DE8010217U1 - Switch for a hand tool operated by an electric motor - Google Patents

Description

Patent attorneys Dipl.-lng. Hans Lancjoseh. .Dr.-äßgL.KejnzjW 7000 Stuttgart 1 Herdweg 62 "TeIVfOn (07 * 11) 296523 * '

company

Metabowerke GmbH & Co.

Gerberstrasse 31

7440 Nürtingen

Switch for a hand tool operated by an electric motor

The invention relates to a switch for an electric motor-operated hand tool, in which one in a handle between an "on position" and an "off position" pivotable pawl by one against a spring from a locking position

Metabo 2803 581

Locking and locking member adjustable into a locking position, preferably in the form of a two-armed The lever is locked against being switched on in an "off position" and in its "on position" can be locked for continuous operation.

In one known from DE-Gm 7 3 21 450

Switch, the locking and locking member can be operated by a slide switch. Of the The switch slide is arranged so that it can be moved parallel to the upper edge of the handle. Moving the switch slide can preferably be done through the thumb. The shifting movement in the direction of the However, the handle is perceived as an unnatural movement and a quick, time-saving actuation can not.

, '' In order to avoid these disadvantages, the present invention has the object to improve a switch of the type mentioned such that the lifting of the switch-on and, optionally, the lock for continuous operation easily and quickly allows a natural shifting movement.

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To solve this problem, the invention provides that the against the spring from a locking position in a locking position adjustable locking and locking member via a partially out of the Handle protruding actuator is adjustable and that the adjustment movement of the actuator to cancel the lockout about is directed opposite to the switch-on movement of the pressure surface of the pawl. This allows the device practically in one movement of the hand by pressing down the thumb and pulling it against it at the same time the fingers resting on the pawl. The opposing switching movements of the pawl and actuator result automatically by a closing hand movement, which is perceived as natural and is therefore particularly work-saving. A quick work This makes it much easier with minimal interruptions.

To this end, the actuating member and the pawl on opposite sides are advantageous Pages arranged on the handle, preferably on the top and bottom.

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A dirt and water-tight arrangement of the actuating element in the handle is essential

facilitated if this has a circular cross-section j

and is guided displaceably in a seal in the wall of the handle. The η

Structural training and assembly are particularly easy when the actuator is a Has stroke-limiting circumferential edge, which in the rest position of the actuator on the inside against the wall of the handle.

A space-saving installation in the handle can be achieved that the two arms of the locking and locking member enclose approximately an angle of 90. The end can be particularly simple of the one arm held in contact with an inner end face of the actuating member by a spring will. Furthermore, at the end of the one arm, a projection holding the end of the spring or a projection,.,; ■

corresponding recess can be provided and the other end of the spring can through a projection or a recess in the handle can be kept particularly easy to assemble. All of these parts can

i in the parting line of the two handle shells |

formed handle and can be assembled by simply inserting it without any-

Hetabo 2803 581

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which fastening screws or additional fasteners are required.

The locking and locking element is particularly simple in construction on a one-piece part of one handle half manufactured cylindrical bearing journals held pivotable, wherein the free, the locking and locking member penetrating end of the bearing pin in a receptacle of the other handle half can be included.

Furthermore, the pawl and the dead man's switch can be used as a structural unit to facilitate assembly and repairs designed inserted in adapted recesses and projections of the two handle halves and be held positively after joining the two handle halves.

Further designs according to the invention can be found in the subclaims and are discussed with their Advantages explained in more detail in the description below. In the attached drawings shows:

Fig. 1 is a side view of a

Handle with upper handle half and removed

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Pig. 2 is a partial view of the

Locking and locking member in locking position.

The handle 1 shown in Fig. 1, for example an angle grinder, consists of one shown Handle half 2 and a second, not shown, configured approximately in a mirror-inverted manner Handle pins that are screwed together by means of three screws 3, for example. the Handle halves 2 are stable with one another by grooves 4 and projections arranged in the dividing plane tied together. A dead man's switch 5 and a pawl are in corresponding recesses and projections 6, which are designed together as a structural unit, inserted. The pawl 6 is elongated arranged above on the underside of the handle 1 and a pressure surface 7 against one Compression spring 8 is held pivotably about a pivot point 9 for actuating the dead man's switch 5.

On a cylindrical bearing pin 10, which is injection-molded in one piece together with the handle half 2 is, a locking and locking member 11 is pivotally mounted, which has two arms 12 and 13, the one

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Include angles of about 90. One arm 12 lies with its end on an inner forehead

Page 14 one slidable on the upper hand Handle side 1 arranged actuator 15. '

The actuating member 15 has a circular cross section |

and is along a displacement axis 16 in the |

Handle wall guided displaceably, with a penetration of dirt and through a seal 17 Water and a restraint

by a circumferential edge 18, which can come to rest on the inside of the handle 1, is prevented.

The actuating member is approximately in alignment with the displacement axis 16 15 opposite on the arm 12 a projection 19 is provided between the and a handle-tight recess 20, a spring 21 is provided through which the locking and locking member 11 is always pressed with his arm 12 against the end face 14 of the actuating member 15.

The free end of the other arm 13 of the locking and locking member II is angled L-shaped and on free leg 22, a nose 23 is provided which, as shown in Fig. 2, a lower edge 24 behind

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can grip, wherein through the wall 25 and an outer wall 26 of the pawl 6 a Depression 27 is formed into which the arm 13 of the locking and locking member 11 can dip.

The upper edge 28 of the wall 26 of the switching pawl 6

serves as a stop surface through which switching on I

S the pawl 6 in the locked position of the locking and locking member 11 is prevented. This locked position is shown in FIG.

By depressing the actuating member 15, this switch-on lock is canceled and it can _; after the nose 23 rests against the wall 25, the pawl 6 is depressed and the hand tool is switched on. When the pawl 6 is almost fully actuated, the lug 23 can slide past the lower edge 24 and there is a locking for continuous operation when the pawl 6 is first released and then the actuating member 15 is released. If the actuating member 15 is first released and only the pawl 6 is depressed, the hand tool can be shut down at any time by simply letting go of the pawl 6. The function of the dead man's switch 5 is retained. The operation can be done in a simple manner by one hand, the pawl 6 in the area of

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Pressure surface 7 by one or two fingers with the other fingers except the thumb is actuated and further can by the thumb, the actuator 15 on the upper edge of the Handle 1 are depressed. The unlock and turning on the hand tool can be convenient and easy by closing the hand with a handle movement done quickly, this combined switching movement being a natural hand movement that can be carried out quickly and without much thought

can. An unlocking movement of the thumb that runs counter to the natural sequence of movements is not necessary, so that the new switch training is particularly easy to use.

The switch training can be as described above

one can be connected to a power source by a connecting cable 29 and the operation can be carried out electrically. A corresponding training is also possible with compressed air tools.

Metabo 2803 581

Claims (12)

• r · »ι lit · * · · • I» I IfII. 1 · ·· * • I 111 It »Ii claims 1. Switch for an electric motor-operated hand tool with one in a handle between an "on position" and an "off position" pivotable pawl a locking position adjustable against a spring from a locking position to a locking position and locking member, preferably in the form of a (two-armed lever in an "off position" against Switching on is blocked and can be locked in its "switch-on position" for continuous operation, characterized in that the against the spring (21) from a locking position to a locking position adjustable locking and locking member (11) via a partially protruding from the handle (1) The actuating member (15) is adjustable and that the adjusting movement of the actuating member (15) counter to lifting the switch-on lock set to the switch-on movement of the pressure surface (7) of the pawl (6) is directed. 2. Switch according to claim 1, characterized in that the actuating member (15) and the switching pawl (6) are arranged on opposite sides of the handle (1), preferably on Metabο 2803 581 |) 1. l the top and bottom of the handle (1). 3. Switch according to claim 1, characterized in that the actuating member (15) has a circular cross section and in the wall of the handle (1) and in a seal (17) displaceable is led. 4. Switch according to claim 1, characterized in that the actuating member (15) has a stroke-limiting has circumferential edge (18) which in the rest position of the actuating member (15) on the inside of the Wall of the handle (1) rests. 5. Switch according to claim 1, characterized in that the two arms (12,13) of the locking and Locking member include approximately an angle of 90. 6. Switch according to claim 1 and 5, characterized in that that the end of one arm (12) is held in contact with an inner end face (14) of the actuating member (15) by a spring (21) is. 7. Switch according to claim 6, characterized in that at the end of one arm (12) the end of the Spring (21) holding projection (19) or a Metabo 2803 581 «·» ·> 111 B »» * • t · ■ ι f c ι ···· r • t ((l <f {ll · ··· ί, • r <ι (· · * · tr til IU 'I It ·· Ϊ, corresponding recess is provided, and the other end of the spring (21) by a projection or a recess (20) is held in the handle (1). 8. Switch according to claim 7, characterized in that the displacement axis (16) of the actuating member (15) and the projection or recess (20) provided in the handle (1) for the spring end are approximately in alignment. 9. Switch according to one of claims 1 to 8, characterized in that the end of the other Arm (13) of the locking and locking member (11) is L-shaped with a raised nose (23) at the end of the free leg (2 2) and that the pawl (6) one through two walls (25,26) limited recess (27) on v / eist, the upper edge (28) of a wall (26) as a stop surface for the lower L-shaped end of the other arm (13) of the locking and locking member (11) in its locking position serves, and a lower edge (24) of the interrupted other wall (25) of the recess (27) through the nose (23) of the free leg (22) can be reached from behind in the locking position of the Locking and locking member '(11). Metabo 2803 581 4 III I Ϊ f 1 · ♦ ■ · Kit '■ -' I * «4 • »II 111 ·» - * · 10. Switch according to one of claims 1 to 9, characterized in that the locking and Locking member (11) on a one-piece with a handle half (2) manufactured cylindrical Bearing pin (10) is held pivotably. 11. Switch according to claim 10, characterized in that the free locking and locking member (11) penetrating end of the bearing pin (10) received in a receptacle of the other handle half is. 12. Switch according to claim 10 or 11, characterized in that the switching pawl (6) and the dead man's switch (5) designed as a unit and in adapted recesses and projections of the two handle halves (2) and form-fit after joining the two handle halves (2) is held. Metabo 2803 581