FI67765C - Circuit arrangement - Google Patents

Description

ΓΒ1 m / ANNOUNCEMENT 2772c

«SIMP B 11 UTLÄGGNINGSSKRIFT O // OD

2¾¾ ° («) paiont ^ cddclrt '^ ^ ^ (51) Kv.lk.> t.CI. * H 01 H 13/08, G 05 G 7/02 (21) Patent application - Patentansökning 800728 (22) Application date - Ansölcnfngsdag 10.03.80 (N) (23) Start date - Giltighetsdag 10.03.80 (41) Has become public - Blivit offentlig 1 1.09.80

National Board of Patents and Registration Date of display and publication - Q

Patent- och registerstyrelsen '' Ansökan utlagd och utl.skriften publicerad 31 .01 .85 (32) (33) (31) Pyydetty etuoikeus — Begärd priority 10.03 * 79

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) P 2909 ^ 99-3 Proven-Styrkt (71) C. S E. Fein GmbH & Co. KG Stuttgart, Leuschnerstrasse * »1- ^ 7, 7000 Stuttgart 1, Federal Republic of Germany1-Förbundsrepubliken Tyskland (DE) (72) Werner Grupp, Vaihingen, Benno Schweizer, Schorndorf, Federal Republic of Germany] ta-Förbundsrepubliken Tyskland (DE) Oy (74) Ab (5 * 0 Coupling device - Koppiingsanordning

The invention relates to a switching device according to the preamble of claim 1.

Hand tool handles prove to be advantageous in all work operations where a substantial part of the feed force is already provided by the tool and the hand handling the power tool has to mainly control the switching and control tasks. Such hand positions are therefore preferably used in circular saws, milling cutters, jigsaws and circular saws. Depending on the use case and size of the power tool, it is expedient to be able to hold the bracket handle in two gripping positions in order to adjust the position of the guide plane individually relative to the work surface. This is desirable, for example, when the same power tool is sometimes used near the floor, sometimes on a raised desk.

In order to be able to connect and disconnect the power tool in the best possible way in both gripping positions, it was already proposed to place two mains switches in the bracket handle in connection with the hand-held saw.

2,67765 The further development of power tools is increasingly influenced by factors that are increasingly related to environmental friendliness and ease of use. In view of these aspects, improved radio interference suppressed, electromechanical, electrical or electronic control and regulating elements have been provided, for which a corresponding placement possibility must be available in order to place them in the power tool. It is usually the hollow handle that often offers the only option to meet these requirements.

It is easy to see that an additional second network switch - as practical as it may be for the user - requires expensive space, in addition to which complete cabling must still be taken into account. In addition to this, there are costs which, in addition to the second switch to the switching contact and its connection clamps, include additional work, such as connecting and securing the cable and checking electrical safety.

The object of the invention is therefore to provide a switching device which, in connection with an ergonomically advantageous solution with two switching buttons, enables sufficient space in the bracket handle for other control and adjustment elements and a cost-effective structure free of expensive inspection and installation work.

This object is solved according to the invention by the switching device shown in the characterizing part of claim 1. Other preferred embodiments appear from the subclaims.

Embodiments of the invention are shown in the following drawings and will be explained in more detail in connection with the drawings.

Figure 1 shows the bracket handle connected from the two shells with the cover sheath partially removed and provided with two independent switching buttons.

Figure 2 shows a simplified variant with two forcible, pivotable or longitudinally displaceable switching buttons, respectively.

Figure 3 shows a simplified variant with two forced rotary switching buttons.

3,67765

The bracket handle shown in Fig. 1 consists in this example of two shells 23 and 24 which are held together by means of detachable connections 2, 11. Attachment to the power tool 27 takes place via connections 1, 12. The handle part can then also be connected in one piece with the motor or gearbox housing. In the middle of the handle part, a net switch 10 is arranged in a known manner, which is connected to the coupling arm 9. The net switch 10 is connected to a bracket 8 on which a pivotable coupling button 17 is mounted. When the first switching button 17 is used, against the force of the spring not shown here, this shoulder 16 presses on the switching arm 9 and thus causes the mains switch 10 to engage. After releasing the first switch button 17, the spring pushes it back to its initial position and thus causes the mains switch 10 to engage. In this respect, this device is consistent with existing coupling mechanisms.

A pivoting lever 18 is mounted on the hinge point 13 in the area of the handle itself, which is also able to act on the coupling arm 9 of the net switch 10 via the gripper 14. This lever 18 is connected via a pivot rod 19 to a second switching button against the force of the clutch spring, the gripper 14 presses on the clutch arm 9 and thus causes the mains switch 10 to engage. After releasing the second switching button 3, the spring pushes this back to its initial position and thus causes the mains switch 10 to engage. Since the two switching buttons are independent of each other in their movement, the second switching button 3 is acted upon by its own spring 4, which tends to always bring it to its initial position.

The control pocket 5 of the second switching button 3 is cut outwards in such a way that an argononomically correct operation can take place with the thumb of the person operating the device. The possible impact movement of the second switching button 3 is limited by the responses 6, 7, 15 so that the switching mechanism of the mains switch 4 67765 is still operated precisely without mechanical overload.

In order to ensure against inadvertent pushing in of the second switching button 3, a locking bolt 21 loaded with a spring 22 is movably arranged inside it, which must also be pressed and which automatically returns to its locking position when disconnected.

The mechanism shown here is a four-member articulated mechanism, the operating member of which is a second switching button 3 and whose actuating member is a lever 18. This embodiment has the advantage that only the actually used switching button is moved in each case, while not pressed it remains in its rest position.

A simplified modification is shown in Fig. 2. As an exception to Fig. 1, the first engagement button 17 is then in line with the lever 18, i.e. the first engagement button is simultaneously actuated in the kinetic chain and mounted at the articulation point 13. The solution is characterized by a relatively simple structure. both toggle buttons.

While in Fig. 2 the second switching button 3 is made to move longitudinally, it is shown in Fig. 3 as a pivot lever. This solution also allows for a simple structure and is suitable for those instruments for which it does not seem absolutely necessary to use the switch button with the thumb. However, the engagement lever can be extended so that it can be operated both from the outside with the thumb and also from the inside with the index finger, as shown in the figure by the dashed line and arrows.

It can be seen from the presented embodiments that the lightweight and space-saving structure still provides sufficient structural space for other control and adjustment elements, making the structure very cost-effective by using simple injection molding, stamping and bending parts and can still be shaped so variably as possible for each application. good use of the button - for right- and left-handers in the same way - which, in the end, also means safety for the user of the instrument.

Claims (13)

1. Connector for an electrical tool with a jib handle, in which is provided a mains switch and two externally maneuverable switching pressures, the first known method of which cooperates with the mechanism of the mains switch, so that when pressed, the mains switch switches on and when switched off automatically deactivates the same, characterized in that the second coupling pressure (3) in the interior of the jumper handle is mechanically coupled to the first coupling pressure (17) or to the mechanism in the mains switch (10), so that when pressed and pressed, respectively. expressing even signs connect and resp. disconnect the mains switch and also that its push-in or switch-on switches, respectively. the emergency path is limited by stops (6,7,15) so that the mechanism of the mains switch (10) moves in the same area as prescribed for the same when it cooperates with the first switching pressure (17). Connector according to claim 1, characterized in that the second coupling pressure (3) is a driving part for a piano joint mechanism, the driven part of which has two defined dead positions. Connector according to claim 2, characterized in that the articulation mechanism consists of a four-membered kinematic chain, in which the drive part (3) performs a lifting tube relay and the driven part (18) a pivoting movement. Connector according to claim 2, characterized in that the articulation mechanism consists of a four-membered kinematic chain, in which the drive part (3) performs a pivoting movement and the driven part (18) a lifting or pivoting movement. Connector according to any one of claims 1-4, characterized in that the mains switch (10) is provided in a known manner with a coupling piston (9) which is located beyond the driven part (18) and that the driven part (18) in the operating area of said clutch piston (9) has a carrier (14). Connectors according to any one of claims 1-4, characterized in that the driven part (18) is provided with brackets or shafts (25), which are located outside the mains switch (10) and that the mains switch (10) is in the operating range for said brackets respectively. hai (25) has a carrier (26). Connectors according to any one of claims 1-6 »characterized in that both coupling pressures (3,17) are located