Transmission mechanism of ablation needle and ablation needle

Abstract

The present invention relates to a transmission mechanism for an ablation needle and an ablation needle, and to the field of ablation technology. The transmission mechanism of the ablation needle of the present invention includes a working end adjustment mechanism, a sub-needle extension and retraction mechanism, and an option adjustment mechanism. The option adjustment mechanism can switchably link the working end adjustment mechanism or the sub-needle extension and retraction mechanism to form a first gear and a second gear; when switched to the first gear, the working end adjustment mechanism is driven to drive the insulating tube to move; when switched to the second gear, the sub-needle extension and retraction mechanism is driven to control the extension or retraction of the sub-needle.

Description

Technical Field

[0001] The present invention relates to the technical field of ablation, and in particular to a transmission mechanism of an ablation needle and the ablation needle. Background Art

[0002] In order to cope with complex lesions or changing environments, the exposed length of the working end of the ablation needle is required to be adjustable, and the size of the sub-needle is required to be adjustable to meet the treatment requirements of different lesion properties, lesion locations, lesion shapes and lesion sizes. Existing ablation needles generally have separate drive mechanisms for the working end and sub-needle, and the operator operates each drive mechanism separately to achieve the adjustable exposed length of the working end and the adjustable size of the sub-needle. Since the operator needs to apply force to each drive mechanism separately, the hand needs to be held in different positions to contact different drive mechanisms, which causes problems such as inconvenience in operation. Summary of the Invention

[0003] The present invention provides a transmission mechanism for an ablation needle and an ablation needle, for solving at least one of the above-mentioned technical problems.

[0004] The present invention provides a transmission mechanism for an ablation needle, comprising:

[0005] A working end adjustment mechanism, connected to the insulating tube of the ablation needle, for driving the insulating tube to move along its axial direction to adjust the exposed length of the working end of the ablation needle;

[0006] a sub-needle deployment and retraction mechanism, connected to the sub-needle of the ablation needle, and configured to drive the sub-needle to be deployed or retracted through the sub-needle deployment outlet; and

[0007] An option adjustment mechanism, which can switchably link the working end adjustment mechanism or the sub-needle extension and retraction mechanism to form a first gear position and a second gear position;

[0008] When switched to the first gear, the working end adjustment mechanism is driven to move the insulating tube;

[0009] When the gear is switched to the second gear, the sub-needle extension and retraction mechanism is driven to control the extension or retraction of the sub-needle.

[0010] In one embodiment, the option adjustment mechanism includes a rotation drive portion, a linkage portion, and a pushing portion;

[0011] The pushing portion is capable of switching between the first gear position and the second gear position,

[0012] When the pushing portion is in the first gear position, the linkage portion connects the rotary driving portion and the working end adjustment mechanism so that the two are linked;

[0013] When the pushing portion is in the second gear position, the linkage portion connects the rotation driving portion and the sub-needle extending and retracting mechanism to link the two.

[0014] In one embodiment, the working end adjustment mechanism includes one or more of a gear rack mechanism, a ball screw mechanism, a linear slide block mechanism, a crank slider mechanism, and a worm gear mechanism;

[0015] The sub-needle extension and retraction mechanism includes one or more of a gear rack mechanism, a ball screw mechanism, a linear slide block mechanism, a crank slider mechanism and a worm gear mechanism.

[0016] In one embodiment, the working end adjustment mechanism includes a first gear rack mechanism having a first mating portion, and the sub-needle deployment and retraction mechanism includes a second gear rack mechanism having a second mating portion;

[0017] A third matching portion is provided on the inner wall of the linkage portion;

[0018] When the pushing part is in the first gear position, the third matching part is connected to the first matching part, so that the rotation drive part is linked to the working end adjustment mechanism; when the pushing part is in the second gear position, the third matching part is connected to the second matching part, so that the rotation drive part is linked to the sub-needle expansion and retraction mechanism.

[0019] In one embodiment, the first gear rack mechanism includes a meshed first gear and a first rack, and the first rack is fixedly connected to the insulating tube;

[0020] The second gear rack mechanism includes a meshed second gear and a second rack, the second rack is fixedly connected to the sub-pin, and the second gear is located below the first gear and the two are coaxially arranged;

[0021] Wherein, the first rack and the second rack are parallel, and both extend along the axial direction of the insulating tube;

[0022] The first matching portion is located at one end of the first gear facing the second gear, and the second matching portion is located at one end of the second gear facing the first gear. Both are constructed as splines or matching teeth.

[0023] The third matching portion is configured as a spline groove or an internal tooth groove and is engaged and matched with the first matching portion and the second matching portion respectively.

[0024] In one embodiment, the rotary drive unit includes a first rotating shaft that passes through the first gear and the second gear in sequence.

[0025] The linkage part includes a synchronous adjustment wheel sleeved on the first rotating shaft, and the synchronous adjustment wheel is located between the first gear and the second gear;

[0026] When the synchronous adjustment wheel moves to the first gear position, the first rotating shaft and the first gear are fixedly connected to achieve linkage between the first rotating shaft and the first gear;

[0027] When the synchronous adjustment wheel moves to the second gear position, the first rotating shaft and the second gear are fixedly connected to achieve linkage between the first rotating shaft and the second gear.

[0028] In one embodiment, the first rotating shaft includes an intermediate shaft located between the first gear and the second gear, the synchronous adjustment wheel is sleeved on the intermediate shaft, and a spline or mating tooth that is mated with the third mating portion is provided on an outer wall of the intermediate shaft.

[0029] In one embodiment, the pushing portion includes an option push button, a push rod connected to the option push button, and an arc plate connected to the push rod. Flanges are respectively provided at both ends of the synchronous adjustment wheel. The arc plate is provided between the flanges and is rotationally connected to the synchronous adjustment wheel.

[0030] In one embodiment, the first rack and pinion mechanism further includes an insulating tube connecting portion connected to the first rack, wherein the insulating tube connecting portion extends radially along the insulating tube and is engaged with the insulating tube;

[0031] The second gear rack mechanism also includes a sub-needle connecting portion connected to the second rack, the sub-needle connecting portion is located on a side of the second rack away from the insulating tube connecting portion, and is arranged opposite to the insulating tube connecting portion, and the sub-needle connecting portion is engaged and connected to the sub-needle.

[0032] In one embodiment, the working end adjustment mechanism is provided with a pointer for indicating the position of the insulating tube or a first distance measuring sensor arranged opposite to a reflective plate inside the ablation needle;

[0033] The sub-needle deployment and retraction mechanism is provided with a pointer for indicating the deployment size of the sub-needle or a second distance measuring sensor provided corresponding to the reaction plate inside the ablation needle.

[0034] The present invention also provides an ablation needle, comprising the above-mentioned transmission mechanism of the ablation needle, wherein the ablation needle comprises an insulating tube, an outer needle rod located inside the insulating tube, a main needle located inside the outer needle rod, and sub-needles arranged circumferentially around the main needle;

[0035] The insulating tube is connected to the working end adjustment mechanism, and the portion between the proximal end of the insulating tube and the main needle tip of the main needle is the working end;

[0036] A sub-needle deployment outlet is provided between the proximal end of the outer needle rod and the needle tip of the main needle, and the sub-needle can be deployed or retracted through the sub-needle deployment outlet.

[0037] Compared with the prior art, the advantage of the present invention is 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 only by operating the single component of the option adjustment mechanism, that is, the two functions of driving the insulating tube to move and driving the sub-needle to extend can be achieved through a single force-applying component, without the need to set different force-applying components for the movement of the insulating tube and the extension of the sub-needle respectively. Therefore, the operation can be simpler and more convenient, and the structure of the ablation needle with multiple functions can be made more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

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

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

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

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

[0043] Figure 2C yes Figure 2B Enlarged view at K;

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

[0045] Figure 2E is a schematic diagram of the three-dimensional structure of the option adjustment mechanism in Example 1 of the present invention, which shows the state when the push portion is in the middle gear position;

[0046] Figure 2F is a schematic diagram of the three-dimensional structure of the option adjustment mechanism in Example 1 of the present invention, showing the state when the push portion is in the middle gear position, and hiding the push portion;

[0047] Figure 2G is a schematic diagram of the three-dimensional structure of the option adjustment mechanism in Example 1 of the present invention, which shows the state when the push portion is in the first gear position;

[0048] Figure 2H This is a schematic diagram of the three-dimensional structure of the option adjustment mechanism in Example 1 of the present invention, which shows the state when the push part is in the second gear.

[0049] Figure 2I 1 is a schematic diagram of the three-dimensional structure of the pushing portion and the linkage portion in Example 1 of the present invention;

[0050] Figure 2J is a schematic diagram of the three-dimensional structure of the pushing portion in Example 1 of the present invention;

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

[0052] Figure 2L is a schematic diagram of the three-dimensional structure of the linkage portion in Example 1 of the present invention;

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

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

[0055] Figure 2O is a schematic diagram of the three-dimensional structure of the first rotating shaft in Example 1 of the present invention;

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

[0057] Figure 2Q 1 is a schematic diagram of the three-dimensional structure of the neutron needle deployment and retraction mechanism of Example 1 of the present invention;

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

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

[0060] Figure 2T is a schematic diagram of the three-dimensional structure of the transmission mechanism in Example 1 of the present invention, showing the support portion between the working end adjustment mechanism and the sub-needle deployment and retraction mechanism;

[0061] Figure 2U is an axial cross-sectional view of the ablation needle in Example 1 of the present invention, showing an optional adjustment mechanism installed in the handle;

[0062] Figure 2V is a schematic diagram of the three-dimensional structure of the handle of the ablation needle in Example 1 of the present invention;

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

[0064] Figure 3 is a front view of the ablation needle in Example 2 of the present invention, showing the state where the working end is at its smallest;

[0065] Figure 4 is a front view of the ablation needle in Example 2 of the present invention, showing the state where the working end is at its largest;

[0066] Figure 5 1 is a front view of the ablation needle in Example 2 of the present invention, showing the state of the sub-needle being unfolded;

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

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

[0069] Figure 8 This is a front view of the neutron needle opening and closing mechanism of Example 2 of the present invention;

[0070] Figure 9 yes Figure 8 Magnified view at C;

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

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

[0073] Figure 12 is a schematic structural diagram of an ablation needle in Example 3 of the present invention;

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

[0075] Figure 14 2 is a schematic diagram of the three-dimensional structure of the second working end adjustment mechanism in Example 3 of the present invention;

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

[0077] Figure 16 2 is a schematic diagram of the three-dimensional structure of the third working end adjustment mechanism in Example 4 of the present invention;

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

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

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

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

[0082] Figure 21 yes Figure 20 Enlarged view at G;

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

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

[0085] Figure 24 is a schematic structural diagram of the second shielding plate in Example 2 of the present invention;

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

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

[0088] Figure 27 yes Figure 26 Enlarged view at H;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0107] Reference numerals:

[0108] 100, handle; 201, insulation 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 shielding plate; 108, second shielding plate; 109, second housing; 1091, mounting portion; 1092, proximal side wall; 1093, distal side wall; 1094, rotation slot;

[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 sub-needle unfolding and retracting mechanism; 111, second sub-needle unfolding and retracting mechanism; 112, third sub-needle unfolding and retracting mechanism; 113, fourth sub-needle unfolding and retracting mechanism; 117, fifth sub-needle unfolding and retracting mechanism;

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

[0114] 119. Option adjustment mechanism;

[0115] 11900, rotary drive unit; 1191, first rotary handle; 11910, first rotary 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 part;

[0118] 11970, linkage portion; 1197, synchronous adjustment wheel; 11971, third mating portion; 11972, upper flange; 11973, lower flange; 11974, arcuate groove;

[0119] 11902, push portion; 1194, first retaining spring; 1196, option button; 11903, push rod; 11904, curved plate; 11961, locking groove; 11962, blocking piece;

[0120] 11905, locking portion; 119051, locking pin; 119052, spring;

[0121] 1192, first rack; 11921, insulation tube connection portion; 11922, first slot;

[0122] 1195, first gear; 11951, first matching portion;

[0123] 1193, second rack; 11931, sub-needle connecting portion; 11932, second slot;

[0124] 1190, second gear; 11901, second mating portion;

[0125] 1198, second pointer; 1199, first pointer;

[0126] 1011, first window; 1012, first scale line; 1013, first notch; 1014, first identification layer;

[0127] 1015, second notch; 1016, second identification layer; 1017, shaft hole; 1018, third identification layer;

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

[0129] 1021, first pulley; 1022, first screw rod; 1023, sealing pressure pad; 1024, sealing ring; 1025, injection elbow;

[0130] 1031, second dial wheel; 1032, second screw rod; 10321, first indicator line; 10322, first through hole;

[0131] 1041, second rotary handle; 1042, third rack; 1043, third gear; 1044, first spacer; 1045, second retaining spring; 1046, third pointer; 1047, second rotating shaft;

[0132] 1101, first push button; 1102, elastic 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 rotary handle;

[0134] 1121, third dial wheel; 1122, third screw rod; 1123, fifth pointer;

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

[0136] 1141, third rotary handle; 1142, fifth rack; 1143, third retaining spring; 1144, sixth pointer; 1145, third spacer; 1146, fifth gear; 1147, third rotating shaft;

[0137] 1151, fourth dial wheel; 1152, fourth screw rod; 1153, first distance measuring sensor; 1154, reflector;

[0138] 1171. Fifth dial; 1172. Fifth lead screw; 1173. Second distance measuring sensor; 1174. Reaction plate. DETAILED DESCRIPTION

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

[0140] Example 1

[0141] like Figure 1A 、 Figure 1B as well as Figure 2A-2W As shown, the present invention provides a transmission mechanism for an ablation needle. On the one hand, it can adjust the exposed length of the working end of the main needle of the ablation needle, so that the size (area) of the region where heat exchange is performed on the main needle of the ablation needle changes, thereby adapting to ablation treatments of different lesion sizes. On the other hand, it can control the extension or retraction of the sub-needles of the ablation needle and adjust the size of the sub-needles, thereby adapting to ablation treatments of different lesion areas and lesion locations. Therefore, by controlling the main needle to change its working end and controlling the extension of the sub-needles through the transmission mechanism, the specifications and categories of ablation needles can be greatly simplified. For manufacturers, it can streamline products and facilitate maintenance and management. For users, there is no need to purchase and use multiple specifications or categories of ablation needles based on lesion size, lesion shape, lesion location, etc., thereby simplifying the procurement process and convenience of use. For patients, complex ablation procedures can be completed with a single puncture, thereby reducing the number of punctures, reducing surgical costs, shortening surgical time, and reducing the risk of recurrence of surgical infection.

[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-cooling circulation tube 4 and a cable 5 .

[0143] The proximal end of the main needle 202 is located within the handle 100, while the distal end is located outside the handle 100. The main needle 202 is constructed as a double-layer structure, with its inlet layer and return layer respectively 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, thereby cooling the main needle 202. The cooling fluid can return from the return layer to the water-cooling circulation pipe 4, thereby circulating water cooling the main needle 202.

[0144] The main needle 202 has a main needle tip, which is a triangular tip structure with a main needle injection hole provided thereon. The interior of the main needle 202 is a hollow structure. The main needle 202 is fluidically connected to the injection tube 3, so that physiological saline, injection anesthetics, 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 hole to expand the ablation range or provide corresponding functions according to clinical needs.

[0145] The outer needle shaft 203 is sleeved over the main needle 202. The outer surface of the outer needle shaft 203 is coated, forming the treatment area (i.e., the working end). A gap exists between the distal end of the outer needle shaft 203 (i.e., the end closest to the main needle tip) and the main needle tip, forming the secondary needle deployment opening.

[0146] The sub-needle 204 is located between the outer needle rod 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 sub-needle extension outlet opening and closing mechanism 102 in the handle 100. The sub-needle extension 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 needle tip of the main needle, so that the opening degree of the sub-needle extension outlet can be variable. For example, the distal end of the outer needle rod 203 and the needle tip of the main needle are in contact with each other, that is, the gap between the two is 0, so that the sub-needle extension outlet is closed, and the sub-needle 204 cannot be extended therefrom; the gap between the distal end of the outer needle rod 203 and the needle tip of the main needle is the largest, so that the sub-needle extension outlet is opened to the maximum extent, so that the extent (or size) that the sub-needle 204 can be extended from the sub-needle extension outlet is the largest.

[0148] The sub-needle opening and closing mechanism 102 is intended to drive the outer needle rod 203 to move along its axial direction relative to the main needle 202, so it can include one or more of a gear rack mechanism, a ball screw mechanism, a linear slide slider mechanism, a crank slider mechanism, and a worm gear mechanism. For example, the ball screw structure described in Example 2 below. Figure 2S As shown, the sub-needle deployment outlet opening and closing mechanism 102 is constructed as a ball screw structure, in which 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 deployment outlet.

[0149] The outer needle rod 203 is also provided with scale lines for calibrating the puncture depth and the length of the working end.

[0150] The sub-needle 204 is connected to the first sub-needle deployment and retraction mechanism 104 in the handle 100 .

[0151] Insulating tube 201 is sleeved over outer needle shaft 203. Made of a thermally insulating material, insulating tube 201 understandably prevents heat exchange in the portion of outer needle shaft 203 covered by insulating tube 201. The portion exposed outside of insulating tube 201 forms the treatment area. Therefore, by moving insulating tube 201, the size of the portion of outer needle shaft 203 exposed outside of insulating tube 201 can be varied, thereby changing 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 deployment and retraction mechanism.

[0153] Among them, the working end adjustment mechanism is connected to the distal end of the insulating tube 201 (i.e., the end away from the needle 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 to the outside of the insulating tube 201, thereby changing the exposed length of the working end.

[0154] The working end adjustment mechanism is intended to drive the insulating tube 201 to move axially relative to the outer needle rod 203, and includes one or more of a gear rack mechanism, a ball screw mechanism, a linear slide 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 rack mechanism and a linear slide slider mechanism.

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

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

[0157] Alternatively, the working end adjustment mechanism may be the third working end adjustment mechanism 114 as described in Example 4 below, which is constructed as a rack and pinion mechanism.

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

[0159] The sub-needle extending and retracting mechanism is connected to the sub-needle 204 and is used to drive the sub-needle 204 to extend or retract from the sub-needle extending and retracting outlet.

[0160] The sub-needle extension and retraction mechanism is intended to drive the sub-needle 204 to move along its axial direction relative to the main needle 202. It includes one or more of a gear rack mechanism, a ball screw mechanism, a linear slide 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 rack mechanism and a linear slide slider mechanism.

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

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

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

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

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

[0166] In embodiment 1 of the present invention, Figure 2A 、 Figure 2B and Figure 2C As shown, an optional adjustment mechanism 119 is also provided, which can switchably link the above-mentioned working end adjustment mechanism and the sub-needle extension and retraction mechanism to form a first gear position and a second gear position.

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

[0168] When switched to the second gear, the option adjustment mechanism 119 is linked with the sub-needle extending and retracting mechanism, so that the sub-needle extending and retracting mechanism can drive the sub-needle 204 to be extended or retracted.

[0169] That is to say, the present invention provides an option adjustment mechanism 119 that can be linked with the working end adjustment mechanism or the sub-needle extension and retraction mechanism in different gears, so that the operator can drive the working end adjustment mechanism and the sub-needle extension and retraction mechanism only by operating the single component of the option adjustment mechanism 119, so that the two functions of driving the insulating tube 201 to move and driving the sub-needle 204 to extend can be achieved through a single force-applying component, without having to set different force-applying components for the movement of the insulating tube 201 and the extension of the sub-needle 204 respectively, so that the ablation needle with multiple functions has a more compact structure and is more convenient to operate.

[0170] like Figure 2D As shown, the option adjustment mechanism 119 includes a rotation driving portion 11900 , a linkage portion 11970 and a pushing portion 11902 .

[0171] Among them, the pushing part 11902 can be in the first gear (such as Figure 2G as shown) and second gear (as shown) Figure 2H When the pusher 11902 is in the first gear, the linkage portion 11970 connects the rotary drive unit 11900 and the working end adjustment mechanism, causing the rotary drive unit 11900 and the working end adjustment mechanism to be in motion. When the pusher 11902 is in the second gear, the linkage portion 11970 connects the rotary drive unit 11900 and the sub-needle deployment and retraction mechanism, causing the rotary drive unit 11900 and the sub-needle deployment and retraction mechanism to be in motion.

[0172] The following uses the working end adjustment mechanism as a gear rack mechanism and the sub-needle extension and retraction mechanism as a gear rack 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 described in the following embodiments.

[0173] Please combine Figure 2M and Figure 2P The working end adjustment mechanism includes a first gear rack mechanism, and the first gear rack mechanism includes a first gear 1195 and a first rack 1192 meshing with the first gear 1195. 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 sub-needle extension and retraction mechanism includes a second gear rack mechanism, and the second gear rack mechanism includes a second gear 1190 and a second rack 1193 meshing with the second gear 1190. 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 in parallel, and both extend along the axial direction of the insulation tube 201.

[0176] Please continue to see Figure 2D The rotation drive unit 11900 includes a first handle 1191 and a first shaft 11910 connected to the first handle 1191. The first handle 1191 is located outside the handle 100 to facilitate the operator's application of force. The first shaft 11910 sequentially passes through the first gear 1195 and the second gear 1190.

[0177] like Figure 2O and Figure 2R As shown, the first rotating shaft 11910 includes a connecting shaft 11916 connected to the first rotating 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. Figure 2F The first gear 1195 and the second gear 1190 are respectively disposed 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, please combine Figure 2OIn order to prevent relative rotation between the first rotating handle 1191 and the connecting shaft 11916, a connecting platform 11914 is provided on the connecting shaft 11916. Accordingly, a anti-rotation groove 119100 is provided in the first rotating handle 1191. The connecting platform 11914 and the inner wall of the anti-rotation groove 119100 abut against each other, thereby preventing relative rotation between the first rotating handle 1191 and the connecting shaft 11916, ensuring that when the operator rotates the first rotating handle 1191, the connecting shaft 11916 can be driven to rotate at the same time.

[0179] In addition, if Figure 2O As shown, a shaft groove 11917 is provided between the connecting shaft 11916 and the first gear shaft 11912. Figure 2D and Figure 2R A first retaining spring 1194 is disposed in shaft groove 11917. First retaining spring 1194 presses against the end face of first gear 1195, with its retaining teeth inserted into shaft groove 11917, thereby limiting the axial position of first gear 1195. Correspondingly, a retaining spring (not shown) may also be disposed on second gear shaft 11913 to limit the axial position of second gear 1190.

[0180] Please combine Figure 2W The first rotary handle 1191 is installed on the first housing 101, and a rotation 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 rotation groove 1094, so that when the first rotary handle 1191 is rotated, it drives the connecting shaft 11916 (first rotating shaft 11910) to rotate relative to the second housing 109 and the first housing 101.

[0181] like Figure 2O As shown, the outer wall of the intermediate shaft 11911 is provided with an intermediate shaft spline 11915. Figure 2D , and please combine Figure 2I and Figure 2L Linkage unit 11970 includes a synchronous adjustment wheel 1197 sleeved on first rotating shaft 11910 (intermediate shaft 11911), located between first gear 1195 and second gear 1190. A third mating portion 11971 is provided on the inner wall of synchronous adjustment wheel 1197. This third mating portion 11971 may be a spline groove or internal tooth groove structure.

[0182] Therefore, if Figure 2E and Figure 2FAs shown, the third mating portion 11971 of the synchronous adjustment wheel 1197 cooperates with the intermediate shaft spline 11915 on the outer wall of the intermediate shaft 11911, so that the synchronous adjustment 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 adjustment wheel 1197 to rotate.

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

[0184] like Figure 2E and Figure 2G As shown, the pushing portion 11902 can push the synchronous adjustment wheel 1197 to move along its axis on the intermediate shaft 11911. When the pushing portion 11902 pushes the synchronous adjustment wheel 1197 to move toward the first gear 1195 to the first gear position, the third matching portion 11971 (as shown in FIG. Figure 2L ) and at the same time with the first matching portion 11951 (as shown) on the outer wall of the first gear 1195 Figure 2M For example, the third matching portion 11971 on the inner wall of the synchronous adjustment wheel 1197 is a spline groove, and the first matching portion 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 adjustment 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 adjustment wheel 1197, so that the synchronous adjustment wheel 1197 is fixedly connected to the first gear 1195 and the intermediate shaft 11911 (first rotating shaft 11910), and the three cannot rotate relative to each other.

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

[0186] like Figure 2E and 2H As shown, the pushing portion 11902 can push the synchronous adjustment wheel 1197 to move along its axis on the intermediate shaft 11911. When the pushing portion 11902 pushes the synchronous adjustment wheel 1197 to move toward the second gear 1190 to the second gear position, the third matching portion 11971 (as shown in FIG. Figure 2L As shown) and at the same time with the second matching portion 11901 on the outer wall of the second gear 1190 (as shown Figure 2N For example, the third matching portion 11971 on the inner wall of the synchronous adjustment wheel 1197 is a spline groove, and the second matching portion 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 adjustment 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 adjustment wheel 1197, so that the synchronous adjustment wheel 1197 is fixedly connected to the second gear 1190 and the intermediate shaft 11911 (the first rotating shaft 11910), and the three cannot rotate relative to each other.

[0187] Therefore, when the pusher 11902 is in the second gear, the rotary drive unit 11900 can be linked with the sub-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 via the synchronization adjustment wheel 1197, the rotation of the first rotating shaft 11910 drives the second gear 1190 to rotate, thereby causing the second rack 1193 meshing with the second gear 1190 to drive the sub-needle 204 to move.

[0188] It can be understood that when the pushing portion 11902 is in the first gear, the first rotating shaft 11910 is fixedly connected to the first gear 1195 through the synchronous adjustment wheel 1197, but is not fixed to the second gear 1190. Therefore, when the first rotating shaft 11910 rotates, it will not drive the second gear 1190 to rotate, that is, the sub-needle 204 will not move; similarly, when the pushing portion 11902 is in the second gear, the first rotating shaft 11910 is fixedly connected to the second gear 1190 through the synchronous adjustment wheel 1197, but is not fixed to the first gear 1195. Therefore, when the first rotating shaft 11910 rotates, it will not drive the first gear 1195 to rotate, that is, the insulating tube 201 will not move.

[0189] It can be understood that the width of the spline groove on the inner wall of the synchronous 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 synchronous adjustment wheel 1197 to the first gear position or the second gear position, the synchronous 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] In addition, the splines or mating teeth on the first gear 1195 are staggered with 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, if Figure 2E and Figure 2F As shown, the pushing portion 11902 and the synchronous adjustment wheel 1197 can also be in an intermediate position, that is, located at the middle position of the intermediate shaft 11911. In this case, the synchronous 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 pushing portion 11902 and the synchronous adjustment wheel 1197 are in the intermediate position, if the operator rotates the first rotating handle 1191, the first rotating shaft 11910 will idle and will not drive the first gear 1195 or the second gear 1190 to rotate, thereby preventing unexpected accidental touches during clinical use.

[0192] like Figure 2IAs shown, the push portion 11902 includes an option push button 1196, a push rod 11903 connected to the option push button 1196, and a curved 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 arcuate groove 11974 is formed between the upper flange 11972 and the lower flange 11973. The curved plate 11904 is disposed between the arcuate grooves 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, but 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 adjustment wheel 1197, it will drive the synchronous adjustment wheel 1197 to move along its axial direction.

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

[0195] like Figure 2J and Figure 2K As shown, the option push button 1196 is further provided with a locking portion 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 the locking groove 11961 is further provided with a blocking piece 11962. The blocking piece 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, whose end located on the outside of the locking groove 11961 protrudes from the outer wall of the option push button 1196 and rests on the side wall of the handle 100. Therefore, when there is no external force or there is an unexpected smaller external force disturbance, the locking part 11905 can lock the option push button 1196 on the handle 100 and will not move; only when the operator pushes the option push button 1196 hard, it can move, thereby switching between the first gear, the middle gear and the second gear.

[0197] like Figure 2B and Figure 2PAs shown, the first gear rack mechanism further includes an insulating tube connecting portion 11921 connected to the first rack 1192. The insulating tube connecting portion 11921 extends radially along the insulating tube 201 and is engaged with the insulating tube. Figure 2P As shown, the insulating tube connecting portion 11921 is perpendicular to the first rack 1192, and a first slot 11922 is provided thereon. Figure 2B and Figure 2T The insulating tube 201 is connected by snapping, welding or bonding 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 sub-needle connection portion 11931 connected to the second rack 1193. The sub-needle connection portion 11931 is located on the side of the second rack 1193 away from the insulating tube connection portion 11921 and is arranged opposite to the insulating tube connection portion 11921. The sub-needle connection portion 11931 is connected to the sub-needle by snap-fitting, welding or bonding.

[0199] like Figure 2Q As shown, the sub-needle connection portion 11931 and the second rack 1193 are perpendicular to each other and are located on the side opposite to the insulation tube connection portion 11921. A second slot 11932 is provided thereon. Figure 2B and Figure 2T The proximal end of the sub-needle 204 penetrates 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 sub-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 rack and pinion mechanism and the second rack and pinion mechanism. The support portion 11920 is configured 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, respectively, 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 connecting portion 11921, as shown in FIG. Figure 2T As shown, the support portion 11920 extends on the second rack 1193 to cross the sub-needle connecting portion 11931.

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

[0202] like Figure 2U and Figure 2V As shown, the second housing 109 (and the first housing 101) is further provided with a mounting portion 1091, which 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 for accommodating 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. Figure 2U 、 Figure 6 and Figure 7 The first housing 101 is provided with a first window 1011, and a first pointer 1199 is located in the first window 1011. The movement of the first pointer 1199 can be observed through the first window 1011. First scale lines 1012 are provided on both sides of the first window 1011. The position of the first pointer 1199 on the first scale lines 1012 on both sides of the first window 1011 can be used to calibrate the length of the working end.

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

[0204] Or as Figure 28 As shown, a first distance measuring sensor 1153 can be provided on the working end adjustment mechanism. The first distance measuring sensor 1153 can be a laser sensor or an ultrasonic sensor. The energy signal emitted by the first distance measuring 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 first display screen 116 can then display the working end length. Alternatively, the control unit of the ablation needle can transmit the digital signal to the ablation host via the cable 5, and the ablation host can then display the working end length.

[0205] The sub-needle deployment and retraction mechanism is provided with a pointer for indicating the deployment size of the sub-needle or a second distance measuring sensor provided 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 connection portion 11931, which is used to indicate the size of the sub-needle. Figure 2U 、 Figure 6 and Figure 7 A second window 1019 is provided on the first housing 101 for observing the second pointer 1198. The second pointer 1198 is located in the second window 1019, and the movement of the second pointer 1198 can be observed through the second window 1019. Second scale lines 10110 are provided on both sides of the second window 1019. The position of the second pointer 1198 on the second scale lines 10110 on both sides of the second window 1019 can be used to calibrate the size of the sub-needle 204.

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

[0208] As described below, a first shielding plate / a second shielding plate may be further provided at 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 as Figure 30 As shown, a second ranging sensor 1173 can be provided on the working end adjustment mechanism. The second ranging sensor 1173 can be a grating sensor, a capacitive grating sensor, a magnetic grating sensor, a resistance sensor or a 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, or 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 Example 2 of the present invention, the working end adjustment mechanism is a first working end adjustment mechanism 103, which controls the axial movement of the insulating tube 201 to adjust the working end. The sub-needle extension and retraction mechanism is a first sub-needle extension and retraction mechanism 104, which controls the axial movement of the sub-needle 204 to adjust the extension size of the sub-needle 204.

[0212] like Figure 6 As shown, the handle 100 comprises a first housing 101 and a second housing 109, which are arranged separately and interlocked. The interior of the handle 100 is provided with a sub-needle deployment opening and closing mechanism 102, a first working end adjustment mechanism 103, a first sub-needle deployment and retraction mechanism 104, a first viewing window 105, a second viewing window 106, a first shielding plate 107, and a second shielding 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 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 1031 and a second screw 1032 threadedly connected to the second dial 1031. The second dial 1031 is arranged in the first slot 1013 on the first housing 101, and a part of it is located outside the first slot 1013, so that the operator can apply force to it.

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

[0216] like Figure 7 As shown, a first marking layer 1014 is provided on one side of the first notch 1013 to indicate the direction of adjustment 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; otherwise, the exposed length of the working end can be increased.

[0217] like Figure 11 As shown, the second screw rod 1032 is provided with a first indicator line 10321, which is used to indicate the size of the adjusted working end. Figure 7 As shown, a first window 1011 is provided on the first housing 101 for observing the first indicator line 10321. First scale lines 1012 are provided on both sides of the first window 1011. The length of the working end can be calibrated 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 window 105 is provided on the first housing 101. The first window 105 is made of a transparent material and is installed on the first window 1011. The position of the first indicator line 10321 can be observed through the first window 105, so as to obtain the distance moved by the insulating tube 201 to indicate the exposed length of the working end.

[0219] Furthermore, in order to prevent the first window 1011 of the first housing 101 from exposing the internal structure of the handle 100, a first shielding plate 107 is provided at a corresponding position of the first window 1011 for shielding. Figure 11 As shown, the second screw rod 1032 is provided with a first through hole 10322 for allowing the first shielding 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 screw rod 1032 rotates and moves, the first baffle plate 107 will block the position where the second screw rod 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 screw rod 1032 moves to any position, only the first indicator line 10321 and the first shielding plate 107 can be viewed through the first window 1011, thereby effectively shielding the internal structure of the handle 100.

[0221] like Figure 7 As shown, the first housing 101 is provided with an axis hole 1017 for mounting the first sub-needle extension and retraction mechanism 104. A third marking layer 1018 is provided on one side of the axis hole 1017 for indicating the adjustment direction of the size of the sub-needle 204.

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

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

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

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

[0226] like Figure 7 As shown, a second window 1019 is provided on the first housing 101 for observing the third pointer 1046. Figure 6 As shown, a second window 106 is provided on the first housing 101. The second 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 window 106, so as to obtain the distance moved by the sub-needle 204 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 second window 1019 on the first housing 101 from exposing the internal structure of the handle 100, a second shielding plate 108 is provided at the corresponding position of the second window 1019. The second shielding plate 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 shielding plate 108 can be viewed through the second window 1019, thereby effectively shielding the internal structure of the handle 100.

[0229] like Figure 7 As shown, the first housing 101 is provided with a second notch 1015 for mounting the sub-needle opening and closing mechanism 102. Figure 3 As shown, the sub-needle deployment outlet opening and closing mechanism 102 is operated to open the sub-needle deployment outlet, and the first sub-needle deployment and retraction mechanism 104 controls the sub-needle 204 to be deployed.

[0230] like Figure 8 and Figure 9 As shown, the sub-needle unfolding outlet opening and closing mechanism 102 is a ball screw structure, which includes a first dial 1021 and a first screw 1022 threadedly connected to the first dial 1021. The first dial 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 screw rod 1022. By rotating the first dial 1021, the first screw rod 1022 can be driven to drive the outer needle rod 203 to move along the axis of the outer needle rod 203, thereby realizing the opening or closing of the sub-needle extension outlet.

[0232] like Figure 7 As shown, a second identification layer 1016 is provided on one side of the second notch 1015 to indicate the open and closed states of the sub-needle deployment outlet.

[0233] like Figure 9 As shown, a sealing ring 1024 is provided inside the first screw rod 1022, and the number of the sealing ring 1024 can be multiple to increase the sealing reliability. A plurality of sealing rings 1024 are arranged in sequence along the axial direction of the first screw rod 1022. A sealing pressure pad 1023 is also provided in the first screw rod 1022, which fixes the sealing ring 1024 between the first screw rod 1022 and the outer needle rod 203. The sealing ring 1024 seals the proximal end of the outer needle rod 203. The outer needle rod 203 is also connected to the injection elbow 1025, a part of the injection elbow 1025 extends along the radial direction of the outer needle rod 203 and passes through the first screw rod 1022, and the other part of the injection elbow 1025 extends along its axial direction.

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

[0235] The first scale line 1012 and the second scale line 10110 can be set, for example, with 5 mm as a small scale and 10 mm 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 only operating the option adjustment mechanism.

[0237] Example 3

[0238] like Figure 12 、 Figure 13 、 Figure 14 and Figure 15As shown, in Example 2 of the present invention, the working end adjustment mechanism is a second working end adjustment mechanism 110, which controls the axial movement of the insulating tube 201 to adjust the working end. The sub-needle extension and retraction mechanism is a second sub-needle extension and retraction mechanism 111, which controls the axial movement of the sub-needle 204 to adjust the extension size of the sub-needle 204.

[0239] Specifically, if Figure 14 As shown, the second working end adjustment mechanism 110 is a linear slide block mechanism. Figure 15 The second working end adjustment mechanism 110 includes a first push button 1101 , and the insulating tube 201 is connected to the first push button 1101 .

[0240] A slide rail (or slide groove) is provided inside the first housing 101 and / or the second housing 109, and a portion of the first push button 1101 is slidably provided in the slide rail (or slide groove), and another portion of the first push button 1101, i.e., the pushing portion, is provided outside the handle 100 to facilitate force application.

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

[0242] like Figure 15 As shown, the first push button 1101 is provided with an elastic positioning pin 1102. Figure 12 As shown, positioning slots 11021 are provided in the second housing 109. When the first push button 1101 moves near one of the positioning slots 11021, the elastic positioning pin 1102 is ejected and snaps into the positioning slot 11021, thereby locking the first push button 1101 in its current position. When the first push button 1101 is further pushed, the elastic positioning pin 1102 is pushed by the inner wall of the second housing 109 and retracts, allowing the first push button 1101 to move the insulating tube 201 and snap into the next positioning slot 11021.

[0243] like Figure 15 As shown, a second indicator line 11011 is provided on the pushing portion of the first push button 1101 for indicating the size of the adjusted working end (which can be determined 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 for allowing the first shielding plate 107 described in the above embodiment 2 to pass through, thereby shielding the internal structure of the handle 100.

[0245] like Figure 18As shown, the second needle extension and retraction mechanism 111 is a composite mechanism of a gear rack and a linear slide block. Specifically, the second needle extension and retraction mechanism 111 includes a fourth rack 1111, a fourth gear 1116 meshingly connected to the fourth rack 1111, and a third rotary handle 1117 connected to the fourth gear 1116 via an axis. In addition, the second needle extension and retraction mechanism 111 also includes a second push button 1112 disposed on the needle connection portion of the fourth rack 1111 (the same as the needle connection portion 11931 of Example 1), which is connected to the second push button 1112 via a connecting rod 1113. On the side of the needle connection portion, the connecting rod 1113 is fixedly connected to the needle connection portion by a set screw 1114. A fourth pointer 1115 is disposed on the other side of the needle connection portion.

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

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

[0248] To increase effective thrust, second push button 1112 can also be a dual-button structure, with push buttons positioned on both sides of fourth rack 1111, allowing for separate force application. Second push button 1112 is connected to fourth rack 1111 via connecting rod 1113, secured with set screw 1114. Fourth pointer 1115 is mounted on fourth rack 1111 and indicates the size of sub-hand 204.

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

[0250] Example 4

[0251] like Figure 16 and Figure 19As shown, in Example 4 of the present invention, the working end adjustment mechanism is a third working end adjustment mechanism 114, which controls the axial movement of the insulating tube 201 to adjust the working end. The sub-needle extension and retraction mechanism is a third sub-needle extension and retraction mechanism 112, which controls the axial movement of the sub-needle 204 to adjust the extension size of the sub-needle 204.

[0252] like Figure 16 As shown, the third working end adjustment mechanism 114 is a rack-and-pinion mechanism, comprising a third rotating handle 1141 located outside the handle 100, a third rotating shaft 1147 connected to the third rotating handle 1141, a fifth gear 1146 passing through the third rotating shaft 1147, a fifth rack 1142 meshingly connected to the fifth gear 1146, a third retaining spring 1143 located between the third rotating handle 1141 and the fifth gear 1146, and a third spacer 1145 located between the third retaining spring 1143 and the fifth rack 1142. The insulating tube 201 is connected to the fifth rack 1142. Rotating the third rotating handle 1141 drives the third rotating shaft 1147 to rotate, 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, thereby achieving working end adjustment.

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

[0254] like Figure 19 As shown, the third sub-needle extension and retraction mechanism 112 is a ball screw mechanism comprising a third paddle wheel 1121 and a third screw rod 1122 connected to the third paddle wheel 1121. The third paddle wheel 1121 can, for example, be located in the first notch 1013 of the first housing 101 described in Example 2 above. The sub-needle 204 is connected to the third screw rod 1122. By operating the third paddle wheel 1121, the third screw rod 1122 can be driven to linearly move the axis of the sub-needle 204, thereby extending and retracting the sub-needle 204.

[0255] A fifth pointer 1123 is provided on the third screw rod 1122 for indicating 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 the above embodiment 1, so that the operator can control the third working end adjustment mechanism 114 or the third sub-needle extension and retraction mechanism 112 by only 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 deployment and retraction mechanism is the fourth sub-needle deployment and retraction mechanism 113 , which controls the sub-needle 204 to move along its axial direction, thereby adjusting the deployment size of the sub-needle 204 .

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

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

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

[0262] like Figure 21 As shown, a third indicator line 11311 is provided on the third push button 1131 for indicating the size of the sub-hand 204 .

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

[0264] Example 6

[0265] like Figure 26 、 Figure 27 、 Figure 28 As shown, in order to simplify the overall structure and realize the shield-free structure of 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 the above embodiment 1, the present embodiment 6 does not need to provide 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 thumbwheel 1151 and a fourth screw rod 1152 threadedly connected to the fourth thumbwheel 1151. The insulating tube 201 is connected to the fourth screw rod 1152, so that rotating the fourth thumbwheel 1151 can move the fourth screw rod 1152 and the insulating tube 201, thereby adjusting the exposed length of the working end.

[0268] The fourth dial 1151 can be disposed in the first notch 1013 on the first housing 101 described in the first embodiment, and a portion of the fourth dial 1151 is located outside the first notch 1013 , so that it is convenient for an operator to apply force thereto.

[0269] like Figure 28 As shown, the fourth screw rod 1152 is provided with a first distance measuring sensor 1153, as shown in FIG. Figure 27 As shown, a reflector 1154 is disposed inside the first housing 101 and / or the second housing 109, and the first distance measuring sensor 1153 is disposed opposite to the reflector 1154. When the fourth screw rod 1152 moves, the first distance measuring sensor 1153 moves 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 length of the working end can be displayed on the first display screen 116, or 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 length of the working end.

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

[0272] Example 7

[0273] like Figure 29 、 Figure 30 and Figure 31 As shown, in order to simplify the overall structure and realize the shield-free structure of 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 the above embodiment 1, the present embodiment 7 does not need to provide the second shielding plate 108 .

[0275] like Figure 29 、 Figure 30 and Figure 31 As shown, the sub-needle deployment and retraction mechanism is the fifth sub-needle deployment and retraction mechanism 117. The fifth sub-needle deployment and retraction mechanism 117 is a ball screw structure comprising a fifth paddle wheel 1171 and a fifth screw rod 1172 threadedly connected to the fifth paddle wheel 1171. The sub-needle 204 is connected to the fifth screw rod 1172. Rotating the fifth paddle wheel 1171 drives the fifth screw rod 1172, which in turn moves the sub-needle 204 along its axial direction.

[0276] The fifth dial 1171 can be disposed in the second notch 1015 on the first housing 101 described in the first embodiment, and a portion of the fifth dial 1171 is located outside the second notch 1015 , so that it is convenient for an operator to apply force thereto.

[0277] like Figure 31 As shown, the fifth screw rod 1172 is provided with a second distance measuring sensor 1173, as shown in FIG. Figure 30 As shown, a reaction plate 1174 is provided inside the first housing 101 and / or the second housing 109 and is located above the second distance measuring sensor 1173 .

[0278] The second ranging sensor 1173 can be a grating sensor, a capacitive grating sensor, a magnetic grating sensor, a resistance sensor or a 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, or 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 sub-needle extension and retraction mechanism 117 described in this embodiment 7 can be linked with the working end adjustment mechanisms described in the above embodiments 1, 2, 3, 4, and 5 through the option adjustment mechanism described in the above embodiment 1, so that the operator can control the working end adjustment mechanism or the fifth sub-needle extension and retraction mechanism 117 by only operating the option adjustment mechanism.

[0280] Example 8

[0281] like Figure 32 FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the second working end adjustment mechanism 110, and the first sub-needle deployment and retraction mechanism 104. The second working end adjustment mechanism 110 is the linear slide mechanism described in Example 3, and the first sub-needle deployment and retraction mechanism 104 is the rack and pinion mechanism described in Example 2.

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

[0283] Example 9

[0284] like Figure 33 FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the first working end adjustment mechanism 103, and the second sub-needle deployment and retraction mechanism 111. The first working end adjustment mechanism 103 is the ball screw mechanism described in Example 2, and the second sub-needle deployment and retraction mechanism 111 is the gear rack and linear slide block composite mechanism described in Example 3.

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

[0286] Example 10

[0287] like Figure 34 FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the second working end adjustment mechanism 110, and the second sub-needle deployment and retraction mechanism 111 described above. The second working end adjustment mechanism 110 is the linear slide block mechanism described in Example 3, and the second sub-needle deployment and retraction mechanism 111 is the gear rack and linear slide block composite mechanism described in Example 3.

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

[0289] Example 11

[0290] like Figure 35 FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the first working end adjustment mechanism 103, and the third sub-needle deployment and retraction mechanism 112. The first working end adjustment mechanism 103 is the ball screw mechanism described in Example 2, and the third sub-needle deployment and retraction mechanism 112 is the ball screw mechanism described in Example 4.

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

[0292] Example 12

[0293] like Figure 36 FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the second working end adjustment mechanism 110, and the third sub-needle deployment and retraction mechanism 112 described above. The second working end adjustment mechanism 110 is the linear slide mechanism described in Example 3, and the third sub-needle deployment and retraction mechanism 112 is the ball screw mechanism described in Example 4.

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

[0295] Example 13

[0296] like Figure 37 FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the second working end adjustment mechanism 110, and the fourth sub-needle deployment and retraction mechanism 113 described above. The second working end adjustment mechanism 110 is the linear slide mechanism described in Example 3, and the fourth sub-needle deployment and retraction mechanism 113 is the linear slide mechanism described in Example 5.

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

[0298] Example 14

[0299] like Figure 38 FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the first working end adjustment mechanism 103, and the fourth sub-needle deployment and retraction mechanism 113. The first working end adjustment mechanism 103 is the ball screw mechanism described in Example 2, and the fourth sub-needle deployment and retraction mechanism 113 is the linear slide mechanism described in Example 5.

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

[0301] Example 15

[0302] like Figure 39 FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the third working end adjustment mechanism 114, and the first sub-needle deployment and retraction mechanism 104 described above. The third working end adjustment mechanism 114 is the rack-and-pinion mechanism described in Example 4, and the first sub-needle deployment and retraction mechanism 104 is the rack-and-pinion mechanism described in Example 2.

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

[0304] Example 16

[0305] like Figure 40 FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the third working end adjustment mechanism 114, and the second sub-needle deployment and retraction mechanism 111 described above. The third working end adjustment mechanism 114 is the rack-and-pinion mechanism described in Example 4, and the second sub-needle deployment and retraction mechanism 111 is the rack-and-pinion and linear slideway composite mechanism described in Example 3.

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

[0307] Example 17

[0308] like Figure 41 FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the third working end adjustment mechanism 114, and the third sub-needle deployment and retraction mechanism 112 described above. The third working end adjustment mechanism 114 is the rack-and-pinion mechanism described in Example 4, and the third sub-needle deployment and retraction mechanism 112 is the ball screw mechanism described in Example 4.

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

[0310] Example 18

[0311] like Figure 42FIG. 1 shows an ablation needle of the present invention, which includes the sub-needle deployment outlet opening and closing mechanism 102, the third working end adjustment mechanism 114, and the fourth sub-needle deployment and retraction mechanism 113 described above. The third working end adjustment mechanism 114 is the rack-and-pinion mechanism described in Example 4, and the fourth sub-needle deployment and retraction mechanism 113 is the linear slide mechanism described in Example 5.

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

[0313] Example 19

[0314] like Figure 43 FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the fourth working end adjustment mechanism 115, and the first sub-needle deployment and retraction mechanism 104. The fourth working end adjustment mechanism 115 is the ball screw mechanism described in Example 6, and the first sub-needle deployment and retraction mechanism 104 is the rack and pinion mechanism described in Example 2.

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

[0316] Example 20

[0317] like Figure 44 FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the first working end adjustment mechanism 103, and the fifth sub-needle deployment and retraction mechanism 117. The first working end adjustment mechanism 103 is the ball screw mechanism described in Example 2, and the fifth sub-needle deployment and retraction mechanism 117 is the ball screw structure described in Example 7.

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

[0319] Example 21

[0320] like Figure 45FIG. 1 shows an ablation needle of the present invention, which includes the aforementioned sub-needle deployment outlet opening and closing mechanism 102, the fourth working end adjustment mechanism 115, and the fifth sub-needle deployment and retraction mechanism 117. The fourth working end adjustment mechanism 115 is the ball screw mechanism described in Example 6, and the fifth sub-needle deployment and retraction mechanism 117 is the ball screw structure described in Example 7.

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

[0322] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A transmission mechanism for an ablation needle, characterized in that: include: a working end adjustment mechanism connected to the insulating tube of the ablation needle and configured to drive the insulating tube to move axially thereof to adjust the exposed length of the working end of the ablation needle, the working end adjustment mechanism comprising a first gear rack mechanism having a first mating portion, the first gear rack mechanism comprising a first gear; a sub-needle deployment and retraction mechanism connected to the sub-needle of the ablation needle and configured to drive the sub-needle to be deployed or retracted through the sub-needle deployment outlet, the sub-needle deployment and retraction mechanism comprising a second gear rack mechanism having a second mating portion, the second gear rack mechanism comprising a second gear, the second gear being located below the first gear and the two being coaxially arranged; and An option adjustment mechanism, which can switchably link the working end adjustment mechanism or the sub-needle extension and retraction mechanism to form a first gear position and a second gear position; When switched to the first gear, the working end adjustment mechanism is driven to move the insulating tube; When the second gear is switched to, the sub-needle extension and retraction mechanism is driven to control the extension or retraction of the sub-needle; The option adjustment mechanism includes a rotation drive part, a linkage part and a pushing part; The pushing portion is capable of switching between the first gear position and the second gear position; A third matching portion is provided on the inner wall of the linkage portion; The first matching portion is located at one end of the first gear facing the second gear, and the second matching portion is located at one end of the second gear facing the first gear, both of which are configured as splines or matching teeth; The third matching portion is configured as a spline groove or an internal tooth groove and is engaged and matched with the first matching portion and the second matching portion respectively.

2. The transmission mechanism of the ablation needle according to claim 1, characterized in that: When the pushing portion is in the first gear position, the linkage portion connects the rotary driving portion and the working end adjustment mechanism so that the two are linked; When the pushing portion is in the second gear position, the linkage portion connects the rotation driving portion and the sub-needle extending and retracting mechanism to link the two.

3. The transmission mechanism of the ablation needle according to claim 2, characterized in that: When the pushing part is in the first gear position, the third matching part is connected to the first matching part, so that the rotation drive part is linked to the working end adjustment mechanism; when the pushing part is in the second gear position, the third matching part is connected to the second matching part, so that the rotation drive part is linked to the sub-needle expansion and retraction mechanism.

4. The transmission mechanism of the ablation needle according to claim 3, characterized in that: The first rack and pinion mechanism includes a first rack meshing with the first gear, and the first rack is fixedly connected to the insulating tube; The second rack and pinion mechanism includes a second rack meshed with the second gear, and the second rack is fixedly connected to the sub-needle, wherein the first rack is parallel to the second rack, and both extend along the axial direction of the insulating tube.

5. The transmission mechanism of the ablation needle according to claim 4, characterized in that: The rotary drive unit includes a first rotating shaft that passes through the first gear and the second gear in sequence. The linkage part includes a synchronous adjustment wheel sleeved on the first rotating shaft, and the synchronous adjustment wheel is located between the first gear and the second gear; When the synchronous adjustment wheel moves to the first gear position, the first rotating shaft and the first gear are fixedly connected to achieve linkage between the first rotating shaft and the first gear; When the synchronous adjustment wheel moves to the second gear position, the first rotating shaft and the second gear are fixedly connected to achieve linkage between the first rotating shaft and the second gear.

6. The transmission mechanism of the ablation needle according to claim 5, characterized in that: The first rotating shaft includes an intermediate shaft located between the first gear and the second gear, the synchronous adjustment wheel is sleeved on the intermediate shaft, and a spline or matching tooth that is matched with the third matching portion is provided on the outer wall of the intermediate shaft.

7. The transmission mechanism of the ablation needle according to claim 5 or 6, characterized in that: The pushing portion includes an option push button, a push rod connected to the option push button, and an arc plate connected to the push rod. Flanges are respectively provided at both ends of the synchronous adjustment wheel. The arc plate is provided between the flanges and is rotationally connected to the synchronous adjustment wheel.

8. The transmission mechanism of the ablation needle according to any one of claims 4 to 6, characterized in that: The first rack and pinion mechanism further includes an insulating tube connecting portion connected to the first rack, wherein the insulating tube connecting portion extends radially along the insulating tube and is engaged with the insulating tube; The second gear rack mechanism also includes a sub-needle connecting portion connected to the second rack, the sub-needle connecting portion is located on a side of the second rack away from the insulating tube connecting portion, and is arranged opposite to the insulating tube connecting portion, and the sub-needle connecting portion is engaged and connected to the sub-needle.

9. The transmission mechanism of the ablation needle according to claim 1 or 2, characterized in that: The working end adjustment mechanism is provided with a pointer for indicating the position of the insulating tube or a first distance measuring sensor arranged opposite to the reflective plate inside the ablation needle; The sub-needle deployment and retraction mechanism is provided with a pointer for indicating the deployment size of the sub-needle or a second distance measuring sensor provided corresponding to the reaction plate inside the ablation needle.

10. An ablation needle, comprising the transmission mechanism of the ablation needle according to any one of claims 1 to 9, characterized in that: The ablation needle includes an insulating tube, an outer needle rod located inside the insulating tube, a main needle located inside the outer needle rod, and sub-needles arranged circumferentially around the main needle; The insulating tube is connected to the working end adjustment mechanism, and the portion between the proximal end of the insulating tube and the main needle tip of the main needle is the working end; A sub-needle deployment outlet is provided between the proximal end of the outer needle rod and the needle tip of the main needle, and the sub-needle can be deployed or retracted through the sub-needle deployment outlet.

Images