Manually operated cutting tools

Abstract

The present invention relates to a manually operable cutting tool 1 having a first tool leg 2 and a second tool leg 3 centered on a rotation axis x. The tool legs 2, 3 form a cutting opening 11, the working surfaces 9, 10 of which are formed with cutting edges 12, 13, 21, the working surface 9 of the first tool leg 2 having first and second cutting edges 12, 13, the first cutting edge 12 transitioning into the second cutting edge 13 via a protruding shoulder 14 which lies in a position overlapping the second tool leg 3 such that an open area 35 remains between the cutting edges of the tool legs 2, 3.

Description

[Technical Field]

[0001] The present invention relates to a manually operable cutting tool having two tool legs, i.e., first and second tool legs, pivotable relative to one another along a pivot plane about a rotation axis, the tool legs having a handle portion on one side of the rotation axis and a cutting opening on the other side of the rotation axis. Furthermore, the working surface of the cutting opening is formed by a cutting blade, the working surface of the first tool leg having first and second cutting blades, the first cutting blade of the first tool leg transitioning at a transition to the second cutting blade into a shoulder projecting in a closing direction relative to the second cutting blade. During movement of the cutting tool to a closed position, the shoulder first overlaps the second tool leg in a closing region in the initial closed position. The closing region in the initial closed position is formed at a radial end of the open region remaining between the first cutting blade of the first tool leg and the second tool leg in the initial closed position, as viewed radially from the rotation axis. [Background technology]

[0002] This type of cutting tool in question is primarily used to cut cables and wires, the materials of which are, for example, copper, steel, fiberglass, etc. Cutting tools of this type are also called cable cutters or cable cutting pliers. The handles of pliers-like cutting tools are realized in the form of an elongated rod and usually without eyelet-like through-holes for fingers, which are typically provided on scissors.

[0003] A cutting tool of this type is known from US Pat. No. 5,699,499. This cutting tool is realized in the form of pliers and has first and second cutting blades on both tool legs, which are arranged consecutively in the radial direction starting from the rotation axis. The first and second cutting blades are separated from each other by a shoulder that protrudes toward the second cutting blade. The second cutting blades are formed in a manner that they contact each other like side cutters. The pliers opening is realized by the cutting blade extending in a continuously rounded manner relative to the first cutting blade. The second cutting blade, which is spaced apart from the first cutting blade and extends continuously linearly in the cutting surface relative to the first cutting blade, can only complete the cutting process when the pliers are fully closed. This cutting tool is not well suited to cutting multi-core cables.

[0004] Patent Document 2 discloses a pliers-like cutting tool, the cutting blades of which first overlap in the radially outermost region during the tool closing process. In this initial closed position, multiple cutting regions, each with its own curvature profile and collectively forming an opening region, are formed radially inward. Identical cutting regions are formed on both tool legs. These cutting regions are separated from each other by pointed connecting regions, which contribute to forming the outer edge of the opening profile in the aforementioned initial closed position. While this cutting tool can reliably cut cables, it cannot be used to perform other preparatory or supplementary cutting steps, such as initial cutting or stripping, in a practically precise manner.

[0005] Patent Document 3 discloses pruning shears in which, in the aforementioned closed position, substantially straight cutting blades are formed on one of the pliers legs radially outward and radially inward relative to the first overlapping position. The cutting blade of the other tool leg, which extends substantially slightly curved and continuously concave with respect to the aforementioned opening contour, abuts the substantially straight cutting blade. One tool leg has a stepped transition section extending convexly from the first to the second cutting blade, where the cutting blade shape is also continuously realized, while the other tool leg has a convexly rounded connecting region that protrudes and overlaps with the stepped transition section of the first tool leg in the aforementioned initial closed position. Pruning shears are not well suited to cutting cables. In the case of cables, the cutting surface can be relatively high due to the shape of the cutting blades. In the initial closed position, the cutting opening is already substantially closed relative to the second cutting blade. A similar prior art is also disclosed in Patent Document 4. For further relevant prior art, see US Pat. Nos. 5,629,995, 5,799,112, 5,799,122 and 5,899,133. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] DE 10 2009 044 107 [Patent Document 2] International Publication No. 2021 / 160 549 [Patent Document 3] U.S. Patent No. 1,520,529 [Patent Document 4] U.S. Patent No. 3,461,555 [Patent Document 5] German Utility Model No. 297 033 08 [Patent Document 6] German Patent No. 195 064 57 [Patent Document 7] German Utility Model No. 295 025 91 Summary of the Invention [Problem to be solved by the invention]

[0007] There is a need for a cutting tool that, on the one hand, allows cables, especially cables with multiple wires, to be cut well, and, on the other hand, allows the wires to be stripped well by first cutting through the cable sheath, without the need for a complete cut. [Means for solving the problem]

[0008] Based on the prior art cited at the outset, the present invention aims to disclose a cutting tool that is particularly well realized in the form of a cable cutter and that can preferably be handled as ergonomically and conveniently as possible.

[0009] The above object can be achieved by a cutting tool according to a first inventive idea, in which a first cutting edge of a first tool leg has two first and second cutting regions that are arranged successively in the radial direction and merge into one another via a first pointed connecting region that forms part of the outer edge of the opening region in the initial closed position, and a first radius that starts on the pivoting surface from the rotation axis and abuts the first pointed connecting region from the outside when viewed in the opposite direction to the closing direction extends through the shoulder at a height approximately half the height of the shoulder measured on a perpendicular to a second radius extending on the pivoting surface, the second radius contacting the second cutting edge of the first tool leg at its lowest point when viewed in the opposite direction to the pivoting direction, the perpendicular extending through the area of the shoulder that protrudes most in the pivoting direction.

[0010] The above-mentioned object can further be achieved by the first and second cutting blades of the first tool leg each having two first and second cutting regions arranged successively in the radial direction and transitioning into each other via first and second pointed connecting regions. The pointed connecting regions are realized in the form of a convex transition dividing the first and second cutting regions, each formed by a concave outer edge. A straight line arranged in abutment against the pointed connecting regions from the outside extends through a shoulder formed between the first and second cutting blades. The protruding dimension of the shoulder measured perpendicular to the straight line corresponds to at least four times the maximum depth of the area spanned by the straight line in the first cutting region of the second cutting blade. The depth is measured from the straight line in a direction opposite to the straight line.

[0011] A further possible solution to the object is achieved by the first cutting blade of the first tool leg having two radially consecutively arranged first and second cutting regions that transition into one another via a first pointed connecting region, and by the shoulder formed only on the first tool leg being divided into a radially outer part of its first outer edge facing the second cutting blade by a fourth radius extending from the rotation axis, the fourth radius extending through the shoulder at a point of intersection approximately in the middle of the shoulder's height, the fourth radius extending along a tangent to the fourth radius at the point of intersection for approximately half or more of its length. The height of the shoulder is obtained by measuring perpendicularly to the fourth radius from the intersection point to the first dimension point on the shoulder itself that is farthest in the closing direction, and from the intersection point to the second dimension point on the second cutting edge that is farthest in the opposite direction to the closing direction. The outer edge of this part transitions from the intersection point in a convex curve to the first dimension point and in a concave curve to the second dimension point.

[0012] This results in a shoulder that is steep, but with a curved transition radially inward and radially outward. This allows for a favorable continuous cut regardless of the shoulder, especially if the shoulder is favorably designed as a cutting edge overall. The resulting relatively steep shoulder also favorably separates the first cutting edge from the second cutting edge or the remaining opening area in the initial closed position.

[0013] Each of the presented embodiments, but possibly also a combination of the individual features of the presented solutions, can achieve an improved cutting result, for example when cutting cables, especially electrical cables, if the cutting tool is handled appropriately by the user. In particular, the radial division of the cutting blade of the first tool leg results in continuously formed cutting areas that transition into one another via the pointed connection area, resulting in a cutting opening that is closed on all sides, especially when the opening area is separated by a shoulder in the initial closed position. In this case, cables of any size can be inserted completely around their circumference and then preferably cut with a favorable initial cut by the preceding pointed connection area. The relatively large shoulder under certain conditions, and at the same time, the second cutting area of the first cutting blade rising radially outward toward the shoulder, allow for a favorable pick-up of the cable to be cut and a favorable cut-off force balance. In particular, an additional second cutting blade can also be used to perform a favorable preliminary cut of the cable using the same cutting tool.

[0014] Starting from the initial closed position, only the second cutting blade, which extends radially outward relative to the shoulder, can be used to make an initial cut in the cable if necessary, but only from the radially outward direction, without the risk of the entire cable reaching the area of the first cutting blade or being completely cut by the shoulder. A relatively high shoulder, i.e., one that projects significantly in the closing direction, blocks the first cutting blade, so to speak, at an early stage during such a cutting process.

[0015] When cutting with the first cutting blade, the pointed connection area separating the concave outer edges of the cutting areas of the first cutting blade from each other can, during the cutting operation, produce a substantially point-like cutting load and a corresponding cut on the workpiece to be cut, for example a cable, and from this point-like load caused by the pointed connection area, during further cutting closing operations from both sides, the cutting process continues in a substantially circumferential direction of the workpiece to be cut. In this way, advantageously, a single cut can first be made across the circumference or extension of the cutting blade of the workpiece to be cut, and preferably multiple individual cuts can be made which, in cooperation with the cutting blade of the other tool leg, can complement each other to form an overall cut across the entire cross section of the workpiece to be cut, thereby allowing the cut to be made with a relatively low cutting force. Due to the predetermined geometrical allocation in which the first radius extending from the rotation axis in the pivot plane and abutting the first pointed connecting region passes through the shoulder from the outside at approximately half its height, the relatively large free extension of the shoulder in the closing direction continues, together with the rise towards the shoulder of the second cutting region of the first cutting edge, preferably up to the apex or apex region of the shoulder.

[0016] The first and second cutting regions of the first and second cutting blades are located on the same cutting plane together with the shoulder, and preferably the shoulder also has an outer edge region formed as a cutting blade along part or all of its periphery.

[0017] In a further possible geometrical assignment, a straight line drawn from the outside to the pointed connecting regions of both the first and second cutting blades of the first tool leg extends through the shoulder formed between the first and second cutting blades. This provides the shoulder with a protruding dimension perpendicular to the line, indicating the shoulder's distance from the line, which corresponds to at least four times the maximum depth of the first cutting region of the second cutting blade that the line spans, measured from the same line. Additionally or alternatively, this represents a relatively large ratio between the shoulder and the recess of the first cutting region of the second cutting blade. This embodiment also provides the advantages of the cutting tool described herein, as already explained.

[0018] The connection region forms a roof-like or rounded, in particular a convex, tip, but can alternatively also form a flat tip region, for example with straight faces.

[0019] Different machining areas can also be provided by subdivision of one or more cutting blades of the first tool leg. For example, a concave first cutting area of a second cutting blade, adjacent to and radially inward of the second cutting area of the second cutting blade, can be used as a stripping area in cooperation with a third cutting blade. A concave design formed on one of the cutting blades of the first and second tool legs can also be used for stripping.

[0020] In addition to delimiting the opening in the area of the second cutting blade in the initial closed position, the shoulder also provides a depth stop for the workpiece in the area of the second cutting blade, so that the workpiece cannot reach and penetrate radially inward into the area of the first cutting blade during the desired processing in the area of the second cutting blade.

[0021] The shoulder embodiment divides the cutting opening into radial individual cutting zones relative to the axis of rotation, so that by spreading the handles of the cutting tool, the shoulder can be pivoted into a position that opens the passage between the radially outer cutting zone and the radially inner cutting zone, allowing the object to be cut to be inserted in the area of the first cutting blade of the first tool leg.

[0022] As a result of the selected geometry, for example with respect to the height of the shoulder relative to the maximum depth of the second cutting blade, the use of a radially outer second cutting blade, and in particular the use of a radially outer end region of the second cutting blade, has resulted in a cutting tool that can also be worked in a more user-friendly manner without having to accept the disadvantage of a large leg width of the tool leg in the handle region, for example this end region of the second cutting blade being used for cutting or stripping cable sheaths (so-called "nibbling") and also for stripping wires, for example.

[0023] The first radius can extend past the shoulder approximately halfway through its height, and a percentage of the perpendicular between the first radius and the most protruding region of the shoulder can correspond to approximately 40-60% of the entire perpendicular between the second radius and the most protruding region of the shoulder.

[0024] The protruding dimension may also correspond to about 4 to 8 times, and further for example, 4.5 to 6.5 times, the maximum depth of the region of the second cutting edge measured by a line connecting the connecting regions.

[0025] The features of the above independent claims may be of importance both on their own and in combination with one another, and features of one independent claim may be combined with features of another independent claim or with features of several independent claims. Furthermore, an independent claim may comprise only one or several individual features of the other independent claims.

[0026] Further features of the invention are set out below, including the description of the drawings, in the subject matter of claim 1 and / or in a preferred allocation to the features of the further independent claim 2 or other claims, although they may also be important in the allocation of only individual features of claim 1 and / or the further independent claim 2, or only individual features of the respective further claims, or independently in each case.

[0027] This allows, according to an embodiment, to provide that the first cutting blade is movable over its entire length and the second cutting blade is movable over substantially its entire length, with the third cutting blade of the second tool leg extending over the combined length of the first and second cutting blades.

[0028] The third cutting blade of the second tool leg is preferably designed for corresponding cutting interaction with both the first and second cutting blades of the first tool leg, such that during the closing cutting motion, the cutting blades of the first and second tool legs move over one another in a scissors-like manner.

[0029] In another preferred method, the protruding shoulder is formed only (exclusively) on the first tool leg. This offers particular advantages with regard to the opening of the radially inner cutting area by the first cutting blade or the opening of the passage between the radially outer and inner cutting areas, since this requires a relatively small expansion of the handle compared to an arrangement in which both tool legs have protruding shoulders. With regard to the cutting blade facing the outer edge of the tool leg, i.e. the cutting opening, such an asymmetric embodiment of the tool leg is preferred.

[0030] The shoulder is an embodiment of a first tool leg, which in the initial closed position is arranged in a "first" layer with the second tool leg (on which the cutting blade is formed in this case). In the initial closed position, the pointed connection region is part of the remaining open area or part of the second cutting blade that extends freely outward from the free opening of the first tool leg. Similarly, with respect to one or more pointed connection regions of the cutting blade of the second tool leg, such connection region is either part of the open area or part of the cutting blade that extends freely radially outward toward the shoulder. In the closed position, it is further preferred that with respect to the second tool leg, a portion of the cutting edge of the second tool leg, which extends substantially along a radius and is preferably substantially straight, is in an overlapping position against the shoulder.

[0031] The third pointed connecting region can be formed in the first half of the length of the third cutting blade measured in a perpendicular projection onto the third radius extending on the pivot plane, as viewed from the axis of rotation, so that the third pointed connecting region also forms part of the outer edge of the opening region in the initial closed position. This third pointed connecting region can be formed as a convex transition like the first connecting region of the first cutting blade described above. The third pointed connecting region separates adjacent cutting regions of the third cutting blade, and these cutting regions are preferably formed with concave outer edges. As a result of this further preferred embodiment, a supporting influence occurs in the region of the first cutting edge or the first cutting zone in the course of the cutting process.

[0032] In a further embodiment, a third cutting edge embodiment can be created, in which a third radius extending from the rotation axis on the pivot surface abuts the third pointed connection region from the outside when viewed in the closing direction and does not pass through the second tool leg, i.e., in particular, does not pass through a further region of the third cutting edge formed on the second tool leg after passing the third pointed connection region. Rather, such a radius, which starts from the rotation axis and preferably abuts or contacts the connection region, extends freely radially outward in one direction (possibly extending only through the first tool leg, depending on the closing position of the tool legs). Therefore, furthermore, the cutting region radially adjacent to the third connection region on the third cutting blade on the outside extends continuously a predetermined distance beyond the third radius (as viewed from the first tool leg), whereas the cutting region radially adjacent to the third connection region on the third cutting blade on the inside, possibly for example the radially inner end of the outer edge delimiting the opening region, can reliably intersect the third radius in the pivot plane.

[0033] The first and third pointed connection regions can be spaced apart from one another in the radial direction. This is preferably selected with respect to the measured movement dimension so that the first and third connection regions do not move directly or significantly over one another during the process of closing the opening between the first and third cutting blades. Thus, the first and third pointed connection regions move on circumferential paths with different radii during the pivoting movement of the tool leg about the rotation axis. This allows a workpiece picked up in the area of the first cutting blade, for example for cutting or severing a cable, to be cut radially relative to the rotation axis at high speed, contributing to a favorable cutting process.

[0034] According to a preferred embodiment, the third pointed connection region of the third cutting blade is further provided to be formed closer to the rotation axis than the first pointed connection region of the first cutting blade. For example, the most protruding point in the closing direction of the first pointed connection region can move on a circumferential line, the radius of which can correspond to about 1.1 to 1.5 times, for example about 1.25 times, the radius defining the circumferential line of the most protruding point in the closing direction of the third pointed connection region.

[0035] In further embodiments, the radial dimension of the circumferential line along which the third pointed connection region may move may correspond to about 0.4 to 0.6 times, and even about 0.5 times, the radial dimension of the circumferential line along which the most protruding region or point in the closing direction of the shoulder moves.

[0036] The first and second cutting edges of the first tool leg may be formed as outer edges of the first contact support surface of the first tool leg. Furthermore, the third cutting edge of the second tool leg may be formed as an outer edge of the second contact support surface of the second tool leg. In the closed position, the first contact support surface is flush with, i.e., aligned with, the second contact support surface. The first and second contact support surfaces may each extend on the same continuous plane. Preferably, this continuous plane is a pivoted plane extending perpendicular to the axis.

[0037] In a further embodiment, the first portion of the first cutting blade and the first portion of the second cutting blade may extend along (substantially) the same second radius extending in a plane of rotation about the axis of rotation. If the second radius is tangent to the outer edge of the first portion of the first cutting blade or the outer edge of the first portion of the second cutting blade, the other first portion of the other cutting blade may have a distance to the other first portion, possibly perpendicular to the second radius. The distance is preferably less than 1 mm, 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 blade measured on this second radius to its most protruding point in the closing direction can correspond to no more than about twice the protruding dimension perpendicular to the second radius at this point. Furthermore, this most protruding point of the first cutting blade can be formed by the most protruding point of the shoulder, such that the shoulder forms a part of the first cutting blade corresponding to the first radially inner cutting zone, i.e., part of the second cutting region of the first cutting blade.

[0039] The cutting edge of the second tool leg, i.e. the third cutting edge, also preferably extends along its entire radial length in the same plane, i.e. in fact in the swivel plane, which also corresponds to the cutting plane.

[0040] In a further embodiment, the first contact support surface of the first tool can be formed continuously with a shoulder and have a cutting edge with a cutting angle, whereby the shoulder is still preferably part of the first and / or second cutting edge of the first tool leg, and in this regard it is still preferred that the flank of the shoulder extends substantially along the shoulder direction but also in the circumferential direction.

[0041] The cutting angle may vary over the length of the first and / or second cutting blade of the first tool leg. Thus, in the immediate region of the first and / or second cutting blade embodiment, it may have a normal cutting angle of about 20 to about 40°, or even, for example, about 35°. In addition, preferably also in the flank region of the shoulder facing the first cutting blade, but also, for example, in the flank region of the shoulder facing the second cutting blade, it may have a larger cutting angle, for example, of 75 to 88°, for example, about 85°.

[0042] The ranges or ranges of values specified above and below, or ranges of ranges, include all intermediate values in the disclosure, in particular 1 / 10 steps in the respective dimensions, i.e., in some cases, no dimensions. For example, a statement of 20-40° also includes a disclosure of 20.1-40°, 20-39.9°, 20.1-39.9°, etc., and a disclosure of 4-8x also includes a disclosure of 4.1-8x, 4-7.9x, 4.1-7.9x, etc. The disclosure may, on the one hand, serve to limit the boundaries of the specified ranges from above and / or below, but may alternatively or additionally serve to disclose one or more specific values from each specified range. [Brief explanation of the drawings]

[0043] The invention will now be described with reference to the accompanying drawings, which show exemplary embodiments only. [Figure 1] FIG. 1 is a perspective view of the cutting tool with the cutting mouth in a closed position. [Figure 2] FIG. 2 is a side view of the cutting tool along arrow 11 in FIG. [Figure 3]FIG. 3 is yet another side view of the cutting tool taken along arrow III in FIG. [Figure 4] FIG. 4 is yet another side view of the cutting tool along arrow IV in FIG. [Figure 5] FIG. 5 is a view of the cutting tool taken along arrow V in FIG. [Figure 6] FIG. 6 is a top view of the cutting tool. [Figure 7] FIG. 7 is a bottom view of the cutting tool. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a view from the perspective of FIG. 3 when using the first cutting region of the second cutting blade. [Figure 10] FIG. 10 is an enlarged view of region X in FIG. [Figure 11] FIG. 11 is a view substantially similar to FIG. 9, but using a second cutting region of a second cutting blade. [Figure 12] FIG. 12 is an enlarged view of region XII in FIG. [Figure 13] FIG. 13 is a view substantially similar to FIG. 9, but using the first cutting blade of the cutting tool. [Figure 14] FIG. 14 is an enlarged view of region XIV in FIG. [Figure 15] FIG. 15 is a view substantially equivalent to FIG. 9, showing an alternative use of the first cutting blade of the cutting tool. [Figure 16] FIG. 16 is an enlarged view of region XVI in FIG. [Figure 17] FIG. 17 is an enlarged view of region XVII in FIG. [Figure 18] FIG. 18 is a view substantially the same as FIG. 17, but for the initial closed position of the cutting tool. [Figure 19] FIG. 19 is an enlarged, separate view of a second tool leg of a cutting tool with a first cutting blade and a second cutting blade and a shoulder formed therebetween. [Figure 20] FIG. 20 is a further enlarged view of area XX in FIG. [Figure 21] FIG. 21 is an enlarged, separate view of the second tool leg of the cutting tool with the third cutting blade. [Figure 22] FIG. 22 is a cross-sectional view taken along line XXII-XXII in FIG. [Figure 23] FIG. 23 is a cross-sectional view taken along line XXIII-XXIII in FIG. [Figure 24-30] 24-30 are further views of the cutting tool. [Figure 31] FIG. 31 is a further view along the lines of FIG. 19, showing further features of the cutout relative to the shoulder. DETAILED DESCRIPTION OF THE INVENTION

[0044] 1 to 7, a manually operable cutting tool 1 is shown and described, preferably in the form of a cable cutter with a first tool leg 2 and a second tool leg 3, which intersect each other at a pivot bolt 4 (joint) and are thus pivotable relative to each other in a pivot plane E about a geometrical axis of rotation x formed by the pivot bolt 4. The axis of rotation x is preferably perpendicular to the pivot plane E.

[0045] Each of the tool legs 2 and 3 forms a handle portion 5 or 6 on one side of the pivot bolt 4 and a cutting jaw 7 or 8 on the other side of the pivot bolt 4. The cutting jaws 7 and 8, each provided with a working surface 9 and 10, delimit a cutting wall, at least in the open position, e.g., in Fig. 14. The working surfaces 9 and 10 are designed substantially as cutting blades, as will be described below or throughout.

[0046] If a substantially at least approximately symmetrical embodiment of the tool legs 2 and 3 is preferred, an asymmetrical design is preferred, in particular with regard to the design of the handle parts 5 and 6 and the outer contours of the cutting jaws 7 and 8, and 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 leg 2 is preferably formed differently from the working surface 8 of the second tool leg 3. In this embodiment, the tool legs cannot overlap each other by rotating about their longitudinal axes.

[0047] 19, the cutting jaw 7 of the first tool leg 2 is provided with two cutting edges arranged successively in a radial direction R relative to the axis of rotation x: a radially inner first cutting edge 12 and a radially outer second cutting edge 13. At the transition to the second cutting edge 13, the first cutting edge 12 transitions into a shoulder 14 which projects in the closing direction S of the cutting tool 1, in particular relative to the second cutting edge 13.

[0048] Both cutting edges 12 and 13 are preferably divided into two cutting regions arranged successively in the radial direction R, such that the first cutting edge 12 is divided into a first cutting region 15 and a second cutting region 16, and the second cutting edge 13 is preferably divided into a first cutting region 17 and a second cutting region 18. Cutting regions 15 and 16 transition into one another via a first pointed connecting region 19, and cutting regions 17 and 18 preferably transition into one another via a second pointed connecting region 20.

[0049] In contrast, the cutting jaw 8 of the second tool leg 3 is preferably provided with only one cutting edge (third cutting edge) 21, which, viewed radially, is essentially divided into a first cutting region 22 and a second cutting region 23, which also preferably transition into each other only via a third pointed connecting region 24 (see also the detailed view in Figure 21).

[0050] The pointed connection regions 19, 20 and 24 are each formed as a transition that is substantially convexly curved when viewed in the (respective) closing direction S and are connected on both sides by cutting regions that are also concavely curved when viewed in the closing direction S. The connecting regions therefore project pointedly in the closing direction S relative to the adjacent cutting regions, so that the cutting regions on both sides are separated by the connecting regions.

[0051] This allows the user to use one or the other cutting area, for example the area of the second cutting blade, in the desired manner, for example the radially outer second cutting area 18 as shown in Figures 11 and 12, preferably for example to cut the cable sheath 25, while further using the radially inner first cutting area 17 of this second cutting blade 13 in the desired manner, for example to strip the coating of the wire 26 (see Figures 9 and 10).

[0052] Furthermore, cutting areas separated by connecting areas can also be used in combination, in particular for cutting cables 44 of different diameters (see Figures 13 to 16), and in particular for the cutting areas 15 and 16 of the first cutting blade 12 radially inner of the first tool leg 2.

[0053] The first cutting edge 12, together with the second cutting edge 13 and the shoulder 14, forms a first outer edge surrounding the cutting opening and at the same time forms the boundary of a first contact support surface 28 of the first tool leg 2 in the area of the cutting jaw 7, which first contact support surface 28 extends in the pivot plane E opposite the opposite tool leg 3. A second outer edge 29, which further surrounds the cutting opening, is formed by the third cutting edge 21 of the second tool leg 3. Here too, this outer edge 29 forms the boundary of a second contact support surface 30 of the second tool leg in the region of the cutting jaw 8, which contact support surface 30 extends correspondingly on the pivot plane E. 17, both contact bearing surfaces 28 and 30 rest on top of each other, with the associated outer edges 27 and 29 passing each other. The contact bearing surfaces 28 and 30 extend in substantially the same plane, i.e., the plane of rotation E. In this closed position, the first contact bearing surface 28 and the second contact bearing surface 30 pass each other at different radial distances, but preferably overlap each other only in part of their respective areas.

[0054] The first contact support surface 28 of the first tool leg 2 is provided successively with a cutting edge 31 including the first cutting edge 12, the second cutting edge 13 and the shoulder 14 and having a cutting angle α, while the second contact support surface 30 is likewise provided with a cutting edge 32 having a cutting angle β (see Figures 22 and 23). Accordingly, the shoulder 14 separating the first cutting edge 12 from the second cutting edge 13 may also be formed along its outer edge with a cutting edge running freely circumferentially between the cutting edges 12 and 13, which cutting edge forms the second outer edge 27. Furthermore, the corresponding outer end of the shoulder 14 facing the first cutting edge 12 is formed as a cutting edge 31 with substantially the same cutting angle α as the region of the first cutting edge 12, for example of about 20 to 40°, further for example of about 35°. On the other hand, preferably, the radially outer end of the first outer edge 27 or shoulder flank 38 in the cross section of Figure 22, which faces the second cutting edge 13, can have a cutting angle α' that is larger than the usual cutting angle α of about 20 to 40 degrees, for example, 80 to 85 degrees, and in some cases up to 89 degrees.

[0055] During the pivoting displacement of the tool legs 2 and 3 relative to one another in the closing direction S, an initial closing position occurs (see FIG. 18 ) in which the shoulder 14 of the first tool leg 2 first comes into abutment with the second tool leg 3, in this case in particular with the third cutting edge 21, in a closing region 33. This closing region 33 can preferably be defined by a region 34 of the shoulder 14 which projects most in the closing direction S. In that case, in the perspective of FIG. 18 , in which the axis of rotation x is shown as a point, this region 34 can appear as a point or as a straight section running substantially radially to the axis of rotation, as shown in FIG. 18 .

[0056] 18, a first open area 35 remains between the first cutting blade 12 of the first tool leg 2 and the third cutting blade 21 of the second tool leg 3, the first open area 35 being closed around its periphery by the outer edges 27 and 29 of the cutting blades 12 and 21. A closed area 33 is provided in this initial closed position in the radial direction R at the radial end of the open area 35 when viewed from the axis of rotation x.

[0057] As further shown in Figure 18, in this initial closed position of the cutting tool 1, there is a second open area 36 that is still open radially outward between the second cutting blade 13 of the first tool leg 2 and the part of the third cutting blade 21 of the second tool leg 3 that projects radially outward through the closed area 33.

[0058] 19, the first radius R1, which starts from the rotation axis x and is seen in the direction opposite to the closing direction S, abuts the first pointed connecting region 19 of the first cutting edge 12 from the outside, passes through the area of the second cutting region 16 of the first cutting edge 12 adjacent to the first connecting region 19 and the shoulder 14 adjacent thereto, and then flows freely outward in the area of the steep flank 38 of the shoulder 14. The shoulder 14 extends into the first cutting region 17 of the second cutting edge 13, which is associated only with the first tool leg 2. In this case, the first radius R1 runs in a tendon-like manner around the concave outer edge of the first cutting region 15 of the first cutting edge 12.

[0059] The first radius R1 extends through the shoulder 14 in a region of approximately half the height h, the height h being measured along a perpendicular line a located between the second radius R2 and the most protruding region 34 of the shoulder 14 in the closing direction S (which may also be a point depending on the shape of the outer edge of the shoulder). The second radius R2 contacts the second cutting edge 13 of the first tool leg 2 at a lowest point 37 when viewed in the opposite direction to the pivot direction S. The perpendicular line a is related to the second radius R2. Preferably, the lowest point 37 is in the region of the first cutting region 17 of the second cutting edge 13.

[0060] As further shown in FIG. 19, the second radius R2, in addition to contacting at point 37 in the region of the second cutting edge 13, can also be substantially in contact with the first cutting edge 12 in the region of the first cutting region 15 at the same time, at a relatively small distance to the applied tangent, preferably less than 1 mm, more preferably a few tenths of a mm, for example 0.2 or 0.3 mm, in some cases.

[0061] The second radius R2 further preferably starts from the axis of rotation x and extends completely to its exit in the region of the front face 39 of the first tool leg 2, passing completely through the tool leg 2, i.e. the cutting jaw 7. The second radius R2 preferably starts from the axis of rotation x and exits only in the region of the front face 39.

[0062] Starting from the lowest point 37 of the second cutting blade 13 in the region of the first cutting region 17, the further path of the second cutting blade 13, in particular with respect to the second cutting region 18 and the second connecting region 20, is at a distance corresponding to the above-mentioned second radius R2, so that with respect to a highest point 40 of the second cutting blade 13 as seen in the closing direction S, which here is the highest point of the second cutting region 18 of the second cutting blade 13, a height k can be set along a perpendicular to the radius R2, which height k may correspond to approximately 1 / 10 to 1 / 4, for example approximately 1 / 6, of the above-mentioned height h of the shoulder 14 starting from the same second radius R2.

[0063] Starting substantially from the most protruding region 34 of the shoulder 14, the length b of the first cutting edge 12 and the length c of the second cutting edge 13 occur along the radius, and the length c of the second cutting edge 13 may correspond to about 0.4 to 0.7 times, for example about 0.5 to 0.6 times, the length b of the first cutting edge 12. This results in a total length d of the cutting edges 12 and 13, which length d corresponds substantially to the length e of the third cutting edge 21, also measured radially. In addition, the length b of the second cutting edge 12 may preferably correspond to about 1.5 to 2 times the protruding dimension, i.e., height h, perpendicular to the second radius R2 in the region of the shoulder 14.

[0064] 20, an enlarged cutaway view of the first tool leg 2, viewed in the direction opposite to the closing direction S, depicts a straight line G that is located on the pointed connecting regions 19 and 20 of the first and second cutting edges 12, 13 and preferably contacts these connecting regions in a pointed manner. The straight line G runs through the shoulder 14, passes tendon-like over the concave outer edge of the first cutting region 17 of the second cutting edge 13, then re-enters the cutting jaw 7 and exits at the end in the region of the front face 39.

[0065] This results in a shoulder projection dimension v, measured perpendicular to the line G, between the line G and the most projecting region 34 of the shoulder 14, i.e., the most projecting point of the first cutting edge 12. The most projecting point of the first cutting edge 12 may be formed by the region 34 of the shoulder 14. This projection dimension v may correspond to four or more times, for example up to five or six times, the maximum depth t, which starts from the line G in the opposite direction to the projection dimension v to a point 37 in the first cutting region 17 crossed by the line G at the second cutting edge 13 (see FIG. 20). The height m extending from the straight line G in the direction of the protrusion dimension v in the region of the highest point 40 of the second cutting edge 13 can correspond to about 1 / 10 to 1 / 5 of the protrusion dimension v, or even about 1 / 6, for example.

[0066] A third radius R3 (see FIG. 21 ), also originating from the rotation axis x, is located on the third connection area 24 when viewed in the direction opposite the closing direction S of the second tool leg 3 and can extend radially outwardly beyond this third connection area 24 with respect to the second tool leg 3, i.e. without passing through the tool leg 3.

[0067] The third connecting region 24 is related to the length e of the third cutting blade 21 and is preferably located in the first half of the length e (as viewed from the axis of rotation x), more preferably in the first quarter to the first third of the length e.

[0068] In a further preferred embodiment, the pointed connection regions 19 and 24 of the first cutting edge 12 and the third cutting edge 21 are spaced apart from each other when viewed in the radial direction R. In that case, it is even more preferred that the third pointed connection region 24 is formed closer to the axis of rotation x than the first connection region 19. Thus, as shown in Figures 19 and 21, the radial dimension f of the third connection region 24 can be obtained from this point of view and can correspond to about 0.6 to 0.9 times, further for example about 0.7 to 0.8 times the radial dimension j of the first connection region 19.

[0069] In a further embodiment, the third cutting edge 21 can have, in the region of its second cutting region 23, first a concave portion that transitions radially outward from the third connecting region 24 into a substantially straight portion 41. In the region of the radially outer end of this straight portion 41, a further concave portion 42 can follow, which ends at a radial end on an imaginary line 43 that extends beyond the straight portion 41 (see FIG. 21 ).

[0070] According to the embodiment presented, there are in particular two cutting zones Z1 and Z2, which are substantially separated from one another by a protruding shoulder 14. The cutting zone Z1 occurs between the first cutting edge 12 of the first tool leg 2 and the third cutting edge 21 of the second tool leg 3 with the third connection region 24, and the second cutting zone Z2 occurs between the second cutting edge 13 of the first tool leg 2 and the radially outer part of the third cutting edge 21 of the second tool leg 3.

[0071] The cutting zone Z1 is particularly suitable for cutting cables 44 of different diameters. The relatively long handle portions 5 and 6 provide a favorable transmission and effect for the cutting blades. A favorable cutting effect on the cables 44 is achieved by the subdivision of the first cutting blade 12, in particular into two cutting regions 15 and 16 that transition into one another via the first connecting region 19, and also by the embodiment of the third connecting region 24, which is flanked on both sides by the cutting regions 22 and 23 of the third cutting blade 21. The pointed connection regions 19 and 24 that separate the concave cutting regions from one another essentially provide an initial pointed cutting load on the workpiece to be cut, possibly only sporadically, during the cutting operation, from which the cutting process is further continued on both sides, substantially in the circumferential direction of the workpiece to be cut, during further closing movements of the cutting tool. Furthermore, in the preferred embodiment, a preferred cutting sequence is obtained in which the opening area bounded on one side by the outer edge of the first cutting area 22 of the third cutting blade 21 eventually reaches a position where it overlaps the tip of the opposite cutting blade 12. Furthermore, as a result of this embodiment of the first cutting zone Z1, an effect can be achieved on the workpiece to be cut, for example the cable 44, that this workpiece tends to be loaded towards the axis of rotation in the cutting opening during the cutting process, preferably throughout the entire cutting process (at least from the above-mentioned initial closed position onwards), with the intended effect being an improved cutting pattern and also a favourable handling with reduced forces.

[0072] As mentioned above, the radially outer second cutting zone Z2 is preferably used to cut, for example, the cable sheath 25 (see Figures 11 and 12). To this end, the radially outer cutting regions of the second cutting blade 13 and the third cutting blade 21 are used, in particular the second cutting region 18 of the second cutting blade 13 and the concave portion 42 of the second cutting region 23 of the third cutting blade 21. The first cutting region 17 of the second cutting blade 13 can be used in combination with the straight portion 41 of the second cutting region 23 of the third cutting blade 21 to strip, for example, the wire 26, as shown in Figures 9 and 10.

[0073] When using the second cutting zone Z2, the shoulder 14 provides a radially inward stop to prevent the cable to be processed or the wire to be processed from penetrating into the radially inner region of the cutting zone Z1.

[0074] The geometry of the cutting blade described above allows the narrow leg width to allow processing of the workpiece in the region of the cutting zone Z2 forward relative to the handle parts 5 and 6, and in this respect provides ergonomic handling.

[0075] 31, further geometric relationships relating to shoulder 14 are described, which may also be important in their own right in combination with the above-described embodiments.

[0076] A fourth radius R4 originating from the axis of rotation x extends through shoulder 14 at the radially outer portion of the outer peripheral edge of shoulder 14 (which is also part of first outer peripheral edge 27 at intersection point s), which is selected to be located approximately in the middle of the height of shoulder 14. More preferably, the height of the shoulder 14 is defined by measurements M1 and M2 taken perpendicular to this radius R4 at the intersection point s. Measurements M1 and M2 are obtained from the distance M1 from the radius R4 in the closing direction S to a dimension point MP1 on the shoulder 14 that is furthest away, and measurement M2 taken perpendicularly in the opposite direction to a dimension point MP2 on the second cutting edge 13 that is the lowest point of the second cutting edge 13. These measurements M1 and M2 are equal with respect to the intersection point s.

[0077] The portion of the outer edge is substantially straight and corresponds to a tangent to the radius R4 at the intersection point s, which extends over a considerable dimension, ie at least half of the dimension corresponding to the height.

[0078] In this case, it is further preferred that the linear or substantially linear path of the outer edge extends, starting from intersection point s, over a larger measurement dimension in the direction of dimension point MP1 than in the opposite direction, i.e., the direction of dimension point MP2. The linear or substantially linear dimension of the portion of the outer edge in the direction of dimension point MP1 is also about 1.2 to 1.8 times, and preferably about 1.4 to 1.6 times, the dimension in the opposite direction.

[0079] The fourth radius R4 mentioned above can be the same as the first radius R1, but can also be different from it. Similarly, the height h mentioned above can be the same as the height mentioned here, but can also be different.

[0080] In particular, it is preferred that the first cutting blade has only one of the described connection regions, and / or that the second cutting blade has only one of the described connection regions, and / or that the third cutting blade has only one of the described connection regions.

[0081] The above-described embodiments are intended to generally describe the inventions covered by this application, and the following feature combinations are used to at least independently advance the prior art, and two or more or all of these feature combinations may also be combined.

[0082] 1. A manually operable cutting tool comprising: the first cutting blade 12 of the first tool leg 2 has two first and second cutting regions 15, 16 formed successively in the radial direction R, which transition into each other via a first pointed connecting region 19; the first pointed connection region 19 also forms part of the outer edge 27 of the opening region 35 in the initial closed position; and a first radius R1 originating from the axis of rotation x on the pivot plane E and abutting the first pointed connection area 19 from the outside when viewed in the direction opposite the closing direction S, and extending through the shoulder 14 at approximately half the height h measured along a perpendicular a to the second radius R2 passing through the pivot plane E, the second radius R2 contacting the second cutting edge 13 of the first tool leg 2 at its lowest point 37 when viewed in the direction opposite the pivot direction S, the perpendicular a passing through the area 34 of the shoulder 14 that protrudes furthest in the pivot direction S;

[0083] A manually operable cutting tool, wherein each of the first and second cutting blades (12, 13) of the first tool leg (2) has two first and second cutting regions (15, 16 and 17, 18) arranged successively in the radial direction (R) and transitioning into each other via first and second pointed connecting regions (19, 20), each of the pointed connection regions 19, 20 is formed as a convex transition dividing the first and second cutting regions 15, 16 and 17, 18; and A straight line G drawn from the outside on the pointed connecting region 19, 20 passes through the shoulder 14 formed between the first and second cutting edges 12, 13, The protruding dimension v of the shoulder 14 measured perpendicular to the line G is characterized by a depth measured in the opposite direction perpendicular to the line G, which corresponds to four or more times the maximum depth t of the area cut by the line G of the first cutting region 17 of the second cutting edge 13.

[0084] A manually operable cutting tool, wherein a first cutting blade 12 of a first tool leg 2 has two first and second cutting regions 15, 16 arranged successively in a radial direction R and transitioning into each other via a first pointed connecting region 19; the shoulder 14 formed only on the first tool leg 2 is, in its radially outer portion facing the second cutting edge 13 at the first outer edge 27, traversed by a fourth radius R4 starting from the axis of rotation x, the fourth radius R4 extending through the shoulder 14 at the intersection point s in a portion related to the intersection point s approximately in the middle of the height of the shoulder 14, the said portion extending, over approximately half of its length, along a tangent T to the fourth radius R4 at the intersection point s; The height of the shoulder 14 is obtained from a dimension M1 measured from the intersection point s perpendicular to the fourth radius R4 to a first dimension point MP1 on the shoulder 14 itself that is furthest from the fourth radius R4 in the closing direction, and a dimension M2 measured from the fourth radius R4 to a second dimension point MP2 on the second cutting edge 13 that is furthest in the opposite direction to the closing direction; and The outer edge of the portion is characterized by a transition from the intersection point to a convex curve to a first dimension point MP1 and a concave curve to a second dimension point MP2.

[0085] A manually operable cutting tool characterized in that the first cutting blade 12 is movable over its entire length b and the second cutting blade 13 is movable over substantially its entire length c relative to a third cutting blade 21 of the second tool leg 3, the third cutting blade 21 extending over the combined length d of the first and second cutting blades 12, 13.

[0086] A manually operable cutting tool is characterized in that a protruding shoulder (14) is formed on the first tool leg (2) only.

[0087] A manually operable cutting tool characterized in that a third pointed connection region 24 is formed in the first half of the length e of the third cutting edge 21 measured in perpendicular projection to the third radius R3 as viewed from the rotation axis x, and that the third pointed connection region 24 also forms part of the outer edge 29 of the opening region in the initial closed position.

[0088] A manually operable cutting tool characterized in that a third radius R3 extending from the rotation axis x on the pivot plane E abuts the third pointed connection region 24 from the outside when viewed in the direction opposite the closing direction S and extends beyond the third pointed connection region 24 without passing through the second tool leg 3.

[0089] A manually operable cutting tool is characterized in that the first pointed connection region (19) and the third pointed connection region (24) are spaced apart from each other in the radial direction (R).

[0090] A manually operable cutting tool is characterized in that the third pointed connection region (24) is formed closer to the axis of rotation (x) than the first pointed connection region (19).

[0091] A manually operable cutting tool, wherein the first and second cutting edges (12, 13) of the first tool leg (2) are formed as an outer edge (27) of a first contact support surface (28) of the first tool leg (2), and the third cutting edge (21) of the second tool leg (3) is formed as an outer edge (29) of a second contact support surface (30) of the second tool leg (3), and in the closed position the first contact support surface (28) is flush with or aligned with the second contact support surface (30); and Characterized in that the first and second contact bearing surfaces 28, 30 each extend on the same continuous plane.

[0092] A manually operable cutting tool characterized in that the first cutting area 15 of the first cutting blade 12 and the first cutting area 17 of the second cutting blade 13 extend along the same second radius R2 extending on the plane of rotation E relative to the axis of rotation x.

[0093] A manually operable cutting tool characterized in that the length b of the first cutting blade 12 measured on the second radius R2 to the most protruding point of the first cutting blade 12 in the closing direction corresponds to no more than twice the protruding dimension of this point perpendicular to the second radius R2.

[0094] A manually operable cutting tool characterized in that the first contact support surface 28 of the first tool leg 2 is formed continuously including the shoulder 14 and has cutting edges 31, 32 with cutting angles α, α'.

[0095] It is characterized in that the cutting angles α, α′ vary over the length b, c of the first and / or second cutting edge 12 , 13 of the first tool leg 2 .

[0096] All disclosed features are essential to the invention (both by themselves and in combination with one another). The disclosure of the application must fully include the disclosure of any relevant / attached priority documents (copies of the previous application), and for this purpose, the features of these documents must be included in the claims of the present application. Dependent claims characterize further embodiments of independent inventions of the prior art by their features, even in the absence of features of the reference claims, and are used, in particular, to file divisional applications based on these claims. The invention defined in each claim may further comprise one or more of the features defined in the preceding description, in particular as specified by the reference signs and / or list of reference signs. The present invention also relates to designs in which some of the features set out in the preceding description are not implemented, especially insofar as these features are clearly unnecessary for the respective purpose or can be replaced by other technically equivalent means. [Explanation of symbols]

[0097] 1 cutting tool 2 First Tool Leg 3 Second Tool Leg 4 Swivel bolt 5 Handle 6 Handle 7. Cutting Jaw 8 Cutting Jaw 9 Work Surface 10 Work Surface 11 Cutting port 12 Second cutting blade 13 Second cutting blade 14 Shoulder 15 First cutting area 16 Second cutting area 17 First cutting area 18 Second cutting area 19 First Connection Area 20 Second Connection Area 21 Third cutting blade 22 First cutting area 23 Second cutting area 24 Third Connection Area 25 Cable sheath 26 wires 27 First Outer Edge 28 first contact support surface 29 Second Outer Edge 30 second contact support surface 31 Cutting blade 32 Cutting blade 33 Closed area 34 areas 35 First opening area 36 Second opening area 37 points 38 Frank 39 Frank surface 40 points 41 parts 42 Concave part 43 lines 44 Cable a perpendicular line b Length c length d length e length f Radial dimension j radius dimension k height m height h height t depth v Projection dimension x axis of rotation E Rotation plane G straight line M1 measurement dimension M2 measurement dimensions MP1 dimension point MP2 dimension point R Radial direction R1 First radius R2 2nd radius R3 3rd radius R4 4th radius s intersection S Close direction Z1 First cutting zone Z2 Second cutting zone α cutting angle α' cutting angle β cutting angle

Claims

1. A manually operable cutting tool (1) having two tool legs (2, 3), a first tool leg (2) and a second tool leg (3), which are pivotable towards each other along a pivot plane (E) about an axis of rotation (x), The tool legs (2, 3) form handle portions (5, 6) on one side of the rotation axis (x) and a cutting opening (11) on the other side, Furthermore, the working surfaces (9, 10) of the cutting opening (11) are formed by cutting blades (12, 13, 21), and the working surface (9) of the first tool leg (2) has first and second cutting edges (12, 13), the first cutting edge (12) of the first tool leg (2) transitioning at the transition to the second cutting edge (13) into a shoulder (14) projecting in a closing direction (S) relative to the second cutting edge (13); During the movement of the cutting tool (1) to the closed position, the shoulder (14) is initially positioned to overlap the second tool leg (3) in a closing area (33) in an initial closed position, the cutting tool (1), wherein in the initial closed position, the closed region (33) is formed at a radial end of an open region (35) remaining between the first cutting blade (12) of the first tool leg (2) and the second tool leg (3) in the initial closed position, as viewed in a radial direction (R) from the rotation axis (x), the first cutting edge (12) of the first tool leg (2) has two first and second cutting regions (15, 16) formed successively in the radial direction (R) and transitioning into each other via a first pointed connecting region (19); said first pointed connecting region (19) also forms part of the outer edge (27) of said opening region (35) in said initial closed position; and a first radius (R1) extending from the axis of rotation (x) on the swivel plane (E) abuts the first pointed connection region (19) from the outside, when viewed in the direction opposite to the closing direction (S), and passes through the shoulder (14) at a height approximately half the height (h) measured on a perpendicular (a) to a second radius (R2) passing through the swivel plane (E), the second radius (R2) contacts the second cutting edge (13) of the first tool leg (2) at its lowest point (37), when viewed in the direction opposite to the swivel direction (S), and the perpendicular (a) passes through the region (34) of the shoulder (14) that protrudes furthest in the swivel direction (S).

2. A manually operable cutting tool (1) according to the preamble of claim 1 or according to claim 1, the first and second cutting edges (12, 13) of the first tool leg (2) each have two first and second cutting regions (15, 16 and 17, 18) arranged successively in the radial direction (R) and transitioning into each other via first and second pointed connecting regions (19, 20); each of said pointed connecting regions (19, 20) is formed as a convex transition dividing said first and second cutting regions (15, 16 and 17, 18), respectively, formed by a concave outer edge (27); and a straight line (G) abutting the outer side of the pointed connecting region (19, 20) passes through the shoulder (14) formed between the first cutting edge and the second cutting edge (12, 13); A cutting tool characterized in that the protruding dimension (v) of the shoulder portion (14) measured perpendicular to the straight line (G) corresponds to a depth measured in the opposite direction perpendicular to the straight line (G) that is four times or more the maximum depth (t) of the area cut by the straight line (G) of the first cutting area (17) of the second cutting edge (13).

3. A manually operable cutting tool (1) having two tool legs (2, 3), a first tool leg (2) and a second tool leg (3), which are pivotable towards each other along a pivot plane (E) about an axis of rotation (x), The two tool legs (2, 3) form handle portions (5, 6) on one side of the rotation axis (x) and a cutting opening (11) on the other side, Furthermore, the working surface (9, 10) of the cutting opening (11) is formed by cutting blades (12, 13, 21), and the working surface (9) of the first tool leg (2) has first and second cutting blades (12, 13); the first cutting edge (12) of the first tool leg (2) transitions at the transition to the second cutting edge (13) into a shoulder (14) projecting in a closing direction (S) relative to the second cutting edge (13); During the movement of the cutting tool (1) to the closed position, the shoulder (14) is initially positioned to overlap the second tool leg (3) in a closing area (33) in an initial closed position, and the cutting tool (1), wherein in the closed position, the closed region (33) is formed at a radial end of an open region (35) remaining between the first cutting edge (12) of the first tool leg (2) and the second tool leg (3) in the initial closed position, as viewed in a radial direction (R) from the rotation axis (x), the first cutting edge (12) of the first tool leg (2) has two first and second cutting regions (15, 16) arranged successively in the radial direction (R) and transitioning into each other via a first pointed connecting region (19); the shoulder (14) formed only on the first tool leg (2) is, in its radially outer portion facing the second cutting edge (13) at the first outer edge (27), traversed by a fourth radius (R4) originating from the axis of rotation (x), the fourth radius (R4) extending through the shoulder (14) at an intersection point (s) approximately in the middle of the height of the shoulder (14) in a portion related to said intersection point (s), the portion extending for more than half of its length along a tangent (T) to the fourth radius (R4) at said intersection point (s); The height is obtained from the dimensions (M1, M2) measured perpendicularly from the intersection point (s) to the fourth radius (R4) from the fourth radius (R4) to a first dimension point (MP1) on the shoulder (14) itself that is furthest in the closing direction, and from the fourth radius (R4) to a second dimension point (MP2) on the second cutting edge (13) that is furthest in the opposite direction to the closing direction, respectively; and A cutting tool characterized in that the outer edge of the portion, when viewed from the intersection point (s), transitions into a convex curve to the first dimension point (MP1) and a concave curve to the second dimension point (MP2).

4. A cutting tool according to any of the preceding claims, A cutting tool characterized in that the first cutting blade (12) is movable over its entire length (b) and the second cutting blade (13) is movable over substantially its entire length (c) with respect to a third cutting blade (21) of the second tool leg (3), the third cutting blade (21) extending over the combined length (d) of the first and second cutting blades (12, 13).

5. A cutting tool according to claim 1, 2 or 4, the fourth claim not citing the third claim, A cutting tool characterized in that said protruding shoulder (14) is formed only on said first tool leg (2).

6. A cutting tool according to any of the preceding claims, a third pointed connection region (24) is formed in the first half of the length (e) of the third cutting edge (21), measured in a perpendicular projection relative to the third radius (R3) as viewed from the axis of rotation (x), and the third pointed connection region (24) also forms part of the outer edge (29) of the opening region in the initial closed position.

7. 7. A cutting tool according to claim 6, 1. A cutting tool, characterized in that the third radius (R3) starting from the rotation axis (x) on the pivot plane (E) first abuts the third pointed connection area (24) from the outside, when viewed in the direction opposite to the closing direction, and then extends beyond the third pointed connection area (24) without passing through the second tool leg (3).

8. A cutting tool according to any of the preceding claims, A cutting tool characterized in that the first pointed connecting region (19) and the third pointed connecting region (24) are spaced apart from each other in the radial direction (R).

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

10. A cutting tool according to any of the preceding claims, the first and second cutting edges (12, 13) of the first tool leg (2) are formed as outer edges (27) of a first contact support surface (28) of the first tool leg (2); the third cutting edge (21) of the second tool leg (3) is formed as an outer edge (29) of a second contact support surface (30) of the second tool leg (3); the first contact support surface (28) is in a partially offset state with the second contact support surface (30) in the closed position or is aligned with and partially overlaps the second contact support surface (30); and A cutting tool characterized in that the first and second contact bearing surfaces (28, 30) extend on or along the same continuous plane.

11. A cutting tool according to any of the preceding claims, wherein 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 the same second radius (R2) extending on the plane of revolution (E) relative to the axis of rotation (x).

12. A cutting tool according to any of the preceding claims, A cutting tool characterized in that the length (b) of the first cutting edge (12) measured on the second radius (R2) to the most protruding point of the first cutting edge (12) in the closing direction corresponds to no more than twice the protruding dimension of that point perpendicular to the second radius (R2).

13. A cutting tool according to any of the preceding claims, The cutting tool is characterized in that the first contact support surface (28) of the first tool leg (2) is formed continuously including the shoulder portion (14) and has cutting edges (31, 32) with cutting angles (α, α').

14. 14. A cutting tool according to claim 13, 1. A cutting tool, characterized in that the cutting angles (α, α') vary over the length (b, c) of the first and / or second cutting edges (12, 13) of the first tool leg (2).

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