EP0547352A1 - Grip for hand tool, especially for knives for professional use - Google Patents

Abstract

A grip (10) for hand tools, especially for knives for professional use, is proposed, with a grip body (11) extending in the direction of the longitudinal axis (13) of the grip. This grip body (11) has a substantial cross-sectional volume and is twisted clockwise or anti-clockwise by an angle, for example roughly in the order of magnitude of between 10 DEG and 40 DEG , about the longitudinal axis (13) of the grip at least over part of its longitudinal extent. <IMAGE>

Description

The invention relates to a handle for hand tools, especially professional knives, e.g. for butchers, cooks or the like, the type mentioned in the preamble of claim 1.

In known handles of this type, the central plane of the handle body, which is approximately symmetrical with the wide surfaces of the handle, runs in alignment and extension, for example with the plane of a knife blade, over the entire longitudinal extent of the handle body. It has been shown that professional knives equipped with such a handle, even if the narrow surfaces and / or wide surfaces of the handle body are convexly curved outwards and the handle body has a substantial cross-sectional volume in one or the other handling, for example when Use as a butcher knife, which is used in the commercial sector and is used relatively often, more or less tend to slip out of hand. Furthermore, there is also a tendency for the professional knife to be rotated in the hand around the longitudinal axis of the handle despite the tight grip. The knife handle must therefore already be gripped and gripped very tightly to prevent it from slipping out and also to prevent it from rotating about the longitudinal axis of the handle. Especially when when using moments about the longitudinal axis to be transferred, the handle must be gripped and clasped particularly tight. Even then, slipping or turning is unavoidable. It also shows that greater forces for grasping and gripping the handle are at the expense of sensitive handling and guidance of the professional knife. In addition, painful pressure points and incisions in the hand clasping the handle can result with firm clasping, with accompanying rapid exhaustion or fatigue.

The invention has for its object to provide a handle of the type mentioned in the preamble of claim 1, which allows an even better power transmission from the comprehensive hand on the handle body to the hand tool, especially a knife blade, with reduced effort, in particular a good one Security against rotation of the handle body in the comprehensive hand around the handle longitudinal axis and further against slipping in the longitudinal direction is achieved.

The object is achieved according to the invention in a handle of the type mentioned in the preamble of claim 1 by the features in the characterizing part of claim 1. Further independent features of the invention result from claims 2 to 4. Further advantageous features of the invention and refinements include claims 5 to 20.

Because the handle body has a substantial cross-sectional volume and is twisted clockwise or counterclockwise over at least part of its longitudinal extent around the longitudinal axis of the handle, depending on whether the handle is designed as a right-handed handle or as a left-handed handle, the handle body follows the natural course of one comprehensive hand, without any necessary postures when clasping. The handle body nestles into the natural shape of the clasping hand full, so that the grip body is almost optimally in the hand. Because of this, very little force can be transferred from the hand via the handle body to a hand tool, for example the blade of a professional knife, with little effort. The handle body is very secure in the hand against slipping in the longitudinal direction. Due to the twisted course of the handle body, any slipping in the longitudinal direction is positively opposed by surfaces of the handle body which act as resistors. Furthermore, an even greater security against slipping of the handle body around the handle body longitudinal axis is achieved in the hand enclosing the handle body. At the same time, a tool equipped with this handle, in particular a professional knife, can be guided more reliably and safely and at the same time more sensitively. The effort is reduced. With little effort, the transfer of large forces via the handle to a hand tool, in particular the blade of a professional knife, and to the material to be cut is possible. The handle body can be designed in a pronounced rectangular outer contour or with a pronounced rectangular cross-section without the longitudinal edges otherwise present in such a cross-section painfully cutting into the hand gripping the handle body in the transition region between the narrow surfaces and the wide surfaces. In this way, the torque of the hand gripping the handle body that can be developed around the longitudinal axis of the handle can be increased even further without the need for a greater encompassing force. If, for example, a professional knife is equipped with a handle according to the invention, then in almost all manipulations of the professional knife the knife blade runs essentially in the direction of the extension of the handling arm and thus in a natural orientation.

Further details and advantages of the invention result from the following description.

The full wording of the claims is not reproduced above solely to avoid unnecessary repetition, but instead is referred to only by mentioning the claim numbers, whereby, however, all of these claim features are to be regarded as being explicitly disclosed at this point and essential to the invention. All of the features mentioned in the above and the following description, as well as the features that can only be inferred from the drawing, are further components of the invention, even if they are not particularly emphasized and are not mentioned in the claims.

Fig. 1

eine schematische Seitenansicht eines Griffes für Handwerkzeuge, insbesondere für Berufsmesser, mit einem Teil einer Klinge,

Fig. 2

eine schematische Draufsicht des Griffes in Pfeilrichtung II in Fig. 1,

Fig. 3 und 4

jeweils eine schematische Vorderansicht bzw. Rückansicht des Griffes in Pfeilrichtung III bzw. IV in Fig. 1,

Fig. 5

einen schematischen Schnitt entlang der Linie V-V in Fig. 2.

The invention is explained below with reference to an embodiment shown in the drawing. Show it:

Fig. 1

1 shows a schematic side view of a handle for hand tools, in particular for professional knives, with part of a blade,

Fig. 2

2 shows a schematic top view of the handle in the direction of arrow II in FIG. 1,

3 and 4

a schematic front view and rear view of the handle in the direction of arrow III and IV in Fig. 1,

Fig. 5

2 shows a schematic section along the line VV in FIG. 2.

In the drawing, a handle 10 for hand tools is shown schematically, which is designed in particular for professional knives, for example knives for butchers, cooks or the like. In the embodiment shown, such a professional knife is shown schematically, especially for butchers. The handle 10 is formed from a handle body 11 which extends in the direction of the longitudinal axis 13 of the handle. A blade 12 is fastened to the handle body 11. The handle body 11 is, for example Made of a physiologically harmless plastic material and can have a non-slip, non-slip surface. The handle body can consist of a one-piece injection molded part and thus of solid material. The handle of the blade 12, which is not visible here, can be encapsulated by the material of the handle body 11.

In another embodiment, not shown, the handle body 11 advantageously consists of at least two handle shells from which it is composed. In this case, too, plastic can be used as the material. Instead, a hard-wearing precious wood or another suitable material is also possible.

The handle body 11 is on the hand tool, e.g. on the blade 12 shown, injection molded or instead fixed in a non-positive and / or positive manner. In another embodiment, not shown, the handle body 11 is instead of the blade 12 shown on another hand tool, e.g. a file or the like.

The handle body 11 has a substantial cross-sectional volume and is twisted at least over part of its longitudinal extent around the schematically indicated longitudinal axis 13 around the handle counterclockwise, as shown in the drawings, or instead clockwise by the angle α. In particular, the handle body 11 described above is twisted counterclockwise with its rear end 14 relative to its front end 15 about the handle longitudinal axis 13, as shown, or instead clockwise by the angle α.

As can be seen in particular from FIGS. 3 to 5, the grip body 11, which has a substantial cross-sectional volume, has an at least substantially rectangular outer contour, the two narrow surfaces 16 and 17 of which are narrow above and below and their two broad surfaces 18 and 19 run on both sides. The rear end 14 is twisted counterclockwise with respect to the front end 15 about the handle longitudinal axis 13, as shown, or instead clockwise by the angle α. If above and below a torsion by the angle α in the counterclockwise direction about the handle longitudinal axis 13 is mentioned, then this direction of rotation is based on a view in the direction of arrow IV in FIG. 1, that is to say a view of the rear end 14 in the handle longitudinal direction . It is understood that when viewed in the opposite direction in the direction of arrow III in Fig. 1, the handle body 11 is twisted clockwise around the handle longitudinal axis 13 by the angle α. In this view, the handle body 11 can alternatively be twisted in a counterclockwise direction in a corresponding manner in an embodiment not shown.

As the section in FIG. 5 in particular shows, the grip body 11 has an at least substantially rectangular cross section. In view of the fact that the handle body 11 is a substantially linear part, the handle body 11 thus has approximately the shape of a linear rectangular torsion bar, as it e.g. from mechanical calculation examples.

The ratio of the width of the wide surfaces 18, 19 to the width of the narrow surfaces 16, 17 of the handle body 11 is approximately 2 to 1. Each broad surface 18, 19 has a width of approximately 25 mm to 35 mm. The width of each broad area 18, 19 is preferably approximately between 27 mm and 31 mm. Each narrow surface 16, 17 has a width that is approximately between 10 mm and 20 mm. The width of each narrow surface 16, 17 is preferably approximately between 14 mm and 16 mm.

The central plane 20, which is approximately symmetrical to the broad areas 18, 19 and is shown schematically, extends in the region of the front end 15 of the handle body 11 approximately in an extension of the plane within which the blade 12 of a knife or another hand tool, not shown, extends. In the area of this front end 15, the central plane 20 and the plane of the blade 12 coincide.

On the other hand, the same central plane 20, which runs approximately symmetrically with respect to the broad surfaces 18, 19, runs in the region of the rear end 14 of the handle body 11 at an angle α, that is to say at the aforementioned torsion angle, with respect to the plane within which the blade is located 12 extends.

The torsion angle α is approximately in the order of magnitude between 10 ° and 40 °, it preferably being e.g. can be about 30 °.

The longitudinal edges resulting in the transition area of the narrow areas 16, 17 into the wide areas 18, 19 are slightly rounded. The wide outer surfaces 18, 19 are at least slightly bulged outwards. In the same way, the two narrow surfaces 16 and 17 are at least slightly bulged outwards. The convex curvature of the wide surfaces 18, 19 and the narrow surfaces 16, 17 is chosen so that essentially the pronounced rectangular outer contour and the pronounced rectangular cross section of the large-volume handle body 11 are retained.

The handle body 11 has in the region of its front end 15 a protrusion 21 which protrudes at least downwards beyond the lower narrow surface 17 and is approximately hook-shaped in side view, or the like, as finger protection. serves.

In the illustrated embodiment of the handle 10, the handle body 11 is twisted in the direction of arrow IV in Fig. 1 about the longitudinal axis 13 of the handle counterclockwise by the angle α and designed in this design as a right-handed grip.

In the form of a left-handed grip, which is not shown, the grip body 11 is instead twisted clockwise by the torsion angle α when viewed in the same way.

Due to the substantially rectangular outer contour and the substantially rectangular cross section of the handle body 11 it is achieved that the handle 11 can be gripped by hand, a good frictional connection can be achieved without the rounded longitudinal edges between the narrow surfaces 16, 17 and However, cut wide areas 18, 19 painfully into the hand holding the handle 10. The torsion of the handle body 11 by the angle α contributes very decisively to this.

If, for example, a professional knife equipped with the handle 10 described, for example a knife for a butcher, is handled in a cutting position, in which the handle body 11 is gripped by the right hand in such a way that the fingers essentially on the left wide surface 18 in FIGS. 4 and 5 lie and the right wide surface 19 is approximately in the area of the palm, the handle 10 and thus the entire professional knife is reliably grasped and held and guided safely. The grip body 11 follows with the wide surfaces 18, 19 and, due to the described torsion, the natural grip position of the right hand, which comprises the grip body 11. This enables sensitive, non-slip and, above all, twist-proof guidance and handling of the professional knife. Above all, the transfer is great with little effort Forces possible via the handle 10 on the blade 12 and on the material to be cut. The force required for holding and using the professional knife is passed on from the human hand to the handle 10 and to the blade 12 in an ergonomically favorable manner due to the described design of the handle body 11. When the handle body 11 is encompassed, large moments about the handle longitudinal axis 13 can be transmitted with little or no fatigue. Thus, with relatively little effort, practically the full force can be transferred to the blade via the handle 10, and this with all possible manipulations of the professional knife, in particular, for example, when cutting, even if 13 moments have to be transmitted in the direction around the longitudinal axis of the handle. When handling the professional knife in the cutting position described, the handle 10 fits snugly and conclusively and thus positively into the natural hand position, with the blade 12 being practically oriented in extension of the arm, for example, and in this way the transmission of large forces from the arm and the Hand over the handle 10 on the blade 12 and the material to be cut is possible. The same or comparable advantages also result if the professional knife is gripped by the right hand of the user, for example in the grip position. Here, the thumb of the right hand finds support and support in the area of the left broad surface 18 in FIGS. 4 and 5, while the index finger is supported and supported on the other wide outer surface 19. Thus, the knife can be reliably gripped and held and guided reliably even in the grip position, here too, the transfer of large forces is possible with only a small amount of force.

The handle 10 also offers great advantages if the professional knife equipped with it is handled in the so-called boning position as it occurs with the butcher. This is essentially the Reverse grip position, in which the fingers essentially grip around the upper narrow surface 16 and the grip body 11 is supported approximately in the region of the lower narrow surface 17 in the palm area. Even then, the hand finds a good, coherent contact and support on the handle body 11. In all, the twist by the torsion angle α ensures that the handle body 11 essentially fits snugly and positively into the natural embrace of the right hand with every grip position. so that a sensitive, non-slip guidance of the professional knife and the transmission of large forces is achieved with little or no fatigue, the handle body 11 being extraordinarily good and secure, in particular non-rotatable, in the hand without causing painful pressure points.

Claims (20)

Handle for hand tools, in particular for professional knives, for example for butchers, cooks, or the like, with a handle body (11) extending in the direction of the handle longitudinal axis (13),
characterized,
that the handle body (11) has a substantial cross-sectional volume and is twisted clockwise or counterclockwise over at least part of its longitudinal extent around the handle longitudinal axis (13). Handle for hand tools, in particular for professional knives, eg for butchers, cooks or the like, with a handle body (11) extending in the direction of the handle longitudinal axis (13),
characterized,
that the handle body (11) has a substantial cross-sectional volume and is twisted with its rear end (14) relative to your front end (15) around the longitudinal axis of the handle (13) clockwise or counterclockwise. Handle for hand tools, in particular for professional knives, eg for butchers, cooks or the like, with a handle body (11) extending in the direction of the handle longitudinal axis (13),
characterized,
that the handle body (11) has a substantial cross-sectional volume and an at least substantially rectangular outer contour, the narrow surfaces (16, 17) of which extend above and below and the wide surfaces (18, 19) of which are on both sides, and that the rear end (14) with respect to the front end (15) of the handle body (11) is twisted clockwise or counterclockwise about the longitudinal axis of the handle (13). Handle for hand tools, in particular for professional knives, eg for butchers, cooks or the like, with a handle body (11) extending in the direction of the handle longitudinal axis (13),
characterized by
that the handle body (11) has a substantial cross-sectional volume and an at least substantially rectangular cross-section, the narrow surfaces (16, 17) of which extend above and below and the wide surfaces (18, 19) of which are on both sides, and that the rear end (14) is in relation to the front end (15) of the handle body (11) is twisted clockwise or counterclockwise about the longitudinal axis of the handle (13). Handle according to one of claims 1 to 4,
characterized,
that the torsion angle (α) is approximately in the order of magnitude between 10 ° and 40 °, in particular approximately in the order of 30 °. Handle according to one of claims 1 to 5,
characterized,
that the handle body (11) has approximately the shape of a linear and approximately rectangular torsion bar. Handle according to one of claims 1 to 6,
characterized,
that the ratio of the width of the wide surfaces (18, 19) to the width of the narrow surfaces (16, 17) of the handle body (11) is approximately 2 to 1. Handle according to one of claims 1 to 7,
characterized,
that each wide area (18, 19) has a width of approximately between 25 mm and 35 mm, preferably approximately 27 mm to 31 mm. Handle according to one of claims 1 to 8,
characterized,
that each narrow surface (16, 17) has a width of approximately between 10 mm and 20 mm, preferably approximately of 14 mm to 16 mm. Handle according to one of claims 1 to 9,
characterized,
that the to the broad surfaces (18,19) approximately symmetrical center plane (20) in the region of the front end (15) of the handle body (11) extends approximately in a plane within which there is approximately a hand tool, such as the blade (12) Knife, extends. Handle according to one of claims 1 to 10,
characterized in that the central plane (20) which is approximately symmetrical to the pulping surfaces (18, 19) in the region of the rear end (14) of the handle body (11) at an angle (α) approximately in the order of magnitude between 10 ° and 40 °, for example about 30 °, with respect to a plane within which, for example, a hand tool, for example the blade (12) of a knife, extends. Handle according to one of claims 1 to 11,
characterized,
that the longitudinal edges in the transition area of the narrow surfaces (16, 17) into the wide surfaces (18, 19) are slightly rounded. Handle according to one of claims 1 to 12,
characterized,
that the wide areas (18, 19) and / or the narrow areas (16, 17) are at least slightly bulged outwards. Handle according to one of claims 1 to 13,
characterized,
that the handle body (11), viewed in the direction of its rear end (14), is twisted in a counterclockwise direction about the handle longitudinal axis (13) and is designed as a right-handed handle. Handle according to one of claims 1 to 13,
characterized,
that the handle body (11), viewed in the direction of its rear end (14), is twisted clockwise about the handle longitudinal axis (13) and is designed as a left-handed handle. Handle according to one of claims 1 to 15,
characterized,
that the handle body (11) at least in the region of the front end has an at least downward protrusion beyond the lower narrow surface (17), for example approximately a hook-shaped projection (21) as finger protection or the like. having. Handle according to one of claims 1 to 16,
characterized,
that the handle body (11) consists of plastic. Handle according to one of claims 1 to 17,
characterized,
that the handle body (11) consists of an integrally molded part. Handle according to one of claims 1 to 17,
characterized,
that the handle body (11) is composed of at least two handle shells. Handle according to one of claims 1 to 19,
characterized,
that the handle body (11) on the hand tool, for example on a knife, on a file or the like, is injection-molded or otherwise secured in a non-positive and / or positive manner.

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