JPH0588052U - Cordless phone charger - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if a large charging current is supplied, sparks are prevented from occurring between the charging contact and the charging terminal spring when the cordless telephone is detached, and contact failure is prevented. [Configuration] Charging stand 12 on which the cordless telephone 1 can be placed
And a charging circuit 13 housed inside the charging stand 12 and an end face of the receiving section 17 of the charging stand 12 and connected to the charging circuit 13 so as to come into contact with the charging contact 3 of the cordless telephone 1. A charging terminal spring 19 and a changeover switch 14 having a push button 14a for switching the charging circuit 13 to an open state when the cordless telephone 1 is pressed by placing the cordless telephone 1, and when the cordless telephone 1 is detached from the charging base 12. First, the charging circuit 13 is switched to the open state before the charging contact 3 is separated from the charging terminal spring 19. An optical sensor or a proximity switch may be used instead of the switch 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a charging device used for a cordless telephone.

[0002]

[Prior Art]

 FIG. 5 shows the configuration of a conventional charging device of this type. In FIG. 5, reference numeral 1 denotes a cordless telephone having a rechargeable storage battery built therein, and a pair of charging contacts 3 are provided on an end surface of a casing earpiece 2. Reference numeral 31 denotes a charging device, which has a charging base 32 on which the cordless telephone 1 can be placed substantially horizontally and which is connected to a charging circuit 33 inside the charging base 32 and has a power adapter 34 at its tip. Is provided. The earpiece receiving portion 36 of the charging base 32 capable of accommodating the housing earpiece 2 of the cordless telephone 1 is provided with a pair of holes 37 on the end faces facing the pair of charging contacts 3 provided on the housing earpiece 2. A pair of charging terminal springs 38 that are connected to the charging circuit 33 and contact the respective charging contacts 3 of the cordless telephone 1 are provided in these holes 37.

Next, the operation of the above conventional example will be described. In the above-mentioned conventional example, when the cordless telephone 1 is placed on the charging stand 32 and the housing earpiece 2 of the cordless telephone 1 is fitted into the earpiece receiver 36, the charging contacts on the end surface of the housing earpiece 2 are charged. 3 contacts the charging terminal springs 38 on the end face of the earpiece receiving part 36 in a pressed state, the charging current is supplied from the charging device 31 to the cordless telephone 1, and the storage battery built in the cordless telephone 1 is charged. To be done. When the cordless telephone 1 is picked up from the charging stand 32 and detached, the charging contacts 3 of the cordless telephone 1 are separated from the charging terminal springs 38 of the charging device 31 and the charging is stopped.

As described above, also in the above-described conventional charging device 31, the cordless telephone 1 can be charged simply by placing the cordless telephone 1 on the charging stand 32, and can be charged only by detaching it from the charging stand 32. Can be stopped.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional charging device, when a large charging current is supplied to the cordless telephone, a spark is generated between each charging contact and the charging terminal spring when the cordless telephone is detached from the charging device. There was a problem that the contact part deteriorated and contact failure occurred.

The present invention solves such a conventional problem. Even when a large charging current is supplied to the cordless telephone, the cordless telephone is separated from the charging contact and the charging terminal spring when the cordless telephone is detached. It is an object of the present invention to provide an excellent charging device capable of preventing the generation of sparks.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a switch means for switching the charging circuit to an open state before the charging contact of the cordless phone is separated from the charging terminal spring when the cordless phone is detached from the charging stand. Be prepared.

[0008]

[Action]

 Therefore, according to the present invention, when the cordless telephone is detached from the charging stand, the charging circuit is switched to the open state by the switch means before the charging contact of the cordless telephone is separated from the charging terminal spring. Even if a large charging current is supplied to the cordless phone, it is possible to prevent sparks from being generated between the contacts.

[0009]

【Example】

 FIG. 1 shows the configuration of the first embodiment of the present invention. Note that FIG. 1 shows a cordless telephone 1 similar to that used in the conventional example. In FIG. 1, reference numeral 11 is a charging device, which has a charging stand 12 on which the cordless telephone 1 can be mounted substantially horizontally, and as shown in FIG. And a changeover switch 14 for opening and closing the charging circuit 13. A cord 16 connected to the input side of the charging circuit 13 and having a power adapter 15 at its tip is provided at the rear of the charging base 12. An earpiece receiving part 17 capable of accommodating the case body 2 of the cordless telephone 1 of the charging base 12 has a pair of holes 18 on the end face of the end face of the case 2 facing the charging contact 3. A pair of charging terminal springs 19 connected to the output side of the charging circuit 13 are arranged in the hole 18 of the housing, and a hole 21 is formed in the bottom surface 20 facing the front surface of the casing earpiece 2. Charging is performed from this hole 21. The push button 14a of the changeover switch 14 connected to the circuit 13 is projected.

Next, the operation of the first embodiment will be described with reference to FIGS. 2 and 3. In the first embodiment, by placing the cordless telephone 1 on the charging stand 12 of the charging device 11, the charging contacts 3 on the end face of the case receiver 2 of the cordless telephone 1 are connected to the end face of the receiver 17 on the end face. The charging is performed by contacting the charging terminal spring 19. In this case, when the housing earpiece 2 is fitted into the earpiece receiver 17, the charging contact 3 first contacts the charging terminal spring 19, and the front surface of the housing earpiece 2 is the earpiece receiver. The push button 14a on the bottom surface 20 is brought into contact with and pressed. Then, as shown in FIG. 3 (a), when the casing earpiece 2 is completely on the bottom surface 20 of the earpiece, the push button 14a is pushed below the bottom surface 20. By the operation of, the changeover switch 14 switches the charging circuit 13 to the closed state. As a result, the charging current is supplied from the charging device 11 and the storage battery built in the cordless telephone 1 is charged.

Further, by picking up the cordless telephone 1 from the charging stand 12 and detaching it, the charging contacts 3 of the cordless telephone 1 are separated from the charging terminal springs 19 of the earpiece receiver 17, and the charging is stopped. In this case, when the housing earpiece 2 is separated from the bottom surface 20 of the earpiece, as shown in FIG. 3 (b), the push button 14a is pushed before the charging contact 3 and the charging terminal spring 19 are separated. Is returned to the original protruding state, and the changeover switch 14 switches the charging circuit 13 to the open state by the operation of the push button 14a. That is, after the charging current flowing through the charging terminal spring 19 is cut off, the charging contact 3 of the cordless telephone 1 and the charging terminal spring 19 of the charging device 11 are separated from each other.

As described above, according to the first embodiment described above, when the cordless telephone 1 is placed on the bottom surface 20 of the receiving section of the charging stand 12 and is pushed by the front surface of the case receiving section 2 of the cordless telephone 1. A changeover switch 14 having a button 14a is provided so that when the cordless telephone 1 is detached from the charging stand 12, the charging circuit 3 is switched to the open state before the charging contact 3 is detached from the charging terminal spring 19. Therefore, even if a large charging current is supplied to the cordless telephone 1, it is possible to prevent sparks from being generated between the charging contact 3 and the charging terminal spring 19 and prevent deterioration of the contact portion.

FIG. 4 shows the configuration of the second embodiment of the present invention. The same members as those in the first embodiment are designated by the same reference numerals. In this embodiment, an optical sensor 24 that switches the charging circuit 13 to the open state by detecting a level above a certain level of illuminance is provided on the bottom surface 20 of the receiving section of the charging stand 12 to charge the cordless telephone 1. When it is lifted from the stand 12, the light sensor 24 is activated by the light entering the earpiece receiver 17, and the charging circuit 13 is opened before the charging contact 3 is separated from the charging terminal spring 19. It can be switched to the state. Even in this case, similarly to the first embodiment described above, even if a large charging current is supplied to the cordless telephone 1, it is possible to prevent the generation of sparks between the charging contact 3 and the charging terminal spring 19. Therefore, it is possible to prevent deterioration of the contact portion. Further, since the internal contacts, which are different from those of the mechanical type changeover switch, are not consumed, the reliability can be further improved. Note that a similar effect can be obtained even if a proximity switch is provided instead of the optical sensor.

[0014]

[Effect of the device]

 As apparent from the above embodiment, the present invention is provided with a switch means for switching the charging circuit to the open state before the charging terminal of the cordless telephone is separated from the charging terminal spring when the cordless telephone is detached from the charging stand. Therefore, even if a large charging current is supplied to the cordless phone, it is possible to prevent sparks from being generated between the charging contact of the cordless telephone and the charging terminal spring of the charging device, and contact due to deterioration of the contact part. This has the effect of preventing defects. Further, by using an optical sensor or a proximity switch as a switch step, the reliability of the device can be further enhanced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a charging device and a cordless telephone according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of the charging device.

FIG. 3A is a schematic cross-sectional view showing a state when the cordless telephone is placed on the charging device. FIG. 3B is a schematic cross-sectional view showing a state when the cordless telephone is detached from the charging device.

FIG. 4 is a schematic perspective view of a charging device and a cordless telephone according to a second embodiment of the present invention.

FIG. 5 is a schematic perspective view of a conventional charging device and a cordless telephone.

[Explanation of symbols]

 1 Cordless Telephone 2 Case Receiver 3 Charging Contact 11 Charging Device 12 Charging Platform 13 Charging Circuit 14 Changeover Switch 14a Push Button 15 Power Adapter 16 Cord 17 Earpiece Receiver 18 Hole 19 Charging Terminal Spring 20 Bottom 21 Hole 24 Optical Sensor

Claims (3)

[Scope of utility model registration request] 1. A charging stand on which a cordless telephone can be placed, a charging circuit housed inside the charging stand, and a charging circuit for charging the cordless telephone connected to the charging circuit and placed on the charging stand. A charging terminal spring contacting the contact, and a switch means for switching the charging circuit to an open state before the charging contact of the cordless telephone separates from the charging terminal spring when the cordless telephone is detached from the charging stand. Charging device for cordless telephone equipped with and. 2. The switch means is a push button switch which is pressed by placing the cordless telephone.
Charging device for the cordless telephone described. 3. The charging device for a cordless telephone according to claim 1, wherein the switch means is an optical sensor or a proximity switch that operates by attaching and detaching the cordless telephone.