JPS6342755Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a line switching device for a telephone to which a plurality of telephone lines are connected.

[Description of prior art]

Traditionally, in cases where multiple telephone lines are connected to multiple telephones, such as in an office, and a call is made to a telephone where the called party is not present, a neighbor can pick up the handset of that telephone. There were times when it was difficult to take the distance.

In particular, in cases where the handset is mounted at a specific position on the desk, such as a desk with a telephone set, it is difficult to talk on the phone unless one is seated in a chair at the desk.

[Purpose of invention]

The present invention improves on this point. Even if a call is made to a telephone where the called party is not present, a neighbor can easily and quickly pick up the telephone line and talk to the caller. The purpose of the present invention is to provide a line switching device for a telephone set.

[Summary of the idea]

In the present invention, a changeover switch is provided between the subscriber's telephone and the subscriber's telephone line, which automatically returns to the subscriber's telephone line when the handset of the subscriber's telephone is turned off. A subscriber telephone line different from the subscriber telephone line is led to the contact that is connected when operated,
The tone ringer circuit of the subscriber telephone is connected to the subscriber telephone line side of the changeover switch.

[Explanation based on examples]

An explanation will be given below based on the drawings of the embodiment.

FIG. 1 is an external perspective view of a telephone desk equipped with a line switching device according to an embodiment of the present invention. A handset storage box 4 for storing a handset 2 and a curl cord 3 is attached to the side of the desk 1. Reference numeral 5 denotes a drawer plate that can be taken in and out in a fan shape, and a push button 6 and a calculator 7 are stored on the drawer plate 5. The push button 6 and the handset storage box 4 are connected by an electric wire (not shown) passing under the top plate 8, and the handset 2,
The curl cord 3, handset storage box 4, and push button 6 constitute a telephone set. 1' is a desk facing the desk 1, and a telephone similar to that of desk 1 is also attached to this desk 1'. Call indicator lamps 9 and 9' are provided at each corner of the top plates 8 and 8', and are designed to blink when the telephones on the desks 1 and 1' are in a called state.
10 is a switch.

FIG. 2 is an enlarged front view of the handset storage box 4. As shown in FIG. At the top of the handset storage box 4 are a telephone switch 11, a speaker 12, and a speaker 12.
volume control knob 13 and changeover switch 14
is installed. This changeover switch 14 is a switch that automatically returns to its original state by an electromagnetic relay when the switch 11 is opened.

FIG. 3 is a circuit diagram of the telephone shown in FIGS. 1 and 2. In FIG. 3, each symbol corresponds to each symbol in FIG. 1 and FIG. 2, respectively.
Connection terminals 16 and 17 of a subscriber's telephone line are connected to the handset storage box 4 of the desk 1. A first subscriber telephone line is connected to the connection terminal 16, and a second subscriber telephone line is connected to the connection terminal 17.

This connection terminal 16 is connected to a break contact of a changeover switch 14 provided in the handset storage box 4, and the connection terminal 17 is also connected to a break contact of a changeover switch 14 disposed in the handset storage box 4.
are connected to the respective make contacts. This changeover switch 14 is connected to a network 18 via switch switches 10 and 11. A pushbutton 6 and a handset 2 are connected to this network 18 .
Further, the tone ringer circuit 19 of this telephone set is led to the first subscriber telephone line side of the changeover switch 14. The tone ringer circuit 19 is connected to the call indicator lamp 9, the speaker 12, and the volume control knob 13.

The circuit configuration of the telephone at desk 1' is different from that of the telephone at desk 1, except that the first subscriber telephone line is connected to connection terminal 17' and the second subscriber telephone line is connected to connection terminal 16'. Since the circuit configuration is the same as that of , repeated explanation will be omitted.

With this configuration, when a calling signal is transmitted to the first subscriber's telephone line, the calling indicator lamp 9 on the desk 1 flashes and the speaker 12 makes a ringing tone. When the called party is present at this desk 1,
When the handset 2 is picked up, the telephone switch 11 is closed and a call can be made.

However, at this time, if the called person is absent at desk 1 and there is a person at desk 1', the person at desk 1' will hear the ringing tone of the telephone at desk 1, and will also hear the ringing tone of the telephone at desk 1, and will also hear the call indicator light on the top plate 8 facing him. 9 is blinking, pick up the handset 2' and manually operate the changeover switch 14' to change from the break contact to the make contact, the switch 11' is closed and the called party at desk 1 You can talk to the caller on your behalf. When the call is finished and the person at the desk 1' stores the handset 2' in the storage box 4', the switch 11' is opened and at the same time the changeover switch 14' returns to its original break contact.

Also, if the person at desk 1' is talking on behalf of the called party at desk 1, another caller sends a paging signal to the person at desk 1' via the second subscriber telephone line. , the call indicator lamp 9' on desk 1' flashes,
Also, a ringing tone sounds from the speaker 12'. As a result, the person at desk 1' can terminate the current call, open and close the switch 11' again, and when the switch 11' is opened, the changeover switch 14' will return to its original break contact. ′ can talk to the other caller.

Note that when the called party is absent at desk 1' and there is a person at desk 1, the telephone conversation operation of the person at desk 1 can be performed in the same manner as described above, and therefore a repeated explanation will be omitted.

In the above example, two telephone desks are connected to two subscriber telephone lines, but the number of telephone desks and the number of subscriber telephone lines is not limited to the above example. Moreover, it can be applied not only to desks with telephones but also to general telephones.

In addition, the changeover switch 14 does not return to the original break contact only when the switch 11 is opened, and even when the telephone on the desk 1 is switched to the second subscriber telephone line, the switch 14 does not return to the original break contact point only when the switch 11 is opened. It is desirable to configure the system so that it can be forcibly restored to the subscriber's telephone line.

In addition, the automatic return of the changeover switch 14 is performed by the drawer plate 5.
This may be done by opening the upper switch 10. Further, this automatic return can also be performed mechanically in conjunction with the operation of a switch in addition to an electromagnetic relay.

[Effect of idea]

As described above, according to the present invention, each telephone is provided with a changeover switch which can select a plurality of subscriber telephone lines and which automatically returns when the switch is opened, and furthermore, the changeover switch is provided on the subscriber telephone line side. (a) Even if a call is made to a telephone where the called party is not present, a person at another desk can easily and quickly contact the called party. (b) At the same time as this call ends, the phone of the person sitting at the other desk will automatically return to the phone line specific to that phone and connect, and (c) During this call, If a call is made from another person to a person sitting at another desk, the call can also be known.

It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a telephone desk equipped with a line switching device according to an embodiment of the present invention. FIG. 2 is an enlarged front view of the handset storage box of the same telephone. FIG. 3 is a circuit diagram of the telephone. 1... desk, 2... handset, 3... curl cord, 4... handset storage box, 5... drawer board, 6...
...Push button, 7...Calculator, 8...Top plate, 9...
Calling indicator lamp, 10, 11...Hook switch, 12...Speaker, 13...Volume adjustment knob, 14...Switch switch, 16, 17...Subscriber telephone line, 18...Circuit network, 19...Tone ringer circuit .

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A changeover switch is provided between the subscriber's telephone and the subscriber's telephone line to automatically return to the subscriber's telephone line when the handset of the subscriber's telephone is turned off. , a subscriber telephone line different from the subscriber telephone line is led to the contact that is connected when the changeover switch is manually operated, and the tone ringer circuit of the subscriber telephone is connected to the subscriber telephone line of the changeover switch. A telephone line switching device connected to the side. (2) The transfer switch is configured so that even if the subscriber telephone has been switched from the subscriber's telephone line of this telephone to another subscriber's telephone line, it can be manually forced back to the subscriber's telephone line of this telephone. A line switching device for a telephone as set forth in claim (1) of the utility model registration claim. (3) Scope of Utility Model Registration Claim No. 1 in which a subscriber's telephone set is arranged on the side of a desk and a subscriber's telephone of another subscriber's telephone line is arranged on the side of a desk adjacent to said desk.
Telephone line switching device described in paragraph (1) or paragraph (2).