WO1997009706A1

WO1997009706A1 - Operational-status indicator

Info

Publication number: WO1997009706A1
Application number: PCT/DE1996/001155
Authority: WO
Inventors: Hubert Behr; Günter RÖSNER
Original assignee: Siemens Nixdorf Informationssysteme Ag
Priority date: 1995-09-07
Filing date: 1996-06-28
Publication date: 1997-03-13
Also published as: GR3031856T3; EP0847570B1; ES2138355T3; DE59603098D1; EP0847570A1; NO980792L; NO980792D0; ATE184724T1; KR19990044437A; DE19533099A1; TW303445B

Abstract

The invention concerns a device designed for the visual indication of two statuses. The device includes a small motor fitted in a cylinder with its spindle fixed to the housing. When the motor is supplied with current from a high-resistance power supply, the cylinder is rotated against the action of a spring and a coloured zone is moved out into a position in which it is visible behind a window, this rotational motion being limited in each direction by stops. Alternatively, the stops may be designed as permanent magnets and the motor supplied with pulsed current.

Description

Operating status display

Technical field

The invention relates to an arrangement for displaying an operating state of a device.

State of the art

To indicate that, for example, a customer's machine is ready for operation, a large number of electrically operable displays are known, in particular those with incandescent lamps or light-emitting diodes. These have the advantage that the display also goes out if the device fails. However, such a display is not recognizable in sunlight and is limited to a colored area in a simple design.

Also known are displays in which an object is mechanically shifted under a window by means of a lifting magnet or motor, so that an area of a different color or writing is visible. This requires a mostly complex mechanism. In addition, when operating with solenoids, not inconsiderable power is consumed during the display, especially if the display is to be large. If, on the other hand, a motor is used, a gearbox and limit switch are necessary, and if the power supply fails, a forced reset must be initiated using complex technology.

The object of the invention is to provide a display which is simple to produce, can be implemented over a large area, consumes little power in the activated state and automatically switches to the inactive state in the event of a power failure. Presentation of the invention

The invention consists of an arrangement for the optical display of two states, in which a small direct current collector motor is inserted in a roller, is non-positively connected to it and its axis is connected to the housing which comprises the roller , wherein the roller is rotated by energizing the small motor and another segment on the roller is thus visible through a viewing window.

In a first embodiment, the small motor is fed from a current source of high internal resistance and rotated against a spring force. In the event of a power failure, the spring force returns the roller to the idle state.

A second embodiment only requires a current flow through the motor for the adjustment. Here, permanent magnets are used, which serve as stops for the rotation of the roller and hold the roller in the respective position by means of an iron plate striking against it. The energy for resetting is stored in a capacitor and supplied to the motor when the control voltage is switched off.

Brief description of the drawings

Show it

Fig. 1 shows a cross section through the display and

2 shows a longitudinal section,

3 shows a circuit for the reset in the second embodiment,

Fig. 4 shows a circuit for the control with dynamically low internal resistance. Detailed description of the invention

Fig. 1 shows a cross section through a display device according to the invention. 2 shows the corresponding longitudinal section. A housing 10, which is shown in FIG. 1 as a cylinder with a base, contains a cylindrical cavity and a window 14. The outer shape of this housing can vary many times without influencing the function.

In the cylindrical cavity there is a half cylinder 11 which is rotatably mounted. On its outer surface there are two different fields 17 and 18 which can be brought under the window 14 by rotating the half cylinder 11. Two stops 15 and 16 limit the rotation of the half cylinder 11, so that one of the fields 17, 18 is visible from the outside through the window 14. A spring 19 rotates the half cylinder in the direction of the stop 15, so that the field 17 is visible through the window 14 in the idle state. The two fields 17, 18 differ in their color or in lettering such as "ready" or "out of order".

The half cylinder 11 has a concentric cylindrical cavity inside, which is closed at both ends by semicircular segments which have bores 25 along the axis of the half cylinder. A small motor 12 with a cylindrical outer housing is attached to one end of the half cylinder 11. The inside diameter of the half cylinder is only slightly larger than the outside diameter of the motor 12, so that it is non-positively connected to the half cylinder 11, for example by an adhesive 21. The axis 13 of the motor 12 protrudes through the axial bore 25 of the half cylinder 11 into a bore of the housing 10. A fixation 23 fastens the axis 13 of the motor 12 to the housing 10. Thus, the axis 13 of the motor 12 is non-positively connected to the housing , but rotatable in the bore 25 of the half cylinder 11. By energizing the motor 12, a torque between the housing 10 and half cylinder 11 causes. With a suitable polarity, the half-cylinder 11 is rotated against the moment of the spring 19 up to the stop 16, so that the second field 18 is visible in the window 14. By operating the motor on a voltage source with a high internal resistance, for example via a series resistor, sufficient torque is created for the rotation, but the current through the motor is limited so that continuous current supply is possible without inadmissible heating of the motor. In the event of a power failure, the torque is also eliminated, so that the half-cylinder rotates back into the rest position due to the torque of the spring 19. The motor is connected by flexible connecting strands 22 since its rotary movement is less than 360 °. In a variant of this arrangement according to FIG. 4, a series resistor 36 with a capacitor 35 connected in parallel is used, so that there is a statically high, but a dynamically low internal resistance of the current source. Alternatively, a motor with a much larger nominal voltage than the applied operating voltage can be used, so that the current flowing at a standstill is less than the nominal current of the motor when moving. For example, a motor with 24V nominal voltage and 5V operating voltage can be used.

A second bearing point 24 is provided on the end of the half cylinder opposite the motor 12. Alternatively, a second motor of the same type as on the opposite side can also be used as a bearing and optionally supplied with current.

In another embodiment, the two stops 15 and 16 are designed as permanent magnets. The half-cylinder has soft iron plates at the points that abut the stops 15 and 16, which are not shown in the figures. These are attracted to the respective permanent magnet stop when they are close to it. This means that the idle and display positions are retained even when the motor is not powered. A spring 19 can continue be in place to support the deferral; however, it must be dimensioned such that the force exerted by it is certainly less than the holding force of the soft iron plate at the stop 16 minus the forces caused by vibrations.

A series connection of a capacitor with the small motor is used to control this arrangement. The on / off switch edge is differentiated by the capacitor and leads to a current pulse through the motor, which thereby rotates the half-cylinder 11 in the other direction against the stop 15 or 16, the respective position being determined by the permanent magnetic Stops 15 and 16 is fixed.

If no sufficiently fast switch-on or switch-off edges are secured, the circuit according to FIG. 3 provides them. The small motor 12 is connected in series with a capacitor 35 at the common pole of a changeover switch 33 and at a reference potential which is connected to the rest pole of the changeover switch 33. The working pole of the changeover switch 33 is connected via a diode 34 to the input voltage, which is simultaneously connected to a relay 32 which operates the changeover contact 33. If this arrangement is connected to a suitable voltage, the relay picks up after the tightening voltage has been reached. The changeover contact thus switches the motor 12 to this voltage via the capacitor 35. The charging current of the capacitor 35 flows through the motor and causes the half-cylinder 11 to rotate as far as the stop 16. After the capacitor has been charged, no more current flows through the motor, but only the current through the relay. Its current consumption can be further reduced in a known manner by a capacitively bridged series resistor.

If the input voltage is reduced to such an extent that the holding current of the relay 32 is undershot, this drops and the capacitor is released via the quiescent pole and the motor. load. The current caused by the motor causes a rotation in the opposite direction to the stop 15. The energy for this is stored electrically in the capacitor 35. The diode 34 prevents the capacitor 35 from being discharged and thus improves the switch-off behavior. It prevents the capacitor from discharging through the relay and only the energy remaining in the capacitor when the relay drops out is available for the reset process. It can be omitted if the relay is dimensioned and the capacitor is chosen large enough that the energy stored in it at the drop voltage of the relay is sufficient to separate the roller 11 from the stop 16 and to turn it to stop 15.

If the spring 19 is also used in this variant with magnetic stops in order to accelerate the resetting, a resistor 37, which is shown in broken lines in FIG. 3, can be connected in parallel with the capacitor. A quiescent current is thus set, which produces a moment opposite to the moment of the spring. The relay must be selected so that, as described above, the diode 34 can be omitted, since the capacitor discharges through the resistance when the operating voltage drops.

Claims

claims

1. Arrangement for display with the features:

A partial cylinder (11) is rotatably mounted in a housing (10) with a transparent window (14) and a cylindrical cavity, so that the main axis of symmetry of the cavity and the partial cylinder (11) are the same, the outside of the partial cylinder (11 ) has two areas (17, 18) of different patterns, which by rotating the partial cylinder (11) under daε

Window (14) can be brought, a spring (19) exerts a torque on the part cylinder (11) in the direction of a first stop (15), which limits the rotary movement in such a way that the first area (17) is underneath the window

(14), the inside of the partial cylinder (11) is non-positively connected to the outside of a motor (12), - an axis of the motor (12) is non-positively connected to the housing (10), the motor (12 ) is switched in such a way that energization generates a torque which is greater than and opposite the torque of the spring (19) and acts in the direction of a second stop (16) which limits the rotary movement in such a way that a second region (18) is under the window (14).

2. Arrangement according to claim 1, wherein the motor is a direct current collector small motor which is operated at a voltage which is substantially below the nominal voltage of the motor, so that the current at standstill is less than the nominal current.

3. Arrangement according to claim 1, wherein the motor is a direct current collector small motor, which is also a direct current Voltage source is fed with at least statically high internal resistance.

4. Arrangement for display with the features:

In a housing (10) with a transparent window (14) and a cylindrical cavity, a partial cylinder (11) is rotatably mounted so that the

Main axis of symmetry of the cavity and that of the

Partial cylinder (11) are the same, the outside of the partial cylinder (11) has two areas (17, 18) of different patterns, which by rotating the partial cylinder (11) under the

Windows (14) can be brought, the inside of the partial cylinder (11) is non-positively connected to the outside of a motor (12), an axis of the motor (12) is non-positively connected to the housing (10), a rotation of the Partial cylinder (11) is by two

Stops (15, 16) made of permanent magnetic material limited, the partial cylinder on the

Contact points to the stops (15, 16) is equipped with ferromagnetic material.

5. Arrangement according to claim 4, wherein the motor (12) is a direct current collector small motor which is connected in series with a capacitor (35).

6. Arrangement according to claim 5, wherein the series connection of the capacitor (35) with the motor (12) is short-circuited via a changeover contact (33) actuated by a relay (32) when the relay is de-energized and when the relay (32) is energized via the changeover switch (33 ) is connected to the voltage at the relay (32).