JPH0197447A - Bullet forceps or pincette - Google Patents

Abstract

PURPOSE: To make manufacture simple and low in cost and to enable the adaptation to diversified applications by forming pincettes of two molded parts which include a closed zone and are longitudinally divided over the entire part. CONSTITUTION: The pincettes 10 are composed of the two molded parts 11, 11a which are longitudinally divided over the entire part inclusive of the closed zone 18. The respective inside surfaces are joined in pressurized contact with each other and are integrated, by which the pincettes are formed. Then, the parting plane 19 thereof eventually exists in pincette arms 12 as well. The respective molded parts 11, 11a are plastic and are moldable by the same molds. The manufacture and maintenance are thus easy. Further, the longitudinal grooves 26 passing the inside of the pincette arms 12 are easily formable so as to pass the entire part of the pincettes 10 in both molded parts 11, 11a by halving these grooves. The insertion of strands consisting of conductive materials into these grooves 26 and the formation of grip pointed ends 14 at one end and contact pins 40 at the other ends are possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to spring forceps or forceps, in particular coagulation forceps, in which two forceps arms emanating from a common closed zone are used. and a gripping element, each of the tweezers arms forming a space that advantageously tapers away from the gripping end in its inactive position and can be guided toward each other in a resilient manner. .

(Prior Art) Tweezers of this type are instruments equipped with elastic arms for gripping and holding objects, and are used particularly in the fields of surgery and dentistry, such as for dissection. Tweezers are provided with corrugated grooves, surgical tweezers are provided with teeth, and tweezers for removing foreign objects are provided with thin tips. In this case, there is a so-called "coagulation tweezers" which has a special shape, and an electric current is passed through the tip of the tweezers.

These tweezers generally consist of elastic metal front pieces that are overlapped and welded or riveted to one another in the area of the tweezers section, which is referred to as a closed zone.

(Problems to be Solved by the Invention) Based on the known state of the art, it is an object of the present invention to improve the snapping forceps or tweezers of the type mentioned at the beginning so that they can be manufactured easily and at low cost. One of the important tasks of the present invention is to provide disposable tweezers, which can be carried out at low cost and enable the produced tweezers to be used in a wide variety of applications. .

MEANS FOR SOLVING THE PROBLEM According to the measures of the invention proposed to achieve this object, the tweezers consist of at least two molded parts that divide their closed zone in the longitudinal direction. and are connected to each other in such a way that the inner surfaces of these two molded parts are in contact with each other, in which case, according to another feature of the invention, the tweezers are divided along their longitudinal axis and each molded part is It has one half of both tweezers arms. The dividing plane therefore extends inside the tweezers arms and not in the slit-like space between the two tweezers arms as in the prior art.

(Functions and Effects of the Invention) Each molding part is constructed identically in a particularly advantageous manner, so that its manufacture and storage can be carried out easily. What has proven particularly advantageous in the present invention is that the individual forceps halves are first fabricated from plastic, and then both forceps halves are joined to each other so that the entire forceps are reciprocated. The point is that the longitudinal groove running through the tweezers arm is formed as a passageway in the finished tweezers.

These channels of the invention allow measures such as fitting or converting the free end of the tweezers arm with a special gripping point, thereby significantly increasing its applicability.

Another advantage of the tweezers according to the invention is that, for example in the case of coagulation tweezers, the lead wires connecting to the grip ends can be guided without difficulty into the channels formed by the longitudinal grooves, and in a particularly advantageous embodiment: It is possible to extend this conducting wire to the insertion pin and to fix the insertion pin itself in this passage. Indeed, according to the invention it is also possible to insert strands of electrically conductive material into these channels, forming at one end a gripping point and at the other end a contact pin.

It is clear that the configuration of the tweezers halves according to the invention makes it possible to produce highly versatile and reasonably different tweezers, as a result of which the amount of tweezers stored is small and the assembly operation is simplified.

Important for this ease of assembly is the presence of a pin protruding from the forceps halves, which has a mirror-symmetrical blind hole with a corresponding cross section on the opposite side of the forceps longitudinal axis. and when assembling the two forceps halves, these parts telescopingly engage one another, allowing rapid centering between the two forceps halves; Depending on the situation, it is even possible to achieve fixed retention of both.

Indeed, the special manner of guiding the tweezers arms during the gripping operation, that is to say the guiding of each tweezers arm in the mutually approaching direction, also belongs to the scope of the invention. What is in question here is at least one pair of integral moldings formed in each arm half of the tweezers, such integral moldings advantageously extending from each tweezers arm into a slit-like space. In this case, during the grip operation described above, the inner surface of one integrally molded part slides along the inner surface of the other integrally molded part, providing accurate guidance when closing the mouth of the tweezers. . Indeed, in this case, based on the fact that each tweezers halves are constructed identically to each other, it is also important that the pairs of integrally molded parts on each tweezers side are located in such a way that they present an inside-out mirror image of each other;
This significantly improves the guiding properties.

The gripping element held by the surgeon or other user consists in the invention of radial partial ring-shaped ribs, which each form a ring when the mouth of the forceps is closed. These partial ring-shaped ribs are produced by cutting circumferential grooves in the tweezers arms, and the rib surfaces are roughened by integrally molded parts.

A simple disposable device is provided which has the advantages outlined above.

Embodiments The invention will now be described in detail with reference to embodiments of the type shown in the accompanying drawings.

For example, a tweezers (10) having a length dimension (a) of 150 mm can be produced by two identically shaped tweezers halves (11), ( 11a). The combined height dimension (h) of these tweezers halves (11) and (11a) is approximately 8 mm. Tweezers (10)
Of the above-mentioned total length (a), about 10 mm is the grip tip (1) inserted into the tweezers arm (12).
4) is occupied by the overhang length (b).

Each tweezers half (11), (11a) has a closed zone (I8) starting from the end face (16) exhibiting a -11= fan-like expansion (15) and having a length of approximately 60 mm. At this zone (18), designed with dimension (i), the strip-like space (20) formed between each tweezers arm (I2) ends. This space (2o) is located at the front end of the tweezers arm (12) (
24), and the slit line or tweezers arm line (21) reaches the deepest part of the slit (22), where it forms an acute taper angle (W). This taper angle (W) is determined by the two longitudinal grooves (
26) are larger than the angle (1) which structurally limits them from each other. In other words, what this means is that the tweezers arm line (21) is located at a distance (q
) to form an inner groove wall (27), and at the front end (24) it runs straight along, and in this case very thin, the groove wall (27). In other words, it extends over the vertical groove (26).

From the deepest part of the slit (22), the distance (e) is approximately 16 mm in this case, and the length exceeds 30 mm (
f) the gripping zone (30) begins, the part-ring rib (32) cut with knurls (33) giving rise to an integral molding of triangular cross-section raised by the circumferential groove (31). There is.

As is clear from FIG. 3, at the end of the gripping zone (30) closer to the tip of the tweezers, each tweezers arm (12) has a knob-shaped integral molding (36) projecting into a respective slit (20). ) (36n), and the integrally molded parts (36), (36n) are arranged offset from each other in the direction of the tweezers center axis (M). The inner surface (37) of one integrally molded part (36) on the side facing the tweezers center axis (M) is located at the grip position shown in FIG.
are pressed together, the other integrally molded part (36
n) is in contact with the adjacent inner surface (37n). This mutual contact of the pairs of integral moldings (36/36 n ) ensures a very precise guiding action of the tweezers arm during the gripping operation.

In fact, one pin (38) protrudes from the inner surface (19) of the tweezers half body on the outside of the tweezers central axis (M), and on the other side of the central axis (M), a corresponding blind hole is formed. (39) are located mirror-symmetrically facing this pin (38), and each tweezers half body (11), (
When the two halves are assembled together, the pin (38) provided in one half will fit into the blind hole (38) formed in the other half.
9) Engage inside. In this case, the vertical grooves (26) complement each other to form a passage.

Tweezers (
10) is an obvious fact that needs no explanation. The important point in this case is that the grip tip (14) is seated non-rotatably in the longitudinal groove (26), and this can be done by using a tip with a polygonal cross-sectional shape or by This is achieved by forming an appropriate recessed part or a convex step in the longitudinal groove (26), and forming a corresponding convex step or recess in the tip.

The illustrated tweezers (1) used as coagulation tweezers
0), the grip tip (14) is connected to an electrical cable, which is connected to the channel (26).
) and extends, for example, to the insertion pin (40). Note that this insertion pin (40) itself is fixed within the passageway (26). In a special embodiment, it is also possible for each gripping point (14) to be constructed as part of a bar made of electrically conductive material, which bar is inserted into the channel (26) and whose end is inserted into the plug. It is formed as a bottle (40).

Note that when the tweezers (10) according to the present invention are used as disposable surgical tweezers, the above-mentioned electrical equipment is naturally unnecessary.

[Brief explanation of the drawing]

=15- Fig. 1 is a plan view of the tweezers consisting of two tweezers halves, Fig. 2 is a side view of the tweezers of Fig. 1 in the inactive position, and Fig. 3 is a side view of the tweezers of Fig. 2 in the gripping position. Figure 4 is a side view of the tweezers, Figure 4 is a diagram showing the state of the tweezers' half-divided body, Figure 5 is an enlarged sectional view taken along the line v--■ in Figure 3, and Figure 6 is the arrow vi force direction in Figure 2. The rear view shown in Figure 7 is the arrow vi in Figure 2.
FIG. 8 is a front view as seen in the i direction, FIG. 8 is a front view as seen in the direction of arrow vii in FIG. 4, and FIG. 9 is a perspective view showing a part of the tweezers separated. (List of codes) 10... Tweezers, 11, 11a... Tweezers half body, I2... Tweezers arm, 14... Point end, 15... Expanded part, 16... End surface, 18 ... Closed zone, 19 ... Inner surface of half body, 20 ... Slit-like space, 21 ... Slit line or tweezers arm line, 22 ... Deepest part of slit, 24 ... Tweezers arm =16- Front end, 26... Vertical groove, 27... Groove surrounding wall, 30...
・Grip zone, 31... Circumferential groove, 32... Partial ring-shaped rib, 33... Knurling, 36.36
n...-Body forming part, 37.37n...Inner surface, 38.
... Pin, 39 ... Blind hole, 40 ... Insertion pin, 42
... Contact element, 1 ... Tweezers length, b ... Overhang length, e ... Distance from the deepest part of the slit to the grip zone start point, p ... Grip zone length, h.
...Tweezers height, i...Length of closed zone, q
...Distance from the tweezers arm line to the adjacent vertical groove, t
... Angle between both grooves, W ... Taper angle, M ... Tweezers center axis.

Claims (1)

Claims: (1) A rebound forceps or forceps, in particular a coagulation forceps, comprising two forceps arms extending from a common closed zone and a gripping element, each forceps arm in each case have one free gripping end, form a slit-like space, and can be guided toward each other in a spring-elastic manner, the tweezers (10) have a closed zone (18). It is composed of at least two molded parts (11) and (11a) divided in the longitudinal direction, and these molded parts (11)
) and (11a), each inner surface (19) is connected so that they can touch each other. (2) The tweezers (10) are divided along the longitudinal axis (M), and each molded part (11), (11a) has two parts.
Percussion forceps or tweezers according to claim 1, characterized in that they each have one half of a book tweezers arm (12). (3) The molded portions (11) and (11a) are formed equally to each other.
The triggering forceps or tweezers described in item 1) or item (2). (4) The bullet according to any one of claims (1) to (3), characterized in that each molded part (11), (11a) is made of plastic. forceps or tweezers. (5) One vertical groove (26) is cut in each of the tweezers arms (12) of each of the molded half halves (11) and (11a), and these vertical grooves (26) are connected to the tweezers (10).
The percussion forceps or tweezers according to any one of claims (1) to (4), characterized in that both end faces (16) and (24) of the clip are open. (6) The longitudinal groove (26) of each molded part (11), (11a) is configured as an at least partially covered channel. Bullet forceps or tweezers as described in . (7) One conductive strand is disposed within the vertical groove (26), and one end of this strand is connected to the grip tip (
14), and the other end protrudes from the snapping forceps (10) as an insertion pin (40), respectively. Both are the triggering forceps or tweezers described in item 1. (8) The triggering forceps or tweezers according to claim (5) or (6) above, in which a slit-like space that tapers from the grip end in the inactive position is provided. Percussion forceps or tweezers characterized in that the two longitudinal grooves (26) form a larger angle (t) than the taper angle in the slit-like space (20). (9) At least the longitudinal groove (
Claims (1) to (8) above, characterized in that the cross section of (26) has at least one corner portion and/or a concave or convex molded portion. The triggering forceps or tweezers according to at least item 1 above. (10) The thickness dimension (q) of the groove surrounding wall (27) located between the tweezers arm green (21) and the vertical groove (26) decreases toward the grip end (24) of the tweezers arm (12). The percussion forceps or tweezers according to at least one of the claims (1) to (9). (11) Tweezers arm (
12), at least one pair of integrally molded parts (36), (3
6n) protrudes into the slit-like space (20), and in this case, these integrally molded parts (36), (36n
) are adjacent to each other or interlock with each other in the closed use position of the forceps arm, according to at least one of claims 1 to 10. Or tweezers. (12) Each inner surface (3
7) and (37n) are located facing each other, the percussion forceps or tweezers according to claim (11). (13) At least one pin (38) or something similar protrudes from the inner surface (19) of the molded part (11), (11a), and borders the tweezers longitudinal axis (M) in mirror symmetry with this pin. Claims (1) to (12) characterized in that a blind hole (39) having a cross section corresponding to the pin is assigned to the opposite side thereof. Both are the triggering forceps or tweezers described in item 1. (14) Each tweezers arm (12) is provided with a gripping element formed as a part-ring-shaped rib (32) with a modified surface (33). The snapping forceps or tweezers according to at least one of items 1) to (13). (15) A separate grip tip (14
) is inserted non-rotatably, according to at least one of the claims (1) to (6) or (8) to (14). bullet forceps or tweezers. (16) An electrical contact element (16) electrically connected to the grip tip (14) in the longitudinal groove (26) or corresponding passageway at the end opposite to the tip of the tweezers (10). 42) is inserted, the snapping forceps or tweezers according to at least one of the claims (1) to (15).