JP4507383B2 - Communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication device that communicates via a telephone line, and more particularly to a charging terminal peripheral structure for charging a battery built in a mobile device.
[0002]
[Prior art]
In general, cordless phones charge the slave unit when the slave unit (mobile unit) is placed on the base of the base unit (fixed unit), and insulate the charging terminal of the master unit from the telephone line when the slave unit is not installed. It is configured to prevent electric shock. The charging terminal of the main unit is usually arranged and fixed so as to be exposed on the pedestal, and the line connected to the telephone line on the circuit board to insulate the exposed part of the charging terminal from the telephone line The network side and the charging terminal side are divided and connected between them using insulating parts such as a transformer, a photocoupler, a relay, and a capacitor.
[0003]
In addition, as a method of insulation from the telephone line without using an insulation component such as a transformer, an insulation switch having a lever that can contact the slave unit is provided inside the master unit charging terminal, When the slave unit is not mounted on the main unit, the charging terminal of the master unit is disconnected from the charging circuit by the internal switch and insulated from the telephone line. When the slave unit is mounted on the master unit, There is one that starts charging the battery inside the slave unit by connecting the charging terminal and the charging circuit by the pushed lever. In other words, a switch is provided in the main unit charging terminal to provide insulation between the charging circuit and the charging terminal, and the applicant previously proposed a patent application for this.
[0004]
Further, as a structure that prevents the human body from directly touching the charging terminal, those described in Japanese Patent Laid-Open Nos. 4-200046 and 6-326644 are known. In the former, a charging terminal structure is provided on the back surface of the telephone fixing convex portion provided on the inner side surface of the concave portion of the telephone base (mobile unit storage portion provided in the fixing machine). In the latter case, an opening is provided on the surface facing the charging terminal in the mobile device storage part on the fixed machine, and the charging terminal on the fixed machine side is disposed in this opening part so that the mobile terminal can be moved in and out. When the battery is placed, the charging terminal protrudes from the opening and is conductively connected to the charging terminal.
[0005]
[Problems to be solved by the invention]
In the conventional general configuration of the cordless telephone, since the charging terminal of the master unit (fixed machine) is exposed on the pedestal, there is a risk of electric shock to the human body when there is an excessive input through the telephone line. In order to avoid this, the circuit network section and the charging terminal section are largely divided on the normal circuit board, and insulating parts such as a transformer, a photocoupler, a relay, and a capacitor are used for the connection.
[0006]
However, the addition of insulation parts increases the cost, and if a transformer is used for the insulation parts, call loss occurs, sound quality deteriorates, and impedance matching with the telephone line is difficult due to the impedance of the transformer. The sidetone characteristics that go around the handset cannot be improved.
[0007]
In addition, the method of providing an insulation switch between the charging circuit and the charging terminal inside the main unit charging terminal has a problem in terms of cost because of its complicated structure and a large number of parts, difficulty in manufacturing, and an increase in assembly man-hours. .
[0008]
Even if the structure in which the human body does not easily touch the charging terminal, such as Japanese Patent Application Laid-Open Nos. 4-200046 and 6-326644, the contact between the charging terminal and the human body cannot be completely eliminated. For example, in the case of the one described in Japanese Patent Laid-Open No. 6-326644, if the handset storage unit is pushed with one hand, the charging terminal is exposed, and thus the contact between the charging terminal and the human body cannot be completely prevented. In addition, the structure of the main unit becomes complicated, and problems such as increased costs and unstable strength when dropped are assumed.
[0009]
The present invention arranges the main unit charging terminal so as not to be exposed on the pedestal, prevents electric shock from the telephone line to the human body without using insulating parts, reduces the cost by simplifying the charging structure, and eliminates the transformer It is an object of the present invention to provide a charging terminal portion structure that can prevent the deterioration of sound quality due to the noise and improve the side sound characteristics.
[0010]
[Means for Solving the Problems]
The present invention comprises a mobile device having a rechargeable battery, and a fixed device having a built-in charging circuit connected to a telephone line for charging the battery, wherein the mobile device is attached to and detached from the fixed device. The mobile device and the fixing device each have a charging terminal that can contact each other, and the charging terminal of the fixing device is a part of a conductive coil spring, and the mobile device is elastically deformed by the coil spring. The charging terminals can be joined to each other by rotating at the time of insertion, and the charging terminals of the fixing machine are covered with a protective cover for insulation in which a part of the charging terminals is exposed, and the movement to the slits The charging terminal of the machine can be inserted. In the present invention, insulation parts such as transformers, photocouplers, relays, capacitors, etc. are eliminated, the main unit charging terminal connected to the telephone line is housed inside the protective cover, and the cost of the charging member is reduced by the structural simplification. Insulating function is ensured by making the charging terminal that is normally exposed not exposed metal, that is, the human body cannot directly touch the charging terminal.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is composed of a mobile device having a rechargeable battery and a fixed device having a built-in charging circuit connected to a telephone line for charging the battery, wherein the mobile device is attached to and detached from the fixed device. The mobile device and the fixed device each have a charging terminal that can contact each other, and the charging terminal of the fixed device is a part of a conductive coil spring, and when the mobile device is inserted due to elastic deformation of the coil spring. Rotates to allow charging terminals to be joined together. The charging terminal of the stationary machine is covered with an insulating protective cover that forms a slit that exposes a part of the charging terminal, and the charging terminal of the mobile device can be inserted into the slit. Because it is a communication device characterized by the fact that the charging terminal of the fixed machine can be made of non-exposed metal, it becomes unnecessary to divide the circuit board into the line network side and the charging terminal side Insulating parts such as transformers, relays, photocouplers and capacitors connected to them can be reduced, and the charging terminal structure can be simplified. Compared to charging terminals with insulating switches, charging parts such as resin molded products and sheet metal The number of points can be greatly reduced, and the cost can be greatly reduced. In addition, since an insulating circuit is not required, the circuit configuration of the board can be basically shared between the cordless telephone and the telephone with the cord, so that the circuit board design can be simplified and the number of developers and the period can be reduced. Further, since the area of the circuit board can be reduced by eliminating components, the circuit board can be reduced in cost and the product body can be downsized.
[0012]
Hereinafter, a cordless telephone as an example of the communication apparatus of the present invention will be described in detail with reference to the drawings.
[0013]
1 is a cross-sectional view of a main part showing a state in which a slave unit is inserted into a base unit of a cordless telephone for charging, FIG. 2 is a detailed view around a charging terminal, FIG. 3 is a front view of the base unit, and FIG. ) Is a front view of the slave unit, FIG. 4B is a right side view of the slave unit, FIG. 5 is a cross-sectional view of the main part showing the take-out property of the slave unit, and FIG. 6 is a cordless telephone according to the embodiment of the present invention. FIG. Note that FIG. 1 shows a cross-section of the master unit as viewed in the direction of arrows AA in FIG. 3 and the slave unit in the direction of arrows BB in FIG.
[0014]
In FIG. 1, reference numeral 1 denotes a cordless telephone handset, and 2 a charging terminal provided in the handset 1. The charging terminal 2 is connected to the circuit board of the slave unit 1 by screws. A connector for connecting to the battery is provided on the circuit board of the slave unit 1 and connected to a lead wire with a connector attached to the battery.
[0015]
Reference numeral 3 denotes a base unit of the cordless telephone, which has a built-in charging circuit 5 for charging a battery in the handset 1 in addition to a line network circuit 6 for connecting to a telephone line. Reference numeral 4 denotes a charging terminal provided in the parent device 3, which is formed as a part of a coil spring 4 a that elastically deforms and rotates when the child device 1 is inserted. The charging terminal 4 is connected to the parent device circuit board 14 via the parent device charging terminal connection lead wire 15. The subunit | mobile_unit 1 can be freely accommodated in the recessed part formed in the main | base station 3, ie, the stand part 16. FIG. In the circuit configuration diagram of FIG. 6, 8 is a power source, 9 is a transmitting circuit, 10 is a receiving circuit, and 11 is a telephone network.
[0016]
The base unit 3 is provided with a charging terminal 4 inside the pedestal 16, and the charging terminal 4 is covered with an insulating protective cover 13. The charging unit 4 is charged at the center of the insulating protective cover 13. A slit 17 that can only be connected to the terminal 2 is provided. Since the slit 17 provided in the insulating protective cover 13 is provided on the assumption that the human body, in particular, the fingertip does not directly contact the charging terminal 4, electric shock to the human body here is impossible.
[0017]
When the subunit | mobile_unit 1 is accommodated in the mounting base part 16, the charging terminal 2 of the subunit | mobile_unit 1 enters between the slits 17 of the protective cover 13 for insulation, contacts the charging terminal 4 of the main | base station 3, and starts charge. At this time, as shown in FIG. 1, the charging terminal 4 rotates in a direction to retract from the side surface of the child device 1 by deformation of the coil spring 4 a.
[0018]
In addition, the charging terminal 2 of the slave unit 1 has a structure that does not protrude from the basic surface of the slave unit cabinet in consideration of safety, and the protective cover 13 for insulation of the master unit 3 operates for taking out and storing the slave unit 1. In order not to hinder the performance, it rotates around the rotation fulcrum A, and is formed so as not to interfere with the child device 1 by moving into the placing table 16 when the child device 1 is taken out and stored.
[0019]
【The invention's effect】
In the present invention, since the charging terminal in the base unit is covered with an insulating protective cover so that the human body cannot be directly touched, the line network side and the charging terminal side, which were conventionally divided on the circuit board, are integrated. This makes it possible to design a circuit board regardless of whether it is a cordless phone or a corded phone. In addition, transformers, photocouplers, relays, capacitors, etc., which are insulation components used to connect the line network side and the charging terminal side, are no longer necessary, reducing costs and considering transformer impedance by eliminating transformers. This eliminates the need for such a design, facilitates matching with a telephone line, and prevents deterioration in sound quality. Further, it is possible to improve the side sound characteristics in which the call signal goes around the receiver.
[0020]
Moreover, the area of the circuit board can be reduced with the abolition of the insulating parts, and the cost can be reduced and the product can be downsized by reducing the structural parts related to charging.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part showing a state in which a slave unit is inserted into a cordless telephone base unit for charging. FIG. 2 is a detailed view around a charging terminal. FIG. 3 is a front view of the base unit. (A) Front view of handset (b) Right side view of handset [FIG. 5] Cross-sectional view of main part showing take-out property of handset [FIG. 6] FIG. 6 is a circuit configuration diagram of the cordless telephone according to the embodiment of the present invention. [Explanation of symbols]
1 Slave unit (mobile device)
2 Charging terminal 3 Master unit (fixed unit)
4 Charging terminal 4a Coil spring 5 Charging circuit 6 Line network circuit 8 Power supply 9 Transmission circuit 10 Reception circuit 11 Telephone line network 13 Insulation protective cover 14 Base unit circuit board 15 Base unit charging terminal connection lead 16 Stand base part 17 Slit

Claims (1)

A communication device comprising a mobile device having a rechargeable battery and a fixed device having a built-in charging circuit connected to a telephone line for charging the battery, wherein the mobile device is attached to and detached from the fixed device. The mobile unit and the fixed unit each have a charging terminal that can contact each other, and the charging terminal of the fixed unit is a part of a conductive coil spring and rotates when the mobile unit is inserted due to elastic deformation of the coil spring. The charging terminals can be joined to each other, and the charging terminal of the fixing device is covered with an insulating protective cover in which a slit exposing a part of the charging terminal is formed, and the insulating protective cover is attached to the fixing device. while maintaining the state of covering the charging terminal rotates with charging terminals of the fixed unit, is characterized in that the insertable charging terminals of the mobile station to the slit communication Location.

Images