EP2698231B1 - Screwdriver handle with storage for screwdriver inserts - Google Patents

Description

The invention relates to a screwdriver handle with a magazine for screwdriver bits (bits) according to the preamble of patent claim 1.

It is known to form a screwdriver with a handle having a tool shank on which interchangeable screwdriver bits are attachable. These screwdriver bits are commonly referred to as bits. This makes it possible to exercise several turning functions with a handle. In order to have the required number of bits available, magazines are used in which the bits not currently needed are kept in order to be available on demand.

From the EP 0 674 567 B1 a screwdriver handle of the type mentioned is known in which the magazine is formed for the bits in the screwdriver handle. For this purpose, a grip body of the handle has a cylindrical cavity in which a shaft is coaxially arranged. On this shaft, a sleeve is axially displaceable, on the outer circumference of which the bits can be clamped. The sleeve with the bits can be slid on the shaft to a storage position within the cavity. If the sleeve is pulled out of the cavity into a removal position, the bits are accessible laterally from the sleeve and can be removed or inserted. The bits are held on the sleeve in spring clips, so that they rest axially parallel to the outer circumference of the sleeve. In order to accommodate the largest possible number of bits in the magazine, the bits are in the circumferential direction with arranged at low mutual angular distance, whereby the detection of the bits during removal and insertion is difficult.

A screwdriver with recordings for bits reveal the pamphlets US Pat. No. 7,395,739 B1 and US 2005/028267 A1 ,

The invention is based on the object, a screwdriver handle with a magazine for bits in such a way that with the same capacity recording the bits in the removal position can be easily removed and used.

This object is achieved by a screwdriver handle with the features of claim 1.

Advantageous embodiments of the invention are specified in the subclaims.

In the screwdriver handle according to the invention an inner cylindrical cavity of the handle body serves to receive the bits. The bits can be inserted into a bit holder which can be pushed out of the cavity of the handle body into a removal position by means of a sleeve which can be axially displaced on an inner shaft. The bit holder has a seated at the inner end of the sleeve bit receptacle, in which the bits are used with their end. In the storage position, the bit holder is thus at the inner front end of the cavity and the bits lie axially parallel to the outer circumference of the sleeve. In this case, the bits can be arranged with minimum mutual angular distance, so that an optimal utilization of the cavity for the reception of the bits is achieved. If the sleeve is moved out of the handle into the removal position, the free ends of the bits seated in the bit holder are spread outward from the sleeve. Thereby This results in both a radial distance between the circumference of the sleeve and the free end of the bits as well as a greater mutual angular distance between the free ends of the bits. The user can therefore comfortably grasp the free ends of the bits with his fingers and remove them from the magazine or insert them into the magazine.

In order to spread the bits into the removal position, the bit holder is preferably positively guided in the cavity. The spreading of the bits is thereby inevitably, when the bit holder is pushed into the removal position. The positive guide can be a mechanical gate or cam guide, which pulls the bit holder at the end of the axial displacement path in the removal position to the outside or pushes. Preferably, the positive guidance is effected by a resilient bias which holds the bits in the bit receptacle against the inner wall of the cavity and pivots the bits in the bit receptacle outwardly as soon as the bits exit the cavity and are no longer radially supported by the inner wall of the cavity become.

The bit holder has receiving pockets, which are arranged distributed over the circumference of the sleeve and into which the bits are axially inserted. The receiving pockets are pivotally mounted on the sleeve and are pivoted outward under spring tension. The spring tension can be z. B. caused by an O-ring enclosing the pivot lever of the receiving pockets.

At the rear end of the sleeve, a cap is arranged, which closes the cavity of the handle body in the storage position and is lockable in this position. For this purpose, for example, on this cap, a locking element be arranged, which cooperates in the storage position with a arranged at the rear end of the shaft locking element. The locking elements can in particular be a spring-loaded latching hook and a corresponding locking lug. In another embodiment, the cap may be locked with locking means at the rear end of the handle body. For this purpose, for example, on the outside of the handle body latching arms are mounted, which engage spring-loaded in the storage position in an outer circumferential groove of the cap and can be pivoted against the spring force from the circumferential groove to release the cap. Other locking options are within the skill of the art.

Figur 1

einen Schraubendrehergriff in der Aufbewahrungsposition,

Figur 2

den Schraubendrehergriff in der Entnahmeposition,

Figur 3

einen Axialschnitt des Schraubendrehers in der Aufbewahrungsposition,

Figur 4

eine vergrößerte Detaildarstellung der Figur 3,

Figur 5

einen Axialschnitt des Schraubendrehergriffes in der Entnahmeposition,

Figur 6

vergrößerte Detaildarstellungen der Figur 5,

Figur 7

eine perspektivische Detailansicht des aufgeschnittenen Schraubendrehergriffes in der Aufbewahrungsposition,

Figur 8

eine perspektivische Detailansicht des aufgeschnittenen Schraubendrehergriffes in der Entnahmeposition,

Figur 9

einen Teller der Bithalterung des Schraubendrehergriffes in verschiedenen Ansichten,

Figur 10

eine Bitaufnahme der Bithalterung des Schraubendrehergriffes in verschiedenen Ansichten,

Figur 11

eine abgewandelte Ausführung des Schraubendrehers in einer Figur 3 entsprechenden Darstellung und

Figur 12

eine Figur 5 entsprechende Darstellung dieser Ausführung.

In the following the invention will be explained in more detail with reference to embodiments shown in the drawing. Show it:

FIG. 1

a screwdriver handle in the storage position,

FIG. 2

the screwdriver handle in the removal position,

FIG. 3

an axial section of the screwdriver in the storage position,

FIG. 4

an enlarged detail of the FIG. 3 .

FIG. 5

an axial section of the screwdriver handle in the removal position,

FIG. 6

enlarged detail of the FIG. 5 .

FIG. 7

a detailed perspective view of the cut screwdriver handle in the storage position,

FIG. 8

a detailed perspective view of the cut screwdriver handle in the removal position,

FIG. 9

a plate of the bit holder of the screwdriver handle in different views,

FIG. 10

a bit holder of the bit holder of the screwdriver handle in different views,

FIG. 11

a modified version of the screwdriver in one FIG. 3 corresponding representation and

FIG. 12

a FIG. 5 corresponding representation of this embodiment.

FIG. 1 shows a screwdriver handle with an elongate handle body 10, in the axial front end side of a tool shank 12 is inserted. The tool shaft 12 has at its front free end a chuck 14, in which interchangeable screwdriver bits, so-called bits 16 are used with their drive end. The handle body 10 serves as a magazine for the bits 16 and is closed at its rear axial end side by a cap 18.

FIG. 2 shows the screwdriver handle in its removal position. In this removal position, the bits 16 are pushed back out of the handle body 10, so that they can be removed or used.

The structure of the screwdriver handle is in the FIGS. 3 to 10 shown in detail.

The handle body 10 is a plastic injection molded part, which is manufactured in three injection molding steps. In a front end piece 10.1 of the tool shank 12 is cast with its rear end. The end piece 10.1 is followed by an axially elongate operating portion 10.2, which the user takes to handle the screwdriver. The actuating portion 10.2 is preferably provided with an outer coating 10.3, which improves the feel of the handle body 10. In the handle body 10, an axially elongated cavity 20 is formed, which has the shape of a coaxial with the handle body 10 right circular cylinder. The cavity 20 is closed at its front inner end by the front end piece 10.1 of the handle body 10. The peripheral surface of the cavity 20 is formed by the operating portion 10.2 of the handle body 10. At the rear end face of the handle body 10, the cavity 20 is open and can be closed by the cap 18.

Coaxially in the cavity 20, a shaft 22 is arranged, the z. B. is formed as a metal rod. The shaft 22 is cast with its inner front end into the end piece 10.1 of the handle body 10 and aligned axially with the tool shaft 12. The length of the shaft 22 substantially corresponds to the axial length of the cavity 20, so that the rear end of the shaft 22 approximately with the open rear end of the cavity 20 coincides. On the shaft 22, a sleeve 24 is guided axially displaceably. The sleeve 24 is preferably formed by a metal tube whose inner cross-section substantially corresponds to the outer cross-section of the shank 22. The cap 18 is concentrically mounted on the rear end of the sleeve 24, for. B. as a plastic part on the rear end of the sleeve 24 sprayed. To close the screwdriver handle in the in the FIGS. 1 and 3 shown storage position the cap 18 is lockable to the handle body 10. For this purpose, a radially projecting latching lug 26 is attached to the free rear end of the shaft 22. In the cap 18 a diametrically movable in the transverse direction slide 28 is mounted. The slide 28 carries on its side facing the cavity 20 inside a latching hook 30 which engages behind the latching lug 26 of the shaft 22 in the storage position to hold the cap 18 to the handle body 10. The slider 28 is acted upon by a helical compression spring 32 in the locking position. If the cap 18 with the sleeve 24 in the in the FIGS. 1 and 3 pushed shown storage position, the latching hook 30 slides over the locking lug 26, wherein inlet slopes cause the slide 28 is moved against the force of the helical compression spring 32. As soon as the latching hook 30 engages behind the latching lug 26, the helical compression spring 32 pushes the slider 28 back, so that the latching hook 30 engages behind the latching lug 26. To open the cap 18, the user pushes the slider 28 against the force of the helical compression spring 32 to the side, so that the latching hook 30 is released in the radial direction of the locking lug 26 and the cap 18 can be detached from the handle body 10.

At the front inner end of the sleeve 24, a bit holder is mounted, which holds the bits 16 on the sleeve 24, so that the bits 16 together with the sleeve 24 into the cavity 20 into the storage position and out of the cavity 20 into the removal position can be moved. The bit holder has a plate 34 which is in FIG. 9 shown as a single item, and a 36 bit recording included in FIG. 10 shown as a single item.

The bit holder 36 and the plate 34 are plastic injection molded parts. The bit holder 36 has a socket 38, which sits firmly on the front end of the sleeve 24. The plate 34 has the shape of a flat annular disk on which a coaxial sleeve 40 is formed. The plate 34 is seated with its sleeve 40 fixed to the socket 38 of the bit holder 36, so that the plate 34 is fixedly connected to the front end of the sleeve 24. The outer diameter of the plate 34 substantially corresponds to the inner diameter of the cavity 20, so that the plate 34 is freely displaceable axially in the cavity 20 together with the sleeve 24. Between the plate 34 and the front end piece 10.1 of the handle body 10, a helical compression spring 42 is inserted. The helical compression spring 42 is centered on a shaft 22 surrounding pin 10 of the end piece. With its rear end, the helical compression spring 42 coaxially surrounds the sleeve 40 of the plate 34 and is supported on the front side of the plate 34. In the in the FIGS. 3 and 4 shown storage position, the sleeve 24 is fully inserted with the plate 34 in the cavity 20, whereby the helical compression spring 42 is compressed and tensioned. The sleeve 24 is held against the force of the tensioned helical compression spring 42 in that the cap 18 is locked by means of the slider 28 on the shaft 22. If the locking of the cap 18 is released, then the helical compression spring 42 presses the plate 34 with the sleeve 24 axially in the in the FIGS. 4 and 5 shown removal position.

The bit holder 36 has a number of receiving pockets 44 corresponding to the number of bits 16 to be picked up. The receiving pockets 44 are arranged at the same mutual angular distance around the circumference of the bush 38 around. In the illustrated embodiment, the magazine for receiving six bits 16 is configured so that six receiving pockets 44 are present.

The receiving pockets 44 are in the form of axially parallel to the sleeve 38 cylinders which are open at its rear and have an inner cross section corresponding to the cross section of the drive end of the bits 16, z. B. is designed as a hexagon. At the side facing the bushing 38, the jacket of the receiving pockets 44 is open. If a bit 16 is inserted with its drive end in a receiving pocket 44, the receiving pocket 44 surrounds the bit 16 over more than half the circumference, but not completely. In the illustrated embodiment, the receiving pocket 44 encloses the end of the bit 16 at five side surfaces of the hexagonal cross-section. This makes it possible to form the receiving pockets 44 such that the drive end of the inserted bit 16 is held in the receiving pocket 55 under frictional clamping. At the front axial end face, the receiving pockets 44 have a bottom 46. With this bottom 46, the receiving pockets 44 are each connected to the seated on the sleeve 24 socket 38. In this case, the connection between the bottom 46 of the receiving pockets 44 and the sleeve 38 is formed in each case as a film hinge, so that the receiving pockets 44 can be pivoted with their rear open ends of the sleeve 38 and thus of the sleeve 24. At the bottom 46 of the receiving pockets 44, a pivot lever 48 is formed in each case at the front thereof. The pivot levers 48 protrude substantially axially from the bottom 46 and are angled outwardly at their free ends. In the mounted state, the bit holder 36 sits on the cavity 20 facing the rear surface of the plate 34. The pivot lever 48 of the bit holder 36 engage axially through correspondingly arranged openings 50 of the plate 34 therethrough. In the illustrated embodiment with six receiving pockets 44, the plate 34 accordingly six apertures 50 in the same mutual angular distance, through which the pivot lever 48 of the receiving pockets 44 pass through. On the side facing away from the bit holder 36 front side of the plate 34, an O-ring 52 is arranged coaxially with the bushes 38 and 40, which wraps around the over the plate 34 protruding pivot lever 48 of all receiving pockets 44. The O-ring 52 pulls due to its elastic bias the free ends of the pivot lever 48 against the sleeve 40. Since the pivot lever 48 are supported in the apertures 50 on the plate 34, the elastic bias of the pivot lever 48 causes a bias of the receiving pockets 44 in Direction of pivoting away from the sleeve 24th

If the locking of the cap 18 is released, then the helical compression spring 42 pushes the plate 34 with the bit holder 36 against the open end of the cavity 20, so that the bit holder 36 in the in the FIGS. 5 and 6 shown removal position passes. The receiving pockets 44 of the bit holder 36 come out in this removal position from the open rear end of the cavity 20 so far that their rear ends can be pivoted under the action of the O-ring 52 of the sleeve 24. The receiving pockets 44 are splayed into this removal position at an angle relative to the sleeve 24, which also increases the mutual angular distance of the rear open ends of the receiving pockets 44. In this position, therefore, bits 16 can be conveniently removed from the receiving pockets 44 and bits 16 can be inserted into free receiving pockets 44.

If the sleeve 24 is inserted by axial pressure on the cap 18 against the force of the helical compression spring 42 in the cavity 20 of the handle body 10, so the bit holder 36 moves in the cavity to the inside. The receiving pockets 44 with the inserted bits 16 thereby reach the area of the cylindrical Inner wall of the cavity 20. The receiving pockets 44 with the bits 16 are thereby pressed against the elastic force of the O-ring 52 against the sleeve 24 so that they rest axially parallel to the outer circumference of the sleeve 24. If the sleeve 24 is fully inserted into the cavity 20, the cap 18 closes the open end of the cavity 20 and is locked by means of the slider 28 to the latching lug 26 of the shaft 22. The screwdriver handle is thus in the in the FIGS. 3 and 4 shown storage position.

In the FIGS. 11 and 12 is a modified version of the screwdriver shown. This modified version is essentially the same with reference to the Figures 1-10 described embodiment, so that the above description also for the FIGS. 11 and 12 applies. It will be in the FIGS. 11 and 12 Therefore, the same reference numerals used.

In contrast to the embodiment of Figures 1-10 is in the modified version of FIGS. 11 and 12 the cap 18 closing the open rear end of the cavity 20 of the handle body 10 can not be locked on the shaft 22 in the storage position, but on the rear end of the handle body 10. For this purpose, the cap 18 has a peripheral edge adjacent to the rear end of the handle body 10 Circumferential groove 54. On the outer circumference of the rear end of the handle body 10, two locking levers 56 are arranged diametrically opposite one another. The latching lever 56 extend parallel to the axis and are received in corresponding recesses of the peripheral surface of the handle body 10, so that the outer surface of the latching lever 56 is substantially flush in the outer surface of the handle body 10 inserts. The locking lever 56 are pivotable as two-armed lever in the respective recess stored. For pivotal mounting serve on the two longitudinal sides of the locking lever 56 integrally formed spherical caps, which engage in corresponding spherical bearing shells, which are formed on the longitudinal sides of the recess. The locking lever 56 are simple injection molded parts and are snapped into the bearing shells during assembly with the spherical caps. At the over the rear edge of the handle body 10 protruding one arm of the locking lever 56, a latching hook 58 is formed, which is directed against the central axis of the handle body 10. Between the directed against the front end of the tool other arm of the two-armed latching lever 56 and the bottom of the recess of the handle body 10, a conical pressure spring 60 is inserted. The conical compression spring 60 acts on the two-armed latching lever 56 in the sense that the latching hook 58 is pivoted inwardly in the direction of the central axis of the handle body 10.

If the bit magazine placed in the storage position, the sleeve 24 is inserted with the latched onto the rear end of the sleeve 24 cap 18 into the cavity 20 of the handle body 10. The cap 18 sits down with its front peripheral edge on the rear peripheral edge of the handle body 10, wherein outer inlet slopes at the peripheral edge of the cap 18, the locking lever 56 pivot against the force of the conical compression spring 60 to the outside. The latching hooks 58 thereby slide on the outer periphery of the cap 18 and engage under the action of the conical compression spring 60 in the circumferential groove 54 of the cap 18 a. The cap 18 is thereby locked on the rear end of the handle body 10. To open the magazine, the user presses with two fingers diametrically on the latching hooks 58 opposite arms of the locking lever 56. As a result, the conical compression springs 60 are compressed, the locking lever 56 pivoted against the force of the conical compression springs 60 and the latching hooks 58 from the circumferential groove 54 lifted out. The cap 18 is thereby released and the sleeve 24 with the bit holder can be pushed out of the grip body 10 by the helical compression spring 42.

Of course, instead of two diametrically arranged locking levers 56, only a single latching lever 56 or even more than two latching levers 56 may be provided. However, two diametrically arranged locking lever 56 have the advantage of comfortable operation by two fingers that engage diametrically on the handle body.

Instead of locking by locking lever 56, other means for locking the cap 18 to the handle body 10 are possible. For example, the cap 18 can also be locked in the manner of a bayonet lock on the rear end of the handle body. The cap 18 is thereby inserted into the open end of the handle body 10 and locked by twisting.

Likewise, it is possible to attach 10 differently polarized magnets in staggered angular positions at the adjoining edges of the cap 18 and the open end of the handle body. In a rotational position of the cap 18 while opposite magnetic poles of cap 18 and handle body 10 come to cover, so that the cap 18 is magnetically held in the locking position. If the cap 18 is rotated from this locking position, then the same magnetic poles come to cover, which repel and press the cap 18 from the end of the handle body 10 in the open position.

LIST OF REFERENCE NUMBERS

10

handle

10.1

front tail

10.2

actuating section

10.3

coating

12

tool shank

14

feed

16

bits

18

cap

20

cavity

22

shaft

24

shell

26

locking lug

28

pusher

30

latch hook

32

Helical compression spring

34

Plate

36

bitholder

38

Socket from Bitaufnahme

40

Bush of plate

42

Helical compression spring

44

receiving pockets

46

ground

48

pivoting lever

50

breakthroughs

52

O-ring

54

circumferential groove

56

locking lever

58

latch hook

60

Conical compression spring

Claims (7)

1. Screwdriver handle with a magazine for screwdriver inserts (bits),
   with a handle body (10) having a front end and a rear end, wherein a tool shank (12) is arranged on the handle body (10),
   with a cylindrical cavity (20) which is formed coaxially in the handle body (10) and at its front inner face is closed by the handle body (10) and the rear end of which is open at the rear end of the handle body (10),
   with a shank (22) which is arranged coaxially in the cavity (20) and the front end of which is attached at the inner end face of the cavity (20) in the handle body (10) and which extends to the open rear end of the cavity (20),
   with a sleeve (24) guided axially displaceably along the shank (22),
   with a cap (18) sitting on the rear end of the sleeve (24), and
   with a bit holder which is arranged on the outer periphery of the sleeve (24) and in which several bits (16) can be inserted distributed over the periphery,
   wherein in a storage position, the sleeve (24) on the shank (22) is retracted into the cavity (20), the bit holder is situated in the cavity (20) and the cap (18) closes the open rear end of the cavity (20), and
   wherein in an extraction position, the sleeve (24) on the shank (22) is moved out of the cavity (20) so far that the bit holder is exposed for lateral extraction and insertion of the bits (16),
   wherein the bit holder has a bit receiver (36) which sits on the front inner end of the sleeve (24) and in which the bits (16) can be inserted with their end,
   wherein the bit receiver (36) has receiver pockets (44) which are distributed over the periphery and in each of which a bit (16) can be axially inserted,
   characterised in that
   the bit receiver (36) holds the bits (16) in the storage position lying axially parallel on the sleeve (24), and in the extraction position with their free ends spread away from the sleeve (24),
   wherein the receiver pockets (44) are held lying on the sleeve (24) in the cavity (20) and on emergence from the cavity (20) they pivot away from the sleeve (24), the receiver pockets (44) are arranged pivotably on the sleeve (24) and are pretensioned elastically in the direction of pivoting out, and the receiver pockets (44) are mounted pivotably in the sleeve (24) by means of a film hinge and are pretensioned by a spring element in the direction of pivoting out.
2. Screwdriver handle according to claim 1, characterised in that the bit receiver (36) is force-guided in the cavity (20).
3. Screwdriver handle according to claim 1 or 2, characterised in that the receiver pockets (44) have a pivot lever (48), and that the spring element is an O-ring (52) which surrounds the pivot levers (48) of all receiver pockets (44) coaxially to the sleeve (24).
4. Screwdriver handle according to claim 3, characterised in that the pivot levers (48) extend through openings (50) of a plate (34) sitting on the sleeve (24) and are supported on the plate (34) in these openings (50).
5. Screwdriver handle according to any of the preceding claims, characterised in that in the storage position, the cap (18) is releasably locked on the rear end of the handle.
6. Screwdriver handle according to claim 5, characterised in that the cap (18) has a first locking element (28, 30) which in the storage position cooperates with a second locking element (26) arranged on the rear end of the shank (22).
7. Screwdriver handle according to claim 5, characterised in that on its peripheral edge, the cap (18) has locking means (54) which in the storage position cooperate with locking means (56, 58, 60) arranged on the rear end of the handle body (10).

Images