EP0746450B1 - Hand-held screwdriver - Google Patents

Description

The invention relates to a hand screwdriver Housing with lid for storing a variety of tool or socket wrench inserts preferably provided in it parallel troughs and with tool shank for holding the tool or socket wrench inserts.

Storage boxes are known for this purpose, which are used in an emergency Use as a screwdriver or offset screwdriver Find. There are also so-called magazine screwdrivers known, the tool shank is fixedly arranged in the booklet.

The aforementioned storage boxes (DE-PS 3 400 068, DE-GM 8 506 150) take six to nine short screw inserts, so-called bits or drills, grains, drawing pins, awls as well a magnetic tool shank in its housing and so on a partially rotatable magazine part for this purpose.

As a result, the tool is also for machines screwing work to be carried out can be used. Such tools can only be used as a makeshift in the professional sector, since they are mainly designed for the hobby area.

With this compact design, the housing serves this purpose Storage boxes as a handle. It is therefore proportionate short and therefore has a large diameter to the o.g. To be able to accommodate all parts. The great Diameter proves to be ergonomically unfavorable, does not allow transmission of high torques, leads to Continuous work for premature hand fatigue and even for Pressure marks in the hand.

In addition, there is a risk that the lid may become unwanted twisted relative to the magazine part, which in use not only the screwing process adversely affected but also the tool inserts in the boxes fall out.

In addition, the number of tool inserts that can be picked up narrowly limited.

These storage boxes are therefore today's requirements no longer fair in practice because the required Number of different tool inserts as a result constantly increasing number of different screw systems increases rapidly.

Another disadvantage is that the short length of the Tool shank or magnet holder only when screwing an unfavorable alignment of the tool is possible. Hereby is also the view of the screw head through the Hand locked. In addition, accessibility is very often low-lying screws by abutting the housing on adjacent lying parts not possible.

The housing of another well-known hand screwdriver, DE-PS 3 734 016, has a square oblong shape on. In this case, only three can be stored in three magazines insertable tools can be accommodated. Such a tool is both in the longitudinal direction and as a cross screwdriver can be used because the tool inserts on both Face in the axial direction and on the opposite Front can be inserted transversely to the longitudinal axis.

As a result of the recesses in the housing for inserting the provided drawer magazine is the housing against denting and twisting not stable, so that only hobby-like Screwing work can be carried out with this. Also are the parts of the housing in the area of the inserted tool inserts relatively bulky, which makes the operation is difficult. This occurs especially in tight spaces also often bumping the housing.

Other well-known storage boxes for a variety of tool inserts with a tool shank that fits into a Coupling opening of the housing can be used, thereby a Auxiliary screwing tools are known. These screwing tools are designed for hobby use only, cannot sufficiently long tool shank for use in Record professional area, the housing is short and flat cuboid designed and can therefore not be done well by hand turn, it is still ergonomically good in the hand, the number the removable tool inserts is also very limited (DE-GM 8 913 207, DE-OS 40 05 573, DE-GM 9 205 315).

In other known magazine screwdrivers with a longer one Shaft and the possibility to accommodate tool inserts in the booklet, is the number of insertable tool inserts also very limited, the tool shanks are fixed with connected to the magazine, the tool shafts can be do not use in a machine (US Pat. No. 4,278,119, US-PS 4,434,828, DE-OS 30 04 958, GB-PS 1 578 372, FR-PS 2 429 653).

In summary, it can therefore be stated that in the known Hand screwdrivers, the handle of which forms a housing, in which a number of tool inserts - like after DIN 3126 Form C 6.35 in short version -, is kept, the additional storage of a long tool shank is not possible, or that the tool shank is not as loose Part is present and therefore not separate e.g. into a prime mover can be used, or that the number of to be kept Tool inserts is very limited (maximum 9 Tool inserts), or that use as a heavy-duty Combination tool in the professional area due to the unfavorable geometries is not given, or that use as a high torque cross handle tool is excluded.

The invention is therefore based on the problem of a fully suitable hand screwdriver for any use create its booklet for storing one at the multitude larger number adapted to different screw systems of short tool inserts, especially after DIN 3126 Form C 6.35, is suitable and still handy Has length and thickness dimensions. Subtask is creating a hand screwdriver that is applicable both in the longitudinal axis as a tool and can be used as a cross handle screwdriver. Additional sub-task is creating a hand screwdriver, the alternative with socket wrench inserts and accordingly trained square adapter with other tool inserts can be equipped.

The solution to this problem results from the features of claim 1.

The advantages achieved by the invention are that with relatively little effort a universal hand screwdriver with a sufficiently long shaft at a favorable price There is a ratio of the handle length / handle thickness. This Hand screwdriver takes the common tool or socket wrench inserts in large numbers as well as a separate one Tool shank. The inclusion of the tool or Key inserts and the tool shank are carried out exclusively in the handle of the hand screwdriver.

This hand screwdriver is therefore sufficient as a hand tool the demands of professional use as a result of compact design with a favorable ratio of the handle diameter to its total length, the demands for high strength its housing on pressure with the lid closed, the claims compact design due to loosely arranged tool shank. The tool shank is used to hold the Tool or socket wrench inserts. He enables through its relatively large overall length is fatigue-free and also trouble-free when operating deep-lying screws Work. As a minimum for a full Set of tool inserts is suggested, at least three Phillips Recess, three Pozidriv and six Torx inserts to provide.

To take in pockets of clothing is the invention Screwdriver due to its short length Lack of a stuck long tool shank excellent suitable and therefore to accommodate well and accident-proof. These advantages are achieved by training the booklet with handle-like outer longitudinal and transverse dimensions in combination with the formation of the booklet as a hollow body over the entire handle length. This creates an interior that surprisingly at least twelve tool inserts as well additionally take up a correspondingly long tool shank can or in an alternative embodiment at least eleven Socket wrench inserts and shortened tool shank.

For this purpose, the booklet has one on the book jacket Opening, which is closed by a lid. The opening and the cover extend in the essential just as the entire handle length as the Inner space.

Due to the arrangement oriented secant to the longitudinal axis the tool inserts are still saved space. This required it recognizes that secant tool inserts in a prismatic body of handle-like cross-sectional dimensions are to be accommodated.

It is only in this way that the required Space provided for an axially lying trough, in which is inserted according to the handle length of the tool shaft can be. The particular advantage of this embodiment is therefore in the ability to handle the tool shank to make it long and thick like a handle. Below are To understand lengths of about 100 to 140 mm, but without this Limitation of the invention to the limits mentioned. About that in addition, the cross-sectional dimension should be in the range of about 30 mm so that the booklet easily grips with one hand and can be kept high torque. For attachment There are several options for the cover on the booklet mention. On the one hand, the lid can be used as a separate component design that can be snapped into place with clip fasteners. Especially The lid can be advantageous because it is captive by means of a longitudinal hinge axis on the handle be struck, especially in combination with a Film hinge

The hinge can also be formed by the end protruding hinge pins on the lid, which in corresponding Recesses of the window on the handle intended for the cover can snap into place.

This is despite a simple assembly of the cover on the handle a solid hinge connection between cover and Exercise book achievable.

A further development in which the cover is advantageous is advantageous lockable with elastic claw on the handle is.

Furthermore, the booklet in the area of the axial center radial plug-in device for plugging together with have the tool shank, so that such a hand screwdriver can also be used as a cross handle screwdriver.

In a further advantageous embodiment for holding the tool shank or the tool / plug key inserts metallic connectors as inserts in Plastic of the booklet provided. This creates stability the coupling parts, housing / tool shank, also at Continuous operation and high initiated torques favorably affected.

Is the tool shank in a training with one Magnet holder is a snap-in insertion and removal of tool inserts possible and this with more convenience Service.

The insertion troughs arranged secantially in the handle according to claim 10 offer easy insertion and removal of the tool inserts. You give the tool inserts sufficient hold with the additional possibility of one given handle length maximum number of tool inserts to accommodate.

The separate tool shanks can also be used as Serve coupling piece when mechanically screwing then as a link between the tool insert and the machine holder. Advantageously, the possible with this invention large shaft length compared to the usual short versions also a clear view of the screw to be screwed as well as better handling due to sensitive alignment Leadership too.

Fig.1,12

Gesamtansicht eines gebrauchsfertigen Erfindungsgegenstandes,

Fig.2

Querschnittdarstellung gemäß der Linie A-B nach Fig.1,

Fig.3

Ansicht auf den Erfindungsgegenstand bei geöffnetem Deckel, bestückt mit Werkzeugeinsätzen und zugehörigem Werkzeugschaft,

Fig.4

Querschnittdarstellung gemäß der Linie C-D nach Fig.3,

Fig.5

Ansicht in Pfeilrichtung Z entsprechend Fig.1, wobei das Gehäuse im Bereich der Werkzeugeinsätze aufgebrochen ist,

Fig.6

Ansicht auf den Erfindungsgegenstand als Quergriffwerkzeug,

Fig.7 bis 11

Ansichten gemäß Fig.1 bis 4 und 6 jedoch mit Steckschlüsseleinsätzen.

Embodiments of the invention are shown in the drawing and are described in more detail below. Show it

Fig. 1.12

General view of a ready-to-use object of the invention,

Fig. 2

Cross-sectional representation along the line AB of Fig.1,

Fig. 3

View of the subject matter of the invention with the lid open, equipped with tool inserts and associated tool shank,

Fig. 4

Cross-sectional representation along the line CD of Figure 3,

Fig. 5

View in the direction of arrow Z corresponding to FIG. 1, the housing being broken open in the region of the tool inserts,

Fig. 6

View of the subject of the invention as a cross grip tool,

Fig. 7 to 11

Views according to Fig.1 to 4 and 6 but with socket wrench inserts.

Unless otherwise stated below, the following description always for all figures.

Such a hand screwdriver 1 essentially exists from a booklet 2 and from a front page 3 inserted loose tool shank 4.

In the present case, the booklet forms an elongated prismatic one Hollow body. The hollow body represents an interior 8 ready, which of the inclusion of at least twelve to each other adjacent tool inserts 12 is used. Nevertheless are the outer longitudinal and transverse dimensions of the booklet essentially handle-like. For one embodiment points the booklet 2 has an overall outer length 14 of about 120 to 140 mm. The cross-sectional dimensions according to the dimension 16 are about 30 mm.

To the required high number of tool inserts and at the same time to accommodate the tool shank 4 extends the interior 8 of the hollow body essentially over the entire Handle length 14, only shortened at the two ends to the inside length 11. It is understood that the lid 21 also a length corresponding to the inside handle length 11 has.

It is also essential that the tool or socket wrench inserts 12 in the secantial direction to the longitudinal axis of the hand screwdriver. (Fig. 2,8). With that, too a radial insertion direction can be included. You will be in held in this direction by insertion troughs 13. The transverse dimensions the insertion troughs 13 are chosen so that an unintentional falling out of the tool inserts 12 is avoided, but this is easily pulled out by hand can be. In addition, lies parallel to that along one Line-arranged insertion troughs 13 one to the insertion troughs adjacent shaft recess 15, which in the longitudinal direction of the Handle runs and extends essentially over the entire Inner length 11 of the interior extends.

In this shaft recess 15 is a correspondingly long Tool shank 4 inserted and there with suitable undercuts or the like. captured.

In addition, it can be seen that the cover 21 by means of Longitudinal hinge axis 125 struck on handle 2 is. For this, either so-called pivot hinges can be used or a film hinge 42 can be used. (Fig.4). In any case, by means of this hinge axis 125 Booklet 2 is designed to be foldable over a partial jacket so that the interior 8 is freely accessible from the outside. This means that the protruding from the troughs 13 Ends of the tool inserts 12 are freely accessible.

On the other hand, the lid 21 should be on its opening side can also be firmly connected to the magazine. This serves a claw 24 which remains in the corresponding notch 25 Part of the booklet 2 snaps into place in an elastically lockable manner. On in this way the cover 21 can be closed with respect to the booklet 2.

In addition, Figure 6 shows that the booklet 2 in the area the axial center M is a radial connector (Insert 6), so that the booklet 2 on this connector prepared to be plugged into the tool shank 4 is. In this way, a cross grip tool is provided which alternatively or in addition to that in 1 shown embodiment provided as a longitudinal handle tool can be.

The housing 5 of the booklet 2 preferably consists of a Spray plastic. Then it is advisable to use 6 or the inserts 6 made of a high strength material e.g. Produce metal and inject it into the housing 5, press in or glue in. This creates a tight fit of the insert 6 achieved with the booklet, the insert 6 with the Issue 2 firmly connected.

Due to the fixed connection, it can also be used in plastic insert length 7 of the insert 6 of the handle remain low because a high-torque connection is established is.

The top end 9 of the handle is crowned, thus an ergonomic system on this face the hand is made possible. In this way, high Introduce pressure forces into the booklet and risk of injury avoid with sharp edges.

The interior 8 of the housing 5 is, as I said, on the Cover 21 accessible. It has an inner length 11 which approximately over the entire outer length 14 of the booklet 2 extends. This will make for the tool or socket wrench inserts 12 a roughly handle-long accommodation space provided, as well as the possibility to include a created accordingly long tool shank 4.

The tool or socket wrench inserts 12, 34 are in their lower areas surrounded by the troughs 13 and are there with their respective side areas.

Due to the close proximity of the tool or socket wrench inserts it is possible to at least on the inner length 11 twelve tool inserts 12 directly next to each other to accommodate adjacent across the longitudinal direction accordingly 2 to 5 and 8 to 10.

The invention is based on the knowledge that already handle-like dimensions to accommodate everyone screwdriver bits required today for different screw types are perfectly sufficient. This is despite the tool inserts 12 used, an outside diameter 16 in optimal size for favorable ergonomic conditions possible. Instead of the tool inserts 12, others can also be used Tool inserts such as scriber, center punch, drill, countersink, thread cutter or the like. be used.

Parallel to the troughs 13 is still after this Invention extending in the longitudinal direction of the booklet 2 Shaft recess 15 provided in the interior 8. In this trough 15, the tool shank 4 can be inserted.

The front ends 18 of the opening 127 for the lid have holes 19, in which overcoming the Elasticity of the cover 21 round lugs 20 when pressed in snap on the lid 21 during assembly.

For this purpose, the two approaches 20 lie on a common one Axis, on the two opposite transverse sides of the lid 21. They form after snapping into the holes 19 a continuous hinge axis 125 for the lid. The cover 21 is thus on along the hinge axis 125 one of its long side areas hinged and therefore easy to open so far that the ones behind it Tool inserts 12 as well as the tool shank 4 can be easily grasped.

The lid 21 complements the outside with its outer surface 22 the hexagonal or other selected outer shape of the Book 2

The lid has at least one approximately central to the frontal ends of the lid arranged elastic claw 24. In the present case, a claw 24 is provided, which is arranged in the center of the lid. The claw 24 snaps in closed state in an associated notch 25 of the booklet 5 elastic one. This makes the lid 21 a safer one Lent in the locked state.

The lid 21 also has an inside length distributes circumferential ribs 27, which cooperate with support portions 28 of the housing 5.

For this purpose, the ribs 27 lie on the support portions 28 in the closed state of the lid 21 or this indirectly opposite and thus stabilize the shape of booklet 2 as well when powerfully squeezing due to heavy screwing.

It is understood that the ribs 27 also in the longitudinal direction of issue 2 can be oriented. It is essential that each rib on an existing at the bottom of the interior 8 Support section 28 essentially rests as soon as the cover 21st closed is.

6 is in the axial center of the booklet 2 another insert 6 inserted into the housing 5. The mission 6 points in the radial direction with respect to the housing. In these Insert 6 of the tool shank 4 is to be used when the Screwdriver can be used as a cross handle screwdriver should.

The tool shank 4 consists of a hexagonal Shank piece 26, which is inserted into the insert 6 and there by means of a known holding device, e.g. more cushioned Holding ball 23, secured against accidental falling out is. At the front of the tool shank 4 is a magnet holder 30 put on. The magnet holder 30 has at its free end a hexagon hole 17 for receiving tool inserts 12th

Instead of the magnetic holder 30, a simple one can also be used Sleeve polygonal cross-section can be used if necessary with an axial locking device such as a spring washer, spring-loaded Holding ball or the like can be equipped.

In addition, Figures 7 to 11 show the use of the manual screwdriver just described for so-called Socket wrench inserts. These are socket wrenches, the one at one end with a polygonal drive pins are connectable. This polygonal Drive pin is also formed here by a tool shank 4, which, however, in contrast to the previous one Embodiment can be significantly shorter. This is because is based on the fact that precise guidance of the handle during work automatically from the socket wrench inserts is taken over.

Also offers a corresponding for socket wrench work short tool shank 4 the advantage of good accessibility even in tight spaces.

The possibility of correspondingly short tool shanks 4 use, but creates additional in the present case Space for a correspondingly large number of sockets, which will be discussed in the following.

According to the development according to Fig. 7 to 11 are in this Hand screwdriver in place of the twelve tool inserts according to the embodiment of Figure 1 to 6 in the interior 8 of booklet 2 still eleven socket wrench inserts 12 housed with associated drive shaft 4. The Socket wrench inserts 12 have six or different sizes twelve-sided coupling holes 41 for actuating this matching screw heads. By eliminating a long Tool shaft 4, the socket wrench inserts 12th at least partially over the entire inside length of the handle 11 can be accommodated in two rows.

It goes without saying that instead of the socket wrench inserts with six- or twelve-sided coupling holes 41 as well also socket wrench inserts with Torx or Pozidriv inserts can be used.

It should also be explicitly mentioned that instead of a short tool shank 4 also a long tool shank can be provided. In this case, however arranged in the longitudinal direction of the tool shank 4 Socket wrench inserts 12 are omitted or the corresponding ones Longitudinal dimensions of the handle would have to be increased accordingly.

In addition, it can be provided instead of a rigid one insert 6 used for connecting the tool shank also a creak-like or in the manner of a pinch roller freewheel trained connector to attach to the handle.

In addition to this, FIG. 12 shows a further exemplary embodiment the invention. In contrast to what has been said so far is in this embodiment at the top of the booklet 2 a transverse hole 43 is provided, which completely the handle enforced. This transverse hole 43 can be used as a hanging hole serve as well as the insertion hole for the Tool shank 4 so that a cross grip screwing tool is created. In this case, the insert 6 serves without additional Tool shank 4 as a holder for tool inserts 12. Another advantage of the hanging hole is given when this the cover 21 with an undercutting clip device locked to the rest of issue 2. Additionally shows Fig.12 that the outer total length 14 can also be less than the length of the tool shank 4. In this case the Tool shank 4 at least on one side from one end of the booklet 2 stand out. However, the protruding end is short, preferably not shorter than the entire outside length of the booklet 2 plus the free length of the insert 6, so that too in this embodiment, the requirement for compact design is fulfilled. As you can still see eighteen tool inserts 12 are included if this be arranged in two rows.

In the context of the present application, an is elongated under prismatic housing understood a handle-like housing, which is like a screwdriver in the palm of your hand supported by the thumb and fingers of one hand is enclosed. The cross section of the housing not limited to polygons, but especially surrounds also circular, oval, elliptical cross sections or these combined with polygon cross sections.

Reference symbol list:

1

Hand screwdriver

2nd

notebook

3rd

lower front

4th

Tool shank

5

casing

6

commitment

7

Insert length

8th

inner space

9

upper face

11

Inside length

12th

Tool insert, socket wrench insert

13

Insert recess

14

outer total length

15

Trough

16

Outside diameter or outside dimension

17th

Hexagon hole

18th

Face

19th

hole

20th

Approaches, round

21

cover

22

Outside surface

23

Holding ball

24th

claw

25th

score

26

Shaft piece

27

Ribs

28

Support section

30th

Magnetic holder

41

Coupling hole

42

Film hinge

43

Cross hole

125

Hinge axis

127

Window, opening

M

axial center

Claims (14)

1. Manual screwdriver (1) with a housing (5) with a cover (21) for storing a plurality of tool and/or socket wrench inserts (12) in preferably parallel insertion recesses (13) provided for this purpose and with a tool shaft (4) to receive the tool and/or socket wrench inserts (12), wherein the cover (21) and inner space (8) of the housing (5) extend substantially over the length (14) of the housing (5), in the inner space (8) in addition to the insertion recesses (13) a shaft recess is provided lying in the longitudinal direction of the housing (5), the tool shaft (4) is formed as a separate component which can be inserted into the shaft recess (15), wherein the housing (5), as a type of helve (2), has an outer shape which is an elongate prism and also ergonomically rounded, which can be supported in the ball of the hand in the manner of a screwdriver, wherein the outer diameter (16) of the helve (2) is thick in terms of being gripped in one hand and wherein in the housing (5) which is thick in terms of being gripped in the hand the insertion recesses (13) are disposed in individual radial planes and secantial to the longitudinal axis and wherein the length of the shaft recess (15) for the tool shaft (4) corresponds to the length of the inserted tool shaft (4).
2. Manual screwdriver according to claim 1, characterised in that the cover (21) is attached to the helve (2) by a hinge axis (125) extending in the longitudinal direction.
3. Manual screwdriver according to claim 1 or 2, characterised in that the cover (21) can be closed on the helve (2) by means of an elastically engaging claw (24).
4. Manual screwdriver according to one or more of claims 1 to 3, characterised in that, in the region of the axial middle, the helve (2) comprises a radial insertion device (6) to be fitted together with the tool shaft (4).
5. Manual screwdriver according to claim 1, characterised in that in order to couple the tool shaft (4) to the helve (2) metal inserts (6) are injected, pressed in or stuck in.
6. Manual screwdriver according to claim 1, characterised in that, on its upper transverse sides, the cover (21) comprises in each case a circular projection (20) which can be inserted into correspondingly provided holes (19) on the window which is left free for the cover (21) in the helve (2), wherein the cover (21) is preferably formed elastically in such a way that the projections engage by elastic extension of the cover (21).
7. Manual screwdriver according to claim 1, characterised in that the cover (21) is attached to the helve with a film hinge (42).
8. Manual screwdriver according to claim 1, characterised in that the tool shaft (4) comprises substantially the inner length (11) of the hollow space of the housing (5).
9. Manual screwdriver according to claim 1, characterised in that the tool shaft (4) is provided with a magnetic holding device (30) or with a mechanical clamp to hold the inserted tool or socket wrench insert (12).
10. Manual screwdriver according to claim 1, characterised in that the tool and/or socket wrench insets (12) have only their lower regions in the insertion recesses (13).
11. Manual screwdriver according to claim 1, characterised in that the end faces (3, 9) of the helve (2) are formed as crowned caps.
12. Manual screwdriver according to claim 1, characterised in that the cover (21) is provided on its inside with ribs (27) which, when the cover (21) is closed, are supported on opposite support parts (28) of the helve (2).
13. Manual screwdriver according to claim 1, characterised in that the helve (2) has a polygonal, for example, hexagonal shape and is, in particular, ergonomically rounded in the longitudinal direction or peripheral direction.
14. Manual screwdriver according to claim 1, characterised in that on the upper end of the helve (2) the handle is penetrated by a transverse hole (43), the outer diameter of which preferably makes it possible for the tool shaft (4) to be passed through.

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