Pressing tool

Abstract

A motorized manually operated pressing tool, in particular a crimping tool, with a fixed holding part, in which at least one pressing jaw is pivotably mounted about a pivot axis. The pressing jaw forms a working area and an impingement region extending in the longitudinal direction of the pressing jaw. In order to carry out a pressing operation the impingement region can be acted upon with an impinging part that is movable relative to the impingement region. The impinging part is movable in the longitudinal direction of the impingement region by exertion of manual force and by a motor.

Claims

1. A pressing tool comprising: a fixed support part; a pressing jaw pivotably mounted on the fixed support part about a pivot axis, the pressing jaw forming a working area on a first side of the pivot axis and an impingement region on a second, opposite side of the pivot axis, the impingement region extending in a longitudinal direction of the pressing jaw; a motor; an impinging part that is movable relative to the impingement region in the longitudinal direction of the impingement region, wherein in order to carry out a pressing operation the impingement region can be acted upon with the impinging part by exertion of manual force and by force from the motor; and a travelling part movable relative to the impinging part; wherein the impinging part is movable between a first position and a second position, wherein in the first position the impinging part is at a first distance relative to the travelling part or is in contact with the travelling part, wherein in the second position the impinging part is at a second distance relative to the travelling part, the second distance being greater than the first distance, wherein the impinging part is moved by hand into the second position, and wherein the travelling part is further movable through the second distance by motor force so as to contact the impinging part and move the impinging part.

2. A pressing tool having a longitudinal direction, comprising: a fixed support part; a first pressing jaw pivotably mounted on the support part about a first pivot axis, the first pressing jaw forming a first working area on a first side of the first pivot axis and a first impingement region on a second, opposite side of the first pivot axis, the first impingement region extending in the longitudinal direction of the tool; a second pressing jaw pivotably mounted on the support part about a second pivot axis, the second pressing jaw forming a second working area on a second side of the second pivot axis and a second impingement region on a second, opposite side of the second pivot axis, the second impingement region extending in the longitudinal direction of the tool; an electric motor; a transmission; an axially fixed threaded spindle having a longitudinal axis extending in the longitudinal direction of the tool, the spindle extending between the first and second impingement regions of the first and second pressing jaws, the spindle overlapping the first and second impingement regions perpendicular to the longitudinal axis thereof, wherein the electric motor, the spindle and the transmission are arranged one behind the other in the longitudinal direction of the tool; and an impinging part longitudinally movable relative to the first and second impingement regions, wherein in order to carry out a pressing operation the first and second impingement regions can be acted upon with the impinging part by exertion of manual force on the impinging part and by force from the motor on the impinging part, the impinging part being pulled for completion of a pressing by the electric motor in a direction toward the electric motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Hereafter the invention is further explained on the basis of the enclosed drawing, which represents only one exemplary embodiment, however. The drawings show:

(2) FIG. 1 is a side view of the pressing tool;

(3) FIG. 2 is an enlarged representation of the working head shown in accordance with FIG. 1, before the start of a pressing operation;

(4) FIG. 3 is a representation in accordance with FIG. 2, showing an almost complete pressing operation;

(5) FIG. 4 is a perspective view of an entire manual pressing device;

(6) FIG. 5 is a perspective view of a device head, without cladding parts, obliquely from the front;

(7) FIG. 6 is an exploded view of the device head in accordance with FIG. 5;

(8) FIG. 7 is a plan view of the device head in accordance with FIG. 5;

(9) FIG. 8 is a view in accordance with FIG. 7, after a first manual activation of the lever;

(10) FIG. 9 is a a representation in accordance with FIG. 7 and/or FIG. 8, after further pivoting of the lever part and subsequent motor activation;

(11) FIG. 10a is a representation of a further embodiment in a view in accordance with FIG. 8;

(12) FIG. 11 is a perspective oblique front view of the embodiment in accordance with FIG. 10 before activation;

(13) FIG. 12 is a perspective view of a further embodiment of the invention;

(14) FIG. 13 is an exploded view of the embodiment in accordance with FIG. 12;

(15) FIG. 14 is a side view of the embodiment in accordance with FIG. 12 and/or FIG. 13, in a non-activated position;

(16) FIG. 15 is a representation in accordance with FIG. 14 in a first manual activation to clamp a workpiece;

(17) FIG. 16 is a continuation of the activation starting from the representation in accordance with FIG. 15, with the motorized operation triggered;

(18) FIG. 17 is a representation in accordance with FIG. 14 during the motor supported pressing operation;

(19) FIG. 18 is a representation in accordance with FIG. 17, at the termination of the motorized pressing operation;

(20) FIG. 19 is a representation relating to emergency unlocking;

(21) FIG. 20 is a representation of a further embodiment with roller activation with regard to the pressing jaws, with rollers in contact with the pressing jaws, in the open position;

(22) FIG. 21 is a representation in accordance with FIG. 20, in the closed position;

(23) FIG. 22 is a further embodiment relating to activation using rollers, wherein the rollers are in contact with the impinging part, in the open position;

(24) FIG. 23 is a representation in accordance with FIG. 22 in the closed position;

(25) FIG. 24 is a further embodiment of an activation of the pressing jaws using rollers, with the rollers on the impinging part, wherein the rollers are directly supported against each other, in the open position; and

(26) FIG. 25 is a representation in accordance with FIG. 24 in the closed position of the pressing jaws (cutting jaws).

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

(27) Represented and described is a motor-operated pressing tool 1 which comprises an electric motor 2 and a gearing unit 3 in a rod-like sequential arrangement. On the side 3 of the electric motor 2 facing away from the gears, a rechargeable battery 4 is provided, preferably additionally in a rod-like arrangement. A housing 34 is indicated in FIG. 1 by a dashed line.

(28) The pressing tool 1 is preferably also formed only in a rod-like manner, with no branching housing part (in relation to a plan view, for example in accordance with FIG. 1), perhaps comparable in contour to a flashlight. A head region, the contours of which are thickened relative to a handle region, is defined by the external contour of the pressing jaws and/or a housing part overlapping them (and with respect to the movement, surrounding them with a certain amount of play in the closed position).

(29) At the end opposite the working area, a battery is preferably arranged. As is evident in FIG. 1, this can mean a thickening of the housing or the rod end respectively. It can however also be designed to be aligned with the contour of the handle region, that is, as it were as a further extension of the handle region.

(30) The working area of the pressing tool 1 is formed by two pressing jaws 5, 6, which are preferably both mounted in a rotational manner, in the exemplary embodiment so that they can pivot about axes 7, 8, on a support part 9 of the pressing tool 1.

(31) The pressing jaws can be constructed with both a cutting and/or pressing geometry, which is not shown in detail. Such a configuration is provided, for example, in the case of the pressing jaws of the pressing tool known from the above cited document DE 197 09 017 A1. Alternatively, pressing inserts can also be fixed to the working areas of the pressing jaws. In this regard reference is made to the configuration in a pressing tool in accordance with DE 198 02 287 C1 or U.S. Pat. No. 6,053,025 A. On the rear of the respective working area 10, 11 of a pressing jaw 5, 6, an impingement region 12, 13 is formed on each pressing jaw, extending in the longitudinal direction of the pressing jaw. The longitudinal direction of the impingement region in the exemplary embodiment is the same longitudinal direction as that of the rod-shaped pressing tool 1 overall. It corresponds to a longitudinal axis L of the pressing tool. An impingement region is preferably constructed on the inner edge of a pressing jaw. In the case of two pressing jaws, the impingement regions are preferably designed to be facing one another.

(32) In addition it is also the case that a pressing jaw 5, 6 is elongated perpendicular to the axes 7, 8, i.e. with a length larger than its width. Also, to this extent a longitudinal direction of the pressing jaws 5, 6 is formed.

(33) In order to carry out a pressing operation, an impinging part 36 is provided (see for example FIG. 2). The impinging part 36 is movable relative to both of the impingement regions 12, 13 in the exemplary embodiment, of both of the two pressing jaws 5, 6 also shown in the exemplary embodiment. It is preferably to be moved in the longitudinal direction of a pressing jaw 5, 6, or of an impingement region 12, 13 of a pressing jaw.

(34) In a first exemplary embodiment, in relation to FIGS. 1 to 19, on account of the specifically implemented control arm activation of the pressing jaws, to be explained in detail below, the impingement regions are not acted upon by a longitudinal movement of a part such as a roller, but rather moved by the control arm activation alone, without direct application of force.

(35) In addition the impinging part 36 can preferably be moved linearly and in the longitudinal direction of the impingement regions 12, 13 it is movable both by exertion of manual force by means of a lever part 14 and in a motorized manner by the motor. The impinging part can be also be movable by motorized means alone.

(36) Independently hereof the essential constructional design of the pressing tool is also of importance. With regard to the representation of FIGS. 1 and 2, in which it is evident that the geometrical pivot axes 7, 8 are shown as dots, a fixed spindle 25 is provided in the direction of longitudinal extension of the pressing jaws 5, 6. This spindle is fixed in the axial direction. More preferably, the spindle is also fixed in the radial direction. It can however be rotated around its longitudinal axis in order to implement the spindle function. With this spindle, that correspondingly extends in its longitudinal direction, preferably with a lateral overlap, compare overlap region u relative to the plan view in accordance with FIG. 2, to one or both impingement regions 12, 13, in a compact design the impinging part 36 can be driven to the final action upon the pressing jaws 5, 6. Fundamentally this constructional configuration is also significant without any additional and/or preferably initial, possible manual activation by the lever part 14.

(37) A further general characterizing feature is given by the fact that in order to carry out the pressing operation the impinging part 36, preferably moved by the spindle 25, must be moved from a position near the working area 10 or 11 to a position distant from the working area 10 or 11 (compare also the difference between FIGS. 2, 3).

(38) The lever part 14 is preferably angular in shape, as in some exemplary embodiments. A first lever section 15 which has a second longitudinal extension is shown at least partially extending, in relation to a view of the press tool from below, in overlap with the motor and/or the gears. It serves as a handling region, which can be held by one hand that is holding the motor-/transmission area at the same time.

(39) Relative to a plan view in accordance with FIG. 2 the lever part 14 lies on one side of the spindle 25, viewed more generally on one side of the longitudinal axis L of the manual pressing tool, free to be activated, but in accordance with one of the described embodiments it is rotatably mounted on the other side of the longitudinal axis L and/or the spindle 25 (compare also mounting region 18 yet to be explained in further detail below).

(40) A second lever section 16 which has a first longitudinal extension extends at an angle hereto, wherein the motor and the transmission extend in the space enclosed by the angle. The second lever section 16 also intersects a longitudinal axis L of the pressing device. The angle enclosed between the first and second longitudinal extension is preferably an obtuse angle, more preferably an angle between 90 and 150.

(41) The lever part 14 and in the exemplary embodiment preferably the lever section 16 are preferably connected to the impinging part 36 by a hinge. For this purpose a rotary joint 17 is provided on the impinging part 36 and the lever part 14 or lever arm part 16 respectively. The lever part 14 is preferably of dual construction, extending on both sides of the impinging part 36, or at least preferably forked in the region of the impinging part 36. In addition, in plan view of the press tool preferably in accordance with e.g. FIG. 2, both parts or the forked area are overlapping.

(42) The rotary joint 17 in this case is additionally preferably arranged between the mounting of the lever part 14, fixed to the housing, and the free end of the first lever section 15. In this arrangement the hinged connection between the lever part 14 and the impinging part 36 can be provided in such a manner that the lever section, on which the hinged connection to the impinging part 36 is constructed, can move relative to the impinging part 36 at least in its longitudinal direction.

(43) The said housing-fixed mounting of the lever part 14 is preferably constructed at the end facing away from the lever arm section 15. Here a mounting region, preferably a rotary mounting region 18, is constructed on the support part 9.

(44) The lever part 14 is moveable in the mounting region 18 relative to the support part 9 and/or to a housing 34 of the pressing tool 1. In detail, in the relevant area of the lever part 14 a slot 19 is constructed, which is penetrated for example by a pin 20 fixed to the support part.

(45) A spring 22 which is preferably pre-tensioned acts between this pin 20 and a counter-bearing 21 fixed to the lever. The spring 22 seeks to move the counter-bearing 21 away from the housing-fixed mounting formed by the pin 20, so that the pin 20 is located in the slot 19 at a first end region. If the lever part 14 is now acted upon by manual force and the pressing jaws 5, 6 are thereby pivoted, they can thus be brought first by manual power into a position, in which a part gripped between the pressing jaws, for example a cable shoe, is held but in practise is not yet pressed. In this movement section, the mounting position does not change. The rotational mounting region 18 acts like a fixed bearing. If the manual force on the lever part is then further increased, the force of the spring 22 is eventually overcome so that the counter-bearing 21 is moved towards the pin 20 against the force of the spring 22.

(46) This manual force corresponds to the clamping pressure applied manually to the workpiece which is held in a pressing jaw, in the exemplary embodiment preferably directly between the assigned pressing jaws 5, 6.

(47) At the same time this motion causes a switch 23 to be no longer acted upon by the lever part 14. The lever part 14, and/or concretely in the exemplary embodiment the lever section 15, in order to act upon the switch 23 until the said movement takes place, preferably comprises a round section 35 which has a radius relative to the circumferential edge of the round section 35 that corresponds to the radial distance of a point of this circumferential edge from the first mounting site of the lever part 14, i.e. to a geometric midpoint relative to a plan view of the pin 20. If the switch 23 as a result is no longer acted upon by the lever part 14, this means that a pre-sprung switching arm 24 of the switch 23 can swing out and thus cause switching to occur. Actually in doing so the electric motor 2 is switched on, whereby a spindle 25 is set into rotation via a gearing unit.

(48) Also, after a movement of the counter-bearing 21 towards the pin 20 has taken place, until the corresponding force decays again the then newly adopted mounting position is a fixed mounting position. This fixed mounting position is evidently also then supported by the travelling part 26, which is further explained hereafter. It then preferably no longer matters that another manual force is applied.

(49) A travelling part 26 moves on the spindle 25, wherein said part is thus moved by the spindle 25, which is set into rotation by the motor, towards the impinging part 36, and then moves the impinging part 36 with motor power further in the longitudinal direction, towards the electric motor 2 of the pressing tool 1. The travelling part 26 can be implemented as a spindle nut to cooperate with the spindle 25.

(50) The impinging part and the travelling part are then finally located in the position of FIG. 3.

(51) The pressing jaws 5, 6 are moved by the impinging part 36, preferably via control arms 27, 28. One or both control arms 27, 28 are in this case connected on the one hand in a rotationally moveable manner to the impinging part 36 and on the other hand in a rotationally moveable manner to a pressing jaw 5, 6. The connection to a pressing jaw 5, 6 here is more preferably provided at one end of a pressing jaw 5, 6 facing away from a working area 10, 11 with respect to an axis 7, 8. As is evident, the control arms execute, relative to the longitudinal extension of the pressing jaws 5, 6, a positioning movement until they extend almost linearly oriented to each other. This results in a knee lever effect. It is also possible that the control arms 27, 28 are moved into a dead point position which in practice preferably corresponds to an aligned position, or even a certain amount beyond this. This however takes place first, preferably until shortly before the dead point position, against the force of a first part 30 of the reset spring 29. In a further region then against the force of a second part 31 of the reset spring 29.

(52) The second part 31 of the reset spring 29 has a steeper spring characteristic, and in each case on cessation of the motor power causes a reverse movement of the impinging part 13 to a position where the top dead point position is no longer valid and according to the reset spring 29, or then in particular according to the first part 30 of the reset spring 29, a return movement takes place into the position according to FIG. 1. This return movement of the impinging part 13 is preferably linked to the return movement of the travelling part 26. The travelling parts 26 is preferably moved by means of the spindle 25, now rotated in the opposite direction by motor power, and so releases the space for the spring-supported return movement of the impinging part 13 which is not yet so far engaged with the spindle.

(53) With regard to the switching of the electric motor, a second switch 32 is provided, which in the corresponding position of the impinging part 13 or travelling part 26 causes the electric motor to switch off and in the exemplary embodiment preferably initiates a reverse rotation of the electric motor, to move the travelling part 26 by means of the spindle 25 back into the starting position. Here, a third switch 33 is then more preferably provided, which finally turns off the electric motor until a new pressing operation takes place.

(54) It is evident that the impinging part 36 and the travelling part 26 are coaxial and, as is the case in the exemplary embodiment can move on the spindle 25. In this case the travelling part 26 is in direct threaded engagement with the spindle 25, while the impinging part 36 overlaps the spindle in the manner of a sheath and is movable relative to the spindle without engagement with it.

(55) In FIG. 4, a perspective representation of an entirely manual pressing tool is shown. Housing covers 37, 38 can be seen, which in the exemplary embodiment overlap the two pressing jaws 5, 6 in a lower region, i.e. one facing the body of the device. The overlap preferably extends beyond the axes 7, 8 and as is clear in the exemplary embodiment, about which the pressing jaws 5, 6 can be pivoted.

(56) The lever part 16 protrudes downwards with respect to the lever section 15, i.e. towards the body of the device, on one side from a housing cover 37, 38. With regard to a handle region 39, the lever part 14, or the lever section 15, is arranged on the top, i.e. on the side with the pressing jaws.

(57) Further details on this point can also be deduced from FIG. 5. In particular that it is provided that in the activated condition, as forms the basis of FIG. 5, the lever section 15 fits into a correspondingly formed housing receptacle 40.

(58) From the exploded view of FIG. 6 it can be deduced that the support part 9 which supports the axles 7, 8 of the pressing jaws 5, 6, preferably also has a guide recess 41. The guide recess 41 is more preferably formed as an elongated slit. In the guide recess 41, a guide projection 42 of the impinging part 36 can be guided. The guide projection 42 can extend so far through the guide recess 41, as can also be deduced for example from FIG. 7, that it serves as a counterstop for the lever section 16.

(59) The switch 33 provided at the jaw end of the manual pressing tool or at the spindle end can preferably, and also independently of the exemplary embodiment shown in FIG. 6 or FIG. 7 for example, can be activated by a rotationally mounted lever 43. The lever section 16 in this case acts upon the lever 43 and this acts upon the switch 33.

(60) In FIG. 8, the manually operated position, which is not yet triggering any motor activation, is shown. A press blank 44 is already held in the jaws of the pliers with a certain contact pressure, however.

(61) In FIG. 9, the complete closure of the pressing jaws 5, 6 is illustrated, after the motor activation has taken place. In this exemplary embodiment, as is preferred, a part of the impinging part 36, here the guide projection 42, is also used for activating the switch 32.

(62) The additional embodiment shown with reference to the FIGS. 10 and 11 is characterized in that the lever part 14 acts upon a switch part 46 by means of a control arm 45. The switch part 46 is mounted in the same manner as the lever section 16 in the previously described exemplary embodiment, and is thus also pre-tensioned by the spring 22 in the same manner. The support of the switch part 46 on the impinging part 36 thus also provided here, preferably also on the guide projection 42, also produces the possible lever effect here, in order to trigger the motor support under in the event of stronger loading on the lever 14.

(63) Under heavy loading the switch part 46 rotates about a support point on the guide projection 42, so that its end assigned to the switch 23 moves away from this (against the force of the spring 22) and as a result the motor is switched on in order to trigger the motor activation of the impinging part 36.

(64) In the embodiment of FIG. 10 as is evident, the lever 14 is more preferably mounted on the side of the spindle 25, cf. axis of rotation 47 on which the lever section 16 is also free to be activated.

(65) From the illustration of FIG. 11 it can be seen that in the exemplary embodiment a circuit board 48 is arranged, and preferably above the support part 9. The circuit board 48 preferably supports all switches 23, 32 and 33 provided here. In this case another fourth switch 49 is preferably also provided. The switch 49 is used to interrupt motor activity if the lever section 15 is moved in the opposite direction to a movement that can be carried out to perform a pressing operation, which preferably and in the exemplary embodiment is directed towards the handle region 39. In this case an extension of the lever 15 can act on the switch 49, whereby the motor is disengaged, so that no further pressing operation takes place. At the same time this preferably also triggers the release of the impinging part, so that the jaws of the pliers open again.

(66) Before a complete execution of a pressing operation, a release of the impinging part for a return stroke movement can thus be carried out by the activation of a switch. The release also preferably comprises the fact that the motor is switched on again with the opposite rotation direction, the travelling part is thereby moved back and the release of the impinging part therefore takes place.

(67) In the exemplary embodiment, a lighting means 50 is additionally arranged on the circuit board 48, in the form of a light-emitting diode. The lighting means 50 radiates, in the direction of a movement of the impinging part 36, directed towards the free end of the pressing jaws 5, 6. A corresponding opening, or light aperture is preferably also provided in one or both above mentioned housing covers 37, 38 for this purpose.

(68) It is further preferred, as is clear for example from FIG. 8, that a lubricant supply 51 is provided, assigned to a free end of the spindle 25. The lubricant supply 51 is accommodated in a sheath 52, which is arranged with its opening directed towards the spindle, and preferably also overlapping the free end of the spindle.

(69) With reference to FIGS. 12 to 19, a further embodiment and the related sequence of events during an activation is described. Equivalent parts are labeled with the same reference numerals.

(70) An intermediate part, implemented in the embodiment of FIGS. 10 and 11 as a control arm 45, is implemented in the embodiment of FIGS. 12 to 19 as an intermediate lever 53. The intermediate lever 53 is fixed to the housing via an axle 54. The intermediate lever 53, which however can evidently apply in the same manner to the lever or lever section 16 or the control arm 45 of the previous embodiments, is guided underneath the circuit board 48.

(71) The intermediate lever 53 is more preferably implemented as an angled lever. In areas extending at an angle, preferably approximately at right-angles to each other, firstly the cooperation with the lever part 14 is provided and secondly the cooperation with the guide projection 42.

(72) The cooperation with the guide projection 42 is preferably provided by a positive-locking fit. A stepped recess on the intermediate lever 53 creates an impingement surface that rests on the guide projection 42 in a direction facing away from the pressing jaws.

(73) The cooperation of the intermediate lever 53 and the lever part 14 is also preferably provided in a positive-locking manner in this exemplary embodiment. Specifically, a toothing system 55 is implemented. In this arrangement preferably only a few teeth are realized in each case, in the execution example two teeth.

(74) Of importance also is the fact that the teeth 56 of the lever part 14 have a greater width than the teeth 57 of the intermediate lever 53. This is possible, for example, because the intermediate lever 53 preferably consists of a harder material and/or one with a higher load-bearing capacity than the lever part 14: the lever part 14 preferably consists of a hard plastic while the intermediate lever part 53 is a metal part.

(75) The triggering of the pressing operation by overcoming a manually applied clamping pressure is provided in the exemplary embodiment of FIGS. 12 to 19 by a mobility of the lever part 14 relative to the housing.

(76) Specifically, the lever part 14 has a mounting axle 58, which is accommodated in a slot 59 on the housing. By means of a pressure spring 60 supported on the housing, in the starting condition of e.g. FIG. 14 the lever part 14 is pre-tensioned with its mounting axle 58 against one end of the slot 59. In the course of an activation, compare the difference between FIGS. 15 and 16, if as a result of which a manually applied clamping pressure on the workpiece located in the crimping jaws is exceeded, the lever part 14, together with the mounting axle 58, is displaced in the slot/slots 59 respectively, in the exemplary embodiment in the direction of the spindle 25. The switch 62, which functionally corresponds to the switch 23 already described above, is thus activated. Here with the difference that the switch 62 is directly acted upon by the lever part 14.

(77) By activation of the switch 62 the motor is started and with it in the exemplary embodiment the rotation of the spindle 25 is triggered, and as a result also the movement of the travelling part 26 and therefore the motorized movement of the pressing jaws 5, 6 into the pressing position.

(78) While in manual operation, compare the difference between the positions in FIGS. 14 and 15, only the impinging part 36 is first moved along the spindle, after the motor operation is started, compare the difference between FIGS. 16 and 17, the spindle causes the travelling part 26 to move, which then by exertion of pressure on the impinging part 36 causes the motor supported pressing operation to be carried out.

(79) The attainment of the pressing position, as also in the case of the exemplary embodiments described above, is detected by the switch 32.

(80) The switch 33 is provided for the start/end of the motor operation respectively. If the motor operation is started via the switch 62, the switch 33 detects the actual motion of the travelling part 26 or the return of the travelling part 26 back into its original position, whereupon the motor switches off.

(81) In addition a facility for an emergency activation is provided. In the exemplary embodiment this is obtained concretely by means of the switch 61. The intermediate part, or concretely the intermediate lever 53 in the exemplary embodiment, can also be moved by means of the lever part 14 in the opposite direction with respect to its impingement movement. For example on reaching the position of FIG. 16, if an emergency power off is desired, in this case the intermediate lever 53 can be moved counterclockwise, with respect to the illustration, in order thus to actuate the switch 61, cf. FIG. 18 (intermediate position) and FIG. 19.

(82) The mounting axle 58 is additionally preferably connected to the lever part 14 in a rotationally fixed manner. As a result, a certain frictional resistance is produced during the movement of the lever part 14 with respect to the pressure spring 60. This counteracts an unintentional movement of the lever part 14 into the emergency position.

(83) Such an increased friction can also be obtained by other measures. For example, by a somewhat tight passage of the mounting axle 58 in the slot 59.

(84) In the exemplary embodiments of FIGS. 20 to 25 exemplary embodiments are shown in a schematic representation, in which the impingement of the pressing jaws (which as above, within the scope of the invention can also be cutting jaws) are represented by rolling bodies such as in particular, rollers.

(85) In the embodiment of FIGS. 20 and 21, two rolling bodies are mounted, here rollers 63, 64, each on one pressing jaw 5, 6. They can rotate about a respective axle 65, 66 rigidly connected to the pressing jaw 5, 6.

(86) The impinging part 36 in this exemplary embodiment has unrolling edges 67, 68, that during the movement of the impinging part 36 relative to the spindle 25 or to a linear guide generally act upon the rollers 63, 64, and at the same time act upon the pressing jaws at their rear end region, that is to say on the end region of the pressing jaws 5, 6 facing the electric motor and/or the handle region, in a spreading manner or so as to move them apart. For this purpose the unrolling edges 67, 68 are formed such that they increase in width with respect to their edge contour towards the jaw side of the tool. It is obvious that in a lateral view of the unrolling edge by contrast, this manifests itself preferably as an unrolling surface. The unrolling surface can in this context correspond to a height (extension in the axial direction) of the rollers 63, 64 or to a part of this height, of approximately 1/10 to 9/10 of the height.

(87) The impinging part 36 further comprises one or two guide recesses 69 and 70 respectively, with which the pressing jaws 5, 6 cooperate, in the execution example, via a pin 71, 72 respectively. The guide recess 69 or 70 is preferably formed, as is evident, as a slot. This guide recess 69, 70 and the pins 71, 72 cooperating therewith serve only to the mandatory return motion of the pressing jaws 5, 6 back into the opening position in accordance with FIG. 20 after execution of a pressing operation, i.e. from the position in accordance with FIG. 21. Preferably, virtually no substantial forces, in particular no compression forces, are thereby transmitted. The formation of a corresponding recess could also be provided on the pressing jaw and that of the pin on the impinging part.

(88) Apart from this, the embodiment and the functional sequence in a device in accordance with FIGS. 20 and 21 correspond to one of the embodiments described above.

(89) In particular the impinging part 36 here preferably also has a guide projection 42, and as a result of an action by the lever part 14, preferably on the guide projection 42, the pressing jaws 5, 6 are to be moved into a first clamping position via an initial manual activation. Alternatively a magnetic entrainment could also be provided, for example. This naturally also relates to all embodiments described here.

(90) The embodiment of FIGS. 22 and 23 differs from the embodiments of FIGS. 20 and 21 essentially in that the rollers 63, 64 are mounted on the impinging part 36 and move with it. Correspondingly the axles 65, 66 are also mounted on the impinging part 36.

(91) In similar manner a reversed configuration with respect to the guide recesses 69 and 70 is preferably also provided. These are now formed on the pressing jaws, the assigned ends of the pressing jaws 5, 6, while the pins 71, 72 are now rigidly connected to the impinging part 36.

(92) In detail it is evident in the execution example that the impinging part 36 for mounting the axles 65, 66 or the pins 71, 72 comprises one or two opposite (in the illustrations only one is visible) mounting carriers 73. One mounting carrier extends at right angles to a longitudinal axis L or to an extension of the spindle 25.

(93) For cooperating with the rollers 63, 64 the pressing jaws 5, 6 in the exemplary embodiments of FIGS. 20 to 25 respectively each have one concave shaped impingement region 12, 13.

(94) In the exemplary embodiment of FIGS. 24 and 25, in contrast to the exemplary embodiment of FIGS. 22 and 23, two rollers 63, 64 are provided, which are directly braced against each other on their region facing away from an impingement region 12, 13 of a pressing jaw 5, 6. They roll off onto each other there. This is evidently favorable in terms of forces, since the compression forces now no longer have to be substantially absorbed in the axles 65, 66.

(95) Because it is subsequently additionally preferable, however, that the spindle 25 or a corresponding linear guide continues to penetrate the impinging part 36, in the further detail of the exemplary embodiment given in FIGS. 24 and 25 four rollers 63, 64 are preferably provided, two of which are arranged in each case, preferably in alignment, one above the other. Between two cooperating rollers 63, 64, these pairs being arranged on one another, a stepped interval is accordingly produced which is used to provide the required access opening for the spindle 25 or linear guide.

(96) Otherwise in this exemplary embodiment an identical functionality is also provided as is found in the exemplary embodiments described previously, with one or more of the possible different arrangements described there in detail.

(97) All features disclosed are (per se) essential to the invention. The disclosure of the application hereby also incorporates the disclosed content of the associated/attached priority documents (copy of the preliminary application) in full, including for the purpose of incorporating features of those documents into claims of the present application. The dependent claims in their optionally stand-alone version characterize independent inventive extensions of the prior art, in particular for making partial applications on the basis of these claims.

LIST OF REFERENCE NUMERALS

(98) TABLE-US-00001 1 Pressing tool 2 Electric motor 3 Gearing system 4 Rechargeable battery 5 Pressing jaw 6 Pressing jaw 7 Axle 8 Axle 9 Support part 10 Working region 11 Working region 12 Impingement region 13 Impingement region 14 Lever part 15 Lever section 16 Lever section 17 Rotary joint 18 Rotary mounting region 19 Slot 20 Pin 21 Counter-bearing 22 Spring 23 Switch 24 Switching arm 25 Spindle 26 Travelling part 27 Control arm 28 Control arm 29 Reset spring 30 first part 31 second part 32 Switch 33 Switch 34 Housing 35 Round section 36 Impinging part 37 Housing cover 38 Housing cover 39 Handle region 40 Housing receptacle 41 Guide recess 42 Guide projection 43 Lever 44 Press blank 45 Control arm 46 Switch part 47 Rotational axis 48 Circuit board 49 Switch 50 Lighting Means 51 Lubricant supply 52 Sheath 53 Intermediate lever 54 Axle 55 Toothing system 56 Teeth 57 Teeth 58 Mounting axle 59 Slot 60 compression spring 61 Switch 62 Switch 63 Roller 64 Roller 65 Axle 66 Axle 67 Unrolling edge 68 Unrolling edge 69 Guide recess 70 Guide recess 71 Pin 72 Pin 73 Mounting carrier L Longitudinal axis u Overlap region