WO2016078750A2

WO2016078750A2 - Tongs

Info

Publication number: WO2016078750A2
Application number: PCT/EP2015/002231
Authority: WO
Inventors: Thanh-Ha Clarenbach; Ralf Scheel
Original assignee: Heinrich-Heine-Universität Düsseldorf
Priority date: 2014-11-18
Filing date: 2015-11-06
Publication date: 2016-05-26
Also published as: WO2016078750A3; DE102014016965A1

Abstract

The invention relates to tongs comprising a first and a second tong part (1,2) with respectively a handle area (G1, G2) and a head area (K1, K2), the tong parts (1, 2) being connected by a joint (3) between said areas and can pivot which respect to each other about a joint axis (A). Each head area (K1, K2) comprises an angled active element (W1, W2), the first active element (W1) of the first tong part (1) can be positioned in a position which is opposite to the second active element (W2) of the second tong part (2) on one side of the second active element (W2). At least the head area of one of the tong parts, in particular both tong parts, can be moved with respect to the other tong part perpendicular to the joint axis, in particular in the joint, and the first active element (W1) can be moved about the second active element (W2) to move into a second position which is opposite the second active element (W2) on the other side of the second active element (W2).

Description

tongs

The invention relates to a pair of pliers comprising a first and a second pliers part, each having a gripping region and a head region, wherein the pliers parts are connected by a hinge and pivotable about a hinge axis against each other and each head portion has an angled active element, wherein the first active element of the first pliers part is positionable in a counter-position to the second active element of the second pliers part on one side of the second active element.

Such pliers with angled active elements, which are also referred to as cranked, in which therefore the active elements extend out of a plane which is oriented perpendicular to the hinge axis or the longitudinal extension direction intersects such a plane, are known in the prior art in various designs. These various designs result essentially from different constructions of the respective active elements, which can be designed in the simplest case as aufeinanderzubewegbare jaws, for example, to take objects with the pliers.

The present invention particularly relates to such tongs

Active elements which are provided to effect a function of the shape of the object when acting on an object. A typical one

Application to which the invention described herein particularly relates relates to wire bending pliers with which the forceps are applied to a wire solely by the application of force to the active elements (i.e., without the user repositioning the hinge axis of the forceps in space)

Move the active elements towards each other, a wire bends and this z. B. the

CONFIRMATION COPY Wire is provided with a kink or with a larger radius. A

Application is e.g. given in orthodontics.

The function of such active elements is usually such that when

Closing the pliers, that is, when the active elements are moved toward each other, a lying between the active elements wire is bent or angled in a very specific direction. This results from the fact that in such

Drahtbiegezangen the two cooperating active elements of the two pliers parts are formed differently in shape, as otherwise z. B. with pliers is the case that should exercise a gripping function. For example, presses at one

Wire bending pliers an active element the wire into a recess of the other active element.

Accordingly, with such a pair of pliers of the known state of the art with in particular non-conforming shaped active elements only a deformation of an object in a certain direction, z. B. a wire bend in a certain direction are made so that at a desired

Change in shape in a different direction, in particular so to achieve a wire bend in a different direction, a correspondingly differently designed pliers must be used, usually a mirror-image-shaped pliers.

In particular, in the field of wire bending, such as in the orthodontic area, accordingly, a treating physician must use at least two in principle equal, but mirror-image constructed pliers to make wire bends in opposite directions in the oral cavity of a patient can.

It is against this background, an object of the invention to develop a pair of pliers of the type mentioned in such a way that with one and the same pliers different functions, in particular mirror images of each other

Subject to exercise, in particular in the field of Wire bending, bends in two opposite directions can be performed with one and the same pliers.

According to the invention, this object is achieved in that at least the

Head portion of the pliers against the handle portion of this pliers part and against the other pliers part perpendicular to the hinge axis is displaceable or preferably both the entire pliers against each other perpendicular to

Joint axis are displaced, especially in the joint, and by this

Slidability, the first active element around the second active element around in a second opposing position to the second active element on the other side of the second active element is movable.

Thus, it is therefore an essential aspect of the invention that in a first opposing position between the first and second active element, a first function can be exercised with the two active elements moving towards each other and in a second counter-layer a second function is carried out on a movement of the two active elements towards each other can be, in particular in the field of wire bending, depending on the selected counter-deflection in one direction or another direction is possible.

If one regards, for example, one of the two pliers parts, for example the second pliers part, as stationary, then the first possible counter-overlay means that the first active element acts on the second active element during a rotation of the first

Zangenteiles counterclockwise can be moved and in the second counter-overlay that the first active element can be moved to the second active element upon rotation of the first pliers part in a clockwise direction.

A change between the two counter-overlays according to the invention is possible in that the first active element is guided around the second active element, which by the displaceability of at least the head portion of the pliers parts relative to the other and preferably by the displaceability of the entire pliers parts to each other, in particular in the joint and in particular it goes back to that by shifting the radius of the

Circular path movement, which carries out the first active element of the first pliers part in a pivoting of the handle element, can be changed by this shift, so there is a position of the first active element, the by

Displacement can be achieved perpendicular to the hinge axis, in which the radius of the circular path is so large that the first active element can be guided around the standing to the hinge axis in a smaller radius position second active element.

A respective opposing position of the active elements can be effected by moving the first active element about the second to one side or the other by reducing the radius of the circular path movement by displacing at least the head region, preferably the entire first tong part, so that in such a In the case of a pliers part movement, in particular when the active elements are moved toward one another, the first active element is no longer guided past the second, but rather into a, in particular contacting, one

Opposite, in which an object, z. B. a wire to be deformed, is taken between the active elements.

Thus, with respect to the application of wire bending, especially in orthodontics, in one of the two possible counterparts of the

Knitted elements, a wire in a first defined bending direction are bent and in the other opposite of the active elements in the corresponding

opposite bending direction. Accordingly, a dual function can be exercised with one and the same pliers, depending on the counter-position in which the two active elements are located at the time of the movement on each other.

If it is intended to move only the head region of the first pliers part with respect to the second pliers part or its head region, this can be done e.g.

be realized in that the head portion has a telescoping, ie a length variability perpendicular to the axis of rotation. For that, the Head area, for example, be made in two parts, these two parts are mutually displaceable.

If the entire pliers parts are mutually displaceable perpendicular to the hinge axis this can be formed by a displaceability, which is realized in the joint, which rotatably connects both pliers parts.

A preferred embodiment of the pliers may provide that the gripping areas of the two pliers parts at least in cross section perpendicular to the hinge axis

are formed identical in shape and in a parallel, overlapping position of both gripping areas, the first and the second active element are successively be laid or lie automatically, in particular in a direction behind the other, by an imaginary line connecting the respective head and

Handle portion of the pliers parts is formed and the hinge axis crosses.

This backsplash, which is preferably achieved automatically in the overlapping position of the grip regions, especially when the mobility is in the joint, can then represent a forceps position in which no essential function can be performed with the forceps but the forceps have minimal dimensions, e.g. is advantageous for transport and storage.

It can be inventively provided that the first active element of a succession, preferably with overlapped grip areas, relative to the second active element in two opposite directions, ie both clockwise about the hinge axis and counterclockwise about the hinge axis is movable and as desired of a Alternatively, the user can be moved in the first or in the second possible opposite, which is achieved by first making a circular motion in one or the other desired direction and then the radius of the circular motion of the first active element by displacement, either only the head area or of the pliers part in the joint is reduced. With a rotating back movement of the first active element in the direction of the second this is then due to the reduced radius of the

Circular path no longer moved past the second active element, but fed to this and can be the desired effect on an object z. B. exercise a wire to be bent.

The identical shape of the two gripping areas here has the particular advantage that both in the first and in the second possible opposite of the active elements to each other always results for the user the same way of gripping and operation of the forceps. In this respect, there is no handling difference for the user and the pliers can also be operated in the same way by both right-handed and left-handed persons.

Particularly preferred is that embodiment of the handle elements is considered, in which each of the handle elements has an at least partially preferably, the overall oval outer contour and an at least partially, preferably complete oval recess.

Such an oval configuration in the outer contour of the grip elements can be achieved by starting each of the two from the joint area

Gripping areas, in particular those in the direction of the hinge axis parallel

one above the other in the direction away from the hinge axis, divided into two arms, whose inner and outer contour is made bent and both

Arm regions at the maximum distance from the hinge axis into each other, wherein the curved contour is formed both at the outer and in the inner region of the arms in each case at least partially oval or elliptical.

Particularly in the case of this design, with general validity but also with other design possibilities of the grip elements, it may be provided that the grip elements, in particular also the head regions, are mirror-symmetrical on both sides of a plane comprising the joint axis. In particular, such a mirror symmetry in the respective head region of the two pliers parts achieved that the active elements have this mirror symmetry and therefore by the mutually moved active elements in one or in the other opposing the same type of deformation, eg. B. the wire bend, but is achieved in opposite directions.

An inventive design of the forceps may provide that the joint, in particular an applied hinge comprises a pin which extends from one of the pliers parts in the direction of the other pliers part through a Langlochausnehmung in the other pliers part, in particular wherein the

Langlochausnehmung is elongated in a direction of connection between the head and handle portion of the pliers part.

This ensures that the pliers parts are located around the center of the pin

Joint axis are rotatable to each other, but also one

Longitudinal displaceability of the pliers parts results in a direction perpendicular to the hinge axis, characterized in that the one pliers part in the direction of Langlochausnehmung can be moved around the pin around, so that when positioning the pin at one end of the oblong hole a small radius

Circular path movement of the first active element and in the opposite positioning at the other end of the slot recess results in a large radius of Kreisbahribewegung.

Thus, in the one positioning of the pin within the oblong hole is achieved that the first active element can be moved past the second active element to change the two opposites and in the other positioning is moved in the selected counter-layer, the first active element to the second until contact.

A development of this type of joint training may provide that the oblong hole between their end, especially in the middle of a Has cross-sectional reduction and the pin an at least one-sided

Flattening, preferably a two-sided flattening with two each other

Has opposing flats, in particular wherein the at least one flat of the pin perpendicular to the connecting direction between

Head area and handle portion of the pin-carrying pliers part is oriented.

Thus, it can be achieved that the elongate hole, which is tapered in the cross section, preferably centrally between the two end positions, only passes over the pin

can be pushed away when the plane of the at least one flattening is in the direction of Langloch extension, since then in this direction the

Pintle thickness is reduced and the slot with its cross-sectional reduction can be pushed over the pin.

This ensures that only in preferred a certain position, or in two mutually inverse directions longitudinal displacement of the two pliers parts perpendicular to the hinge axis is possible, therefore, such a shift thus not accidentally upon actuation of the pliers at one of the selected

Comparison of the active elements results. A user who wants to change a counter-position of the active elements, therefore, must deliberately bring the two pliers parts to a certain rotational angle position to push the pliers part with slot perpendicular to the hinge axis on the pin and so the positioning of the pin in one or the other end position to change the long hole.

In particular, the construction can be chosen such that the first pliers part is displaceable relative to the second pliers part perpendicular to the hinge axis only in such a position in which the two connecting directions of the two pliers parts between the respective head and gripping area are oriented perpendicular to each other.

As already mentioned, a particularly preferred field of application of such a forceps of the type according to the invention in the orthodontic area and here especially in the bending of wires, so that it can provide a preferred development of the forceps that the active element of the one

Zangenteiles, in particular the first pliers part by a single

finger-shaped or pin-shaped element and the active element of the other

Zangenteils by two spaced, in particular two in the connecting direction between the head and handle portion spaced finger-shaped or pin-shaped elements is formed and that further formed by the individual finger-shaped element active element in two possible opposing respectively between the two finger-shaped elements of the other active element

is arranged.

It is thereby achieved that a positioned between the active elements wire from the first active element with the one finger-shaped element in the

Spaced distance between the two finger-shaped elements of the second active element and is accordingly bent around an axis which is parallel to the one finger-shaped element of the first active element, in particular in its center.

An embodiment may also provide that the active element with a

Finger element can dip into the distance range between the two finger-shaped elements of the second active element.

A further preferred embodiment may additionally provide that the

finger-shaped elements of both pliers parts each have a longitudinal extension direction, which has an angle greater than 0 ° and less than 90 ° and preferably less than or equal to 45 ° and more preferably from 10 ° to 30 ° to the hinge axis.

This achieves an angle of curvature of the finger-shaped elements which, especially in orthodontic applications, enables a treating physician to position the head region of a forceps in the palate area or the lingual area between the rows of teeth

Wire bending in the plane of the dental arch to make. According to the preferred embodiment described above, that the active elements are preferably arranged in a covered position of the handle elements in a successive position, can be achieved in a design of the active elements as finger-shaped elements that in such

Hintereinanderlage the longitudinal extension directions of the finger-shaped elements are all in the same plane and parallel to each other.

By a movement of a finger-shaped element in a counter-position to the active element with the two finger-shaped elements is then due to the cranking, that is, the angular positions of the longitudinal extension directions of the finger-shaped elements, that in the opposite

Longitudinal directions of the finger-shaped elements of both active elements are no longer parallel to each other, so that a preferred development can provide here that the formed by a finger-shaped elements active element widens towards its end, in particular the

Broadening in a direction perpendicular to the direction of connection between

Head area and grip area is and particularly preferably such that the mutually facing edges of both active elements in both possible

Opposites are parallel to each other.

Thus, it can essentially be ensured that a wire bend of the wire enclosed between the active elements takes place during a force application in a plane which is oriented perpendicular to the longitudinal extension directions of the two finger-shaped elements of the second active element.

A preferred embodiment will be described in detail with reference to the following figures.

FIG. 1 shows in several views a pliers according to the invention

Wire bending pliers, for example, for the orthodontic application, which includes an upper pliers part 1 and a lower pliers part 2, both in the joint 3rd are rotatably pivotable about the hinge axis A. 1 visuallsiert here an arrangement in which the grip portions G1 and G2 both pliers parts, which are in the present case formed with an oval outer contour and oval inner recess 4, are completely covered flush, so that here finger-shaped active elements W1 and W2 in the Head portions K1 and K2 of the pliers parts in the direction of the connecting line V between the handle and the head portion, which intersects the hinge axis A, are arranged one behind the other.

It can be seen in FIG. 1 that the pin 5 of the joint is arranged in an end region of the elongated hole 6, which is located in the upper tong part 1, so that the active element 1, which is here designed as a single finger, has the maximum possible radial distance to the hinge axis A and the front around the head area or the second active element W2 of the pliers part 2 can be moved around in a pivoting of the pliers parts against each other.

1 also visualizes here that in the head region the finger-shaped active elements W1 and W2 arranged thereon have a cranked arrangement, that is to say the longitudinal extension directions of the finger-shaped elements W1 and W2 form an acute angle α of preferably 10 ° to 30 ° with the hinge axis A.

FIG. 2 visualizes that the active element 1 can be moved into a first opposing position to the active element 2, in which the active element 1 is arranged on the left side of the active element 2 with reference to FIG.

For this purpose, the invention provides that the pliers part 1 against the

Is pivoted clockwise, namely in particular in a position in which the connecting directions V1, V2 between the head and handle area both

pivoted pliers parts are at 90 ° to each other, so that the pliers part 1 can be pushed along the Langloch extension over the pin 5 total. In the present case, this sliding movement is possible only in the position described here, since the slot 6 has a central reduction in cross-section 6a, which is formed corresponding in width to the width of the flattened pin 5, the two-sided flats 5a are aligned with the central slot edge.

Thus, in this positioning of the pliers parts, the pliers part 1 can be pushed away perpendicular to the hinge axis A on the pin 5 until it reaches the opposite end position in the slot and thereby the radius of the possible rotational movement of the active element 1 has reduced about the hinge axis A.

If then the pliers part 1 is pivoted clockwise relative to the pliers part 2, then the active element 1 no longer runs past the active element 2, but to this if necessary. To contact and achieved the aforementioned first counter-overlay, in which the active element with the one finger-shaped Element is positioned on the left side of the active element 2.

A corresponding counter-overlay on the other side of the active element 2 can also be achieved, as visualized by FIG. 3, which at the same time represents the preferred application of the forceps according to the invention for wire bending

clarified.

Here it can be seen that the pliers according to the invention the two

To be able to realize opposing positions between active elements 1 and 2 in order to bend a wire 8 in two different, preferably opposite directions, depending on which opposing layer is selected between the active elements.

It can also be seen in FIG. 3 that due to the symmetrical construction of the gripping elements both with regard to a center plane between the gripping elements which is perpendicular to the axis of rotation and with respect to a plane which comprises the axis of rotation and extends between the head and the gripping area, an identical in both comparisons handling for a person using results.

FIG. 1 shows that the longitudinal extension directions of the finger-shaped

Elements of the active elements W1 and W2 in the back-to-back position of FIG. 1 lie parallel to one another, which leads to the fact that in the case of the two possible ones

Opposite the longitudinal extension directions no longer show parallelism.

For this reason, it can be the embodiment according to the invention according to the

Visualization in Figure 4 provide that the active element W1 is formed with the one finger-shaped element such that increases the finger-shaped element in the direction of its free end in width and in particular so that in both opposing the respective opposite side flanks F the finger-shaped elements of active element W1 and W2 are oriented parallel to each other. The lower end of the one finger-shaped element of

The active element W1 here is accordingly opposite an upper region of this

Element in a direction widened, which is substantially perpendicular to

Rotary axis A of the joint 3 and / or perpendicular to the aforementioned

Connection direction V is located.

Recognizable in the figures is the universal applicability of the forceps according to the invention in both possible opposing positions in order to carry out opposite bending functions in a wire 8. Accordingly, a treating physician need not change between two different forceps on the right or left side in the palate or lingual region of a patient for the different bending tasks, but may use one and the same forceps and only need the active elements in the head region of this forceps in the two possible

bring different confrontations.

In addition, it should be pointed out that the forceps according to the invention are not based on the example of the wire bending in the dental or extensively described here.

orthodontic area is limited, but also other Open up areas of application, in particular those in which the active elements are not necessarily finger-shaped but have different shapes, so that, depending on the selected counter-overlay different, especially similar

Deformation functions with opposite deformation directions result.

Claims

claims

1. pliers comprising a first and a second pliers part (1, 2) each having a gripping region (G1, G2) and a head region (K1, K2), wherein the pliers parts (1, 2) between these regions by a joint (3) connected and about a hinge axis (A) around against each other

each head portion (K1, K2) having an angled active element (W1, W2), wherein the first active element (W1) of the first pliers part (1) in a confronting position to the second active element (W2) of the second pliers part (2) on a Side of the second

Active element (W2) is positionable, characterized in that at least the head portion of one of the pliers parts relative to the other pliers part, in particular both pliers against each other are perpendicular to the hinge axis displaced, in particular in the joint, and the first active element (W1) to the second active element (W2) around in a second opposite to the second active element (W2) on the other side of the second active element (W2) is movable.

2. Pliers according to claim 1, characterized in that the gripping regions (G1, G2) of both pliers parts (1, 2) at least in cross section perpendicular to the hinge axis (A) are formed identical in shape and in a parallel overlapping position of both gripping areas (G1, G2 ), the first and the second active element (W1, W2) are at least one behind the other, preferably automatically behind the other, in particular in a common joint axis crossing the connecting direction between the respective head and handle area, in particular from this

Hintereinanderlage the first active element (W1) relative to the second active element (W2) is movable in two opposite directions.

3. Forceps according to claim 2, characterized in that each of the grip elements (G1, G2) an at least partially oval

Having outer contour and an at least partially, preferably completely oval recess (4).

4. Pliers according to one of the preceding claims, characterized in that at least the grip elements (G1, G2), in particular also the

Head regions (K1, K2) on both sides of a joint axis (A) comprising plane (E) are formed mirror-symmetrically.

5. Pliers according to one of the preceding claims, characterized in that the joint (3) comprises a pin (5) extending from one of the pliers parts (2) in the direction of the other pliers part (1) by a

Langlochausnehmung (6) in the other pliers part (1) extends therethrough, in particular wherein the Langlochausnehmung (6) is elongated in the connecting direction (V) between the head region (K1) and handle portion (G1) of the pliers part (1).

6. Pliers according to claim 5, characterized in that the

Langlochausnehmung (6) between your end a

Has cross-sectional reduction (6a) and the pin (5) has an at least one side flattening (5a), in particular two opposite

Has flats (5 a), in particular wherein the at least one flat (5 a) perpendicular to the connecting direction (V) between

Head area (K1, K2) and handle area (G1, G2) is oriented.

7. Pliers according to claim 6, characterized in that the first pliers part (1) relative to the second pliers part (2) perpendicular to the hinge axis (A) is displaceable in a position in which the two

Connecting directions (V1, V2) of the two pliers parts (1, 2) between the respective head and handle area (K1, K2, G1, G2) are oriented perpendicular to each other.

8. Pliers according to one of the preceding claims, characterized in that the active element (W1) of a pliers part (1) by a finger-shaped element and the active element (W2) of the other

Zangenteils (2) by two spaced, in particular two in the connecting direction (V2) between the head and handle area (K2, G2) spaced finger-shaped elements is formed and formed by the one finger-shaped element formed active element (W1) in both possible opposing between each the two finger-shaped elements of the other active element (W2) is arranged, in particular at least partially immersed between the two finger-shaped elements.

9. Pliers according to claim 8, characterized in that the

finger-shaped elements of both pliers parts (1, 2) one each

Have longitudinal direction, the hinge axis (A) has an angle (a) greater than 0 degrees and less than 90 degrees, preferably less than or equal to 45 degrees, more preferably from 10 to 30 degrees.

10. Pliers according to one of the preceding claims 7 or 8, characterized

in that the active element (W1) formed by the one finger-shaped element widens in the direction towards its end, in particular the widening (7) lies in a direction perpendicular to the connecting direction (V1) between head region and grip region (K1, G1), in particular such in that the mutually facing flanks of both active elements (W1, W2) are parallel to one another in both possible opposing positions.