JPS589430B2 - display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for displaying scores, elapsed time, etc., for example in a stadium.

Conventionally, there are display means that display desired numbers, pictures, etc. using 7 or 8 segments.

Each segment of this display means is a rotating body that is rotatably supported, and the rotational driving means for this rotating body includes a permanent magnet provided in a part of the rotating body and a permanent magnet provided adjacent to the permanent magnet. It consists of an electromagnet device.

By reversing the magnetic poles of this electromagnetic device,
This rotating body is rotated.

However, in order to apply the above driving means to large-sized display means installed in stadiums, a large permanent magnet and an electromagnetic device to excite this magnet are required. Instantaneous large currents are required.

Furthermore, since the positioning of the rotating body is done by colliding a part of the rotating body with a positioning member to stop the rotating body, the noise generated at the time of impact is very large.

Therefore, the present invention eliminates the above-mentioned drawbacks and is particularly suitable for use as a large-sized display device.

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a rotary display cylinder 1 has its outer peripheral surface divided into at least two color-coded sections parallel to its axis, as is well known.

Shafts 2 and 3 protrude from both ends of the display cylinder 1 in the direction of extension of their axes, and are rotatably supported by bearing plates 4 and 5, respectively.

An intermediate gear 6 is attached to the shaft 3, and this gear 6 meshes with a pinion 8 of a motor 7.

A permanent magnet 9 is fixed inside the rotary display cylinder 1, and a reed switch 10, 11 is provided at a position where it can be magnetically coupled to the magnet 9 and opposite to it.

The motor 7 is an inductor type motor, and as shown in the second diagram, an AC power source (commercial power source) 12 is connected to the drive coils 14 and 15 of the rotor 13 constituting the motor 7 via diodes 16, respectively. The drive coil 14 is connected to the power source 12 via a capacitor 17 for shifting the phase, thereby forming a closed loop.

A second switch 18 is connected in parallel with the diode 16.
A first switch 18a is provided in parallel with the capacitor 17.

The switches 18 and 18a are alternately opened and closed, and when one is open, the other is closed.

The operation of opening the switch 18 and closing the switch 18a is performed by either one of the reed switches 10 and 11.

By the way, in the case of the state shown in the second figure, that is, the switch 18
is open and the switch 18a is closed, the current half-wave rectified by the diode 16 flows into the drive coil 14,
It's running on 15.

Therefore, the rotor 13 of the motor 7 does not rotate due to the electromagnetic brake action.

Next, when the switch 18 is closed and the switch 18a is opened, current flows to the first drive coil 14 and to the drive coil 15 via the capacitor 17.

Therefore, a phase shift occurs between the drive coils 14 and 15, and the rotor 13 rotates.

Next, to explain the operation of the present invention, it is assumed that the switch 18 is closed and the switch 18a is opened from the state shown in the second figure.

Therefore, the rotor 13 of the motor 7 starts rotating, and the pinion 8
, rotates the rotation display cylinder 1 via the gear 6.

Therefore, the magnet 9 mounted within the rotary display cylinder 1 is close to and faces the reed switch 10.

Therefore, reed switch 10 is closed, switch 18 is opened via means such as a relay, and switch 18a is closed again.

Therefore, an electromagnetic brake acts on the rake 13 to stop it.

Since the present invention has the above-mentioned configuration, even if it is used as a dog-shaped display device, a large permanent magnet or excitation means is not required, and a large instantaneous current is not required.

Further, the rotary display barrel can be rotated and stopped very reliably, and no mechanical impact noise is generated when it is stopped.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway sectional view, and FIG. 2 is an electric circuit diagram. 1... Rotation display cylinder, 7... Motor, 9... Magnet, 10
．． 11...Reed switch, 12...AC power supply, 13...
...Roke, 14.15...Drive coil, 16...Diode, 18...Second switch, 18a...First switch.

Claims (1)

[Scope of Claims] 1. A rotating display cylinder having a plurality of display surfaces, a motor that rotationally drives the rotating display cylinder, and between one end of two drive coils of the motor and one terminal of an AC power source. and a first switch that is interposed between the other end of one of the drive coils and the other terminal of the AC power source and that is opened and closed by the output of the detection device. A second switch connected in parallel to the diode and having different open/close states from the first switch, a permanent magnet fixed to the rotating display cylinder, and a permanent magnet magnetically coupled to the first switch at a position that allows and are placed facing each other,
A display device comprising a pair of reed switches that open and close the first and second switches, and a capacitor connected in parallel to the first switch.