Manually operable cutting tool

Abstract

A manually operable cutting tool (1) having a first tool arm (2) and a second tool arm (3) which can be pivoted relative to one another about an axis of rotation (x), the tool arms (2, 3) forming a cutting opening (11), the working surface (9, 10) of the cutting opening (11) being further provided with a cutting edge (12, 13, 21), and the working surface (9) of the first tool arm (2) having a first and a second cutting edge (12, 13), wherein the first cutting edge (12) transitions to the second cutting edge (13) by means of a protruding shoulder (14), and wherein the shoulder (14) overlaps the second tool arm (3) in such a way that an opening region (35) left in the first closed position is formed.

Description

Technical Field

[0001] The present invention relates to a manually operable cutting tool, which has two tool arms, namely a first tool arm and a second tool arm, which are capable of pivoting relative to each other around a rotation axis along a pivot plane, wherein the tool arms form a gripping section on one side of the rotation axis and a cutting opening on the other side, wherein the working surface of the cutting opening is also designed with a cutting edge, and the working surface of the first tool arm has a first and a second cutting edge, wherein the first cutting edge of the first tool arm is transformed into a shoulder protruding in a closing direction relative to the second cutting edge at a transition section to the second cutting edge, wherein the shoulder overlaps with the second tool arm in a closing area for the first time in the first closing position when the cutting tool is moved to a closed position, wherein in the first closed position, viewed radially from the rotation axis, the closing area is located at the radial end of an opening area retained between the first cutting edge of the first tool arm and the second tool arm in the first closed position. Prior art

[0002] These cutting tools are used to cut cables or wires, such as copper, steel or fiberglass. Also called cable cutters or cable pliers, these cutting tools are usually long and have no finger holes like scissors.

[0003] A cutting tool of this type is known from document DE 10 2009 044 107 A1. This cutting tool designed as pliers is provided with a first and a second cutting edge arranged radially in sequence starting from the axis of rotation in the region of two tool arms, the first and second cutting edges being separated by a shoulder protruding relative to the second cutting edge. The second cutting edge is in contact in the manner of a side cutter. The jaws of the pliers are designed with a cutting edge that extends continuously in a rounded manner relative to the first cutting edge. The second cutting edge is offset relative to the first cutting edge in the cutting plane and runs continuously in a straight line, and the cutting process can only be completed when the pliers are completely closed. This cutting tool is not very suitable for cutting multi-core cables.

[0004] Document WO 2021 / 160549 A1 discloses a pliers-shaped cutting tool, whose cutting edges overlap for the first time in the radially outermost area when the tool is closed. In the first closed position, a plurality of cutting areas with respective curved contours and which together form an opening area are formed on the radial inner side. The same cutting area is configured on both tool arms. The cutting areas are separated by a pointed connecting area, which forms the edge of the opening contour in the first closed position. Although this cutting tool can cut cables well, it is not practically possible to use this cutting tool for further preparatory or supplementary cutting processes, such as initial cutting or insulation removal.

[0005] A pair of gardening shears is known from document US 1 520 529 A, in which, in a first closed position, one of the pliers arms is provided with a substantially straight cutting edge on the radially outer side and radially inner side relative to the first overlapping position. With respect to the opening profile, the substantially straight edge is opposite to the substantially continuously concave and slightly curved cutting edge of the other tool arm. A convexly curved stepped transition portion, also continuously designed as a cutting edge, is provided on one tool arm from the first cutting edge to the second cutting edge, and a convexly rounded protruding connecting area is provided on the other tool arm, which overlaps with the stepped transition portion of the first tool arm in the first closed position. Such gardening shears are hardly suitable for cutting cables. The shape of the cutting edge may result in relatively high cutting forces when cutting the cable. In the first closed position, the cutting opening with respect to the second cutting edge is already substantially closed. Similar prior art can also be found in document US 3 461 555 A.

[0006] In addition, reference may be made to the documents DE 297 033 08 U1, DE 195 064 57 C2 and DE 295 025 91 U1 with regard to the prior art.

[0007] There is a need for a cutting tool with which, on the one hand, a cable having a plurality of cores can be advantageously severed, but with which, however, a first stripping of the sheath or deinsulation of the cores can also be advantageously performed independently of the severing.

[0008] Starting from the above-mentioned prior art, the object of the present invention is to provide a cutting tool which is particularly suitable as a cable cutter and which can also be operated as ergonomically as possible. Summary of the invention

[0009] According to the first inventive concept, a possible solution to the technical problem is provided in a cutting tool, wherein it is stipulated that the first cutting edge of the first tool arm has two first and second cutting areas designed radially in sequence, and the first and second cutting areas transition to each other through a first pointed connecting area, wherein the first pointed connecting area also constitutes a part of the edge of the opening area in the first closed position, and a first radial line starting from the rotation axis in the pivot plane is observed from the outside in the opposite direction of the closing direction and is close to the first pointed connecting area, the first radial line passes through the shoulder approximately at half the height, the height is measured along a vertical line perpendicular to a second radial line extending in the pivot plane, the second radial line contacts the lowest point of the second cutting edge of the first tool arm when observed in the opposite direction to the closing direction, wherein the vertical line extends through the most protruding area of ​​the shoulder in the closing direction.

[0010] A possible solution to the technical problem may also be that the first and second cutting edges of the first tool arm respectively have two first and second cutting areas arranged in sequence in the radial direction, and the first and second cutting areas transition to each other through first and second pointed connecting areas, wherein these pointed connecting areas are respectively designed as convex transition parts, which separate the first and second cutting areas respectively formed by concave edges, and a straight line contacting the pointed connecting area from the outside passes through a shoulder formed between the first and second cutting edges, wherein a protrusion size of the shoulder measured perpendicular to the straight line is equal to four times or more of the maximum depth of the area covered by the straight line of the first cutting area of ​​the second cutting edge, and the maximum depth is measured perpendicular to the straight line in the opposite direction from the straight line.

[0011] Another possible solution to the technical problem is that the first cutting edge of the first tool arm has two first and second cutting areas designed radially one after the other, the first and second cutting areas transition to each other via a first pointed connecting area, and only the shoulder formed on the first tool arm is penetrated by a fourth radial line starting from the rotation axis in a radially outer section of the first edge facing the second cutting edge, the fourth radial line penetrates the shoulder at the intersection in a section approximately at the midpoint of the height of the shoulder with reference to the intersection, and approximately half or more of its length in this radially outer section extends along a tangent intersecting the fourth radial line at the intersection, wherein the height is obtained from the dimensions measured perpendicularly to the fourth radial line up to a first measuring point at which the shoulder itself is farthest from the fourth radial line in the closing direction and up to a second measuring point at which the second cutting edge is farthest from the fourth radial line in the opposite direction of the closing direction, and the edge in this section transitions to a convex curvature towards the first measuring point and to a concave curvature towards the second measuring point, respectively, as viewed from the intersection.

[0012] The shoulder is thus steeply oriented, but is provided with a curved transition radially inwardly and radially outwardly. This provides the possibility of an advantageous continuous cutting regardless of the shoulder, especially if the shoulder is designed as a cutting edge continuously, as is preferred. At the same time, since the shoulder is thus designed relatively steeply, an advantageous separation can still be achieved between the first cutting edge and the second cutting edge or between the remaining open areas in the first closed position.

[0013] By each of the proposed embodiments, but also optionally only by a combination of individual features of the proposed solution, it is possible to achieve an improved cutting result, for example when cutting cables, in particular electrical cables, with a cutting tool that is advantageously operated by the user. In particular, by radially subdividing the cutting edge of the first tool limb into cutting regions that transition into one another by a pointed connecting region, in particular when the opening region is limited by a shoulder in a first closed position, an all-round closed cutting opening is obtained, in which the cable, even cables of different sizes, can be completely located according to its circumference and can then be advantageously cut by the leading pointed connecting region with an advantageous initial separation. Due to the given conditions, the shoulder is relatively large, while at the same time the second cutting region of the first cutting edge simultaneously rises radially outwards towards the shoulder, so that the cable to be cut can be advantageously accommodated and cut with an advantageous force. In particular, due to the additionally provided second cutting edge, an advantageous pre-separation on the cable can also be carried out with the same cutting tool.

[0014] Starting from the first closed position, it is also possible to make the first, but only, cut on the cable from the radial outside, possibly using only the second cutting edge extending radially outwards relative to the shoulder, without the overall risk that the cable will enter the area of ​​the first cutting edge and possibly be completely severed due to the shoulder. During such a cut, the relatively high shoulder, i.e. protruding greatly in the closing direction, can, so to speak, block the area of ​​the first cutting edge at an early stage.

[0015] When cutting with the first cutting blade, the pointed connection area between the concave edges of the cutting area of ​​the first cutting blade may cause a basically point-shaped cutting load and corresponding cutting-in to the workpiece to be cut, such as a cable, during the cutting movement. During the further cutting closing movement, this point-shaped load caused by the pointed connection area will gradually expand the cutting process along the circumference of the workpiece to be cut from both sides. Therefore, a single incision can be first formed in the circumference of the workpiece to be cut or the extension direction of the cutting blade, preferably, a plurality of single incisions can be formed in cooperation with the cutting blade of another tool arm, and these incisions can be combined into an integral incision covering the entire cross-section of the workpiece to be cut. In this way, cutting can be completed under relatively small cutting forces. By a given geometric relationship, that is, the first radial line starting from the axis of rotation in the pivot plane contacts the first pointed connection area from the outside and penetrates the shoulder at about half the height of the shoulder, a relatively large free extension of the shoulder in the closing direction can be achieved, while the second cutting area of ​​the first cutting blade also rises toward the shoulder, preferably continuously extending to the apex or apex area of ​​the shoulder.

[0016] The first and second cutting edges of the first and second cutting edges also lie in the same cutting plane together with the shoulder, which preferably also has an edge region designed as a cutting edge substantially or over its circumference or over its entire circumference.

[0017] In addition or alternatively, another possible geometric relationship is that the straight line that contacts the pointed connecting area of ​​the first cutting edge and the second cutting edge of the first tool arm from the outside passes through the shoulder formed between the first cutting edge and the second cutting edge, in which case the protruding dimension perpendicular to the straight line (perpendicular to the straight line, with respect to the shoulder, represents the distance from the shoulder to the straight line) is equivalent to four times or more the maximum depth of the first cutting area of ​​the second cutting edge spanned by the straight line measured from the same straight line, which describes the proportional relationship between the relatively large shoulder and the concave portion of the first cutting area of ​​the second cutting edge. This design also brings the above-mentioned advantages of the cutting tool described herein.

[0018] The connecting region can be formed in a roof-like or rounded, in particular convex, manner, or alternatively also in the form of a blunt-pointed region with, for example, straight surfaces.

[0019] Subdivision of one or both cutting edges of the first tool arm can also be used to provide different processing areas. For example, a concave first cutting edge radially inwardly adjacent to the second cutting edge can be used as a stripping area in cooperation with the third cutting edge. Other concave structures of the cutting edge formed on one cutting edge of the first or second tool arm can also be used for stripping.

[0020] In addition to limiting the opening area to the first closed position in the area of ​​the second cutting edge, the shoulder also provides a depth stop for introducing the cut material in the area of ​​the second cutting edge, so that the cut material cannot enter the area of ​​the first cutting edge in a radially inward direction when the desired processing is performed in the area of ​​the second cutting edge.

[0021] By designing the shoulder, the cutting opening is subdivided radially relative to the rotation axis into mutually separated cutting zones. By appropriately spreading out the gripping section of the cutting tool, the shoulder can be pivoted into a position in which the passage between the radially outer cutting zone and the radially inner cutting zone is released, so that the material to be cut can be introduced into the region of the first cutting edge of the first tool arm.

[0022] Due to the selected geometrical design, for example with regard to the shoulder height in relation to the maximum depth of the second cutting edge, a cutting tool is created with which it is also possible to work in a manually operable manner via the radially outer second cutting edge, and more particularly via the radially outer region of the second cutting edge, without having to accept an unfavorably large arm width in the region of the grip section for this purpose. For example, this end region of the second cutting edge can be used to cut into or strip the cable sheath (so-called "biting") or further to deinsulate the wire core.

[0023] The first radial line may penetrate the shoulder at half the height of the shoulder, wherein the proportion of the vertical line portion located between the first radial line and the maximum protrusion area of ​​the shoulder may be equivalent to about 40% to 60% of the total vertical line between the second radial line and the maximum protrusion area of ​​the shoulder.

[0024] The protrusion size of the shoulder may be equal to 4 to 8 times, for example 4.5 to 6.5 times, the maximum depth of the area of ​​the second cutting edge covered by the straight line connecting the plurality of connecting areas.

[0025] The features of the aforementioned independent claims are significant not only individually but also in any combination, wherein features of an independent claim can further be combined with features of other independent claims or features of multiple independent claims and further also with only individual features of one or more other independent claims.

[0026] Further features of the invention are often explained below and also in the description of the figures in their preferred manner in connection with the subject matter of claim 1 and / or the further independent claim 2 or with the features of the further claims. However, they may also be of significance in connection with only individual features of claim 1 and / or the further independent claim 2 or the respective further claims or each independently.

[0027] According to one embodiment, it can therefore be provided that the first cutting edge over its entire length and the second cutting edge over its substantially entire length are movable overlappingly with a third cutting edge of the second tool limb, the third cutting edge extending the total length of the first and second cutting edges.

[0028] Accordingly, the third cutting edge in the region of the second tool limb is preferably designed for cutting cooperation with the first cutting edge and the second cutting edge of the first tool limb.During the cutting closing movement, the cutting edges of the first and second tool limbs move overlappingly in a scissor-like manner.

[0029] In another advantageous manner, the raised shoulder is only (exclusively) formed on the first tool arm. This is particularly advantageous for releasing the radially inner cutting zone with the first cutting edge or for opening a passage between the radially outer cutting zone and the radially inner cutting zone, since this design requires a relatively small expansion of the gripping section compared to an arrangement in which both tool arms have raised shoulders. This asymmetric design with respect to the edge or cutting edge of the tool arm facing the cutting opening is preferred.

[0030] The shoulder is a design of the first tool limb which, in the first closed position, overlaps the second tool limb, in this case the cutting edge formed thereon. In the first closed position, the pointed connecting section is either part of the remaining opening area or a part of the second cutting edge of the first tool limb that extends freely outwards. With regard to the one or more pointed connecting sections of the cutting edge of the second tool limb, such a connecting area is likewise either part of the opening area or a part of the cutting edge that extends freely outwards to the radial outside of the shoulder. In the closed position, further with regard to the second tool limb, preferably a part of the cutting edge of the second tool limb that extends substantially along a radial line and preferably substantially in a straight line overlaps the shoulder.

[0031] A third pointed connecting area is formed in the first half of the length of the third cutting edge as viewed from the axis of rotation, the length being measured with reference to a projection perpendicular to a third radial line extending in the pivot plane, the third pointed connecting area thus also forming part of the edge of the opening area in the first closed position. The third pointed connecting area can be formed as a convex transition corresponding to the first connecting area of ​​the first cutting edge described above, which separates the adjacent cutting area of ​​the third cutting edge, which is preferably formed together with the concave edge. Due to this further preferred design, an auxiliary support effect can be provided during the cutting process, in particular in the first cutting edge or the first cutting area.

[0032] In another embodiment, the third cutting edge is designed such that a third radial line starting from the rotation axis in the pivot plane, viewed in the closing direction, abuts against the third pointed connecting area from the outside, and the third radial line does not penetrate the second tool limb, i.e., other areas of the third cutting edge constructed thereon, outside the third pointed area, outside the third pointed area. Instead, such a radial line starting from the rotation axis, which is preferably tangential or in contact with the connecting area, extends freely radially outward (may only penetrate the first tool limb, depending on the closed position of the tool limbs). Therefore, preferably, when viewed from the first tool limb, the cutting area of ​​the third cutting edge that is adjacent to the radially outer side of the third connecting area extends continuously for a distance outside the third radial line, while the cutting area of ​​the third cutting edge that is adjacent radially inward from the third connecting area can, if necessary, completely intersect the third radial line in the pivot plane, for example in the radially inner end area of ​​the edge that defines the opening area.

[0033] The first and third pointed connecting areas can be designed to be radially offset relative to each other. In this respect, the size of the offset is preferably selected so that during the closing of the opening area, the first and third connecting areas between the first and third cutting edges do not or do not significantly directly overlap each other. Accordingly, when the cutter arm is pivotally displaced around the axis of rotation, the first and third pointed connecting areas will move along circular trajectories with different radii. In this way, a workpiece such as a cable accommodated in the area of ​​the first cutting edge can be cut in advance in a radially offset manner relative to the axis of rotation in order to cut or sever, thereby achieving an advantageous cutting process.

[0034] Here, according to a preferred embodiment, it is further provided that the third pointed connection area of ​​the third cutting edge is designed closer to the rotation axis than the first pointed connection area. Therefore, for example, the most protruding point of the first pointed connection area in the closing direction can be moved on a circumferential line, and the radius of the circumferential line can be equivalent to about 1.1 to 1.5 times, and further, for example, about 1.25 times, the radius of the circumferential line defined by the most protruding point of the third pointed connection area in the closing direction.

[0035] In a further embodiment, the radius of the movable circle of the third pointed connection area may be approximately 0.4 to 0.6 times, further approximately 0.5 times, the radius of the movable circle of the most protruding area or point of the shoulder in the closing direction.

[0036] The first and second cutting edges of the first tool arm can be designed as edges of a first abutment and support surface of the first tool arm. In addition, the third cutting edge of the second tool arm can also be designed as an edge of a second abutment and support surface of the second tool arm, wherein the first abutment and support surface and the second abutment and support surface are moved or aligned overlappingly in the closed position. Here, the first and second abutment and support surfaces can each extend in the same continuous plane. The continuous plane can preferably be a pivot plane extending perpendicularly to the axis.

[0037] In a further embodiment, the first partial area of ​​the first cutting edge and the first partial area of ​​the second cutting edge may extend (substantially) along the same second radial line extending in the pivot plane relative to the axis of rotation. When the second radial line is in tangential contact with the edge of the first partial area of ​​the first cutting edge or the edge of the first partial area of ​​the second cutting edge, with respect to the further first partial area of ​​the other cutting edge, there may be a distance perpendicular to the second radial line to the further first partial area, which is preferably less than 1 mm, further preferably less than 0.5 mm, for example 0.1 or 0.2 mm.

[0038] According to a further preferred embodiment, the length of the first cutting edge measured along the second radial line up to the most protruding point of the first cutting edge in the closing direction is equal to twice or less the protrusion dimension of the most protruding point in the direction perpendicular to the second radial line. It is further preferred that the most protruding point of the first cutting edge is formed by the most protruding point of the shoulder, so that it faces the first radially inner cutting area respectively, and the shoulder can form a part of the first cutting edge or a part of the second cutting area of ​​the first cutting edge.

[0039] The cutting edge of the second tool limb, ie the third cutting edge, preferably also extends in the same plane over its entire radial length, ie actually in the pivot plane. Therefore, this pivot plane also corresponds to the cutting plane.

[0040] In a further embodiment, the first contact and support surface of the first tool limb can be continuously configured with a cutting edge with a cutting angle including a shoulder. The shoulder is therefore preferably part of the first and / or second cutting edge of the first tool limb, in this respect further preferably in terms of a shoulder side extending approximately in the protrusion direction of the shoulder, but otherwise circumferentially.

[0041] The cutting angles are different over the length of the first and / or second cutting edge of the first tool arm. Thus, in the immediate region where the first and / or second cutting edge is formed, a typical cutting angle of about 20° to 40°, further, for example, about 35°, may be present, and preferably also in the shoulder side region facing the first cutting edge a typical cutting angle of about 20° to 40°, further, for example, about 35°, may be present, while the shoulder side region facing the second cutting edge may have a larger cutting angle, for example, 75° to 88°, further, for example, about 85°.

[0042] The ranges and value ranges or multiple ranges shown above and below also include all intermediate values ​​in the disclosure content, especially at 1 / 10 intervals of the respective scale, possibly also without scale. For example, the data 20° to 40° also includes the disclosure of 20.1° to 40°, 20° to 39.9°, 20.1° to 39.9°, etc., and the disclosure of 4 to 8 times also includes the disclosure of 4.1 to 8 times, 4 to 7.9 times, 4.1 to 7.9 times, etc. This disclosure can be used on the one hand to limit the lower limit and / or upper limit of the provided range, and on the other hand it can also be used to disclose one or more single values ​​within the provided range. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention is explained below by means of the accompanying drawings, which however only represent embodiments. In the accompanying drawings:

[0044] Figure 1 A perspective view showing a cutting tool in a closed position with respect to a cutting opening;

[0045] Figure 2Shows the basis of cutting tools Figure 3 A side view of arrow II in FIG.

[0046] Figure 3 Shows the basis of cutting tools Figure 2 Another side view of arrow III in FIG.

[0047] Figure 4 Shows the basis of cutting tools Figure 3 Another side view of arrow IV in FIG.

[0048] Figure 5 Shows the basis of cutting tools Figure 4 The view of arrow V in FIG.

[0049] Figure 6 shows a top view of a cutting tool;

[0050] Figure 7 A bottom view of the cutting tool is shown;

[0051] Figure 8 Show according to Figure 3 A cross-sectional view along line VIII-VIII in FIG.

[0052] Fig. 9 Shows the basis of cutting tools Figure 3 A view of a first cutting area using a second cutting edge;

[0053] Fig.10 Show Fig. 9 A magnified view of the middle region X;

[0054] Fig.11 Shown with Fig. 9 A substantially corresponding view of a second cutting region but using a second cutting edge;

[0055] Fig.12 Show Fig.11 Enlarged view of middle region XII;

[0056] Fig.13 Shown with Fig. 9 Another view substantially corresponding but using the first cutting edge of the cutting tool;

[0057] Fig.14 Show Fig.13 Enlarged view of middle region XIV;

[0058] Fig.15 Shown with Fig. 9 Another substantially corresponding view of an alternative use of the first cutting edge of the cutting tool;

[0059] Fig.16 Show Fig.15Enlarged view of middle region XVI;

[0060] Fig.17 Show Figure 3 Enlarged view of middle region XVII;

[0061] Fig.18 Shown with Fig.17 a substantially corresponding figure, but relating to a first closed position of the cutting tool;

[0062] Fig.19 a single enlarged view of a first tool arm of a cutting tool showing a first cutting edge and a second cutting edge and a shoulder formed between the cutting edges;

[0063] Fig. 20 Show Fig.19 Further enlarged view of the middle area XX;

[0064] Fig.21 A single enlarged view showing a second tool arm of the cutting tool having a third cutting edge;

[0065] Fig. 22 Show according to Fig.17 A cross-sectional view of line XXII-XXII in FIG.

[0066] Fig.23 Show according to Fig.17 A cross-sectional view along line XXIII-XXIII in FIG.

[0067] Figure 24-30 other views showing cutting tools; and

[0068] Fig.31 Shown with Fig.19 A corresponding view is provided to explain further features of the cut regarding the shoulder. DETAILED DESCRIPTION

[0069] First reference Figures 1 to 7 , a manually operable cutting tool 1 is shown and described, here also preferably in the form of a cable cutter, with a first tool arm 2 and a second tool arm 3, which cross at a hinge pin 4 (joint) and can be pivoted relative to each other about a geometrical rotation axis x formed by the hinge pin 4 in a pivot plane E. The rotation axis x is preferably oriented perpendicular to the pivot plane E.

[0070] Each tool arm 2 and 3 is configured with a gripping section 5 and 6 on one side of the hinge pin 4 and with a cutting jaw 7 and 8 on the other side of the hinge pin 4. The working surfaces 9 and 10 of the cutting jaws 7 and 8 are at least in the open position, for example according to Fig.14 A cutting opening 11 is defined. The working surfaces 9 and 10 are designed substantially, as will be explained below, or continuously, as cutting edges.

[0071] In the preferred substantially at least approximately symmetrical design of the tool arms 2 and 3, an asymmetrical design is preferably selected, in particular with regard to the design of the gripping sections 5 and 6 and the outer contours of the cutting jaws 7 and 8, in particular with regard to the working surfaces 9 and 10 of the cutting jaws 7 and 8. The working surface 7 of the first tool arm 2 is preferably different from the working surface 8 of the second tool arm 3. In this design, the tool arms cannot be converted into each other, for example by rotating about their longitudinal axis.

[0072] Therefore, especially from Fig.19 It can be seen from the single illustration that the cutting jaws 7 of the first tool arm 2 are provided with two cutting edges arranged in sequence along the radial R relative to the rotation axis x, namely a radially inner first cutting edge 12 and a radially outer second cutting edge 13, wherein the first cutting edge 12 forms a shoulder 14 protruding along the closing direction S of the cutting tool 1 when transitioning to the second cutting edge 13, in particular a shoulder 14 protruding relative to the second cutting edge 13.

[0073] The two cutting edges 12 and 13 are preferably each subdivided into two cutting areas arranged in sequence along the radial direction R, that is, the first cutting edge 12 is divided into a first cutting area 15 and a second cutting area 16, and the second cutting edge 13 is preferably divided into a first cutting area 17 and a second cutting area 18. The cutting areas 15 and 16 transition to each other through a first pointed connecting area 19, and the cutting areas 17 and 18 preferably transition to each other through a second pointed connecting area 20.

[0074] The cutting jaws 8 of the second tool arm 3 are preferably provided with only one cutting edge (third cutting edge) 21, which is substantially subdivided in the radial direction R into a first cutting region 22 and a second cutting region 23, which preferably transition to each other only through a third pointed connecting region 24 (see also Fig.21 Detailed diagram of the ).

[0075] The pointed connecting regions 19, 20 and 24 are each formed essentially as a convexly curved transition viewed in the (respective) closing direction S, which is also adjoined on both sides by a concavely curved cutting region viewed in the closing direction S. Accordingly, the connecting region is designed to protrude in the closing direction S in a pointed manner relative to the directly adjacent cutting region, so that the cutting regions adjacent on both sides are separated by the connecting region.

[0076] This enables the user to use the one or the other cutting region as desired, thus for example in the region of the second cutting edge 13, wherein the radially outer second cutting region 18 can preferably be used, for example according to Fig.11 and Fig.12 , for example, for cutting into the cable sheath 25, while the radially inner first cutting area 17 can be suitably used, for example, for removing insulation from the core 26 (see Fig. 9 and Fig.10 ).

[0077] Furthermore, the cutting regions separated by the connecting region can also be used in combination, in particular for cutting cables 44 of different diameters (see Figures 13 to 16 ), therefore further particularly with regard to the cutting areas 15 and 16 of the first cutting edge 12 on the radial inner side of the first tool arm 2.

[0078] The first cutting edge 12, together with the second cutting edge 13 and the shoulder 14, forms a first edge 27 that delimits the cutting opening 11 and at the same time delimits a first abutment and support surface 28 of the first tool arm 2 in the region of the cutting jaws 7, which abutment and support surface 28 faces the opposite tool arm 3 and extends in the pivot plane E. A second edge 29 that further delimits the cutting opening 11 is formed by the third cutting edge 21 of the second tool arm 3. This edge 29 at the same time delimits a second abutment and support surface 30 of the second tool arm in the region of the cutting jaws 8, which abutment and support surface 30 also extends in the pivot plane E. The two abutment and support surfaces 28 and 29 are at least in the closed position, for example according to Fig.17 The respective edges 27 and 29 are moved in an overlapping manner when they come into contact with each other, wherein the contact and support surfaces 28 and 30 furthermore extend substantially in the same plane, namely the pivot plane E. The first contact and support surface 28 in the closed position radially overlaps with the second contact and support surface 30 to varying degrees, but preferably always only over a portion of the respective surface.

[0079] The first abutment and support surface 28 of the first tool arm 2 is continuously provided with a cutting edge 31 having a cutting angle α, including a first cutting edge 12, a second cutting edge 13 and a shoulder 14, and the second abutment and support surface 30 is also provided with a cutting edge 32 having a cutting angle β (see Fig. 22 and Fig.23 ). Therefore, the shoulder 14 separating the first cutting edge 12 from the second cutting edge 13 can also be designed with a cutting edge along the edge of the section that freely surrounds the cutting edges 12 and 13 and forms the first edge 27, wherein the relevant edge of the shoulder 13 facing the first cutting edge 12 can be designed as a cutting edge 31 having a substantially identical cutting angle α (e.g., about 20° to 40°, further e.g., about 35°), while the radially outer section of the first edge 27 or the shoulder side 38 facing the second cutting edge 13 is designed according to Fig. 22 The cross-section of the can have a cutting angle α' which is more obtuse than the usual cutting angle α (approximately 20° to 40°), for example 80° to 85°, or even up to 89° if necessary.

[0080] During the pivoting movement of the tool arms 2 and 3 relative to one another in the closing direction S, a first closing position is formed in which the shoulder 14 of the first tool arm 1 first overlaps the second tool arm 3 in the closing region 33, in particular the third cutting edge 21 (see Fig.18 The closure region 33 can preferably be defined by the most protruding region 34 of the shoulder 14 as viewed in the closure direction S, wherein the region 34 is Fig.18 can be dotted in a view of , in which the rotation axis x is shown as a dot, or Fig.18 As shown, it is defined by a straight line segment extending substantially radially relative to the rotation axis x.

[0081] In press Fig.18 In the first closed position, a first opening region 35 surrounded and closed by the edges 27 and 29 of the cutting edges 12 and 21 remains between the first cutting edge 12 of the first tool arm 2 and the third cutting edge 21 of the second tool arm 3. The closed region 33 is located at the radial end of the opening region 35 starting from the rotation axis x as viewed in the radial direction R in the first closed position.

[0082] from Fig.18 It can be further seen from the illustration that in the first closed position of the cutting tool 1, there is a second opening area 36 that continues to be open radially on the outside between the second cutting edge 13 of the first tool arm 1 and the section of the third cutting edge 21 of the second tool arm 3 that protrudes radially outward beyond the closed area 33.

[0083] from Fig.19 It can be seen from the detailed illustration of FIG. 2 that a first radial line R1 starting from the rotation axis x, viewed in the direction opposite to the closing direction S, contacts the first pointed connecting region 19 of the first cutting edge 12 from the outside and passes through the second cutting region 16 of the first cutting edge 12 adjoining the first pointed connecting region 19 and the shoulder 14 adjoining thereto, so that in the region of the side 38 of the shoulder 14 which descends steeply into the first cutting region 17 of the second cutting edge 13, it passes freely outward only with respect to the second tool limb 2. The first radial line R1 spans the concave edge section of the first cutting region 15 of the first cutting edge 12 in a chordal manner.

[0084] The first radial line R1 passes through the shoulder 14 at approximately half the height h of the shoulder 14, which height h is measured along a vertical line a, which extends between the most protruding area 34 of the shoulder 14 (depending on the course of the edge of the shoulder, it can also be a point) and a second radial line R2, which touches the lowest point 37 of the second cutting edge 13 of the first tool arm 2 as viewed in the closing direction S. The vertical line a is relative to the second radial line R2. The lowest point 37 is further preferably located in the region of the first cutting area 17 of the second cutting edge 13.

[0085] from Fig.19It can be further seen from the illustration that, in addition to the contact at point 37 in the area of ​​the second cutting edge 13, the second radial line R2 can also be essentially tangent to the first cutting edge 12 in the area of ​​the first cutting area 15, and if necessary extend at a relatively small distance from the tangent line, preferably less than 1 mm, further preferably a few tenths of a mm, for example 0.2 or 0.3 mm.

[0086] The second radial line R2 preferably further passes completely through the tool limb 2 or the cutting jaws 7 starting from the rotation axis x until it passes in the region of the end face 39 of the first tool limb 2 . Starting from the rotation axis x, the second radial line R2 preferably passes only in the region of the end face 39 .

[0087] Starting from the lowest point 37 of the second cutting edge 13 in the first cutting area 17, with respect to the further direction of the second cutting edge 13, especially with respect to the second cutting area 18 and the second connecting area 20, there is a certain distance from the aforementioned second radial line R2. Therefore, relative to the highest point 40 of the second cutting edge 13 observed in the closing direction S, which is the highest point of the second cutting area 18 of the second cutting edge 13, a height h can be formed along the direction perpendicular to the radial line R2, which height h is equivalent to about 1 / 10 to 1 / 4 of the height h of the aforementioned shoulder 14, and further, for example, about 1 / 6.

[0088] Essentially starting from the most protruding region 34 of the shoulder 14, a length b of the first cutting edge 12 and a length c of the second cutting edge 13 are obtained along a radial line, which length c can be equal to about 0.4 to 0.7 times, further for example about 0.5 to 0.6 times, of the length b. Further, a total length d of the two cutting edges 12 and 13 is obtained, which total length d essentially corresponds to the total length e of the third cutting edge 21 as viewed in the radial direction. The length b of the first cutting edge 12 can further preferably correspond to about 1.5 to 2 times the projection size or height h in the region of the shoulder 14 as viewed perpendicularly to the second radial line R2.

[0089] exist Fig. 20 The enlarged detail of the first tool arm 2 shows a straight line G which, viewed in the direction opposite to the closing direction S, preferably abuts the pointed connecting areas 19 and 20 of the first and second cutting edges 12, 13 in a point-like manner. The straight line G here passes through the shoulder 14 and chord-like covers the concave edge section of the first cutting area 17 of the second cutting edge 13, so as to then re-enter the cutting jaws 7 and exit in the area of ​​the end face 39.

[0090] This results in a projection dimension v of the shoulder 14 measured perpendicularly to the straight line G, which projection dimension v is between the straight line G and the most protruding area 34 of the shoulder 14 or the most protruding point of the first cutting edge 12, which can be formed by the area 34 of the shoulder 14. This projection dimension v can correspond to four or more, for example five or six times, the maximum depth t obtained starting from the straight line G at the point 37 of the first cutting area 17 of the second cutting edge 13 across (see Fig. 20 The height dimension m measured from the straight line G in the region of the highest point 40 of the second cutting edge 13 in the direction of the projection dimension v may further correspond to approximately 1 / 10 to 1 / 5 of the projection dimension v, further for example approximately 1 / 6.

[0091] A third radial line R3 (see for example Fig.21 ), which is tightly attached to the third connecting area 24 when viewed in the opposite direction of the closing direction S of the second tool arm 3, and can freely extend radially outward beyond the third connecting area 24 relative to the second tool arm 3, that is, it no longer penetrates the tool arm 3.

[0092] The third connecting region 24 is preferably located in the first half of the length e as viewed from the rotation axis x, more preferably in the first quarter to the first third of the length e, with reference to the length e of the third cutting edge 21 .

[0093] In a further preferred embodiment, the pointed connecting areas 19 and 24 of the first cutting edge 12 and the third cutting edge 21 are offset from each other in the radial direction R, and it is further preferred that the third pointed connecting area 24 is designed closer to the rotation axis x than the first connecting area 19. Fig.19 and Fig.21 As shown in FIG. 1 , the radius f of the third connection region 24 may correspond to approximately 0.6 to 0.9 times, and further, for example, approximately 0.7 to 0.8 times, the radius j of the first connection region 19 .

[0094] In a further embodiment, the third cutting edge 21 in the region of the second cutting region 23, viewed radially from the third connecting region 24, can first have a concave section which transitions into a substantially straight section 41. A further concave section 42 can be connected to the radially outer end of the straight section 41, the radial end of which ends at an imaginary line 43 extending beyond the straight section 41 (see in particular Fig.21 ).

[0095] Due to the proposed design, in particular two cutting zones Z1 and Z2 are formed, which are basically separated from each other by a protruding shoulder 14, wherein the cutting zone Z1 is located between the first cutting edge 12 of the first tool arm 2 and a section having a third connecting area 24 of the third cutting edge 21 of the second tool arm 3, and the second cutting zone Z2 is located between the second cutting edge 13 of the first tool arm 2 and a radially outer section of the third cutting edge 21 of the second tool arm 3.

[0096] The cutting zone Z1 is particularly suitable for cutting cables 44 of different diameters. By means of the relatively long gripping sections 5 and 6, an advantageous transmission and action on the cutting edge is provided, in particular due to the subdivision of the first cutting edge 12 into two cutting areas 15 and 16 transitioning through the first connecting area 19, and the third connecting area 24 of the third cutting edge 21 and the cutting areas 22 and 23 on both sides thereof, an advantageous cutting action on the cable 44 is achieved. The pointed connecting areas 19 and 24 separating the concave cutting areas essentially first generate a point-shaped cutting load on the workpiece to be cut during the cutting movement, and during the further closing movement of the cutting tool, the cutting process essentially continues in the circumferential direction of the workpiece. Further in a preferred embodiment, an advantageous cutting process is achieved, wherein the opening area defined by the edge side of the first cutting area 22 of the third cutting edge 21 finally overlaps with the opposite cutting edge 12. In addition, due to this design, the first cutting zone Z1 can act on the workpiece to be cut, for example the cable 44, so that the workpiece tends to be stressed towards the rotation axis x in the cutting opening during the cutting process, preferably during the entire cutting process, at least from the time when the first closing point is reached. This desired effect also results in improved cutting results and advantageous, labor-saving operation.

[0097] The radially outer second cutting zone Z2 is preferably used, as described above, to cut into the cable sheath 25 (see Fig.11 and Fig.12 ), in particular, using the radially outer cutting areas of the second cutting edge 13 and the third cutting edge 21, in particular, the second cutting area 18 of the second cutting edge 13 and the concave section 42 of the second cutting area 23 of the third cutting edge 21. The first cutting area 17 of the second cutting edge 13 can be used in conjunction with the straight section 41 of the second cutting area 23 of the third cutting edge 21, for example, to remove insulation from the wire core 26, such as Fig. 9 and Fig.10 shown.

[0098] The shoulder 14 provides a stop towards the radial inside when the second cutting zone Z2 is used, so that the cable or wire core to be processed does not enter the radial inside area of ​​the cutting zone Z1.

[0099] Due to the aforementioned cutting edge geometry, during workpiece processing, the arm width of the gripping sections 5 and 6 in the front cutting zone Z2 is small, thereby providing ergonomic operation.

[0100] refer to Fig.31 , explains another geometric relationship about the shoulder 14, which may be of great significance by itself or in combination with the aforementioned design forms.

[0101] A fourth radial line R4, starting from the axis of rotation x, runs through a radially outer section of the edge of the shoulder 14 at the intersection point s, which edge is also a section of the first edge 27. The intersection point s is selected so that it is approximately in the middle of the height of the shoulder 14. The height of the shoulder 14 is further preferably formed by the dimensions M1 and M2 measured perpendicularly to the fourth radial line R4 at the intersection point s. The dimensions M1 and M2 consist of the distance from the fourth radial line R4 to the farthest measuring point MP1 of the shoulder 14 in the closing direction S and the distance to the deepest point MP2 of the second cutting edge 13. These dimensions M1 and M2 are respectively equal relative to the intersection point s.

[0102] The section of the edge extends substantially rectilinearly, corresponding to a tangent to the fourth radial line R4 at the point of intersection s, and over a considerable dimension, namely at least half of its dimension corresponding to the height.

[0103] It is further preferred that the length of the straight line or the approximate straight line of the edge extending from the intersection s in the direction of the measuring point MP1 is greater than the length extending in the opposite direction, that is, in the direction of the measuring point MP2. It is further preferred that the length of the straight line or the approximate straight line of the edge section in the direction of the measuring point MP1 is approximately 1.2 to 1.8 times the length in the opposite direction, and further preferably approximately 1.4 to 1.6 times.

[0104] The fourth radial line R4 may coincide with the first radial line R1, but it may also be different therefrom. Likewise, the height h mentioned may be consistent with the height described here, or there may be a difference.

[0105] It is also particularly preferred if the first cutting edge has only the one connecting region and / or the second cutting edge has only the one connecting region and / or the third cutting edge has only the one connecting region.

[0106] The above embodiments serve to explain the inventions covered in the application as a whole, which are developed independently at least by the following feature combinations, wherein two, more or all of these feature combinations may also be combined, namely:

[0107] A manually operable cutting tool 1, characterized in that the first cutting edge 12 of the first tool arm 2 has two first and second cutting areas 15, 16 designed successively in a radial direction R, the first and second cutting areas transitioning to each other via a first pointed connecting area 19, wherein the first pointed connecting area 19 also constitutes a part of the edge 27 of the opening area 35 in the first closed position, and a first radial line R1 starting from the rotation axis x in the pivot plane E, viewed from the outside in the opposite direction of the closing direction S, is in close contact with the first pointed connecting area 19, the first radial line passes through the shoulder 14 approximately at half the height h, the height being measured along a vertical line a perpendicular to a second radial line R2 extending in the pivot plane E, the second radial line R2 contacting the lowest point 37 of the second cutting edge 13 of the first tool arm 2 viewed in the opposite direction of the closing direction S, wherein the vertical line a extends through the most protruding area 34 of the shoulder 14 in the closing direction S.

[0108] A manually operable cutting tool 1, characterized in that the first and second cutting edges 12, 13 of the first tool arm 2 respectively have two first and second cutting areas 15, 16 and 17, 18 arranged in sequence along the radial direction R, and the first and second cutting areas transition to each other through first and second pointed connecting areas 19, 20, wherein these pointed connecting areas 19, 20 are respectively designed as convex transition parts, which separate the first and second cutting areas 15, 16 and 17, 18 respectively formed by concave edges 27, and a straight line G contacting the pointed connecting areas 19, 20 from the outside passes through the shoulder 14 formed between the first and second cutting edges 12, 13, wherein the protrusion dimension v of the shoulder 14 measured perpendicular to the straight line G is equal to four times or more of the maximum depth t of the area of ​​the first cutting area 17 of the second cutting edge 13 covered by the straight line G, and the maximum depth is measured perpendicular to the straight line G in the opposite direction from the straight line G.

[0109] A manually operable cutting tool 1, characterized in that the first cutting edge 12 of the first tool arm 2 has two first and second cutting areas 15, 16 designed in sequence along the radial direction R, the first and second cutting areas transitioning to each other through a first pointed connecting area 19, and the shoulder 14 formed on the first tool arm 2 is only penetrated by a fourth radial line R4 starting from the rotation axis x in a radially outer section of the first edge 27 facing the second cutting edge 13, the fourth radial line penetrates the shoulder 14 at an intersection point s in a section approximately at the midpoint of the height of the shoulder 14 with reference to the intersection point s, and the radially outer section Approximately half or more of its length in the segment extends along the tangent T intersecting the fourth radial line R4 at the intersection s, wherein the height is obtained by the dimensions M1, M2 measured respectively perpendicular to the fourth radial line R4, up to a first measuring point MP1 at which the shoulder 14 itself is farthest from the fourth radial line R4 in the closing direction, and up to a second measuring point MP2 at which the second cutting edge 13 is farthest from the fourth radial line R4 in the opposite direction of the closing direction, and the edge in this segment transitions into a convex curve toward the first measuring point MP1 and into a concave curve toward the second measuring point MP2, respectively, as viewed from the intersection s.

[0110] A manually operable cutting tool, characterized in that the first cutting edge 12 over its entire length b and the second cutting edge 13 over its approximately entire length c can overlap and move with the third cutting edge 21 of the second tool arm 2, and the third cutting edge 21 extends the total length d of the first and second cutting edges 12, 13.

[0111] A manually operable cutting tool, insofar as claim 4 does not refer to claim 3 , is characterized in that the raised shoulder 14 is formed only on the first tool arm 2 .

[0112] A manually operable cutting tool, characterized in that a third pointed connecting area 24 is constructed in the first half of the length e of the third cutting edge 21 observed from the rotation axis x, the length being measured with reference to a projection perpendicular to a third radial line R3, and the third pointed connecting area 24 also constitutes a part of the edge 29 of the opening area in the first closed position.

[0113] A manually operable cutting tool, characterized in that a third radial line R3 starting from the rotation axis x in the pivot plane E is in close contact with the third pointed connecting area 24 when viewed from the outside in the opposite direction of the closing direction S, and the third radial line does not pass through the second tool arm 3 outside the third pointed connecting area 24.

[0114] A manually operable cutting tool, characterized in that the first pointed connecting area 19 and the third pointed connecting area 24 are designed to be offset relative to each other in the radial direction R.

[0115] A manually operable cutting tool, characterized in that the third pointed connecting region 24 is arranged closer to the rotation axis x than the first pointed connecting region 19 .

[0116] A manually operable cutting tool, characterized in that the first and second cutting edges 12, 13 of the first tool arm 2 are designed as the edge 27 of the first abutment and support surface 28 of the first tool arm 2, the third cutting edge 13 of the second tool arm 3 is designed as the edge 29 of the second abutment and support surface (30) of the second tool arm (3), the first abutment and support surface 28 and the second abutment and support surface 30 move partially overlapping or align and partially overlap in a closed position, and the first and second abutment and support surfaces 28, 30 extend in or along the same continuous plane respectively.

[0117] A manually operable cutting tool, characterized in that the first cutting region 15 of the first cutting edge 12 and the first cutting region 17 of the second cutting edge 13 extend along a same second radial line R2 extending in a pivot plane E relative to the rotation axis x.

[0118] A manually operable cutting tool, characterized in that the length b of the first cutting edge 12 measured along the second radial line R2 to the most protruding point of the first cutting edge 12 in the closing direction is equal to twice or less than the protrusion size of the most protruding point along the direction perpendicular to the second radial line R2.

[0119] A manually operable cutting tool, characterized in that the first contact and support surface 28 of the first tool limb 2 is continuously formed with cutting edges 31 , 32 with a shoulder 14 and with cutting angles α, α′.

[0120] A manually operable cutting tool, characterized in that the cutting angles α, α′ are different over the length b, c of the first and / or second cutting edge 12, 13 of the first tool limb 2.

[0121] All disclosed features (on their own but also in combination with one another) are essential for the invention. The disclosure of the present application also includes the entire disclosure of the associated / additional priority documents (copies of prior applications), also for the purpose of including the features of these documents in the claims of the present application. Even without the features of the dependent claims, the dependent claims characterize independent inventive improvements over the prior art with their features, in particular for the purpose of making divisional applications based on these claims. The invention specified in each claim may also have one or more features from the preceding description, in particular those provided with reference numerals and / or given in the list of reference numerals. The present invention also relates to embodiments in which the individual features mentioned in the preceding description are not implemented, in particular when these features are dispensable for the respective purpose of use or can be replaced by other technically equivalent means.

[0122] List of Reference Numerals

[0123] 1 Cutting tools

[0124] 2 First tool arm

[0125] 3 Second tool arm

[0126] 4 Hinge pin

[0127] 5 Grip Section

[0128] 6 Grip Section

[0129] 7 Cutting pliers

[0130] 8 Cutting pliers

[0131] 9 Working surface

[0132] 10 Working surface

[0133] 11 Cutting edge

[0134] 12 The First Cutting Edge

[0135] 13 Second cutting edge

[0136] 14 Shoulders

[0137] 15 First cutting area

[0138] 16 Second cutting area

[0139] 17 First cutting area

[0140] 18 Second cutting area

[0141] 19 First connection area

[0142] 20 Second connection area

[0143] 21 Third cutting edge

[0144] 22 First cutting area

[0145] 23 Second cutting area

[0146] 24 Third connection area

[0147] 25 Cable sheath

[0148] 26 cores

[0149] 27 First Edge

[0150] 28 First contact and support surface

[0151] 29 The Second Edge

[0152] 30 Second contact and support surface

[0153] 31 Cutting edge

[0154] 32 Cutting edge

[0155] 33 Closed area

[0156] 34 Area

[0157] 35 First opening area

[0158] 36 Second opening area

[0159] 37 points

[0160] 38 Side

[0161] 39 End face

[0162] 40 points

[0163] 41 Segment

[0164] 42 Concave section

[0165] 43 lines

[0166] 44 Cable

[0167] a Vertical line

[0168] b Length

[0169] c Length

[0170] d Length

[0171] e Length

[0172] f Radius size

[0173] j Radius size

[0174] k Height

[0175] m Height

[0176] h Height

[0177] t Depth

[0178] v Protrusion size

[0179] x Rotation axis

[0180] E Pivot plane

[0181] G Straight Line

[0182] Ml size

[0183] M2 Size

[0184] MP1 Measuring point

[0185] MP2 measuring point

[0186] R Radial

[0187] R1 First radial

[0188] R2 Second radial

[0189] R3 Third radial

[0190] R4 Fourth radial

[0191] s intersection

[0192] S Closing direction

[0193] Z1 First cutting area

[0194] Z2 Second cutting area

[0195] α Cutting angle

[0196] α' cutting angle β cutting angle

Claims

1. A manually operable cutting tool (1), comprising two tool arms (2, 3), namely a first tool arm (2) and a second tool arm (3), which can be pivoted relative to one another along a pivot plane (E) about a rotation axis (x), wherein: The tool arms (2, 3) form a gripping section (5, 6) on one side of the rotation axis (x) and a cutting opening (11) on the other side, wherein the working surface (9, 10) of the cutting opening (11) is also designed with a cutting edge (12, 13, 21), and the working surface (9) of the first tool arm (2) has a first and a second cutting edge (12, 13), wherein the first cutting edge (12) of the first tool arm (2) is transformed into a closing direction (S) relative to the second cutting edge (13) at a transition section to the second cutting edge (13). ) a shoulder (14) projecting from the first tool arm (2), wherein the shoulder (14) overlaps the second tool arm (3) in the first closed position for the first time in the closed area (33) when the cutting tool (1) is moved into the closed position, wherein in the first closed position, the closed area (33) is located at the radial end of an opening area (35) remaining between the first cutting edge (12) of the first tool arm (2) and the second tool arm (3) in the first closed position, as viewed radially (R) from the axis of rotation (x), characterised in that the first cutting edge (12) of the first tool arm (2) has two first and second cutting areas (15, 16) designed radially (R) one behind the other, the first and second cutting areas transitioning into each other via a first pointed connecting area (19), wherein the first pointed connecting area (19) also forms part of an edge (27) of the opening area (35) in the first closed position and is immediately adjacent to the first radial line (R1) starting from the axis of rotation (x) in the pivot plane (E) in the direction opposite to the closing direction (S). Adjacent to the first pointed connection area (19), the first radial line penetrates the shoulder (14) approximately at half a height (h), the height being measured along a vertical line (a) perpendicular to a second radial line (R2) extending in the pivot plane (E), the second radial line (R2) contacting the lowest point (37) of the second cutting edge (13) of the first tool arm (2) as viewed opposite to the closing direction (S), wherein the vertical line (a) extends through the most protruding area (34) of the shoulder (14) along the closing direction (S).

2. A manually operable cutting tool (1) according to the features of the preamble of claim 1 or according to claim 1, characterized in that The first and second cutting edges (12, 13) of the first tool arm (2) respectively have two first and second cutting areas (15, 16 and 17, 18) arranged in sequence along the radial direction (R), and the first and second cutting areas transition to each other through first and second pointed connecting areas (19, 20), wherein these pointed connecting areas (19, 20) are respectively designed as convex transition parts, which separate the first and second cutting areas (15, 16 and 17, 18) respectively formed by concave edges (27), and a straight line (G) contacting the pointed connecting areas (19, 20) from the outside passes through a shoulder (14) formed between the first and second cutting edges (12, 13), wherein a protrusion dimension (v) of the shoulder (14) measured perpendicular to the straight line (G) is equal to four times or more of the maximum depth (t) of the area of ​​the first cutting area (17) of the second cutting edge (13) covered by the straight line (G), the maximum depth being measured perpendicular to the straight line (G) in the opposite direction from the straight line (G).

3. A manually operable cutting tool (1), comprising two tool arms (2, 3), namely a first tool arm (2) and a second tool arm (3), the first tool arm and the second tool arm being pivotable relative to one another about a rotation axis (x) along a pivot plane (E), wherein: The tool arms (2, 3) form a gripping section (5, 6) on one side of the rotation axis (x) and a cutting opening (11) on the other side, wherein the working surface (9, 10) of the cutting opening (11) is also designed with a cutting edge (12, 13, 21), and the working surface (9) of the first tool arm (2) has a first and a second cutting edge (12, 13), wherein the first cutting edge (12) of the first tool arm (2) is transformed into a shoulder (14) protruding in a closing direction (S) relative to the second cutting edge (13) at a transition section to the second cutting edge (13), wherein the shoulder (14) is When the tool (1) is moved to a closed position, it overlaps with the second tool arm (3) for the first time in the first closed position in a closed area (33), wherein, in the first closed position, as viewed radially (R) from the rotation axis (x), the closed area (33) is located at the radial end of an opening area (35) between a first cutting edge (12) of the first tool arm (2) and the second tool arm (3) which remains in the first closed position, characterized in that the first cutting edge (12) of the first tool arm (2) has two first and second cutting areas (15, 16) designed successively in the radial direction (R), the first The shoulder (14) formed on the first tool arm (2) transitions to the second cutting edge (13) via a first pointed connecting area (19), and only a fourth radial line (R4) starting from the rotation axis (x) penetrates the shoulder (14) in a radially outer section of the first edge (27) facing the second cutting edge (13), the fourth radial line penetrating the shoulder (14) at the intersection point (s) in a section approximately midway at the height of the shoulder (14) with reference to the intersection point (s), and about half or more of the length of the radially outer section is along the intersection point (s) with the fourth radial line (R4) The height is derived from the dimensions (M1, M2) measured perpendicularly to the fourth radial line (R4) up to a first measuring point (MP1) at which the shoulder (14) itself is farthest from the fourth radial line (R4) in the closing direction and up to a second measuring point (MP2) at which the second cutting edge (13) is farthest from the fourth radial line (R4) in the opposite direction of the closing direction, and the edge in this section transitions from the intersection point (s) towards the first measuring point (MP1) into a convex curvature and towards the second measuring point (MP2) into a concave curvature, respectively.

4. A cutting tool according to any preceding claim, characterised in that The first cutting edge (12) is movable and overlapping with a third cutting edge (21) of the second tool arm (2) over its entire length (b) and the second cutting edge (13) is movable and overlapping with a third cutting edge (21) of the second tool arm (2) over its entire length (b), and the third cutting edge (21) extends the total length (d) of the first and second cutting edges (12, 13).

5. A cutting tool according to claim 1, 2 or 4, as long as claim 4 does not refer to claim 3, characterized in that The raised shoulder (14) is formed only on the first tool arm (2).

6. A cutting tool according to any preceding claim, characterised in that A third pointed connecting area (24) is constructed in the first half of the length (e) of the third cutting edge (21) as viewed from the rotation axis (x), the length being measured with reference to a projection perpendicular to a third radial line (R3), and the third pointed connecting area (24) also constitutes a part of the edge (29) of the opening area in the first closed position.

7. The cutting tool according to claim 6, characterized in that A third radial line (R3) starting from the rotation axis (x) in the pivot plane (E) is close to the third pointed connecting area (24) from the outside when viewed in the opposite direction of the closing direction (S), and the third radial line does not pass through the second tool arm (3) outside the third pointed connecting area (24).

8. A cutting tool according to any preceding claim, characterised in that The first pointed connecting region (19) and the third pointed connecting region (24) are designed to be offset relative to each other in the radial direction (R).

9. The cutting tool according to claim 8, characterized in that The third pointed connecting region (24) is designed closer to the axis of rotation (x) than the first pointed connecting region (19).

10. A cutting tool according to any preceding claim, characterised in that The first and second cutting edges (12, 13) of the first tool arm (2) are designed as edges (27) of a first abutment and support surface (28) of the first tool arm (2), and the third cutting edge (13) of the second tool arm (3) is designed as an edge (29) of a second abutment and support surface (30) of the second tool arm (3), the first abutment and support surface (28) and the second abutment and support surface (30) partially move or align and partially overlap in a closed position, and the first and second abutment and support surfaces (28, 30) extend in or along the same continuous plane respectively.

11. A cutting tool according to any preceding claim, characterised in that The first cutting area (15) of the first cutting edge (12) and the first cutting area (17) of the second cutting edge (13) extend along a same second radial line (R2) extending in the pivot plane (E) relative to the rotation axis (x).

12. A cutting tool according to any preceding claim, characterised in that The length (b) of the first cutting edge (12) measured along the second radial line (R2) to the most protruding point of the first cutting edge (12) in the closing direction is equal to twice or less the protrusion dimension of the most protruding point in the direction perpendicular to the second radial line (R2).

13. A cutting tool according to any preceding claim, characterised in that The first contact and support surface (28) of the first tool arm (2) is continuously configured with a cutting edge (31, 32) having a cutting angle (α, α') and including a shoulder (14).

14. The cutting tool according to claim 13, characterized in that The cutting angles (α, α') are different over the length (b, c) of the first and / or second cutting edge (12, 13) of the first tool limb (2).

Images