JPH0739078A - Charging apparatus of wireless telephone set - Google Patents

Abstract

PURPOSE:To charge a wireless telephone set while the telephone set and a charger are not in contact with each other. CONSTITUTION:The wireless telephone charging apparatus of a present invention has a charger 2E which has an output means 22 which outputs an energy based upon a power obtained from an AC power supply 21, a charging power generating means 15 and 13 which receives the energy outputted from the output means 22 of the charger 2E in an electrically noncontact state to generate a charging power and a wireless telephone set 1E which a secondary battery 11 which is charged by a power generated by the charging power generating means 15 and 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for a wireless telephone that makes a call via a wireless line, and more specifically, a charging device for charging the wireless telephone and a charger in an electrically non-contact state. It is about.

[0002]

2. Description of the Related Art Conventionally, a wireless telephone is charged by inserting the wireless telephone 70 into a container-shaped charger 80 as shown in FIG. In this conventional example, as shown in FIG. 9, a recess 86 for receiving the lower end of the wireless telephone 70 is formed in the upper center of the charger 80, and the bottom wall 83 of the recess 86 has charging power. A hole 82 for projecting the supply-side terminal 81 is formed. The supply terminal 81 is connected to a power supply circuit board 85 via a lead wire 84. On the other hand, at the bottom of the wireless telephone 70, a terminal 71 on the charging power receiving side is partially exposed and buried. When the bottom portion of the wireless telephone 70 is inserted into the concave portion 86, the supply side terminal 81 having a spring property comes into contact with the terminal 71 on the bottom portion of the wireless telephone 70 as shown in the figure, and charging is performed.

FIG. 10 shows a circuit configuration diagram of the above-mentioned conventional charging device. A predetermined voltage is applied to the power supply circuit 87 of the charger 80 from the adapter 90 that converts the voltage of the commercial power supply 92 into direct current by the AC / DC converter 91. On the other hand, the wireless telephone 70 is provided with a telephone circuit 72, and the telephone circuit 72 is supplied with power from a secondary battery 73. When the supply-side terminal 81 of the charger 70 contacts the terminal 71 of the wireless telephone 70, the secondary battery 73 is output by the output of the power supply circuit 87 of the charger 80.
Is charged.

[0004]

However, according to the above-mentioned conventional charging device, since terminals (metals) are provided on the charger and the wireless telephone, rust easily occurs, and the sealed state of the wireless telephone easily collapses. There have been problems such as loss of waterproofness. Further, on the charger side, in addition to the problem of rusting of the terminal, there is a problem that dust adheres to the hole portion where the terminal projects to impair charging.

The present invention has been made in view of the problems of the above-described conventional charging device for a wireless telephone, and an object thereof is to make the sealed state of the wireless telephone more perfect, excellent in waterproofness, and It is an object of the present invention to provide a charging device for a wireless telephone that can eliminate the need for performing maintenance in consideration of adhesion of rust and dust.

[0006]

Therefore, a charging device for a wireless telephone according to the present invention has a charger having an output means for outputting energy based on electric power obtained from an AC power source, and an output means from the output means of the charger. A wireless telephone including a charging power generation unit that receives the stored energy in an electrically non-contact state to generate charging power, and a secondary battery that is charged by the power generated by the charging power generation unit. And charging the secondary battery of the wireless telephone in an electrically non-contact state with the charger.

Further, the charging device for a wireless telephone according to the present invention includes a charger having an output means for converting electric power obtained from an AC power source into an electromagnetic force and outputting the electromagnetic force, and an electromagnetic force output from the output means of the charger. The wireless telephone includes a charging power generation unit that receives and converts the charging power into a charging power, and a secondary battery that is charged by the power generated by the charging power generation unit. It is characterized in that it can be carried out in a non-contact state with the charger.

Further, the charging device for a wireless telephone according to the present invention comprises a charger having an output means for outputting energy based on electric power obtained from an AC power source, and an energy output from the output means of the charger, A wireless telephone including a charging power generation unit that generates a charging power by being transmitted in a non-contact state, and a rechargeable battery charged by the power generated by the charging power generation unit; and the charger. Control means for detecting an energy coupling state with the wireless telephone and controlling ON / OFF of the switch based on the detection result, and electrically charging the secondary battery of the wireless telephone with the charger. It is characterized in that it is possible in the non contact state.

The charging device for a wireless telephone according to the present invention is characterized in that the charger having an output means for outputting energy based on the electric power obtained from the AC power source and the energy output from the output means of the charger are electrically connected to each other. A wireless telephone including a charging power generation unit that receives the charging power in a non-contact state to generate charging power, and a secondary battery that is charged by the power generated by the charging power generation unit; A control unit that detects an energy coupling state with the wireless telephone and controls ON / OFF of the switch based on the detection result, and the control according to a positional coupling state between the charger and the wireless telephone. An operation / non-operation switching means for switching the operation / non-operation of the means, and enabling charging of the secondary battery of the wireless telephone in an electrically non-contact state with the charger. That.

[0010]

According to the charging device for a wireless telephone having the above structure, the charger is provided with the output means for outputting energy based on the electric power obtained from the AC power source, while the wireless telephone is provided with the output of the charger. It is equipped with charging power generation means that receives the energy output from the means in an electrically non-contact state to generate charging power, and is required for charging without the need for a configuration such as electrically contacting terminals. Energy is transmitted, and the secondary battery is charged by the electric power generated by the charging power generating means.

Further, according to the charging device for a wireless telephone having the above structure, the charger is provided with the output means for converting the electric power obtained from the AC power source into the electromagnetic force and outputting the electromagnetic force. The charging power generation means for receiving the electromagnetic force output from the output means of the container and converting it into charging power is provided, and the energy required for charging without the need for a configuration such as a terminal electrically contacting by an electromagnetic induction action. Is transmitted, and the secondary battery is charged by the electric power generated by the charging power generating means.

Furthermore, according to the charging device for a wireless telephone having the above structure, in addition to the above, the charger is provided with a switch between the output means and the AC power source, and the switch is provided between the charger and the wireless telephone. The on / off control is performed based on the detection result of the energy coupling state of the device, so the switch is turned off when there is no energy coupling state between the charger and the wireless telephone, that is, when the wireless telephone is not charged. Therefore, it is possible to prevent an accident due to heat generation when a metal is placed on the charger when it is not charged.

Further, according to the charging device for a wireless telephone having the above structure, in addition to the above, it is configured to switch the operation / non-operation of the control means according to a positional connection state between the charger and the wireless telephone. Prevents the control means from turning on the above switch when the wireless telephone is not set in the charger and prevents accidents due to heat generation when metal is placed on the charger when not charging To do.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A charging device for a wireless telephone according to each embodiment of the present invention will be described below with reference to the accompanying drawings. In the description of each drawing, the same constituent elements will be denoted by the same reference symbols and redundant description will be omitted. First, an embodiment in which the present invention is applied to a cordless telephone device slave unit and its charger will be described. FIG. 1 shows a configuration diagram of a charging device including a cordless telephone 1E and a charger 2E. The charger 2E includes a primary coil 22 that converts the electric power of the commercial AC power supply 21 into an electromagnetic force. In addition, in fact,
The commercial AC power supply 21 is provided outside the charger 2E,
It is described inside the charger 2E for the sake of illustration. The terminals and the like do not protrude from the housing of the charger 2E, and the internal members are in a sealed state.

The cordless telephone 1E includes a secondary battery 11
Is provided. A secondary coil 15 is connected to the secondary battery 11 via an AC / DC converter 13. Two
A telephone circuit 12 that receives power is connected to the secondary battery 11. Charger 2E and cordless telephone 1E
8 has the same shape as the conventional one, and when the cordless telephone 1E is set (inserted) in the charger 2E, the primary coil 22 and the secondary coil 15 are positioned so as to be electromagnetically coupled. To be The terminals and the like do not protrude from the housing of the cordless telephone 1E, and the internal members are in a sealed state.

Therefore, in the charger 2E, when the power of the commercial AC power supply 21 is supplied to the primary coil 22, a magnetic flux is generated from the primary coil 22. At this time, if the cordless telephone 1E is set in the charger 2E, an alternating current is generated in the secondary coil 15 by electromagnetic induction, and the voltage due to this alternating current is converted into direct current by the AC / DC converter 13 to generate the secondary current. It is applied to charge the battery 11.

With the above configuration, the cordless telephone 1
The rechargeable battery 11 of E is charged by the non-contact method, but the metal other than the cordless telephone 1E is the charger 2
When placed on E, the metal is heated due to induction by the magnetic flux generated from the primary coil. In particular, in order to charge the secondary battery 11 of the cordless telephone 1E, a relatively large amount of electric power is required, and the temperature of the metal becomes considerably high. Therefore, when touching metal, there is a possibility of being burned, and there is a problem that the housing of the charger 2E is deformed.

Therefore, in the present embodiment shown in FIG. 2, a switch 23 is provided in a path for supplying electric power to the primary coil 22 from the commercial AC power source 21. The switch 23 is turned on / off by a control signal from the detection circuit 26 of the control unit 24. The detection circuit 26 is a secondary coil 25 for detecting an energy coupling state between the charger 2 and the cordless telephone 1.
The switch 23 is turned on by detecting the current flowing through the switch. 9, the primary coil 22 is arranged in the center of the opening 86 of the charging device 80, and one or more secondary coils 25 are arranged around the primary coil 22. The detection circuit 26 is, for example,
The switch 23 is composed of a current detection circuit and a relay or driver that operates by this detection output, and the switch 23 is composed of a relay contact, a semiconductor switch, or the like. On the other hand, in the cordless telephone 1, the secondary battery 11 has a DC / A
A C converter 14 is connected, and a primary coil 16 through which an output current of the DC / AC converter 14 is supplied is provided. The primary coil 16 and the secondary coil of the charger 2 are coupled. The switch 23 of the charger 2 is kept off in the normal state. Therefore, the cordless telephone 1 is connected to the charger 2 as in the conventional example shown in FIG.
When is set, an induction current flows in the secondary coil 25 of the charger 2 due to the magnetic flux generated by the output current of the DC / AC converter 14 of the cordless telephone 1 flowing in the primary coil 16, and the detection circuit 26 Detects the current flow and closes the switch 23. As a result, magnetic flux is generated from the primary coil 22 and charging is performed only when the cordless telephone 1 is set in the charger 2.
On the contrary, when the cordless telephone 1 is separated from the charger 2, 1
The electromagnetic coupling between the secondary coil 16 and the secondary coil 25 is cut off, and the current does not flow in the secondary coil 25.
The detection circuit 26 detects this and switches the switch 23 to the off state. That is, it ensures that the cordless telephone 1 is charged only when it is set in the charger 2. Further, even if a metal or the like is placed on the charger 2, since the switch 23 is released, it is possible to prevent induction heating due to the magnetic flux of the primary coil 22.

FIG. 3 shows a charging device for a cordless telephone according to the third embodiment. In this embodiment, while the embodiment of FIG. 2 is configured so that the current always flows through the primary coil 16, the primary coil 16 is provided depending on the positional connection between the charger and the cordless telephone. It has a configuration for controlling whether or not to supply a current. That is, the magnet switch 3 controls whether or not a current is passed through the primary coil 16. The switch 31 of the magnet switch 3 is provided in the path through which the output of the DC / AC converter 14 is given to the primary coil 16 of the cordless telephone 1A. on the other hand,
The charger 2A has a cordless telephone 1 attached thereto.
When A is set as shown in FIG.
The magnet 32 is provided at a position where the magnet can be driven. When the magnet 32 is buried, it is suitable from the viewpoint of waterproofness. According to such a configuration, the switch 31 is set only when the cordless telephone 1A is set in the charger 2A.
Is closed and a magnetic flux is generated by the primary coil 16, an induced current flows in the secondary coil 25 of the charger 2, and the detection circuit 26
Detects the current flow and closes the switch 23. Thus, magnetic flux is generated from the primary coil 22 and charging is performed.

FIG. 4 shows a charging device for a cordless telephone according to the fourth embodiment. In this embodiment, an optical switch 3A is used instead of the magnet switch 3 shown in FIG. The switch 33 of the optical switch 3A is provided on the path through which the output of the DC / AC converter 14 is given to the primary coil 16 of the cordless telephone 1B. On the other hand, in the charger 2B, when the cordless telephone 1B is set in the charger 2B as shown in FIG. 8, a position where the switch 33 composed of the light receiving element or the like can be driven (the light receiving element and the light emitting element face each other). Light emitting element 34
Is provided. Also in this embodiment, similarly to the embodiment shown in FIG. 3, only when the cordless telephone 1B is set in the charger 2B, the switch 31 is closed, the magnetic flux is generated by the primary coil 16, and charging is performed. Will be seen.

FIG. 5 shows a charging device for a cordless telephone according to the fifth embodiment. In this embodiment, a mechanical switch 3B such as a micro switch is used in place of the magnet switch 3 shown in FIG. The contact portion 35 of the mechanical switch 3B is provided on the path through which the output of the DC / AC converter 14 is given to the primary coil 16 of the cordless telephone 1B. The contact portion 35 of the mechanical switch 3B is
This surface is covered with thin plastic etc.,
The seal of the cordless telephone 1C is maintained, and the operation of the contacts by pressing is guaranteed. On the other hand, in the charger 2C,
When the cordless telephone 1C is set in the charger 2C as shown in FIG. 8, it is located at a position facing the contact portion 35 and functions to press the contact portion 35 to close the contact. Are formed. According to this embodiment, as in the embodiment shown in FIG. 3, when the cordless telephone 1C is set in the charger 2C, the convex portion 36 closes the contact portion 25, so only in such a case. The switch 31 is closed, and the primary coil 16 generates a magnetic flux, so that charging is performed.

FIG. 6 shows a charging device for a cordless telephone according to the sixth embodiment. In this embodiment, the charger 2D includes a primary coil 22 and a secondary coil 15 for charging.
A feedback coil 27 for detecting the leakage magnetic flux of the coupling with is provided. For example, when the charger 3D has a container shape as shown in FIG. 8, the primary coil 22 is located at the center of the bottom wall of the hole, and the feedback coil 27 is the number of peripheral portions of the bottom wall of the hole. It is provided in the place. Of course, all of the coils are sealed, as in the previous embodiments. As shown in FIG. 7, the detection circuit 41 included in the control unit 4 constitutes a current-voltage conversion unit 41A that converts the current flowing through the feedback coil 27 into a voltage. The control unit 4 compares the output voltage of the current-voltage conversion unit 41A with a predetermined threshold voltage output from the threshold generation unit 43, and outputs a control signal when the voltage falls below a predetermined threshold,
A drive unit 44 for turning on / off the switch 23 in response to the control signal from the comparison unit 42 is provided. Threshold generator 43
The predetermined threshold voltage output from the primary coil 2 for charging is
The voltage is slightly higher than the voltage corresponding to the leakage flux when the secondary coil 15 and the secondary coil 15 are energetically coupled, and the switch 23 can continue to be turned on even if the detection is made as if the leakage flux increased due to disturbance or the like. Is configured.

According to the charging device for a cordless telephone having the above structure, when the cordless telephone 1D is detached from the charger 2D, the switch 23 is initially opened, so that there is no leakage magnetic flux and the comparison section 42 is controlled. A signal is output, which causes the drive unit 44 to close the switch 23. Therefore,
The magnetic flux generated from the primary coil 22 becomes a leakage magnetic flux and reaches the feedback coil 27, and the current-voltage conversion unit 4
The output voltage of 1 A becomes higher than the threshold voltage. This allows
The control signal of the comparison unit 42 is stopped, and the drive unit 44 opens the switch 23. Further, since the leakage magnetic flux disappears, the above operation is repeated.

On the other hand, when the cordless telephone 1D is set in the charger 2D and the switch 23 is closed in the same manner as described above, the charging primary coil 22 and the secondary coil 15 are coupled to each other, and the leakage magnetic flux is generated. Relatively less. Therefore, the output voltage of the current-voltage conversion unit 41A is lower than the predetermined threshold voltage output from the threshold generation unit 43, and the comparison unit 4
The control signal continues to be output from 2. Thus, the secondary battery 11 of the cordless telephone 1D can be continuously charged.

In the above embodiment, when the cordless telephone 1D is not set in the charger 2D, the switch 23 is repeatedly turned on and off frequently. Therefore, as shown by the broken line in FIG. 7, a timer unit 45 is provided that starts when the control signal of the comparison unit 42 is no longer output. The timer unit 45 gives a lock signal to the drive unit 44 for a predetermined time (about several minutes) after becoming a star so that it is not controlled by the comparison unit 42. This can prevent wasteful power consumption. At the time of charging, since the control signal of the comparison unit 42 is transmitted, the timer unit 45 does not start.

In each of the above embodiments, the charging power is transferred in a non-contact manner by using electromagnetic induction, but in other embodiments, the charging power is transferred in a non-contact manner by using light energy or the like. This method is currently inefficient and difficult to adopt,
Any improvements in efficiency could be adopted. Further, in the above-described embodiment, the detection of the energy coupling state between the charger and the cordless telephone is also made possible by the non-contact method using the electromagnetic induction method. In that case, a method based on photoelectric conversion is adopted.

The present invention is not limited to the cordless telephone device shown in each of the above embodiments. For example, it can be naturally applied to a car phone device in which a cradle (the phone body of the car phone) and a handset (handset part) are connected by a wireless line, and a wireless phone other than a cordless phone such as a mobile phone. is there. In this case, a car phone, a mobile phone, and the like are considered to be used outdoors, and therefore the use of the charging device of the present invention is very preferable because the waterproof effect is extremely high.

Further, in addition to the above-mentioned wireless telephone, the present invention can be applied to an electronic device which is currently supplying electric power by an electric wire, and particularly needs to be waterproof, and is extremely useful. Conceivable. For example, application of the present invention to an iron or the like is effective because the waterproof effect is enhanced.

[0029]

As described above, according to the present invention, the energy required for charging is transmitted and charging is performed without the need for a terminal or the like that makes electrical contact. For this reason, the terminal does not rust, and the sealed structure is easy and the waterproof property is excellent. Further, maintenance such as cleaning the terminal portion of the charger and dust such as holes for projecting the terminal is unnecessary.

Further, according to the present embodiment, the switch can be turned off when the charger and the wireless telephone are not in the energy-coupled state, that is, when the wireless telephone is not charged, the It is possible to prevent accidents due to heat generated when metal is placed on the charger during charging and prevent damage to the charger housing.

Furthermore, according to the present invention, the control means is configured to switch the operation / non-operation depending on the positional connection state between the charger and the radio telephone, so that malfunction and power consumption due to unnecessary control can be achieved. There is an effect that can reduce.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a charging device for a wireless telephone according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a charging device for a wireless telephone according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a charging device for a wireless telephone according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a charging device for a wireless telephone according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a charging device for a wireless telephone according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a charging device for a wireless telephone according to a sixth embodiment of the present invention.

7 is a block diagram of a main part of a charging device for a wireless telephone according to the embodiment of FIG.

FIG. 8 is a perspective view of a conventional example.

FIG. 9 is a sectional view of a main part of a conventional example.

FIG. 10 is a configuration diagram of a conventional example.

[Explanation of symbols]

1, 1A, 1B, 1C, 1D, 1E Cordless telephone 2, 2A, 2B, 2C, 2D, 2E Charger 3 Magnet switch 3A Optical switch 3B Mechanical switch 4 Control circuit 11 Secondary battery 12 Telephone circuit 13 AC / DC converter 14 D
C / AC converter 15 Secondary coil 16 1
Next coil 21 Commercial AC power supply 22 1
Next coil 23 Switch 24 Control circuit 25 Secondary coil 26 Detection circuit 27 Feedback coil 31 Switch 32 Magnet 33 Switch 34 Light emitting element 35 Contact part 36 Convex part 41 Detection circuit 41A Current-voltage conversion part 42 Comparison part 43 Threshold generation part 44 Drive Part 45 timer part

Claims (4)

[Claims] 1. A charger having an output means for outputting energy based on electric power obtained from an AC power source, and energy received from the output means of the charger is transmitted in an electrically non-contact state. And a charging device for generating charging power, and a wireless telephone including a secondary battery charged by the power generated by the charging power generating device. The charging of the secondary battery of the wireless telephone is performed by the charging. A charging device for a wireless telephone, which is capable of being brought into electrical contact with the device. 2. A charger having output means for converting electric power obtained from an AC power source into electromagnetic force and outputting the electromagnetic force, and charging for receiving electromagnetic force output from the output means of the charger and converting it into charging power. The wireless telephone includes a power generation unit and a secondary battery charged by the power generated by the charging power generation unit. The secondary battery of the wireless telephone is electrically non-contacted with the charger. A charging device for a wireless telephone, which is enabled in a state. 3. A charger having output means for outputting energy based on electric power obtained from an AC power supply, and energy received from the output means of the charger is transmitted in a non-contact state electrically. Charging power generating means for generating charging power by means of charging, and a wireless telephone provided with a secondary battery charged by the electric power generated by the charging power generating means, and energy between the charger and the wireless telephone. A control unit that detects a coupling state and controls ON / OFF of the switch based on the detection result, and enables charging of the secondary battery of the wireless telephone in an electrically non-contact state with the charger. Characteristic wireless phone charging device. 4. A charger having output means for outputting energy based on electric power obtained from an AC power supply, and energy received from the output means of the charger is transmitted in an electrically non-contact state. Charging power generating means for generating charging power by means of charging, and a wireless telephone provided with a secondary battery charged by the electric power generated by the charging power generating means, and energy between the charger and the wireless telephone. A control unit that detects a connection state and controls ON / OFF of the switch based on the detection result, and an operation unit that switches between operation and non-operation of the control unit according to a positional connection state between the charger and the wireless telephone. A charging device for a wireless telephone, comprising: an operation switching means, and capable of charging a secondary battery of the wireless telephone in an electrically non-contact state with the charger.