CN100594003C

CN100594003C - Plier

Info

Publication number: CN100594003C
Application number: CN200610081807A
Authority: CN
Inventors: 小仓章
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2005-05-12
Filing date: 2006-05-12
Publication date: 2010-03-17
Anticipated expiration: 2026-05-12
Also published as: CN1861007A; JP2006314519A

Abstract

The invention discloses a plier with less component quantity, which comprises the following parts: flexible cord (2), fixed jaw component (10) and mobile jaw component (20), operational component (30), wherein the holding jaw (11) is set in front of fixed jaw component (10) with boss part (12) in the middle to pierce pin through-out hole (12a); the connecting part (23) is formed on the base to connect flexible cord (2); the mobile jaw component (20) possesses contains holding jaw (21) to contact and separate the plier part of holding jaw (11) and pivoted part (22) of pivoted pin (24); the baseof pivoted part (22) connects the connecting part (23) of front end of operational part (30).

Description

Pliers

Technical field

The present invention relates in a kind of treatment apparatus path that pierces into endoscope etc. to dispose the pliers of usefulness to implement affected part extraction etc.

Background technology

For in the treatment apparatus path that pierces into endoscope to implement the disposal of affected part extraction etc., used pliers.The structure of pliers is usually as shown in the patent documentation 1, is provided with support unit at the front end of the flexible flexible cord that is made of driving fit coil etc., on this support unit operating member is housed.The structure of operating member is, is made of a pair of pawl of controlling to be opened/closed, controls pawl and is driven switching by linkage.Linkage is made of a plurality of linkage components, respectively controls pawl and by the linkage component pivot suspension respectively, by the remote-control gear that is made of actuating cable, makes this linkage component action, becomes to make the linkage component action to open and close two structures of controlling pawl.

According to above structure, in case find for example certain place of suspected lesion portion of check result that endoscope produces, just will control the pliers that pawl is in closed condition and insert in the treatment apparatus path, the pawl of controlling that is arranged at its front end is given prominence to from the treatment apparatus path.Control pawl and in a single day be positioned at and corresponding positions such as affected part, control the mechanism of pawl, control pawl with unlatching with regard to controlled opening/closing.Then, the front end by will controlling pawl is in pairs contacting with body cavity or near the place, is controlling the operation of pawl direction towards closing, and implements the disposal with the sample of tissue of affected part or extraction tumor etc.

Patent documentation 1: TOHKEMY 2001-299689 communique

But, consider that pliers inserts in examinee's body and takes out under the situation of in-vivo tissue etc., can be contaminated in the use.Therefore,, use pliers repeatedly, consider also bad from the viewpoint of health even for example use afterwash.That is to say, wish once using afterwards with regard to the disposable pliers of depleted what is called for a kind of.For this reason, pliers must be able to be made at low cost.; for the pliers shown in the aforementioned patent document 1; the parts that are provided with as front end at the driving fit coil that constitutes flexible flexible cord; needing at least 2 controls pawl, supports these support units of controlling pawl, makes 2 actuating cables of controlling the rotating relatively bolster of pawl and linkage component and operating this linkage component; not only part count is many, and manufacturing cost is higher.Consider this, wish that the part count of formation pliers will be lacked.

Summary of the invention

The invention solves aforesaid technical problem, its purpose has been to provide a kind of available less part count to adopt formation pliers and the good pliers of operability.

In order to realize aforesaid purpose, pliers of the present invention is characterised in that to have fixed claw parts, movable pawl parts and functional unit; Described fixed claw parts are fixed on flexible flexible cord front end, described movable pawl parts can open and close with respect to these fixed claw parts, described functional unit is used to drive that these movable pawl parts open and close and by there is flexible elastic wire to constitute at bending direction, described movable pawl parts can be that rotate at the center with the pivot suspension pin, base end part at described movable pawl parts is being provided with connecting portion, described functional unit pierces in the described flexible flexible cord, front at described functional unit forms kink, the front end of described functional unit is fixed in the fixing hole of described connecting portion, described kink contacts with the inner face of described flexible flexible cord, and the leading section of described kink tilts towards the direction of opening described movable pawl parts from described and flexible flexible cord position contacting.

Flexible flexible cord for example can be made of driving fit coil of sleeve with flexible resin or metal wire rod etc.The fixed claw parts directly are connected with the front end of this flexible flexible cord, and the movable pawl parts can be connected with these fixed claw parts with opening and closing.At this, on any one party of fixed claw parts or movable pawl parts, be provided with pin with being integral, on the opposing party's parts, be provided with boss portion, and the movable pawl that constitutes the movable pawl parts can open and close with the fixed claw of formation fixed claw parts and is connected.Functional unit by have at bending direction flexible wire rod for example the rubber-like wire rod constitute, by with near the portion bending front end of this wire rod, can be with the movable pawl parts towards the opening direction application of force.In addition, during perseveration, in order to keep the bending shape of functional unit, this functional unit can be made of marmem.In a word, the movable pawl parts towards the opening direction application of force, carry out the action that stretches and close towards base end side by with this functional unit by functional unit.Although for the movable pawl parts are had functional unit towards the closing direction operation, this functional unit also can be used as the function of movable pawl parts towards the driving mechanism of the opening direction application of force.Thus, the part count that constitutes the fore-end of pliers can be these 3 parts of fixed claw parts, movable pawl parts and functional unit, thereby part count is less, can make at low cost.

As the operating member that is arranged on flexible flexible cord front end, constitute by fixed claw parts and movable pawl parts, the fixed claw parts are fixed to the front end of flexible flexible cord.For this reason, by these fixed claw parts are formed the cutting blade shape, when the movable pawl parts are opened, can only on body cavity walls, thrust the degree of depth of regulation.And, be provided with retainer, make when the movable pawl parts are spent the position at an angle of 90 with respect to the fixed claw parts, be held in and can not further turn round.The outstanding length of the fixed claw parts in the time of can opening with the movable pawl parts thus, is correspondingly controlled and is thrust its endoceliac degree of depth.Thus, can carry out the operation of cell collection etc. safely.

By adopting structure like this, can simplify the structure of pliers, reduce part count.

Description of drawings

Fig. 1 is the front view of the pliers of one embodiment of the invention.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the cutaway view of the X-X line of Fig. 2.

Fig. 4 is the cutaway view of the Y-Y line of Fig. 1.

Fig. 5 is the exploded view of fore-end that the pliers of the embodiment of the invention is shown.

Fig. 6 is the action specification figure that the pliers of the embodiment of the invention is shown.

The specific embodiment

Embodiments of the invention below are described with reference to the accompanying drawings.At first, Fig. 1 and Fig. 2 illustrate the structure of the fore-end of pliers.In the drawings, 1 is pliers, and this pliers 1 is applicable in the treatment apparatus path that pierces into endoscope.Pliers 1 is arranged to operating member 3 and is connected with the front end of flexible flexible cord 2.At this, flexible flexible cord 2 is made of the driving fit coil, thus for hollow and become the flexible cord that has flexible long size at bending direction.

Operating member 3 is made of a pair of tine to be opened/closed.10 for to have the fixation side tine of controlling

pawl

11, and 20 is movable side tine, have can near and leave the rotating pawl 21 of controlling of the direction of controlling pawl 11 of fixation side.And the leading section of flexible flexible cord 2 is connected with fixed claw parts 10.

Fixed claw parts 10 are, its leading section forms controls pawl 11, and pars intermedia becomes to wear the boss portion 12 of pin reach through hole 12a.In addition, the position of the base end part of fixed claw parts 10 becomes circular connecting portion 13, and the leading section of flexible flexible cord 2 is fitted in this connecting portion 13 with the length plug-in type of regulation, fixes by means such as soldering or solders.Control 11 one-tenth cup-shapeds of pawl, as shown in Figure 3, its leading section constitutes sharp keen blade part 11a.And, control pawl 11 along with tiltedly having a down dip towards the blade part 11a of front end, thus, keep higher intensity at root.In addition, form the peristome 14 of circular at the middle body at the one-tenth concavity position of controlling pawl 11.

Movable pawl parts 20 are, front end has the pawl of controlling 21, and it is bowl-shape that this controls 21 one-tenth of pawls, and partly contact with the knuckle line of controlling pawl 11.Control the parts of pawl 21, but, form the notch 21a of vertical direction and form line part in order to make leading section cut in-vivo tissue sleekly for all band circularity.In addition, the pars intermedia of movable pawl parts 20 is a pivotal bearing part 22, and base end part is a connecting portion 23.As shown in Figure 4, pivotal bearing part 22 is provided with pivot suspension pin 24 with being integral, and this pivot suspension pin 24 passes the pin reach through hole 12a on the boss portion 12 of fixed claw parts 10, can fix freely to rotate by riveting grade, thus, mount tine 10 and movable pawl parts 20.

Therefore, movable pawl parts 20 are that the center is connected with fixed claw parts 10 pivotally with pivot suspension pin 24, control pawl 11, during 21 switchings, the pivotal bearing part 22 of the boss portion 12 relative movable pawl parts 20 of these fixed claw parts 10 slides, for this reason, has the sliding surface of regulation area in axis direction formation perpendicular to pivot suspension pin 24.In addition, 25 is the peristome of controlling pawl 21 sides that is provided with peristome 14 corresponding sections of controlling pawl 11.

The connecting portion 23 that forms at the base end part of movable pawl parts 20 be the position that is connected with the leading section of functional unit 30, by this functional unit 30, controls pawl 21 by means of remote manipulation, is the center rotation with pivot suspension pin 24.Functional unit 30 is made of the rubber-like steel wire, and its front end is fixed in the fixing hole 26 of connecting portion 23, pierces into the inside of flexible flexible cord 2 from the connecting portion 13 of fixed claw parts 10.And, form the 1st kink 30a in the front end vicinity of functional unit 30, and forming the 2nd kink 30b near the front end place, form the 3rd kink 30c at leading section in addition.At this, the angle of the 1st kink 30a in the functional unit 30 becomes the obtuse angle, the 2nd kink 30b that also is in front than the 1st kink 30a is 90 ° of the axis direction general curved that is parallel to pivot suspension pin 24, and the 3rd kink 30c is perpendicular to 90 ° of the axis direction general curved of pivot suspension pin 24.And, between the 2nd kink 30b to the 3 kink 30c being insertion section to fixing hole 26, from the front position of the 3rd kink 30c as preventing to work from the removal stop section that fixing hole 26 is deviate from.

The 1st kink 30a in the functional unit 30 is the position of carrying out the opening and closing operations of movable pawl parts 20, only with functional unit 30 in movable pawl parts 20 connecting portion 23 link position apart from the length of regulation be formed on the position of base end side.And the link position of connecting portion 23 in movable pawl parts 20 of functional unit 30 is with respect to the centrage A (Fig. 1) of the centre of gyration position of containing pivot suspension pin 24, in the amount of the direction biasing D that opens movable pawl parts 20.The 1st kink 30a contacts with the inner face of flexible flexible cord 2 usually, and from this contact position, leading section is towards the direction inclination (with reference to Fig. 3 and Fig. 6) of opening movable pawl parts 20.Therefore, under the state of inside one side of functional unit 30 being drawn in flexible flexible cord 2, movable pawl parts 20 remain on this and control the closed condition that pawl 21 engages with flexible flexible cord 11, but in case release the operation of functional unit 30, movable pawl parts 20 are center steering with pivot suspension pin 24 just, open thereby control pawl 21.

Functional unit 30 leads to the inside of the connecting portion 13 the fixed claw parts 10 from the inside of flexible flexible cord 2, between the boss portion 12 by these fixed claw parts 10 and the pivotal bearing part 22 of movable pawl parts 20, from the 2nd kink 30b, fixing hole 26 is passed at the position of front from the inboard, and will be from towards perpendicular to the 3rd kink 30c of the direction bending of the 2nd kink 30b position to front end, derive from fixing hole 26, brought into play the anti-avulsion function that prevents that functional unit 30 from coming off from movable pawl parts 20.And, for the 3rd kink 30c of the functional unit 30 that connects fixing hole 26 and will derive at the exterior side of movable pawl parts 20 position to front end, not outstanding from the outside of movable pawl parts 20, around fixing hole 26, form the recess 27 of the degree of depth more than or equal to the diameter of functional unit 30.

As above-mentioned, movable pawl parts 20 are that relative fixed tine 10 carries out on-off action, but shown in the imaginary line of Fig. 1, and as shown in Figure 6 described later, the maximum opening of movable pawl parts 20 relative fixed tines 10 roughly becomes 90 °, and movable pawl parts 20 can not opened more than the approximate vertical state by relative fixed tine 10.At this, fixed claw parts 10 and fixed claw parts 20 are, make their parts that

pawl

11,21 contacts up and down and leaves of controlling, and to this, boss portion 12 and connecting portion 13 engage with pivotal bearing part 22 and connecting portion about 23.Therefore, when movable pawl parts 20 were center steering with pivot suspension pin 24, pivotal bearing part 22 can contact with the side extension towards controlling pawl 11 of fixed claw parts 10, can not further turn round.So, set for, when the end wall 11b that controls pawl 11 contacted with the lower face 22a of pivotal bearing part 22, movable pawl parts 20 roughly became vertical angle state with regard to relative fixed tine 11.

The pliers 1 of above-mentioned formation as its component parts by flexible flexible cord 2, as shown in Figure 5 the fixed claw parts 10 of fixation side and 3 parts constituting of the movable pawl parts 20 of movable side, functional unit 30 that its on-off action of remote control is used.Therefore, the part count of this pliers 1 is considerably less, assemble also simple, thereby can make pliers 1 at low cost.

So, simple structure not only, and when taking histiocyte, can bring into play higher ability.When in the treatment apparatus path that pliers 1 is inserted endoscope,, the 1st kink 30a of this functional unit 30 is retreated by stretched operation parts 30.Thus, the pawl 21 of controlling of movable pawl parts 20 contacts with controlling pawl 11, controls

pawl

11,21 and is in closed condition, and pliers 1 is advanced in the treatment apparatus path swimmingly.Then, make the length of pliers 1 from the outstanding regulation of front end opening of treatment apparatus path.

When the leading section of pliers 1 exports in the body cavity, state to Fig. 6 direction arrow F shown in of functional unit 30 from Fig. 3 promoted.Thus, be arranged on the 1st kink 30a forward end side shifting on this functional unit 30, just promote the movable pawl parts 20 that are connected with its front end, and be center steering with pivot suspension pin 24.As a result, the controlling between the pawl 11 of pawl 21 and fixed claw parts 10 of controlling of movable pawl parts 20 becomes opening.

So, in body cavity walls, the leading section of pliers 1 is faced mutually with the position that becomes the tissue that will extract, is made flexible flexible cord 2 shown in the arrow P of Fig. 6, from the treatment apparatus path to releasing the direction displacement.Become sharp keen blade part 11a owing to control the front end of pawl 11, so this blade part 11a can cut in the tissue.Although it is sharp keen to control the front of pawl 11, increase continuously towards base end side thickness, therefore, can carry out swimmingly towards the incision of its body cavity walls, this is controlled pawl 11 and has higher intensity, can not damage.At this, because movable pawl parts 20 relative fixed tines 10 become the state of approximate vertical, therefore, the penetraction depth of controlling pawl 11 is limited to up to these movable pawl parts 20 and body cavity walls position contacting promptly controls the position that pawl 11 is given prominence to.Therefore, control pawl 11 and can not be inserted into putting of body cavity walls by mistake, can not make damaged in the body than deep-seated.

So, control in the pawl 11 incision body cavitys, during movable pawl 20 becomes with body cavity walls is faced mutually state, carry out, and draw in operation in the flexible flexible cord 2 to arrow B direction pulling process parts 30.As a result, movable pawl parts 20 are the center with pivot suspension pin 24, turn round to arrow R direction.At this, although the pawl 21 of controlling of movable pawl parts 20 all becomes curve form,, and form collinear blade tip because of leading section is provided with notch part 21a, thus the controlling pawl 21 and can nip smooth and easy and reliably in the tissue of this movable pawl parts 20.As a result, control pawl 21 revolutions, contact with the pawl 11 of controlling of the fixed claw parts 10 that thrust body cavity walls.Thus, cut off the tissue of ormal weight, enter and control between the pawl 11,21.Therefore,, extract flexible flexible cord 2 by closing under this state of controlling

pawl

11,21, but acquisition volume inner tissue.

Claims

1. a pliers is characterized in that, has fixed claw parts, movable pawl parts and functional unit; Described fixed claw parts are fixed on flexible flexible cord front end, and described movable pawl parts can open and close with respect to these fixed claw parts, and described functional unit is used to drive that these movable pawl parts open and close and by there being flexible elastic wire to constitute at bending direction,

Described movable pawl parts can be that rotate at the center with the pivot suspension pin, at the base end part of described movable pawl parts connecting portion are being set,

Described functional unit pierces in the described flexible flexible cord, and at the front formation kink of described functional unit, the front end of described functional unit is fixed in the fixing hole of described connecting portion,

Described kink contacts with the inner face of described flexible flexible cord, and the leading section of described kink tilts towards the direction of opening described movable pawl parts from described and flexible flexible cord position contacting.

2. according to the described pliers of claim 1, it is characterized in that, described movable pawl parts are connected with described fixed claw parts pivotally by gyroaxis, the connecting portion of described functional unit and described movable pawl parts near the base end side that the position is set of described gyroaxis, with respect to the position of the axis that comprises this centre of gyration towards the biasing of gyratory directions the place ahead, described kink from this connecting portion towards the direction extension that intersects with described axis.

3. according to the described pliers of claim 2, it is characterized in that it is maximum opening that described movable pawl component limitations becomes the state of described relatively fixed claw parts approximate vertical.

4. according to the described pliers of claim 1, it is characterized in that, be provided with the blade part that can thrust in the body cavity walls at the leading section of described fixed claw parts.