle is provided with a transmission mechanism, which comprises a working end adjusting mechanism for adjusting the exposed length of the working end of a main needle, a sub-needle unfolding and retracting mechanism for unfolding or retracting a sub-needle, and an option adjusting mechanism which is switchably connected with the working end adjusting mechanism or the sub-needle unfolding and retracting mechanism. The option adjusting mechanism comprises a rotary driving part comprising a first rotating shaft located in the interior of the handle and a first rotating handle connected with the first rotating shaft and located on the upper portion of the exterior of the handle, and a pushing part comprising an option push button located on the lateral portion of the handle and connected with the first rotating shaft on the side portion of the first rotating shaft. The option push button is provided with a locking part close to one side of the handle, the locking part can lock the option push button on the lateral portion of the handle, so that the option push button moves along the axial direction of the first rotating shaft when being pushed, thereby switching between the first gear, the intermediate gear and the second gear.

Description

[0001] This application is a divisional application of Chinese Patent CN202510879876.6, filed on June 27, 2025, entitled "Transmission Mechanism and Ablation Needle of Ablation Needle". Technical Field

[0002] This invention relates to the field of ablation technology, and particularly to a handle for an ablation needle. Background Technology

[0003] To adapt to complex lesions or variable environments, the exposed length of the working end of the ablation needle and the size of the deployed needle must be adjustable to accommodate different lesion characteristics, locations, shapes, and sizes. Current ablation needles typically have separate drive mechanisms for the working end and the deployed needle. The operator operates each mechanism individually to achieve adjustable exposure length and deployed size. However, because the operator needs to apply force to each drive mechanism separately, hand positions are required to contact different mechanisms, leading to inconvenience. Summary of the Invention

[0004] The present invention provides a transmission mechanism for an ablation needle and an ablation needle, which are used to solve at least one of the above-mentioned technical problems.

[0005] This invention provides a handle for an ablation needle, the ablation needle comprising a main needle and a sub-needle, the handle for accommodating the proximal portion of the main needle and the proximal portion of the sub-needle, and the handle comprising a transmission mechanism, the transmission mechanism comprising:

[0006] A working end adjustment mechanism is used to adjust the exposed length of the working end of the main needle;

[0007] A needle deployment and retraction mechanism for deploying or retracting the needle; and

[0008] Option adjustment mechanism, which can be switched to be linked with the working end adjustment mechanism or the sub-needle extension and retraction mechanism;

[0009] The option adjustment mechanism includes:

[0010] A rotary drive unit includes a first rotating shaft located inside the handle and a first rotating handle connected to the first rotating shaft, the first rotating handle being located externally above the handle; and

[0011] The push part includes an option push button located on the outer side of the handle and connected to the first rotating shaft on the side of the first rotating shaft;

[0012] The option push button has a locking part on the side near the handle. The locking part can lock the option push button to the outside of the handle, so that the option push button can move along the axial direction of the first rotating shaft when it is pushed, thereby switching between the first gear, the intermediate gear and the second gear.

[0013] In one embodiment, a locking groove is provided on the side of the option push button near the handle. The locking groove extends in a direction perpendicular to the moving direction of the option push button. A baffle is provided in the locking groove, and the end face of the baffle is flush with the outer wall of the option push button on the side near the handle.

[0014] The locking part includes:

[0015] A locking pin, one end of which is located in the locking groove, and the other end which is arc-shaped and extends through the stop plate to the outside of the locking groove; and

[0016] A spring is sleeved on the locking pin, with its two ends abutting against the inner wall of the locking groove and the stop plate, respectively. Under the action of the spring, the arc-shaped end of the locking pin abuts against the side wall of the handle.

[0017] In one embodiment, the handle includes a first housing and a second housing disposed opposite to each other, with the first handle located above and outside the first housing;

[0018] The first rotating shaft extends along the direction from the first housing to the second housing, with one end extending into a rotating groove on the bottom wall of the second housing and rotatably connected to the rotating groove, and the other end extending to the outside of the first housing to connect with the first handle.

[0019] In one embodiment, the working end adjustment mechanism includes a first gear and a first rack that mesh with each other, the first rack being connected to an insulating tube outside the main needle; the sub-needle extension and retraction mechanism includes a second gear and a second rack that mesh with each other, the second rack being connected to the sub-needle.

[0020] The second gear is located below the first gear, and both are connected to the first rotating shaft;

[0021] The first rack extends parallel to the second rack, and a support portion is provided between them. The support portion is located between the proximal sidewalls of the second housing and the first housing and the distal sidewalls of the two.

[0022] In one embodiment, the second rack is provided with an insulating tube connecting part, and the insulating tube connecting part is provided with a first slot for connecting the insulating tube;

[0023] The first rack is provided with a sub-needle connecting part, and the sub-needle connecting part is provided with a second slot for connecting the proximal end of the sub-needle;

[0024] The first card slot and the second card slot have opposite slotting directions.

[0025] In one embodiment, the first housing is provided with a first window and a second window spaced apart in the extension direction of the main needle;

[0026] A first pointer is provided on one side of the insulating tube connection portion. The first pointer extends into the first window and can move within the first window to indicate the position of the insulating tube.

[0027] A second pointer is provided on one side of the sub-needle connector. The second pointer extends into the second window and can move within the second window to indicate the size of the sub-needle.

[0028] In one embodiment, the second housing and the first housing are further provided with a mounting portion, which is constructed as a columnar groove structure. The mounting portion protrudes outward from the outer surface of the second housing and the first housing to form an internal space. The first gear, the second gear, and the first rotating shaft are located in the internal space of the mounting portion. The option push button is located on the outer side of the mounting portion, and the first handle is located on the upper outer side of the mounting portion.

[0029] In one embodiment, the first rotating shaft includes a connecting shaft connected to the first handle, an intermediate shaft connected to the connecting shaft, and a first gear shaft and a second gear shaft located on both sides of the intermediate shaft, with the first gear and the second gear respectively passing through the first gear shaft and the second gear shaft.

[0030] A shaft groove is provided between the connecting shaft and the first gear shaft, and a retaining spring is provided in the shaft groove. The retaining spring is pressed against the end face of the first gear to limit the axial position of the first gear.

[0031] A retaining ring is provided on the second gear shaft to limit the axial position of the second gear.

[0032] In one embodiment, the first gear has a first mating part at one end facing the second gear, and the second gear has a second mating part at one end facing the first gear; both are constructed as splines or mating teeth.

[0033] The option adjustment mechanism also includes a linkage part, and a third mating part is provided on the inner wall of the linkage part. The third mating part is constructed as a spline groove or an internal tooth groove, and is respectively meshed with the first mating part and the second mating part.

[0034] In one embodiment, the linkage includes a synchronous adjusting wheel sleeved on a first rotating shaft, with an upper flange and a lower flange respectively provided at both ends of the synchronous adjusting wheel, and an arc-shaped groove formed between the upper flange and the lower flange.

[0035] The pushing part further includes a push rod and an arc-shaped plate; the push rod extends in a direction perpendicular to the moving direction of the option push button, one end of which passes through the outer side wall of the second housing and the first housing and is connected to the arc-shaped plate, and the other end of which is connected to the option push button.

[0036] The arc-shaped plate is disposed in the arc-shaped groove and can move around the first rotating axis in the arc-shaped groove.

[0037] Compared with the prior art, the advantages of the present invention are that the option adjustment mechanism can be linked with the working end adjustment mechanism or the sub-needle extension and retraction mechanism respectively, so that the operator can drive the working end adjustment mechanism and the sub-needle extension and retraction mechanism by operating only the single component of the option adjustment mechanism. That is, the two functions of driving the movement of the insulating tube and driving the extension of the sub-needle can be achieved by a single force application component, without the need to set different force application components for the movement of the insulating tube and the extension of the sub-needle. Therefore, the operation is simpler and more convenient, and the structure of the ablation needle with multiple functions can be made more compact. Attached Figure Description

[0038] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0039] Figure 1A This is a front view of the ablation needle in Embodiment 1 of the present invention;

[0040] Figure 1B This is a bottom view of the ablation needle in Embodiment 1 of the present invention;

[0041] Figure 2A yes Figure 1B A magnified view at point L;

[0042] Figure 2B This is a three-dimensional structural schematic diagram of the transmission mechanism of the ablation needle in Embodiment 1 of the present invention;

[0043] Figure 2C yes Figure 2B A magnified view at point K;

[0044] Figure 2D This is a three-dimensional structural schematic diagram of the option adjustment mechanism in Embodiment 1 of the present invention;

[0045] Figure 2E This is a three-dimensional structural schematic diagram of the option adjustment mechanism in Embodiment 1 of the present invention, showing the state when the push part is in the middle position;

[0046] Figure 2F This is a three-dimensional structural schematic diagram of the option adjustment mechanism in Embodiment 1 of the present invention, showing the state when the push part is in the middle position, and the push part is hidden;

[0047] Figure 2G This is a three-dimensional structural schematic diagram of the option adjustment mechanism in Embodiment 1 of the present invention, showing the state when the push part is in the first position;

[0048] Figure 2H This is a three-dimensional structural schematic diagram of the option adjustment mechanism in Embodiment 1 of the present invention, showing the state when the push part is in the second position.

[0049] Figure 2I This is a three-dimensional structural diagram of the pushing part and the linkage part in Embodiment 1 of the present invention;

[0050] Figure 2J This is a three-dimensional structural diagram of the pushing part in Embodiment 1 of the present invention;

[0051] Figure 2K This is a cross-sectional view of the pushing part in Embodiment 1 of the present invention;

[0052] Figure 2L This is a three-dimensional structural diagram of the linkage part in Embodiment 1 of the present invention;

[0053] Figure 2M This is a three-dimensional structural schematic diagram of the first gear in Embodiment 1 of the present invention;

[0054] Figure 2N This is a three-dimensional structural schematic diagram of the second gear in Embodiment 1 of the present invention;

[0055] Figure 2O This is a three-dimensional structural diagram of the first rotating shaft in Embodiment 1 of the present invention;

[0056] Figure 2P This is a three-dimensional structural schematic diagram of the working end adjustment mechanism in Embodiment 1 of the present invention;

[0057] Figure 2Q This is a three-dimensional structural diagram of the needle deployment and retraction mechanism in Embodiment 1 of the present invention;

[0058] Figure 2R This is a cross-sectional view of the option adjustment mechanism in Embodiment 1 of the present invention;

[0059] Figure 2S This is a three-dimensional structural schematic diagram of the transmission mechanism of the ablation needle in Embodiment 1 of the present invention, which shows the opening and closing mechanism of the sub-needle extension outlet;

[0060] Figure 2TThis is a three-dimensional structural schematic diagram of the transmission mechanism in Embodiment 1 of the present invention, showing the support portion between the working end adjustment mechanism and the needle extension and retraction mechanism;

[0061] Figure 2U This is an axial sectional view of the ablation needle in Embodiment 1 of the present invention, showing the option adjustment mechanism installed in the handle;

[0062] Figure 2V This is a three-dimensional structural diagram of the handle of the ablation needle in Embodiment 1 of the present invention;

[0063] Figure 2W This is a radial sectional view of the handle of the ablation needle in Embodiment 1 of the present invention;

[0064] Figure 3 This is a front view of the ablation needle in Embodiment 2 of the present invention, showing the state when the working end is at its minimum;

[0065] Figure 4 This is a front view of the ablation needle in Embodiment 2 of the present invention, showing the state when the working end is at its maximum;

[0066] Figure 5 This is a front view of the ablation needle in Embodiment 2 of the present invention, showing the state of the sub-needle when it is extended;

[0067] Figure 6 This is an exploded view of the ablation needle in Embodiment 2 of the present invention;

[0068] Figure 7 This is a schematic diagram of the handle of the ablation needle in Embodiment 2 of the present invention;

[0069] Figure 8 This is a front view of the needle-exit opening and closing mechanism in Embodiment 2 of the present invention;

[0070] Figure 9 yes Figure 8 A magnified view at point C;

[0071] Figure 10 This is a three-dimensional structural schematic diagram of the first working end adjustment mechanism in Embodiment 2 of the present invention;

[0072] Figure 11 yes Figure 10 Enlarged view at point D;

[0073] Figure 12 This is a schematic diagram of the ablation needle in Embodiment 3 of the present invention;

[0074] Figure 13 yes Figure 11 Enlarged view at point E;

[0075] Figure 14This is a three-dimensional structural schematic diagram of the second working end adjustment mechanism in Embodiment 3 of the present invention;

[0076] Figure 15 yes Figure 14 Enlarged view at point F;

[0077] Figure 16 This is a three-dimensional structural schematic diagram of the third working end adjustment mechanism in Embodiment 4 of the present invention;

[0078] Figure 17 This is a three-dimensional structural diagram of the first sub-needle deployment and retraction mechanism in Embodiment 2 of the present invention;

[0079] Figure 18 This is a three-dimensional structural diagram of the second sub-needle deployment and retraction mechanism in Embodiment 3 of the present invention;

[0080] Figure 19 This is a three-dimensional structural diagram of the third sub-needle deployment and retraction mechanism in Embodiment 4 of the present invention;

[0081] Figure 20 This is a three-dimensional structural schematic diagram of the fourth sub-needle deployment and retraction mechanism in Embodiment 5 of the present invention;

[0082] Figure 21 yes Figure 20 A magnified view at point G;

[0083] Figure 22 This is a cross-sectional view of the first shielding plate in Embodiment 2 of the present invention;

[0084] Figure 23 This is a top view of the first shielding plate in Embodiment 2 of the present invention;

[0085] Figure 24 This is a schematic diagram of the structure of the second shielding plate in Embodiment 2 of the present invention;

[0086] Figure 25 This is a cross-sectional view of the second shielding plate in Embodiment 2 of the present invention;

[0087] Figure 26 This is a bottom view of the ablation needle in Embodiment 6 of the present invention;

[0088] Figure 27 yes Figure 26 A magnified view at point H;

[0089] Figure 28 This is a three-dimensional structural schematic diagram of the fourth working end adjustment mechanism in Embodiment 6 of the present invention;

[0090] Figure 29 This is a front view of the ablation needle in Embodiment 7 of the present invention;

[0091] Figure 30 yes Figure 29 Enlarged view at point J;

[0092] Figure 31 This is a three-dimensional structural schematic diagram of the fifth sub-needle deployment and retraction mechanism in Embodiment 7 of the present invention;

[0093] Figure 32 This is a front view of the ablation needle in Embodiment 8 of the present invention;

[0094] Figure 33 This is a front view of the ablation needle in Embodiment 9 of the present invention;

[0095] Figure 34 This is a front view of the ablation needle in Embodiment 10 of the present invention;

[0096] Figure 35 This is a front view of the ablation needle in Embodiment 11 of the present invention;

[0097] Figure 36 This is a front view of the ablation needle in Embodiment 12 of the present invention;

[0098] Figure 37 This is a front view of the ablation needle in Embodiment 13 of the present invention;

[0099] Figure 38 This is a front view of the ablation needle in Embodiment 14 of the present invention;

[0100] Figure 39 This is a front view of the ablation needle in Embodiment 15 of the present invention;

[0101] Figure 40 This is a front view of the ablation needle in Embodiment 16 of the present invention;

[0102] Figure 41 This is a front view of the ablation needle in Embodiment 17 of the present invention;

[0103] Figure 42 This is a front view of the ablation needle in Embodiment 18 of the present invention;

[0104] Figure 43 This is a front view of the ablation needle in Embodiment 19 of the present invention;

[0105] Figure 44 This is a front view of the ablation needle in Embodiment 20 of the present invention;

[0106] Figure 45 This is a front view of the ablation needle in Embodiment 21 of the present invention;

[0107] Figure label:

[0108] 100. Handle; 201. Insulating tube; 202. Main needle; 203. Outer needle rod; 204. Sub-needle; 3. Injection tube; 4. Water cooling circulation tube; 5. Cable;

[0109] 101. First housing; 105. First viewing window; 106. Second viewing window; 107. First shield; 108. Second shield; 109. Second housing; 1091. Mounting part; 1092. Proximal sidewall; 1093. Distal sidewall; 1094. Rotating groove;

[0110] 102. Sub-needle exhibition outlet opening and closing mechanism;

[0111] 103. First working end adjustment mechanism; 110. Second working end adjustment mechanism; 114. Third working end adjustment mechanism; 115. Fourth working end adjustment mechanism;

[0112] 104. First needle advance and retreat mechanism; 111. Second needle advance and retreat mechanism; 112. Third needle advance and retreat mechanism; 113. Fourth needle advance and retreat mechanism; 117. Fifth needle advance and retreat mechanism;

[0113] 116. First display screen; 118. Second display screen;

[0114] 119. Option adjustment mechanism;

[0115] 11900, Rotary drive unit; 1191, First handle; 11910, First shaft; 119100, Anti-rotation groove;

[0116] 11911, Intermediate shaft; 11912, First gear shaft; 11913, Second gear shaft; 11914, Connecting platform; 11915, Intermediate shaft spline; 11916, Connecting shaft; 11917, Shaft groove;

[0117] 11920, Support section;

[0118] 11970, Linkage Unit; 1197, Synchronous Adjustment Wheel; 11971, Third Mating Unit; 11972, Upper Flange; 11973, Lower Flange; 11974, Arc-shaped Groove;

[0119] 11902, Pushing part; 1194, First retaining ring; 1196, Option push button; 11903, Push rod; 11904, Arc plate; 11961, Locking groove; 11962, Baffle plate;

[0120] 11905, Locking part; 119051, Locking pin; 119052, Spring;

[0121] 1192, First rack; 11921, Insulating tube connection; 11922, First slot;

[0122] 1195. First gear; 11951. First mating part;

[0123] 1193, Second rack; 11931, Sub-needle connecting part; 11932, Second slot;

[0124] 1190, Second gear; 11901, Second mating part;

[0125] 1198. Second pointer; 1199. First pointer;

[0126] 1011, First window; 1012, First scale line; 1013, First slot; 1014, First marking layer;

[0127] 1015, Second groove; 1016, Second marking layer; 1017, Shaft hole; 1018, Third marking layer;

[0128] 1019, Second window; 10110, Second scale line;

[0129] 1021. First dial wheel; 1022. First lead screw; 1023. Sealing gasket; 1024. Sealing ring; 1025. Injection bend;

[0130] 1031, Second dial; 1032, Second lead screw; 10321, First indicator line; 10322, First through hole;

[0131] 1041. Second handle; 1042. Third rack; 1043. Third gear; 1044. First spacer; 1045. Second snap ring; 1046. Third pointer; 1047. Second pivot;

[0132] 1101, First push button; 1102, Resilient positioning pin; 11011, Second indicator line; 11012, Second through hole; 11021, Positioning groove;

[0133] 1111, Fourth rack; 1112, Second push button; 1113, Connecting rod; 1114, Set screw; 1115, Fourth pointer; 1116, Fourth gear; 1117, Third handle;

[0134] 1121. Third dial; 1122. Third lead screw; 1123. Fifth pointer;

[0135] 1131, Third push button; 11311, Third indicator line;

[0136] 1141. Third handle; 1142. Fifth rack; 1143. Third snap ring; 1144. Sixth pointer; 1145. Third spacer; 1146. Fifth gear; 1147. Third shaft;

[0137] 1151. Fourth dial; 1152. Fourth lead screw; 1153. First distance sensor; 1154. Reflector;

[0138] 1171. Fifth dial; 1172. Fifth lead screw; 1173. Second distance sensor; 1174. Response plate. Detailed Implementation

[0139] The invention will now be further described with reference to the accompanying drawings.

[0140] Example 1

[0141] like Figure 1A , Figure 1B as well as Figures 2A-2W As shown, this invention provides a transmission mechanism for an ablation needle. On one hand, it can adjust the exposed length of the working end of the main needle of the ablation needle, thereby changing the size (area) of the area where heat exchange occurs on the main needle, thus adapting to ablation treatment of different lesion sizes. On the other hand, it can control the extension or retraction of the sub-needle of the ablation needle and adjust the size of the extended sub-needle, thus adapting to ablation treatment of different lesion areas and locations. Therefore, by controlling the change of the working end of the main needle and controlling the extension of the sub-needle through the transmission mechanism, the specifications and types of ablation needles can be greatly simplified. For manufacturers, this simplifies products and facilitates maintenance and management. For users, it eliminates the need to select and use multiple specifications or types of ablation needles based on lesion size, shape, and location, thus simplifying the procurement process and improving ease of use. For patients, complex ablation procedures can be completed with a single puncture, thereby reducing the number of punctures, lowering surgical costs, shortening surgical time, and reducing the risk of surgical infection recurrence.

[0142] The transmission mechanism of the present invention is applied to an ablation needle. The ablation needle of the present invention includes a handle 100, an insulating tube 201, a main needle 202, an outer needle rod 203, a sub-needle 204, an injection tube 3, a water-cooled circulation tube 4, and a cable 5.

[0143] The proximal portion of the main needle 202 is located within the handle 100, while the distal portion is located outside the handle 100. The main needle 202 has a double-layer structure, with its inlet layer and return layer connected to the water-cooling circulation pipe 4. The cooling fluid in the water-cooling circulation pipe 4 enters the main needle 202 through the inlet layer to cool it, and the cooling fluid can return from the return layer to the water-cooling circulation pipe 4 to circulate and cool the main needle 202.

[0144] The main needle 202 has a needle tip with a triangular tip structure and a main needle injection port. The inside of the main needle 202 is hollow. The main needle 202 is in fluid communication with the injection tube 3, so that physiological saline, anesthetic, alcohol and other agents can be injected into the main needle 202 through the main needle injection tube 3 and enter the ablation area through the main needle injection port to expand the ablation range or provide corresponding functions according to clinical needs.

[0145] The outer needle rod 203 is sleeved on the outside of the main needle 202. The outer surface of the outer needle rod 203 is coated to form a treatment area (i.e., the working end). There is a gap between the distal end of the outer needle rod 203 (i.e. the end near the tip of the main needle) and the tip of the main needle, which forms the sub-needle ablation port.

[0146] The sub-needle 204 is located between the outer needle bar 203 and the main needle 202, and is arranged circumferentially around the main needle 202. Therefore, when the sub-needle 204 is pushed to move along its axial direction, the sub-needle 204 can be extended or retracted through the sub-needle extension outlet.

[0147] The outer needle rod 203 or the main needle 202 is connected to the needle unfolding outlet opening and closing mechanism 102 in the handle 100. The needle unfolding outlet opening and closing mechanism 102 can drive the outer needle rod 203 to move linearly along its axis relative to the main needle 202 or the main needle 202 relative to the outer needle rod 203, thereby changing the gap between the distal end of the outer needle rod 203 and the tip of the main needle, so that the degree of opening of the needle unfolding outlet can be varied. For example, when the distal end of the outer needle rod 203 is in contact with the tip of the main needle, that is, the gap between the two is 0, the needle unfolding outlet is closed, so that the needle 204 cannot be unfolded from it; when the gap between the distal end of the outer needle rod 203 and the tip of the main needle is at its maximum, the degree of opening of the needle unfolding outlet is at its maximum, so that the needle 204 can be unfolded from the needle unfolding outlet to the maximum extent (or size).

[0148] The needle outlet opening and closing mechanism 102 is designed to drive the outer needle bar 203 to move axially relative to the main needle 202, and therefore may include one or more of the following: a rack and pinion mechanism, a ball screw mechanism, a linear slide block mechanism, a crank-slider mechanism, and a worm gear mechanism. For example, the ball screw structure described in Embodiment 2 below. Figure 2S As shown, the sub-needle outlet opening and closing mechanism 102 is constructed as a ball screw structure, wherein the screw is connected to the outer needle rod 203, thereby driving the outer needle rod 203 to move to open or close the sub-needle outlet.

[0149] The outer needle rod 203 is also equipped with scale lines to mark the puncture depth and the length of the working end.

[0150] Sub-needle 204 is connected to the first sub-needle unfolding and retracting mechanism 104 inside the handle 100.

[0151] An insulating tube 201 is fitted over the outer side of the outer needle rod 203. The insulating tube 201 is made of heat-insulating material; therefore, it is understandable that the portion of the outer needle rod 203 covered by the insulating tube 201 does not have heat exchange capabilities, and the portion exposed outside the insulating tube 201 forms the treatment area. Therefore, by moving the insulating tube 201, the size of the portion of the outer needle rod 203 exposed outside the insulating tube 201 can be changed, thereby altering the exposed length of the working end.

[0152] Furthermore, the transmission mechanism of the ablation needle is housed in the handle 100, and the transmission mechanism of the ablation needle includes a working end adjustment mechanism and a sub-needle extension and retraction mechanism.

[0153] The working end adjustment mechanism is connected to the far end of the insulating tube 201 (i.e. the end away from the tip of the main needle), which can drive the insulating tube 201 to move linearly along its axis, thereby changing the size of the part of the outer needle rod 203 exposed outside the insulating tube 201, and thus changing the exposed length of the working end.

[0154] The working end adjustment mechanism is designed to drive the insulating tube 201 to move axially relative to the outer needle rod 203. It includes one or more of the following: a gear and rack mechanism, a ball screw mechanism, a linear slide rail slider mechanism, a crank slider mechanism, and a worm gear mechanism. For example, the working end adjustment mechanism may include a composite mechanism of a gear and rack mechanism and a linear slide rail slider mechanism.

[0155] Optionally, the working end adjustment mechanism can be the first working end adjustment mechanism 103 described in Embodiment 2 below, which is constructed as a ball screw mechanism.

[0156] Optionally, the working end adjustment mechanism can be the second working end adjustment mechanism 110 as described in Embodiment 3 below, which is constructed as a linear slide rail slider mechanism.

[0157] Optionally, the working end adjustment mechanism can be the third working end adjustment mechanism 114 as described in Embodiment 4 below, which is constructed as a gear and rack mechanism.

[0158] Optionally, the working end adjustment mechanism can be the fourth working end adjustment mechanism 115 as described in Embodiment 6 below, which is constructed as a ball screw mechanism.

[0159] The needle deployment and retraction mechanism is connected to the needle 204 and is used to drive the needle 204 to deploy or retract from the needle deployment outlet.

[0160] The sub-needle extension and retraction mechanism is designed to drive the sub-needle 204 to move axially relative to the main needle 202. It includes one or more of the following: a gear and rack mechanism, a ball screw mechanism, a linear slide rail slider mechanism, a crank slider mechanism, and a worm gear mechanism. For example, the working end adjustment mechanism may include a combination of a gear and rack mechanism and a linear slide rail slider mechanism.

[0161] Optionally, the sub-needle deployment and retraction mechanism can be the first sub-needle deployment and retraction mechanism 104 described in Embodiment 2 below, which is constructed as a gear and rack mechanism.

[0162] Optionally, the sub-needle deployment and retraction mechanism can be the second sub-needle deployment and retraction mechanism 111 described in Embodiment 3 below, which is constructed as a combined mechanism of gear rack and linear slide rail slider.

[0163] Optionally, the sub-needle deployment and retraction mechanism can be the third sub-needle deployment and retraction mechanism 112 described in Embodiment 4 below, which is constructed as a ball screw mechanism.

[0164] Optionally, the sub-needle deployment and retraction mechanism can be the fourth sub-needle deployment and retraction mechanism 113 as described in Embodiment 5 below, which is constructed as a linear slide rail slider mechanism.

[0165] Optionally, the sub-needle deployment and retraction mechanism can be the fifth sub-needle deployment and retraction mechanism 117 described in Embodiment 7 below, which is constructed as a ball screw structure.

[0166] In Embodiment 1 of the present invention, as Figure 2A , Figure 2B and Figure 2C As shown, an option adjustment mechanism 119 is also provided, which can be switched with the above-mentioned working end adjustment mechanism and the sub-needle extension and retraction mechanism to form a first position and a second position.

[0167] When switched to the first gear, the option adjustment mechanism 119 is linked with the working end adjustment mechanism, which enables the working end adjustment mechanism to drive the insulating tube 201 to move along its axial direction.

[0168] When switched to the second position, the option adjustment mechanism 119 is linked with the needle deployment and retraction mechanism, which enables the needle deployment and retraction mechanism to drive the needle 204 to deploy or retract.

[0169] In other words, by providing an option adjustment mechanism 119 that can be linked with the working end adjustment mechanism or the sub-needle extension and retraction mechanism at different settings, the present invention allows the operator to drive the working end adjustment mechanism and the sub-needle extension and retraction mechanism by operating only the single component of the option adjustment mechanism 119. This enables the operation of both the movement of the insulating tube 201 and the extension of the sub-needle 204 to be achieved by a single force-applying component, without the need to set different force-applying components for the movement of the insulating tube 201 and the extension of the sub-needle 204. This makes the structure of the multi-functional ablation needle more compact and easier to operate.

[0170] like Figure 2D As shown, the option adjustment mechanism 119 includes a rotary drive unit 11900, a linkage unit 11970, and a push unit 11902.

[0171] Among them, the propulsion unit 11902 can be in the first gear (such as...) Figure 2G (as shown) and second gear (as shown) Figure 2H The mechanism switches between the push unit 11902 and the working end adjustment mechanism. When the push unit 11902 is in the first position, the linkage unit 11970 connects the rotary drive unit 11900 and the working end adjustment mechanism, so that the rotary drive unit 11900 is linked with the working end adjustment mechanism. When the push unit 11902 is in the second position, the linkage unit 11970 connects the rotary drive unit 11900 and the sub-needle unfolding and retracting mechanism, so that the rotary drive unit 11900 is linked with the sub-needle unfolding and retracting mechanism.

[0172] The following uses the working end adjustment mechanism as a gear and rack mechanism and the sub-needle extension and retraction mechanism as an example to illustrate the linkage principle of the option adjustment mechanism 119. It can be understood that the working end adjustment mechanism and the sub-needle extension and retraction mechanism can also be other mechanisms as described in the embodiments below.

[0173] Please combine Figure 2M and Figure 2P The working end adjustment mechanism includes a first gear and rack mechanism, which includes a first gear 1195 and a first rack 1192 meshing with the first gear 1195, such as... Figure 2B As shown, the first rack 1192 is fixedly connected to the insulating tube 201.

[0174] Please combine Figure 2N and Figure 2Q The needle deployment and retraction mechanism includes a second gear and rack mechanism, which includes a second gear 1190 and a second rack 1193 meshing with the second gear 1190, such as... Figure 2B As shown, the second rack 1193 is fixedly connected to the sub-needle 204 (proximal end).

[0175] like Figure 2B and Figure 2C As shown, the second gear 1190 is located below the first gear 1195, and the two are coaxially arranged. The first rack 1192 and the second rack 1193 extend parallel to each other, and both extend along the axial direction of the insulating tube 201.

[0176] Please continue reading Figure 2D The rotary drive unit 11900 includes a first handle 1191 and a first rotating shaft 11910 connected to the first handle 1191. The first handle 1191 is located outside the handle 100 for easy operation by the operator. The first rotating shaft 11910 passes through a first gear 1195 and a second gear 1190 in sequence.

[0177] like Figure 2O and Figure 2RAs shown, the first rotating shaft 11910 includes a connecting shaft 11916 connected to the first handle 1191, an intermediate shaft 11911 connected to the connecting shaft 11916, and a first gear shaft 11912 and a second gear shaft 11913 located on both sides of the intermediate shaft 11911. Please refer to... Figure 2F The first gear 1195 and the second gear 1190 are respectively mounted on the first gear shaft 11912 and the second gear shaft 11913, and the intermediate shaft 11911 is located between the first gear 1195 and the second gear 1190.

[0178] like Figure 2R As shown, and please refer to Figure 2O To prevent relative rotation between the first handle 1191 and the connecting shaft 11916, a connecting platform 11914 is provided on the connecting shaft 11916. Correspondingly, an anti-rotation groove 119100 is provided in the first handle 1191. The inner walls of the connecting platform 11914 and the anti-rotation groove 119100 abut against each other, thereby preventing relative rotation between the first handle 1191 and the connecting shaft 11916 and ensuring that the operator can drive the connecting shaft 11916 to rotate simultaneously when rotating the first handle 1191.

[0179] In addition, such as Figure 2O As shown, a shaft groove 11917 is provided between the connecting shaft 11916 and the first gear shaft 11912. Please refer to... Figure 2D and Figure 2R A first retaining ring 1194 is provided in the shaft groove 11917. The first retaining ring 1194 presses against the end face of the first gear 1195, and its retaining teeth are inserted into the shaft groove 11917, thereby restricting the axial position of the first gear 1195. Correspondingly, a retaining ring (not shown) can also be provided on the second gear shaft 11913 to restrict the axial position of the second gear 1190.

[0180] Please combine Figure 2W The first handle 1191 is mounted on the first housing 101. A rotating groove 1094 is provided on the bottom wall of the second housing 109. The lower end of the second gear shaft 11913 is rotatably connected to the rotating groove 1094. Thus, when the first handle 1191 is rotated, it drives the connecting shaft 11916 (the first rotating shaft 11910) to rotate relative to the second housing 109 and the first housing 101.

[0181] like Figure 2O As shown, an intermediate shaft spline 11915 is provided on the outer wall of the intermediate shaft 11911. Please continue to see... Figure 2D And please combine Figure 2I and Figure 2LThe linkage 11970 includes a synchronous adjusting wheel 1197 sleeved on the first rotating shaft 11910 (intermediate shaft 11911), and the synchronous adjusting wheel 1197 is located between the first gear 1195 and the second gear 1190. A third mating part 11971 is provided on the inner wall of the synchronous adjusting wheel 1197, and the third mating part 11971 can be in the form of a spline groove or an internal gear groove.

[0182] Therefore, as Figure 2E and Figure 2F As shown, the third mating part 11971 of the synchronous adjusting wheel 1197 is mated with the intermediate shaft spline 11915 on the outer wall of the intermediate shaft 11911, so that the synchronous adjusting wheel 1197 and the intermediate shaft 11911 (first rotating shaft 11910) cannot rotate relative to each other. That is, when the first rotating shaft 11910 rotates, it will drive the synchronous adjusting wheel 1197 to rotate.

[0183] like Figure 2M As shown, the first gear 1195 has a first mating part 11951; as Figure 2F As shown, the first mating part 11951 is located at the end of the first gear 1195 facing the second gear 1190, and it can be a spline or mating tooth structure. Figure 2N As shown, the second gear 1190 has a second mating part 11901; as Figure 2F As shown, the second mating part 11901 is located at the end of the second gear 1190 facing the first gear 1195, and it can be a spline or mating tooth structure.

[0184] like Figure 2E and Figure 2G As shown, the pushing unit 11902 can drive the synchronous adjusting wheel 1197 to move along its axis on the intermediate shaft 11911. When the pushing unit 11902 pushes the synchronous adjusting wheel 1197 to move towards the first gear 1195 to the first gear position, the third mating part 11971 on the inner wall of the synchronous adjusting wheel 1197 (as shown) Figure 2L (As shown) simultaneously with the first mating part 11951 on the outer wall of the first gear 1195 (as shown) Figure 2M As shown, the three gears are connected in a coordinated manner. For example, the third mating part 11971 on the inner wall of the synchronous adjusting wheel 1197 is a spline groove, and the first mating part 11951 on the outer wall of the first gear 1195 is a spline. The spline on the outer wall of the first gear 1195 is inserted into the spline groove on the inner wall of the synchronous adjusting wheel 1197. At the same time, as mentioned above, the intermediate shaft spline 11915 on the outer wall of the intermediate shaft 11911 is also inserted into the spline groove of the synchronous adjusting wheel 1197. Thus, the synchronous adjusting wheel 1197 is fixedly connected to both the first gear 1195 and the intermediate shaft 11911 (first rotating shaft 11910), and none of the three can rotate relative to each other.

[0185] Therefore, when the push unit 11902 is in the first gear, the rotary drive unit 11900 can be linked with the working end adjustment mechanism. That is, when the operator rotates the first handle 1191, the first handle 1191 drives the first rotating shaft 11910 to rotate. Since the first rotating shaft 11910 is fixedly connected to the first gear 1195 through the synchronous adjustment wheel 1197, the rotation of the first rotating shaft 11910 can drive the first gear 1195 to rotate, thereby causing the first rack 1192, which meshes with the first gear 1195, to drive the insulating tube 201 to move.

[0186] like Figure 2E and 2H As shown, the pushing unit 11902 can drive the synchronous adjusting wheel 1197 to move along its axis on the intermediate shaft 11911. When the pushing unit 11902 pushes the synchronous adjusting wheel 1197 to move towards the second gear 1190 to the second gear position, the third mating part 11971 on the inner wall of the synchronous adjusting wheel 1197 (as shown) Figure 2L (As shown) simultaneously with the second mating part 11901 on the outer wall of the second gear 1190 (as shown) Figure 2N As shown, the synchronous adjusting wheel 1197 is connected in a splined manner. For example, the third mating part 11971 on the inner wall of the synchronous adjusting wheel 1197 is a spline groove, and the second mating part 11901 on the outer wall of the second gear 1190 is a spline. The spline on the outer wall of the second gear 1190 is inserted into the spline groove on the inner wall of the synchronous adjusting wheel 1197. At the same time, as mentioned above, the intermediate shaft spline 11915 on the outer wall of the intermediate shaft 11911 is also inserted into the spline groove of the synchronous adjusting wheel 1197. Thus, the synchronous adjusting wheel 1197 is fixedly connected to both the second gear 1190 and the intermediate shaft 11911 (first rotating shaft 11910), and none of the three can rotate relative to each other.

[0187] Therefore, when the push unit 11902 is in the second position, the rotary drive unit 11900 can be linked with the needle extension and retraction mechanism. That is, when the operator rotates the first handle 1191, the first handle 1191 drives the first rotating shaft 11910 to rotate. Since the first rotating shaft 11910 is fixedly connected to the second gear 1190 through the synchronous adjustment wheel 1197, the rotation of the first rotating shaft 11910 can drive the second gear 1190 to rotate, thereby causing the second rack 1193, which meshes with the second gear 1190, to drive the needle 204 to move.

[0188] Understandably, when the pusher 11902 is in the first gear position, the first rotating shaft 11910 is fixedly connected to the first gear 1195 via the synchronous adjustment wheel 1197, but not to the second gear 1190. Therefore, when the first rotating shaft 11910 rotates, it will not drive the second gear 1190 to rotate, and the needle 204 will not move. Similarly, when the pusher 11902 is in the second gear position, the first rotating shaft 11910 is fixedly connected to the second gear 1190 via the synchronous adjustment wheel 1197, but not to the first gear 1195. Therefore, when the first rotating shaft 11910 rotates, it will not drive the first gear 1195 to rotate, and the insulating tube 201 will not move.

[0189] Understandably, the width of the spline groove on the inner wall of the synchronizing adjustment wheel 1197 is equal to the sum of the width of the spline on the first gear 1195 (or the second gear 1190) and the width of the spline on the intermediate shaft 11911. Therefore, when the pushing part 11902 pushes the synchronizing adjustment wheel 1197 to the first gear or the second gear, the synchronizing adjustment wheel 1197 can fix the first rotating shaft 11910 to the first gear 1195 or the first rotating shaft 11910 to the second gear 1190.

[0190] Furthermore, the splines or mating teeth on the first gear 1195 are offset from the splines or mating teeth on the second gear 1190, that is, the splines on the first gear 1195 correspond to the gap between the two splines on the second gear 1190.

[0191] Furthermore, such as Figure 2E and Figure 2F As shown, the pusher 11902 and the synchronization adjustment wheel 1197 can also be in the intermediate position, that is, in the middle position of the intermediate shaft 11911. At this time, the synchronization adjustment wheel 1197 is only fixedly connected to the intermediate shaft 11911, and is not fixed to the first gear 1195 or the second gear 1190. Therefore, when the first rotating shaft 11910 rotates, it will not drive the first gear 1195 or the second gear 1190 to rotate. In other words, when the pusher 11902 and the synchronization adjustment wheel 1197 are in the intermediate position, if the operator turns the first handle 1191, the first rotating shaft 11910 will rotate freely and will not drive the first gear 1195 or the second gear 1190 to rotate. Therefore, it can prevent unintended accidental activation during clinical use.

[0192] like Figure 2IAs shown, the pushing part 11902 includes an option push button 1196, a push rod 11903 connected to the option push button 1196, and an arc-shaped plate 11904 connected to the push rod 11903. The synchronous adjustment wheel 1197 has flanges at both ends, namely an upper flange 11972 and a lower flange 11973. An arc-shaped groove 11974 is formed between the upper flange 11972 and the lower flange 11973. The arc-shaped plate 11904 is disposed between the arc-shaped groove 11974 and is rotatably connected to the synchronous adjustment wheel 1197.

[0193] like Figure 2J and Figure 2L As shown, the arc plate 11904 has a shape that matches the arc groove 11974, so the arc plate 11904 and the arc groove 11974 can rotate relative to each other. However, due to the blocking effect of the upper flange 11972 and the lower flange 11973, when the arc plate 11904 moves along the axial direction of the synchronous adjusting wheel 1197, it will drive the synchronous adjusting wheel 1197 to move along its axial direction as well.

[0194] like Figure 2A As shown, the option push button 1196 is located outside the handle 100. More specifically, the option push button 1196 is located on the side of the handle 100. By pushing the option push button 1196 to move along the axial direction of the first rotating shaft 11910, the operator can drive the synchronous adjustment wheel 1197 to move along the axial direction of the first rotating shaft 11910.

[0195] like Figure 2J and Figure 2K As shown, the option push button 1196 is also provided with a locking part 11905, which includes a locking pin 119051 and a spring 119052 sleeved on the locking pin 119051. The option push button 1196 is provided with a locking groove 11961, and a baffle 11962 is also provided in the locking groove 11961. The baffle 11962 abuts against the locking groove 11961, thereby restricting the locking pin 119051 and the spring 119052 in the locking groove 11961.

[0196] Due to the pushing force of the spring 119052, the locking pin 119051 has one end protruding from the outer wall of the option push button 1196 and abutting against the side wall of the handle 100. Therefore, when there is no external force or a small, undesirable external force disturbance, the locking part 11905 can lock the option push button 1196 on the handle 100 and prevent it from moving. Only when the operator pushes the option push button 1196 can it move, thereby switching between the first position, the intermediate position and the second position.

[0197] like Figure 2B and Figure 2PAs shown, the first gear and rack mechanism also includes an insulating tube connection portion 11921 connected to the first rack 1192. The insulating tube connection portion 11921 extends radially along the insulating tube 201 and engages with the insulating tube. Figure 2P As shown, the insulating tube connection 11921 is perpendicular to the first rack 1192, and a first slot 11922 is provided on it. Please refer to... Figure 2B and Figure 2T The insulating tube 201 is engaged, welded, or bonded to the first slot 11922. Therefore, when the first rack 1192 is driven by the first gear 1195 and moves relative to the first gear 1195, it can drive the insulating tube 201 to move linearly along its axis.

[0198] like Figure 2B and Figure 2Q As shown, the second gear rack mechanism also includes a pin connecting part 11931 connected to the second rack 1193. The pin connecting part 11931 is located on the side of the second rack 1193 away from the insulating tube connecting part 11921 and is arranged opposite to the insulating tube connecting part 11921. The pin connecting part 11931 is engaged, welded or bonded to the pin.

[0199] like Figure 2Q As shown, the needle connecting part 11931 is perpendicular to the second rack 1193 and is located on the side opposite to the insulating tube connecting part 11921. A second slot 11932 is provided on it. Please refer to... Figure 2B and Figure 2T The proximal end of the needle 204 passes through the insulating tube 201 and engages with the second slot 11932. Therefore, when the second rack 1193 is driven by the second gear 1190 and moves relative to the second gear 1190, it can drive the needle 204 to move linearly along its axis.

[0200] like Figure 2S and Figure 2T As shown, a support portion 11920 is provided between the first gear and rack mechanism and the second gear and rack mechanism. The support portion 11920 is constructed as a support bar, which is located between the first rack 1192 and the second rack 1193, and abuts against the lower surface of the first rack 1192 and the upper surface of the second rack 1193, thereby supporting the first rack 1192 and the second rack 1193. Figure 2S As shown, one end of the support portion 11920 is aligned with the side of the insulating tube connection portion 11921, as... Figure 2T As shown, the support portion 11920 extends over the second rack 1193 and passes over the needle connector portion 11931.

[0201] Please combine Figure 2U and Figure 2VThe two ends of the support 11920 abut against the proximal sidewall 1092 (i.e. the side away from the main needle tip) and the distal sidewall 1093 (i.e. the side close to the main needle tip) of the second housing 109 (and the first housing 101), respectively, so as to be fixed inside the second housing 109 (and the first housing 101).

[0202] like Figure 2U and Figure 2V As shown, a mounting portion 1091 is also provided on the second housing 109 (and the first housing 101). The mounting portion 1091 is a columnar groove structure that protrudes outward from the outer surface of the second housing 109 (and the first housing 101), thereby forming an internal space to accommodate the option adjustment mechanism 119. Figure 2P As shown, a first pointer 1199 is provided on one side of the insulating tube connection portion 11921, which is used to indicate the position of the insulating tube 201. Please refer to... Figure 2U , Figure 6 and Figure 7 The first housing 101 has a first window 1011, and the first pointer 1199 is located in the first window 1011, so that the movement of the first pointer 1199 can be observed through the first window 1011. The first scale lines 1012 are provided on both sides of the first window 1011. The length of the working end can be marked by the position of the first pointer 1199 on the first scale lines 1012 on both sides of the first window 1011.

[0203] like Figure 2V As shown, a first viewing window 105 is provided on the first housing 101. The first viewing window 105 is made of transparent material and is installed on the first window 1011 (please refer to...). Figure 2U The position of the first pointer 1199 can be observed through the first viewing window 105, thereby obtaining the distance the insulating tube 201 has moved to indicate the exposed length of the working end.

[0204] Or such as Figure 28 As shown, a first ranging sensor 1153 can be installed on the working end adjustment mechanism. The first ranging sensor 1153 can be a laser sensor or an ultrasonic sensor. The energy signal emitted by the first ranging sensor 1153 is reflected by a reflector 1154 inside the handle 100. The control unit of the ablation needle processes the energy signal reflected by the reflector 1154 into a digital signal and transmits it to the first display screen 116 for display. The length of the working end can be displayed on the first display screen 116. Alternatively, the control unit of the ablation needle can transmit the digital signal to the ablation host via cable 5, and the ablation host will display the length of the working end.

[0205] The needle extension and retraction mechanism is equipped with a pointer for indicating the size of the extended needle or a second ranging sensor corresponding to the reaction plate inside the ablation needle.

[0206] like Figure 2Q As shown, a second pointer 1198 is provided on one side of the sub-needle connecting part 11931, which is used to indicate the size of the sub-needle when extended. Please refer to... Figure 2U , Figure 6 and Figure 7 The first housing 101 has a second window 1019 for observing the second pointer 1198. The second pointer 1198 is located in the second window 1019, and its movement can be observed through the second window 1019. Second scale lines 10110 are provided on both sides of the second window 1019. The size of the sub-pointer 204 can be determined by the position of the second pointer 1198 on the second scale lines 10110 on both sides of the second window 1019.

[0207] like Figure 2V As shown, a second viewing window 106 is provided on the first housing 101. The second viewing window 106 is made of transparent material and is installed on the second window 1019 (please refer to...). Figure 2U The position of the second pointer 1198 can be observed through the second window 106, thereby obtaining the distance the sub-needle 204 has moved to indicate the size of the sub-needle 204.

[0208] As described below, a first shield / second shield may also be provided at the corresponding positions of the first window 1011 and the second window 1019 to prevent the internal structure of the handle 100 from being exposed.

[0209] Or such as Figure 30 As shown, a second ranging sensor 1173 can be installed on the working end adjustment mechanism. The second ranging sensor 1173 can be a grating sensor, capacitive grating sensor, magnetic grating sensor, resistance sensor, or capacitance sensor. The energy signal or electrical signal emitted by the second ranging sensor 1173 is fed back to the control unit of the ablation needle through the reaction plate 1174 inside the handle 100. The control unit of the ablation needle processes it into a digital signal and transmits it to the second display screen 118. The second display screen 118 displays the size of the sub-needle 204. Alternatively, the control unit of the ablation needle can transmit the digital signal to the ablation host through the cable 5, and the ablation host displays the size of the sub-needle 204.

[0210] Example 2

[0211] like Figure 3 , Figure 4 and Figure 5 As shown, in Embodiment 2 of the present invention, the working end adjustment mechanism is a first working end adjustment mechanism 103, which controls the insulating tube 201 to move along its axial direction, thereby adjusting the working end. The sub-needle unfolding and retracting mechanism is a first sub-needle unfolding and retracting mechanism 104, which controls the sub-needle 204 to move along its axial direction, thereby adjusting the unfolded size of the sub-needle 204.

[0212] like Figure 6 As shown, the handle 100 includes a first housing 101 and a second housing 109 that are separately configured and interlocked with each other. The handle 100 is equipped with a needle extension outlet opening and closing mechanism 102, a first working end adjustment mechanism 103, a first needle extension and retraction mechanism 104, a first viewing window 105, a second viewing window 106, a first baffle plate 107, and a second baffle plate 108.

[0213] like Figure 6 As shown, the first working end adjustment mechanism 103 is connected to the proximal end of the insulating tube 201, which can drive the insulating tube 201 to move, thereby changing the length of the insulating tube 201 covering the outer needle rod 203, so as to adjust the exposed length of the working end.

[0214] like Figure 10 and Figure 11 As shown, the first working end adjustment mechanism 103 is a ball screw mechanism. Specifically, it includes a second dial wheel 1031 and a second screw 1032 threadedly connected to the second dial wheel 1031. The second dial wheel 1031 is disposed in the first slot 1013 on the first housing 101, and a portion of it is located outside the first slot 1013, thereby facilitating the operator to apply force to it.

[0215] The insulating tube 201 is connected to the second lead screw 1032. By rotating the second dial 1031, the second lead screw 1032 can be driven to move the insulating tube 201 along its axis, thereby realizing the adjustment of the working end.

[0216] like Figure 7 As shown, a first marking layer 1014 is provided on one side of the first slot 1013 to indicate the adjustment direction of the working end size. For example, turning the second dial 1031 in the decreasing direction of the first marking layer 1014 indicates that the exposed length of the working end can be reduced; conversely, turning it in the increasing direction increases the exposed length of the working end.

[0217] like Figure 11 As shown, the second lead screw 1032 is provided with a first indicator line 10321, which is used to indicate the size of the adjustable working end. Figure 7 As shown, the first housing 101 is provided with a first window 1011 for observing the first indicator line 10321. The first window 1011 is provided with first scale lines 1012 on both sides. The length of the working end can be marked by the position of the first indicator line 10321 on the first scale lines 1012 on both sides of the first window 1011.

[0218] like Figure 6As shown, a first viewing window 105 is provided on the first housing 101. The first viewing window 105 is made of transparent material and is installed on the first window 1011. The position of the first indicator line 10321 can be observed through the first viewing window 105, thereby obtaining the distance that the insulating tube 201 has moved, so as to indicate the exposed length of the working end.

[0219] Furthermore, to prevent the internal structure of the handle 100 from being exposed through the first window 1011 of the first housing 101, a first baffle 107 is provided at a corresponding position on the first window 1011 for shielding. For example... Figure 11 As shown, the second lead screw 1032 is provided with a first through hole 10322 for the first baffle plate 107 to pass through. Figure 6 As shown, one end of the first baffle plate 107 is inserted into the first through hole 10322, and the other end is stuck on the inner wall of the first housing 101. When the second lead screw 1032 rotates and moves, the first baffle plate 107 will block the position where the second lead screw 1032 leaves, thereby preventing the internal structure of the first housing 101 from being exposed.

[0220] like Figure 22 and Figure 23 As shown, when the second lead screw 1032 moves to any position, only the first indicator line 10321 and the first shielding plate 107 can be seen through the first window 1011, thus effectively shielding the internal structure of the handle 100.

[0221] like Figure 7 As shown, the first housing 101 is provided with a shaft hole 1017 for mounting the first sub-needle unfolding mechanism 104. A third marking layer 1018 is provided on one side of the shaft hole 1017 to indicate the adjustment direction of the unfolding size of the sub-needle 204.

[0222] like Figure 17 As shown, the first needle deployment and retraction mechanism 104 is a gear and rack mechanism. Specifically, the first needle deployment and retraction mechanism 104 includes a second handle 1041 located outside the handle 100, a second rotating shaft 1047 connected to the second handle 1041, a third gear 1043 sleeved on the second rotating shaft 1047, a third rack 1042 meshing with the third gear 1043, and first spacers 1044 located on both sides of the third gear 1043. A second retaining spring 1045 is also provided on the side of the third gear 1043 near the second handle 1041, and the first spacers 1044 are located between the second retaining spring 1045 and the third gear 1043.

[0223] A sub-needle connecting portion is provided on one side of the third rack 1042, which can have the same structure as the sub-needle connecting portion 11931 described in Embodiment 1 above, and the sub-needle 204 is fixed in the sub-needle connecting portion. A third pointer 1046 is also provided on one side of the sub-needle connecting portion.

[0224] When the second handle 1041 is rotated, it drives the second shaft 1047 to rotate. The second shaft 1047 drives the third gear 1043 to rotate, thereby driving the third rack 1042 to move the sub-needle 204 along its axial direction, thus realizing the extension and retraction of the sub-needle 204.

[0225] When the third rack 1042 moves, the third pointer 1046 on it moves together, thereby indicating the size of the sub-needle 204.

[0226] like Figure 7 As shown, the first housing 101 has a second window 1019 for observing the third pointer 1046. Figure 6 As shown, a second viewing window 106 is provided on the first housing 101. The second viewing window 106 is made of transparent material and is installed on the second window 1019. The position of the third pointer 1046 can be observed through the second viewing window 106, thereby obtaining the distance the sub-needle 204 has moved to indicate the size of the sub-needle 204.

[0227] like Figure 7 As shown, a second scale line 10110 is provided on one side of the second window 1019. By determining the position of the third pointer 1046 on the second scale line 10110, the size of the sub-needle 204 can be calibrated.

[0228] like Figure 24 and Figure 25 As shown, to prevent the internal structure of the handle 100 from being exposed through the second window 1019 on the first housing 101, a second baffle 108 is provided at the corresponding position of the second window 1019, and the second baffle 108 is fixed to the inner wall of the first housing 101. When the third pointer 1046 moves to any position, only the third pointer 1046 and the second baffle 108 can be seen through the second window 1019, thus effectively concealing the internal structure of the handle 100.

[0229] like Figure 7 As shown, the first housing 101 is provided with a second slot 1015 for installing the needle outlet opening and closing mechanism 102, such as... Figure 3 As shown, the needle extension outlet opening and closing mechanism 102 opens the needle extension outlet, and the first needle extension and retraction mechanism 104 controls the extension of the needle 204.

[0230] like Figure 8 and Figure 9 As shown, the needle outlet opening and closing mechanism 102 is a ball screw structure, which includes a first dial wheel 1021 and a first screw 1022 that is threadedly connected to the first dial wheel 1021. The first dial wheel 1021 is located in the second slot 1015, and a part of it is located outside the second slot 1015 to facilitate the operator to apply force.

[0231] The outer needle rod 203 is connected to the first lead screw 1022. By rotating the first dial 1021, the first lead screw 1022 can be driven to move the outer needle rod 203 along the axis of the outer needle rod 203, thereby opening or closing the needle outlet.

[0232] like Figure 7 As shown, a second marking layer 1016 is provided on one side of the second slot 1015 to indicate the opening and closing status of the needle extension outlet.

[0233] like Figure 9 As shown, a sealing ring 1024 is provided inside the first lead screw 1022. Multiple sealing rings 1024 can be provided to increase sealing reliability. Multiple sealing rings 1024 are arranged sequentially along the axial direction of the first lead screw 1022. A sealing gasket 1023 is also provided in the first lead screw 1022, which fixes the sealing rings 1024 between the first lead screw 1022 and the outer needle rod 203. The sealing rings 1024 seal the proximal end of the outer needle rod 203. The outer needle rod 203 is also connected to an injection bend 1025. A portion of the injection bend 1025 extends radially along the outer needle rod 203 and passes through the first lead screw 1022, while another portion extends axially along the bend.

[0234] Therefore, it can be seen that the first lead screw 1022, the outer needle rod 203, the sealing pressure pad 1023, and the sealing ring 1024 form an injection cavity, which is connected to the injection bend 1025. The injection tube 3 is connected to the injection bend 1025, and thus to the injection cavity. Therefore, physiological saline (used to expand the ablation range) or other clinical agents (such as alcohol, anesthetics, etc.) can be injected into the injection cavity (outer needle rod 203) through the injection tube 3 via the injection bend 1025.

[0235] The first scale line 1012 and the second scale line 10110 can be set, for example, with each 5mm increment as a small scale and each 10mm increment as a large scale.

[0236] The first working end adjustment mechanism 103 and the first sub-needle extension and retraction mechanism 104 described in this embodiment 2 can be linked by the option adjustment mechanism described in the above embodiment 1, so that the operator can control the first working end adjustment mechanism 103 or the first sub-needle extension and retraction mechanism 104 by operating the option adjustment mechanism.

[0237] Example 3

[0238] like Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, in Embodiment 2 of the present invention, the working end adjustment mechanism is a second working end adjustment mechanism 110, which controls the insulating tube 201 to move along its axial direction, thereby adjusting the working end. The sub-needle unfolding and retracting mechanism is a second sub-needle unfolding and retracting mechanism 111, which controls the sub-needle 204 to move along its axial direction, thereby adjusting the unfolded size of the sub-needle 204.

[0239] Specifically, such as Figure 14 As shown, the second working end adjustment mechanism 110 is a linear slide rail slider mechanism. For example... Figure 15 The second working end adjustment mechanism 110 includes a first push button 1101, and an insulating tube 201 is connected to the first push button 1101.

[0240] The first housing 101 and / or the second housing 109 are provided with a slide rail (or slide groove). A part of the first push button 1101 is slidably disposed in the slide rail (or slide groove), and the other part of the first push button 1101, namely the pushing part, is disposed outside the handle 100, so as to facilitate the application of force.

[0241] By pushing the first push button 1101 to move it in the slide rail (or slide groove), the insulating tube 201 is moved along its axis, thereby realizing the adjustment of the working end.

[0242] like Figure 15 As shown, the first push button 1101 is provided with a spring-loaded positioning pin 1102, such as... Figure 12 As shown, the second housing 109 has a positioning groove 11021. When the first push button 1101 moves to the vicinity of one of the positioning grooves 11021, the elastic positioning pin 1102 is popped out and locked into the positioning groove 11021, thereby locking the first push button 1101 in the current position. When the first push button 1101 is pushed further, the elastic positioning pin 1102 is pushed by the inner wall of the second housing 109 and retracts, so that the first push button 1101 can drive the insulating tube 201 to move and lock into the next positioning groove 11021.

[0243] like Figure 15 As shown, the first push button 1101 has a second indicator line 11011 on its pushing part, which is used to indicate the size of the adjustment working end (it can be judged by its position relative to the scale line on the handle 100).

[0244] like Figure 15 As shown, the first push button 1101 is provided with a second through hole 11012, which is used to allow the first baffle plate 107 described in the above embodiment 2 to pass through, thereby blocking the internal structure of the handle 100.

[0245] like Figure 18As shown, the second needle deployment and retraction mechanism 111 is a composite mechanism of a gear rack and a linear slide block. Specifically, the second needle deployment and retraction mechanism 111 includes a fourth rack 1111, a fourth gear 1116 meshing with the fourth rack 1111, and a third handle 1117 connected to the fourth gear 1116 via a shaft. Furthermore, the second needle deployment and retraction mechanism 111 also includes a second push button 1112 disposed on the needle connecting portion (same as the needle connecting portion 11931 in Embodiment 1) of the fourth rack 1111. The needle connecting portion is connected to the second push button 1112 via a connecting rod 1113. On the side of the needle connecting portion, the connecting rod 1113 is fixedly connected to the needle connecting portion by a set screw 1114. A fourth pointer 1115 is disposed on the other side of the needle connecting portion.

[0246] In this embodiment 3, the second sub-needle extension and retraction mechanism 111 is a dual-drive composite structure, which can operate the third handle 1117 to drive the sub-needle 204 to extend and retract, and can also operate the second push button 1112 to drive the sub-needle 204 to extend and retract.

[0247] More specifically, one method is to rotate the third handle 1117 to drive the fourth gear 1116 to rotate, thereby driving the fourth rack 1111 to move the sub-needle 204 along its axis, thus realizing the extension and retraction of the sub-needle 204; another method is to push the second push button 1112 to directly drive the fourth rack 1111 and the sub-needle 204 to move linearly, thus realizing the extension and retraction of the sub-needle 204.

[0248] To increase the effective thrust, the second push button 1112 can also be a dual-button structure, meaning that push buttons are provided on both sides of the fourth rack 1111, allowing force to be applied from both sides. The second push button 1112 is connected to the fourth rack 1111 via a connecting rod 1113, and the two are fixed with a set screw 1114. The fourth pointer 1115 is mounted on the fourth rack 1111 and is used to indicate the size of the sub-needle 204.

[0249] The second working end adjustment mechanism 110 and the second sub-needle deployment and retraction mechanism 111 described in this embodiment 3 can be linked by the option adjustment mechanism described in embodiment 1 above, so that the operator can control the second working end adjustment mechanism 110 or the second sub-needle deployment and retraction mechanism 111 by operating the option adjustment mechanism.

[0250] Example 4

[0251] like Figure 16 and Figure 19As shown, in Embodiment 4 of the present invention, the working end adjustment mechanism is a third working end adjustment mechanism 114, which controls the insulating tube 201 to move along its axial direction, thereby adjusting the working end. The sub-needle unfolding and retracting mechanism is a third sub-needle unfolding and retracting mechanism 112, which controls the sub-needle 204 to move along its axial direction, thereby adjusting the unfolded size of the sub-needle 204.

[0252] like Figure 16 As shown, the third working end adjustment mechanism 114 is a gear and rack mechanism, which includes a third handle 1141 located outside the handle 100, a third rotating shaft 1147 connected to the third handle 1141, a fifth gear 1146 passing through the third rotating shaft 1147, a fifth rack 1142 meshing with the fifth gear 1146, a third retaining ring 1143 located between the third handle 1141 and the fifth gear 1146, and a third spacer 1145 located between the third retaining ring 1143 and the fifth rack 1142. The insulating tube 201 is connected to the fifth rack 1142. By rotating the third handle 1141, the third rotating shaft 1147 can be rotated, thereby driving the fifth gear 1146 to rotate, which in turn drives the fifth rack 1142 to move the insulating tube 201 along its axial direction, thus achieving working end adjustment.

[0253] A sixth pointer 1144 is provided at one end of the fifth rack 1142 to indicate the size of the working end.

[0254] like Figure 19 As shown, the third needle deployment and retraction mechanism 112 is a ball screw mechanism, which includes a third dial wheel 1121 and a third screw 1122 connected to the third dial wheel 1121. The third dial wheel 1121 can be located, for example, in the first slot 1013 on the first housing 101 described in Embodiment 2 above. The needle 204 is connected to the third screw 1122. By operating the third dial wheel 1121, the third screw 1122 can be driven to move the axis of the needle 204 linearly, thereby realizing the deployment and retraction of the needle 204.

[0255] A fifth pointer 1123 is provided on the third lead screw 1122 to indicate the size of the sub-needle 204.

[0256] The third working end adjustment mechanism 114 and the third sub-needle extension and retraction mechanism 112 described in this embodiment 4 can be linked by the option adjustment mechanism described in embodiment 1 above, so that the operator can control the third working end adjustment mechanism 114 or the third sub-needle extension and retraction mechanism 112 by operating the option adjustment mechanism.

[0257] Example 5

[0258] like Figure 20 and Figure 21 As shown, in Embodiment 5 of the present invention, the sub-needle unfolding and retracting mechanism is a fourth sub-needle unfolding and retracting mechanism 113. The fourth sub-needle unfolding and retracting mechanism 113 controls the sub-needle 204 to move along its axial direction, thereby adjusting the unfolding size of the sub-needle 204.

[0259] The fourth needle extension and retraction mechanism 113 is a linear slide rail slider mechanism, which includes a third push button 1131. A part of the third push button 1131 is movably disposed in a slide rail (or slide groove) within the first housing 101 and / or the second housing 109. A part of the third push button 1131, namely the pushing part, is located outside the handle 100 to facilitate the application of force.

[0260] The sub-needle 204 is connected to the third push button 1131. By pushing the third push button 1131, the sub-needle 204 can be moved linearly along the axis of the sub-needle 204, thereby realizing the extension and retraction of the sub-needle 204.

[0261] To increase effective thrust, such as Figure 20 As shown, the third push button 1131 can also be a double-button structure, that is, push parts are provided on both sides of the sub-needle 204, so that force can be applied from both sides.

[0262] like Figure 21 As shown, the third push button 1131 is provided with a third indicator line 11311, which is used to indicate the size of the sub-needle 204.

[0263] The fourth needle deployment and retraction mechanism 113 described in this embodiment 5 can be linked with the option adjustment mechanism described in embodiment 1 above and the various working end adjustment mechanisms described in embodiments 1, 2, 3, and 4 above, so that the operator can control the working end adjustment mechanism or control the fourth needle deployment and retraction mechanism 113 by operating the option adjustment mechanism alone.

[0264] Example 6

[0265] like Figure 26 , Figure 27 , Figure 28 As shown, in order to simplify the overall structure and achieve a shield-free structure for the handle 100, in Embodiment 6 of the present invention, the working adjustment mechanism is constructed as a fourth working end adjustment mechanism 115.

[0266] Compared with Embodiment 1 above, Embodiment 6 does not require the first shielding plate 107.

[0267] like Figure 26 , Figure 27 , Figure 28As shown, the fourth working end adjustment mechanism 115 is a ball screw mechanism, which includes a fourth dial 1151 and a fourth screw 1152 threadedly connected to the fourth dial 1151. The insulating tube 201 is connected to the fourth screw 1152, so rotating the fourth dial 1151 can drive the fourth screw 1152 and the insulating tube 201 to move, thereby adjusting the exposed length of the working end.

[0268] The fourth dial 1151 can be disposed in the first slot 1013 on the first housing 101 described in Embodiment 1 above, and a portion of it is located outside the first slot 1013, thereby facilitating the operator to apply force to it.

[0269] like Figure 28 As shown, a first ranging sensor 1153 is installed on the fourth lead screw 1152, as... Figure 27 As shown, a reflector 1154 is provided inside the first housing 101 and / or the second housing 109, and the first ranging sensor 1153 is disposed opposite to the reflector 1154. When the fourth lead screw 1152 moves, it drives the first ranging sensor 1153 to move together.

[0270] The first ranging sensor 1153 can be a laser sensor or an ultrasonic sensor. The energy signal emitted by the first ranging sensor 1153 is reflected by the reflector 1154. The control unit of the ablation needle processes the reflected energy signal into a digital signal and transmits it to the first display screen 116 for display. The working end length can be displayed on the first display screen 116. Alternatively, the control unit of the ablation needle can transmit the digital signal to the ablation host through the cable 5, and the ablation host can display the working end length.

[0271] The fourth working end adjustment mechanism 115 described in this embodiment 6 can be linked with the sub-needle deployment and retraction mechanism described in embodiments 1, 2, 3, 4, and 5 above through the option adjustment mechanism described in embodiment 1 above. Thus, the operator can control the fourth working end adjustment mechanism 115 or the sub-needle deployment and retraction mechanism by operating the option adjustment mechanism alone.

[0272] Example 7

[0273] like Figure 29 , Figure 30 and Figure 31 As shown, in order to simplify the overall structure and achieve a shield-free structure for the handle 100, in Embodiment 7 of the present invention, the sub-needle deployment and retraction mechanism is constructed as a fifth sub-needle deployment and retraction mechanism 117.

[0274] Compared with Embodiment 1 above, Embodiment 7 does not require the installation of a second shielding plate 108.

[0275] like Figure 29 , Figure 30 and Figure 31 As shown, the needle deployment and retraction mechanism is the fifth needle deployment and retraction mechanism 117. The fifth needle deployment and retraction mechanism 117 is a ball screw structure, comprising a fifth dial wheel 1171 and a fifth lead screw 1172 threadedly connected to the fifth dial wheel 1171. The needle 204 is connected to the fifth lead screw 1172. By rotating the fifth dial wheel 1171, the fifth lead screw 1172 can be driven to move the needle 204 along its axial direction.

[0276] The fifth dial 1171 can be disposed in the second slot 1015 on the first housing 101 described in Embodiment 1 above, and a portion of it is located outside the second slot 1015, thereby facilitating the operator to apply force to it.

[0277] like Figure 31 As shown, a second ranging sensor 1173 is installed on the fifth lead screw 1172, as... Figure 30 As shown, a reaction plate 1174 is provided inside the first housing 101 and / or the second housing 109, which is located above the second ranging sensor 1173.

[0278] The second ranging sensor 1173 can be a grating sensor, capacitive grating sensor, magnetic grating sensor, resistance sensor, or capacitance sensor. The energy signal or electrical signal emitted by the second ranging sensor 1173 is fed back to the control unit of the ablation needle through the reaction plate 1174. The control unit of the ablation needle processes it into a digital signal and transmits it to the second display screen 118. The second display screen 118 displays the size of the sub-needle 204. Alternatively, the control unit of the ablation needle can transmit the digital signal to the ablation host through the cable 5, and the ablation host displays the size of the sub-needle 204.

[0279] The fifth needle deployment and retraction mechanism 117 described in this embodiment 7 can be linked with the option adjustment mechanism described in embodiment 1 above and the working end adjustment mechanisms described in embodiments 1, 2, 3, 4, and 5 above, so that the operator can control the working end adjustment mechanism or control the fifth needle deployment and retraction mechanism 117 by operating the option adjustment mechanism alone.

[0280] Example 8

[0281] like Figure 32 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, second working end adjustment mechanism 110, and first needle extension / retraction mechanism 104. The second working end adjustment mechanism 110 is the linear slide rail slider mechanism described in Embodiment 3, and the first needle extension / retraction mechanism 104 is the gear and rack mechanism described in Embodiment 2.

[0282] The ablation needle of Embodiment 8 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0283] Example 9

[0284] like Figure 33 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle deployment and exit opening and closing mechanism 102, a first working end adjustment mechanism 103, and a second needle deployment and retraction mechanism 111. The first working end adjustment mechanism 103 is the ball screw mechanism described in Embodiment 2, and the second needle deployment and retraction mechanism 111 is the gear rack and linear slide block composite mechanism described in Embodiment 3.

[0285] The ablation needle of Embodiment 9 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0286] Example 10

[0287] like Figure 34 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle deployment and exit opening and closing mechanism 102, second working end adjustment mechanism 110, and second needle deployment and retraction mechanism 111. The second working end adjustment mechanism 110 is the linear slide rail slider mechanism described in Embodiment 3, and the second needle deployment and retraction mechanism 111 is the gear rack and linear slide rail slider composite mechanism described in Embodiment 3.

[0288] The ablation needle of Embodiment 10 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0289] Example 11

[0290] like Figure 35 As shown, an ablation needle of the present invention is illustrated, which includes the aforementioned needle deployment outlet opening and closing mechanism 102, first working end adjustment mechanism 103, and third needle deployment and retraction mechanism 112. The first working end adjustment mechanism 103 is the ball screw mechanism described in Embodiment 2, and the third needle deployment and retraction mechanism 112 is the ball screw mechanism described in Embodiment 4.

[0291] The ablation needle of Embodiment 11 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0292] Example 12

[0293] like Figure 36 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, second working end adjustment mechanism 110, and third needle extension / retraction mechanism 112. The second working end adjustment mechanism 110 is the linear slide rail slider mechanism described in Embodiment 3, and the third needle extension / retraction mechanism 112 is the ball screw mechanism described in Embodiment 4.

[0294] The ablation needle of Embodiment 12 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0295] Example 13

[0296] like Figure 37 As shown, an ablation needle of the present invention is illustrated, which includes the aforementioned needle extension and retraction mechanism 102, second working end adjustment mechanism 110, and fourth needle extension and retraction mechanism 113. The second working end adjustment mechanism 110 is the linear slide rail slider mechanism described in Embodiment 3, and the fourth needle extension and retraction mechanism 113 is the linear slide rail slider mechanism described in Embodiment 5.

[0297] The ablation needle of Embodiment 13 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0298] Example 14

[0299] like Figure 38 The diagram illustrates an ablation needle of the present invention, which includes the aforementioned needle extension / retraction mechanism 102, first working end adjustment mechanism 103, and fourth needle extension / retraction mechanism 113. The first working end adjustment mechanism 103 is the ball screw mechanism described in Embodiment 2, and the fourth needle extension / retraction mechanism 113 is the linear slide rail slider mechanism described in Embodiment 5.

[0300] The ablation needle of Embodiment 14 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0301] Example 15

[0302] like Figure 39 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, third working end adjustment mechanism 114, and first needle extension / retraction mechanism 104. The third working end adjustment mechanism 114 is the gear and rack mechanism described in Embodiment 4, and the first needle extension / retraction mechanism 104 is the gear and rack mechanism described in Embodiment 2.

[0303] The ablation needle of Embodiment 15 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0304] Example 16

[0305] like Figure 40 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, a third working end adjustment mechanism 114, and a second needle extension / retraction mechanism 111. The third working end adjustment mechanism 114 is the gear and rack mechanism described in Embodiment 4, and the second needle extension / retraction mechanism 111 is the gear and rack and linear slide rail slider composite mechanism described in Embodiment 3.

[0306] The ablation needle of Embodiment 16 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0307] Example 17

[0308] like Figure 41 The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, third working end adjustment mechanism 114, and third needle extension / retraction mechanism 112. The third working end adjustment mechanism 114 is the gear and rack mechanism described in Embodiment 4, and the third needle extension / retraction mechanism 112 is the ball screw mechanism described in Embodiment 4.

[0309] The ablation needle of Embodiment 17 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0310] Example 18

[0311] like Figure 42The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, third working end adjustment mechanism 114, and fourth needle extension / retraction mechanism 113. The third working end adjustment mechanism 114 is the gear and rack mechanism described in Embodiment 4, and the fourth needle extension / retraction mechanism 113 is the linear slide rail and slider mechanism described in Embodiment 5.

[0312] The ablation needle of Embodiment 18 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0313] Example 19

[0314] like Figure 43 As shown, an ablation needle of the present invention is illustrated, which includes the aforementioned needle extension and retraction mechanism 102, fourth working end adjustment mechanism 115, and first needle extension and retraction mechanism 104. The fourth working end adjustment mechanism 115 is the ball screw mechanism described in Embodiment 6, and the first needle extension and retraction mechanism 104 is the gear and rack mechanism described in Embodiment 2.

[0315] The ablation needle of Embodiment 19 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0316] Example 20

[0317] like Figure 44 As shown, an ablation needle of the present invention is illustrated, which includes the aforementioned needle extension and retraction mechanism 102, first working end adjustment mechanism 103, and fifth needle extension and retraction mechanism 117. The first working end adjustment mechanism 103 is the ball screw mechanism described in Embodiment 2, and the fifth needle extension and retraction mechanism 117 is the ball screw structure described in Embodiment 7.

[0318] The ablation needle of Embodiment 20 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0319] Example 21

[0320] like Figure 45The diagram illustrates an ablation needle of the present invention, comprising the aforementioned needle extension / retraction mechanism 102, fourth working end adjustment mechanism 115, and fifth needle extension / retraction mechanism 117. The fourth working end adjustment mechanism 115 is the ball screw mechanism described in Embodiment 6, and the fifth needle extension / retraction mechanism 117 is the ball screw structure described in Embodiment 7.

[0321] The ablation needle of Embodiment 21 of the present invention also includes the handle 100, insulating tube 201, main needle 202, outer needle rod 203, sub-needle 204, injection tube 3, water-cooled circulation tube 4 and cable 5 described in Embodiments 1 and 2 above.

[0322] 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. A handle for an ablation needle, the ablation needle comprising a main needle (202), a sub-needle (204), an insulating tube (201), and an outer needle rod (203), characterized in that, The handle (100) is used to accommodate the proximal portion of the main needle (202) and the proximal portion of the daughter needle (204). A transmission mechanism is provided in the handle (100), the transmission mechanism comprising: The working end adjustment mechanism is used to adjust the exposed length of the working end of the main needle (202). The working end adjustment mechanism is connected to the far end of the insulating tube (201). It can drive the insulating tube (201) to move linearly along its axis, thereby changing the size of the part of the outer needle rod (203) exposed outside the insulating tube (201), thereby changing the exposed length of the working end of the main needle (202). A needle deployment and retraction mechanism, connected to the needle (204), is used to deploy or retract the needle (204) from the needle deployment outlet; and Option adjustment mechanism (119) can switchably link the working end adjustment mechanism and the sub-needle extension / retraction mechanism to form a first position and a second position; when switched to the first position, the option adjustment mechanism (119) is linked with the working end adjustment mechanism, enabling the working end adjustment mechanism to drive the insulating tube (201) to move along its axial direction; when switched to the second position, the option adjustment mechanism (119) is linked with the sub-needle extension / retraction mechanism, enabling the sub-needle extension / retraction mechanism to drive the sub-needle (204) to extend or retract; The option adjustment mechanism (119) includes: A rotary drive unit (11900) includes a first rotating shaft (11910) located inside the handle (100) and a first rotating handle (1191) connected to the first rotating shaft (11910), the first rotating handle (1191) being located above and outside the handle (100); and The push part (11902) includes an option push button (1196) located on the outer side of the handle (100) and connected to the first rotating shaft (11910) on the side of the first rotating shaft (11910); The option push button (1196) is provided with a locking part (11905) on the side near the handle (100). The locking part (11905) can lock the option push button (1196) to the outside of the handle (100), so that the option push button (1196) can move along the axial direction of the first rotating shaft (11910) when it is pushed, thereby switching between the first gear, the intermediate gear and the second gear.

2. The handle of the ablation needle according to claim 1, characterized in that, The option push button (1196) is provided with a locking groove (11961) on the side near the handle (100). The locking groove (11961) extends in a direction perpendicular to the moving direction of the option push button (1196). A baffle (11962) is provided in the locking groove (11961). The end face of the baffle (11962) is flush with the outer wall of the option push button (1196) on the side near the handle (100). The locking part (11905) includes: A locking pin (119051), one end of which is located in the locking groove (11961), and the other end of which is arc-shaped and extends through the stop plate (11962) to the outside of the locking groove (11961); and A spring (119052) is sleeved on the locking pin (119051). The two ends of the spring (119052) abut against the inner wall of the locking groove (11961) and the baffle (11962) respectively. Under the action of the spring (119052), the arc-shaped end of the locking pin (119051) abuts against the side wall of the handle (100).

3. The handle of the ablation needle according to claim 1 or 2, characterized in that, The handle (100) includes a first housing (101) and a second housing (109) disposed opposite to each other, with the first rotary handle (1191) located above and outside the first housing (101); The first rotating shaft (11910) extends in the direction from the first housing (101) to the second housing (109), with one end extending into a rotating groove (1094) on the bottom wall of the second housing (109) and rotatably connected to the rotating groove (1094), and the other end extending to the outside of the first housing (101) to be connected to the first handle (1191).

4. The handle of the ablation needle according to claim 3, characterized in that, The working end adjustment mechanism includes a first gear (1195) and a first rack (1192) that mesh with each other, and the first rack (1192) is connected to the insulating tube (201) outside the main needle (202); the sub-needle extension and retraction mechanism includes a second gear (1190) and a second rack (1193) that mesh with each other, and the second rack (1193) is connected to the sub-needle (204); The second gear (1190) is located below the first gear (1195), and both are connected to the first rotating shaft (11910); The first rack (1192) extends parallel to the second rack (1193), and a support (11920) is provided between them. The support (11920) is located between the proximal sidewall (1092) and the distal sidewall (1093) of the second housing (109) and the first housing (101).

5. The handle of the ablation needle according to claim 4, characterized in that, The second rack (1193) is provided with an insulating tube connecting part (11921), and the insulating tube connecting part (11921) is provided with a first slot (11922), which is used to connect the insulating tube (201). The first rack (1192) is provided with a sub-needle connecting part (11931), and the sub-needle connecting part (11931) is provided with a second slot (11932), which is used to connect the proximal end of the sub-needle (204); The first card slot (11922) and the second card slot (11932) have opposite slotting directions.

6. The handle of the ablation needle according to claim 5, characterized in that, The first housing (101) is provided with a first window (1011) and a second window (1019) spaced apart in the extension direction of the main needle (202). A first pointer (1199) is provided on one side of the insulating tube connection part (11921). The first pointer (1199) extends radially along the insulating tube (201) into the first window (1011) and can move in the first window (1011) to indicate the position of the insulating tube (201). A second pointer (1198) is provided on one side of the sub-needle connecting part (11931). The second pointer (1198) extends radially along the insulating tube (201) into the second window (1019) and can move in the second window (1019) to indicate the size of the sub-needle (204).

7. The handle of the ablation needle according to claim 4, characterized in that, The second housing (109) and the first housing (101) are also provided with a mounting part (1091). The mounting part (1091) is constructed as a columnar groove structure. The mounting part (1091) protrudes outward from the outer surface of the second housing (109) and the first housing (101) to form an internal space. The first gear (1195), the second gear (1190) and the first rotating shaft (11910) are located in the internal space of the mounting part (1091). The option push button (1196) is located on the outer side of the mounting part (1091). The first handle (1191) is located on the upper outer side of the mounting part (1091).

8. The handle of the ablation needle according to claim 4, characterized in that, The first rotating shaft (11910) includes a connecting shaft (11916) connected to the first handle (1191), an intermediate shaft (11911) connected to the connecting shaft (11916), and a first gear shaft (11912) and a second gear shaft (11913) located on both sides of the intermediate shaft (11911). The first gear (1195) and the second gear (1190) are respectively mounted on the first gear shaft (11912) and the second gear shaft (11913). A shaft groove (11917) is provided between the connecting shaft (11916) and the first gear shaft (11912). A retaining ring (1194) is provided in the shaft groove (11917). The retaining ring (1194) is pressed against the end face of the first gear (1195) to limit the axial position of the first gear (1195). A snap ring is provided on the second gear shaft (11913) to limit the axial position of the second gear (1190).

9. The handle of the ablation needle according to claim 4, characterized in that, The first gear (1195) has a first mating part (11951) at one end facing the second gear (1190), and the second gear (1190) has a second mating part (11901) at one end facing the first gear (1195). Both are constructed as splines or mating teeth. The option adjustment mechanism (119) further includes a linkage part (11970), on the inner wall of the linkage part (11970) a third mating part (11971), the third mating part (11971) is constructed as a spline groove or an internal tooth groove, and is respectively meshed with the first mating part (11951) and the second mating part (11901).

10. The handle of the ablation needle according to claim 9, characterized in that, The linkage part (11970) includes a synchronous adjusting wheel (1197) sleeved on the first rotating shaft (11910). The two ends of the synchronous adjusting wheel (1197) are respectively provided with an upper flange (11972) and a lower flange (11973), and an arc groove (11974) is formed between the upper flange (11972) and the lower flange (11973). The pusher (11902) also includes a push rod (11903) and an arc plate (11904); the push rod (11903) extends in a direction perpendicular to the moving direction of the option push button (1196), one end of which passes through the outer side wall of the second housing (109) and the first housing (101) and is connected to the arc plate (11904), and the other end of which is connected to the option push button (1196); The arc plate (11904) is disposed in the arc groove (11974) and is able to move around the first rotating shaft (11910) in the arc groove (11974).

Images