JP2560078B2 - DC connection box - Google Patents

Description

Description: TECHNICAL FIELD The present invention makes it possible to use a cordless device body using a battery pack containing a secondary battery with a commercial power source, and to connect it to an AC adapter for charging the battery pack. DC connection box.

2. Description of the Related Art In recent years, cordless equipment has expanded into new fields of use
It has become popular rapidly due to its light weight. Accompanying this, the use of AC adapters to charge these battery packs is increasing as well as to operate these devices from commercial power sources.

 The conventional AC adapter will be described below.

FIG. 6 shows an example of using a conventional AC adapter connected to a video camera. Reference numeral 1 is an AC adapter, 2 is a video camera, and 3 is a DC cable for connecting the AC adapter and the video camera.
By connecting with a DC cable, the video camera can be used with commercial power. Reference numeral 4 denotes a DC power input terminal of the video camera. 5 is a battery pack, this 6th
In the figure, it is attached to the grip of the video camera. The battery pack 5 is required when using the video camera 2 in a cordless state.

FIG. 7 shows a state in which the battery pack 5 is being charged by a commercial power source. The battery pack 5 is charged by sliding the battery pack 5 on the AC adapter 1 in the direction of the arrow and connecting them to each other. Give.

FIG. 8 shows an example in which the battery pack 5 is attached to the rear part of the video camera. In this example, the DC power input terminal 4 shown in FIG. 6 is not attached. FIG. 9 shows a connection method with the AC adapter 1 when the video camera shown in FIG. 8 is used with a commercial power source. The DC cable 6 in the figure is a DC connection box 7 having the same connection structure as the battery pack 5 in FIG. 8 on the video camera 2 side. Further, FIG. 10 shows a case where the battery pack 5 is being charged by the AC adapter 1.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional configuration, it is necessary to provide a DC input terminal for using a cordless device such as a video camera, which is required to be small and lightweight, with a commercial power source. In addition, a device that does not have a DC input terminal requires not only a DC cable to which a DC connection box 7 having contacts having the same connection structure as the battery pack is attached,
When charging the battery pack with a commercial power source, it is necessary to have a structure to connect the battery pack by sliding it to the AC adapter, which is one of the reasons for preventing the miniaturization of the AC adapter.

An object of the present invention is to reduce the size and weight of a power supply system configuration of a cordless device using a secondary battery.

Means for Solving the Problems The present invention is a DC connection box provided with a DC connection terminal having the same shape as a battery pack incorporating a secondary battery, and a charge control detection circuit in the DC connection box,
Use the cordless device with commercial power and charge the battery pack by incorporating the connection terminal with the battery pack and connecting it with the AC adapter consisting only of the power supply circuit section and the DC cable derived from this DC connection box. Is to do.

Operation According to this configuration, the AC adapter does not need a power supply circuit section for charging the battery pack to operate the cordless device from the commercial power supply, and at the same time, a slide section for connecting the battery pack is not required, which is small in size,
Weight reduction is possible.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 shows the connection when the video camera 2 is used by using an AC adapter with a commercial power source as in the conventional example.
A state in which a DC connection box 9 having a built-in charging control detection circuit section is attached to the video camera 2 is shown.

FIG. 2 shows a state in which the DC connection box 9 is removed from the video camera 2 and the battery pack 5 is slid around the connection terminals to be connected. Also, this DC cable 8 is the same as the AC adapter 10 shown in Figs.
Connected to DC output terminal 12.

It should be noted that Fig. 3 shows an adapter with a direct plug-in structure in which the AC plug 11 is attached to the AC adapter 10 having only the power supply section, and Fig. 4 shows the AC mainly used in the AC200V region.
1 shows an AC adapter 10 to which a cord 13 with a plug is attached.

FIG. 11 is a block diagram of a conventional AC adapter in which the power supply circuit unit 14 and the charge control detection circuit unit 15 are incorporated in one case.

In the AC adapter 10 of the present invention shown in FIGS. 5A and 5B, only the power circuit section 14 is incorporated in the adapter, and the DC connection box 9
The charge control detection circuit unit 15 is incorporated in the inside and the two are connected by the DC cable 8.

Although a video camera has been described as an example of the cordless device in the above embodiment, the device is not limited to this, and the same applies to a handy transceiver, a portable TV, or the like.

EFFECTS OF THE INVENTION By thus providing the charge control detection circuit section of the battery pack in the DC connection box, the AC adapter is limited to the power supply circuit section, which enables downsizing and weight reduction as well as overseas specifications. An adapted power supply system can be easily constructed. On the other hand, since it is not necessary to provide a DC power supply input terminal on the side of a cordless device such as a video camera, that space is not required, and space saving and downsizing can be achieved.

[Brief description of drawings]

FIG. 1 is a configuration diagram in which a DC connection box of the AC adapter of the present invention is connected to a video camera, FIG. 2 is a configuration diagram in which a battery pack is attached to the DC connection box, and FIG. 3 is a direct plug-in type of the present invention. Fig. 4 is an external view of an AC adapter with an AC cord, Figs. 5A and 5B are circuit block diagrams of the AC adapter of the present invention, and Fig. 6 is a conventional AC adapter for a video camera. Connected configuration diagram, FIG. 7 is a configuration diagram in which the battery pack is charged by the AC adapter, FIG. 8 is a configuration diagram of the video camera with the battery pack attached, and FIG. 9 is a conventional configuration in which the video camera is connected to the AC adapter. FIG. 10 is a configuration diagram in which the battery pack is being charged, and FIG. 11 is a circuit block diagram of the AC adapter. 1 ... Conventional AC adapter, 2 ... Video camera (cordless device body), 3 ... DC cable, 4 ... DC power input terminal, 5 ... Battery pack, 7 ... Conventional DC power connection box, 9 ...... DC connection box of the present invention, 10 ……
AC adapter.

Claims (1)

(57) [Claims] 1. A DC connection box detachably connected to a cordless device body and having a DC connection terminal of the same shape as a battery pack incorporating a secondary battery to be attached to the cordless device body. A DC connection box that includes a charge control detection circuit and a connection terminal for the battery pack in the DC connection box, and is connected to an AC adapter having only a power circuit section via a DC cable.