CN220655663U - Telescopic minimally invasive dissecting needle - Google Patents

Abstract

The utility model provides a telescopic minimally invasive dissecting needle which comprises a needle-shaped cutter head, a hollow rod-shaped insulating control handle, a switch button and a telescopic piece, wherein the insulating control handle comprises a handheld shell, a rotary shell and a clamping piece arranged between the rotary shell and the telescopic piece, a first clamping tooth is arranged on the telescopic piece, an opening is formed in the clamping piece, a first clamping groove, a second clamping groove and a third clamping groove are formed in one side of the opening, when the first clamping tooth is positioned in the first clamping groove, the front end of the needle-shaped cutter head is positioned in the front end of the handheld shell. Through promoting the extensible member for first latch moves forward and blocks into the second draw-in groove, and needle-shaped tool bit stretches out short needle-shaped tool bit length, continues to promote the extensible member and moves forward and block into in the third draw-in groove, and the needle-shaped tool bit stretches out long needle-shaped tool bit length, realizes dissecting the tool bit length adjustable of needle, reduces the risk of accidentally injuring the non-operative region. After use, the front end of the needle-shaped cutter head can retract into the front end of the hand-holding shell by rotating the rotary shell.

Description

Telescopic minimally invasive dissecting needle

Technical Field

The utility model relates to the field of medical instruments, in particular to a telescopic minimally invasive dissecting needle.

Background

The minimally invasive dissecting needle is also called a miniature high-frequency needle electrode, is an electrosurgical instrument for tissue cutting instead of a mechanical scalpel, heats the tissue when the high-frequency high-voltage current generated by the tip of an effective electrode contacts with the body, and realizes separation and solidification of the body tissue, thereby achieving the purposes of cutting and hemostasis, and being more applied to minimally invasive surgery. Generally, the lengths of the dissecting needles required for different tissue parts are often different, but the existing minimally invasive dissecting needles all have the problem that the cutter head length of the dissecting needles is not adjustable, and the overlong cutter head can accidentally injure a non-operative area in the operation process, so that the minimally invasive dissecting needles are to be improved.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the telescopic minimally invasive dissecting needle, the length of the cutter head of the dissecting needle is adjustable, and the risk of accidentally injuring a non-operative area can be reduced.

The technical scheme of the utility model is realized as follows:

the utility model provides a scalable wicresoft dissects needle, includes needle tool bit, hollow shaft-like insulating control handle, shift knob and extensible member, and the rear end of needle tool bit is connected with the front end of extensible member, and insulating control handle cladding is in the outside of needle tool bit and extensible member, and the rear end of extensible member exposes outside insulating control handle, and shift knob sets up in the front portion outside of insulating control handle;

the insulation control handle comprises a holding shell, a rotating shell and a clamping piece, wherein the rotating shell and the clamping piece are rotatable relative to the holding shell;

be equipped with first latch on the extensible member, first latch is the inclined plane towards first one side, and screens piece axial is provided with the opening, and open-ended one side is equipped with first draw-in groove, second draw-in groove and third draw-in groove from the back forward in proper order, and first draw-in groove sets up in open-ended rear end, and the third draw-in groove sets up in open-ended front end, and when first latch was located first draw-in groove, needle tool bit's front end was located the front end inside of holding the shell.

Preferably, the outer surface of the rotary housing is provided with indicia indicating the direction of rotation of the rotary housing.

Preferably, the rear end of holding the shell is provided with the fixture block, and the front end circumference of rotatory shell is provided with the rotary groove, fixture block and rotary groove joint.

Preferably, the inner surface of the rotary shell is provided with a convex strip, and the clamping piece is provided with a connecting port matched with the convex strip.

Preferably, the insulating control handle is internally provided with a bearing part, the bearing part comprises a tool bit bearing part and a clamping part connecting part positioned at the rear end of the tool bit bearing part, the longitudinal interface of the tool bit bearing part is semicircular, the clamping part connecting part is clamped with the clamping part, a button connecting part is arranged above the tool bit bearing part, the button connecting part is connected with the lower end of a switch button, and a limiting block is arranged in the middle of the tool bit bearing part.

Preferably, the needle-shaped tool bit comprises a metal part and an insulating part, the metal part comprises a tool tip part and a tool body part, the tool tip part is conical, the insulating part is coated on the outer part of the tool body part, and the tool tip part is exposed out of the insulating part.

Preferably, the metal part is made of pure tungsten or tungsten alloy, the insulating part is made of medical Teflon or medical fluorinated ethylene propylene copolymer, and the insulating control handle is made of polyolefin resin or fluoropolymer.

Preferably, the first latch is provided with a second latch in front of the first latch, and the distance between the first latch and the second latch is greater than the distance between the first latch and the third latch.

Preferably, the telescopic piece is provided with a hollow cavity, the rear end of the needle-shaped tool bit is positioned in the hollow cavity, one end of the power wire is positioned in the hollow cavity and is electrically connected with the rear end of the needle-shaped tool bit, and the other end of the power wire is electrically connected with the connector.

Preferably, the number of switch buttons is two, one of which is a cutting button and the other is an ablation button.

Compared with the prior art, the utility model has the beneficial effects that:

the telescopic minimally invasive dissecting needle comprises a needle-shaped cutter head, a hollow rod-shaped insulating control handle, a switch button and a telescopic piece, wherein the insulating control handle comprises a handheld shell, a rotary shell and a clamping piece provided with an opening, a first clamping groove, a second clamping groove and a third clamping groove are formed in one side of the opening of the clamping piece, first clamping teeth are arranged on the telescopic piece, when the first clamping teeth are located in the first clamping groove, the front end of the needle-shaped cutter head is located inside the front end of the handheld shell. Through promoting the extensible member for first latch moves forward and blocks into second draw-in groove or third draw-in groove, and when first latch is located the second draw-in groove, the needle-shaped tool bit stretches out short needle-shaped tool bit length, and when first latch is located the third draw-in groove, the needle-shaped tool bit stretches out long needle-shaped tool bit length, realizes dissecting the tool bit length adjustable of needle, reduces the risk of accidental injury non-operation region. After the needle-shaped cutter is used, the rotary shell can be rotated to drive the clamping piece to rotate, and the first clamping tooth positioned in the second clamping groove or the third clamping groove moves to the rear end of the opening, so that the front end of the needle-shaped cutter head retracts into the front end of the hand-held shell.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is a front view of the rotary housing of the present utility model;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a top view of a swivel housing of the present utility model;

FIG. 7 is a schematic view of a structure of a detent in the present utility model;

FIG. 8 is a schematic view of the structure of the telescopic member, the positioning member and the needle-shaped cutter head in the initial state of the present utility model;

FIG. 9 is a schematic view of the structure of the telescopic member, the detent member and the needle bit when the short needle bit length is extended in the present utility model;

FIG. 10 is a schematic view of the structure of the telescopic member, the detent member and the needle bit when the length of the needle bit is extended;

FIG. 11 is a schematic view of the structure of the support member of the present utility model;

fig. 12 is a schematic cross-sectional view of a needle-shaped cutter head according to the present utility model.

The attached drawings are identified:

1-needle-shaped tool bit; 11-a metal part; 111-knife tip; 112-a cutter body; 12-an insulating part;

2-insulating control handles; 21-hand-holding the housing; 211-clamping blocks; 22-a rotating housing; 221-a rotating groove; 222-raised strips; 223-labelling; 23-clamping pieces; 231-a first card slot; 232-a second card slot; 233-a third card slot; 234-opening; 235-connection port; 24-a support; 241—a bit support; 242-limiting blocks; 243-a button connection; 244-detent connection;

3-a switch button;

4-a power line;

a 5-linker;

6-telescoping pieces; 61-a first latch; 62-second latch.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 10, a telescopic minimally invasive dissecting needle comprises a needle-shaped cutter head 1, a hollow rod-shaped insulating control handle 2, a switch button 3 and a telescopic piece 6, wherein the rear end of the needle-shaped cutter head 1 is connected with the front end of the telescopic piece 6, the insulating control handle 2 is coated outside the needle-shaped cutter head 1 and the telescopic piece 6, the rear end of the telescopic piece 6 is exposed outside the insulating control handle 2, and the switch button 3 is arranged outside the front part of the insulating control handle 2;

the insulation control handle 2 comprises a holding shell 21, a rotary shell 22 and a clamping piece 23, wherein the rotary shell 22 and the clamping piece 23 are rotatable relative to the holding shell 21, the rotary shell 22 and the clamping piece 23 are coaxially arranged, the rotary shell 22 is connected with the rear end of the holding shell 21, the clamping piece 23 is arranged between the rotary shell 22 and the telescopic piece 6, and the clamping piece 23 is fixedly connected with the rotary shell 22;

the telescopic piece 6 is provided with a first clamping tooth 61, one forward surface of the first clamping tooth 61 is an inclined surface, the clamping piece 23 is axially provided with an opening 234, one side of the opening 234 is sequentially provided with a first clamping groove 231, a second clamping groove 232 and a third clamping groove 233 from back to front, the first clamping groove 231 is arranged at the rear end of the opening 234, the third clamping groove 233 is arranged at the front end of the opening 234, when the first clamping tooth 61 is positioned in the first clamping groove 231, the front end of the needle-shaped cutter head 1 is positioned in the front end of the handheld shell 21, and the inclined surface enables the first clamping tooth 61 to move forwards.

Referring to fig. 8, 9 and 10, in the initial state, the first latch 61 is located in the first latch groove 231, and the front end of the needle bit 1 is located inside the front end of the hand-holding housing 21; when performing surgery, the operator can select the extension length of the front end of the needle-shaped cutter head 1 which is short or long according to the needs:

when the short needle-shaped cutter head length needs to be extended, an operator holds the handheld shell 21 with one hand and pushes the rear end of the telescopic piece 6 with the other hand, so that the telescopic piece 6 moves forwards and drives the needle-shaped cutter head 1 to move forwards, the first clamping teeth 61 on the telescopic piece 6 move forwards through the inclined planes of the first clamping teeth and are clamped into the second clamping grooves 232, and at the moment, the front end of the needle-shaped cutter head 1 extends out of the front end of the handheld shell 21 and extends out of the short needle-shaped cutter head length, so that the risk of accidentally injuring a non-operative area can be reduced;

when the length of the long needle-shaped cutter head needs to be extended, the rear end of the telescopic piece 6 is pushed again, so that the telescopic piece 6 continues to move forwards and drives the needle-shaped cutter head 1 to move forwards, the first latch 61 on the telescopic piece 6 moves forwards through the inclined surface of the first latch 61 and is clamped into the third latch groove 233, and at the moment, the front end of the needle-shaped cutter head 1 extends out of the front end of the handheld shell 21 to be longer. The distance between the first and second clamping grooves 231 and 232 and the distance between the second and third clamping grooves 232 and 233 may be set according to the protruding length of the needle bit;

after the hand-held rotary housing 21 is used, the operator holds the rotary housing 22 with one hand and rotates the rotary housing 22 to the side of the first clamping groove 231 away from the opening 234, the rotary housing 22 rotates to drive the clamping piece 23 to rotate, the first clamping teeth 61 in the second clamping groove 232 or the third clamping groove 233 move to the rear end of the opening 234, and at the moment, the front end of the needle-shaped cutter head 1 retracts into the front end of the hand-held housing 21. If the front end of the needle bit 1 is to be extended again, the rotary housing 22 is turned toward the side of the first locking groove 231 near the opening 234, so that the first locking tooth 61 moves into the first locking groove 231 to restore the original state.

Preferably, referring to fig. 6, the outer surface of the rotary housing 22 is provided with a mark 223 indicating the rotation direction of the rotary housing 22, prompting the operator to rotate the rotation direction of the housing 22 so that the front end of the needle bit 1 is retracted inside the front end of the hand-held housing 21.

Preferably, referring to fig. 2, 3 and 4, a clamping block 211 is provided at the rear end of the hand-held housing 21, a rotating groove 221 is circumferentially provided at the front end of the rotating housing 22, the clamping block 211 is clamped with the rotating groove 221, and the clamping block 211 can move in the rotating groove 221 along the circumferential direction of the rotating housing 22 to realize the rotation of the rotating housing 22.

Preferably, referring to fig. 4, 5 and 7, the inner surface of the rotary housing 22 is provided with a protruding strip 222, the clamping piece 23 is provided with a connecting port 235 adapted to the protruding strip 222, the clamping piece 23 is fixedly connected with the rotary housing 22 through the cooperation of the protruding strip 222 and the connecting port 235, and the clamping piece 23 is driven to rotate when the rotary housing 22 rotates.

Preferably, referring to fig. 1 and 2, a supporting member 24 is disposed in the insulating control handle 2, the supporting member 24 includes a cutter head supporting portion 241 and a clamping member connecting portion 244 located at the rear end of the cutter head supporting portion 241, a longitudinal interface of the cutter head supporting portion 241 is semicircular, the cutter head supporting portion 241 is used for supporting the needle-shaped cutter head 1, the clamping member connecting portion 244 is clamped with the clamping member 23, a button connecting portion 243 is disposed above the cutter head supporting portion 241, the button connecting portion 243 is connected with the lower end of the switch button 3, a limiting block 242 is disposed in the middle of the cutter head supporting portion 241, and the limiting block 242 is used for limiting the needle-shaped cutter head 1 to move forward or backward in the cutter head supporting portion 241, so that the extension or retraction of the needle-shaped cutter head 1 is smoother.

Preferably, referring to fig. 10, the needle bit 1 includes a metal portion 11 and an insulating portion 12, the metal portion 11 includes a tip portion 111 and a body portion 112, the tip portion 111 has a conical shape, the insulating portion 12 is coated on the outside of the body portion 112, and the tip portion 111 is exposed outside the insulating portion 12.

Preferably, the metal part 11 is made of pure tungsten or tungsten alloy, the material of the insulation part 12 is medical Teflon or medical fluorinated ethylene propylene copolymer, and the material of the insulation control handle 2 is polyolefin resin or fluorine polymer.

Preferably, the second latch 62 is disposed in front of the first latch 61, the distance between the first latch 61 and the second latch 62 is greater than the distance between the first latch 231 and the third latch 233, and the two latches can prevent the telescopic member 6 from falling out of the insulating control handle 2.

Preferably, referring to fig. 1 and 2, the telescopic minimally invasive dissecting needle further comprises a power wire 4 and a connector 5, the telescopic piece 6 is provided with a hollow cavity, the rear end of the needle-shaped cutter head 1 is located in the hollow cavity, one end of the power wire 4 is located in the hollow cavity and is electrically connected with the rear end of the needle-shaped cutter head 1, and the other end of the power wire is electrically connected with the connector 5.

Preferably, the number of the switch buttons 3 is two, one is a cutting button, the other is an ablation button, and the electric coagulation or electric cutting function is switched by pressing the cutting button or the ablation button according to the requirement in operation.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A retractable minimally invasive dissecting needle, characterized in that: the novel electric power tool comprises a needle-shaped tool bit (1), a hollow rod-shaped insulating control handle (2), a switch button (3) and a telescopic piece (6), wherein the rear end of the needle-shaped tool bit (1) is connected with the front end of the telescopic piece (6), the insulating control handle (2) is coated on the outsides of the needle-shaped tool bit (1) and the telescopic piece (6), the rear end of the telescopic piece (6) is exposed outside the insulating control handle (2), and the switch button (3) is arranged on the outer side of the front part of the insulating control handle (2);

the insulation control handle (2) comprises a handheld shell (21), a rotary shell (22) and a clamping piece (23), wherein the rotary shell (22) and the clamping piece (23) are rotatable relative to the handheld shell (21), the rotary shell (22) and the clamping piece (23) are coaxially arranged, the rotary shell (22) is connected with the rear end of the handheld shell (21), the clamping piece (23) is arranged between the rotary shell (22) and the telescopic piece (6), and the clamping piece (23) is fixedly connected with the rotary shell (22);

be equipped with first latch (61) on extensible member (6), first latch (61) one side forward is the inclined plane, screens piece (23) axial is provided with opening (234), one side of opening (234) is equipped with first draw-in groove (231), second draw-in groove (232) and third draw-in groove (233) from the back forward in proper order, first draw-in groove (231) set up in the rear end of opening (234), third draw-in groove (233) set up in the front end of opening (234), works as first latch (61) are located in first draw-in groove (231), the front end of needle tool bit (1) is located inside the front end of holding shell (21).

2. The retractable minimally invasive dissecting needle of claim 1, wherein: the outer surface of the rotary housing (22) is provided with a marking (223) indicating the direction of rotation of the rotary housing (22).

3. The retractable minimally invasive dissecting needle of claim 1, wherein: the rear end of the hand holding shell (21) is provided with a clamping block (211), the front end circumference of the rotating shell (22) is provided with a rotating groove (221), and the clamping block (211) is clamped with the rotating groove (221).

4. The retractable minimally invasive dissecting needle of claim 1, wherein: the rotary shell (22) is provided with a raised line (222) on the inner surface, and the clamping piece (23) is provided with a connecting port (235) matched with the raised line (222).

5. The retractable minimally invasive dissecting needle of claim 1, wherein: be provided with bearing spare (24) in insulating control handle (2), bearing spare (24) include tool bit bearing portion (241) and are located screens spare connecting portion (244) of tool bit bearing portion (241) rear end, the longitudinal interface of tool bit bearing portion (241) is semi-circular, screens spare connecting portion (244) with screens spare (23) joint, the top of tool bit bearing portion (241) is equipped with button connecting portion (243), button connecting portion (243) with the lower extreme of shift knob (3) is connected, the middle part of tool bit bearing portion (241) is equipped with stopper (242).

6. The retractable minimally invasive dissecting needle of claim 1, wherein: the needle-shaped cutter head (1) comprises a metal part (11) and an insulating part (12), the metal part (11) comprises a cutter tip part (111) and a cutter body part (112), the cutter tip part (111) is conical, the insulating part (12) is coated on the outer part of the cutter body part (112), and the cutter tip part (111) is exposed outside the insulating part (12).

7. The retractable minimally invasive dissecting needle of claim 6, wherein: the metal part (11) is made of pure tungsten or tungsten alloy, the insulating part (12) is made of medical Teflon or medical fluorinated ethylene propylene copolymer, and the insulating control handle (2) is made of polyolefin resin or fluorine polymer.

8. The retractable minimally invasive dissecting needle of claim 1, wherein: the front of the first latch (61) is provided with a second latch (62), and the distance between the first latch (61) and the second latch (62) is greater than the distance between the first clamping groove (231) and the third clamping groove (233).

9. The retractable minimally invasive dissecting needle of claim 1, wherein: still include power cord (4) and connect (5), extensible member (6) have the cavity, the rear end of needle tool bit (1) is located in the cavity, the one end of power cord (4) be located in the cavity and with the rear end electric connection of needle tool bit (1), the other end with connect (5) electric connection.

10. The retractable minimally invasive dissecting needle of claim 1, wherein: the number of the switch buttons (3) is two, one is a cutting button, and the other is an ablation button.