JPS642261B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for using a public telephone or the like that uses an auxiliary power source such as a commercial power source or a battery, when the power from the auxiliary power source is cut off and general calls cannot be made.
This invention relates to a self-holding display for indicating this to the user.

For conventional public telephones that use only commercial power as an auxiliary power source in addition to the central office power source, if the commercial power supply goes out, the fraud processing control unit will stop functioning and you will not be able to make general calls. Equipped with an indicator for displaying information.

Figures 1a and 1b show this type of display, with magnetic poles 4 of an electromagnet consisting of an exciting coil 1, an iron core 2 and a yoke 3.
An armature 6 rotatably supported by a shaft 5 is attached at a position facing the The excitation coil 1 is energized by input from the power supply, the armature 6 is attracted, and the out-of-service display board 7 is rotated around the shaft 5, and the out-of-use display board 7 is displayed as shown in FIG. 1a. If the armature 6 and out-of-use display plate 7 continue to be positioned outside the window 8, and the power supply from the commercial power source is cut off, the armature 6 and out-of-service display plate 7 will be rotated by gravity around the shaft 5 to the position shown in Fig. 1b. A device was used in which a display window 8 displayed a display indicating that the device had been discontinued. In this type of device in which the out-of-use display board 7 is moved, it is necessary that the out-of-use display board 7 can be moved over a large distance.

However, recently, public telephones that use a battery as a second auxiliary power source in addition to the commercial power source have been considered as a countermeasure against a power outage of the commercial power source. For such public telephones, if a power outage occurs while using commercial power as the first auxiliary power source, the connection of the auxiliary power source is automatically switched so that power is supplied from the battery as the second auxiliary power source. However, if the battery voltage drops below the specified value while the battery is in use and the function of the storage control unit is about to stop, the small amount of power remaining in the battery will automatically display the stoppage of use. There is a need for a usability indicator that can indicate whether the device is usable or not, and which can automatically restore the usability display with a small amount of power when the battery voltage returns to a specified value or higher due to battery replacement.

This invention was made in consideration of the above points, and relates to a public telephone that uses a battery as an auxiliary power source.
If the battery voltage drops below the specified value while the battery is in use, the small amount of power remaining in the battery can automatically indicate that the battery has stopped using the battery, and the battery voltage can be returned to above the specified value by replacing the battery. Even when the phone is in use, the power consumption is extremely low, as the ready-to-use display can be displayed using only a small amount of electricity, and the structure is simple, so even if shock vibrations are applied to the phone, it will continue to display the specified display without malfunctioning. The purpose of the present invention is to provide a self-holding display device for public telephones, etc., which displays a new usability indication. The invention will now be described in detail with reference to the drawings.

FIGS. 2, 3, and 4 show an embodiment of a self-holding display for a public telephone or the like according to the present invention. In these figures, a first winding 20a and a second winding 20b are wound on an iron core 21 made of electromagnetic soft iron plate bent into a U-shape to form an electromagnet 17, and the first winding 20a and second winding 20
The terminal ends of b are connected to terminals 22a and 22b, respectively. At both ends of the U-shaped iron core 21 are first yokes 23 each made of an electromagnetic soft iron plate.
The second yoke 24 is fixed so that its magnetic pole faces 23a and 24a are positioned opposite each other, and a relatively large fan-shaped magnetic gap 33 is formed between the magnetic pole faces 23a and 24a. For example, when direct current is applied to the first winding 20a, it is excited so that an S pole is generated on the magnetic pole surface 23a and an N pole is generated on the magnetic pole surface 24a, so that lines of magnetic force that cross the magnetic gap 33 are generated. Further, for example, when direct current is applied to the second winding 20b, it is excited so that an N pole is generated on the magnetic pole face 23a and an S pole is generated on the magnetic pole face 24a, and lines of magnetic force in the opposite direction to the above case are generated in the magnetic gap 33. It is installed as it occurs. In addition, the shaft 2 planted on the substrate 25
8, the lever 27 is made of a non-magnetic material and has a small inertial mass and is supported almost near the center of gravity so as to be able to reciprocate and rotate freely.
A display board 26 having a first display surface 26a and a second display surface 26b is fixed to one end, and an L-shaped member 29 magnetized by a permanent magnet 30 or the like is attached to the other end of the lever 27. , member 29
The end portion 29a is located within the fan-shaped magnetic gap 33 formed between the magnetic pole surface 23a and the magnetic pole surface 24a, and when the lever 27 reciprocates around the shaft 28, the magnetic pole surface 23a and the magnetic pole surface 24a It is attached so that it can be freely displaced between the Further, the member 29 magnetized by the permanent magnet 30 has its end 2
9a is magnetized so that either a north pole or a south pole is generated. Further, the first display surface 26a and the second display surface 26b of the display board 26, which display whether or not a general call can be made, are attached to positions facing the display window 32 provided in the telephone housing 31, and the lever 2
7 is rotated about the shaft 28, for example, when the end 29a of the member 29 is held in contact with the magnetic pole surface 24a by the attractive force acting between the member 29 and the magnetic pole surface 24a. As shown in FIGS. 5 and 6, the second display surface 26b indicating that general calls are available appears in the display window 32, and the attraction acting between the end 29a of the member 29 and the magnetic pole surface 23a. When the first display surface 26a is held in contact with the magnetic pole surface 23a by force, the first display surface 26a, which displays whether or not to make a general call, is attached so as to appear within the display window 32, as shown in FIGS. 7 and 8. . In addition, the shape of this display is designed considering that it will be installed inside a public telephone.
It is constructed in a flat shape so that it can be mounted in a small space between component parts.

FIG. 9 shows an example of a display circuit for driving and controlling a self-holding display of a public telephone or the like according to the present invention, and 19a and 19b are the outputs of a commercial power supply 10 consisting of a power supply 10a, a power transformer 10b, and a rectifier 10c. Terminal, 11 is battery, 12 is for monitoring commercial power supply
NV relay, 13 is a changeover switch consisting of the contact NV ₃ of the commercial power supply monitoring NV relay 12, and 14 is a battery compartment switch consisting of a contact SW provided in the battery compartment, which is released when the door of the battery compartment is opened. 15 is a currency processing control unit consisting of LSI etc.;
6 is a display circuit for driving and controlling this display; 1
Reference numeral 7 denotes an electromagnet of this display, which has a first winding 20a and a second winding 20b. Reference numeral 18 denotes a voltage monitoring circuit that monitors the voltage applied to the currency processing control section 15. Moreover, in FIG. 9, TR ₁ , TR ₂ ,
TR ₃ , TR ₃ , TR ₄ and TR ₅ are transistors,
ZD is a Zener diode, C ₁ and C ₂ are capacitors,
D ₁ , D ₂ , D ₃ , D ₄ and D ₅ are diodes, R ₁ ,
R ₂ , R ₃ , R ₄ , R ₅ and R ₆ are resistors.

Next, the operation of the circuit shown in FIG. 9 will be explained. first,
When the battery 11 is connected to the display circuit 16, the contact nv ₃ takes the position shown by the solid line, so the battery 11 → D ₄ → nv ₃ → SW → R ₁ → C ₁ → TR ₄ →
The transistors TR ₄ and TR ₃ are turned on during the charging period of the capacitor C ₁ by the circuit of TR ₃ → battery 11, and the circuit of battery 11 → D ₄ → nv ₃ → SW → 20b → TR ₃ → battery 11 turns on the transistors TR 4 and TR 3 of the display. Direct current is applied to the second winding 20b for a short time during the charging period of the capacitor _C1 .
As a result, if the magnetic pole surface 23a of the first yoke 23 is excited so that an N pole is generated and the magnetic pole surface 24a of the second yoke 24 is excited such that an S pole is generated, the magnetic force generated by this causes the end 29a of the first yoke 23 to be excited. The member 29 magnetized by the permanent magnet 30 is repulsively displaced from one magnetic pole surface 23a and is attracted to the other magnetic pole surface 24a so that a north pole is generated at the magnetic pole surface 24a, thereby reducing the magnetic gap between the magnetic pole surfaces 23a and 24a. 33 and is held in contact with the magnetic pole face 24a. At this time, the lever 27, which has a small inertial mass, is rotated about the shaft 28, and the display plate 27 attached to one end of the lever 27 is rotated about the shaft 28.
The second display surface 24b of appears within the display window 32. (Figure 6). After the direct current applied to the second winding 20b is cut off, the member 29 is attracted to the magnetic pole face 24a by the magnetic force of the permanent magnet 30, and continues to be held in contact with the pole face 24a.

Additionally, if the battery voltage drops below the specified value due to long-term use, the voltage of the battery 11 applied to the voltage monitoring circuit 18 becomes lower than the specified value, and the conduction of the Zener diode ZD is cut off and the transistor TR ₅ is off, battery 11 → D ₄ → nv ₃ → SW → R ₆ → 15 → battery 1
The display control circuit (not shown) in the fraud processing control section 15 is activated by the circuit No. 1 and sends out a control pulse, which turns on the transistors TR ₁ and TR ₂ for a short period of time, so that the battery Due to the residual voltage of 11, a short time current is applied to the first winding 20a of the display through the circuit of battery 11→ _D4 → _nv3 →SW→20a→ _TR2 →battery 11. In this case, when the magnetic pole surface 23a of the first yoke 23 is excited so that an S pole is generated and the magnetic pole surface 24a of the second yoke 24 is excited such that an N pole is generated,
Due to this magnetic force, the member 29, which is magnetized so as to have an N pole at its end 29a, which was attracted and held by the magnetic pole face 24a, is repelled from the magnetic pole face 24a and is attracted to the other magnetic pole face 23a. ,
It is largely displaced within the magnetic gap 33 between the magnetic pole faces 24a and 23a and is held in contact with the magnetic pole face 23a.
At this time, the lever 27 with a small inertial mass is connected to the shaft 28.
The first display surface 26a of the display board 26 attached to one end of the display window 3 is rotated around the display window 3.
Make it appear within 2. After the direct current applied to the first winding 21a is cut off, the member 29 is connected to the permanent magnet 3.
It is attracted to the magnetic pole face 23a by the magnetic force caused by 0,
It is held in contact with this.

In addition, when the battery voltage is returned to the specified value or higher due to replacement of the battery 11, etc., the second winding 20b is briefly Direct current is applied, thereby causing the second display surface 26b of the display board 16 to appear within the display window 32.

Figures 10a and 10b show the magnetic pole surface 23a and the magnetic pole surface 24a.
This is an embodiment in which both sides of the magnetized member 29 located in the magnetic gap 33 formed between the two are arranged substantially parallel to each other, and both sides of the magnetized member 29 are tapered. Of course, it can also operate in the same way. FIG. 11 shows the state in which the magnetized member 29 in FIG. 10 is attached.

As explained above, according to the present invention, the display board 26 having two display surfaces is fixed to one end of the lever 27 which is supported so as to be freely rotatable back and forth, and the magnetized member 29 is fixed to the other end of the lever 27. is attached, and the end 29a of the magnetized member 19 is positioned within the large magnetic gap 33 formed between the magnetic pole surface 23a of the first yoke 23 and the magnetic pole surface 24a of the second yoke 24. , the member 2 is magnetized by either the first yoke 23 or the second yoke 24 when the electromagnet 17 is excited.
Since one pole of 9 is attracted, it is easy to increase the movement distance of the display board 26 to make the display easy to identify.Also, by passing a small current through the electromagnet 17 for a short time, the display can be easily configured. Board 26
These two states can be made to appear selectively and automatically in the display window 32, and the display board 26 can be firmly held in a specified position even when vibrations, shocks, etc. are applied. . In this way, it is possible to realize an usability display that is easy to identify, consumes little power, and has good shock resistance, and can greatly contribute to the service and maintenance aspects of public telephones.

[Brief explanation of the drawing]

FIGS. 1a and 1b are side views showing an example of a conventional disablement indicator, and FIGS.
The figure is a front view, Figure 3 is a view taken along the - line in Figure 2, and Figure 4 is a sectional view taken along the - line in Figure 2.
Figures 5 and 6 show the state of the display when the first display screen is displayed, and Figure 5 is a front view;
FIG. 6 is a side view, and FIGS. 7 and 8 show the state of the display when the second display screen is displayed.
FIG. 7 is a front view, FIG. 8 is a side view, FIG. 9 is a diagram showing an example of a display circuit for driving and controlling the display device of the present invention, and FIGS. 10a and 10b are diagrams showing the shape of the magnetic gap. 10A is a front view, FIG. 10B is a side view, and FIG. 11 is an explanatory view showing the attachment of a magnetized member. In the figure, 10 is a commercial power supply, 11 is a battery, 12 is an NV relay for monitoring commercial power supply, 13 is a changeover switch,
14 is a battery compartment switch, 15 is a freight processing control unit,
16 is a display circuit, 17 is an electromagnet, 18 is a voltage monitoring circuit, 19a, 19b are output terminals, 20a is a first
winding, 20b is the second winding, 21 is the iron core, 22a,
22b is a terminal, 23 is a first yoke, 24 is a second yoke, 25 is a board, 26 is a display board, 27 is a lever, 28 is a shaft, 29 is a magnetized member, 30 is a permanent magnet, 31 is the phone case, 32 is the display window, 33
is the magnetic air gap.

Claims (1)

[Claims] 1. An electromagnet 17 having a first winding and a second winding;
A first yoke 23 and a second yoke 24, each of which has one end fixed to both ends of the iron core 21 of the electromagnet 17, and whose other ends are arranged to face each other so as to have a magnetic gap 33; A lever 27 is provided with a display board 26 that displays two states, and is supported so as to be rotatable in a reciprocating manner to switch and display the two states;
The lever 27 is provided with one pole located within the magnetic gap 22, and is activated to either the first yoke 23 or the second yoke 24 by excitation of the first winding or the second winding of the electromagnet 17.
One pole is attracted to the lever 27.
and a magnetized member 29 for rotating and displaying and holding one of the two states. 2. A self-holding display for a public telephone set or the like as set forth in claim 1, wherein the lever 27 is supported by a shaft 28 in the vicinity of its center of gravity so as to be rotatable back and forth. 3 Member 2 magnetized according to rotation of lever 27
The magnetic pole surfaces 23a and 24a are fan-shaped so that one pole of the first yoke 23 can be attracted and held by either the magnetic pole surface 23a of the first yoke 23 or the magnetic pole surface 24a of the second yoke 24. A self-holding display for a public telephone set or the like according to claim 1, characterized in that the display is configured to form a shaped magnetic gap 33. 4 Member 2 magnetized according to rotation of lever 27
Both sides of the magnetized member 29 are tapered so that one pole of the magnetized member 29 can come into contact with either the magnetic pole surface 23a of the first yoke 23 or the magnetic pole surface 24a of the second yoke 24 and be attracted. A self-holding display device for a public telephone set or the like according to claim 1, characterized in that: 5. The magnetized member 29 is configured such that a permanent magnet 30 is fixed to one end of the plate-shaped magnetic member and one pole is generated at the other end of the plate-shaped magnetic member. Self-holding display devices for public telephones, etc. as described in Section 1.