DE9304003U1 - Medical endoscopic instruments with sliding mechanisms for opening and closing the jaw parts, in particular designed as tubular shaft instruments for surgical instruments for endoscopic intervention - Google Patents

Description

Description

In the jaw elements contained in the designated instrument, a cavity is formed as an actuating rod, to the tip of which a pair of jaws are attached by brazing or the like and are usually used together with simple joints, hinges or hinges arranged in opposite directions.

The known instruments in known technology, due to the mentioned joints and pins, in practical cases, have the risk of losing such parts in secondary sections, intermediate areas (in the case of surgery), which can cause obvious disruptive effects on the jaw parts.

The invention is based on the object of reliably avoiding the aforementioned disturbances and consequently preventing the treatment part from being damaged or broken even when excessive forces are applied.

This object is achieved according to the invention according to the generic term of the claim. In contrast to the state of the art in conventional systems using so-called joints, the innovation is that the force control transmission for opening or closing is achieved by the jaw parts being connected by a

t>!PLOMPKY£IKER DR. fiER.KÄT.RICHARD B IERL.... Patent Attorney Sonnenweg 2 - Kralei-HirerebensteUe -&Tgr;&Igr;&eegr;$&Egr;&idigr;&pgr;&iacgr;&Igr;&khgr;.·&Kgr; - \&idiagr;'$ TJ-cfcsftflgeji *&idigr; eis REPRESENTATIVE

⁶ · ·.. .· .. .· at the European PelenlBmi

.·■' D-BDOD Munich

Ref. No. G 93 o4 oo3.2 - "Rohrschaf-Note: W. Eisold, ... - Page 2

axial division of the sleeve in the direction of the working ends of the jaws, whereby the closing pressure is achieved exclusively by friction. So-called clutches, which cause the mentioned disturbances through sources of disturbance, are therefore excluded from the outset.

Further special features or additions are the subject of the subclaim. The following examples are explained using the drawings, which show:

Fig.l: Longitudinal section of the locking mechanism for tubular shaft instruments with open jaw,

Fig.IA: Do. but with closed jaw, Fig.2: Sliding sleeve in longitudinal section,

Fig.3: Jaws with open opposing biopsy jaws, e.g. a clip-applying forceps,

Fig.3A. Cross section through sliding sleeve, Fig.3B: Do. through jaw part holder,

The closing mechanism in Fig.l is assigned the cavity with shaft and free end '2' against the sliding sleeve '3' with jaw parts '4' and associated receptacle '5', e.g. a cliff position pliers to the internal rod '6'. By means of the latter, the sliding sleeve '3' can be moved from the stop position '7' with opened jaw parts '8/9' by moving the sleeve head ^{110 1} away from its connection position ¹¹¹ to the abutment ^{121 of} the then closed biop-maup part (Fig.3). The sliding sleeve '3' (cross-

DIPLOMPHYSIKER DR. RER. NAT. RhCHAJICIiHERf. ···; Patent Attorney Sonnenweg 2 - Office HiranabsteUe -Tlnirgtefs.jS - 7ZU tcessingai &Iacgr;.* eis; REPRESENTATIVE admitted

at the European Palentami D-8000 Munich

Akt.Zech. G 93 o4 oo3.2 \ "Rohrschaf-Anm.r'W. Eiseid, ... Page 3

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section Fig.3a) from one to the other without the jaw part elements '8/9' having to be displaced in their longitudinal direction, but the displacement is limited exclusively to the receptacle '5', i.e. to the opening '13' of the jaw part elements in the transverse direction '14' (Fig. 3B) without affecting the longitudinal direction of the jaw part elements.

Stops sirid for the sleeve and for the shaft system '15', and for the sleeve concerning the stops and the grooves, receptacles are for fixing the stops.

Claims (2)

DIPLOMPKYSIKERDR-RER-NAXeJCKARDJeIERL «... Patent Attorney Sonnenwee 2 - Karizlei-HironebensteUe -Tlnir&rätr.fc - 7258iTr»ssinpeii.l": ei&REPRESENTATIVE admitted ^&Lgr; · ·· ··· ·· ^e · ·· at the European PBlentaml D-8000 Munich ^x ü k Sep. 1991 Current number: G 93 o4 oo3. 2 tubular shaft Note: W. Eisold, 72ol Baldheim 'Page 4 Medical endoscopic instruments with sliding mechanism « Claim for protection With a tube (11) as actuating pull rod (12) for sliding mechanism for opening and closing the jaw parts (13), in particular as tubular shaft instruments (14) for endoscopic interventions of shaped spring elements (15) or segment-like cutting blades (16) which are attached to outer ends (17) of the holding elements (18), characterized, that the force transmission is arranged to open or close the jaw part (19) concentrically in the rigid tube (11) by the axial behavior along the tube shaft (14), whereby the actuation of the sliding mechanism (20) of the sliding pressure by period change, the closing takes place exclusively via friction (21), whereby, for example, the aforementioned clip-position pliers (22) are held and the tube positioning (23) is also held and the same-sided closing is made possible by the jaw parts being received in pairs, depending on the depth, more or less deeply by the sleeve, thereby clamped and closed without the jaw parts being locally displaced in their overall receiving position. . ·