JPH07123139A - Telephone set - Google Patents

Abstract

PURPOSE:To easily set the holding state without depressing a holding key or the like by giving a holding function which allows to put a handset on a telephone set main body. CONSTITUTION:An engaging recessed part 18 to be engaged with a hook part 17 is formed in the receiver head of a handset 2 of a wall key telephone set 1. A printed board 10 arranged in a main body 3 is provided with a hook switch 11, and an operating piece 11a of the switch 11 slightly projects from an upper face plate 3U of the main body 3. The diameter of this operating piece 11a is made approximately equal to that of the hook part 17. At the time of the holding operation, a collee lifts the handset 2 from a handset cradle 7 to hook it on the upper face place 3U of the main body 3 and retains it so that the operating piece 11a is fitted to the engaging recessed part 18. The operating piece 11a of the switch 11 is pressed in the engaging recessed part 18 of the bottom of the receiver head, and the switch 11 is made closed to set the holding state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone having a holding function, and more particularly to a telephone which simplifies the holding function so that the holding state can be seen at a glance.

[0002]

2. Description of the Related Art Conventionally, a key telephone having a hold function has been widely used. In key telephones and the like, such a hold function is included in the basic functions of the service function.
A conventional example of such a key telephone will be described with reference to FIG.

In FIG. 12, reference numeral 1 denotes a button telephone as a whole, 2 denotes a handset, 3 denotes a main body, and a dial key 4 as well as a hold key 5 on the panel of the main body 3 and a one-touch dial belonging to a special function as a service function. Keys 6 and the like are provided.

This hold key 5 is made so that it can be put on hold by pressing the holding line 5 and the station line during a call.
Of course, the hold key is "off" during a call. By providing such a holding function, home telephones and cordless telephones can perform extension mutual call after the holding operation.

That is, according to such a holding function of the key telephone 1, after pressing the holding key 5, the handset 2 is moved to the handset cradle (cradle) as shown in FIG.
e) It can be held even when placed on 7.

[0006]

In the above-mentioned conventional button telephone, the hold key 5 is pressed to pick up the station line in use and then the handset 2 is placed on the handset cradle 7. In order to return to the call state again, the hold key 5 is pressed again to make a local line call, and the hold key 5 must be pressed several times.

As described above, in the key telephone having the electric hold key 5, the handset 2 can be placed on the handset cradle 7 without disconnecting the line. However, even after the hold key 5 is pressed, an extension or the like can be handled. Many of them often feel that it is psychologically anxious to put the handset 2 back on the handset cradle 7 and place the handset 2 on the desk.

After pressing the hold key 5, the handset 2
Even if it is placed on the handset cradle 7, it is likely to be forgotten because it is not apparent that it is on hold.

Further, in the United States, a wall-mounted telephone is often constructed by a one-touch operation on a modular opening provided on the wall of a kitchen or the like. Therefore, a person who has to temporarily leave the telephone opening during a call. In addition, a person who is psychologically uneasy even when the hold key is pressed does not have a mechanism for temporarily placing the handset 2, and thus the handset 2 must be hung from the main body 3. In this state, not only will the surrounding noise be picked up and transmitted to the other party, but if an attempt is made to resume the call using another telephone with a home telephone line connected in parallel, the two telephones will be closed. There are problems such as sound quality deterioration and noise due to the line voltage being lowered because of the connected state.

The present invention is intended to provide a telephone that solves the above problems, and its main purpose is to put the handset on the telephone body by removing the handset from the handset cradle, and the telephone is automatically put on hold. The purpose is to provide a telephone that can be easily held without pressing the hold key or the like.

Another object of the present invention is to provide a second handset cradle dedicated to holding in addition to the usual first handset cradle provided in the main body of the telephone so that the second handset can be easily held and the handset can be used as a second handset. It is possible to provide a telephone that can also serve as a display of the hold so that it can be seen at a glance that it is on hold when placed on a handset cradle.

Still another object of the present invention is to provide a second handset cradle dedicated to holding on the main body so that the handset after the holding key operation can be placed on the second handset cradle for holding without hesitation. (EN) Provided is a telephone which avoids a feeling of psychological anxiety that an external line may be cut off or a handset being hung from the telephone body.

Still another object of the present invention is to take a handset of another telephone connected in parallel with respect to a main telephone set for which a hold operation has been performed, and take a hold release state even if the main telephone is in a hold state. The purpose is to provide a telephone that does not suffer from sound quality deterioration or noise.

[0014]

The telephone of the present invention is a telephone 1 having a telephone body 3 and a handset 2 as shown in FIG. 1, and the handset 2 is placed on the telephone body 3. By doing so, it was designed to have a hold function.

[0015]

The telephone of the present invention has a holding function for holding a handset 2 in the main body 3 of the telephone 1 based on a handset detecting means provided at a predetermined position of the main body 3 and / or the handset 2 as a holding function during a telephone call on a station line. By disposing the handset 2 at a different position without pressing the hold key 5 by disposing the telephone, a telephone can be obtained in which the anxiety of stopping the line call can be eliminated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wall-mounted button telephone with a holding function included in the basic functions of a service function showing an embodiment of a telephone of the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a perspective view showing the overall construction of the key telephone 1 of the present invention when it is held, and FIG. 2 is a side sectional view showing a cross section of a part of the handset 2 and the main body.

In FIG. 1, parts corresponding to those in FIG. 12 are designated by the same reference numerals. The button telephone 1 of this example is a wall-mounted button telephone, and is attached to the wall surface 8 through the back surface of the main body 3. The panel surface of the main body 3 on which the dial keys 4 are arranged is attached so as to be inclined with respect to the wall surface.
That is, the upper plate 3U of the main body 3 is formed so as to be orthogonal to the wall surface,
The panel surface from the tip of the upper surface plate 3U is formed to incline downward toward the wall surface.

The wall-mounted button telephone 1 of this example is shown in FIG.
The hold key 5 is not provided on the panel surface like the above. Other configurations are the same as those in FIG. 12, and a one-touch dial key 6 and a handset cradle 7 are provided.

In the configuration shown in FIG. 1, the agent is the wall-mounted button telephone 1 when the telephone receiver of the handset 2 is used during a telephone call on the office line.
The holding function is achieved by arranging it at a predetermined position of the main body 3 so as to be hooked on the upper plate 3U.

An example of the detection mechanism for achieving the holding function in this way will be described with reference to the side sectional view of FIG. First, an engaging recess 18 that engages with the hooking portion 17 is formed in the receiver head at the lower end of the casing of the earpiece housing the receiver of the handset 2. When the handset 2 is hooked on the lower portion of the handset cradle 7, the hooking portion 17 is fitted into the engaging recess 18 and is locked so as not to drop.

As can be seen from the side sectional view of the handset cradle portion of FIG. 2, a speaker 9 is provided on the lower surface of the sound emission hole in the main body 3 of the button telephone 1, and a printed circuit board 10 and the like are further provided. This printed circuit board 10
A hook-type switch 11 is provided on the upper surface of the main body 3 so that the operating piece 11a of the switch 11 slightly protrudes from the upper surface plate 3U of the main body 3 and the diameter of the operating piece 11a is substantially the same as the diameter of the hook portion 17. When performing the holding operation, the agent lifts the handset 2 from the handset cradle 7 and hooks it on the upper plate 3U of the main body 3 as shown in FIG. To lock.

In this example, the operating piece 11a of the switch 11 is pressed in the engaging recess 18 on the bottom surface of the handset head by merely hooking the handset head of the handset 2 on the upper plate 3U of the main body 3 in this way, and the switch is turned on. 11 is in the "contact" state, and is in the hold state. That is, there is no need to press the hold key, and the hold state is immediately maintained. When talking, it suffices to take the handset 2 from the top plate 3U. Further, the hold tone or melody at the time of hold may be emitted from the speaker 9 in association with the “contact” state of the switch 11.

According to the construction of the telephone as described above, the handset 2 is put on or hooked at an appropriate position different from the usual handset cradle position on the main body 3 of the telephone 1, and the handset 2 is put in the hold state. It is possible to release the hold state by separating the handset 2 from the main body 3, and there is no need to dispose a push button such as a hold key on the panel surface side by side with the dial keys 4 and the like as in the conventional case. The hold operation is performed, and the fact that the handset 2 is in the hold state is clarified from the arrangement position of the handset 2, and the hold display function is also shown.

FIG. 3 shows another embodiment of this embodiment. In this embodiment, a magnetic sensor 13 such as a Hall element or a reed switch is mounted on a printed board 10 as a top plate 3.
It is arranged so as to face U. On the other hand, when the handset head having the handset 12 of the handset 2 is hooked on the upper plate 3U, the magnet 1 is placed at a position facing the magnetic sensor 13.
4 is provided. In FIG. 3, the engaging recess 18 for hooking is provided.
Although not shown in the figure, instead of the actuating piece 11a shown in FIG. 2, the hooking portion is projected to the upper surface plate 3U of the main body 3.

Even with such a structure, the magnet 14 is used as the magnetic sensor 1.
The magnetic sensor 13 may detect the state brought in the vicinity of the No. 3 and perform the holding function.

FIG. 4 shows a further embodiment showing only a part of the portion A of FIG. 3. In FIG. 3, a magnet is provided in the handset head of the handset 2 in order to "operate" the magnetic sensor with the magnet 14. Although 14 is provided, as shown in FIG. 4, a magnetic plate 14a such as an iron plate is cut into a rectangular shape, the magnet is temporarily contacted with the magnet of the handset 12, and the other end is arranged at the lower end of the handset head. The magnetic sensor 13 such as a reed switch is operated via a magnetic plate 14a that is magnetized by bringing the other end to a position facing the magnetic sensor 13.

In the configurations shown in FIGS. 3 and 4 described above, the switch is not "turned on" by a mechanical operation at the time of hooking, and therefore, a simple configuration is not required to provide a special switch operating mechanism on the upper plate 3U of the main body 3. Can be used as a telephone.

Still another configuration of this example will be described with reference to FIG. The case of FIG. 5 shows a configuration in which the handset 2 is arranged so as to straddle the dial key group 4 of the key telephone 1 during the hold.

That is, the reed switches 13L and 1L are provided as magnetic sensors 13 on the upper ends of the left and right side walls 3L and 3R of the main body 3.
3R is provided and magnets 14L and 14R are provided in the handset heads 16L and 16R of the handset 2.

When the magnets 14L and 14R are arranged so as to straddle the dial key group 4 of the main body 3, the reed switch 1
It is needless to say that the holding position is predetermined so as to face the 3L and 13R, and the handset 2 is placed sideways. Also in this case, the handsets 15 and 12
It is also possible to replace the magnet of the above with the magnets 14L or 14R and also serve as the magnets. It is obvious that the magnets 14, 14L and 14R and the reed switches 13, 13L and 13R may be reversed to those shown in FIGS. 3 and 4, and the reed switch may be turned on the handset 2 side and the magnets may be provided on the main body side.

In the above structure, the reed switches 13L and 13R are provided near the upper portions of the left and right side walls 3L and 3R of the main body 3, and the holding operation is performed by the AND output from the two reed switches 13L and 13L. It is also possible to provide only one 13L or 13R and perform the holding operation with the output of only one reed switch 13L or 13R. Of course, a mechanical switch may be provided as shown in FIG.

In FIG. 5, the handset 2 is connected to the key telephone 1
When placed so as to straddle the main body 3, the handset 2 and the plurality of dial keys 4, 4, ... Are placed so as to be separated from each other. For example, for the plurality of 4, 5, 6 shown in FIG. It is detected that the handset 2 simultaneously presses the dial keys 4, 4, and 4, and the reed switch 1 is made to perform the holding operation by the AND output of the three dial keys.
The attachment of 3L and 13R and the magnets 14L and 14R may be omitted.

According to the configuration shown in FIG. 5, if only the holding position of the handset 2 is clearly indicated on the main body 3 finally, the holding operation can be performed without mechanically processing the main body 3 or the handset 2. You get a phone.

In each of the above-described embodiments, the case where the main body 3 of the button telephone 1 is provided with one ordinary handset cradle 7 has been described. However, a holding handset cradle is separately provided in the main body 3 to clarify the holding position. Still another configuration of the telephone will be described with reference to FIG.

FIGS. 6A and 6B are a plan view and a front view showing a wall-mounted button telephone 1 in which a holding cradle is provided in a main body 3, and FIG. 7 shows an assembled state diagram of the button telephone shown in FIGS. 6A and 6B. Therefore, the configuration of the telephone 1 of the present example will be described with reference to FIGS. 6 and 7. However, the same components as those in FIGS. 1 to 5 will be assigned the same reference numerals and overlapping description will be omitted.

The main body 3 of the button telephone 1 is formed into a substantially horizontally long rectangular parallelepiped shape, and in a US house or the like, a wall surface 8 is provided with a modular port 19 which serves as a telephone connection port, and is fitted into this modular port. A plug provided on the bottom surface of the main body 3 is inserted into a connector for a telephone line to make an electrical connection, and a wall-mounted telephone can be suspended with one touch so as to completely hide the modular opening 19 of the wall 8. Made with structure.

In FIG. 7, the main body 3 has a structure in which an upper half 3A and a lower half 3B, which are substantially box-shaped synthetic resin, are opposed to each other and integrated, and are arranged in a substantially middle position of the lower half 3B. The plug 20 is inserted into a plug seat provided in the modular port 19 of the wall surface 8 to exchange a line, and the hooking protrusion provided in the modular port 19 is locked to the locking hole 21a.
And 21b to insert the telephone body 3 into the wall surface 8
To suspend. Reference numeral 23 is a memory card sheet, on which personal names corresponding to the abbreviated numbers are written, which is stored between the bottom plate and the wall surface of the lower half 3A when not in use, and the knob 2 when used.
As shown in FIG. 6A, 3a is pulled out in the direction of arrow A so that the contents of the memo can be easily seen even in a wall-mounted state.
Further, as will be described later, a holding button 22 is attached to the lower half 3B.

The printed circuit board 2 is provided in the lower half 3B described above.
5 is attached via the screw 24. A slide switch group 26 is provided on the substrate 25 so as to project from the side wall of the lower half 3B.
Is attached. For example, 26a in the slide switch group 26 is a dial mode switching slide switch for switching between pulse and tone, 26b is a switching slide switch for switching the bell volume to high, low and "off", and 26c is a speaker volume. The slide switch for switching switches between high, medium and low tones. 27 is a connector for a handset, which is connected to a handset cord 28, 29
Is a holding switch, and 30 is a hook button. A ringer speaker 32 is housed in a notch 31 of the substrate 25, and the speaker 32 is held below the holding cradle 33 of the upper half 3A. Reference numeral 36 is a 13P connector connected to a key substrate (not shown) provided at the lower end of the upper half 3A and connected to the dial keys 9 and the like.

A normal cradle 7 for the handset 2 is formed as a semicircular recess 37 on the upper left side of the upper half 3A, and a part of the hook button 30 mounted on the substrate 25 is formed at the lower end of the semicircular recess 37. A through hole 38 for projecting is formed.

Similarly, an elliptical recess 34 into which the receiver head 16R of the handset 2 can be inserted is formed under the ordinary cradle 7 described above, and a sound output hole 35 of the speaker 32 is formed in the bottom of the recess 34. Board 25
A holding hole 22 is formed to project a part of the holding button 22 mounted on the above, and constitutes a holding cradle 33 as a whole.

A mountain-shaped protrusion 40 is formed on the lower side of the holding cradle 33, and the protrusion 40 serves as a hook when the receiver head of the handset 2 is suspended in the recess 34 of the holding cradle 33.

On the right side panel portion of the upper half 3A, an on-hook dial key 41, an on-hook LED 42, a speed dial key 43 and the like are provided in addition to the dial key 9.

FIG. 8 shows the operations of the hook button 30 and the hold button 22 in the normal non-call state and the hold state of the wall-mounted button telephone 1 described above. FIG. 8 is a schematic left-side cross-sectional view showing a state in which the handset 2 is suspended on the holding cradle 33 of the key telephone 1 and a state in which the handset 7 is suspended on the normal cradle 7, and as shown by a virtual line, , A suspended state in which the handset head 16R is hooked in the semicircular recess 37 of the ordinary cradle 7 (actually, the hooking protrusion provided on the upper half 3A is engaged with the engaging recess 18 provided at the lower end of the handset head 16R of the handset 2. The hook button 3 is rotatably mounted on the substrate 25.
When the hook button 30 is rotated counterclockwise as shown by the phantom line by pressing the protruding surface from the through hole 38 of 0, the rotation fulcrum O ₁ is the center, and the hook switch 45 is "disconnected" ( When the handset 2 is lifted from the cradle 7, the hook switch 45 is brought into a "contact" (off-hook) state and is connected to the central line.

When trying to put on hold while grasping the central line, the handset 7 lifted from the cradle 7
The receiver head 16R of the recessed portion 3 of the cradle 33 for holding
4 and the hooking protrusion 40a formed on the upper surface of the protrusion 40 is engaged with the engaging recess 18 formed on the lower surface of the receiver head 16R.
The holding buttons 22 attached to the tips of the arms 22a, 22a rotatably mounted on the lower half 3B around a rotation fulcrum O ₂ partially protrude from a through hole 39 formed in the recess 34. Therefore, the lower surface of the receiver head 16R is pressed downward, and the arms 22a and 22a are rotated fulcrum O.
Rotate clockwise around ₂ as shown by the phantom line in arm 2
The holding switch 29 provided at the lower ends of the 2a and 22a is pressed to be on-hook and "disconnected", but as described later, it is electrically held. Further, when the receiver head 16R of the handset 2 is detached from the holding cradle 33, the holding state is electrically released.

The principle circuit configurations of the hook switch 45 and the holding switch 29 will be described with reference to FIG. Actual circuits of the hook switch 45 and the holding switch 29 are provided in a path for supplying a reception voltage rectified by a power supply circuit to a dialer circuit from a transmission / reception terminal of a central line through a noise filter, which will be described later.

As shown in FIGS. 9A to 9D, the hook switch 45
The holding switch 29 (45 and 29 are two-contact switches, respectively) is connected in parallel between the dialer circuit and the power supply circuit to which the voltage obtained by rectifying the signal supplied to the station line input terminal is supplied. Switches 45 and 29 are connected in series. A line switch 50 (which is actually inserted in a circuit system for "connecting" and "disconnecting" the line, which will be described later) is electrically connected to the holding switch 29 in parallel.

FIG. 9A shows the handset 2 on the cradle 7.
Is suspended, and the handset 2 is not suspended on the holding cradle 33. The hook switch 45 is in the on-hook state and is "off", and the holding switch 29 is in the off-hook state and is "connect". . Also, the line switch 50 is in the "off" state.

From the on-hook state shown in FIG. 9A, the handset 2 suspended from the cradle 7 is separated from the on-hook state as shown in FIG.
5 is in the off-hook state and is in the "contact" state, and the hold switch 29 is in the "hook" state in the off-hook state, so that communication is possible.

Next, when the handset 2 separated from the cradle 7 is suspended on the holding cradle 33 in order to perform operations such as station line call → holding → transmission calling, FIG.
When the hook switch 45 is off-hook,
Since the hold switch 29 is turned off in the on-hook state, the detector 46 detects that the handset 2 is suspended on the hold cradle 33 and the line switch 50 is turned on as shown in FIG. 9D. Put in the “contact” state. This suspension detection signal is actually applied to the dialer circuit, and the line switch 50 is controlled by the dialer circuit.
Therefore, in FIG. 9D, the hook switch 45 of the cradle 7 is
Is off-hook, and the holding switch 29 of the holding cradle 33 keeps the line held even when the hook is on. Of course, the line switch 50 becomes "off" when the handset 2 is removed from the holding cradle 33. .

Next, as shown in FIG. 9D, one wall-mounted telephone is in a hold state, and further transferred or transferred to another telephone 1A connected in parallel to the line of this wall-mounted telephone 1 through the modular port 19 in the house. The configuration in the case of switching will be described with reference to FIGS. 10A and 10B.

The handset 2 is hung on the holding cradle 33 of the second wall-mounted telephone 1 and the second telephone 1A connected in parallel to the internal telephone line 49 has the hook switch 48 in the on-hook state as shown in FIG. 10A. Although there is no particular problem in the “off” state, as shown in FIG. 9B, when the second telephone 1A is put into the off-hook state, the handset 2 of the hook switch 48 not only picks up noise around the first telephone 1. The voltage of the internal telephone circuit 49 also drops. Therefore, as shown in FIGS. 10A and 10B, the voltage drop across the internal telephone line 49 is detected by the voltage detector 47, and as shown in FIG. 10B, the voltage drop of the first telephone set 1 has become equal to or lower than a predetermined threshold value. When this is detected, the line switch 50 is turned off and the hold state is automatically released. The voltage detection output described above is given to the automatic hold release detection circuit, and the line switch 50 is controlled via this circuit. Second telephone 1A
The off-hook state allows the first telephone 1 to be automatically released from the hold state, so that a telephone capable of preventing deterioration of sound quality and mixing of noise due to voltage drop of the internal telephone line can be obtained.

An actual circuit configuration diagram in the telephone of the hook switch 45 and the holding switch 29 will be described with reference to FIG.

In FIG. 11, T is a signal transmitting terminal and R is a receiving end.
The reference numeral 51 is a power supply circuit having a diode bridge configuration,
The output of the power supply circuit 51 is output via the bell circuit 52 to the speaker 3
Sound the tone ringer from 2 and through the resistor 53
V on the dialer circuit (IC) 54 _DDSupply voltage. this
V_DDA hook switch 45 and a holding switch are provided in parallel with the supply circuit.
The series circuit of the switch 29 is connected. This hook switch and
And the switch for holding are similar to the two-pole double-throw electrodes 45 and 45a.
The switch is composed of 29 and 29a.

One end of the first contact 45 of the hook switch is connected to the output end of the power supply circuit 51, the other end is connected in series with the first contact 29 of the holding switch, and the first contact of the holding switch is connected. The other end of 29 is connected to the base of the switching transistor 55 and the anode of the diode 56. The emitter of the transistor 55 is connected to the second contact 45a of the hook switch, and the other end of the second contact 45a of the hook switch is grounded. Diode 5
The cathode of 6 is connected to the collector of the transistor 55 via the resistor 57, and a hook signal is output from the collector to the dialer circuit 54.

The power supply circuit 51 is a first transistor 5 which constitutes a circuit connection / disconnection switch (line switch) 50.
0a of the first transistor 50a connected to the emitter of
Is connected to the speech circuit 58 and the automatic hold / release detection circuit 59. The speech circuit 58 transmits / receives a transmission / reception signal. Further, in the speech circuit 58, by holding the second contact 29a of the holding switch whose one end is grounded, the holding sound from the holding sound generator 60 is emitted to the receiver and the line. The detection output of the automatic hold and release detection circuit 59 is connected to the base of the second transistor 50b of the line switch 50. The collector of the first transistor 50b is connected to the base of the first transistor 50a, and the emitter is grounded. In addition, dial pulse signal D from dialer circuit 54
P is supplied to the base of the second transistor 50b.

FIG. 11 shows an on-hook state in which the handset 2 is suspended on the cradle 7, but during communication, the first and second contacts 45 and 45a of the hook switch are in a "contact" state, which is "off-hook". In addition, since the first and second contacts 29 and 29a of the holding switch are also "off-hook" and in the "contact" state, the base of the transistor 55 is biased, the collector-emitter power source flows, and the dialer circuit 54 receives the hook signal. Is supplied.

When the hook signal is supplied, the dialer circuit 5
The dial pulse signal DP is supplied from 4 to the base of the second transistor 50b of the line switch 50 to turn on the second transistor 50b, bias the first transistor 50a, and turn on the first transistor 50a. When turned on, the speech circuit 58 inputs / outputs a transmission / reception signal.

Next, in the hold state, since the handset 2 is suspended on the hold cradle 33, the first and second contacts 29 and 29a of the hold switch are in the "off" state. In this state, the dial pulse signal DP is not supplied to the base of the second transistor 50b of the line switch 50, so that the line switch 50 is "off", but the automatic hold / release detection line 59 (suspension detector 46) has the hold cradle. 33 that the handset 2 is suspended and DP
The second transistor 50b is biased by detecting the state where there is no signal, and the line switch 50 is "contacted". Therefore, the hold state is maintained. Further, the holding sound generator 60 may be configured to generate the holding sound when the second contact 29a of the holding switch is in the "OFF" state.

Further, the automatic hold and release detection circuit 59 (voltage detector 57) detects that the telephone 1A connected in parallel to the extension described in FIGS. 10A and 10B is in the off-hook state, and the second transistor 50b is turned on. It can be automatically released by setting the line switch 50 to the inoperative state and turning off the line switch 50.

In each of the above-described embodiments, the wall-mounted type button telephone has been described, but it may be a desk-type button telephone, and in a button telephone having a built-in CPU or the like, a suspension detection signal, a voltage drop voltage, etc. The line switch 50 can be controlled by giving data to the CPU.

[0062]

According to the present invention, it is possible to obtain a telephone which can perform the holding function without the need to press the holding key. Furthermore, when holding the handset, the handset is placed in the holding cradle or another position, so the agent does not have to worry about returning the handset to the original handset cradle after pressing the hold key. Nor. Also, if the handset is suspended in the hold cradle, it is understood that the handset is on hold, and it can also be used as a hold display. Further, by putting the second telephone connected in parallel with the main telephone in the off-hook state, a simple telephone can be obtained which can automatically release the hold state of the main telephone.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a telephone of the present invention.

FIG. 2 is a side sectional view showing an embodiment of the telephone of the present invention.

FIG. 3 is a side sectional view showing another embodiment of the telephone of the present invention.

FIG. 4 is a side sectional view of a portion A in FIG. 3 showing another embodiment of the telephone of the present invention.

FIG. 5 is an explanatory view of another holding method of the telephone of the present invention.

FIG. 6 is a configuration diagram showing still another embodiment of the telephone of the present invention.

FIG. 7 is an assembly diagram of still another telephone of the present invention.

FIG. 8 is an operation explanatory diagram of a holding button and a hook button of still another telephone of the present invention.

FIG. 9 is an operation explanatory diagram of still another telephone according to the present invention.

FIG. 10 is an operation explanatory diagram of a telephone having another configuration of the present invention.

FIG. 11 is an actual circuit diagram of the telephone of the present invention.

FIG. 12 is a perspective view of a conventional telephone.

[Explanation of symbols]

 1 button telephone 2 handset 3 main body 7 handset cradle 13, 13L, 13R reed switch (magnetic sensor) 14, 14L, 14R magnet 22 holding button 29, 29a holding switch 30 hook button 33 holding cradle 45, 45a, 48 Hook switch 50 line switch

Claims (5)

[Claims] 1. A telephone having a telephone body and a handset, wherein the telephone body is provided with a holding function by placing the handset on the telephone body. 2. The telephone according to claim 1, wherein a holding cradle for performing a holding function is provided at a predetermined position of the telephone body. 3. The line holding circuit is automatically operated when the handset is placed on the telephone body or the holding cradle, and the line is automatically turned on when the handset is separated from the telephone body or the holding cradle. The telephone according to claim 1 or 2, wherein the holding circuit is released. 4. The telephone is automatically released from the hold state when the handset of another telephone connected in parallel to the same telephone line of the telephone is separated from the cradle. The telephone according to any one of claims 1 to 3. 5. A magnet and a reed switch are used as detection means for shifting to the holding function operation when the handset is placed on the telephone body or the holding cradle. The telephone set forth in any one of 1.