KR19990044437A - Operation status indicator - Google Patents

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

Operation status indicator

Many display devices with incandescent lamps or light-emitting diodes are known, for example, for indicating that a customer vending machine is ready for operation. The display device has the advantage that the display device is turned off together in case of failure of the mechanism. However, the display device of the above type cannot be recognized in sunlight, and in a simple embodiment, it is limited to only one color.

Display devices are also known in which one object is mechanically moved under a window by an electro-lifting magnet or motor, whereby areas of different colors or letters may appear. In such a device, a costly mechanical device is required. In addition, in the operation by the electro-lifting magnet, power which is never small during display is consumed, especially when the area of the display device is large. On the other hand, if a motor is used, a gear and a limit switch are required, and if a power supply is broken, a forced return device having a high technical cost is inevitably introduced.

The present invention relates to an apparatus for displaying the operating state of an instrument.

1 is a cross-sectional view of a display device,

2 is a longitudinal cross-sectional view of the display device;

3 is a circuit diagram for returning the display device of the second embodiment;

4 is a circuit diagram of a control device with dynamically low internal resistance.

It is an object of the present invention to provide a display device that is simple to manufacture, which can be implemented in a large area, consumes a small amount of power in an operating state, and automatically switches to an inoperative state when the current supply is interrupted.

The present invention consists of a device for visually displaying two states, in which a direct current collector-small motor is inserted into a cylinder and non-positively coupled with the cylinder, and the spindle of the cylinder is configured to engage with the housing. The cylinder is rotated by applying a current to the small motor, thereby visually identifying the other segment shown on the cylinder through one viewing window.

In the first embodiment, a small motor consisting of one current source is provided with a high internal resistance, and the motor is rotated in opposition to spring operation. When the current supply is interrupted, the cylinder is returned to the stopped state by the spring actuation.

In the second embodiment a current flow through the motor is needed only for setting. In this embodiment, a permanent magnet is used which is used as a stopper for stopping the rotation of the cylinder and which fixes the cylinder in each state by the iron plate in contact with the stopper. Energy for the return state is accumulated in the capacitor and supplied from the capacitor to the motor when the set voltage is interrupted.

1 is a cross-sectional view of a display device according to the present invention. 2 is a corresponding longitudinal section view. The housing 10, shown as cylinder with feet in FIG. 1, includes one cylindrical cavity and one window 14. The outer shape of the housing may be variously modified within a range that does not affect the function.

Within the cylindrical cavity there is one half cylinder 11 rotatably supported. On the outer surface of the half cylinder there are two different panels 17 and 18 which can be moved under the window 14 by the rotation of the half cylinder 11. Two stoppers 15 and 16 limit the rotation of the half cylinder 11, so that each panel 17, 18 can be seen through the window 14 from the outside. One spring 19 rotates the half cylinder 11 in the direction of the stopper 15 so that the panel 17 can be seen through the window 14 in a stationary state. The two panels 17 and 18 are distinguishable by color or by letters such as "start" or "end".

The half cylinder 11 comprises a cylindrical cavity arranged concentrically therein, and both ends of the cavity end with semi-circular segments comprising a bore 25 along the spindle of the half cylinder. At one end of the half cylinder 11 is provided a small motor 12 having a cylindrical outer housing. As the inner diameter of the half cylinder is only slightly larger than the outer diameter of the motor 12, the motor is non-positively coupled with the half cylinder 1 by, for example, an adhesive portion 21. The spindle 13 of the motor 12 penetrates through the axial bore 25 of the half cylinder 11 and protrudes into the bore of the housing 10. The fixing part 23 couples the spindle 13 of the motor 12 with the housing 10. Thereby the spindle 13 of the motor 12 is non-positively coupled with the housing but rotatable within the bore 25 of the half cylinder 11. The torque acts between the housing 10 and the half cylinder 11 by supplying a current to the motor 12. At a suitable polarity, the half cylinder 11 is rotated against the moment of the spring 19 until it reaches the stopper 16, so that the second panel 18 can be seen in the window 14. If a high internal resistance is provided to the voltage source, for example through a protective resistor, by the operation of the motor, a sufficient moment acts for rotation, but the current is limited by the motor, resulting in a current that does not heat the motor. It can be supplied continuously. Since the torque is also lost when the current supply is cut off, the half cylinder is rotated back to the stopped state by the torque of the spring 19. The motor is connected by a flexible connecting copper wire 22 because the rotational motion of the motor is smaller than 360 °. In the variant of the device according to FIG. 4, the protection resistor 36 with the capacitors 35 connected in parallel is used, thereby forming a statically high but dynamically low internal resistance of the voltage source. Alternatively, a motor with a rated voltage much larger than the applied operating voltage can also be used, which results in a lesser amount of current flowing in the stationary state than the rated current of the motor in operation. For example, a motor with a rated voltage of 24V can be used at an operating voltage of 5V.

On the end of the half cylinder on the opposite side of the motor 12 there is a second support point 24. Instead, the second motor can also be used as a bearing in the same way as on the opposite side and can optionally be supplied with current.

In another embodiment the two stoppers 15 and 16 are formed as permanent magnets. The half cylinder includes a wrought iron plate, not shown in the drawing, at the place where it hits the stoppers 15 and 16. Soft iron plates are attracted by each permanent magnet-stopper when the plate is close to the permanent magnet stopper. Thus, the stop state and the display state are maintained without supplying current to the motor. Spring 19 may also be provided to support the reverse state; However, the spring is designed so that the force exerted by the spring is less than the bearing force of the soft iron plate in the stopper 16 after subtracting the force caused by the vibration.

A capacitor series circuit with a small motor is used to control the device. By means of the capacitor the connecting edge or the non-connecting edge is distinguished and guided by a motor with a current pulse, whereby the motor rotates the half cylinder 11 with stoppers 15 and 16 in different directions, respectively The state is fixed by the permanent magnet stoppers 15 and 16.

If a sufficiently fast connection edge or disconnection edge is not guaranteed, the circuit according to FIG. 3 prepares the connection edge or disconnection edge. The small motor 12 is arranged in series with the capacitor 35 at the common pole of the changeover switch 33 and at a reference potential connected to the stop pole of the changeover switch 33. The operating pole of the changeover switch 33 is connected with an input voltage via a diode 34, which is applied to the relay 32 which simultaneously activates the changeover contact 33. When the device is applied to a suitable voltage, the relay picks up after the start voltage is reached. The switching contact thereby connects the motor 12 to the voltage via a capacitor 35. The charging current of the capacitor 35 flows through the motor and affects the rotation of the cylinder until the half cylinder 11 reaches the stopper 16. After the capacitor is charged, the current no longer flows through the motor, only through the relay. The current use of the motor can be further reduced in a known manner by capacitively bridged protective resistors.

When the input voltage is reduced to such an extent that the holding current of the relay 32 falls short, the relay drops and the capacitor is discharged through the stop pole and the motor. The inrush of current through the motor caused thereby causes a rotation to the opposite stopper 15. For this purpose, energy is electrically stored in the capacitor 35. Diode 34 prevents the discharge of capacitor 35, thereby improving the switch-off characteristic. The diode prevents the capacitor from discharging through the relay so that only the energy remaining in the capacitor when the relay descends is used for the recovery process. If the size of the capacitor is selected so that the energy accumulated in the capacitor is sufficient to separate the cylinder 11 from the stopper 16 and rotate it to the stopper 15 when the voltage of the relay drops, the diode may be absent if the relay is designed. .

If the spring 19 is also used in addition to the magnetic stopper in this variant to accelerate the recovery state, the resistor 37 shown in broken lines in FIG. 3 can be connected in parallel to the capacitor. Thereby, a quiescent current is set which causes a moment opposite to the spring moment. As described above, the relay can be selected so as to eliminate the need for a diode because the capacitor is discharged by the resistance when the operating voltage drops.

Claims (6)

The partial cylinder 11 is rotatably provided in a housing 10 having a transparent window 14 and a cylindrical cavity, such that the main symmetry axis of the cavity and the main symmetry axis of the partial cylinder are the same, The outer surface of the partial cylinder 11 comprises two regions 17, 18 of different pattern, which regions can be moved under the window 14 by the rotation of the partial cylinder 11, A spring 19 applies a torque on the partial cylinder 11 in the direction of the first stopper 15, the stopper restricting the rotational movement such that the first region 17 is arranged under the window 14. , The inner surface of the partial cylinder 11 is non-positively coupled with the outer surface of the motor 12, The spindle of the motor 12 is positively coupled with the housing 10, The motor 12 is connected such that a torque greater than the torque of the spring 19 and opposite the torque and acting in the direction of the second stopper 16 forms a current supply, the second stopper being connected to the second region. A display device for restricting the rotational motion such that the 18 is disposed under the window 14. 2. A display device as claimed in claim 1, wherein the motor is a DC-collector-small motor which is operated at a voltage substantially below the rated voltage of the motor, so that the current in the stationary state is less than the rated current. The display device according to claim 1, wherein the motor is a DC-collector-small motor supplied with at least statically high internal resistance from a constant voltage source. The partial cylinder 11 is rotatably provided in a housing 10 having a transparent window 14 and a cylindrical cavity, such that the main symmetry axis of the cavity and the main symmetry axis of the partial cylinder are the same, The outer surface of the partial cylinder 11 comprises two regions 17, 18 of different pattern, which regions can be moved under the window 14 by the rotation of the partial cylinder 11, The inner surface of the partial cylinder 11 is non-positively coupled with the outer surface of the motor 12, The spindle of the motor 12 is positively coupled with the housing 10, The rotation of the partial cylinder 11 is limited by two stoppers 15 and 16 made of permanent magnet material, in which case a ferromagnetic material is provided at the place of the partial cylinder in contact with the stoppers 15 and 16. Display device. 5. A display device according to claim 4, wherein the motor (12) is a DC-collector-small motor connected in series with a capacitor (35). The series connection of the motor 12 and the capacitor 35 is short-circuited through the switching contact 33 operated by the relay 32 in the non-current relay, and in the relay 32 to which the current is supplied. And a voltage applied to the relay (32) via a changeover switch (33).