CN1990187A

CN1990187A - Screwdriver with switchable magnetisation

Info

Publication number: CN1990187A
Application number: CNA2006101727038A
Authority: CN
Inventors: 贝蒂纳·施奈德; 马库斯·施奈德
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2005-12-30
Filing date: 2006-12-28
Publication date: 2007-07-04
Also published as: GB2434115B; GB2434115A; DE102005063187A1; GB0625740D0

Abstract

A screwdriver comprises a screwing tool 14, 34, 64 which, in its region of engagement with a screw, can be switchably magnetized to generate a magnetic force. Thereout, The mechanical manual screwdriver 10, 30 or a cordless screwdriver (50) can be manipulated quite comfortablely and reliably.

Description

Screwdriver with switchable magnetisation

Technical field

The present invention relates to a kind of screwing tool.

Background technology

Disclose the screwing tool that is magnetized, as screwdriver or screw joint (for example being used to " cutter head " with the screwdriver of battery), screw is protected in order to avoid non-ly during the process of screwing desirably come off in these screwing tools.At this, screw can remain adhered on the screwing tool that is magnetized usually reliably.But this screwing tool has following shortcoming: if with a driver bit that is magnetized screw threads is screwed in the hole, there is a magnetizable environment (for example housing wall of metal) on this next door, hole, then perhaps screw may be directed in the real hole hardly, because this screw remains adhered to by the described environment enduringly, if a single screw is taken out from a container with a large amount of other screws with a driver bit that is magnetized, then decide, have a plurality of other screws to adhere to more or less on the intensity of magnetization.This needs manually to intervene and slowed down thus workflow.If a screw only is directed to also " putting and put " there in the hole of its setting of workpiece with a driver bit that is magnetized, but final just should be tightened (for example in order when treating, to avoid distortion) after adjusting part to be screwed by a plurality of screw fixed head, then this screw on purpose can not be unclamped from driver bit, because this screw is adhering to more firmly on the driver bit than on workpiece.Put this screw if unclamp a screw and then will on purpose put with a driver bit that is magnetized, then this only by means of a suitable scratch seamed edge or have only manually and just can realize, has slowed down workflow mostly thus.If a screw is assemblied in one to magnetizing responsive structural member next door, then under before being used for the situation of not harsh assembling, instrument must change this instrument with a driver bit that is magnetized.Perhaps, this replacing passes out of mind, and may cause damage on the structural member of described sensitivity thus.

Summary of the invention

According to the present invention, a kind of screwdriver has been proposed, having one is used for taking movingly screwing tool with screw, this screwing tool especially is configured to blade or is configured to preferred removable cutter head, wherein, this screwing tool switchably magnetizes in the mating area of screw to be screwed the electronic installation of can be by corresponding device thereof such as permanent magnet and/or electromagnet and/or being used to produce magnetic force in its configuration.

The present invention relates to a kind of screwdriver or a kind of joint of screwing, its intensity of magnetization can be controlled/regulate, and for example magnetizes by on/off.This screwdriver can especially reliably, fast and cosily be regulated and handle by means of one-handed performance.Thus, screw can on purpose fixedly be maintained and is placed between the other screw can on purpose putting under the situation of not using other device.In addition, screw can be inserted in the hole of its setting reliably and also can need not under the situation of not using other device and fixingly just unclamp from the screwdriver tip.Under magnetizable environment, can reduce the screwdriver tip intensity of magnetization in this degree ground, make screw just be held, but can ignore the influence of environment.By reducing the intensity of magnetization, screw work and also can in the environment of magnetosensitive sense, under the situation of not changing instrument, carry out.Can in a large amount of other screws, one by one take out screw by reducing the intensity of magnetization, and need not to use other device by the screwdriver tip.

Advantageously, the magnetization of described device is optionally connected and/or is turn-offed.

Advantageously, the magnetization of described device can be conditioned byer force or be more weak.

Description of drawings

By affiliated explanation the present invention is described in more detail by means of an embodiment below.Accompanying drawing is represented:

But the magnetized manual screwdriver of electromagnetism of Fig. 1;

But the manual screwdriver of a permanent magnet magnetization of Fig. 2;

But the screwdriver of a magnetized band battery of electromagnetism of Fig. 3.

The specific embodiment

Fig. 1 shows a mechanical type screwdriver 10, and this screwdriver has a blade 14 that is provided with handle 12.This handle 12 preferably holds a battery 16 and carries a switch 18 in inside.Can activate a magnetizing coil 20 that is combined in the blade 14 by means of switch 18, its mode is to make magnetizing coil 20 energisings and electromagnetization is switched by closed path loop 22.Battery 16 constitutes current source.Under the situation that electric current flows through, set up magnetic field in magnetizing coil 20 inside, by this magnetic field screw 24 is fixed at least on the tip 26 of blade 14 and maintains or hold.In a unshowned embodiment of the present invention, magnetization produces by electronic installation.

Fig. 2 shows a magnetizable screwdriver 30, this screwdriver has a blade 34 that is provided with not magnetizable handle 32, this magnetization is mechanically switched, wherein, by gap 36 closures are magnetized between permanent magnet 42 and magnetizable bar 44, this bar constitutes the blade 34 of screwdriver 30 simultaneously.36 when closed in the gap, and this bar 44 also has magnetic and on the tip 36 of blade 34 suction is applied on the screw at least thus.When release-push 38, magnetizable bar 44 and permanent magnet 42 separate again, gap 36 open and the tip 36 of blade 34 on magnetic force be reduced to minimum degree or be reduced to zero.In another unshowned embodiment deformation program, the blade of combination is configured to magnetizable.

Screwdriver 30 according to Fig. 2 can be by simple device conversion, for example by one suitable columned, especially be configured to revolving meber, be used to not have the plastics blank that is fixed on the blade 34 with relatively rotating, drilling has the guider of two different-diameters on its whole length in this plastics blank.Insert backspring 46 and permanent magnet 42 from the handle end, go into a metallic rod with screwdriver tip from the blade side bonds.End cover with button can be by on bonding.

Fig. 3 illustrates the screwdriver 50 of a band battery, the screwdriver of this band battery has a housing 52, and this housing holds a battery 54, one and has that the motor 56 of motor switch 58 and transmission device 60 and one are magnetizable to be used to receive the clamping dop 62 of screwing cutter head 64.The screwdriver 50 of this band battery also is provided with a magnetization switch that can manually operatedly have a holddown spring 68 66, a magnetizing coil 70 and a magnetizable bar 72.Magnetizable bar 72 is pressed in by holddown spring 68 and clamps screwing on the cutter head 64 and therefore being operated to magnetize when being connected with magnetizing coil 70 with battery 76 at magnetization switch 66 in the dop 62 and screw cutter head 64.Thus, screwing cutter head 64 also has magnetic and suction is applied on the metallic screw to the magnetosensitive sense.Connect (for example sliding-contact) suitably with magnetizing coil 70 by current supply device, motor in service after operating motor switch 58 magnetization also keep or also can turn-off when needed.The magnetizing assembly of the screwdriver 50 of band battery is in housing 52.

In the mechanical type screwdriver 10,30 according to Fig. 1 or Fig. 2, the intensity of magnetization for example can be regulated or switching by means of the suitable device in the handle or in the blade.Be screwed at the electric rotary according to Fig. 3 and put in 50, the intensity of magnetization for example is arranged on switch 58 next doors that are used to start rotation process as suitable device.All can realize one-handed performance in all cases thus.At this, magnetization can electricity ground (for example Fig. 1) or mechanically (for example Fig. 2) carry out.

Claims

1. screwdriver (10,30,50), having one is used for taking movingly screwing tool with screw, this screwing tool especially is configured to blade (14,34) or is configured to preferred removable cutter head (64), it is characterized in that: this screwing tool disposes at it can be by corresponding device thereof such as permanent magnet and/or electromagnet (42 in mating area of giving screw to be screwed, 20,70) and/or the electronic installation that is used to produce magnetic force switchably magnetize.

2. according to the screwdriver of claim 1, it is characterized in that: the magnetization of described device is optionally connected and/or is turn-offed.

3. according to the screwdriver of claim 1 or 2, it is characterized in that: the magnetization of described device can be conditioned byer force or be more weak.