Handheld device comprising a blade

Abstract

The invention relates to a handheld device (1) comprising a blade (17), wherein the handheld device (1) has a handle part (5) comprising a longitudinal extent (L), a first end (60) and a second end (10), and also has a blade part (6) comprising the blade (17), wherein the blade part (6), assigned to the second end (10), is mounted on the handle part (5) such that it can be pivoted about a first pivot axis (x) in a pivoting plane (E) running in the direction of the longitudinal extent (L), so that the blade can be moved in a first pivoting direction (r) out of a pivoted-in position (G), in which the second end (10) delimits the handheld device (1) along the longitudinal extent (L), into a first operating position (A1), in which the blade projects out beyond the second end along the longitudinal extent (L), wherein the blade part (6) can be moved back into the pivoted-in position (G) in a second pivoting direction (r') and, at the second end (10), the handle part (5) has an engagement structure (13), for rolling support on an item (2) which is to be cut. In order for such a handheld device to be configured advantageously, it is proposed that the blade (17) can be latched in the first operating position (A1), which corresponds to a first pivoting angle (α), and that, once the latching has been disabled, free pivotability between the blade part (6) and the handle part (5) is made possible in a pivoting-angle range (δ), which exceeds the first pivoting angle (α), so that use can be made of the engagement structure (13).

Description

Description Handheld device with a knife field of technology

[0001] The invention relates to a hand-held device with a knife, wherein the hand-held device has a handle part with a longitudinal extension, a first end and a second end and further has a knife part with the knife, wherein the knife part is held on the handle part in association with the second end in a pivot plane running in the direction of the longitudinal extension about a first pivot axis, for moving the knife in a first pivot direction from a pivoted-in position, in which the second end limits the hand-held device in the longitudinal extension, into a first working position, in which the knife projects beyond the second end in the longitudinal extension, wherein the knife part can be moved back into the pivoted-in position in a second pivot direction and the handle part has an engagement structure on the second end for rolling support on an object to be cut.

[0002] The invention also relates to a hand-held device with a knife, wherein the hand-held device has a handle part and a knife part with the knife, wherein the knife part has a longitudinal extension and is fastened to the handle part at a first end, wherein a further, second free end of the knife part, which is remote from the first end in a direction of the longitudinal extension, has a front edge, wherein the knife further has a cutting edge, wherein both the front edge and the cutting edge open into a sliding shoe which projects over a section of the cutting edge running in the longitudinal extension of the knife part.

[0003] Furthermore, the invention relates to a hand-held device with a knife, wherein the hand-held device has a handle part and a knife part with the knife, wherein furthermore, the knife part has a longitudinal extension and is fastened to the handle part at a first end, wherein a further second free end of the knife part, which is remote from the first end in a direction of the longitudinal extension, has a front edge, wherein in addition the knife has a cutting edge and the knife part has a knife protection part which covers a back edge of the knife facing away from the cutting edge. State of the art

[0004] Handheld devices of the type in question are known in various designs. These are used, for example, as so-called cable cutters for removing the sheath from electrical cables. Furthermore, such handheld devices can also be used for other cutting tasks. Reference is made, for example, to EP 0 610 841 B1.

[0005] Furthermore, a handheld device in the form of a cable cutter is known, for example, from DE 102004 005 646 B4. This device has a pivoting blade guard that, when the handheld device is not in use, completely covers the blade in the area of ​​the back edge, the front edge, and the two broad surfaces of the blade connecting the back edge to the cutting edge, and extends freely beyond the cutting edge. To use the handheld device, the blade guard must be pivoted into a position exposing the cutting edge. In this exposed position, the blade guard, while spaced apart from the back edge, also exposes the front edge and parts of the broad surfaces of the blade. Summary of the invention

[0006] In view of the state of the art described above, the task arises of further advantageously designing a hand-held device of the type in question with regard to convenient handling.

[0007] A possible solution to the problem is provided according to a first inventive idea in a hand-held device in which the knife can be locked in the first working position, which corresponds to a first pivoting angle, and that after the locking is released in a pivoting angle range exceeding the first pivoting angle, a free pivotability between the knife part and the handle part is possible for use of the engagement structure.

[0008] The blade part can be pivoted into a position, starting from the pivoted-in position, which can also be a protected non-use position for the blade, in the direction of the first pivoting direction beyond the first working position. Preferably, the blade part is not locked in this second working position and can be freely pivoted about the pivot axis between the first working position and a pivoting end position, preferably limited by a stop. This can result in a free pivoting angle range of, for example, approximately 60 to 120°, or further, for example, approximately 80 to 100°.

[0009] Further preferably, during a usual cutting process using the engagement structure on the handle part and the toggle-like action on the knife part, in particular on the knife, the first, locked working position is not reached in the course of the free pivotability of the knife part.

[0010] When using the handheld device, the engagement structure formed on the handle interacts with the object to be cut, in particular with the facing surface of the object, particularly when using the handheld device with rolling support on the object as a temporary abutment. The knife applied to an object to be cut, for example, the sheath of an electrical cable, can thus by utilizing the engagement structure on the handle part, in particular in the direction of a longitudinal extension of the object to be cut, but alternatively also, for example, in the case of a circumferential cut, in particular in the case of objects with a large diameter, as a result of alternating pivoting displacement of the knife part in the first or second pivoting direction relative to the handle part within the resulting pivoting angle range. In this way, the hand-held device is used to advantageously result in a toggle-like interaction between the handle part and the knife part, which proves to be advantageous in terms of handling, in particular, but not exclusively, when the knife is pulled through the object to be cut. In this way, energy-saving transmission is achieved during the cutting process. The knife edge is pulled, for example, like a plow through the object to be cut.

[0011] Furthermore, in the first working position of the blade portion, a conventional cut can also be made using the proposed handheld device. In this first working position, the handheld device can be used like a conventional knife with a rigid blade portion that extends essentially longitudinally beyond the second end of the handle portion.

[0012] As a result, the handset can be used in at least two independent working positions.

[0013] A possible solution to the problem can also be achieved in that the cutting edge has a cutting projection which otherwise protrudes relative to the section of the cutting edge running in the longitudinal extension of the knife part and in that the cutting projection is formed on the end of the knife facing the handle part.

[0014] By using such a cutting projection, for example, a circumferential cut can be carried out on the object to be cut, for example a cable sheath, in a manner which is advantageous in terms of handling, wherein the exposed cutting projection further advantageously supports the positioning and initial penetration into the material to be cut.

[0015] Furthermore, by means of such a cutting projection, a (first) cut can advantageously be made in the longitudinal direction of, for example, a cable sheath, at a distance from a free cable end. The sliding block can then be guided through the slot-like incision thus created in the cable sheath, if necessary with additional cutting by a cutting edge adjoining the sliding block, and the incision can then be extended in the longitudinal direction of the cable as required. The further longitudinal cut made in this way can, if necessary, be achieved either by pulling or pushing the hand tool. Thus, after two further cuts have been made in the circumferential direction bordering the longitudinal cut on both sides, a section of the cable sheath spaced apart from the free cable end can be removed.

[0016] With regard to the longitudinal extension of the knife part, this cutting projection is located much closer to the handle part than to the sliding shoe.

[0017] When a pivotable knife part is formed, the cutting projection is formed at the end of the knife or knife part assigned to the pivot axis.

[0018] Another possible solution to the problem is provided by a further inventive idea in a hand-held device, in which the cutting edge is exposed when the blade protection part is supported on the back edge of the knife and the blade protection part is positioned next to the back edge. edge also covers part of the front edge as well as a transition of the front edge into the back edge.

[0019] The knife guard is designed in such a way that, in terms of handling, it can be used to rest a user's finger on the back edge of the knife, preferably constantly in contact with the back edge of the knife, in order to exert pressure on the knife during the cutting process. The knife guard is designed so that the cutting edge is preferably completely exposed and a partial section of the front edge, starting from the cutting edge, is exposed for use. To prevent injury in the event of a finger slipping while it is in contact with the knife guard, the knife guard covers not only the back edge that offers support for the finger via the knife guard, but also the transition to the front edge and a partial section of the front edge adjoining the transition. The relevant sections of the knife remain protected even in the use position.

[0020] With regard to the cutting edge, it is intended that this should preferably be completely exposed. The front edge, however, can be covered, starting from the back edge, for example, over 1 / 4 to 1 / 2, or further, for example, over 1 / 3 of its length.

[0021] The features of the above-described independent claims are significant both individually and in any combination with one another, whereby further features of an independent claim can be combined with the features of another independent claim or with features of several independent claims, and further also with only individual features of one or more of the other independent claims.

[0022] Thus, according to one possible embodiment, a handheld device can be provided in which the knife can be locked in the first working position, which corresponds to a first pivoting angle, and after the locking is released, free pivoting between the knife part and the handle part is possible in a pivoting angle range exceeding the first pivoting angle in order to use the engagement structure, wherein, when a provided knife protection part is supported on the back edge of the knife, the cutting edge is exposed and the knife protection part covers not only the back edge but also part of the front edge and a transition of the front edge into the back edge and / or wherein the cutting edge has a cutting projection which otherwise protrudes relative to the section of the cutting edge running in the longitudinal extent of the knife part, and the cutting projection is formed on the end of the knife facing the handle part.

[0023] Further features are explained below, including in the description of the figures, often in their preferred relationship to the solutions described in principle or to other features. However, they may also be important in their relationship to only individual features already described or to the respective further described feature, or each may be important independently.

[0024] The engagement structure provided at the end of the handle part can be formed by a profiling of the corresponding handle part section. For example, the engagement structure can be a rib structure, which, in a section through the handle part in a plane aligned parallel to the pivoting plane of the blade part, can be represented, for example, as a curved toothed strip. This preferably results in a rolling direction of the blade part with a corresponding geometric rolling axis that runs perpendicular to the pivoting plane of the blade part.

[0025] According to a preferred embodiment, in the first working position, the engagement structure can extend beyond the blade when viewed in the first pivoting direction. Accordingly, in the first working position, the engagement structure can be exposed in the region of the second end of the handle part, adjacent to the blade part with respect to the first pivoting direction.

[0026] In a further embodiment, the blade part can be pivoted into a third working position corresponding to a third pivot angle, wherein the blade part can also be locked in this third working position. This third working position can, as is also preferred, be provided in the direction of the first pivot direction between the pivoted-in position and the first working position. Furthermore, however, it is also possible, for example, to form the third or further locked working position in the direction of the first pivot direction between the first working position and a stop-limited pivot end position of the blade part finally resulting further in the first pivot direction.

[0027] According to a preferred embodiment, the third pivot angle can correspond to 1 / 10 to 9 / 10 of the first pivot angle. A possible first pivot angle for pivoting the blade part from the pivoted-in position into the working position can be, for example, 90 to 180° or more up to, for example, 210° or more, further, for example, approximately 120 to 150°. Starting from the pivoted-in position, a third pivot angle of the blade part into the third working position can accordingly result from, for example, approximately 75 to 120°, further, for example, approximately 80 to 100°.

[0028] Preferably, the pivoted-in position of the blade part can also be locked. Thus, according to a preferred embodiment, a total of three lockable pivot positions of the blade part can be achieved: firstly, the pivoted-in non-use position of the blade part, and secondly, the first Working position and, in addition, preferably the third working position, which is established in the first pivoting direction between the pivoted-in position and the first working position. The respective locking position is preferably automatically engaged upon reaching the respective pivoting position of the blade part and, more preferably, can only be canceled again at the user's discretion through targeted intervention.

[0029] The third working position can be a safety position, which, for example, prevents the knife part from swinging back completely into the retracted position if the knife part is not properly locked in the first working position. In such a case, the knife part locks into the third working position, from which further pivoting of the knife part is only possible with deliberate effort and by releasing the locking mechanism. This eliminates the risk of injury to one or more fingers grasping the handle if the knife part swings back into the retracted position in an uncontrolled manner.

[0030] The locking mechanism can, as further preferred, be provided between a handle end of the knife part associated with the handle part and a locking part provided in the handle part. The locking part is further preferably ergonomically positioned for actuation by a finger, for example, the thumb, of the user's hand otherwise holding the handheld device. The locking part is further preferably displaceable between a locking position securing the working position of the knife part and a pivoting release position for the knife part.

[0031] For example, the locking part can be movable perpendicular to the pivoting plane. This preferably results in a displacement direction of the locking part in a preferred parallel alignment with the knife part pivot axis.

[0032] The locking part can also be subjected to the action of a spring acting on the locking part, particularly in the direction of the locking position. For example, a compression spring, furthermore, a cylindrical compression spring, can be provided for this purpose, which rests on the handle part at one end and acts on the locking part at the other end. The deliberate linear displacement of the locking part from the locking position to a release position is achieved, for example, by exerting pressure via a finger.

[0033] To prevent accidental actuation of the locking part toward the pivoting release position of the blade part, a further development of the invention provides that the locking part can be locked in a locked position by a first blocking part. To release the locking position of the blade part, the first blocking part must first be deliberately displaced by the user. This then releases the locking part in the locked position. Accordingly, (at least) two consecutive actions are required to release the knife part's locked position.

[0034] The first blocking part can be spring-loaded toward the blocking position. For this purpose, a compression spring, for example, or a cylindrical compression spring, can be provided, which rests on the handle at one end and acts against the first blocking part at the other end.

[0035] It can also be provided that the first blocking part is also initially displaced into this position to assume the locking position between the knife part and the locking part on the handle part, after which, after assuming the locking position, this locking position is blocked by the return displacement of the first blocking part. In this context, however, a design is also possible in which, during a pivoting displacement of the knife part in the found locking position, the locking part, as described above, is spring-loaded. supports itself in the direction of the locking position and in doing so presses the first blocking part, for example via a control bevel, into the blocking release position against the spring acting on the first blocking part, wherein upon reaching the end position of displacement of the locking part in the locking position, the first blocking part automatically resumes the blocking position due to the spring loading.

[0036] According to a preferred embodiment, the first blocking part can be a sliding part that is movable, more preferably linearly movable, in a plane parallel to the pivoting plane between a release position and a blocking position. Such a sliding part is also preferably arranged ergonomically on the handle part, so that the user can operate both the first blocking part and the locking part one after the other, for example, with the thumb of the hand otherwise holding the handset.

[0037] According to a further possible embodiment, the sliding part or the first blocking part can be secured in its blocking position by a second blocking part. The first blocking part can also, for example, represent a transport or storage lock.

[0038] The second blocking part can be a flap part movable about a second pivot axis. This flap part is also preferably ergonomically favorable and can be reached, for example, by a finger, in particular the thumb, of the user's hand otherwise holding the handheld device. The pivot plane of the flap part can extend substantially perpendicular to the pivot plane of the blade part or perpendicular to the displacement plane of the first blocking part. In a further embodiment, the pivot axis of the flap part can be substantially aligned with the sliding displacement direction of the first blocking part.

[0039] Preferably, the handle end of the knife part is also received in the handle part. Furthermore, this reception of the handle end in the handle part occurs in every possible pivoting position of the knife part.

[0040] As further preferred, the knife can have a cutting edge and a back edge. The back edge can, as also preferred, not be designed to cut objects. Thus, more preferably, the back edge is blunt, similar to a conventional knife back.

[0041] The cutting edge can, as is otherwise preferred, be designed and constructed for pulling cutting, for example, of a cable sheath along its longitudinal direction. Furthermore, the knife can also have a second free end, remote from the end of the handle part in a direction of longitudinal extension, with a front edge. In a further embodiment, this front edge can, as is also preferred, be designed as a front cutting edge, by means of which, under pressure, the knife can be moved opposite to the direction of displacement during pulling cutting. Accordingly, the knife is designed for both pulling cutting—with reference to a longitudinal extension of the handle part—and pushing cutting.

[0042] According to one possible embodiment, the cutting projection can project beyond the section of the cutting edge immediately adjacent in the longitudinal direction by a distance which can be 1.5 mm or more, for example up to 3 mm or, further, for example, up to 5 mm. The section of the cutting edge immediately adjacent to the cutting projection in the direction of the first end can, as is also preferred, extend essentially in a straight line, optionally over a length which can correspond to approximately 0.5 to 0.8 times the total length of this cutting edge. A section immediately adjacent to the straight line The subsequent section can continue, for example, in a curved manner, up to the sliding shoe that may be provided.

[0043] In a view in which the cutting edge appears as a line, the cutting projection can, for example, be tapered in a gable-roof manner, with the projection edges running into the tip preferably being designed as cutting edges. The tip allows for effective penetration into the object to be cut, for example, the cable sheath. Furthermore, the cutting process is facilitated by the two-sided cutting edges, which, thanks to the design, can be performed both by pulling and pushing, as viewed from the handle or in the circumferential direction.

[0044] If the knife part is pivotable, the cutting projection can protrude beyond the cutting edge when viewed in the second pivoting direction. The cutting projection can be provided by a sharp-edged formation at the transition from the cutting edge to a terminal edge of the knife facing the handle. This sharp-edged transition area can also be rounded or by a spike in the form of a sharp-edged projection that protrudes beyond the cutting edge.

[0045] The above-described cutting projection can extend together with the end edge of the knife facing the handle, preferably at a distance from the handle in the direction of the knife's longitudinal extension. This alone can expose or free the relevant transition area of ​​the cutting edge.

[0046] In the pivoted-in position, a portion of the knife comprising the cutting edge with the cutting projection can be accommodated in a receiving recess of the handle. In this regard, it is further preferred that the cutting edge with the cutting projection, as well as essentially the cutting-edge front edge, be completely accommodated in the receiving recess. The receiving recess can be designed in a slot-like manner, essentially adapted to the geometry of the knife.

[0047] In a further embodiment, the knife can have a guide shoe. The guide shoe, which is preferably arranged in a beak-shaped transition area between the cutting edge and the front edge, serves primarily to prevent damage to the wires enclosed by the cable sheath, which is to be cut open, particularly in the longitudinal direction, during the stripping of an electrical cable. In a further preferred embodiment, this cutting area with the guide shoe is also completely accommodated in the receiving recess of the handle in the pivoted-in position.

[0048] In a further embodiment, the blade guard associated with the back edge of the blade can remain outside the receiving recess in the retracted position. The back edge of the blade is covered by the blade guard, at least over the entire length of the blade guard, even in the retracted position.

[0049] The knife protection part can be a plastic part attached to the knife, for example a snap-in plastic part, or further, for example, a plastic injection-molded part.

[0050] In addition, the blade protection part can also be used in a possible further, non-locked working position of the blade to apply pressure, for example when carrying out a circumferential cut, whereby the object to be cut over the circumference is further, for example, between see the knife part, in particular the cutting edge, and the part of the handle part having the receiving formation.

[0051] For this purpose, according to one possible embodiment, the knife guard can have a recess further along its longitudinal extension to accommodate a user's supporting finger. Such a recess, for example a trough-like recess, can also have a profiled surface to increase finger slip resistance. The user can use the recess to exert pressure on the knife, particularly on the cutting edge, with their finger.

[0052] Part of the back edge can be exposed between the handle part and the blade guard part. This section of the back edge not covered by the blade guard part and facing the handle part can, according to one possible embodiment, arise both, for example, in any working position of the blade part and also, for example, in the pivoted-in position of the blade part. In this case, for example, with reference to the first working position of the blade part, the uncovered area of ​​the back edge can, in a plan view of the handheld device, in which plan view the pivot plane of the blade part is represented as a line, extend over a free length outside the handle part, viewed in the longitudinal extent of the handle part, which can correspond to approximately one-third to one-sixth, furthermore, for example, approximately one-quarter to one-fifth of the total length of the knife part outside the handle part.

[0053] According to a further possible embodiment, the front edge, which is preferably designed as a cutting edge, can have an exposed region extending beyond the blade guard, which can have a length that is less than 10 mm, for example, approximately 4 mm up to approximately 6 mm. This free length of the area of ​​the front edge usable for cutting can be adapted to approximately the thickness of a cable sheath.

[0054] The ranges or value ranges or multiple ranges specified above and below also include all intermediate values ​​with regard to the disclosure, in particular in 1 / 10 increments of the respective dimension, and may therefore also be dimensionless. For example, the specification 1 / 10 to 9 / 10 or 0.1 to 0.9 times also includes the disclosure of 0.2 to 0.9 times, 0.1 to 0.8 times, 0.2 to 0.8 times, etc., while the disclosure of 120° to 150° also includes the disclosure of 120.1° to 150°, 120° to 149.9°, 120.1° to 149.9°, etc. This disclosure can serve, on the one hand, to delimit a stated range limit from below and / or above, but alternatively or additionally, also to disclose one or more singular values ​​from a respectively specified range. Short description of the drawings

[0055] The invention is explained below with reference to the accompanying drawings, which, however, only represent exemplary embodiments. A part that is explained only with reference to one of the exemplary embodiments and is not replaced by another part in another embodiment due to the special feature highlighted therein is thus also described for this further embodiment as a possible part present at any rate. The drawing shows: Fig. 1 shows a perspective view of a hand-held device, relating to a first embodiment in a first working position of a knife part; Fig. 2 shows the handset of the first embodiment in a perspective exploded view; Fig. 3 the bottom view of the hand-held device according to arrow III in Figure 1, concerning a pivoted-in position of the knife part; Fig. 4 is a plan view of the hand-held device according to arrow IV in Figure 1, concerning the position of the knife part according to Figure 3; Fig. 5 the front view according to arrow V in Figure 4; Fig. 6 the side view against the handset according to arrow VI in Figure 4; Fig. 7 shows the section through the section plane VII in Figure 1, relating to the first working position of the knife part, with further knife part positions shown in dash-dotted lines; Fig. 7a the enlargement of the Vila area in Figure 7; Fig. 7b the knife part in a sectioned individual view according to Figure 7; Fig. 8 shows the enlargement of area VIII in Figure 7; Fig. 9 is an enlarged view according to Fig. 8, but concerning the pivoted-in position of the knife part; Fig. 10 the hand-held device in a side view according to Figure 6, but concerning the first working position according to Figure 1; Fig. 11 shows the top view of the handset according to arrow XI in Figure 10; Fig. 12 the front view towards the handset according to arrow XII in Figure 10; Fig. 13 the enlargement of area XIII in Figure 10; Fig. 14 essentially shows the area of ​​the handset and knife part shown in Figure 13 in a perspective view; Fig. 15 the hand-held device with the knife part in the first working position during use of the hand-held device for cutting an object; Fig. 16 shows the enlarged view of area XVI in Figure 15; Fig. 17 the hand-held device in side view with the knife part in the first working position, when using a cutting projection for cutting the object in the circumferential direction; Fig. 18 shows the enlargement of area XVIII in Figure 17; Fig. 19 is a follow-up view to Fig. 18, relating to a situation in the course of a first cutting of the object by the cutting projection of the knife part; Fig. 20 is a view corresponding to Fig. 18, relating to a second embodiment of the cutting projection; Fig. 21 is a further illustration corresponding to Fig. 18, relating to the cutting projection in a third embodiment; Fig. 22 the hand-held device in a side view according to Figure 6, but concerning a third working position of the knife part; Fig. 23 is an enlarged sectional view according to Figure 8, concerning the working position of the knife part according to Figure 22; Fig. 24 is a further enlarged sectional view corresponding to Fig. 8, relating to an intermediate position between the third working position and the pivoted-in position of the knife part; Fig. 25 is a further side view corresponding to Fig. 6, taken towards the hand-held device, showing the knife part in a second working position; Fig. 26 is an enlarged sectional view corresponding to Fig. 8, relating to the working position of the knife part according to Fig. 25; Fig. 27 the hand-held device with the knife part in the second working position, relating to the use of the hand-held device in the course of making a longitudinal cut through an object; Fig. 28 is a subsequent illustration to Fig. 27 with a rolling pivoting displacement of a handle part of the hand-held device relative to the knife part; Fig. 29 is a perspective, partially sectioned, partially exploded view of the hand-held device, concerning a locking mechanism between the handle part and the knife part; Fig. 30 the interaction area of ​​the knife part and the handle part in a perspective, partially sectioned view, relating to a blocked locking position of the knife part; Fig. 31 shows the section along the section plane XXXI in Figure 30; Fig. 32 shows the section along the section plane XXXII in Figure 30; Fig. 33 is a view corresponding to Figure 30, showing the position after the locking between the knife part and the handle part has been released; Fig. 34 shows the section along the section plane XXXIV in Figure 33; Fig. 35 shows the section along the section plane XXXV in Figure 33; Fig. 36 the enlargement of area XXXVI in Figure 13; Fig. 37 the handset in a side view according to Figure 10, but relating to a further embodiment; Fig. 38 another embodiment of the handset in side view. Description of the embodiments

[0056] Shown and described, initially with reference to Figures 1 and 2, is a hand-held device 1 for cutting objects 2, in particular in the form of electrical cables, in which, using the hand-held device 1, an insulating sheath 4 surrounding wires 3 in a protective manner can be cut in order to remove the same.

[0057] The handheld device 1 of the embodiments shown in Figures 1 to 36 essentially consists of a handle part 5 and a blade part 6 pivotably mounted on the handle part 5. The corresponding geometric pivot axis x extends transversely to a longitudinal extension L of the handle part 5.

[0058] Figures 37 and 38 show embodiments in which the knife part 6 is rigidly, and accordingly not pivotably, held on the handle part 5.

[0059] In a preferred embodiment, the handle part 5 is composed of two handle shells 8 and 9 which can be connected to one another via screws 7, wherein a contact plane of the two handle shells 8 and 9 can, as is also preferred, coincide with a pivoting plane E of the knife part 6 (see, for example, Figure 4).

[0060] The handle part 5 has a free first end 60 facing away from the knife part 6 and a second end 10 facing the knife part 6. In this end section of the handle part 5 forming the end 10, an insert part 11 is received in the respective handle shell 8, 9 and is fastened to the associated handle shell via screws 12.

[0061] The respective insert part 11 projects in the longitudinal extension L of the handle part 5 in the area of ​​the end 10 beyond the contour of the handle part 5 or the handle shells 8 and 9 and forms an engagement structure 13 in this projecting area.

[0062] The engagement structure 13 can be formed by a rib structure 14 formed along a curved line in a side view, for example, according to Figure 6, via which in a predetermined working Position of the knife part 6 a rolling support of the handle part 5, for example on the object 2, can be achieved.

[0063] By forming the engagement structure 13 on an insert 11, the advantageous possibility arises of offering the engagement structure 13 and the handle part 5 in different materials. For example, the handle shells 8 and 9 can be made of a hard plastic material, while the inserts 11 with the engagement structures 13 can be formed, for example, as stamped sheet steel parts.

[0064] Preferably, the knife part 6 is pivotally mounted between the insert parts 11, for which purpose a pivot pin 15 receiving the geometric pivot axis x passes through the knife part 6 in the region of a bore 16 and the insert parts 11 in the region of further bores 52 (see Figure 2).

[0065] The knife part 6 initially and essentially has a knife 17 with a longitudinal extension M. A cutting edge 18 extends essentially in this longitudinal extension M and, opposite this, a back edge 19. The cutting edge 18 and back edge 19 are connected to one another via a front edge 20 in an end region of the knife 17 facing away from the handle part 5 or the bore 16 of the knife part 6.

[0066] A bearing eye 21 can be formed on the blade 17, substantially opposite the front edge 20 and simultaneously having the bore 16. While the back edge 19 essentially runs into the edge contour of the bearing eye 21, an edge 22 extending substantially transversely to the longitudinal extent L of the blade 10 results at the end of the cutting edge 18, correspondingly facing away from the front edge 20.

[0067] With reference to a section through the knife 17 in the region of the pivoting plane E, for example as shown in Figures 7, 7a or 7b, a convex profile as viewed from the cutting edge 18 results with respect to the back edge 19, wherein more preferably the back edge 19 is not designed for cutting, and more preferably is designed to be flat as viewed perpendicular to the pivoting plane E.

[0068] The cutting edge 18, which runs essentially straight over a partial section, as well as the front edge 20, which is designed as a further essentially straight cutting edge 18', are sharp-edged and blade-like, wherein in the transition from the front edge 20 to the cutting edge 18, a hook-shaped or beak-shaped cutting extension 23 is produced which is exposed relative to the course of the cutting edge 18 and which preferably carries a sliding shoe 24 at the end.

[0069] The sliding shoe 24 is essentially designed like a plate, overlapping the facing end sections of the sharp-edged front edge 20 and the cutting edge 18.

[0070] With reference to a side view, for example according to Figure 13 or Figure 37, there results a greatest distance k, viewed perpendicular to the rectilinear section of the cutting edge 18, between this rectilinear cutting edge section and the sliding shoe 24, which can correspond to approximately 0.4 to 0.7 times the length m of the rectilinear cutting edge section.

[0071] Associated with the back edge 19 and supported thereon is a further preferred component of the knife part 6 a knife protection part 25. This can, as is also preferred, be a cap-like hard plastic part, which surrounds the back edge 19 at least in a direction adjacent to the front edge 20. or a transition 26 of the front edge 20 into the back edge 19 and further preferably rests on both sides on the knife wide surfaces 27 while keeping the cutting edge 18 free (compare for example Figure 13 or Figure 38).

[0072] In addition, the knife protection part 25 also covers the aforementioned transition 26 and an adjoining section of the front edge 20.

[0073] With a length a of the front edge 20 viewed with reference to a cut, for example, according to Figures 7a or 7b through the knife 17 in the pivoting plane E, starting from the transition 26 of the front edge 20 into the back edge 19, the front edge 20 can be covered by a partial section of the knife guard 25 over a length b that can correspond to approximately 1 / 3 to approximately half of the front edge length a. This results in a length g over which the front edge 20 or the corresponding cutting edge 18' is exposed between the knife guard 25 and the sliding block 24 for carrying out a cutting operation in the sliding direction. This length g is preferably adapted to the sheath thickness of a cable, for example 3 to 5 mm, possibly up to 6 mm.

[0074] In particular, with reference to a first working position of the knife part 6 described in more detail below, for example as shown in Figure 7, or with reference to a hand-held device 1 with a rigid knife part 6 according to Figure 38, starting from the transition 26, there is a length c of the back edge 19 covered by the knife protection part 25, which corresponds to more than half, further for example approximately 2 / 3 to 4 / 5 of the length d of the back edge 19 projecting freely beyond the engagement structure 13. Thus, there is a corresponding further distance between the knife protection part 25 and the optionally provided engagement structure 13, at least in the case of a pivotable knife part 6 in the first working position, a section 28 of the back edge 19 not covered by the knife guard part 25.

[0075] At the end 29 of the knife part 6 facing the handle part 5, particularly in the transition area from the cutting edge 18 to the back edge 19, a sharp-edged cutting projection 30 is formed. This can be designed, as shown, for example, in Figures 17 to 19 and 36, in the form of a spike-like projection 31 projecting beyond the cutting edge 18, with gable-roof-like cutting edges 18".

[0076] The cutting edges 18" of the cutting projection 30 can, with reference to a side view, for example according to Figure 36, enclose an angle E of approximately 80 to 100°, furthermore, for example, approximately 90°, with respect to one another, wherein, furthermore, a relevant angle bisector p, according to one possible embodiment, runs substantially perpendicular to the rectilinear section of the cutting edge 18 or to an extension of this cutting edge section (see Figure 36).

[0077] This results in a projection dimension h of the tip 61 of the cutting projection 30 relative to the rectilinear section of the cutting edge 18, which is preferably greater than 1.5 mm, for example 2 mm or more, up to 5 mm, for example.

[0078] The cutting projection 30 can also be formed, as shown in Figure 21, by a sharp-edged transition, for example, extending at a right angle, from the cutting edge 18 to the peripheral edge 22. Alternatively, as shown in Figure 20, this transition forming the cutting projection 30 can also be formed by a rounded cutting edge.

[0079] Regardless of the respective possible configuration, a released cutting projection 30 is produced, by means of which, for example, a circumferential cut can be made in an insulating jacket 4 in an advantageous manner, wherein, when the knife part 6 is aligned in the first working position, an object to be cut into is supported on a contact surface 53 of the handle part 5, which contact surface runs at a distance from the cutting projection 30 of the knife 17. As a result of the pivoting displacement of the hand-held device 1 overall in the circumferential direction u of the object 2, as shown by way of example in Figure 19, the knife 17 is initially digged into the object 2, here the insulating jacket 4, due to the previously described released cutting projection 30, after which, with further relative displacement of the hand-held device 1 to the object 2 in the circumferential direction u, for example a circumferential cut can be achieved.

[0080] Due to the given pivoting displaceability of the knife part 6 relative to the handle part 5, different pivoting positions of the knife part 6 result, preferably three working positions and a pivoted-in position.

[0081] In the pivoted-in position G, as shown, for example, in Figures 3 to 6 and 8, the knife part 6 is received in a slot-like receiving recess 32 of the handle part 5. During normal handling of the hand-held device 1, the receiving recess 32 is provided essentially on the underside of the handle part 5.

[0082] In this pivoted-in position G, the cutting edge 18 and the cutting projection 30 with the peripheral edge 22, as well as preferably also the guide shoe 24, are completely inserted into the receiving recess 32. In this pivoted-in position G, the knife guard 25 remains outside the receiving recess 32, at least partially covering it.

[0083] Furthermore, in this pivoted-in position G, as well as in other working positions, a locking mechanism is provided between the blade part 6 and the handle part 5. For this purpose, a locking part 33 in the form of a locking pin is provided in the handle part 5, which can be displaced perpendicular to the pivoting plane E along a geometric axis z and is biased toward a locking position by a spring 34.

[0084] The locking part 33 can, as also shown, penetrate holes 35 in the insert parts 11 and interact with the circumferential edge 54 of the knife-side eager eye 21.

[0085] At the end, the locking part 33 is provided with a pin-like handle 37 which passes through the grip part 5 in the area of ​​a bore 55 which opens freely outwards and by means of which an axial displacement of the locking part 33 along the axis z can be carried out counter to the restoring force of the spring 34.

[0086] On the circumference of the knife bearing eye 21, with an edge 54 extending substantially concentrically to the pivot axis x, various locking recesses 37 are formed, into which an adapted locking section 38 of the locking part 33 engages in a locking manner in the locking position (see, for example, Figure 32).

[0087] As a result of an axial displacement of the locking part 33 brought about by pressure on the handle 36, the locking section 38 is moved out of this interaction position with the locking recess 37 of the bearing eye 21, after which a waisted release section 39 with a reduced diameter compared to the locking section 38 enters the interaction area with the respective locking recess 37 (see, for example, Figure 35).

[0088] In the illustrated embodiment, a total of three locking positions result. Firstly, the previously described pivoted-in position G, which is assumed as a result of pivoting displacement of the blade part 6 from a working position in a second pivoting direction r'. In addition, two working positions, a first and a third working position A1 and A3, are preferably secured in a locking position, wherein in particular the first working position A1, starting from the pivoted-in position G, can be reached by pivoting the blade part 6 in a first pivoting direction r. A first pivot angle α between the pivoted-in position G and the first working position A1 of more than 90° up to approximately 180°, furthermore, for example, approximately 130 to 150° can result (see Figure 7a).

[0089] In order to be able to pivot the knife part 6, for example from the pivoted-in position G into the first working position Al, for example, an axial displacement of the locking part 33 along its geometric axis z is first necessary. The knife part 6, which is then released, can now be pivoted. The axial pressure applied to the locking part 33 during the pivoting displacement can be omitted because the locking part 33 prevents a backward displacement of the locking part 33 by the engagement of the circumferential edge 54 of the bearing eye 21 in the waisted release section 39. Only when the next locking position in the pivoting direction is reached and thus when the next locking recess 37 on the bearing eye 21 is reached is the locking part 33 moved back into the locking position via the spring 34.

[0090] A third working position A3 secured against detent can be provided between the pivoted-in position G and the first working position A1, wherein the relevant third pivot angle Y between the pivoted-in position G and the third working position A3 can be approximately 80 to 100°, furthermore, for example, approximately 90° and can thus correspond to approximately 5 / 10 to 8 / 10, furthermore approximately 6 / 10 to 7 / 10 of the first pivot angle a (see Figure 7a).

[0091] In a further embodiment, this third working position A3 can represent a safety position which, if the first working position A1 is not properly engaged, prevents pivoting into the receiving recess 32 and thus into the pivoted-in position G during an involuntary pivoting back of the knife part 6 in the second pivoting direction r'. Accidental pinching and, moreover, injury to one or more fingers grasping the handle part 5 in the area of ​​the receiving recess 32 are thus prevented. If the knife part 6 is not intentionally pivoted back, it falls into the detent securing this position in the third working position A3.As can be seen, for example, from the illustrations in Figures 22 and 23, in this third working position A3 there is a sufficiently large distance, in particular between the cutting edge 18 of the knife part 6 and the underside 56 of the handle part 5 following in the pivoting direction.

[0092] In the illustrated embodiment, there are three locking pivot positions of the knife part 6, namely the pivoted-in position G, the first working position A1 and the third working position A3.

[0093] In the above-described first working position A1, a conventional orientation of the blade part 6, in particular of the blade 17, results essentially in an extension of the handle part 5, in particular for making a longitudinal cut for cutting open, for example, an insulating jacket 4 along its longitudinal direction (see Figures 15 and 16). As can be seen, for example, from Figure 7a, the engagement structure 13 can, as is also preferred, extend beyond the blade 17 or the blade part 6 in the first pivoting direction r, and is thus exposed facing the back edge 19.

[0094] In the first working position A1, the hand-held device 1 can be moved in a pulling manner in the direction s along the object 2, wherein, in the illustrated embodiment, the insulating sheath 4 is severed by the cutting edge 18, particularly in the region of the hook-shaped cutting extension 23. The sliding shoe 24 extending inside the sheath of the insulating sheath 4 prevents damage to the wires 3 otherwise enclosed by the insulating sheath 4.

[0095] Alternatively, in this first working position A1, the knife part 6 can also be pressed by moving the hand-held device 1 in the opposite direction s', so that in this case the cutting of the object 2 takes place via the front edge 20 (see Figure 16).

[0096] To assist the cutting process, the user can apply pressure to the knife part 6 via the knife guard 25 using a finger 41, for which purpose the knife guard 25 can have a suitable recess 40.

[0097] In addition, the knife part 6 can also be used in pivoted positions that are not secured by a locking mechanism, for example in a pivoted position of the knife part 6 between the third working position A3 and the pivoted-in position G, as is shown, for example, in Figure 24. In this position, with an object 2 to be cut, for example an insulating sheath 4 of an electrical cable, placed against the underside 56 of the handle part 5 having the opening in the receiving formation 32, a circumferential cut can be made, for example in the case of objects 2 with a small diameter, wherein, as described above with regard to the first working position A1, pressure can also be exerted via the knife protection part 25 on the knife 17, in particular on the cutting edge 18.

[0098] The blade part 6 can also be pivotally displaced beyond the first working position A1, which can be locked into a preferably non-locking second working position A2 (see, for example, Figure 26). This preferably results in a free pivotal displaceability of the blade part 6 between the first working position A1 and a stop limit following in the first pivoting direction r. With respect to a greatest possible pivoting displacement, the blade part 6 can assume a second pivot angle ß of preferably more than 180° up to, for example, approximately 300°, further, for example, approximately 200 to 270° (see Figure 7a).

[0099] As can be seen particularly from the illustration in Figure 26, the blade part 6 in the second working position A2 is freely pivotable over a pivot angle range δ of, for example, approximately 70 to 90°. Here, the locking portion 38 of the locking part 33 interacts with an edge portion 57 of the bearing eye 21 on the blade part side. This edge portion 57 extends essentially on a circular arc oriented concentrically to the pivot axis x, with a radius that further essentially corresponds to the radius in the region of the locking recesses 37.

[0100] In both pivoting directions r and r', stops are formed in this second working position A2, on the one hand in a transition area 58 between the edge section 57 and the back edge 19 and on the other hand on a shoulder 59 formed between the edge section 57 and the locking recess 37 of the bearing eye 21 defining the first working position A1.

[0101] The second working position is preferably used for performing longitudinal cuts, which require a greater effort. The hand-held device 1 is used in a ratchet-like manner, with the handle 5 supported by its engagement structure 13 on the facing surface. of the object 2, for example the insulating jacket 4 (see Figures 27 and 28). The knife part 6 is pulled in the longitudinal direction of the object 2, as described with regard to the first working position A1, resulting in a pivoting displacement of the handle part 5 in the pivoting direction t while the engagement structure 13 rolls onto the object 2, whereby a toggle-like pulling action on the knife part 6 is achieved (see Figure 28). By pivoting back the handle part 5 in the pivoting direction t' without further support of the handle part 5, in particular the engagement structure 13, on the object 2 back into the starting position according to Figure 27, the next ratchet-like pulling of the knife part 6 through the object 2 is initiated.

[0102] The locking position of the pin-shaped locking part 33 can be blocked by a first blocking part 42. This can be a sliding part, as is also preferred, which can be linearly displaced from a blocking position, as shown, for example, in Figure 30, into a release position in a direction e substantially parallel to the orientation of the pivot plane E. The first blocking part 42 is arranged in the region of the end 10 of the handle part 5 adjacent to the locking part 33 and has a handle 46 passing through a slot-shaped opening 47 in the handle part 5.

[0103] The first blocking part 42 is loaded into the blocking position by a spring 51, in which blocking position the first blocking part 42 with a locking extension 49 underpins a circumferential radial shoulder 50 of the locking part 33 and thus prevents the locking part 33 as a whole from being displaced into a position that cancels the locking (compare Figures 30 to 32).

[0104] To release the blocking, the first blocking part 42 must be displaced in the direction of arrow e, after which the locking extension 49 releases the radial shoulder 50 and thus the locking part 33 for axial displacement (compare Figures 33 to 35).

[0105] Figure 34 shows the blocking part 42 in the held release position. After the axial displacement of the locking part 33 into the locking release position and subsequent release of the first blocking part 42, it rests circumferentially on the radial shoulder 50 of the locking part 33 via the locking extension 49.

[0106] If the knife part 6 reaches the next locking position during its pivoting about the pivot axis x, in which the next locking recess 37, viewed in the pivoting direction, interacts with the locking section 38 of the locking part 33, the locking part 33 is automatically displaced back into the locking position due to the action of the spring 34. During this displacement, the locking extension 49 of the first blocking part 42 loses its support on the radial shoulder 50. The blocking part 42 is pushed back into the position blocking the locking part 33 via the spring 51, following the locking part 33.

[0107] In a further embodiment, the first blocking part 42 can be secured by a second blocking part 43. The second blocking part 43 can be a pivoting part which is pivotally mounted on the handle part 5 about an axis 44 mounted in a bearing block 45 of the handle part 5 and having a geometric pivot axis y. This second blocking part 43 has a locking extension 48 which, in the blocking position, for example according to Figure 30, engages rearward of the handle 46 of the first blocking part 42 in the area of ​​the opening 47 that remains free in the blocking position of the first blocking part 42 and thus prevents the first blocking part 42 from sliding in the direction of arrow e.Only with the pivoting displacement of the second blocking part 43 from this fixed position in the direction of the arrow f (see separate detail in Figure 30) is the space for the sliding displacement of the first blocking part 42 released by removing the blocking extension 48 from the opening 47.

[0108] The above statements serve to explain the inventions covered by the application as a whole, which each independently develop the state of the art by at least the following combinations of features, whereby two, several or all of these combinations of features can also be combined, namely:

[0109] A hand-held device which is characterized in that the knife 17 can be locked in the first working position A1, which corresponds to a first pivoting angle a, and that after the locking is released, a free pivoting between the knife part 6 and the handle part 5 is possible in a pivoting angle range ö exceeding the first pivoting angle a in order to use the engagement structure 13.

[0110] A handheld device characterized in that the engagement structure 13 is a rib structure 14.

[0111] A hand-held device characterized in that the engagement structure 13 in the first working position A1 extends beyond the blade 17 in the first pivoting direction r.

[0112] A hand-held device characterized in that the blade part 6 can be pivoted into a third working position A3, which corresponds to a third pivot angle Y, and in that the blade part 6 can be locked in the third working position A3.

[0113] A hand-held device characterized in that the third swivel angle Y corresponds to one-tenth to nine-tenths of the first swivel angle a.

[0114] A hand-held device characterized in that the pivoted-in position G can be locked.

[0115] A hand-held device which is characterized in that the locking can be carried out between a handle part end 29 of the knife part 6 assigned to the handle part 5 and a locking part 33 provided in the handle part 5.

[0116] A hand-held device characterized in that the locking part 33 is movable perpendicular to the pivoting plane E.

[0117] A hand-held device characterized in that the locking part 33 can be locked in a locking position by a first blocking part 42.

[0118] A hand-held device characterized in that the first blocking part 42 is a sliding part movable in a plane parallel to the pivoting plane E between a release position and a blocking position.

[0119] A hand-held device characterized in that the sliding part can be locked in its blocking position by a second blocking part 43.

[0120] A handheld device characterized in that the second blocking part 43 is a flap part movable about a second pivot axis y.

[0121] A hand-held device characterized in that the handle part end 29 of the knife part 6 is received in the handle part 5.

[0122] A hand-held device characterized in that the knife 17 has a cutting edge 18 and a back edge 19.

[0123] A hand-held device characterized in that the knife 17 has a second free end with a front edge 20, which is remote from the handle part end 29 in a direction of longitudinal extension M.

[0124] A hand-held device which is characterized in that the cutting edge 18 has a cutting projection 30 which otherwise projects relative to the section of the cutting edge 18 running in the longitudinal extension M of the knife part 6 and in that the cutting projection 30 is formed on the end 29 of the knife 17 facing the handle part 5.

[0125] A hand-held device characterized in that the cutting projection 30 projects beyond the section of the cutting edge 18 immediately adjacent in the longitudinal extension M by a projection dimension h which is 1.5 mm or more.

[0126] A hand-held device which is characterized in that the cutting projection 18, in a view in which the cutting edge 18 is represented as a line, is formed in a gable-roof-like manner, wherein the projection edges running into the tip 61 are formed as cutting edges 18".

[0127] A hand-held device characterized in that the cutting projection 30 protrudes in the second pivoting direction r' relative to the cutting edge 18.

[0128] A hand-held device which is characterized in that a part of the knife 17 comprising the cutting edge 18 with the cutting projection 30 is received in a receiving recess 32 of the handle part 5 in the pivoted-in position G.

[0129] A hand-held device characterized in that the knife 17 has a sliding shoe 24.

[0130] A hand-held device characterized in that the knife 17 has a knife protection part 25 associated with the back edge 19.

[0131] A hand-held device characterized in that the blade guard 25 remains outside the receiving recess 32 in the pivoted-in position G.

[0132] A hand-held device which is characterized in that when the knife guard 25 is supported on the back edge 19 of the knife 17, the cutting edge 18 is exposed and the knife guard 25 covers not only a part of the back edge 19 but also a part of the front edge 20 and a transition 26 of the front edge 20 into the back edge 19.

[0133] A hand-held device characterized in that the blade guard 25 has a recess 40 in the direction of the longitudinal extension M for receiving a supporting finger 41 of a user.

[0134] A hand-held device characterized in that a part of the back edge 19 is exposed between the handle part 5 and the blade guard part 25.

[0135] A hand-held device characterized in that the front edge 20 is designed as a cutting edge 18'.

[0136] A hand-held device characterized in that the area of ​​the front edge 20 exposed beyond the blade protection part 25 has a length g that is less than 10 mm.

[0137] All disclosed features are essential to the invention (individually, but also in combination with one another). The disclosure of the application hereby fully incorporates the disclosure content of the associated / attached priority documents (copy of the prior application), also for the purpose of incorporating features of these documents into claims of the present application. The subclaims characterize, even without the features of a referenced claim, independent inventive developments of the prior art with their features, in particular for filing divisional applications based on these claims. The invention specified in each claim may additionally have one or more of the features provided in the above description, in particular with reference numbers and / or specified in the list of reference numbers.The invention also relates to designs in which individual features mentioned in the above description are not implemented, in particular insofar as they are clearly unnecessary for the respective intended use or can be replaced by other technically equivalent means. List of reference symbols 1 handheld device 28 section 2 Item 29 End 3 wires 30 cutting projection 4 Insulation jacket 31 projection 5 Handle part 32 Receptacle shape 6 Blade part 33 Locking part 7 Screw 34 Spring 8 handle shell 35 bore 9 Handle 36 Handle 10 second end 37 locking recess 11 Insert 38 Locking section 12 Screw 39 Release section 13 Intervention structure 40 Deepening 14 rib structure 41 fingers 15 pivot pin 42 first blocking part 16 Hole 43 second blocking part 17 knives 44 axle 18 Cutting edge 45 Bearing block 18' cutting edge 46 handle 18" cutting edge 47 opening 19 Dorsal edge 48 Retarsal process 20 Front edge 49 Bar extension 21 Bearing eye 50 Radial shoulder 22 edge 51 spring 23 Cutting extension 52 Bore 24 Sliding shoe 53 Contact surface 25 Blade guard 54 Edge 26 Transition 55 Hole 27 knife wide surface 56 bottom 57 Edge section Al first working position 58 Transition area A2 second working position 59 Shoulder A3 third working position 60 first end E swivel plane 61 Tip G swung-in position L longitudinal direction M Longitudinal direction a Length b Length c Length g Length d Length h Projection dimension e Direction k Distance f Direction m Length r First swivel direction p Angle bisector r' Second swivel direction s Direction s' Direction a Swivel angle t Swivel direction ß Swivel angle t' Swivel direction Y Swivel angle u Circumferential direction ö Swivel angle range x Swivel axis E Angle y Swivel axis z Axis

Claims

Claims 1. Handheld device (1) with a knife (17), wherein the handheld device (1) has a handle part (5) with a longitudinal extension (L), a first end (60) and a second end (10), and further has a knife part (6) with the knife (17), wherein the knife part (6) is associated with the second end (10) and is held on the handle part (5) so as to be pivotable about a first pivot axis (x) in a pivot plane (E) running in the direction of the longitudinal extension (L), for moving the knife (17) in a first pivot direction (r) from a pivoted-in position (G), in which the second end (10) limits the handheld device (1) in the longitudinal extension (L), into a first working position (A1), in which the knife (17) projects beyond the second end (10) in the longitudinal extension (L), wherein the knife part (6) in a second pivot direction (r z) can be moved back into the pivoted-in position (G) and the handle part (5) has an engagement structure (13) on the second end (10) for rolling support on an object (2) to be cut, characterized in that the knife (17) can be locked in the first working position (Al), which corresponds to a first pivot angle (α), and that after the locking is released, a free pivotability between the knife part (6) and the handle part (5) is possible in a pivot angle range (δ) exceeding the first pivot angle (α) in order to use the engagement structure (13).

2. Hand-held device according to claim 1, characterized in that the engagement structure (13) is a rib structure (14).

3. Hand tool according to one of the preceding claims, characterized in that the engagement structure (13) in the first working position (Al) extends beyond the knife (17) in the first pivoting direction (r).

4. Hand tool according to one of the preceding claims, characterized in that the knife part (6) can be pivoted into a third working position (A3) which corresponds to a third pivot angle (y), and that the knife part (6) can be locked in the third working position (A3).

5. Hand-held device according to claim 4, characterized in that the third pivot angle (y) corresponds to one-tenth to nine-tenths of the first pivot angle (a).

6. Hand-held device according to one of the preceding claims, characterized in that the pivoted-in position (G) can be locked.

7. Hand tool according to claim 6, characterized in that the locking can be carried out between a handle part end (29) of the knife part (6) assigned to the handle part (5) and a locking part (33) provided in the handle part (5).

8. Hand-held device according to claim 7, characterized in that the locking part (33) is movable perpendicular to the pivoting plane (E).

9. Hand-held device according to one of claims 7 or 8, characterized in that the locking part (33) can be blocked in a locking position by a first blocking part (42).

10. Hand-held device according to claim 9, characterized in that the first blocking part (42) is a sliding part movable in a plane parallel to the pivoting plane (E) between a release position and a blocking position.

11. Hand-held device according to claim 10, characterized in that the sliding part can be fixed in its blocking position by a second blocking part (43).

12. Hand-held device according to claim 11, characterized in that the second blocking part (43) is a flap part movable about a second pivot axis (y).

13. Hand tool according to one of claims 7 to 12, characterized in that the handle part end (29) of the knife part (6) is received in the handle part (5).

14. Hand tool according to one of the preceding claims, characterized in that the knife (17) has a cutting edge (18) and a back edge (19).

15. Hand tool according to one of claims 7 to 14, characterized in that the knife (17) has a second free end with a front edge (20) which is remote from the handle part end (29) in a direction of the longitudinal extent (M).

16. Hand-held device (1) with a knife (17), wherein the hand-held device (1) has a handle part (5) and a knife part (6) with the knife (17), wherein the knife part (6) has a longitudinal extension (M) and is fastened to the handle part (5) at a first end (29), wherein a further, second free end of the knife part (6) remote from the first end (29) in a direction of the longitudinal extension (M) has a front edge (20), wherein in addition the knife (17) has a cutting edge (18), wherein further both the front edge (20) and the cutting edge (18) are in a, over a section of the cutting edge (18) extending in the longitudinal extent (M) of the knife part (6) projecting sliding shoe (24), or hand-held device according to one of the preceding claims, characterized in that the cutting edge (18) has a cutting projection (30) which otherwise projects relative to the section of the cutting edge (18) extending in the longitudinal extent (M) of the knife part (6), and in that the cutting projection (30) is formed on the end (29) of the knife (17) facing the handle part (5).

17. Hand tool according to claim 16, characterized in that the cutting projection (30) projects from the section of the cutting edge (18) immediately adjacent in the longitudinal extension (M) by a projection dimension (h) which is 1.5 mm or more.

18. Hand tool according to one of claims 16 or 17, characterized in that the cutting projection (30) is formed in a gable-roof-like manner in a view in which the cutting edge (18) is represented as a line, wherein projection edges running into the tip (61) are formed as cutting edges (18").

19. Hand tool according to one of claims 16 to 18, characterized in that the cutting projection (30) in the second pivoting direction (r z ) protrudes relative to the cutting edge (18).

20. Hand tool according to one of claims 16 to 19, characterized in that the knife part (6) is movable between a pivoted position and a working position.

21. Hand tool according to claim 20, characterized in that a part of the knife (17) comprising the cutting edge (18) with the cutting projection (30) is received in a receiving recess (32) of the handle part (5) in the pivoted-in position (G).

22. Hand tool according to one of the preceding claims, characterized in that the knife (17) has a sliding shoe (24).

23. Hand tool according to one of claims 14 to 22, characterized in that the knife (17) has a knife protection part (25) associated with the back edge (19).

24. Hand tool according to claim 23, characterized in that the blade protection part (25) remains outside the receiving formation (32) in the pivoted-in position (G).

25. Handheld device (1) with a knife (17), wherein the handheld device (1) has a handle part (5) and a knife part (6) with the knife (17), wherein the knife part (6) has a longitudinal extension (M) and is fastened to the handle part (5) at a first end (29), wherein a further, second free end of the knife part (6), remote from the first end (29) in a direction of the longitudinal extension (M), has a front edge (20), wherein the knife (17) further has a cutting edge (18) and the knife part (6) has a knife protection part (25) which covers a back edge (19) of the knife (17) facing away from the cutting edge (18), or handheld device according to one of the preceding claims, characterized in that when the knife protection part (25) is supported on the back edge (19) of the knife (17), the cutting edge (18) is exposed and the Blade protection part (25) in addition to a part of the back edge (19) also a part of the front edge (20) and a transition (26) of the front edge (20) into the back edge (19).

26. Hand tool according to claim 25, characterized in that the blade protection part (25) has a recess (40) in the direction of the longitudinal extent (M) for receiving a supporting finger (41) of a user.

27. Hand tool according to one of claims 25 or 26, characterized in that a part of the back edge (19) is exposed between the handle part (5) and the blade protection part (25).

28. Hand tool according to one of claims 25 to 27, characterized in that the front edge (20) is designed as a cutting edge (18').

29. Hand tool according to one of claims 25 to 27, characterized in that the region of the front edge (20) exposed beyond the blade protection part (25) has a length (g) which is less than 10 mm.

Images