EP0208942B1 - Heft - Google Patents

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Publication number
EP0208942B1
EP0208942B1 EP86108371A EP86108371A EP0208942B1 EP 0208942 B1 EP0208942 B1 EP 0208942B1 EP 86108371 A EP86108371 A EP 86108371A EP 86108371 A EP86108371 A EP 86108371A EP 0208942 B1 EP0208942 B1 EP 0208942B1
Authority
EP
European Patent Office
Prior art keywords
handle according
handle
grip
zone
paddings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86108371A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0208942A2 (de
EP0208942A3 (en
Inventor
Jan-Eric Dipl.-Ing. Bandera
Peter Dipl.-Ing. Kern
Karl Lieser
Roland Dipl.-Ing. Schindhelm
Johannes Solf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Priority to AT86108371T priority Critical patent/ATE51560T1/de
Publication of EP0208942A2 publication Critical patent/EP0208942A2/de
Publication of EP0208942A3 publication Critical patent/EP0208942A3/de
Application granted granted Critical
Publication of EP0208942B1 publication Critical patent/EP0208942B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/105—Handle constructions characterised by material or shape for screwdrivers, wrenches or spanners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00—Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/12—Hand grips, preformed and semi-permanent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00—Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/902—Unitary handle composed of different cooperating materials

Definitions

  • the invention relates to a booklet for tools, in particular screwdrivers, according to the preamble of claim 1.
  • a booklet of this kind is known from US-A-2,871,899 and JP-A-60-2271.
  • the outer surface of the booklet viewed in the longitudinal direction of the booklet, has grip zones of harder and softer material one behind the other. This is achieved by sheathing a partial length of the cylindrical stapling body with the soft body, whereby the tool-side end area, which makes up about a third of the total length, is exposed as a harder gripping zone.
  • the applied sleeve-like sheath engages with corresponding axially aligned projections in corresponding grooves of the stitching core.
  • Such equipment made of rubber-like material which can be viewed practically as a full covering, is disadvantageous in terms of handling; it turns out to be too "spongy". Especially when used continuously, wrinkles and increased static friction cause redness or even inflammation on the operating hand.
  • the tool is not suitable for continuous use.
  • the short, harder gripping zone is also reduced in diameter and is mainly used for the so-called “twine", ie for the initial penetration of the screws under low load.
  • the application of a higher torque is reserved for the area of the softly covered booklet end.
  • a screwdriver handle which is specially designed from the point of view of the application of a high torque, that is to say that the handle can be stored well in the operating hand.
  • the individual fillets which are distributed around the circumference of the stitching body and are angled in this direction, allow a secure clamping grip.
  • the object of the invention is to design a generic tool in a technically simple, advantageous manner in such a way that high torques can be transmitted on the one hand, but on the other hand the grip is significantly improved and, above all, more pleasant to the hand.
  • the ring intermediate zone which has the largest diameter and lies in the middle of the hand, is thus available as a hard surface for the application of a high torque; it has the largest lever length (rotationally symmetrical) and forms the stable guiding zone for the re-gripping; the axially adjoining grip zones, on the other hand, are elastically flexible.
  • the screwing speed is also increased due to the smaller cross-sectional truncated cones; the so-called "twirling" can be used here.
  • the grip zones of softer material are interrupted in the circumferential direction by intermediate sections of harder material. In this regard, a uniform, balanced hard / soft distribution of the available gripping surface can be achieved.
  • a structure which corresponds to the grip-friendly structure of the tool booklet according to DE-B 1 298 060 with the added advantage of improved grip results from the fact that the grip zones of softer material form individual fillets which extend into the intermediate zone.
  • this intermediate ring zone embedded in the elastic grip mass like a wheel body is consequently also fully structurally included in the measure for achieving good grip.
  • a polygon is practically achieved in the cross-sectional area of the individual fillets.
  • the end face facing away from the blade is equipped with a spherical dome made of hard plastic. This allows leverage to be exerted on the exercise book without the risk of stressing the palm of the hand.
  • the fact that ring grooves are formed further in the end faces of the intermediate zone increases the connecting zone between the two types of material.
  • the "joint”, which is also offset in planes, brings an advantageously large material accumulation, so that it does not tearing or spreading of the two bonded materials forming the tool booklet occurs.
  • the circular ring zone is better than or a polygonal ring zone, especially for larger booklets. If the former is present, the polygonal shape of the blade-side end region has the advantage that the filed booklet cannot roll away.
  • the gripping zones are made of softer material than pads used in depressions of the base body consisting of harder plastic material.
  • the skin of the operating hand only lies on the harder grip areas mainly when the protruding area is pressed in. Furthermore, the invention proposes that the cushions are inserted in the region of the individual hollow legs and that they form a top side that is designed to be concave in the direction of the throat and that is convex in the transverse direction. Accordingly, they are hollow back-like cushions on the outside, the back of which is arched. From a manufacturing point of view, it proves to be advantageous that the cushions are designed uniformly with one another.
  • a screwdriver blade 1 with a hexagonal cross section is incorporated into the illustrated base body K.
  • the screwdriver handle has at its blade end an annular groove 2 which ends in the end of the handle in a collar 3 which can be polygonal according to FIGS. 4 and 7.
  • the other end of the stitching body section which attaches to the ring fillet 2 is designed in a modification of a basic barrel shape (see dash-dot line "F" in FIGS. 1 and 7). It is designed so that on both sides of an annular zone 4 in the plane x-x of the largest handle base body diameter D lying transverse to the blade 1 4 individual grooves 5 and 6 extend. The latter run in the longitudinal direction of the basic booklet body K. They are concave in this direction in such a way that the individual fillets 5, 6 from the ring zone 4 of the largest diameter of the booklet body D to the smaller diameter of the basic booklet body d 1 and d 2 drop. With regard to these sections, one can therefore speak practically of frustoconically tapering zones extending on both sides of the largest diameter in the manner of truncated cones. The latter are facing each other with their larger base areas.
  • the individual fillets 5 and 6 are arranged in an angularly symmetrical arrangement about the longitudinal central axis y-y of the base body K of the booklet. Seen in the circumferential direction, the individual fillets 5, 6 form a rectilinear base 8 (see FIGS. 3 and 10), which could also be slightly concave. The angular distance between the individual fillets is 60 ° to each other.
  • the marginal edges 9 of the individual fillets 5 and 6 are rounded both in the transverse direction and in the longitudinal direction of the base body K.
  • the curves are only made so far that only the edges generated by the fillet are broken, but otherwise there is a multifaceted basic shape with high grip.
  • the quite multifaceted gripping surface of the basic magazine body K has hard and soft-elastic grip zones. So are the tapered zones according to FIG. 2, ie the two truncated cones as soft grip zones W are realized, ie they are predominantly made of resilient, compressible material on the outside, such as, for example, soft plastic, rubber or the like.
  • the individual grooves 5 and 6 lying on the tapering zones also go into the hard plastic intermediate zone 4. These account for about a third to a quarter of the surface.
  • the ring-individual fillet 2 adjoining the zone tapering on the blade side is likewise made of the elastically flexible material according to FIG. 2. It is a relatively weakly hollowed section of the ring throat.
  • the latter has a hard plastic core 10, which contains the end of the screwdriver blade 1 molded on the base body side and equipped with flattened wings 11. Such wings can be produced by flattening the shaft 1 of the blade 1, which is hexagonal in cross section.
  • the elastically resilient zone consequently occurs in the shaft-covering overlap region as a jacket M 1 (FIG. 2).
  • the hard plastic core 10 continues practically over the entire length of the base body K of the booklet. This section is designated 10 '.
  • both tapered sections are formed in the form of elastic sheaths M2, M3 around the hard plastic core 10/10 '.
  • the thickness of the shells M1, M2, M3 is essentially constant. This results in equivalent elasticity for the soft areas.
  • the fingers of the holding hand do not "drown" in the elastic material.
  • the core rather leads to a stabilizing basis.
  • a dome-shaped tip 12 made of hard plastic. This can be a separately formed, subsequently attached individual component (as shown in FIG. 2) or, of course, an immediately molded tip. The multiple parts are recommended if such a crest 12 is to consist of even harder material, for example if such tool handles for chisels (chisels) are to be used.
  • a central pin 13 of the dome enters a corresponding recess 14 in the end section of the hard plastic core 10.
  • the spherical top surface runs smoothly into the tapered zone made of elastic material.
  • the surface of the hard plastic core 10/10 'roughly matched to the surface shape of the base body of the booklet is strongly grooved or stepped. This leads to an intimate bond between the jacket-forming elastic material.
  • Such a structure of the core proves to be particularly advantageous when the shells M1 to M3 are molded onto the core.
  • the shells M2 and M3 are connected to one another due to tunnel-like openings 15 in the intermediate zone. A total of four such openings 15 arranged at the same angle are provided.
  • the material bridges connecting the two sheaths M2 and M3 concealed with one another have the reference number 16.
  • the openings 15 there are longitudinal bores which are parallel to the longitudinal center axis y-y and have the same spacing.
  • the end faces 4 'of the annular intermediate zone 4 have annular grooves 17.
  • the adjacent soft material can step practically roof-shaped under the edge of the hard plastic ring zone 4. There is a larger joint area and thus a good adhesive bond.
  • the individual fillets 5 rise slightly, especially in the area of the stitching body on the blade.
  • the thumb as a counterpart, ie its end member in the single fillet 5 finds a favorable support position and thus favors a quick and easy turning (so-called twisting) of the screwdriver, which occurs when a screw is screwed in before Tightening is one of the main functions of the screwdriver.
  • the fold of the joint between the middle link and the end link comes to lie exactly in the ridge of the intermediate ring zone 4 of the largest diameter D of the basic body K of the booklet. When stored in this way, the thumb experiences its largest contact surface.
  • the ball of the thumb and the wrist can therefore tightly enclose the base body K.
  • the latter encompassing other fingers find equally favorable storage positions in the individual fillets 5 and 6, with the different lengths of the individual finger limbs and the position of the fingers being fully taken into account by designing the basic magazine body in a modification of a basic barrel shape.
  • the single fillets 5, 6 and their special geometric arrangement provide optimal insert surfaces for the fingers and prevent the risk of the hand slipping off the staple body K.
  • the overall strongly faceted surface still allows a certain adjustment to different indentation parts, since the elastic resilient grip zones W allow the appropriate adjustment. Nevertheless, high torque can be achieved via the harder ring zone, which has the largest diameter. 4 to 6, the resilient material surfaces W and the hard plastic areas H are each provided in a different division.
  • the soft material extends into a polygonal end section E as a roll-away protection, which is so large that it is lying booklet comes into contact with the pad due to the weight of the blade.
  • the screwdriver booklet according to the second embodiment (FIGS. 7 to 11) is basically of the same structure; the reference numbers are used analogously, sometimes without textual repetitions.
  • the two grip zones W of softer material lying adjacent to the grip zone H of harder material are here divided on the one hand into the intermediate zone 4 of the largest diameter D, that is to say interrupted.
  • soft zone fields lie within a practically lattice-like surface structure of the hard handle base body K.
  • the interruption lies in the circumferential direction, as a result of which soft and hard grip zones W and H alternate with one another in this direction. Such a subdivision is also conceivable in the axial direction.
  • the grip zones W of other materials form single fillets which merge into the intermediate zone.
  • the grip zones W of softer material are designed as pads P which are inserted into depressions 18 of the base body K made of a harder material.
  • the depressions 18 have undercut side walls 19 on all sides. The undercut angle is 20 ° to the base of the recess.
  • the side walls 19 are gripped behind by the correspondingly trapezoidal foot of the cushion P, so that there is a good support for the cushion P with correspondingly positive engagement.
  • the cushions P protrude above the fillet 8 of the individual fillets 5, 6. Their upper side, when seen in the transverse direction, is convex. The bulge can extend over the entire transverse width of a single fillet.
  • an upper-side curvature that is only near the edge is also conceivable, so that, as in the exemplary embodiment, the surface area of the upper side that remains between the transverse transverse curvatures runs parallel to the base of the recesses 18.
  • the transversely rounded edge region of the pads P overlaps the recess edge 20 like a lip.
  • the cushions P take on a concave fillet shape to match the shape of the individual fillets 5, 6 (see FIG. 8).
  • the section of the cushions projecting beyond the individual fillets 5 corresponds to approximately one third to one fifth of the total thickness of the cushions.
  • the cushions P are of identical design to one another (the slight deviations are due to the drawing).
  • the cushions P have a corresponding, almost congruent plan.
  • the ends of the pads P pointing in this central direction are somewhat wider.
  • the assembly of the booklet is consequently carried out in such a way that the mutually identical pads P on the two truncated cones are used upside down.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Materials For Medical Uses (AREA)
  • Casings For Electric Apparatus (AREA)
  • Saccharide Compounds (AREA)
EP86108371A 1985-07-13 1986-06-19 Heft Expired - Lifetime EP0208942B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86108371T ATE51560T1 (de) 1985-07-13 1986-06-19 Heft.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853525163 DE3525163A1 (de) 1985-07-13 1985-07-13 Werkzeugheft, insbesondere fuer schraubendreher
DE3525163 1985-07-13

Publications (3)

Publication Number Publication Date
EP0208942A2 EP0208942A2 (de) 1987-01-21
EP0208942A3 EP0208942A3 (en) 1987-06-03
EP0208942B1 true EP0208942B1 (de) 1990-04-04

Family

ID=6275776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108371A Expired - Lifetime EP0208942B1 (de) 1985-07-13 1986-06-19 Heft

Country Status (4)

Country Link
US (1) US4739536A (enrdf_load_stackoverflow)
EP (1) EP0208942B1 (enrdf_load_stackoverflow)
AT (1) ATE51560T1 (enrdf_load_stackoverflow)
DE (2) DE3525163A1 (enrdf_load_stackoverflow)

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* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
ATE51560T1 (de) 1990-04-15
DE3670028D1 (de) 1990-05-10
DE3525163C2 (enrdf_load_stackoverflow) 1987-05-07
EP0208942A2 (de) 1987-01-21
DE3525163A1 (de) 1987-01-22
US4739536A (en) 1988-04-26
EP0208942A3 (en) 1987-06-03

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