DE2748869C3 - Device for interrupting the circuit of electrically powered typewriters and other office machines - Google Patents

Description

The invention relates to a device / to interrupt the circuit of electrically driven Write or similar office machines in the generic term of claim 1 specified type.

For office machines, especially booking and calculating machines with machine cladding. the one Have hinged or removable hood cover, switch assemblies are provided that open the machine's flow circuit when removing the hood and when putting on the lid close again.

An embodiment of such a device has become known (DE-OS 23 35 582), in which on A hood cover is attached which, when the cover is closed, goes into the cladding hood.

protrudes and at its end a cam is arranged, which is in a recess of a pivoted Latching lever engages, the same with the cooperation of a Koniakthebels and a release lever Microswitch actuated. This solution of the Konuiktunter brechungseinrichiung largely fulfills the Requirement of safety in the workplace, however, is complicated in construction as well as handling because the circuit after closing the I laubendeci eis ersi after pressing a function key over an indentation length can graze closed. In addition, there is a special closed solution for the ['all one Repair or normal maintenance work is planned with the hood open.

It is also a device for breaking the circuit for electrically powered typewriters known (DE-OS 14 36 748), in which when flapping a cladding hood cover Spring-loaded visual slide operated which in turn acts on a microswitch. The slide switch works with a pawl together, by removing the cover is lifted out of its locking position and the interruption of the operational readiness of the Machine causes. However, it is disadvantageous that when the machine is subsequently started up, after re-opening the casing cover. each press a pushbutton / u times. Another disadvantage of this solution is that it is at removed cover is possible. the Operating instructions of the machine by hand, too unintentionally to establish. Also with this Establish the one / one functions. like /.B. »On«, »Off« etc. can be set with a relatively large number of files. Therefore The production is complex.

The invention is therefore based on the object of providing an im Construction of a simple and reliable working facility / to break the electric circuit with service position / u create, which also handle einf.iui / u isl and the VDE safety regulations eriulii.

The problem posed is achieved in accordance with the subject matter of the characterizing file of claim 1.

An example of implementation is shown in the drawing Contacting facility according to the invention illustrated in I described below. It shows

I ig I a front view of the Unlerbrechiingsem direction;

I ι j! 2 emi side view of the device according to FigL

I ig. 3a Delaildes Aufsal / es mil Kreii / schht /.

Λπ the flour shown frame of a / H. typewriter A base plate 1 is fixedly arranged under the cover shown in the flour of the machine, who carries a Konlaklunlerbrcchliing which With a hood that can be swiveled up or removed, the hood 20 protrudes in a straight line Finger 21 is given away, this works together for sure unit interruption device comprises one in the circuit of the electric drive motor (not shown) the typewriter lying micro-sounder 15 with resilient switch lever 16, one with a upper guide slot3 and a lower guide slot 4 provided switch slide 2, which at Fuhrüngsbolz.cn 3s or 4 · 7 is vertically movable.

The Schaltschicber 2 is under the constant train of a coil spring 7, which strives to the switch slide move up. At its lower end, the slide switch 2 has the microswitch

15 facing ropes a Cjleiikanie 5, which has a recess ο and on which the switching lever 16 of the microscope holder 15 rests with a roller 17. Three positions of the switching lever 16 of the micro-sounder 15 can be reached via this (jkitkiinte 5 and recess 6, and / was closed-door position A, open position ß and service position C.

In addition to the two Rihrungsschlit / s 3, 4, the Slide switch 2 in its central part an elongated cutout 13 through which one in the vicinity of the lower guide bolt 4.7 in the base plate 1 at point 10.7 anchored leaf spring 10 passes through which at at its upper end has an I! altebol / en 11, which is inserted into the guide slide / 3 de, slide switch 2 engages and with the lid 20 open, where the slide switch 2 is brought into the open position ß by the spring 7 has been prevented its temporary upward movement.

At the upper end of the base plate 1 an angular top / 8 is attached, which has two intersecting slips / c 9, of which the slide / 9.7 serves as a passage opening for the slide switch 2 and the slide / 9 /) / for the insertion of the cover finger 21. For tolerance / compensation / wiping of the lid and the machine, the attachment 8 can be adjusted and locked on screws 8.7. Due to its geometric arrangement and the narrowness of the slots, the Aufsat / 8. Prevents the .Switch slide 2 from being pushed into the closed position Λ with the VDE test finger.

To reach the service position C , the hood cover 20 is opened and thus the switch switch 2 or the microswitch 15 is brought into the open position B. Then the retaining bolt 11 and with it the leaf spring 10 are pushed away by means of the tool IV through the opening 12 in the base plate 1 and through the guide slot 3 in the direction of the arrow until the bolt 11 no longer touches the slide switch 2 on the lower edge of the guide slot 3 stop and the

to slide switch is pushed further up by the tension spring 7. As a result, the shift lever 16 of the Microswitch 15 brought into the service position ('. The bolt Π the The leaf spring 10 slides on the slide switch 2.

If the hood dome 20 is closed again, the slide 2 is pressed down by the cover finger 21 and thus brought into the closed position Λ via the open position β. During this pressing down, the retaining bolt 11 is pressed again into the guide lock 3 of the slide switch 2 so that the next time the lid 20 is opened, the valve 2 is again held in the open position by the bolt 11.

The advantages achieved by the invention are in particular that the Konuiki- according to the invention

2Ί uninterruptible device also a secured service position and all other functional positions. even releasing the service position, in the simplest way Way can be achieved by opening and closing the hood cover 20 without further I land grips.

For this purpose 2 sheets of drawings

Claims (3)

Patent claims: 1. Device for interrupting the circuit of electrically powered typewriters or similar office machines, with a hinged cover, a spring-loaded switch slide / ur actuation of a microswitch that can be swiveled upwards from this cover cover and a holding device which interacts with the switch slide and which is held against the by hand Can be disengaged by the force of a spring, characterized in that the slide switch (2) guided displaceably on a base plate (1) is provided with an upper guide slot (3) for the holding device designed as a holding bolt (11), the (11), is befindend at the lower end of the slot, the switch slide (2) in the circuit interrupting with the cover open (20) open position (B) ha \ i and by means of a Fedf ^<r (10) in such a manner on the base plate (I) arranged .st that it is to release the slide switch (2) additionally guided in a lower guide slot (4) in e A service position (C) that closes the circuit with a tool (W). that is smaller than the VDF. Test finger, can be pushed away from the upper guide slot through an opening (12) in the base plate (1). so that the switch slide (2) is moved to the service position (C ) by the tension spring (7) and, when the cover (20) is closed again, directly to the open position (H) to the closed position (A) brought wiiu. 2. Device for .'Jnterbi chen the circuit according to claim 1. diJurch characterized in that an adjustable attachment (8) with a cross slot (9) is provided on the end of the slide switch (2) facing the cover (20) /.n, One of the slits (9, -j.) serves as a slide passage opening and the other slit 19b ) serves to finish the lid finger (21). 3. Device / to interrupt the circuit according to claims I and 2. characterized in that the Schalischiebcr (2) on the / with Mikroschallcr (15) facing side has an edge (5, 6) designed in such a way that the adjacent shift lever (16 ) of the microswitch (15) determines the closed, open and service position (A. Ii. C) of the microswitch (15) depending on the position of the slide switch (2).