Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
  • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
  • B25F5/02—Construction of casings, bodies or handles
  • B25F5/021—Construction of casings, bodies or handles with guiding devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
  • B25B23/18—Devices for illuminating the head of the screw or the nut

Definitions

• the invention relates to a hand tool, in particular an electrically operated hand tool such as a cordless screwdriver or cordless drill, according to the preamble of claim 1.
• Such a cordless screwdriver or drill is described in US Pat. No. 7,185,998 B2, which has an electric drive motor for driving a tool holder in a motor housing. Approximately perpendicular to the motor housing extends a handle housing, at the lower end of a battery pack is arranged to power. In the transition region between the battery pack and the handle housing a lighting device is arranged, which comprises a light source with an upstream lens, via which a light beam lying directly in front of the tool holder
• Working field is sent out. Due to the relatively large distance between the light source and the working field, the light source must have a relatively high light intensity.
• the luminous means is located at the front region of the motor housing in the immediate vicinity of the tool holder.
• the disadvantage here is the relatively large height, which arises due to the angular positioning of the lamp relative to the tool axis.
• Transition region between the motor housing and the handle housing positioned switch pushers for actuating the electrical Drive motor can not be operated in an optimal, ergonomic manner due to the directly upstream arrangement of the bulb.
• the invention is based on the object with simple constructive measures, the working field of a
• Handheld power tool to illuminate optimally without limitation of ergonomics.
• the hand tool according to the invention which is in particular an electrically operated hand tool such as a cordless screwdriver, cordless drill, battery impact wrench or cordless percussion drill, has in a housing a switch assembly for actuating or adjusting a drive motor.
• the switch assembly is composed of a switch and a switch trigger.
• a lighting device for working field illumination is provided which comprises a light source for generating a light beam in the direction of the working field.
• the movable to the housing switch lever for actuating or adjusting the drive motor forms a part of the lighting device, in such a way that emitted by the light beam from the or on the switch lever for
• the switch handle is therefore in addition to its original function of
• the switch handle is part of the lighting device, the Illuminants are placed in close proximity to the switch, so that it is no longer necessary to position the light source at a greater distance to the switch for ergonomic reasons.
• the light source can be designed to be small, since a relatively close positioning on the working field and thus the use of relatively low light intensities is possible.
• the height of the light source is reduced, since an arrangement of the illuminant with only a small angular deviation relative to the tool axis of the power tool or an axially parallel arrangement is possible; the switch trigger, which lies in the beam path of the light beam emanating from the light source, ensures a distribution or deflection of the light beams in the direction of the working field to be illuminated.
• the light source is arranged outside of the switch trigger in the housing and the light beams of the light source are directed to the switch trigger, which plays a visual forwarding function for the light rays striking it.
• the switch trigger at least partially consists of a transparent material, so that the light rays emitted by the light source switch in
• the switch Penetrate the direction of the working field to be illuminated. In this way, a bundled, incident on the switch light beam can be focused, deflected or possibly fanned out in the manner of a lens to achieve a desired illumination effect.
• it is also possible to reflect the incident light beam on the switch on the surface of the switch by the switch is provided for example with a mirrored surface or a polished surface, which allows a reflection.
• the geometry of the switch can also be prepared for a desired optical effect, for example, such that the switch for bundling or - A -
• the geometry of the switch can be prepared here accordingly both in the case of a transparent material, through which the light passes, as well as in the case of a reflection on the surface.
• This design is also rugged because the lamp inside the switch is protected from dirt and damage.
• the lighting means is integrated into the interior of the switch trigger.
• This design is particularly space-saving, since no additional installation space for the light source must be kept.
• the switch trigger either an opening for the exit of the light rays is emitted, which are emitted by the lamp, or the wall of the executed as a hollow body switch pusher consists of a transparent material through which the light rays pass.
• the switch trigger which is part of the lighting device, is a reversing switch switch with which the direction of rotation of the drive motor is set or reversed.
• the direction of rotation reversal switch pusher usually extends in the transverse direction through the motor or gear housing of the power tool and is depending on the currently set rotational direction on one of the two sides of the housing over.
• Reverse direction switch pushbutton participates in the illumination of the working field.
• each one is advantageously on each side of the housing each one
• Illuminant arranged, which is activated with appropriate adjustment of the reversing switch trigger and the protruding part of the reversing switch push-button illuminated.
• Reverse direction switch trigger each a light source can be provided which protrudes laterally at a supernatant of the corresponding side of the switch trigger on the side of the housing and thus enters a line directly to the working area to be illuminated. It is also possible, however, a design with only a single, bulbs fixed to the housing in the interior of the reversing switch pushbutton, the light emanating from the bulb is passed over the currently protruding side of the reversing switch push-button towards working field.
• Direction of rotation reversing switch trigger can also be another switch trigger component of the lighting device, such as the operating switch, via which the drive motor is put into operation and the speed of the drive motor is set. Also contemplated is a power-on lockout button for the motor switch or a power-on lockout button for the motor power switch.
• Fig. 1 shows a section through a hand tool, which is designed as a cordless drill or screwdriver, wherein adjacent to a
• Direction of rotation reversal switch trigger a light source is arranged, meet the light rays on the reversing switch push-button and are forwarded from there in the direction of working field,
• Fig. 2 shows the hand tool in a front view.
• the same components are provided with the same reference numerals.
• the hand tool 1 shown in Fig. 1 comprises a housing 2, consisting of a motor housing 3 and a directed approximately perpendicular to the motor housing 3 handle housing 4, wherein motor housing 3 and handle housing 4 are optionally made in one piece or as separate components.
• a motor housing 3 In the motor housing 3, an electric drive motor 5 and also a gear 6 is received, which is actuated by the drive motor 5 and via which the drive movement is transmitted to a spindle or tool holder 7 for receiving a tool.
• the transmission 6 is, for example, a planetary gear to implement the high engine speed in the lower speed of the tool holder.
• the drive motor 5 is operated via a switch trigger 8 which can be moved relative to the housing, which is located on the handle housing 4, wherein the degree of actuation of the switch trigger 8, which acts internally on a switch 9, the speed of the drive motor is set. Furthermore, a relative to the housing movable reversing switch trigger 10 is disposed in the transition between the motor housing 3 and the handle housing 4 on the underside of the housing, which is transverse to horritg in the transverse direction. Motor axis extends and depending on the current position on one of the two sides of the housing protrudes. The direction of rotation reversal switch push-button is used to actuate a reversing direction switch which adjusts the direction of rotation of the drive motor.
• a replaceable battery pack 11 which serves to power the electric drive motor 5.
• a light source 12 is provided, which in the Area of the handle housing immediately below the motor housing adjacent to the reversing direction switch lever 10 is arranged.
• the light-emitting means 12 has a light source, for example a light bulb, an LED or OLED or an SMD LED.
• the bulb 12 is based on the working field 13 behind and at a distance from
• the invention is part of a lighting device for illuminating the working field 13. Accordingly, this lighting device also includes the light bulb 12 as well as the
• Direction of rotation reversing switch pusher 10 which directs the light rays emitted by the bulb 12 in the direction of the working field 13.
• the reversing switch trigger 10 is for this purpose at least in its lateral, protruding from the housing areas of a transparent material such as PMMA, PC or PS.
• the emanating from the light bulb 12 light rays can penetrate the transparent wall of the reversing direction switch lever 10, wherein by suitable additional measures such as a corresponding curvature in the wall of the
• Reverse direction switch trigger a fanning effect or a bundling effect can be generated in the manner of a lens.
• the surface of the direction of rotation reversal switch pusher 10 located inside the housing reflects the incident light beams of the luminous means 12.
• the surface of the reversing switch trigger 10 is provided for example partially or completely with a coating, in particular mirrored, or polished, in order to achieve in this way a reflection of the incident light beams.
• the bulb 12 is in the interior of the formed as a hollow body reversing switch trigger 10 integrated.
• This design has the advantage of a particularly compact design. Here comes both a version with only a single bulb 12 in
• Direction of rotation reversing switch pusher 10 into consideration as well as a design with at least two light sources, which are preferably arranged in the side region of the reversing switch push-button.
• Direction of rotation reversal switch trigger 10 is made transparent in this embodiment, so that the light rays generated by the light source in the direction of
• Working field 13 can escape. Optionally, however, an exit opening for the light rays in the wall of the reversing direction switch trigger comes into consideration.
• the direction of rotation reversal switch trigger 10 projects laterally over the grip housing 4, so that a deflection of the light beams generated by the illuminant in the direction of the working field 13 from both positions of the reversing switch trigger 10 is possible.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=41254625

Family Applications (1)

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Families Citing this family (16)

Family Cites Families (7)

• 2008
  • 2008-09-29 DE DE102008042426A patent/DE102008042426A1/de not_active Withdrawn
• 2009
  • 2009-08-12 CN CN2009801384932A patent/CN102164716A/zh active Pending
  • 2009-08-12 AT AT09781745T patent/ATE556822T1/de active
  • 2009-08-12 US US13/119,406 patent/US8529084B2/en not_active Expired - Fee Related
  • 2009-08-12 EP EP09781745A patent/EP2342051B1/fr not_active Not-in-force
  • 2009-08-12 WO PCT/EP2009/060430 patent/WO2010034566A1/fr active Application Filing

Non-Patent Citations (1)

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