DE2919271C2 - Surgical instrument, in particular for medical-technical use - Google Patents

Description

The invention relates to a forceps instrument, which is used in particular for medical-technical use serves and consists of two handle plates connected by means of band springs with hinge, which at the front end has a Have tweezers, scissors or some other grasping or holding instrument.

Such forceps instruments, which, if they carry small scissors instead of the forceps, can also be used as scissor instruments can be referred to are generally constructed so that the handle part or the handle plate and the spring consist of one piece, with the two springs at the rear end either via a Hinge, a joint, consisting of a slotted tube, or by pushing through the spring ends are connected to each other. Such instruments have also become known in which the springs in the Handle part or are firmly inserted in the handle plate and, for example, by spot welding with the handle part are connected.

The known instruments, provided they consist of one piece, have the disadvantage that the spring strength, even with the most modern production facilities, turn out differently, so that the applicable Pressure when closing the instrument differs from instrument to instrument. Especially with microsurgical Working this is very disadvantageous because such work is very sensitive and when viewed must be carried out under the microscope.

In the case of instruments with inserted springs, the material thickness can be precisely determined. However, corrosion can occur at the point where the springs are inserted. Besides, it is not possible. Springs with different strengths, which are needed for different jobs, for example can be used subsequently.

Finally, the repair on the spring part can only be carried out with difficulty, since the springs are not released can be, especially with regard to the precisely executed and therefore very expensive front part of the instrument is disadvantageous.

The present invention is therefore the object

ίο based on the aforementioned disadvantages of the known Avoiding instruments and creating an instrument with which picht only a constant spring strength can be guaranteed, but where it is possible to use any springs and against each other to exchange.

To solve the problem, a forceps instrument of the type mentioned is proposed, which is characterized in that the springs are interchangeably arranged in the handle parts or grip plates, and that the spring ends are bent L-shaped and milled in the handle parts or grip plates engage and be held in place by screws.
According to a further embodiment of the invention, at least one screw can be provided on the inside with a protruding pin which serves as a stop.

Since the above-mentioned types of joints of the instrument are unstable due to relatively large tolerances and since lateral pressure is applied when closing the instrument, the entire load rests on the anterior screw in the joint area, such an instrument very quickly loses its longitudinal stability. In order to ensure a constant spring strength and thus the same pressure and that To improve the instrument in terms of its longitudinal stability, according to a development of the invention suggested the joint for the connection of the two ribbon springs at the rear ends with Execute an optionally longitudinally slid sleeve, in the middle of which a pin or a screw is inserted is. The pin or screw serves as a fulcrum for the two extensions bent at right angles at the end of each spring by having the pin penetrate these two ends, creating an additional Stabilization of the joint and thus absolute longitudinal stability is achieved.

The subject matter of the invention is intended to be based on the drawing using the example of a preferred embodiment are explained in more detail. In the drawing shows

1 is a perspective view of a forceps instrument according to the invention,

Fig. 2 shows an enlarged detail of a handle part or a grip plate with inserted spring.

Fig. 3 shows an exploded view of the joint for connecting the two springs in an enlarged Scale.

As can be seen from the drawing, there is the forceps instrument from two handle parts or handle plates 1 and 2, which are on the front in two tweezer legs 3 and 4 expire. Of course, you can use small scissors instead of the tweezers or some other gripping or holding device can be attached.

The two handle parts or handle plates I, 2 are on rear end over two leaf springs 5, 6 over one with 7 designated joint connected to each other.

As can be seen in particular from FIGS.

have the two handle parts 1,2 in the area of the rear End a paragraph 8, which is about the width of the spring

5 or 6 corresponds.

Furthermore, each spring 5 or 6 is L-shaped to the outside down. What creates a tab 9 This lase marriage 9 engages in a slot-like milled recess 10 in the handle part or in the handle plate 1 or 2. Each leaf spring 5,

6 is provided with a hole through which a screw II penetrates into a corresponding threaded hole is screwed into the handle part 1 or 2.

At least one screw can have a protruding pin 12 as a stop in order to compress it the two handle parts or handle plates 1, 2 to limit.

As can be seen in particular from FIG. 3 in conjunction with FIG. 1 results, the joint consists of a round sleeve 13, which has an inner bore 14 and optionally a slot 15. Through the inner hole 14 a pin or a screw 16 can be inserted.

In order to produce the articulated connection, the leaf springs 5, 6 are widened at the two rear ends 17 and 18 are provided, which are bent at right angles and the front ends Ϊ9 and 20, respectively of the two springs survive. Furthermore, the widenings 17 and 18 are rounded and have holes 21 and 22 respectively.

To assemble the joint, the sleeve 13 is so in the angled widenings of the ends of the two springs 5,6 inserted that the pin i6 the holes 21, 22 and the bore 14 of the sleeve 13 penetrates.

Such a design gives the joint an additional stability, whereby the absolute Longitudinal stability of the entire instrument is guaranteed.

Of course, the pin 16 can also increase a corresponding screw or rivet can be provided.

1 sheet of drawings

50

60

Claims (3)

Patent claims: 1. Forceps instrument, especially the medical-technical Is used and consists of two grip plates connected by means of band springs with hinges, which have tweezers at the front end, have scissors or some other grasping or holding instrument, characterized in that that the springs (5,6) are arranged interchangeably in the handle parts or handle plates (1, 2) are, and that the spring ends (9) are bent L-shaped and in millings (10) in the handle parts or grip plates (1, 2) engage so / ie are held on by screws (11). 2. Forceps instrument according to claim 1, characterized in that at least one screw (11) is provided with a protruding pin (12) as a stop 3. Forceps instrument according to claim 1 or 2, characterized in that the joint (7) for the connection of the two ribbon springs at the rear ends of an optionally provided with a slot (15) sleeve (13) with a through hole (14) , in which a pin (16) serving as a fulcrum or a screw is inserted, which or soft the at right angles bent, provided with bores (21 or 22) and rounded widenings (17, 18) at the ends of the springs in such a way penetrates that the sleeve (13) between the angled widening part? or 18) to lie kt> mmt.