WO2016005072A1

WO2016005072A1 - Electric power tool having a slide switch

Info

Publication number: WO2016005072A1
Application number: PCT/EP2015/059778
Authority: WO
Inventors: Manfred Lutz; Thomas Schomisch
Original assignee: Robert Bosch Gmbh
Priority date: 2014-07-10
Filing date: 2015-05-05
Publication date: 2016-01-14
Also published as: CN106488831B; CN106488831A; KR20170032286A; DE102014213394A1; AU2015287069A1

Abstract

In an electric power tool (10) having a tool receiver (20) and a tool housing (24) in which a drive motor (12) for driving the tool receiver (20) is arranged, wherein a slide switch axially preloaded by means of a restoring spring and intended for manually switching the drive motor (12) on and off is arranged on the tool housing (24) so as to be longitudinally displaceable in the direction of a longitudinal axis (32) of the tool housing (24) and/or pivotable with respect to the longitudinal axis (32), at least one holding geometry is provided which is designed to hold the slide switch in a holding state when a user manually applies a predetermined holding force (F) to the slide switch and to transfer the slide switch automatically into an inoperative state when the user releases the slide switch, wherein the drive motor (12) is switched on in the holding state and switched off in the inoperative state.

Description

description

title

Electric machine tool with a slide switch prior art

The present invention relates to a power tool with a tool holder and a tool housing, in which a drive motor for driving the tool holder is arranged, wherein on the

Tool housing a axially biased by means of a return spring

Slide switch for manually switching on and off of the drive motor is longitudinally displaceable in the direction of a longitudinal axis of the tool housing and / or arranged pivotably with respect to the longitudinal axis. From the prior art such electric power tools are known, which are e.g. provided with a rod-shaped tool housing and are designed in the manner of angle grinders. Such angle grinders are often operated by means of a slide switch, which, for ease of operation, is in its on position, e.g. can be locked permanently by means of a combined sliding and tilting movement, so that a constant actuation of the slide switch or a depression by the user against the force of a return spring is eliminated. To turn off the Wnkelschleifers, however, it is necessary that the user cancels the locking of the slide switch by an active tilting and sliding movement again.

A disadvantage of the prior art is that in such an angle grinder, the locking of the slide switch on the tool housing is designed to be self-holding. This can after an occurrence of an accident during operation of the power tool, for example, after a brief interruption of a corresponding power supply to an uncontrolled, automatic Restart the power tool and thus z. B. too

Damage an assigned insert tool lead.

Disclosure of the invention

An object of the invention is therefore to provide a new power tool in which an uncontrolled restart after interruption of an associated power supply can be prevented. This problem is solved by a power tool with a

Tool holder and a tool housing in which a drive motor is arranged to drive the tool holder. On the tool housing, an axially biased by a return spring slide switch for manually switching on and off of the drive motor is longitudinally displaceable in the direction of a longitudinal axis of the tool housing and / or pivotable in

Arranged with respect to the longitudinal axis. At least one retaining geometry is provided, which is adapted to hold when manually applying a predetermined holding force on the slide switch by a user, the slide switch in a holding state and upon release of the slide switch by the user, the slide switch automatically in a

To put to rest, the drive motor in the holding state

switched on and switched off in idle state.

The invention thus makes it possible to provide a

Power tool, in a continuous operation with switched on

Drive motor by applying a comparatively small holding force on the slide switch by the user is possible and a self-holding blockage of the slide switch after its release can be safely and reliably prevented.

According to one embodiment, an electrical on / off switch electrically connected to the drive motor is mechanically coupled to the slide switch by means of a sliding member. Thus, in a simple manner, the on and off function of the

Drive motor can be realized by means of the slide switch. In addition, it is a spatial separation between the slide switch and the electric on / off switch given.

Preferably, the sliding member has a connection geometry to

5 pivotable coupling of the slide switch in an associated

Pivot on.

As a result, a spatially defined movement of the slide switch is given. Preferably, the slide switch has one of the tool housing

remote from the actuating side and a tool housing facing the functional side, wherein at least one sliding geometry and a driver for the sliding member are provided on the functional side.

As a result of the preferably ergonomically designed actuation side of

Slide switch is given a comfortable operation by the user. The function side of the slide switch allows a defined sequence of movements as well as activating the on / off switch in case of a

Operation of the slide switch by the user.

According to one embodiment, the sliding geometry of an am

Tool housing guided bulge formed on the functional side, which is arranged in the region of a tool holder facing the first axial end of the slide switch, wherein directed towards the tool housing edge facing away from the tool holder, the second axial end of the slide switch and a relative to the longitudinal axis of the tool housing inclined holding surface of a Groove in the tool housing form the holding geometry for locking the slide switch in the holding state.

Thus, a particularly simple and uncomplicated holding function of the

Slide switch can be realized on the tool housing.

The slide geometry is preferably formed by a bulge of the functional side guided on the tool housing, which is arranged in the region of a first axial end of the slide switch facing the tool holder and axially spaced from the bulge in the direction of one of the A tool surface facing the tool housing and a corresponding to this relative to the longitudinal axis of the tool housing facing away from the tool holder, the second axial end of the slide switch on the slide switch is formed a projection pointing

Tool housing inclined holding surface of a recess in the tool housing form the holding geometry for locking the slide switch in the holding state.

This is one of a corresponding, rear edge of the

Slide switch independent holding function of the slide switch on

Tool housing given the power tool.

Preferably exists between the bulge and the contact surface of the

Tab of the slide switch a distance.

As a result, the hold functionality of the slide switch can be made particularly efficient when pressed down by the user.

Preferably, a predetermined lever length is formed between the bulge and the second axial end of the slide switch, wherein a

Ratio between the distance and the lever length is in a range between 0.2 and 0.8.

In this way, the holding force to be applied by the user can be adjusted so that an ergonomic and especially fatigue-free

Continuous operation of the power tool is possible.

Preferably, an angle between the holding surface of the recess lies in the

Tool housing and the longitudinal axis of the tool housing between 35 ° and 85 °.

Thus, an uncontrolled slipping of the projection of the holding surface of the tool housing can be prevented.

Preferably, a shoulder height of the recess in the tool housing is less than or equal to a height of the projection of the slide switch. As a result, excessive material weakening of the tool housing is avoided.

According to one embodiment forms an axial end edge of the functional side of the sliding geometry and a pivot point in a pivoting of the

Slide switch off.

As a result, a structurally particularly simple construction of the slide switch is given.

According to one embodiment, a starting ramp for the sliding geometry of the slide switch is formed on the tool housing.

As a result of the starting ramp is a pronounced pivoting movement of the

Slide switch can be realized in relation to the longitudinal axis.

According to one embodiment, the holding geometry with a relative to the longitudinal axis of the tool housing inclined contact surface of a projection on the slide switch and with a relative to the longitudinal axis of the

Tool housing inclined holding surface of a recess of the

Tool housing formed, wherein the projection in the region of the

Tool holder facing, the first axial end of the slide switch is formed on the functional side and a sliding geometry forming the recess in the region of a second axial end of the slide switch is arranged.

In this way, a mirror-inverted arrangement of the holding geometry and the sliding geometry can be made possible on the slide switch.

According to one embodiment, the pivot point is between a first and a second axial end of the slide switch and on both sides of the pivot point is provided in each case a holding geometry.

In this way, the user can the holding force in the region of a first or a second axial end of the slide switch or on both sides of the pivot point Apply to lock the slide switch in the holding state for continuous operation of the drive motor of the electric machine tool.

According to one embodiment, the pivot point is arranged at a first or a second axial end of the slide switch and at least one, preferably three, retaining geometries are provided.

As a result, a particularly reliable locking of the slide switch in the holding state is possible. In addition, due to the end-side articulation of the slide switch to the slide member an effective leverage is given, which requires a relatively small holding force.

According to one embodiment, the slide switch is designed to be displaceable parallel to the longitudinal axis of the tool housing, wherein the holding geometry in each case in the region of a first and a second axial end of the

Sliding switch is provided.

This simplifies the structural design of the slide switch, since a pivot point is eliminated and a holding geometry the function of e.g. convex spherical geometry takes over.

According to one embodiment, a radially inwardly directed projection is formed on a motor housing associated with the drive motor, which has a holding surface inclined relative to the longitudinal axis of the tool housing, which forms the holding geometry with a contact surface of a radially outwardly directed projection on the sliding member correspondingly inclined relative to the tool housing.

As a result, the holding geometry can be implemented independently of the slide switch and on the inside in the tool housing of the power tool.

According to a further embodiment, a holding hook is provided on one of the tool holder facing, the first axial end of the slide switch, which is blockable on a blocking hook formed on the tool housing, wherein the retaining hook and the blocking hook form the holding geometry. Due to the blocking hook formed on the inside of the tool housing, a concealed holding geometry for the slide switch can be realized.

Brief description of the drawings

The invention is illustrated by means of the drawings

Embodiments explained in more detail in the following description. Show it:

1 is a perspective view of a formed as angle grinder power tool according to the present invention,

Fig. 2 is a perspective and partially opened partial view of the

Angle grinder of Fig. 1,

3 shows a first embodiment of a sliding switch which can be used with the power tool of FIG. 1 in the idle state, FIG.

4 shows the slide switch of FIG. 3 in the holding state, FIG.

5 shows a second embodiment of a sliding switch which can be used with the power tool of FIG. 1 in the holding state, FIG.

FIG. 6 shows the slide switch of FIG. 5 in the idle state, FIG.

FIGS. 7-13 show further embodiments of slide switches that can be used with the power tool of FIG. 1, and FIGS

14-16 another alternative embodiment of the one with the

Electric machine tool of Fig. 1 usable slide switch in the transition from the idle state to the holding state.

Description of the embodiments Fig. 1 shows an exemplary power tool 10, which is illustratively formed in the manner of a handheld angle grinder and having a drive motor 12, which may be any type of motor, such as an electronically commutated motor or a DC motor. The drive motor 12 serves to drive a drive shaft 14, which via an angular gear 16 and a

Output shaft 18 is connected to a tool holder 20, wherein the tool holder 20 for receiving a rotationally driven

Insert tool 22, e.g. a grinding, roughing or cutting disc is formed. The drive motor 12 is connected by means of a preferably rod-shaped tool housing 24 of the power tool 10

arranged slide switch 30 at least on and off. The slide switch 30 is preferably designed to be displaceable at least along a longitudinal axis 32 of the tool housing 24. The power supply of the drive motor 12 takes place, for example, via a power line 34, or alternatively with one or more associated battery packs.

It should be noted, however, that the operation and structure of a suitable drive motor or a suitable Wnkelschleifers the

Skilled in the art are well known in the art. Therefore, for the sake of simplicity and brevity of description, a further description thereof will be omitted here. In addition, it should be noted that the present invention is not limited to mains-dependent, hand-held angle grinder, but rather in general

network dependent or off grid, e.g. can be used with an associated battery pack, operable power tool machines having a slide switch for turning on and off an associated drive motor, e.g. in a polishing machine, a grinding machine, a

Milling machine, a bar saw, a jigsaw, etc. Furthermore, the present invention can also be used in non-electrically operable

Hand tool find application that can be switched on and off via an associated slide switch.

FIG. 2 shows the electric machine tool 10 of FIG. 1, which according to one embodiment has an electrical on / off switch 40, which is mechanically coupled to the slide switch 30 of FIG. 1 by means of a sliding member 50. The slide switch 30 is by means of a sliding member 50th arranged return spring 52 axially, ie biased parallel to the longitudinal axis 32, so that the user-released slide switch 30 is automatically withdrawn in the direction of the power line 34. The on / off switch 40 is electrically contacted by way of example via two lines 42, 44 with the drive motor and with two further lines 46, 48 of the power line 34, so that the drive motor by moving the

Slide switch 30 against the restoring force applied by the return spring 52 and / or tilting thereof with respect to the longitudinal axis 32 can be turned on and off.

FIG. 3 and FIG. 4, to which reference is made at the same time in the further progress of the description, show a first embodiment of a with the

Electric power tool 10 of FIG. 1 usable slide switch 100. This preferably has a tool housing 24 of the

Electric machine tool 10 of Fig. 1 pioneering, preferably

ergonomically designed actuating side 102 and the tool housing 24 facing functional side 104 with a sliding geometry 106. A

Slide member 108 for mechanical coupling of the slide switch 100 with the electrical on / off switch 40 of FIG. 2 has a

Connecting geometry 110 for pivotable coupling of the

Slide switch 100 in a pivot point 112 on.

The sliding geometry 106 is preferably formed with a guided on the tool housing 24 bulge 116 of the functional side 104, wherein the

Bulge 116 a preferably at least approximately

has semicircular cross-sectional geometry and is arranged in the region of a first axial end 118 of the slide switch 100, which faces the tool holder 20 of FIG. 1 by way of example. In the region of a second axial end 120 of the first axial end 118 directed away

Slide switch 100 form an edge 122 and a support surface 124, which is inclined relative to the longitudinal axis 32, of a recess 126 of the housing

Tool housing 24 a holding geometry 128 for locking the

Slide switch 100 in the holding state when the drive motor, if the user, for example by means of a finger manually a sufficiently high holding force F perpendicular to the longitudinal axis 32 on the slide switch 100 can act (see Fig. 4). For switching on the drive motor of the electric machine tool 10 of Fig. 1, the user has the slide switch 100 starting from the illustrated in Fig. 3 rest state in the direction of arrow 130 parallel to the longitudinal axis 32 and counter to the restoring force of the return spring 52 of Fig. 2 to

4 to move to the holding state of the slide switch 100 shown in FIG. 4, in which the edge 122 bears against the holding surface 124 by the holding force F applied by the user and acting essentially perpendicular to the longitudinal axis 32 on the slide switch 100. Due to the leverage of the pivotally coupled to the slide member 108

Slide switch 100 is in the holding state of the slide switch 100 only a relatively small manual holding force F applied by the user, so that the holding state of the slide switch 100 when turned on

Drive motor for continuous operation of the power tool 10 of FIG. 1 can be maintained fatigue-free over long periods.

If the user unintentionally or controlled release the slide switch 100, the holding force F no longer acts on the slide switch 100 and the return spring 52 of FIG. 2 pulls the slide switch 100 by means of

Shift member 108 from its holding state of Fig. 4 back to the illustrated in Fig. 3 idle state of the slide switch 100 is reached again and the drive motor of the power tool 10 of Fig. 1 is turned off, the edge 122 due to the lack of holding force F and the force effect the return spring 52 slides back over the holding surface 124. Here, the slide switch 100 performs primarily in relation to the longitudinal axis 32 a

Longitudinal movement, which is superimposed on a tilting movement. The slide switch 100 is guided by the slide geometry 106 in the form of the bulge 116 and the connection geometry 110 as well as along the inclined support surface 124 of the recess 126 along sliding edge 122, which together form the holding geometry 128.

Fig. 5 and Fig. 6, to which reference is made at the same time in the further progress of the description, show a second embodiment of a with the

Electric power tool 10 of Fig. 1 usable slide switch 200. This preferably has a tool housing 24 of the

Electric machine tool 10 of Fig. 1 pioneering, preferably ergonomically designed actuating side 202 and a tool housing 24 facing functional side 204 with a sliding geometry 206. A

Slide member 208 for mechanically coupling the slide switch 200 with the electrical on / off switch 40 of FIG. 2 has a

Connection geometry 210 for pivotable coupling of the

Slide switch 200 in a pivot point 212 on.

The sliding geometry 206 is preferably formed with an illustratively convex bulge 216 of the functional side 204 guided on the tool housing 24, wherein the bulge 216 has a preferably at least approximately semicircular cross-sectional geometry and is arranged in the region of a first axial end 218 of the slide switch 200, in this case the tool holder the power tool 10 of FIG. 1 faces. In the region of a second axial end 220 of the slide switch 200 directed away from the first axial end 218, a projection 222 directed toward the tool housing 24 with a contact surface 224 in conjunction with a holding surface 226 of a recess 228 of the tool housing 24 which is inclined relative to the longitudinal axis 32 likewise forms a holding geometry 230 to

Locking the slide switch 200 in the holding state with the drive motor on, when the user, e.g. manually using a finger

Holding force F perpendicular to the longitudinal axis 32 can act on the slide switch 200. The contact surface 224 of the projection 222 and the holding surface 226 of the recess 228 are each correspondingly inclined with respect to the longitudinal axis 32 by a Wnkel α, so that in the holding state of the slide switch 200 of FIG. 5 with the drive motor, the contact surface 224 of the projection

222 rests at least partially on the support surface 226 of the recess 228 of the tool housing 24 and preferably a comparatively small holding force F sufficient for permanent maintenance of the holding state. If the user controls the slide switch 200 or if necessary. uncontrollably free, so the contact surface 224 of the projection 222 slides on the support surface 226 of the recess 228 with simultaneous pivoting of the slide switch 200 about the pivot point 212 along until the contact surface 224 of

Projection 222 on the support surface 226 of the recess 228 can move in the axial direction, so that the slide switch 200 starting from the

Holding state shown in FIG. 5 due to the force of the return spring 52 of Fig. 2 can move back parallel to the longitudinal axis 32 into the rest state shown in Fig. 6 and the drive motor of the power tool 10 of FIG. 1 is turned off. Here, the slide switch 200 slides with the aid of its sliding geometry 206 in the form of the semicircular bulge 216 on the tool housing 24 along. In the transition from the holding state in the

Resting state and vice versa, the slide switch 200 preferably performs a pivoting or tilting movement about the pivot point 212 in combination with a linear movement of the bulge 216 on the tool housing 24 along the longitudinal axis 32.

Thus, the slide switch 200 even with the application of a comparatively small holding force F still in the holding state with activated

Drive motor 12 of FIG. 1 can be held and in the case of

controlled or uncontrolled release by the user, however, immediately and with absolute reliability to sleep

Switching off the drive motor passes, exists between a

Vertex 232 of the bulge 216 and the contact surface 224 of

Projection 222 preferably a distance A, while between the bulge 216 and the second axial end 220 of the slide switch 200 preferably a predetermined lever length L is formed. A numeric

Number ratio between the distance A and the lever length L is here, including appropriate interval limits preferably between 0.2 and 0.8. An angle α between the holding surface 226 of the recess 228 in

Tool housing 24 and the longitudinal axis 32 of the tool housing 24 is shown in Fig. 6, including the interval limits preferably between

35 ° and 85 ° degrees. A heel height h of the recess 228 of

Tool housing 24 is in this case preferably less than or equal to a height H of the illustratively formed on the underside sliding switch 200 projection 222. Fig. 7 shows a further embodiment of the one with

Electric power tool 10 of Fig. 1 usable slide switch 300. This preferably has one of the tool housing 24 of

Electric machine tool 10 of Fig. 1 pioneering, preferably

ergonomically designed actuation side 302 and a tool housing 24 facing functional side 304. On the functional side 304 of

Slide switch 300 serves one of the tool holder 20 of FIG. 1 facing axial end edge 306 at the same time as slide geometry 308 and

Pivot 310. In the region of the end edge 306 facing away from the axial end 312 of the slide switch 300 is preferably a holding geometry 314 is formed, which according to one embodiment with a on the

Function side 304 molded projection 316 and a recess 318 in

Tool housing 24 is formed. The projection 316 and the recess 318 are each formed on one side inclined. The detailed mode of operation of the retaining geometry 314 corresponds to the operation of the retaining geometries of the first two embodiments of the slide switches 100 of FIGS. 3 and 4 as well as 200 of FIGS. 5 and 6, so that in order to avoid repetition

Reference is made to the description of Fig. 3 to Fig. 6.

In the state shown in FIG. 7, the slide switch 300 is at rest, so that the drive motor 12 of the power tool 10 of FIG. 1 is turned off or de-energized. In the holding state with

switched drive motor, the projection 316 is preferably in an at least partially positive engagement with the recess 318, so that this state again manually by a user side

applied holding force F can preferably be maintained with relatively little use of force. The mechanical control of the electrical on / off switch 40 of Fig. 2 by means of the on

Function side 304 of the slide switch 300 integrally formed driver 320, which in turn is by means of a suitable connection geometry 322 of a sliding member 324 for actuating the electric on / off switch engaged.

Fig. 8 shows a further embodiment of a with the

Electric power tool 10 of Fig. 1 usable slide switch 400. This has, in contrast to the embodiment of Fig. 7 on one of the ergonomically designed preferably actuation side 402 opposite

Function side 404 in the region of the tool holder 20 of FIG. 1 facing first axial end 406 one with a preferably

semi-circular, spherical bulge 408 formed sliding geometry 410. The bulge 408 is guided on a preferably integrally formed to the tool housing 24, illustratively concave curved ramp 412. At the

Change between the direction indicated by a solid line Idle state of the slide switch 400 in the symbolized by a dotted line holding state of the slide switch 400 with acting holding force F, the bulge 408 slides over the starting ramp 412. At a second axial end 414 is on the function side 404 turn a

Holding geometry 416 formed, the structural design and operation in turn corresponds to the above-described holding geometries.

Fig. 9 shows another embodiment of the one with

Electric power tool 10 of FIG. 1 usable slide switch 500. This preferably has a side facing away from the tool housing 24 of FIG. 1 actuating side 502 and a tool housing 24 facing the functional side 504th

In contrast to the embodiments of slide switches explained with reference to FIGS. 3 to 8, in the area of a first axial end 506 facing the tool holder 24, a projection 508 is provided with a contact surface 510 inclined relative to the longitudinal axis 32, which cooperates with a correspondingly inclined one Holding surface 512 of a recess 514 of the

Tool housing 24 in turn forms a holding geometry 516. In the region of a second axial end 518, however, is a preferably semi-circular

Bump 520 is provided as a sliding geometry 522.

In the holding state of Fig. 9 when the drive motor of the

Power tool 10 of FIG. 1 causes the holding force F, that the contact surface 510 of the projection 508 at least partially on the

Holding surface 512 of the recess 514 is applied, whereby this state of

User can be maintained under minimal force against the force of the return spring 52 of FIG. When the user releases the slide switch 500, the inclined abutment surface 510 of the protrusion 508 slides over the support surface 512 of FIG. 2 due to the force of the return spring 52 of FIG

Recess 514, until the projection 508 and the recess 514 are disengaged and the slide switch 500 reaches the indicated with the dotted line idle state and the drive motor of the electric machine tool 10 of FIG. 1 is turned off. The actuation of the electrical on / off switch 40 of Fig. 2 is again by means of a sliding member 524, by means of its connection geometry 526 is coupled to a driver 528 formed on the functional side 504.

Fig. 10 shows a further embodiment of a with the

Power tool 10 of FIG. 1 usable slide switch 600, which illustratively has a first and a second axial end 602, 604. A sliding member 606 for mechanically actuating the electrical on / off switch 40 of FIG. 2 has a connection geometry 608 to

pivotable coupling of the slide switch 600 in a pivot point 610. This pivot point 610 is positioned on a functional side 612 facing the tool housing 24 of FIG. 1, preferably centrally between the axial ends 602, 604. On both sides of the pivot point 610 is a first and second holding geometry 614, 616 on the function side 612 of

Sliding switch 600 provided, which starting from here shown

Hibernation after reaching the holding state upon application of the holding force F maintains this, wherein the holding force F acts only in the region of the first or second holding geometry 612, 614 and the first or second axial end 602, 604 on the slide switch 600. The

Holding geometries 614, 616 correspond in terms of their constructive

Embodiment and its mode of operation the holding geometries already explained above, so that reference is made to the description of FIG. 5 to FIG. 9 with regard to the further design details.

To further facilitate the operation of the rocker around the

Pivoting point 610 pivotable and axially displaceably mounted in the direction of an arrow 618 slide switch 600, an actuating side 620 in the region of the first axial end 602 and in the region of the pivot point 610 preferably each one of the user haptically detectable and ergonomically designed, ramp-like increase 622, 624. Starting from the idle state of the slide switch 600 shown here, this can be set by the user by parallel displacement to the longitudinal axis 32 in the direction of arrow 618 in the holding state, wherein the retaining geometries 614, 616 each come into their engaged state, and by the one-sided application of the

Holding force F are kept permanently in this. Fig. 11 shows a further embodiment of a with the

Power tool 10 of FIG. 1 usable slide switch 700, which preferably has a first and a second axial end 702, 704. A sliding member 706 for mechanically actuating the electrical on / off switch 40 of FIG. 2 has a connection geometry 708

pivotable coupling of the slide switch 700 in a pivot point 710. This pivot point 710 is preferably positioned on a functional side 712 facing the tool housing 24 of FIG. 1 in the region of the first axial end 702. In contrast to all embodiments of slide switches described in FIGS. 3 to 10, FIG

Slide switch 700 in the region of its functional side 712 by way of example, preferably three retaining geometries 714, 716, 718. Incidentally, the mode of operation and the structural design of the retaining geometries 714, 716, 718 corresponds to the retaining geometries of the slide switches 100 of FIG. 3 and FIGS. 4 and 200 of FIGS. 5 and 6, so that in order to avoid repetition the

Description of Fig. 3 to Fig. 6 is referenced.

Starting from the idle state illustrated in FIG. 11 and the drive motor of the electric machine tool 10 of FIG. 1 switched off, the holding state is parallelized by a translatory movement of the slide switch 700

Longitudinal axis 32 is reached in the direction of an arrow 720 and maintained by the action of the holding force F on a side facing away from the tool housing 24, concave actuating side 722. In the holding state of

Slide switch 700 are all three retaining geometries 714, 716, 718 in the engaged state, whereby an excellent locking effect in

Holding state of the slide switch 700 is given even at a relatively small holding force F.

Fig. 12 shows a further embodiment of the one with

Power tool 10 of FIG. 1 usable slide switch 800, illustratively having a first and a second axial end 802, 804. On a side facing the tool housing 24 functional side 806 of

Slide switch 800 is a driver 808 formed, preferably integrally. A sliding member 810 has a connection geometry 812 for slightly pivotable or tiltable coupling of the slide switch 800 in FIG

Reference to the longitudinal axis 32. The driver 808 is preferably at least positioned approximately centrally on the functional side 806 between the axial ends 802, 804. On both sides of the driver 808 and the first and second axial end 802, 804, a first and second holding geometry 814, 816 provided on the functional side 806 of the slide switch 800, which starting from the rest state shown here of the slide switch 800 after reaching the holding state when acting Holding force F maintains this, wherein the holding force F acts in each case only in the region of the first or second holding geometry 814, 816 and the first or second axial end 802, 804 on the slide switch 800. The retaining geometries 814, 816 correspond in terms of their structural design and their

Functioning of the retaining geometries already explained above, so that reference is likewise made to the description of FIG. 5 and FIG. 6 with regard to the further design details. To further facilitate the operation of the pivotable and axially displaceably mounted in the direction of an arrow 818 slide switch 800 has an actuating side 820 in the region of the first axial end 802 and in the region of the driver 808 each haptic preferably easy to detect by the user and preferably ergonomically designed, ramp-like increase 822, 824 on. Starting from the idle state of the slide switch shown here

800 this can be offset by the user by parallel displacement to the longitudinal axis 32 in the direction of arrow 818 in the holding state, wherein the retaining geometries 814, 816 each come into their engaged state, and are held by the one-sided application of the holding force F permanently in this.

Fig. 13 shows a further embodiment of a with the

Electric power tool 10 of FIG. 1 usable slide switch 850. This has a cuboid driver 856 for a sliding member 858 on an illustratively a motor housing 852 of the drive motor 12 of the electric hand tool 10 of FIG. This

Slide member 858 in turn serves for the mechanical control of the electrical on / off switch 40 of Fig. 2 by the slide switch 850 and has for this purpose a connection geometry 860th Das

Motor housing 852 has a radially inwardly directed projection 862 with a holding surface 864 which is inclined relative to the longitudinal axis 32. At an end 866 of the sliding member 858 pointing away from the tool holder 20 of FIG. 1, a radially outwardly directed projection 868 with an abutment surface 870 formed at least approximately corresponding to the inclination of the holding surface 864 is preferably integrally formed. The support surface 864 of the motor housing-side projection 862 forms, in cooperation with the abutment surface 870 of the slide-side projection 868

Holding geometry 872 for locking the slide switch 850 in its illustrated here with a solid line holding state in which applied by the user holding force F acts on an actuating side 874 of the slide switch 850 substantially perpendicular to the longitudinal axis 32.

If the user releases the slide switch 850, then this is automatically withdrawn in the direction of an arrow 876 due to the then missing holding force F in conjunction with the force of the return spring 52 of FIG. 2, until the idle state of the slide switch 850 symbolized by a dotted line is reached and the drive motor of the power tool 10 of FIG. 1 is turned off. To put the slide switch 850 from rest to the holding state and to hold in this, the

Sliding switch 850 against the direction of the arrow 876 substantially parallel to the longitudinal axis 32 shifted until the state indicated by the solid line holding state of the slide switch 850 with activated

Drive motor is reached and this can be maintained by applying the holding force F. In the holding state of the slide switch 850, the holding geometry 872 is in the engaged state, i. the holding surface 864 of the motor housing-side projection 862 is at least partially on the

Bearing surface 870 of the slide-side projection 868 on. Incidentally, the mode of operation and the structural design of the retaining geometry 872, e.g. the holding geometry of the slide switch described in Fig. 5 and Fig. 6, so that in order to avoid repetition, it can be referred to.

To further improve the operation of the sliding in relation to the longitudinal axis 32 pivotable or tiltable and sliding slide switch 850, the actuating side 874 in the region of a first axial end 878 of the slide switch 850, which faces the tool holder 20 of Fig. 1, preferably one in particular for Finger or thumb operation

ergonomically designed, preferably ramp-shaped or unilaterally concave curved increase 880. This elevation 880 is illustratively flat at a second end 882 of the slide switch 850, away from the first axial end 878. In the region of the second axial end 882 of

Slide switch 850 functions the function page 854 at least partially as a voltage applied to the motor housing 852 sliding geometry for guiding the pivotable or tiltable slide switch 850, so that a convex bulge of the function side 854 as sliding geometry in this

Embodiment is dispensable. Fig. 14 to Fig. 16, in the further progress of the description at the same time

Referring to Fig. 12, another alternative embodiment of a slide switch 900 employable with the power tool 10 of Fig. 1 is shown. Illustratively, this has the slide member 606 of Fig. 10 for mechanically actuating the electrical on / off switch 40 of Fig. 2 and has the connection geometry 608 of FIG. 10 for the pivotable coupling of the

Slide switch 900 in an associated pivot point. This is arranged in analogy to the pivot point 610 of FIG. 10 on a tool housing 24 of FIG. 1 facing functional side 902 of the slide switch 900 and positioned in the transition region between the function side 902 and the connection geometry 608, but for simplicity and

Clarity of drawing not marked separately.

A first axial end 910 of the slide switch 900 is the

Tool holder 20 of Fig. 1 facing. In the region of this end 910 is on a side facing away from the function side 902 actuation side 912 of

Slide switch 900 a holding hook 914 is formed, which is in the holding state of the slide switch 900 with a radially inwardly directed, formed in an opening 918 of the tool housing 24 blocking hooks 916 at least partially positively engageable engageable. The retaining hook 914 of the slide switch 900 forms in cooperation with the locking hook 916 of the

Tool housing 24 a holding geometry according to the invention.

Preferably, in the region of the first axial end 910 at one of the

Function side 902 pioneering operation side 912 of the slide switch 900 preferably a ergonomically designed, first ramp-shaped

Elevation 926 preferably integrally formed. At one of the first axial end 910 of the second axial end 928 of the slide switch 900, a second ramp-shaped elevation 930 is formed, which has a reduced height compared to the first ramp-shaped elevation 926. This results between the elevations 926, 930 an at least approximately concave course of the actuation side 912 of the slide switch 900, which leads to a comfortable operating experience of the user.

Shifts a user, the slide switch 900 now starting from the illustrated in Fig. 14 rest in the direction of an arrow 932 parallel to the longitudinal axis 32 of the tool housing 24, the blocking hook 914 is shown in Fig. 15 below the holding hook 916 and the holding geometry has almost their engaged state reached. As shown in Fig. 16 is the

Slide switch 900 so far parallel to the longitudinal axis 32 in the direction of arrow 930 axially displaced that is pivoted by user side application of the holding force F of the slide switch 900 such that the locking hook 914 engages behind the retaining hooks 916 and the hooks 914, 916 completely in the engaged state with the drive motor of the

Electric machine tool 10 of Fig. 1 are located. This holding state can be maintained fatigue-free by the action of the holding force F permanently and with comparatively little use of force.

However, if the user releases the slide switch 900 in a controlled or uncontrolled manner, the holding force F is zero and the slide switch 900 is moved from the holding state due to the force effect of the restoring spring 52 acting on the sliding member 606 in FIG. FIG. 16 shows an intermediate state of FIG. 15 until the idle state has been reached in accordance with FIG. 14, in which the drive motor of the power tool 10 of FIG. 1

is turned off, retracted substantially parallel to the longitudinal axis 32 and against the direction of the arrow 930. In order to achieve a smooth sliding back of the slide switch 900 after its release, has the

Retaining hook 914 on the slide switch 900 via a support surface 934 with a suitable inclination, which upon release of the slide switch 900, i. on omission of the holding force F, slides over the blocking hook 916 of the tool housing 24, wherein the slide switch 900 in addition to its translational movement parallel to the longitudinal axis 32 at the same time performs a pivoting movement.

Claims

claims

1. Electric machine tool (10) with a tool holder (20) and a tool housing (24), in which a drive motor (12) for driving the tool holder (20) is arranged, wherein on the tool housing (24) by means of a return spring (52) axially biased

Slide switch (100, 200) for manually switching on and off the drive motor (12) longitudinally displaceable in the direction of a longitudinal axis (32) of the tool housing (24) and / or pivotally arranged with respect to the longitudinal axis (32), characterized in that at least a holding geometry (128, 230) is provided, which is adapted to the manual application of a predetermined holding force (F) on the slide switch (100, 200) by a user to hold the slide switch (100, 200) in a holding state and at a Release of the

Slide switch (100, 200) by the user to put the slide switch (100, 200) automatically in a rest state, wherein the drive motor (12) is turned on in the hold state and turned off in the idle state.

2. Electric machine tool according to claim 1, characterized in that with the drive motor (12) electrically conductively connected, electrical on / off switch (40) by means of a sliding member (50, 108, 208)

mechanically coupled to the slide switch (100, 200).

3. Power tool according to claim 2, characterized in that the sliding member (50, 108, 208) has a connection geometry (110, 210) for pivotally coupling the slide switch (100, 200) in an associated pivot point (112, 212).

4. Electric machine tool according to claim 2 or 3, characterized

characterized in that the slide switch (100, 200) is one of

Tool housing (24) facing away from the actuating side (102, 202) and the tool housing (24) facing the functional side (104, 204), wherein on the functional side (104, 204) at least one sliding geometry (106, 206) and a driver (1 14, 214) for the sliding member (50, 108, 208) are provided.

Electric machine tool according to claim 4, characterized in that the sliding geometry (106) of a tool housing (24) guided bulge (1 16) of the functional side (104) is formed, in the region of the tool holder (20) facing the first axial end ( 1 18) of the slide switch (100) is arranged, one of the

Tool housing (24) directed edge (122) one of the

Tool receiving (20) facing away, the second axial end (120) of the slide switch (100) and a relative to the longitudinal axis (32) of the

Tool housing (24) inclined holding surface (124) of a recess (126) in the tool housing (24) form the retaining geometry (128) for locking the slide switch (100) in the holding state.

Electric machine tool according to claim 4, characterized in that the sliding geometry (206) of a tool housing (24) guided bulge (216) of the functional side (204) is formed, in the region of the tool holder (20) facing the first axial end (218 ) of the slide switch (200) is arranged and axially spaced from the bulge (216) in the direction of one of the tool holder (20) facing away, the second axial end (220) of the slide switch (200) on the slide switch (200) facing the tool housing (24) Projection (222) is formed, wherein a contact surface (224) of the projection (222) on the tool housing (24) and a corresponding thereto relative to the longitudinal axis (32) of the tool housing (24) inclined holding surface (226) of a recess (228) in Tool housing (24) form the holding geometry (230) for locking the slide switch (200) in the holding state.

Electric machine tool according to claim 6, characterized in that between the bulge (216) and the contact surface (224) of the

Projection (222) of the slide switch (200) is a distance (A).

Electric machine tool according to claim 7, characterized in that between the bulge (216) and the second axial end (220) of the Slide switch (200) a predetermined lever length (L) is formed, wherein a ratio between the distance (A) and the lever length (L) is in a range between 0.2 and 0.8.

9. Power tool according to one of claims 6 to 8, characterized

characterized in that an angle (a) between the holding surface (226) of the recess (228) in the tool housing (24) and the longitudinal axis (32) of the tool housing (24) is between 35 ° and 85 °.

10. Electric machine tool according to one of claims 6 to 9, characterized

characterized in that a heel height (h) of the recess (228) in

Tool housing (24) is less than or equal to a height (H) of the projection (222) of the slide switch (200).

1 1. Electric machine tool according to claim 4, characterized in that an axial end edge (306) of the functional side (304) forms the sliding geometry (308) and forms a pivot point (310) upon pivoting of the slide switch (300).

12. Electric machine tool according to claim 4, characterized in that on the tool housing (24) a starting ramp (412) for the sliding geometry (410) of the slide switch (400) is formed.

13. Electric machine tool according to claim 4, characterized in that the holding geometry (516) with a relative to the longitudinal axis (32) of the

Tool housing (24) inclined contact surface (510) of a projection (508) on the slide switch (500) and with a relative to the longitudinal axis (32) of the tool housing (24) inclined holding surface (512) of a recess (514) of the tool housing (24) is formed , wherein the projection (508) in the region of a first axial end (506) of the slide switch (500) facing the tool holder (20) is formed on its functional side (504) and a bulge (520) forming the sliding geometry (522) in the region a second axial end (518) of the slide switch (500) is arranged.

14. Power tool according to claim 3, characterized in that the pivot point (610) between a first and a second axial end (602, 604) of the slide switch (600) and located on both sides of

Pivot point (610) each have a holding geometry (614, 616) is provided.

15. Power tool according to claim 3, characterized in that the pivot point (710) at a first or a second axial end (702, 704) of the slide switch (700) is arranged and at least one, preferably three, holding geometries (714, 716, 718 ) are provided.

16. Power tool according to one of claims 1 to 4, characterized

characterized in that the slide switch (800) is designed to be displaceable parallel to the longitudinal axis (32) of the tool housing (24), wherein the holding geometry (814, 816) in each case in the region of a first and a second axial end (802, 804) of the slide switch (800 ) is provided.

17. Power tool according to claim 2 or 3, characterized

characterized in that a radially inwardly directed projection (862) is formed on a motor housing (852) associated with the drive motor (12) and has a holding surface (864) inclined relative to the longitudinal axis (32) of the tool housing (24) to the

Tool housing (24) correspondingly inclined contact surface (870) of a radially outwardly directed projection (868) on the sliding member (858) forms the holding geometry (872).

18. Power tool according to one of the preceding claims, characterized in that on one of the tool holder (20) facing the first axial end (910) of the slide switch (900), a holding hook (914) is provided which formed on a tool housing (24) Blocking hook (916) is blockable, wherein the retaining hook (914) and the blocking hook (916) form the retaining geometry (918).