JPS6048958B2 - Electric key system in button telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric resistance sewing method for extracting press information of non-lock electric resistance sewing of a button telephone.

The electric resistance stitching of conventional button telephones was a locking mechanical interlocking electric resistance stitch, which caused the electric resistance stitching to be large and difficult to operate, resulting in frequent failures.

Furthermore, although there are examples in which non-lock electric resistance stitching is used, there are drawbacks such as a limitation in the order of operations. In order to solve these drawbacks of the conventional locking electric resistance sewing, the present invention uses non-locking electric resistance sewing to make it compact, easy to operate, and less likely to break down, and also uses a memory means and a time measurement circuit. In this button telephone device, the line is connected based on the memorized resistance stitch information when the handset is lifted within a certain period of time after pressing the resistance stitch button. This provides an electric resistance stitching method.

The present invention will be explained in detail below with reference to the drawings.

1 and 2 are block diagrams showing embodiments of the present invention, and FIG. 2 is a partial modification of FIG. 1. In both figures, 1 is a non-locking electric sewing and hook switch unit, 2 is an electric sewing information input circuit that temporarily stores the output information of unit 1, and 3 is a hook information output circuit that extracts the hook information in the electric key information input circuit 2. 4 is a telephone key information output line for taking out the telephone key information in the telephone key information input circuit 2; 5 is a memory circuit for storing the information of the pressed telephone key transmitted through the telephone key information output line 4; 6 is a telephone key in the unit 1 A time measurement circuit that measures a certain period of time after the button is pressed by counting clock pulses, and 7 is a hook information output line 3 that is used when the hook switch in the unit 1 is turned off or hooked.
A telephone key information output circuit continues to output the contents of the memory circuit 5 in response to the output of the telephone key information output circuit 8, and 8 is an output line to other control circuits constituting the button telephone device. A single wire is used between each block, but bundled wires having the required number of core wires are used for interconnection.
In FIG. 1, the time measurement circuit 6 receives input from the same key information output line 4 as the memory circuit 5, but in FIG. 2, the input to the time measurement circuit 6 is obtained from the output of the memory circuit 5. .

Next, the present invention will be explained in detail based on FIGS. 1 and 2.

In Figures 1 and 2, there is a telephone key. Information on the hook switch and telephone key in the hook switch unit 1 is temporarily stored in the telephone key information input circuit 2 in the form of a code indicating the number of the telephone key or the hit position as it is, and when off-hook, the off-hook information is changed to the hook information. It is output to an output line 3, and when a telephone key in the unit 1 is pressed, the telephone key information is output to a telephone key information output line 4 corresponding to the telephone key. When an output appears on the key information output line 4, this information is stored in the storage circuit 5 in the form of the above-mentioned number or the bit position as it is. In the off-hook state, the key information output circuit 7 continues to output the contents of the memory circuit 5 to other control circuits forming the button telephone device through its output line 8. In addition, in FIG. 1, when the hook information output line 3 is on-hook with no output, the time counting circuit 6- will output when the key information output line 4 outputs,
Time measurement is started, and the contents of the memory circuit 5 are reset after a certain period of time has elapsed.

When there is an output on the hook information output line 3, the contents of the memory circuit 5 are not reset. On the other hand, in FIG. 2, when the hook information output line 3 is on-hook with no output, time counting starts when an output appears in the memory circuit 5, and when a certain period of time has passed, the contents of the memory circuit 5 are reset. . When there is an output on the hook information output line 3, the contents of the memory circuit 5 are not reset. Therefore, according to the embodiments of FIGS. 1 and 2, if the telephone key in unit 1 is pressed down and then goes off-hook within a certain period of time, or if the telephone key is pressed after going off-hook, , until the next on-hook or when a different key is pressed, the information on the pressed key is transmitted from the key information output circuit 7 to the other control circuits that make up the button telephone device through its output line 8. It continues to be output.

Note that the other control circuits beyond the output line 8 are not directly related to the present invention, and detailed explanations thereof will be omitted.

FIG. 3 shows a specific embodiment of the present invention based on the format of FIG. 1. In the figure, KT is a button telephone, ■ is a main device,
is a hook switch, KSI, KS2, KSn are non-locking electric keys, 11, 12, 13, 14 are inverters, 1
5 is a parallel-to-serial conversion circuit, 16 is a line driver, 17 is a data transmission line, 20 is a line receiver, 21 is a serial-to-parallel conversion circuit, 40 is an output line for the end pulse of serial-to-parallel conversion output from 21, 22 is an input 23 is the hook switch information output line of 22, 24 is the n key information output line of 22, 25 is the encoder, 26 is the 0R circuit composed of 0R gates, 27 is the output line of 26, and 28 is the signal A set pulse generator consisting of a monostable multivibrator triggered on the rising edge, 29 is the output line of 28,
30 is the telephone key number register, 31 is 0R gate, 32 is A
ND gate, 33 is a reset pulse generator consisting of a monostable multivibrator that is triggered by the falling edge of a signal, and 34 is a monostable multivibrator that has a reset input terminal and is retriggered by the rising edge of the signal. 35 is an inverter, 36 is an on-hook pulse generator consisting of a monostable multivibrator triggered by the falling edge of a signal, 37 is an output line of 36, and 38 is an AND gate. The constructed telephone key information output circuit 39 is connected to other control circuits of the button telephone device through an output line 38.

Next, the operation of the embodiment shown in FIG. 3 will be explained.

Hook switch HS and non-hook key KSI, KS
2, each information of KSn corresponds to the inverters 11, 12,
13 and 14, is parallel-serial-converted by a parallel-to-serial conversion circuit 15 at regular intervals, and is sent to a data transmission line 17 through a line driver 16 in the form of time-division pulses. This time-division pulse passes through the line receiver 20, undergoes serial-to-parallel conversion in the serial-to-parallel conversion circuit 21, and is outputted to the serial-to-parallel conversion circuit 21 every time the serial-to-parallel conversion is completed.
The conversion output of 1 is set in the input register 22 at regular intervals. As a result, the state of the hook switch of the input register 22 (the state of the hook switch is displayed on the information output line 23)
Furthermore, the states of n electric keys appear on the electric key information output line 24 with a certain time delay. The information on the telephone key appearing on the telephone key information output line 24 is collected by the 10R circuit 26,
As a result, when any one key is pressed, this output line 2
7 changes from low level 1 to high level, and at the rise of this output, a pulse is output from the 1 set pulse generator 28 to its output line 29, operating the time measuring circuit 34, and -
Next, the electronic key information entered in the input register 22 is encoded through the encoder 25 and set in the electronic key number register 30.

The output of the time measurement circuit 34 is at a high level while measuring a certain period of time, and becomes a low level when the measurement is completed. Therefore, it is a time measurement circuit. 34 finishes its measurement, its output changes from a high level to a low level, and at the fall of this output, the reset pulse generator 33 outputs a reset pulse to the N1 gate. When the hook switch HS goes off-hook, its information appears on the hook information output line 23, and while it is off-hook, this hook information output line 23 is kept at a high level, and in this state, the AND gate 32 is prohibited, and even if a pulse is generated by the reset pulse generator 33, the telephone key number register 30 is reset. In this state, the telephone key information output circuit 38 is opened and its output line 39 is passed through, and the telephone key number register 30 is reset. The contents of 30 are output to other control circuits of the key telephone device.

Hook switch HS is on. When hooked, the hook information output line 23 changes from high level to low level, and turns on at the fall of this output. A pulse is generated from the hook pulse generator 36 and passes through the 0R gate 31 to the electronic key number register 3.
0 is reset, and the time measurement circuit 34 is also reset.

In the above operating state, the power is turned off within a certain period of time after the telephone key is pressed, that is, while the time measurement circuit 34 is operating.
When a telephone key is pressed after being hooked or off-hook, the telephone information output circuit 38 is passed until the next on-hook or a different telephone key is pressed. Information on the pressed key will continue to be output to other control circuits. The operation of the embodiment shown in FIG. 3 has been described above.

Although FIG. 3 shows an embodiment implemented using wire logic, for example, the parallel/serial conversion circuit 15 in the button telephone KT can also be implemented using a microprocessor. Also, main device ME 2
A part or all of 1 to 39 can be realized by a microprocessor. FIG. 4 shows a specific embodiment of the present invention based on the format of FIG. 2. In the figure, KT is a button telephone, ■ is a main device, HS is a hook switch, and KSI, . . . , KSn are non-locking telephone keys. , 51, 52, . . . , 54 are inverters, 55 is a parallel-serial conversion circuit, 56 is a line driver, 5
7 is a data transmission line, 60 is a line receiver, 61 is a serial-to-parallel conversion circuit, 90 is an output line for the end pulse of serial-to-parallel conversion output from 61, 62 is a hook switch information line for 61, and 70 and 80 are each an HSI , KSn, 61 and 81 are AND gates, 63 is a D flip-flop, 72 and 82 are D flip-flops with reset input terminals, and 64, 73, and 83 are 63, 72, and 82, respectively. Output lines 78 and 88 are each 72
, 82 reset input lines, 74, 84 are 0R gates, 7
5, 85 is N1 gate, 65 is inverter, 76, 86
is a time measurement circuit composed of a monostable multivibrator that has a reset input terminal and is retriggered by the rising edge of the signal, and 77 and 87 are composed of monostable multivibrators that are triggered by the falling edge of the signal. Reset pulse generator, 66 is an on-hook pulse generator consisting of a monostable multivibrator triggered by the falling edge of the signal, 67 is the output line of 66, and 68 is the electronic key information consisting of an AND gate. Output circuit 69 is the output line of 68.

Next, the operation of the embodiment shown in FIG. 4 will be explained.

Hook switch HS and non-locking electric key HSI, HS
Each piece of information passes through the corresponding inverters 51, 52, and 54, is parallel-serial-converted at regular intervals by the parallel-to-serial conversion circuit 55, and is sent out to the data transmission line 57 through the line driver 56 in the form of time-division pulses. Ru. This time-division pulse passes through a line receiver 60 and undergoes serial-to-parallel conversion by a serial-to-parallel conversion circuit 61. The serial-parallel conversion circuit 61 outputs a termination pulse to the termination pulse output line 90 every time the conversion is completed, and this termination pulse sets the output of the hook information line 62 of the serial-parallel conversion circuit 61 to the D flip-flop 63. . On the other hand, the outputs of the key information lines 70, 80 are input to the input terminals of the D flip-flops 72, 82, and the outputs of the key information lines 70, 80 and the end pulse output are input to the clock terminals of the D flip-flops 72, 82. Since the output of the line 90 is gated and inputted by the AND gates I7l, 8l, the D flip-flops 72, 82 output the corresponding key information at the time when the serial/parallel conversion circuit 61 outputs the conversion end pulse to the end pulse line 90. It is set only when the output is on the lines 70 and 80, and the reset input lines 78 and 88
This content will not be reset and will continue to be held until a reset pulse is output. Therefore, the non-locking electric current KSI,K
When Sn is pressed, the corresponding D flip-flop 7
Since each output line 73, 83 of No. 2, 82 changes from low level to high level, the corresponding time measuring circuit 76, 86 starts the time measuring operation at the rise of this output, and its output becomes high level. When the measurement ends, the level becomes low. Also, is there a corresponding time measurement circuit? 6,86 completes the measurement, its output changes from high level to low level. level, and at the fall of this output, the corresponding reset pulse generators 77, 8
7 is an AND gate 75, 85 corresponding to the reset pulse.
Output to. Also, when the hook switch HS is turned off/hook, that information appears on the hook information output line 64, and the ``O!'' information appears on the hook information output line 64. While hooking, this hook information output line 64 is at a high level, and in this state, the corresponding N■
The gates 75 and 85 are prohibited, and even if a pulse is generated by the corresponding reset pulse generator 77 or 87, a pulse 3 is not output to the corresponding reset input line 78 or 88, and the corresponding flip-flop 72 or 82 is not reset. In addition, in this state, that is, in the off-hook state, the telephone key information output circuit 68 is opened, and the telephone key information output from the corresponding D flip-flops 72 and 82 is transmitted through the output line 69 to control other controls of the button telephone device. Output to the circuit. When the hook switch HS is turned on and hooked, the hook information output line 64 changes from high level to low level, and at the fall of this output, a pulse is generated from the on-hook pulse generator 66, which passes through the 0R gates 74 and 84. D flip-flop 72, 82
is reset, and time measurement circuits 76 and 86 are also reset.

In the state of the above operation, if you press the non-lock key KSI, for example, the device goes off-hook within a certain period of time while the time measurement circuit 76 is operating, or if you press the non-lock key KSI after going off-hook. Then this telephone key KS
The output of the D flip-flop 72 corresponding to I passes through the telephone key information output circuit 68 and continues to be output to other control circuits of the key telephone device until the next on-hook.

As explained above, according to the present invention, even when using a non-locking electric key, it is possible to have the features of a conventional locking electric key. This has the advantage of being able to configure a key unit for a button telephone that is not related to the above.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing another embodiment of the invention, and Fig. 3 shows a detailed example of the invention based on the format of Fig. 1. Block Diagram FIG. 4 is a block diagram illustrating a detailed example of the present invention based on the format of FIG. 2.

Claims (1)

[Claims] 1 storage means for storing telephone key information indicating a pressed non-lock telephone key corresponding to a button telephone; a measuring means for measuring a certain period of time after the non-lock telephone key is pressed down when the non-lock telephone key is pressed during on-hook; When the button telephone goes off-hook within a certain period of time, the telephone key information stored in the storage means is output as valid information, and when the non-lock telephone key is pressed down while off-hook, the telephone key information is made valid. A telephone key system in a button telephone device comprising an information sending means for outputting information.