EP0662372B1 - Grip for hand tool - Google Patents

Abstract

The rear end of the shaft (2) is non-turnably held by the main section (1). A grip section (3) is pushed onto the rear part of the main section, so as to be non-turnable. Grip elements (4) are inserted in groove-like apertures (1c,3c) in the main section and/or grip section. A profiled filling ring (9) is located between main and grip sections. A filler part and/or a spacer ring may be inserted into the end of the grip. An impact part may also be fitted into the end of the grip. The part consists pref. of hardened steel, and engages on the end of the grip.

Description

The invention relates to a handle for hand tools, in particular screwdrivers, for the non-rotatable mounting of the rear end of the front end with a functional part, in particular one Screwdriver blade, provided shank in a main part, being a Handle part can be attached to the rear area of the main part so that it cannot be rotated is.

Handles of the type described above are in many versions known. They are preferably made of plastic and take the rear end of the shaft either fixed or replaceable. Furthermore it is known to lock the rear part of the handle as a cap Interchangeable receptacle at the front end of the To form the shaft to be arranged functional parts.

WO-A-91/12932 is a replaceable tool handle known, the one provided with a functional element and a shaft Grip part includes which with the end facing away from the functional element the shaft is interchangeably connected via locking elements. Out US-A-2 871 899 also discloses a shaft to provide receiving base body with a sheathing, which in Contrary to the basic body is made of an elastic material, to an increased due to the resulting greater friction Achieve torque initiation. A generic handle for Hand tools are known from GB-A-2 206 306, in which one with one Functional element of the shank, which is cohesive and in this way is cast non-rotatably into a handle body serving as the main part, this handle body at its end facing away from the shaft Has polygonal section, on which a special, wide-reaching Handle to reinforce the introduction of torque if sufficient existing space requirement can be plugged on.

The invention has for its object to develop a handle for hand tools described above such that it can be inexpensively manufactured with high quality from different materials adapted to the respective application.

This object is according to the invention characterized by groove-like recesses in the main part and / or the grip member insertable haptic.

By dividing the handle into the main part and the handle part and the use The advantage of separate haptic elements results on the one hand an inexpensive and high quality manufacture, because the Individual parts have a small volume and therefore with optimal Surface quality with simultaneously shortened production cycles - preferably by injection molding - made of different materials can be made, each part being independent of the others Parts are made of a material suitable for their specific purpose, for example hard material for the main part, soft material for the Grip part and elastic and sympathetic as well as non-slip material for the haptic parts. On the other hand, the separately manufactured Haptic elements and possibly differently designed handle parts a simple one Adjustment of the shape and size of the Handle to ensure an optimal adhesion between hand and Achieve grip and improve handling. It also follows also easy recycling of different materials existing items. Finally, the inventive Distribution of the handle with low inventory, for example by Use of identical main parts but different handle parts and / or Haptic elements with different handles either for hand tools different functional parts or for different customers.

It is particularly advantageous if the shaft can be replaced, so that a defective or worn functional part can be replaced inexpensively can be.

According to a further feature of the invention, between the main part and Handle part of a coding ring can be arranged. This coding ring is used for in particular color coding of different functional parts, for Example of different screwdriver tips for slotted, Phillips, Allen or Torx screws.

A further coding of the handle according to the invention can thereby be achieve that according to the invention a filler in the end of the handle is used by the color and / or symbols applied to the indicates the respective training of the functional part.

According to a further feature of the invention is in the end of Handle a striker preferably made of tempered steel used that with its inner end face at the end of the shaft is present. This results in an impact load on the hand tool immediately undamped on the end of the handle and without risk of Damage to the shaft and thus transfer the functional part. If the striking piece according to a development of the invention with key surfaces provided and screwed to the end of the shaft, this can in addition, an axial bearing securing, for example, by radial protruding ribs against rotation secured shaft can be achieved.

In a preferred embodiment of the invention, the haptic elements with laterally protruding, undercut longitudinal grooves in the main part and / or grip part engaging guide strips. In this way the haptic elements can be easily and safely assembled attach the handle.

In a preferred development of the handle according to the invention the main part and the handle part on a pin-like extension on one of the parts and a corresponding axial receiving opening on the other Part connected. This configuration makes it easy to manufacture and a secure hold thanks to large contact surfaces ensuring connection between the main part and handle part. Around to prevent unwanted twisting of the handle part relative to the main part, are the pin-like connection and the axial receiving opening a preferably polygonal cross-section deviating from the circular shape educated.

Fig. 1

eine perspektivische Darstellung in der Art eines Sprengbildes einer ersten Ausführungsform,

Fig. 2

eine Seitenansicht des in Fig. 1 gezeichneten Handgriffes,

Fig. 3

eine Stirnansicht des Handgriffes ohne Schaft,

Fig. 4

eine rückwärtige Ansicht des Handgriffes,

Fig. 5

einen Längsschnitt durch den Handgriff nach Fig. 2, wobei jedoch in der unteren Hälfte der Hauptteil ungeschnitten gezeichnet ist,

Fig. 6

eine stirnseitige Ansicht des in Fig. 5 gezeigten Griffteiles mit eingesetzten Haptikelementen,

Fig. 7

eine rückwärtige Ansicht des Hauptteiles nach Fig. 5;

Fig. 8

einen der Fig. 5 entsprechenden Schnitt durch eine zweite Ausführungsform und

Fig. 9

einen weiteren, der Darstellung in den Fig. 5 und 8 entsprechenden Schnitt einer dritten Ausführungsform.

Three exemplary embodiments of a handle according to the invention are shown in the drawing, namely:

Fig. 1

2 shows a perspective illustration in the manner of an explosive pattern of a first embodiment,

Fig. 2

2 shows a side view of the handle drawn in FIG. 1,

Fig. 3

a front view of the handle without shaft,

Fig. 4

a rear view of the handle,

Fig. 5

3 shows a longitudinal section through the handle according to FIG. 2, but in the lower half the main part is drawn uncut,

Fig. 6

5 shows an end view of the handle part shown in FIG. 5 with inserted haptic elements,

Fig. 7

a rear view of the main part of FIG. 5;

Fig. 8

5 corresponding section through a second embodiment and

Fig. 9

another section corresponding to the representation in FIGS. 5 and 8 of a third embodiment.

As can be seen particularly clearly from FIG. 1, the handle consists of a main part 1, the embodiment with a pin-like extension 1a is provided and the one of receiving the rear end Shank 2 is used on its front, not shown in the drawing End is provided with a functional part, such as a screwdriver blade. In order to keep the shaft 2 non-rotatably in the main part 1 the shaft 2 is provided with radially projecting ribs 2a, which correspond to corresponding Engage longitudinal grooves 1b in main part 1.

On the pin-like extension 1a of the main part 1 is a handle part 3 a receiving opening corresponding to the peg-like extension 1a 3a put on. The roughly triangular cross section of the cone-like extension 1a and the corresponding receiving opening 3a can be seen in FIGS. 6 and 7. The handle part 3 is thus non-rotatable held on the main part 1.

Both in the main part 1 and in the handle part 3 are groove-like, in the longitudinal direction recesses 1c or 3c of the handle are formed, in the haptic elements 4 before assembling the main part and the grip part are used, those with laterally protruding, in the undercut recesses 2c or 3c engaging guide strips 4a are provided. This Guide strips 4a can be seen most clearly in FIG. 1. The Haptic elements 4 consist of a particularly non-slip and sympathetic handle Material and are in terms of shape, size and surface quality adapted to the respective use of the handle.

In the first embodiment shown in FIGS. 1 to 7 is in formed a central recess 3b in the rear part of the handle part 3 an impact piece 5, preferably made of hardened steel, is used. This Striker 5 is in the embodiment with an internal thread provided that on a formed at the rear end of the shaft 2 threaded pin 2b is screwed on, so that the shaft 2 is not only by means of its radially projecting ribs 2a are held non-rotatably in the main part 1 is, but by screwing it to the striker 5 at the same time in its axial position is secured in the handle. This takes over Striker 5 continues to secure the position of the grip part 3 on the main part 1. To tighten the striker 5 on the threaded pin 2b to enable the shaft 2, the striker 5 at Embodiment with two holes 5a for a correspondingly executed Provide tool (see Fig. 4).

The second exemplary embodiment according to FIG. 8 essentially corresponds Design of the first embodiment. It is different from this characterized in that the striker 5 only in the recess 3b of the Handle part 3 is inserted. The striking piece 5 touches with his inner end face the rear end of the shaft 2, is with this but not screwed.

The third exemplary embodiment according to FIG. 9 finally shows one for work certain design on electrical systems, in which the shaft 2 with Exception of the functional part is surrounded by an insulating sleeve 6, which up to the front end face of the main part 1 protrudes. In this embodiment The shaft 2 ends insulated within the handle part 3. In the rear end In this embodiment, this grip part 3 is a filler 7 in the recess 3b used, which carries a colored coding ring 8. This coding ring 8 can on the respective application of the handle and / or on the indicate the respective design of the functional part of the shaft 2. Furthermore it is possible to provide the filler 7 with symbols, for example point out the design of the functional part.

Another possibility for coding the handle is shown in FIG. 1, 5 and 8. As can be seen in particular from FIG. 1, in these two first embodiments between main part 1 and handle part 3 a colored Coding ring 9 are used, the color design of the design of the functional part and / or on the intended use of the respective Handle indicates. This coding ring 9 is also in cross section in FIGS. 5 and 8 can be seen.

Reference list

1

Bulk

1a

cone-like extension

1b

Longitudinal groove

1c

Recess

2nd

shaft

2a

rib

2 B

Threaded pin

3rd

Handle part

3a

Receiving opening

3b

Recess

3c

Recess

4th

Haptic element

4a

Guide bar

5

Percussion

5a

Drilling

6

Insulating sleeve

7

Filling piece

8th

Coding ring

9

Coding ring

Claims (9)

1. Grip for hand tools, in particular screwdrivers, for accommodating, in a non-rotatable manner, the rear end of the shank (2), which is provided at the front end with a functional part, in particular a screwdriver point, in a main part (1), it being possible for a grip part (3) to be attached, in a non-rotatable manner, to the rear region of the main part (1), characterized by tactile elements (4) which can be inserted into groove-like recesses (1c, 3c) in the main part (1) and/or the grip part (3).
2. Hand grip according to Claim 1, characterized in that the shank (2) is exchangeable.
3. Hand grip according to one of Claims 1 or 2, characterized in that a coding ring (9) is arranged between main part (1) and grip part (3).
4. Hand grip according to one of Claims 1 to 3, characterized in that a filler piece (7) and/or a coding ring (8) is inserted into the end of the grip part (3).
5. Hand grip according to at least one of Claims 1 to 4, characterized in that an impact piece (5), which is preferably made of heat-treated steel and the inner end face of which bears against the end of the shank (2), is inserted into the end of the grip part (3).
6. Hand grip according to Claim 5, characterized in that the impact piece (5) is provided with key surfaces (5a) and is screwed to the end of the shank (2).
7. Hand grip according to at least one of Claims 1 to 6, characterized in that the tactile elements (4) are provided with laterally protruding guide strips (4a) which engage in undercuts of the recesses (1c, 3c) in the main part (1) and/or the grip part (3).
8. Hand grip according to at least one of Claims 1 to 7, characterized in that the main part (1) and the grip part (3) are connected to one another by means of a peg-like extension (1a) on one of the parts and a corresponding axial receiving opening (3a) on the respectively other part.
9. Hand grip according to Claim 8, characterized in that the peg-like extension (1a) and the axial receiving opening (3a) are formed with a non-circular, preferably polygonal, cross-section.

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