JP2562165Y2 - Cordless telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cordless telephone, and more particularly, to a cordless telephone with an improved quick response function.

[Prior Art] A conventional cordless telephone comprises a cradle unit 1 generally used as a table and a handle unit 2 used even in a location remote from the cradle unit 1. Transmitting the received call signal to the handle portion 2 via an empty channel in the wireless line of the built-in radios 4 and 5,
Simultaneous call is made at the handle. However, although a multi-channel access (MCA) method is used to search for an empty channel between the radios 4 and 5, it usually takes about 1 second to find and connect to the other empty channel. In particular, when the cradle portion is used as a wired telephone and the handle portion is used as a slave unit, when the handle portion 2 is placed on the cradle portion or used near the cradle, a ringing circuit 6 for receiving an incoming call.
Also, the bell or buzzer of 7 rang early, so that even if the handle was picked up, it was not possible to make a call immediately, which was also a cause of user dissatisfaction. Hereinafter, this will be described in detail. First, an empty channel search in multi-channel access will be described with reference to FIG. When the cradle unit receives an incoming signal from the outside, the cradle unit sequentially selects an available channel (channel for communication and data communication) one by one from a plurality of communication channels S1-ch, S2-ch... A search is performed to determine whether there is a channel that is not used by another transmission / reception device during communication). If there is a vacant channel (the channel Si-ch is set to a vacant channel), it is used only for control of channel allocation and the like. Using the control channel C1-ch, a line opening request and the fact that the channel Si-ch is an empty channel are transmitted to the handle unit 2.

The handle unit 2 checks whether the idle channel Si-ch is an empty channel based on the control signal C1-ch from the cradle unit. In the case of the cradle part, even if the channel is empty, the handle part 2 may not be an empty channel, or vice versa), and it is determined that the channel Si-ch is an empty channel. Reply to the cradle using -ch.

If the channel Si-ch is not an empty channel, a search is made for an empty channel in the same manner as in the cradle section, the result is transmitted to the cradle section using C2-ch, and the same operation is performed again in the cradle section. Done.

When a common empty channel is found, communication between the cradle unit and the handle unit 2 is started with the channel as a communication channel (the transmission / reception frequency is set to the channel).

If there is no common free channel Si-ch in the above, each of the above-described steps to is repeated.

In this manner, the search for an empty channel includes an operation of sequentially searching for an empty channel one channel at a time,
Since communication using the control channel C1-ch needs to be performed until a vacant channel is found, it takes a lot of time to detect a vacant channel and establish a connection, thereby further lengthening the time until the connection.

Next, an operation from receiving an incoming call signal from the outside to a telephone call will be described with reference to FIG.

When an incoming call signal is received from outside (T1), the cradle starts free channel processing (T2). At the same time, when the handle is placed on the cradle, the buzzer of the cradle sounds and the ringer sounds. Is generated, and when it is not placed on the handle, an incoming signal indicating that there is an incoming call from outside is transmitted to the handle 2, and a ringing tone is generated at the handle (approximately T2).

However, at this time (T2), the connection of the communication channel has not been made, and the communication is not possible. Then, the handle unit 2 receives the signal of the control channel C1-ch and starts an empty channel search process for the first time (T3), and thereafter searches for an empty channel until a common empty channel between the cradle unit and the handle unit 2 is found and connected. Is performed.

Then, when a common vacant channel between the cradle unit and the handle unit 2 is found and connected (T4), a call can be made.

Therefore, after the ringing tone is generated, it takes some time before the call can be made, and even if the caller picks up the handle portion 2 and uses the call, a call cannot be made.

For this reason, even if the call is received and the handle portion 2 is picked up, the call cannot be made, and there is a problem that the caller is dissatisfied. For this reason, studies have been made to reduce the time for searching for an empty channel (search) so that a call can be made immediately when a call buzzer or the like rings, that is, to make a quick response. One of the methods is to improve the search speed of the empty channel, to always execute the empty channel search and always secure the empty channel, or to make it possible to immediately secure the empty channel when necessary. Is considered.

However, the former requires a large processing circuit, which increases the cost and is not suitable for the demand for miniaturization.In the latter, especially when the handle is used in a place away from the cradle, Since the power consumption is large and the battery is rapidly consumed, there is a problem that the battery is consumed during the call and the call cannot be made.

[Problems to be solved by the invention]

The cordless telephone according to the present invention is to provide a cordless telephone that can respond to a quick response while minimizing battery consumption while improving the above-mentioned conventional disadvantages.

[Means for solving the problem]

The present invention has the following technical configuration to achieve the above object. That is, the basic technical configuration of the present invention is a cordless telephone including a cradle unit 1 and a handle unit 2.
Channel search circuit for searching for an empty channel in the handle unit 2, a circuit for securing the empty channel searched by the empty channel search circuit, and a call when the empty channel can be secured by the circuit for securing the empty channel. A cordless telephone including a calling circuit that generates a calling signal such as a buzzer, and more specifically, a cordless telephone including a cradle portion and a handle portion, wherein the handle portion is mounted on the cradle portion. In the case of a cradle, a circuit that constantly activates the vacant channel search circuit using the power supply of the cradle section to immediately secure a vacant channel on the radio circuit between the cradle section and the handle section, and a call signal by an incoming signal from the outside And a calling circuit for generating a signal when the handle is away from the cradle. A circuit that generates a call signal in response to an incoming signal from the outside in the cradle unit, an intermittent reception circuit that intermittently detects the presence or absence of a call signal from the cradle unit using a power supply in the handle unit in the handle unit, And a call circuit for generating a call signal when a channel is established.

〔Example〕

In other words, the cordless telephone according to the present invention uses the power supply 8 in the cradle unit 1 while the handle unit 2 is placed on the cradle unit 1 and there is no incoming signal from the outside. A search is made for an empty channel from among the channels S1-ch. If there is an empty channel, the empty channel S1-ch is designated and placed in a call signal, and the empty channel S1-ch exists in the handle unit 2. To let you know.

Similarly, the handle unit 2 constantly searches for an empty channel from the plurality of channels S1-ch.

Since the handle unit 2 recognizes the same empty channel when the cradle unit 1 is mounted, the cradle unit 1 designates, for example, the empty channel S2-ch, and the handle unit 2 similarly operates the channel S2. Recognize that -ch is an empty channel.

As described above, since the cradle unit 1 and the handle unit 2 know each other's use status of the channel, when the empty channel S1-ch is designated by the call signal from the cradle unit 1, the handle unit 2 receiving the call signal Is configured such that a common empty channel S1-ch can be reserved in advance or can be immediately reserved. Therefore, when there is an incoming call to the cradle unit 1 by wire 14 or wirelessly, the call is sent through an appropriate calling circuit 6. By generating a call signal such as sounding a buzzer or a bell, a quick response state in which a telephone call can be immediately made when the user picks up the handle portion 2 and turns on the telephone call circuit is realized.

That is, the operation when the handle portion is placed on the cradle portion will be described with reference to FIG. 5. When there is no incoming signal from the outside, the power supply of the cradle portion is used,
As described above, a common free channel search is performed between the cradle unit and the handle unit by the conventional MCA method (T11, T12), and when there is a common free channel, a system is established for immediate connection.

Therefore, as shown in FIG. 5, when there is an incoming call from the outside (T13), the line using the empty channel is connected in a short time without performing the empty channel search operation, and the communication is enabled (T13). Therefore, even if the buzzer of the cradle section sounds at the same time as the incoming call (T3), when the handle section 2 is picked up, a call can be made immediately. The empty channel search is executed according to a predetermined program. Furthermore, if an empty channel is found during the search, it can be kept. On the other hand, when the handle portion is used in a place far from the cradle portion, the cradle portion 1 constantly searches for an empty channel from among the plurality of channels S1-ch while there is no incoming signal from outside, and the empty channel is If there is, when the incoming signal is received, the empty channel S1-ch is designated and placed on the call signal to notify the handle unit 2 that the empty channel S1-ch exists.

In order to prevent the power supply 9 in the handle unit 2 from being consumed, the handle unit 2 does not always perform the above-described search operation for the empty channel, detects whether a call signal is being sent from the cradle unit 1 intermittently, and outputs the call signal. Only when it is detected, the above empty channel search is executed. When an empty channel can be secured, a call signal is received from the cradle unit, the call circuit 7 of the handle unit is activated, a buzzer or a bell is sounded, and at the same time, an incoming signal is received. Is received by the wireless device 5, so that the consumption of the battery 9 in the handle portion can be largely prevented, and when the bell or buzzer in the handle portion sounds, the wireless line is already connected. So
When the user turns on the call circuit, the call can be made immediately, and a quick response effect can be created. That is,
The operation when the handle is not mounted on the cradle will be described with reference to FIG. 6. When the handle is not mounted on the cradle, a handle is provided to prevent power consumption in the handle. The receiving function of the radio unit in the unit is intermittently activated to detect whether or not a calling signal is transmitted from the cradle unit. When there is a calling signal from the outside (T21), an idle signal is output as shown in FIG. The channel search (T22, T23) is performed (no ringing sound is generated at this time), and the buzzer of the handle portion 2 is sounded at the time of connection (T24) (T25).

Therefore, when the handle portion 2 is picked up after the buzzer sounds, the telephone is already in a communicable state.

In other words, the time from receiving an incoming call to the point at which a call can be made is the same as before, but the time from when a ringing tone is heard until the time at which a call can be made is shortened, so that apparently the time until a call can be made is shortened. Looks like

The empty channel search in the present invention is executed by the calculation means 12 such as a microcomputer and a CPU provided inside the handle unit 2, for example. The calculation means 12 may be provided in the cradle section. The calculating means 12 is always powered and turned on when the handle is placed on the cradle.
When the handle portion is separated from the cradle portion, the detection circuit B of the handle portion 2 operates intermittently and is turned on only when a call signal is detected via the wireless device 5. What is to be done is as described above.

The power source of the cradle unit 1 and the power source of the handle unit 2 are such that when the handle unit is placed on the cradle unit, the charging terminal 11 of the cradle unit and the charging terminal 11 'of the handle unit 2 are connected to each other. To handle part 2 charger 10
Is charged.

The handle portion 2 in the present invention is configured to end the call even when the handle portion 2 is away from the cradle, thereby forming a state of waiting for the next call. Next, a flow chart for implementing the present invention is shown in FIG.

After the start, it is first determined whether or not the handle portion is mounted on the cradle portion (ON HOOK). If YES, the empty channel search is always ON and the empty channel search is executed to secure the empty channel (step i). ). Next, it is detected whether or not there is an incoming signal (step j). If NO, the process returns to step a. If YES, the incoming call data is sent to an empty channel (step k), and a calling circuit is activated to activate a buzzer or the like. When the user rings (step l), the user turns on the call circuit in the handle portion to perform a call process (step m). Then, it is determined whether or not the call is to be ended (step n). If NO in step n, step n is repeated
If YES, end the call (step o), step a
On the other hand, when the handle unit 2 is separated from the cradle unit 1, that is, when NO in step a, the call detection circuit of the handle unit 2 starts intermittent reception (step b), and the cradle unit 1
Is detected at an appropriate sampling period to determine whether or not a calling signal is output from the CPU. When it is detected in step c that a calling signal is present, an empty channel search is executed (step d). If NO in step c, the process returns to step a.

When an empty channel can be secured by the empty channel search, an incoming call signal from the cradle unit is sent to the empty channel (step e), and then a calling circuit is activated to sound a buzzer or the like (step f).

Next, the user turns on the call circuit in the handle portion to perform a call process (step g), and finally, it is determined whether or not the call has ended (step h).

〔effect〕

In the present invention, since quick response is performed as described above, user dissatisfaction can be improved, and battery consumption can be significantly reduced, so that long-term use is possible.

[Brief description of the drawings]

FIG. 1 is a schematic illustration of a cordless telephone according to the present invention. FIG. 2 shows a flowchart when the cordless telephone according to the present invention is used. FIG. 3 is a chart showing an example of an operation procedure in executing a free channel search in a conventional cordless telephone or the like. FIG. 4 is a chart for explaining the operation procedure of the above-mentioned conventional cordless telephone or the like. FIG. 5 is a time chart showing an example of an empty channel search procedure at the time of on-hook in the present invention. FIG. 6 is a time chart showing an example of a procedure of an empty channel search at the time of off-hook in the present invention. 1 ... Cradle part, 2 ... Handle part, 3 ... Power line, 4, 5 ... Radio, 6, 7 ... Calling circuit, 8, 9 ... Power, 10 ... Charger, 11, 11 '... Charging terminal, 12 ... Microcomputer, cpu, 13 ... Call detection circuit, 14 ...
Wired, 15 ... interface.

Claims (2)

(57) [Scope of request for utility model registration] 1. A cordless telephone comprising a cradle section and a handle section, wherein an empty channel search circuit for searching for an empty channel in the cradle section and the handle section, and an empty channel searched by the empty channel search circuit. A cordless telephone, comprising: a circuit for securing a call; and a calling circuit for generating a call signal when the circuit for securing a free channel has secured a free channel. 2. A cordless telephone comprising a cradle portion and a handle portion, wherein when the handle portion is mounted on the cradle portion, a vacant channel search circuit is always operated by using a power supply of the cradle portion. A means for promptly securing an empty channel on the radio circuit between the cradle and the handle, a calling circuit for generating a call signal in response to an external incoming signal, and a handle separated from the cradle. A circuit that generates a call signal in response to an incoming signal from the outside in the cradle unit, and an intermittent receiving circuit that intermittently detects the presence or absence of a call signal from the cradle unit using a power supply in the handle unit at the handle unit And a call circuit for generating a call signal when a free channel is secured. Cordless phone that features a Rukoto.