WO2018103572A1

WO2018103572A1 - Button-driven type automatically rotatable and protective puncture needle, and trocar

Info

Publication number: WO2018103572A1
Application number: PCT/CN2017/113728
Authority: WO
Inventors: 朱莫恕
Original assignee: 成都五义医疗科技有限公司
Priority date: 2016-12-09
Filing date: 2017-11-30
Publication date: 2018-06-14
Also published as: CN106510810B; CN106510810A

Abstract

A button-driven type automatically rotatable and protective puncture needle, and a trocar. A puncture needle (200) comprises a handle part (202), a distal part (206), and a rod part (204) therebetween; the distal part (206) comprises a fixed part (310) and a movable part (350); the fixed part (310) comprises a working edge (323); the movable part (350) comprises a movable rod (360), a protective sheath (370), and an axial spring (70); the movable rod (360) comprises a proximal rod (361). The distal part (206) comprises a working mode and a protecting mode; the handle part (202) comprises a locking mechanism (230), a handle base body (210), and a handle bin (290); the locking mechanism (230) is mounted between the handle base body (210) and the handle bin; the handle base body (210) comprises a top handle surface (291), a bottom handle surface (213), and a button hole (216); the locking mechanism (230) comprises a driving member (240), a transmission member (250), and a locking member (270), a driving member reset spring (80), and a locking member reset spring (60). According to the puncture needle and the trocar, the puncture needle and a cannula assembly interact with each other during operation of the puncture needle, and therefore, the puncture needle is switched from the protecting mode to the working mode without an additional operation.

Description

Button-driven automatic rotation protection puncture needle and puncturing device

Technical field

The present invention relates to a minimally invasive surgical instrument, and more particularly to a puncture needle structure.

Background technique

A trocar is a surgical instrument used to create an artificial passage into a body cavity during minimally invasive surgery (especially for hard laparoscopic surgery). The trocar usually consists of a cannula assembly and a puncture needle. The general clinical use is as follows: firstly cut a small mouth on the patient's skin, and then pass the puncture needle through the cannula assembly, the tip of the puncture needle exceeds the distal end of the cannula assembly, and then penetrates the body wall through the skin opening into the body cavity. .

During the penetration of the body wall, the surgeon holds the trocar and applies a large puncturing force to overcome the resistance to puncturing and severing the tissue, as well as the resistance to expansion and swelling of the tissue. The distal end of the needle typically contains a sharp blade that helps reduce the force of puncturing and cutting the tissue. The resistance suddenly disappears at the moment of penetrating the body wall, and the doctor may not accidentally apply force or due to inertia, the blade may accidentally damage the internal tissue of the patient. Therefore, the puncture needle usually includes a protective sleeve that can be selectively moved axially and an automatic locking device, which is called a knife-proof automatic protection puncture needle (hereinafter referred to as a protective puncture needle). The protective puncture needle has a locked state and a released state: when in the released state, the protective sleeve can be retracted from the distal end to the proximal end to expose the blade; when in the protection mode, the protective sleeve cannot be moved from the distal end The proximal end is retracted and the blade is covered by a protective cover. Moreover, the moment of penetrating the body wall, the automatic locking device is triggered almost simultaneously, thereby quickly and automatically switching from the released state to the protected mode. That is, at the moment of penetrating the body wall, the protective cover moves almost to the distal end to cover the blade and lock, thereby preventing the blade from being exposed to cause accidental damage.

The protective puncture needle includes a locking mechanism for effecting switching between the aforementioned working mode and the protective mode. The disclosed invention and the commercially available protective puncture needle typically require additional action (e.g., the operator presses or toggles the locking mechanism by hand) to switch the protection mode to the operational mode. The present invention proposes a puncture needle that utilizes the interaction of the puncture needle with the cannula assembly when the puncture needle is actuated, thereby automatically switching from the protection mode to the working mode puncture needle without additional action.

Summary of the invention

Accordingly, it is an object of the present invention to provide a protective puncture needle that includes an operational mode and a protective mode. The puncture needle includes a locking mechanism for mutually switching between an operation mode and a protection mode.

In one aspect of the invention, a puncture needle includes a handle portion and a distal portion and a stem portion therebetween. The distal portion includes a fixed portion and a movable portion. The fixed portion includes a working edge. The movable portion includes a movable rod, a protective sleeve and an axial spring, the movable rod including a proximal rod. The distal portion includes a working mode and a protection mode formula. The handle portion includes a locking mechanism, a handle base and a handle compartment, the locking mechanism being mounted between the handle base and the handle compartment. The handle base includes a handle top, a handle bottom surface and a button hole. The locking mechanism includes a driving member, a transmission member, a lock member, a driving member return spring, and a lock member return spring. The lock member includes a lock shaft, a lock arm and a release arm. The transmission member includes a transmission shaft, a chute and a drive point. The drive member includes a button portion and a drive portion. The button portion is matched with the button hole and extends beyond the bottom surface of the handle, the lock member shaft is parallel to the drive shaft, the drive portion is matched with the chute, and the drive portion slides along the chute The transmission member is driven to rotate about the drive shaft. The driving point pushes the lock member to rotate about the lock shaft when the transmission member rotates. The lock member return spring rotates the lock member about the lock shaft.

In another aspect of the invention, the locking mechanism includes an initial locked state, a released state, a triggered state, and a reset locked state. When the locking mechanism is in an initial locked state, the locking arm limits the proximal rod from moving distally to the proximal end, the distal portion being in a protective mode. When the locking mechanism is in the released state, the button portion is contracted proximally from the distal end into the interior of the handle portion, the drive point engages with the release arm, and drives the transmission member and the lock member to rotate to lock The arm does not limit the proximal rod, the proximal rod being movable proximally by the distal end, the distal portion being in an operational mode. When the locking mechanism is in a triggered state, the drive point is separated from the release arm and the distal end portion is in an operational mode. When the locking mechanism is in the reset locked state, the driving point is separated from the release arm, the locking arm restricts the proximal rod from being movable from the distal end to the proximal end, and the distal end portion is in the protection mode .

In one aspect, the drive member slides along the axial direction of the rod portion to drive the transmission member to perform a clockwise or counterclockwise rotational movement in a transverse plane perpendicular to the axial direction. In another aspect, a roller is mounted between the driving portion and the chute. In another aspect, the driving member swings in a longitudinal plane parallel to the axial direction of the rod portion to drive the transmission member to rotate clockwise or counterclockwise in a transverse plane perpendicular to the axial direction. .

In still another aspect, the handle compartment includes a peephole, the handle base includes a flag portion having a bold color or the lock member includes a flag portion having a bold color when the distal end portion of the puncture needle is in an operational mode The flag portion is visible through the peephole, and when the distal end portion of the puncture needle is in the protection mode, the flag portion is not visible through the peephole.

Another object of the present invention is to provide a trocar that includes a cannula assembly and any of the foregoing puncturing needles. The sleeve assembly has a central through hole and a top surface of the sleeve, the puncture needle penetrates the sleeve assembly, and the bottom surface of the handle matches the top surface of the sleeve, and pressure is applied to the bottom surface of the handle and the top surface of the sleeve Contacting, forcing the button portion to fully retract inside the handle portion, thereby driving the transmission member and the lock member to rotate until the lock arm of the lock member is rotated to no Limiting the proximal rod.

DRAWINGS

In order to more fully understand the essence of the present invention, a detailed description will be made with reference to the accompanying drawings, in which:

Figure 1 is a perspective view of a trocar assembly;

Figure 2 is a perspective view of a first embodiment of a puncture needle;

Figure 3 is a perspective exploded view of the puncture needle shown in Figure 2;

Figure 4 is a longitudinal sectional view of the blade of Figure 2 in parallel with the blade;

Figure 5 is a cross-sectional view taken along line 5-5 of the puncture needle shown in Figure 4;

Figure 6 is a perspective view of the driving member shown in Figure 3;

Figure 7 is a perspective view of the transmission member shown in Figure 3;

Figure 8 is a reverse perspective view of the transmission member shown in Figure 7;

Figure 9 is a perspective view of the lock member shown in Figure 3;

Figure 10 is a reverse perspective view of the lock member shown in Figure 9;

Figure 11 is a partial perspective view of the handle portion of the puncture needle of Figure 2 hidden behind the handle compartment;

Figure 12 is a partial, partial perspective view of the handle portion of Figure 11;

Figure 13 is a longitudinal sectional view of the blade parallel to the blade of Figure 2 in a released state;

Figure 14 is a partial perspective view of the handle portion of the puncture needle of Figure 13 hidden behind the handle compartment;

Figure 15 is a longitudinal sectional view of the blade of the puncture needle of Figure 13 parallel to the blade when retracted into the handle pocket;

Figure 16 is a partial perspective view of the handle portion of the puncture needle of Figure 15 hidden behind the handle compartment;

Figure 17 is a longitudinal sectional view of the blade parallel to the blade of the puncture needle shown in Figure 15;

Figure 18 is a partial perspective view of the handle portion of the puncture needle of Figure 17 hidden behind the handle compartment;

Figure 19 is a perspective view of a second embodiment of a puncture needle;

Figure 20 is a longitudinal sectional view of the vertical blade of the puncture needle shown in Figure 19;

Figure 21 is a perspective view of the main body of the puncture needle shown in Figure 19;

Figure 22 is a perspective view of the driving member of the puncture needle shown in Figure 19;

Figure 23 is a perspective view of the transmission member of the puncture needle shown in Figure 19;

Figure 24 is a reverse perspective view of the transmission member shown in Figure 23;

Figure 25 is a partial perspective view of the handle portion of the puncture needle of Figure 19 hidden behind the handle compartment;

Figure 26 is a reverse perspective view of the handle portion shown in Figure 25;

Figure 27 is a longitudinal sectional view of the blade perpendicular to the blade of the puncture needle of Figure 19 when it is retracted into the handle compartment;

Figure 28 is a partial perspective view of the handle portion of the puncture needle of Figure 27 hidden behind the handle compartment;

Figure 29 is a longitudinal sectional view of the blade perpendicular to the movable rod of the puncture needle shown in Figure 27;

Figure 30 is a partial perspective view of the handle portion of the puncture needle of Figure 29 hidden behind the handle compartment;

Figure 31 is a perspective view of another lock embodiment;

Figure 32 is a reverse perspective view of the lock member of Figure 31.

In all the views, the same reference numerals indicate equivalent parts or parts.

detailed description

Embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are merely examples of the invention, which may be implemented in various ways. Therefore, the disclosure of the present invention is not to be construed as limiting, but as a basis

Figure 1-2 depicts the overall structure of the trocar. A typical trocar includes a cannula assembly 100 and a puncture needle 200. The cannula assembly 100 includes a sealed cartridge 110 and a venting valve 120. The sealed chamber 110 includes a casing top surface 111 and a central through hole 113 (not shown), and generally a zero seal (also referred to as an automatic seal) and a sealing film (also referred to as an instrument seal) are sequentially mounted from the distal end to the proximal end in a sealed manner. In the warehouse 110. The zero seal typically does not provide a seal for the insertion instrument and automatically closes and forms a seal when the instrument is removed. The sealing film tightens the instrument and forms a seal when the instrument is inserted. The sleeve 130 includes an open distal end 132 and a hollow tube 133 that communicates with the sealed cartridge 110. The puncture needle 200 can be primarily divided into a handle portion 202, a stem portion 204 and a distal portion 206. The handle portion includes a handle top surface 291 and a handle bottom surface 213.

Referring to Figures 1-2, the puncture needle 200 extends through the cannula assembly 100, and the cannula top surface 111 is in contact with the handle bottom surface 213. One side of the sleeve assembly 100 that defines the venting valve 120 is a front side 107, the opposite side of which is a back side 108 (not shown), with sides 109 on either side. The front face 207, the rear face 208 (not shown) and the left and right side faces 209 of the puncture needle are defined in accordance with the positional relationship when the puncture needle 200 is mated with the cannula assembly 100. When the puncture action is performed, the doctor's finger grips the sealed chamber 110, and the palm is placed against the top surface 291 and the rear surface 208 of the handle, and the puncture operation force is continuously applied to penetrate the patient's body wall. Once the body wall is completely penetrated, the puncture needle is removed, leaving the cannula assembly as a passage for the instrument to enter and exit the body cavity. For convenience of presentation, the subsequent one that is close to the operator is defined as the proximal end, and the side that is remote from the operator is defined as the distal end, and the central axis defining the puncture needle bar portion 204 is the axis 201 (not shown), and subsequently the substantially parallel axis The direction of 201 is referred to as the axial direction, and the direction of the substantially vertical axis 201 is referred to as the lateral direction.

3-12 detail the first embodiment of the present invention, protecting the structural composition and assembly relationship of the puncture needle 200.

The handle portion includes a handle top surface 291 and a handle bottom surface 213. Referring first to Figure 3, the handle portion 202 includes a handle base 210, a locking mechanism 230 and a handle bin 290. The rod portion 204 includes a fixed rod 340 and a movable rod 360. The distal portion 206 includes a blade 320, a shank 330 and a protective sleeve 370. The handle base 210, the fixing rod 340 and the shank 330 are coupled together to constitute the fixed portion 310. The movable rod 360 and the protective sleeve 370 are coupled together to form the movable portion 350. The locking mechanism 230 includes a driving member 240, a transmission member 250, a locking member 270, a driving member return spring 80, and a lock member return spring 60.

Referring to FIG. 3, the blade 320 includes a planar cutter body 322, a cutting edge 321 and two blades 323 that are at an acute angle to each other. Those skilled in the art will appreciate that the blade 320 can be mounted to the shank 330 by a variety of well known joining techniques, such as bonding, welding, mechanical fastening, and the like. The shank 330 in this example includes a post 339 that passes through a through hole 326 in the blade 320 and that is deformed by heat pressing to mount the blade 320 to the fixed step 338 on the shank 330 and Securely fixed. The shank 330 further includes a proximal cylinder 332 and a distal cylinder 336 and a boss 334 therebetween. The shank 330 further includes a central blind bore 333 that includes a via 335 that communicates with the central blind bore 333. The via 335 is approximately rectangular, including a short side 335a and a long side 335b, and the long side 335b is substantially parallel to the axis of the central blind hole 333. The outer surface of the proximal cylinder 332 includes a plurality of bumps 331.

Referring to FIGS. 3 and 4, the fixing rod 340 includes a hollow tube 344 including a first through hole 346 and a second through hole 348. The inner diameter of the second through hole 348 is larger than the first through hole 346, and the first and second through hole intersections form a shoulder 347. The distal end of the fixing rod 340 includes a plurality of through holes 349 that transversely penetrate the hollow tube 344 and communicate with the second through hole 348. Those skilled in the art will appreciate that the shank 330 and the fixed rod 340 can be secured together by a variety of well known joining techniques, such as bonding, welding, mechanical fastening, and the like. In the present example, the shape and size of the proximal cylinder 332 and the second through hole 348 are matched, and the bump 331 is matched with the shape and size of the through hole 349, thereby firmly fixing the shank 330 and the fixing rod 340 together. .

Referring to FIG. 3, the handle base 210 includes a flange 212 that includes an upper surface 211 and a handle bottom surface 213. The fixing rod 340 is coupled to the flange 212, and the first through hole 346 completely penetrates the flange 212. The flange 212 also includes four mounting posts 215 and a button aperture 216 that penetrates the flange 212. The flange 212 further includes a lock shaft 221 that protrudes from the upper surface 211, a drive shaft 223, a spring fixed shaft 225, and a limit block 227.

Referring to Figures 3 and 4, the protective sleeve 370 is generally bullet-shaped and includes a sloped proximal end 372 and a sloped distal end 378 with a cylindrical portion 376 therebetween. The distal end 378 includes a slot 377 (not shown) that matches the shape and size of the blade 320. The protective sleeve 370 also includes a central aperture 373 extending from the proximal end and in communication with the slot 377 portion. The cylindrical portion 376 also includes a side aperture 375 that communicates with the central aperture 373.

Referring to FIG. 3, the movable rod 360 includes a proximal cylinder 362 and a distal cylinder 366 and a boss 364 therebetween, the boss 364 having a diameter greater than the diameter of the proximal cylinder 362. The proximal cylinder 362 includes a proximal rod 361 that includes a pin bore 365.

Referring to Figures 3-4, reference is primarily made to Figure 4. The movable rod 360 is mounted inside the shank 330 and the fixed rod 340, and the proximal end cylinder 362 and the first through hole 346 are matched, the distal end cylinder 366 is matched with the central blind hole 333, and the pin hole 365 and the through hole are matched. 335 is basically aligned. The axial spring 70 is mounted over the proximal cylinder 362 of the travel bar 360 between the platform 347 and the boss 364 and is in a compressed state. The central aperture 373 of the protective sleeve 370 mates with the distal cylinder 366, and the side aperture 375 is substantially aligned with the pin aperture 365. Pin 90 includes a long side 92, a wide side 94 and a high side 96. The pin 90, the pin hole 365, the through hole 335 and the side hole 375 are matched in shape and size. The pin 90 passes through the side hole 375, the through hole 335 and the pin hole 365 in order from the outside to the inside, and the pin 90 and the side hole 375 pass. The fit cooperates to securely secure the protective sleeve 370 and the movable rod 360 together. The size of the long side 335b of the via 335 is larger than the size of the wide side 94 of the pin 90, and the protective sleeve 370 and the movable rod 360 can move together in the axial direction. When the protective sleeve 370 and the movable rod 360 are moved from the distal end to the proximal end to expose the cutting edge 321 or the cutting edge 323, the distal end portion 206 is said to be in the working mode; when the protective sleeve 370 and the movable rod 360 are moved from the proximal end to the distal end When the tip 321 and the blade 323 are locked (i.e., the boot 370 and the movable lever 360 cannot be moved proximally from the distal end), the distal portion 206 is said to be in the protective mode.

Referring to FIG. 6, the driving member 240 includes a vertical shaft portion 241 and a driving shaft 243. The vertical shaft portion 241 can be divided into four parts, a first portion 242, a second portion 244, a third portion 246, and a button 248, depending on the diameter.

Referring to Figures 7-8, the transmission member 250 includes a cylindrical wall 252 and a profiled wall 258 that are interconnected and aligned at a distal end face 259. The cylindrical wall 252 has a proximal end face 253, and the profiled wall 258 has a proximal end face 257 having a height greater than the height of the profiled wall 258 along the axial direction of the cylindrical wall 252. The cylindrical wall 252 defines a rotating shaft 251 and a circular hole 254. The cylindrical wall 252 further includes a chute 255 including a longitudinal direction and a broad side direction, the longitudinal direction of which is not parallel to the rotation axis 251, the chute 255 including the proximal end position 255a and the distal end position 255b. The proximal end face 257 includes a raised drive point 256 that is approximately triangular in shape; the drive point 256 includes a straight face 256a and a ramp face 256b.

Referring to Figures 9-10, the lock member 270 includes a rotating wall 272, a locking arm 278 and a release arm 276. The rotating wall 272 includes a proximal end surface 273 and a distal end surface 279 that define a rotational axis 271 and a circular aperture 274. The locking arm 278 is coupled to the rotating wall 272 and is aligned therewith at both the distal end and the proximal end, the locking arm 278 further including a flag portion 278a. The release arm 276 is coupled to the rotating wall 272, the release arm 276 includes a proximal end surface 275 and a distal end surface 277, the distal end surface 277 and the distal end surface 279 are misaligned, and the distal end surface 277 is distanced The proximal end face 273 is closer.

Referring to Figures 3-12, the transmission member 250 is mounted to the handle base 210, wherein the cylindrical wall 252 mates with the drive shaft 223, the distal end surface 259 mates with the upper surface 211, such that the transmission member 250 can surround the rotary drive shaft 223 rotation. The lock member 270 is mounted to the handle base 210, wherein the rotating wall 272 mates with the lock shaft 221, and the distal end surface 279 mates with the upper surface 211 to allow the lock member 270 to rotate about the lock shaft 221 . The drive member 240 is mounted to the handle base 210, wherein the button 248 mates with the button aperture 216, the third portion 246 is aligned with the upper surface 211, and the drive shaft 243 mates with the ramp 255 of the transmission member 250. When the driving member 240 moves in the axial direction, the driving shaft 243 slides along the inclined groove 255, and the axial sliding of the driving member 240 is converted into the rotational movement of the transmission member 250 about the rotating shaft 251; in order to reduce the driving shaft 243 The sliding friction between the drive shaft 243 and the chute 255 is optional.

Initial Locking State: Referring to Figures 4, 5, 11, and 12, the torsion spring 60 is mounted on the lock shaft 221, one end 64 of the lock return spring 60 is defined by the spring retaining shaft 225, and the other end 66 is locked. Arm 278 is defined. The lock member return spring 60 is in a stressed state, forcing the lock member 270 to rotate clockwise around the lock member shaft 221 (as viewed from the proximal end toward the distal end face) until the lock arm 278 is defined by the stop block 227, which is referred to as a locked state. . When in the locked state, the locking arm 278 just blocks the first through hole 246, so that the movable rod 360 cannot be retracted. As described above, the protective sleeve 370 cannot be retracted, and the cutting edge 321 or the cutting edge 323 is not exposed. That is, the distal end portion of the puncture needle is in the protection mode. Referring to Figures 3-5, the handle compartment 290 includes a proximal end surface 291 and an inner compartment 292 that includes four approximately uniform blind holes 295 that are aligned with the fixed post 215 and are interspersed Cooperating, the handle compartment 290 and the handle base 210 are firmly fixed together. Referring to Figures 11-12, the drive member return spring 80 is mounted on the first portion 242 of the drive member 240 (between the drive member 240 and the handle housing 290) and in a compressed state such that the button 248 extends beyond the handle bottom surface 213 of the handle base 210; The horizontal axis portion 243 is at the distal end position 255b of the chute 255; and the straight face 256a of the drive point 256 just contacts the release arm 276.

Release state: Referring to Figures 1, 13 and 14, the puncture needle 200 is passed through the cannula assembly 100, and the proximal end surface 111 and the handle bottom surface 213 are matched. When the puncturing action is performed, the doctor's fingers grip the sealing chamber 110 and the palms abut the proximal end surface 291, forcing the button 248 of the driving member 240 to retract axially into the handle housing 290. When the driving member 240 is retracted in the axial direction, the transverse shaft 243 moves along the chute 255 toward the proximal position 255a, forcing the transmission member 250 to rotate counterclockwise about the axis 251 (as viewed from the proximal end toward the distal end surface), The drive point 256 pushes the release arm 276 to rotate counterclockwise about the lock shaft 221. The lock arm 278 simultaneously rotates counterclockwise, and the first through hole 246 is opened. At this time, the movable rod 360 can be axially retracted, which is called a release state.

Trigger state: Referring to Figures 13 and 14, the puncture needle 200 is in the released state as described above, when the protective sleeve 370 is subjected to axial compression force to move from the distal end to the proximal end to expose the blade 292: state 1, the movable lever 360 Proximal The lever 361 contacts the release arm 276, and continued motion forces the lock return spring 60 to axially compress and release the arm 276 to produce axial displacement from the distal end to the proximal end to disengage from the drive point 256, i.e., the lock is released. State 2, with reference to Figures 15 and 16, the proximal rod 361 continues to move from the distal end to the proximal end of the stroke, at which time the release arm 276 has been completely disengaged from the drive point 256, and the lock member 250 is in the lock return spring The torque of 60 is rotated clockwise by a certain angle until the locking arm 278 is blocked by the proximal rod 361. State 1, State 2 The distal end portion of the puncture needle is in an operational mode.

Reset Locking State: Referring to Figures 17 and 18, once the puncture needle completely penetrates the body wall, the axial pressure experienced by the protective sheath 370 disappears, and the protective sleeve 370 and the movable rod 360 rapidly move distally under the axial spring 70 thrust. At the same time, the lock member 270 is rapidly rotated clockwise by the torque of the lock member return spring 60 until it is blocked by the stopper 227; at this time, the lock arm 278 blocks the first through hole 246, so that the movable lever 360 cannot Retracting from the distal end to the proximal end, the tip of the puncture needle is changed from the working mode to the protective mode, that is, when the puncture needle penetrates the abdominal wall and continues to move to the body cavity and contacts the organ or tissue in the body cavity, the blade 292 is not exposed, only the protective sleeve Contact with organs or tissues in the cavity can effectively protect.

When the trocar has penetrated to the target position, the physician releases the hand and the driver return spring 80 urges the drive member 240 to reset, i.e., the button 248 extends beyond the handle bottom surface 213 and the lateral shaft portion 243 extends toward the distal end position 255b of the chute 255. Movement, forcing the transmission member 250 to rotate clockwise about the axis 251 to the drive point 256 in contact with the release arm 276; continuing to rotate clockwise, the ramp face 256b of the drive point 256 forces the lock return spring 60 to axially compress and release the arm 276 from far Axial displacement of the proximal end; continued clockwise rotation to the end point, at which time the ramp surface 256b is disengaged from the release arm 276, the lock return spring 60 axially dilates and the release arm 276 produces axial displacement from the proximal end to the distal end So that the straight face 256a just touches the release arm 276, that is, the initial locked state.

Referring to Figures 2, 3, 11, 14 and 16, the handle compartment 290 includes a peephole 293, which includes a striking color. When the tip of the puncture needle is in the protection mode, the flag surface 278a blocks the limiting block 227, and the eye color is not visible through the peephole 293; when the tip of the puncture needle is in the working mode, the flag surface 278a is not The occlusion or only partial occlusion of the stop block 227, visible color through the peephole 293, provides a visual warning to the surgeon, reminding the doctor to notice the sharp tip of the puncture needle exposed. A person skilled in the art can make simple adaptive modifications, and the flag face 278a can also be designed to be a striking color for providing visual warning.

19-20 illustrate a second embodiment of the puncture needle 400 of the present invention. The numerical designations of the geometrical structures in Figures 19-20 are the same as the corresponding numerical references in Figures 2-15, indicating that the structures of the same numerical reference numerals in Example 2 and Example 1 are substantially identical. The puncture needle 400 can be primarily divided into a handle portion 402, a stem portion 204 and a distal portion 206. That is, the puncture needle 400 has substantially the same rod portion 204 and distal end portion 206 as the puncture needle 200, and the composition and assembly of the rod portion and the distal portion are not described later. The distal end portion of the puncture needle 400 also includes an operating mode And protection mode. The handle portion 402 includes a handle base 410, a locking mechanism 430 and a handle bin 490. The locking mechanism 430 includes a driving member 440, a transmission member 460, a locking member 270, and a driving member return spring 40.

Referring to Figure 21, the handle base 410 includes a flange 412 that includes an upper surface 411 and a handle bottom surface 413. The fixing rod 340 is coupled to the flange 412, and the first through hole 346 completely penetrates the flange 412. The flange 412 also includes four mounting posts 415 and a button aperture 416 that penetrates the flange 412. The flange 412 further includes a lock shaft 421 protruding from the upper surface 411, a drive shaft 423, a spring limit post 425, a spring fixed shaft 426, a limit block 427 and a driver base 429.

Referring to FIG. 22, the drive member 440 includes a lever 442 having one end including a drive shaft 444 and the other end including a button 448. The rotating shaft 446 is on a lever 442 between the drive shaft 444 and the button 448.

Referring to Figures 23-24, the transmission member 460 includes a cylindrical wall 462 and a profiled wall 468 that are interconnected and aligned at a distal end face 469. The cylindrical wall 462 has a proximal end face 463 and the profiled wall 468 has a proximal end face 467 having a height that is greater than the height of the profiled wall 468. The cylindrical wall 462 defines a rotating shaft 461 and a circular hole 464. The cylindrical wall 462 further includes a chute 465 including a longitudinal direction and a broad side direction, the longitudinal direction of which is not parallel to the rotational axis 461, the chute 465 including the proximal end position 465a and the distal end position 465b. The proximal end face 467 includes a raised drive point 466 that is approximately triangular in shape; the drive point 466 includes a straight face 466a and a ramp face 466b. The transmission member 460 also includes a spring retaining position 468a.

Ref. 20-26: The transmission member 460 is mounted to the handle base 410, wherein the cylindrical wall 462 mates with the drive shaft 423, the distal end face 469 mates with the upper face 411 to allow the transmission member 460 to rotate about the drive shaft 423 . The lock member 270 is mounted to the handle base 410, wherein the rotating wall 272 mates with the lock shaft 421, and the distal end surface 279 mates with the upper surface 411 to allow the lock member 270 to rotate about the lock shaft 421. The drive member 440 is mounted to the handle base 410, wherein the button 448 mates with the button aperture 416, the rotary shaft 446 mates with the driver housing 429, and the drive shaft 444 mates with the ramp 465 of the transmission member 460.

Initial Locking State: Referring to Figures 20, 25 and 26, the lock return spring 60 is mounted on the lock shaft 421, one end 64 of the lock return spring 60 is defined by the spring limit post 425, and the other end 66 is locked. Arm 278 is defined. The lock member return spring 60 is in a stressed state, forcing the lock member 270 to rotate clockwise around the lock member shaft 421 (as viewed from the proximal end face to the distal end face) until the lock arm 278 is defined by the stop block 427, which is referred to as a locked state. . When the locking arm 278 is in the locked state, the locking hole 278 just blocks the first through hole 346, so that the movable rod 360 cannot be retracted. As described above, the protective sleeve 370 cannot be retracted, and the cutting edge 321 or the cutting edge 323 is not exposed. That is, the distal end portion of the puncture needle is in the locked mode. Referring to Figures 19-20, the handle bin 490 includes a handle top surface 491 and an inner bin 492 that includes four approximately uniform blind holes 495 (not shown), the blind holes 495 and the fixed post 415 alignment and interference fit In combination, the handle compartment 490 and the handle base 410 are firmly fixed together. The handle securing bin also includes a drive member securing position 496 that collectively defines a rotational axis 446. Referring to Fig. 25, one end of the driving member return spring 40 is mounted on the spring fixing shaft 426 and the other end thereof is mounted on the spring fixing position 468a and is in a stretched state, so that the transmission member 460 is rotated clockwise while the driving shaft 444 is along the same. The ramp surface slides to the proximal position 465a, the button 448 extends beyond the handle bottom surface 413 of the handle base 410, and the straight face 466a of the drive point 466 just contacts the release arm 276.

Release Status: Referring to Figures 27 and 28, the puncture needle 400 extends through the cannula assembly 100 with the proximal end surface 111 and the handle bottom surface 413 matched. When the puncture action is performed, the doctor's fingers grip the seal chamber 110 and the palms abut the handle top surface 491, forcing the button 448 of the drive member 440 to rotate into the handle bin 490. The drive member 440 rotates about a rotational axis 446, the push button 448 rotates toward the proximal end, and the drive shaft 444 simultaneously rotates toward the distal end, and the drive shaft 444 moves along the chute 465 toward the distal end position 465b, forcing the transmission member 460 to surround. The drive shaft 423 rotates counterclockwise (as viewed from the proximal end surface), and the drive point 466 pushes the release arm 276 to rotate counterclockwise around the lock shaft 221, and the lock arm 278 simultaneously rotates, and the first through hole 346 is turn on. At this time, the movable rod 460 can be axially retracted, which is called a release state.

Trigger state: the puncture needle 400 is in the release state as described above, and when the protective sleeve 370 is moved from the distal end to the proximal end by the axial compression force to expose the blade edge 321 or the blade edge 323: state 1, the proximal rod of the movable rod 360 The 361 contact release arm 276 continues to move causing the lock return spring 60 to axially compress and release the arm 276 to produce axial displacement from the distal end to the proximal end to disengage from the drive point 466, i.e., the lock is released. In state 2, the proximal rod 361 continues to move from the distal end to the proximal end, at which point the release arm 276 has been completely disengaged from the drive point 466, and the lock member 270 is clockwise under the torsion of the lock return spring 60. Rotate at an angle until the locking arm 278 is blocked by the proximal rod 361. State 1, State 2 The distal end portion of the puncture needle is in an operational mode.

Reset Locking State: Referring to Figures 29 and 30, once the puncture needle completely penetrates the body wall, the axial pressure received by the protective sheath 370 disappears, and the protective sleeve 370 and the movable rod 360 rapidly move distally under the axial spring 70 thrust. At the same time, the lock member 270 is rapidly rotated clockwise by the torque of the lock member return spring 60 until it is blocked by the stopper 427; at this time, the lock arm 278 blocks the first through hole 346, so that the movable lever cannot be The distal end is retracted to the proximal end, and the distal end portion of the puncture needle is changed from the working mode to the protective mode, that is, when the puncture needle penetrates the abdominal wall and continues to move to the body cavity and contacts the organ or tissue in the body cavity, the blade tip 321 and the blade 323 do not Exposed, only the protective cover contacts the organs or tissues in the cavity, which can effectively protect.

When the trocar has penetrated to the target position, the physician releases the hand, the driver return spring 40 pulls the driver 440 to reset, the drive shaft 444 moves along the chute 465 to the proximal position 465a; while the drive shaft 444 surrounds the axis of rotation 446 The proximal end is rotated and the button 448 is rotated about the rotational axis 446 toward the distal end to expose the handle bottom surface 413. When the drive member return spring 40 pulls the drive member 440 to rotate clockwise, the drive member 460 rotates clockwise about the axis 461 to the drive point 466 to contact the release arm 276; continuing to rotate clockwise, the ramp face 466b of the drive point 466 forces the lock return spring The 60 axial compression and release arms 276 create an axial displacement from the distal end to the proximal end; continue to rotate clockwise to the end point, at which time the ramp face 466b disengages from the release arm 276, and the lock return spring 60 axially relaxes and releases the arm 276 An axial displacement from the proximal end to the distal end is produced such that the straight face 466a just contacts the release arm 276, ie, the initial locked state.

The case shown in the present invention is a knife-piercing needle containing a metal blade, but can also be used for a knife-free needle. It should be readily understood by those skilled in the art that the puncture needle used in endoscopic surgery can be generally divided into two major categories: a knife puncture needle and a knifeless puncture needle. The "knife-in" refers to a metal-containing blade, and the "knife-free" refers to a metal-free blade. Puncture needles containing plastic blades are often referred to as knifeless needles, which is customary in the art. In the previous case, when there is no metal blade and the fixed part has a plastic working edge, it is a knifeless needle.

Many different embodiments and examples of the invention have been shown and described. One of ordinary skill in the art can make adaptations to the methods and apparatus by appropriate modifications without departing from the scope of the invention. For example, the lock member 270 can be modified to the lock member 570 shown in FIGS. 31-32. The lock member 570 includes a shaft 572 and an axis 571. The lock member 570 further includes a first wall 576 and a second wall 578. A connecting wall 574 therebetween. The first wall 576 includes a release position 575 and the second wall 578 includes a locked position 579. One of ordinary skill in the art will appreciate that when the lock member 270 is replaced with the lock member 570, the lock shaft 221 of the handle base 210 should be modified to match the fixed hole of the shaft 572. In the first embodiment and the second embodiment, the rotation axes of the transmission member and the lock member coincide, but one of ordinary skill in the art may conceive that the rotation axes of the transmission member and the lock member need only be substantially parallel. It doesn't have to be coincident. When the rotation axis of the transmission member and the lock member are substantially parallel and do not coincide, the drive point on the transmission member drives the release arm to rotate, the relative displacement between the drive point and the release arm; and when the transmission member and the lock When the rotational axes of the members coincide, when the driving point on the transmission member drives the release arm to rotate, there is no relative sliding or relative sliding between the driving point and the releasing arm. For example, the shape of the driving member, the transmission member and the lock member is modified, or an auxiliary guiding structure is added for the transmission member and the locking member, or a spring is used instead of the spring, or the rotation direction mentioned in the embodiment is modified. For example, in the present invention, the connection between the driving member and the transmission member is a hole shaft fit, but a pin riveting fit, a ball pair fit, or other known rotary fit may be employed. Several corrections have been mentioned, and other modifications are also conceivable to those skilled in the art. Therefore, the scope of the invention should be construed in the appended claims and the claims

Claims

A button-driven automatic rotation protection puncture needle comprising a handle portion and a distal portion and a stem portion therebetween; the distal portion including a fixed portion and a movable portion; the fixed portion including a working edge, the movable portion including an activity a rod, a protective sleeve and an axial spring, the movable rod comprising a proximal rod; the distal portion comprising an operating mode and a protective mode; characterized in that:

The handle portion includes a locking mechanism, a handle base and a handle compartment, the locking mechanism is mounted between the handle base and the handle compartment; the handle base comprises a handle top, a handle bottom surface and a button hole;

The locking mechanism includes a driving member, a transmission member, a locking member, a driving member return spring and a lock member return spring; the lock member includes a lock member rotating shaft, a locking arm and a release arm; the transmission member includes a transmission shaft, a chute and a driving point; the driving member includes a button portion and a driving portion;

The button portion is matched with the button hole and extends beyond the bottom surface of the handle, the lock member shaft is parallel to the drive shaft, the drive portion is matched with the chute, and the drive portion slides along the chute The transmission member is driven to rotate around the transmission shaft; the driving point pushes the lock member to rotate around the lock shaft when the transmission member rotates; and the lock member return spring rotates the lock member about the lock shaft.
A push button driven automatic rotation protection puncture needle according to claim 1, wherein:

The locking mechanism includes an initial locked state, a released state, a triggered state, and a reset locked state;

When the locking mechanism is in an initial locked state, the locking arm limits the proximal rod from being movable from a distal end to a proximal end, the distal portion being in a protection mode;

When the locking mechanism is in the released state, the button portion is contracted proximally from the distal end into the interior of the handle portion, the drive point engages with the release arm, and drives the transmission member and the lock member to rotate to lock The arm does not limit the proximal rod, the proximal rod being movable proximally by the distal end, the distal portion being in an operational mode;

When the locking mechanism is in a triggered state, the driving point is separated from the release arm, and the distal end portion is in an operating mode;

When the locking mechanism is in the reset locked state, the driving point is separated from the release arm, the locking arm restricts the proximal rod from being movable from the distal end to the proximal end, and the distal end portion is in the protection mode .
A button-driven automatic rotation protection puncture needle according to claim 2, wherein said driving member slides in the axial direction of said rod portion to drive said transmission member in a transverse direction perpendicular to said axial direction Rotate clockwise or counterclockwise in the plane.
A button-driven automatic rotation protection puncture needle according to claim 3, wherein said driving portion A roller is mounted between the minute and the chute.
A button-driven automatic rotation protection puncture needle according to claim 2, wherein said driving member swings in a longitudinal plane parallel to an axial direction of said rod portion, driving said transmission member to be perpendicular to A clockwise or counterclockwise rotational motion is made in the transverse plane of the axial direction.
A button-driven automatic rotation protection puncture needle according to claim 1, wherein said handle housing comprises a peephole, said handle base comprises a flag portion having a conspicuous color or said lock member comprises a conspicuous color a flag portion through which the flag portion is visible when the distal end portion of the puncture needle is in an operational mode, and through the peep when the distal end portion of the puncture needle is in a protection mode The hole is not visible in the banner section.
A trocar according to any one of claims 1 to 6, further comprising a sleeve assembly having a central through hole and a sleeve a top surface of the tube, the puncture needle penetrating the sleeve assembly, and the bottom surface of the handle is matched with the top surface of the sleeve, and pressure is applied to bring the bottom surface of the handle into contact with the top surface of the sleeve, forcing the button portion to completely retract The handle portion is internal to drive the transmission member and the lock member to rotate until the lock arm of the lock member is rotated to not limit the proximal rod.