CN107921611B

CN107921611B - Hand tool

Info

Publication number: CN107921611B
Application number: CN201680038409.XA
Authority: CN
Inventors: T.勒奇; A.H.格罗滕
Original assignee: Orbis Will & CoKg GmbH
Current assignee: Orbis Will & CoKg GmbH
Priority date: 2015-06-29
Filing date: 2016-06-16
Publication date: 2020-10-16
Anticipated expiration: 2036-06-16
Also published as: CN107921611A; EP3313618A1; EP3313618B1; WO2017001205A1; DE102016102785A1; DE102016102785B4

Abstract

The invention relates to a hand tool (1), in particular a hand tool in the form of pliers, scissors or the like, it has two tool halves (2, 3) which are arranged crosswise to one another in the hinge region and which are connected to one another in a pivotable manner about a pivot axis (x) by means of a hinge pin (4), wherein the tool halves (2, 3) form the mouth parts (7, 8) on one side of the hinge and the handle on the other side of the hinge, and wherein, on the handle side of the tool halves (2, 3), between the legs (5, 6) of the tool halves (2, 3), a rotary torsion spring or compression spring is arranged which acts in a plane tensioned by the handle-side legs (5, 6) of the tool halves (2, 3) and supports the opening movement, wherein the tool halves (2, 3) extend in the region of the hinge in an overlapping region (U) overlapping one another. In order to further improve the hand tool (1), in particular a pliers, scissors or the like, in terms of a design that is advantageous in terms of production technology, it is provided that the pivot axis of the hinge lies outside the contour of the restoring spring (11), and that the spring end (19) is shaped such that it is fixed or supported in the active position by a frictional or supporting form fit on a corresponding shaping (16) and/or that the restoring spring (11) extends partially in the overlap region (U) between the upper tool halves (2, 3) and the lower tool halves (2, 3).

Description

Hand tool

Technical Field

The invention relates firstly to a hand tool, in particular a hand tool in the form of a pair of pliers, scissors or the like, having two tool halves which are arranged crosswise to one another in a hinge region and which are connected to one another, optionally pivotably about a pivot axis, by means of a hinge pin, wherein the tool halves form a mouth on one side of the hinge and a handle on the other side of the hinge, wherein the tool halves extend in the region of the hinge in a superposed region on one another, and wherein a return spring which acts in a plane tensioned by the handle-side leg of the tool halves and supports an opening movement is arranged on the handle side of the tool halves between the legs of the tool halves, said return spring having spring arms with spring ends, wherein the return spring extends partially in the superposed region between the upper tool half and the lower tool half, and the axis of oscillation is outside the contour of the return spring.

The invention further relates to a hand tool, in particular a hand tool in the form of a pair of pliers, scissors or the like, having two tool halves which are arranged crosswise to one another in a hinge region and which are connected to one another, optionally pivotably, about a pivot axis by means of a hinge pin, wherein the tool halves form a mouth on one side of the hinge and a handle on the other side of the hinge, wherein a return spring which acts in a plane tensioned by the handle-side legs of the tool halves and supports an opening movement is arranged on the handle side of the tool halves between the legs of the tool halves, said return spring having spring arms with spring ends, and the spring ends being shaped in such a way that they are held on corresponding, adapted, shaped parts of the tool halves by means of a frictional and/or form fit.

Prior Art

Hand tools, in particular pliers, scissors or the like, are known in a variety of designs. Reference may be made in this regard, for example, to german utility model DE000020105643U 1. In order to exert the restoring force, a torsion spring or a rotary torsion spring is placed about the hinge axis, with the spring arm bearing on the handle-side leg of the tool half. The installation of the return spring is done before or during the assembly and connection process of the two tool halves. Subsequent mounting or dismounting of the spring element cannot be or is difficult to achieve without dismantling the tool halves. The manufacturer must make a decision before assembly whether to intentionally equip the return spring and retain it later in the manufacturing process.

Disclosure of Invention

Based on this prior art, the object of the invention is to further develop a hand tool, in particular a pliers, scissors or the like, in a design that is advantageous in terms of production technology.

A possible solution to the stated object is achieved according to a first invention by a hand tool, in particular a pair of pliers, scissors or the like, wherein a pocket-like recess is provided between the tool halves, in which recess a part of the return spring is located, which part can also be guided from the handle side when the tool halves are connected to one another in order to be inserted into the pocket-like recess, and the spring end is shaped in such a way that it is held on a corresponding, adapted shaped part of the tool halves by a frictional and/or form fit.

According to a further inventive concept, the object is achieved in that the return spring is held on the hand tool in the overlapping region only by means of spring arms, for which purpose the spring ends are shaped in such a way that they are held on corresponding, adapted shapes of the tool halves by frictional and/or form fit, and the spring arms merge in spring segments which are arranged on the handle side of the spring arms.

The technical problem is also solved according to another inventive idea in that the frictional and/or form-fit engagement is achieved by a support that is movable relative to the tool halves.

A hand tool constructed in this way is advantageous for the manufacturer as well as for the user. It can also be achieved by a combination of a positive and frictional connection that the spring is removed or decoupled from the at least one leg partially or completely afterwards against the spring force, in order to bring the spring into a failure position (Au β erwrkstellung) as a result. This also makes it possible for the user to add the restoring spring later. It is possible for the manufacturer to equip the hand tool with a return spring in a later manufacturing state, in particular after the tool halves have been connected to one another. There is no need for double inventory and product breakdown throughout.

But also to be able to subsequently install a return spring with a changed characteristic curve in a simple manner according to the user's requirements.

The partial arrangement of the return spring in the overlapping region between the two tool halves, which is provided if necessary, is considered to be advantageous for operation. In this way, the spring is arranged at least partially in the concealed position, so that it does not act or acts without interference in the open pivoting region between the tool halves, in particular between the handles. Known springs extend open, uncovered by the tool halves, between the tool halves, in particular between the handles, which can be hooked in the work environment with a projection or the like in adverse circumstances. This can lead to uncontrolled ejection of the spring. But also the operational technical disadvantages are eliminated by the chosen arrangement.

In this embodiment, the spring ends can act on the respective tool halves in a purely frictional engagement. For example, in the case of a corresponding profile on one or both tool halves, the effect of the positive fit can also be achieved accordingly, for example by a corresponding positive fit design of the respective spring end and/or of the region of the tool half that interacts with the spring end.

The pocket-like recess can be formed by a recess provided in the region of one tool half in the overlapping region and oriented in the direction of extent of the pivot axis, and optionally also by opposing recesses in the two tool halves in the overlapping region.

The mounting of the restoring spring can be carried out from the handle side with the tool halves connected to one another in that the restoring spring is introduced into the pocket-like recess in the direction of the pivot axis, in particular when the hand tool is in the open position. The possible form-fitting retention can be automatically formed during the insertion process.

The spring arms meet in a spring section, which may form a lug (Auge) of the restoring spring. Such a lug may be formed by a coil. The spring arm can extend from the preferably central spring section in the direction of the end of the handle facing away from the pivot axis or in the opposite direction.

For the frictional and/or form-fitting fixing or supporting of the at least one spring arm, preferably separate bearings can be provided. The preferred mobility of the bearing relative to the associated tool half makes it possible to move the bearing from the operating position with the spring into the inoperative position and/or vice versa, wherein the inoperative position can also be achieved by removing the bearing from the tool half.

In one possible position of failure, the associated spring arm lacks support. Accordingly, the spring is disabled when the hand tool is operated. But also in this position the assembly and/or disassembly of the spring can be effected.

In a possible embodiment, the spring force can be adjusted by means of a movable bearing part in that the associated spring arm is supported more or less tensioned depending on the position of the bearing part.

It is also possible to provide a movable support on only one tool half. If a movable bearing is provided on both tool halves, the bearing can be designed identically, in particular with regard to its manner of movability, but can also be designed differently.

The features of the independent claims mentioned above can be significant both in themselves and in combination with one another, and furthermore features of one independent claim can be combined with features of another independent claim or of a plurality of other independent claims and also with individual features of one or more other independent claims.

Further features of the invention, which are generally stated in the description of the figures in the manner of preferred configurations of the above-mentioned claim variants, can also be significant in the form of a configuration of one or more features of the claim variants, either individually or in other overall variants.

In a further embodiment, the holding region of the spring arm overlaps the other tool half, at least when the hand tool is closed, as viewed in the direction of the pivot axis. The holding region of the spring arm is thus in the protective position in the overlapping region at least over part of the pivoting path of one or both tool halves.

In a preferred embodiment, the holding regions of the two spring arms (also) overlap the respective other tool half, viewed in the direction of the pivot axis in the maximally expanded state of the hand tool.

In one possible embodiment, the spring section is arranged on the handle side of the spring arms, in which the spring arms meet, so that a return spring arrangement is obtained, wherein the two spring ends preferably extend in the overlapping region in each pivoting position of the tool halves relative to each other.

Furthermore, it is possible for the spring section forming the lifting lug to extend in the overlapping region in at least one pivoting position of the tool halves, in terms of a projection in the direction of extension of the pivot axis in the case of complete or only partial overlap of one or both tool halves.

The two spring ends of the restoring spring can completely or partially surround the tool halves for cooperation with corresponding, adapted formations on the handle-side leg of the respective tool half. In this way, it is possible in a design manner to provide for a surrounding of the tool half on at least two sides in the region of the corresponding profile, as viewed perpendicular to the longitudinal extent of the tool half, for example in a substantially rectangular cross section of the tool half. It is also possible to form an enclosure around three or all sides of the cross section of the tool half.

The adapted corresponding profiling of the tool halves can be formed by a groove or rib accommodating the spring end, against which groove or rib the spring end abuts. In one embodiment, the adapted counter-profiling is formed by a stepped continuous cross-sectional widening of the tool half.

The interaction of the spring end with the tool half can preferably be formed in the region of the tool half on the handle side, as viewed from the pivot axis.

Furthermore, the return spring may be retained only by its own spring force. In this embodiment, preferably no further means for retaining the spring, for example grooves or ribs for clip retention or journals or the like to be wrapped, are provided in the region of the tool halves. This generally enables an advantageous assembly and disassembly of the spring.

In this way, the restoring spring can be decoupled from the at least one leg only by a displacement in the plane tensioned by the handle-side leg of the tool half in the direction of the handle side against its restoring force, and can thus be transferred into the inoperative position.

In one embodiment, the restoring spring can have an Ω -like shape in plan view, with 1 number of turns (turns) being provided in the spring section in which the spring arms meet. The restoring spring may preferably have a central arc from which spring arms for bearing on the legs of the tool halves are each connected at the end. The arc segment can also extend over an angle of greater than 180 °, up to 270 ° or 300 °, in this case with reference to a plan view. The arc segments of the omega shape may also extend over an angle of not more than 120 °, 180 ° or even 210 °.

In an alternative embodiment, it is provided that the restoring spring has an Ω -like shape with at least 1 turn. This preferably forms a central region in plan view, which is formed by a circular coil. The circular arc formed here extends over 360 °, for example over 540 °, i.e. 1.5 coils, or over an angle of between 360 ° and 720 °, for example 450 °.

The return spring can be arranged in a pocket-like recess in the handle-side part of the leg. The recess may be provided in the vicinity of the hinge in the overlapping region of the tool halves. The recess can also be selected such that the spring arm supported on the leg of the tool half can also be moved into the overlapping position, so that in one possible embodiment the entire restoring spring can be arranged in the concealed position in a plan view of the tool, in which the pivot axis is shown as a point.

The distance of the corresponding profile on the leg from the hinge axis to the adapted profile of the spring end is greater than the distance of the lifting eye of the return spring, which lifting eye is formed by a closed or sometimes non-closed loop, from the hinge axis. The spring end is directed in this embodiment toward the free end of the leg of the tool half, and the lug of the restoring spring is directed toward the joint axis.

The opposite arrangement is also possible. In this way, the distance of the corresponding profile on the leg and the adapted profile of the spring end relative to the joint axis is smaller than the distance of the lug of the return spring relative to the joint axis, so that the free end of the spring leg is correspondingly directed toward the joint axis.

It can also be provided that a raised area is formed on the tool half on the handle side of the overlapping area, said raised area having a surface extending in the longitudinal direction of the tool half, said surface being assigned to a spring section extending in the area of the tool half. In a preferred embodiment, the surface extends substantially vertically, at least transversely to the plane spanned by the shank-side legs of the tool halves, and more preferably transversely to the longitudinal extent of the associated spring arms. The surface of the raised area provides support for the spring section in the pivoting direction in one possible embodiment. This may be a bearing in the direction of the spring action, alternatively a bearing against the direction of the spring force.

The raised region can be embodied in a uniform and integral manner with the material of the handle region of the tool half, further preferably in the region of the pocket-like profile.

In a refinement, the raised region together with the further raised region opposite the surface can form a groove extending along the extension of the tool half, in which groove a section of the spring arm engages. The spring arms are in this embodiment not only held between the raised regions in the spring direction but also in the direction of the counter spring force. The distance between the mutually facing surfaces of the two raised areas, and thus the respective groove walls, can be selected such that the section of the spring arm that is engaged in this case can perform a defined displacement in the direction of pivoting of the spring arm, if necessary.

Furthermore, the section of the spring arm may have a curvature in the direction of the free end of the tool half facing away from the pivot axis, said curvature extending around the associated end region of the projection region. Such a bend may enclose an obtuse angle with the spring arm of more than 90 °, for example not more than 120 ° or 150 °, in a plan view in which the pivot axis is shown as a point. Alternatively, an acute angle of less than 90 °, for example 80 ° or 60 °, is also possible.

In a development, the bend in the assigned position can also continue around the handle region of the tool half as far as the surface of the tool half opposite the pocket recess, around the end of the raised region facing away from the pivot axis. In the end region of the spring arm, a generally U-shaped bent region can be provided, which is supported on the respective surface of the tool half, optionally on one side, on the bottom of the pocket-like recess, with its U-shaped connecting sections spaced apart from one another, which are connected by a U-shaped leg extending in the direction of extension of the pivot axis. The U-shaped arm can be supported on the end face of the tool half.

In addition, only an upper or lower recess can be formed on the tool halves outside the overlapping region, said recess being accessible from the opposite tool half, in which recess the spring end engages in a freely protruding manner. The outwardly extending spring arms are supported on the walls of the tool halves which delimit the recess. In the deflected spring ends, corresponding bearings can also be formed on the mutually angled limiting surfaces of the recesses.

The support can be a sleeve part which can be inserted onto the tool half and can preferably be removed without tools. In the inserted position, the insert part provides the spring arm with a support in the prestressed position, if necessary. The position of the sleeve part can be fixed for the positional fixing of the sleeve part when the spring arm is loaded, for example by latching. It is also possible to achieve a tool-free fastening, for example a screw fastening.

Furthermore, the support can also be a part which is slidably or pivotably articulated on the tool half and which, for cooperation with the spring arm, can be moved or pivoted from the inoperative position into the operative position. Preferably, the action position can also be fixed.

Furthermore, the support can also be an insert, in particular having an insertion direction transverse to the extension direction of the tool halves. The preferred fixing of the active position can be achieved by means of spring arms, alternatively also by co-action in the form of a latch or catch with the tool half.

The ranges and value ranges or multiples ranges indicated above and below also encompass, in the context of the disclosure, all intermediate values, in particular at a spacing of one tenth of each dimension, where possible also without scale. For example, a value of not greater than 120 ° given also includes disclosure of not greater than 119.9 °, not greater than 103.5 °, etc., and disclosure between 360 ° and 720 ° also includes disclosure between 360.1 ° and 720 °, 360 ° and 719.9 °, 360.1 ° and 719.9 °, 398.7 ° and 688.3 °, etc. The disclosure is used in one aspect to define the lower and/or upper boundaries of the stated ranges, but alternatively or additionally to the disclosure of one or more individual values for each range.

Drawings

The invention is further elucidated below by means of the accompanying drawings, which only show embodiments. Features which are described in only one of the embodiments and which are replaced by further features in further embodiments for the sake of specificity, are thus described as the most feasible features for further embodiments. In the drawings:

figure 1 shows a perspective view of a first embodiment of forceps;

FIG. 2 shows a partial cross-sectional view of a forceps;

fig. 3 shows a view according to fig. 2 in relation to another embodiment;

fig. 4 shows a view according to fig. 1 relating to a second embodiment;

fig. 5 shows a view corresponding to fig. 2 in relation to the embodiment according to fig. 4;

FIG. 5a shows a cross-sectional view taken along section lines Va-Va in FIG. 5;

FIG. 6 illustrates a perspective view of a return spring in one embodiment;

FIG. 7 shows a return spring in another embodiment;

FIG. 8 illustrates another embodiment of a return spring;

FIG. 9 shows an enlarged cross-sectional view of the region of the tool half containing the spring end in relation to another embodiment;

FIG. 10 shows a cross-sectional view taken along section line X-X of FIG. 9;

fig. 11 shows a view corresponding to fig. 9 in relation to a further embodiment;

FIG. 12 shows a cross-sectional view taken along section line XII-XII of FIG. 11;

FIG. 13 illustrates another embodiment of a hand tool;

FIG. 14 shows a view corresponding to FIG. 9, in relation to another embodiment, with a support configured as a plug-in kit;

FIG. 15 shows a cross-sectional view taken along section line XV-XV of FIG. 14;

FIG. 16 shows a side view of the plug set;

fig. 17 shows a side view of a plug member relating to another embodiment;

FIG. 18 shows a cross-sectional view of a tool half having an insertion set configured as a slider;

FIG. 19 shows a cross-sectional view taken along section line XIX-XIX in FIG. 18;

fig. 20 shows a side view of the plug set according to fig. 18;

FIG. 21 shows a view corresponding to FIG. 18 involving an embodiment in which the support is configured as an oscillating member;

FIG. 22 shows a perspective detail view of the pendulum;

FIG. 23 shows a view corresponding to FIG. 18, relating to a design in which the support is configured as an insert;

fig. 24 shows a cross-sectional view taken along section lines XXIV-XXIV in fig. 23;

fig. 25 shows a perspective view of the insert.

Detailed Description

First, a hand-held tool 1 in the form of a pair of pliers, here beveled pliers, is shown and described with reference to fig. 1. The hand tool 1 has two

tool halves

2 and 3, which intersect in a hinge pin 4 having an axis of rotation x.

Starting from a hinge bolt 4, which holds the tool halves 2 and 3 together so as to be pivotable about a geometric axis of rotation x, the tool halves 2 and 3

form legs

5 and 6 on one side of the hinge bolt 4 and

jaws

7 and 8 on the other side.

The

legs

5 and 6 are configured as handles.

Around the hinge pin 4, the overlapping region U of the sections of the tool halves 2 and 3 lying one above the other is formed.

In the sections of the tool halves 2 and 3 facing the

legs

5 and 6, pocket-

like recesses

9, 10 are provided in the overlapping region U. The recesses extend in the overlap region U starting from the bearing planes of the tool halves 2 and 3, which extend perpendicularly to the axis of rotation x in the thickness direction of the tool halves 2 and 3, viewed in the direction of extension of the axis of rotation x. This makes it possible for the recess to extend in the overlap region U at approximately half the thickness dimension of the tool halves 2, 3.

The pocket-

like recesses

9, 10 can be bounded from the outside, viewed in the pivoting direction of the tool halves 2, 3, by a raised region 17. In the embodiment of fig. 1 to 5, the

recesses

9, 10 are freely extended, viewed inwardly in the direction of oscillation.

The

pockets

9, 10 can be bounded in the direction of the end of each

tool half

2, 3 remote from the pivot axis x by a shoulder 18 extending transversely to the longitudinal extension of the

tool half

2, 3.

At least in the initial tool position, i.e. in the closed jaw position of the forceps, the

recesses

9, 10 arranged substantially one above the other receive a return spring 11. A wire spring can be mentioned here, which has a substantially Ω -like shape.

The return spring 11 has a central spring section 12, preferably in the form of a boss. The central spring section can be formed according to the illustration in fig. 7 by an arc-shaped region which is not closed in the circumferential direction but extends over an angle of approximately 200 ° to 210 ° (see fig. 8).

The spring arms 13 are bent outwards starting from the ends of the arc segments.

The spring section 12 according to the illustration in fig. 6 can also be formed by a looped coil of spring wire, for example by a coil wound through approximately 270 °. The spring arm 13 extends from the coil end in an outward direction.

On the end side of the spring arm 13 of the embodiment according to the views in fig. 6 and 8 (see also the views of the arrangements in fig. 1 to 3), the spring arm 13 can also form a wraparound section 14. The wrap section is essentially formed by two spring wire sections extending parallel to one another and spaced apart from one another, which are connected to one another by a transversely extending spring section.

The surrounding sections 14 of the two spring arms 13 are formed facing away from each other.

In the region of the recesses 9 of the tool halves 2 and 3, the restoring spring 11 can be held on the tool 1 solely by its restoring force. In this case, a part of the return spring 11, in the two first embodiments mainly the spring section 12, extends in the overlap region U. The arrangement is furthermore selected such that the restoring spring 11 extends substantially in the plane of separation of the two

tool halves

2 and 3.

By means of the wrapping section 14, the

respective leg

5, 6 of the tool halves 2, 3 is enclosed on three sides in the region of the

recess

9 or 10. The spring end 19 can engage in a groove 20 which extends transversely to the longitudinal extension of the tool halves 2, 3 and is formed in the flat side of the tool halves opposite the pocket-

like recesses

9, 10.

The restoring springs 11 arranged in this way can also be supported in a point-like manner within the

pockets

9 and 10, for example in the surrounding section 14 on mutually opposite edges of the

pockets

9, 10 and possibly also in the region of the spring section 12 on mutually opposite edges of the

pockets

9, 10.

The region of the

pockets

9, 10 accommodating the return spring 11 is formed on the leg side outside the hinge bolt with respect to the hinge bolt 4.

According to the above-described configuration and arrangement of the return spring 11, the contour of the return spring extends in the underside of the hand tool 1 outside the hinge bolt 4, preferably offset relative to the hinge bolt 4 in the direction of the shank-side leg 5, 6 (see fig. 2 or 3), the axis of rotation x being shown as a point in plan view.

A shoulder 18 bounding the

recesses

9, 10 on the handle side is formed as a counter-formation 16 adapted to the spring end 19, preferably the wraparound section 14 of the restoring spring 11 also resting against said shoulder 18.

The restoring spring 11 can be installed afterwards after the hand tool 1 has been produced in that it is pushed into the pocket-

like recesses

9, 10 from the handle side of the hand tool 1.

The inoperative position relative to the

legs

5, 6 can also be achieved by a displacement of the spring arm 13 in a plane tensioned by the

legs

5 and 6 of the spring arm 13 against a restoring force. If both spring arms 13 are in such a position of failure, the return spring 11 can be removed.

In the above-described embodiment, the corresponding profile 16 on the

legs

5 and 6 and the adapted wrap section 14 or spring end 19 of the spring arm 13 are at a greater distance from the axis of rotation x than the omega-shaped spring section 12 of the return spring 11.

But the reverse arrangement is also possible in this regard (see fig. 4 and 5).

In this embodiment, a torsion spring is provided as the return spring 11, with a central spring section 12 having a coil of approximately 540 ° spring wire.

The spring arm 13 extending from there has on the end side a spring end 19 which extends substantially in the direction of extension of the axis of rotation x in the mounted state and is designed as an undercut section 15.

The restoring spring 11 (see also the detail of fig. 7) designed in this way is held in the region of the

recesses

9 and 10 by means of the undercut section 15, for which purpose each

tool half

2, 3 has, in the overlapping region U inside the

recesses

9, 10, a strip-like counter-formation 16 extending from the bottom of the recess 9 in the direction of the separating plane. Each counter-formation 16 is surrounded by an undercut section 15 of the return spring 11.

The undercut section 15 can have a curved spring end 19, as shown in fig. 5a, for example. The spring end preferably extends in the orientation of the pivot axis x. The free end faces of the spring ends make it possible to support the respective spring arms 13 on the bottom of the mutually

opposite recesses

9, 10.

In this embodiment, the restoring spring 11 is arranged locally, but here in the region of the spring section 12 that is further away from the axis of rotation x than the spring end 19, in the overlap region U.

The counter-shaped portion 16 can be overtravel-locked by the spring end 19, so that the hand tool 1 can be subsequently provided with a spring by insertion according to fig. 7.

Fig. 9 and 10 show the leg 5 of the tool half 2 in the region of the pocket recess 9.

The further raised regions 21, which are arranged outwardly in the pivoting direction and are configured here, are provided for the raised regions 17, which are arranged inwardly, viewed in the pivoting direction. The raised region 21 is formed at a distance from the opposing shoulder 18, as viewed in the longitudinal extension of the tool half 2.

Between the raised

regions

17 and 21, a groove 22 is formed which extends substantially in the longitudinal extension of the tool half 2 and in which the spring arm 13 associated with the tool half 2 engages.

The bend 23 of the spring arm 13, which finally transitions into the wrapping section 14, extends in the region of the groove formed between the raised region 21 and the shoulder 18. The spring arm 13 is correspondingly guided around an end region 24 of the projection region 21 associated with the end of the tool half 2 facing away from the pivot axis x.

The spring arm 13 is held in the groove 22 by this design, in particular to further prevent an unintentional detachment of the restoring spring 11.

Preferably, the other tool halves 3 are of identical design in the region of their recesses 10. The raised

areas

17 and 21 are adjusted in terms of their height, as viewed in the direction of extension of the pivot axis x, in order to achieve pivoting of the

legs

5, 6 in the stacked position.

In order to mount the return spring 11 advantageously, the inner projection region 21, as also described, viewed in the pivoting direction, is provided on the surface side with a bevel 25 which descends from the corresponding groove 22 of the

leg

5, 6 to the inner edge. The ramp enables the spring arm 13 to be pressed into the groove 22 against the restoring force.

Pocket-

like recesses

9, 10 can be formed in the overlap region U on the tool halves 2, 3 in the form of an upper or lower recess as shown in fig. 11 and 12, which has an outer boundary formed in the pivoting direction by a raised region 17 and a boundary formed in the extension direction of the tool halves 2, 3 by a shoulder 18.

The associated spring arm 13 of the restoring spring 11 in this embodiment is supported at the bottom of the recess, optionally outwardly, i.e. in the spring action direction, on the opposite support surface of the raised region 17, and optionally via a curved spring end 19 on the opposite end face of the shoulder 18. Spring end 19 is freely and outwardly engaged in a recess or pocket-like recess. In this embodiment, a U-shaped wrapping of the tool halves 2, 3 is preferably not formed.

The illustration according to fig. 13 also makes it possible to obtain an arrangement and a configuration which, when the hand tool 1 is in the form of a pliers, are primarily in accordance with the first embodiment shown in fig. 1 and 2, wherein, however, the geometric pivot axis x does not coincide with the body axis of the hinge bolt. In contrast, in this hand tool 1, two hinge pins 4 are provided in the overlapping region U, which are guided in slotted hinge journals.

In this embodiment, too, the tool halves 2, 3 have pocket-

like recesses

9, 10 in the overlapping region U, in which the return spring 11 is received and held.

The return spring 11 also extends here on the leg side relative to the hinge bolt 4 and the pivot axis x outside the hinge bolt 4, in which case the central, omega-shaped spring section 12 is partially or even completely covered by sections of the tool halves 2, 3 in the overlap region U.

Fig. 14 to 25 show further embodiments in which, for supporting and, if appropriate, securing the associated spring arm 13 of the restoring spring 11, a separate bearing 26 is provided at least on the tool halves 2 and/or 3, which bearing is movable relative to the tool halves 2, 3.

In this way, the support 26 can be a sleeve 27 which can be arranged on the leg of the tool halves 2, 3 (see fig. 14 to 17). The plug-in part 27 may be U-shaped in cross section, with U-shaped legs which, in the plug-in position, rest against the associated broad side of the tool half legs. The U-shaped connecting edge covers a section of the leg facing the narrow side of the other tool half. The support 26 can thus be inserted from the inside onto the tool halves 2, 3.

It is also possible to form a removable fastening of the support 26 to the tool halves 2, 3 without tools, for example a latching fastening as shown, for which purpose, for example, the U-shaped leg of the plug-in part 27 engages with a latching projection in a latching recess of the tool halves 2, 3.

The U-shaped legs, which are preferably not used for the latching fastening, are designed to support the associated spring arms 13. In this way, the plug-in part 27 can have a slot 28 in the leg of the U which opens towards the U-shaped opening, the spring arm 13 being fitted captive in said slot 28 (see fig. 14 and 15).

The groove can also be open towards the free end of the U-shaped leg, wherein the spring arm 13 is then trapped between the groove wall and the raised area 21 of the tool halves 2, 3 (see fig. 17).

The spring 11 can be held on at least one

tool half

2, 3 of the tool 1 by means of a support 26 that can be inserted. The

other tool half

2, 3 can have, for example, a pocket-like recess 36 for accommodating the other spring arm. Also, as an alternative, the other tool half may also have a separate support 26.

The support 26 can be moved into a deactivated position, for example by complete removal from the tool halves 2, 3, in order to release the associated spring arm 13 from the respective support and accordingly to operate the hand tool 1 without spring force.

This can also be achieved by means of a support 26 which is movable on the tool halves 2, 3. In this case, fig. 18 to 20 may relate to a part 29 that is slidable in the longitudinal extension of the tool halves 2, 3 or to a part 30 that is pivotable about a rotational axis oriented perpendicular to the broad sides of the tool halves 2, 3 (see fig. 21 and 22).

The slidable part 29 can be arranged movably along the outer broad side of the tool halves 2, 3. In the preferred U-shaped cross-sectional configuration, the U-shaped legs can be used for guidance in such a way that, for example, the ribs of the tool halves 2, 3 engage in correspondingly configured and correspondingly oriented guide grooves of the U-shaped legs (see fig. 19). The free end face of the other U-shaped leg can preferably provide a bearing surface for the spring arm 13.

The slidable part 29 can be moved from a deactivated position to an activated position and vice versa, wherein in particular the activated position is preferably fixed (for example by latching).

The fixed, for example latched, operating position can also be formed in the pivotable part 30. The pivotable component can be moved from the inoperative position into the operative position and vice versa, wherein the movement is effected by a pivoting movement.

The fastening (e.g., snap fastening) is selected such that it cannot be released by the force of the return spring 11 acting on the support 26.

Furthermore, the support 26 can also be an insert 31, for example in the form of a pin, which is inserted into the associated

tool half

2, 3 for supporting the spring arm 13. Exemplary solutions are shown in fig. 23 to 25.

The pin-shaped insert 31 may have a cylindrical section 32 which extends through the region of a bore 33 on the tool halves 2, 3, which bore has a bore axis which is oriented perpendicularly to the broad sides of the tool halves 2, 3. The end of the cylindrical section 32 transitions into a relatively enlarged diameter head section 34. The end section of the cylindrical section 32 facing away from the head section 34 and capable of assuming a projecting position with respect to the facing-away broad side of the tool halves 2, 3 is provided with a secant-like directed groove 28 for captively receiving the spring arm 13.

Between the head section 34 and the opposite broad side, a pressure spring 35 can be provided, which clamps the spring arm 13 engaged in the groove 28 by means of the cylindrical section 32 against the associated broad side of the tool halves 2, 3. At the same time, the insert 31 is thereby also fixed to the tool halves 2, 3.

The deactivation is effected by the pin-shaped insert 31 being displaced along the cylinder axis against the restoring force of the compression spring 35 (for example by pressing on the head portion 34) such that the spring arm 13 is in a position in which it can be pulled out of the groove 28.

Separate bearings 26 may also be provided on the two

tool halves

2, 3, for example the same bearings 26 may be provided on both

tool halves

2, 3, or alternatively differently acting bearings 26 may also be provided. Furthermore, a support 26 in the form of a sleeve 27 can be provided or arranged on one of the tool halves 2 or 3, and a movable or

pivotable component

29, 30 or an insert 31 can be provided or arranged on the

other tool half

3, 2.

Furthermore, such a support 26 can also be used for supporting spring arms 13 of differently designed restoring springs 11, in particular of the kind described in connection with fig. 6 to 8.

The arrangement of the support 26 makes it possible to secure the return spring 11 on the hand tool 1 and, if necessary, to deactivate the return spring 11 independently and temporarily.

In the case of a bearing 26, which is in particular designed as a slide, it is possible, for example, as shown in the illustration of fig. 8, to adjust the different pretensioning of the restoring spring 11 as a function of the sliding position of the bearing 26 by means of a corresponding design of the bearing surfaces, for example, wedge-shaped bearing surfaces.

The above-described embodiments are intended to illustrate the invention which is entirely contained in the present application, and the present invention is an inventive improvement of the prior art by at least the following technical feature combinations, respectively, namely:

a hand tool 1 is characterized in that pocket-

like recesses

9, 10 are provided between the tool halves 2, 3, in which recesses a part of the return spring 11 is located, which part can also be guided from the handle side when the tool halves 2, 3 are connected to each other for insertion into the pocket-

like recesses

9, 10, and in that the spring ends 19 are shaped in such a way that they are held on corresponding, adapted shaped parts 16 of the tool halves 2, 3 by frictional and/or form fit.

Hand tool, characterized in that the return spring 11 is held on the hand tool 1 in the overlapping region U only by means of spring arms 13, for which purpose the spring ends 19 are shaped in such a way that they are held on corresponding, adapted shapes 16 of the tool halves 2, 3 by frictional and/or form fit, and the spring arms 13 merge into a spring section 12, which is arranged on the handle side of the spring arms 13.

A hand tool 1, characterised in that the frictional and/or form fit is achieved by a support 26 which is movable relative to the tool halves.

A hand tool is characterized in that the holding area of the spring arm 13 overlaps the

other tool half

2, 3, at least during the closing of the hand tool 1, viewed in the direction of the pivot axis x.

A hand tool is characterized in that the holding areas of the two spring arms 13, viewed in the direction of the pivot axis x in the maximally expanded state of the hand tool 1, overlap the respective other tool half.

Hand tool, characterized in that the two spring ends of the restoring spring 11 are completely or partially surrounded by the tool halves 2, 3 on the handle sides thereof, as seen from the joint, for the purpose of interacting with corresponding mating profiles 16 on the handle-

side legs

5, 6 of the

respective tool halves

2, 3.

A hand tool, characterized in that a return spring 11 is held by its own spring force.

A hand tool is characterized in that a return spring 11 is decoupled from at least one

leg

5, 6 by a displacement in the plane tensioned by the handle-

side legs

5, 6 of the tool halves 2, 3 against its return force in the direction of the handle side and is thereby converted into a deactivated position.

Hand tool, characterized in that the return spring 11 has an omega-like shape with a number of turns of 1 specified in a spring section 12, in which spring sections 12 spring arms 13 meet, and/or preferably that the return spring 11 has an omega-like shape with a number of turns of at least 1.

Hand tool, characterized in that the distance of the corresponding profile 16 on the

legs

5, 6 and the matching profile of the spring end 19 from the pivot axis x is greater than the distance of the spring section 12 of the return spring 11 from the pivot axis x, in which spring section 12 the spring arms 13 meet.

legs

5, 6 and the matching profile of the spring end 19 from the pivot axis x is smaller than the distance of the spring section 12 of the return spring 11 from the pivot axis x, in which spring section 12 the spring arms 13 meet.

A hand tool is characterized in that a raised area 21 is formed on the tool halves 2, 3 on the handle side of the overlapping area U, said raised area having a surface extending in the longitudinal direction of the tool halves 2, 3, said surface being assigned to a spring section extending in the area of the tool halves 2, 3.

Hand tool, characterized in that the raised area 21 together with the further raised area 17 opposite the surface forms a groove 22 extending along the extension of the tool halves 2, 3, in which groove a section of the spring arm 13 engages.

Hand tool, characterized in that the section of the spring arm 13 has a curvature 23 in the direction of the free end of the tool halves 2, 3 facing away from the pivot axis x, which extends around the associated end region 24 of the raised region 21.

A hand tool is characterized in that only an upper recess or a lower recess is formed on the tool halves 2, 3 outside the overlapping region U, said recesses being accessible from the

opposite tool halves

2, 3, in which recess a spring end 19 engages in a freely protruding manner.

A hand tool, characterised in that the support member 26 is a socket member 27.

A hand tool, characterized in that the support 26 is a

part

29, 30 which is slidably or swingably hinged on the tool halves 2, 3.

A hand tool, characterised in that the support 26 is an insert 31.

All features disclosed (by themselves and in combination with one another) are of inventive significance or inventive value. The disclosure of the associated/subordinate priority document (prior application) is also fully included in the disclosure of the present application, for which reason the features of this priority document are also included in the claims of the present application. The features of the dependent claims are all developments which have independent inventive significance or value for the prior art and can be filed separately on the basis of these dependent claims.

List of reference numerals

1 hand-held tool

2 tool half

3 tool half

4 hinge bolt

5 legs

6 legs

7 pliers mouth

8 pincers mouth

9 concave part

10 recess

11 return spring

12 spring section

13 spring arm

14 wrap around segment

15 undercut segment

16 corresponding to the forming part

17 raised region

18 shoulder

20 groove

21 raised region

22 groove

23 bending part

24 end region

25 inclined plane

26 support member

27 socket piece

28 groove

29 slidable part

30 parts capable of swinging and moving

31 insert

32 cylindrical section

33 holes

34 head section

35 pressure spring

36 recess

U-shaped overlapping area

x axis of oscillation

Claims

1. A hand tool (1) having two tool halves (2, 3) which are arranged crosswise to one another in a hinge region and are pivotably connected to one another about a pivot axis (x), wherein the tool halves (2, 3) form mouths (7, 8) on one side of the hinge and form handles on the other side of the hinge, wherein the tool halves (2, 3) extend in the region of the hinge in a superposed region (U) one above the other, and wherein a restoring spring (11) which acts in a plane tensioned by the handle-side legs (5, 6) of the tool halves (2, 3) and supports an opening movement is arranged between the legs (5, 6) of the tool halves (2, 3) on the handle side of the tool halves (2, 3) and has a spring arm (13) having a spring end (19), wherein the restoring spring (11) is located partially on the upper tool half (2, 2), 3) Extends in a region (U) of overlap with the lower tool half (3, 2) and the pivot axis (x) is located outside the contour of the return spring (11), characterized in that a pocket-like recess (9, 10) is provided between the tool halves (2, 3) and is formed by a recess, which is provided in the region of one tool half (2, 3) in the overlapping region (U) and is oriented in the direction of extension of the pivot axis (x), in which recess a part of the return spring (11) is located, said part can also be introduced from the handle side when the tool halves (2, 3) are connected to each other for insertion into the pocket-like recesses (9, 10), and the spring end (19) is shaped in such a way that it is held on a corresponding, adapted profile (16) of the tool halves (2, 3) by means of a frictional and/or form fit.

2. A hand tool (1) having two tool halves (2, 3) which are arranged crosswise to one another in a hinge region and are pivotably connected to one another about a pivot axis (x), wherein the tool halves (2, 3) form mouths (7, 8) on one side of the hinge and form handles on the other side of the hinge, wherein the tool halves (2, 3) extend in the region of the hinge in a superposed region (U) one above the other, and wherein a restoring spring (11) which acts in a plane tensioned by the handle-side legs (5, 6) of the tool halves (2, 3) and supports an opening movement is arranged between the legs (5, 6) of the tool halves (2, 3) on the handle side of the tool halves (2, 3) and has a spring arm (13) having a spring end (19), wherein the restoring spring (11) is located partially on the upper tool half (2, 2), 3) Extending in a region (U) of overlap with the lower tool half (3, 2) and the pivot axis (x) being outside the contour of the return spring (11), characterized in that the return spring (11) is held on the hand tool (1) in the region (U) of overlap only by means of spring arms (13), for which purpose the spring ends (19) are shaped in such a way that they are held on corresponding, adapted formations (16) of the tool halves (2, 3) by frictional and/or form-fitting engagement, and the spring arms (13) merge into spring segments (12) which are arranged on the handle side of the spring arms (13).

3. A hand tool (1) having two tool halves (2, 3) which are arranged crosswise to one another in a hinge region and are pivotably connected to one another about a pivot axis (x), wherein the tool halves (2, 3) form mouths (7, 8) on one side of the hinge and form handles on the other side of the hinge, wherein a return spring (11) which acts in a plane tensioned by the shank (5, 6) of the tool halves (2, 3) and supports an opening movement is arranged on the handle side of the tool halves (2, 3) between the legs (5, 6) of the tool halves (2, 3), said return spring having a spring arm (13) with a spring end (19), and the spring end (19) is shaped in such a way that it is held on the tool half (2) by frictional and/or form engagement, 3) Is characterized in that a pocket-like recess (9, 10) is provided between the tool halves (2, 3) by means of a recess provided in the region of one tool half (2, 3) in the overlapping region (U) and oriented in the direction of extension of the pivot axis (x), in which recess a part of the return spring (11) is located, a frictional and/or form-fit engagement being achieved by means of a support (26) that is movable relative to the tool halves.

4. Hand tool (1) according to one of claims 1 to 3, characterised in that the tool halves (2, 3) are connected to each other pivotably about a pivot axis (x) by means of a hinge pin (4).

5. Hand tool according to one of the preceding claims 1 to 3, characterised in that the holding area of the spring arm (13) overlaps the other tool half (2, 3) at least during closing of the hand tool (1) seen in the direction of the pivot axis (x).

6. Hand tool according to claim 5, characterised in that the holding areas of the two spring arms (13) overlap the respective other tool half, viewed in the direction of the pivot axis (x) in the maximally expanded state of the hand tool (1).

7. Hand tool according to one of claims 1 to 3, characterized in that the two spring ends of the restoring spring (11) are completely or partially enclosed by the tool halves (2, 3) on their handle side, viewed from the hinge, for the purpose of interacting with adapted counter-formations (16) on the handle-side legs (5, 6) of the respective tool halves (2, 3).

8. Hand tool according to any of claims 1 to 3, characterised in that the return spring (11) is held by its own spring force.

9. Hand tool according to one of claims 1 to 3, characterised in that the return spring (11) is decoupled from the at least one leg (5, 6) by a movement in the plane tensioned by the handle-side leg (5, 6) of the tool half (2, 3) against its return force in the direction of the handle side and is thereby transferred into the inoperative position.

10. Hand tool according to any of claims 1 to 3, characterized in that the return spring (11) has an omega-like shape with a number of turns of 1 specified in a spring section (12), the spring arms (13) meeting in said spring section (12).

11. Hand tool according to any of claims 1 to 3, characterised in that the return spring (11) has an omega-like shape with at least 1 number of turns.

12. Hand tool according to one of claims 1 to 3, characterised in that the distance of the corresponding profile (16) on the legs (5, 6) and the adapted profile of the spring end (19) relative to the pivot axis (x) is greater than the distance of the spring section (12) of the restoring spring (11) relative to the pivot axis (x), in which spring section (12) the spring arms (13) meet.

13. Hand tool according to one of claims 1 to 3, characterized in that the distance of the corresponding profile (16) on the legs (5, 6) and the adapted profile of the spring end (19) relative to the pivot axis (x) is smaller than the distance of the spring section (12) of the restoring spring (11) relative to the pivot axis (x), in which spring section (12) the spring arms (13) meet.

14. Hand tool according to claim 1 or 2, characterized in that a raised area (21) is formed on the tool halves (2, 3) on the handle side of the overlapping area (U), said raised area having a surface extending in the longitudinal direction of the tool halves (2, 3), said surface being assigned to a spring section extending in the area of the tool halves (2, 3).

15. Hand tool according to claim 14, characterised in that the raised area (21) together with the further raised area (17) opposite the surface forms a groove (22) extending along the extension of the tool halves (2, 3), in which groove a section of the spring arm (13) engages.

16. Hand tool according to claim 14, characterized in that the section of the spring arm (13) has a curvature (23) in the direction of the free end of the tool halves (2, 3) facing away from the pivot axis (x), which curvature extends around the associated end region (24) of the raised region (21).

17. Hand tool according to claim 1 or 2, characterised in that only an upper or lower recess is formed on the tool halves (2, 3) outside the overlapping region (U), said recess being accessible from the opposite tool half (2, 3), in which recess the spring end (19) engages freely in an overhanging manner.

18. A hand tool according to claim 3, characterised in that the support (26) is a plug-in member (27).

19. Hand tool according to claim 3, characterised in that the support (26) is a part (29, 30) which is slidably or swingably hinged on the tool half (2, 3).

20. A hand tool according to claim 3, characterised in that the support (26) is an insert (31).

21. The hand tool according to any of claims 1 to 3, wherein the hand tool is configured as a hand tool in the form of a pliers.

22. A hand tool according to any of claims 1 to 3, wherein the hand tool is configured as a scissors-type hand tool.