JPS62123666A - Charge-type electric appliance - Google Patents

Abstract

PURPOSE:To prevent connecting terminals (charging terminals) from short- circuiting by water, by installing a plural number of charging terminals which are respectively connected with connecting terminals arranged on a bottom surface of an appliance and besides forming a recessed part on a contact plane to the bottom surface of the appliance. CONSTITUTION:A space, which attains to a lower plane in a charger 2, serving as a recessed part 26, is a part in which both projecting parts 24 and 24 in the recessed position 22 and the part supporting them are excluded. In the recessed part 26 traversing across both projecting parts 24 and 24, a whole length L in the direction of traversing across both projecting parts 24 and 24 is set larger than a whole length L' of a contact plane to the bottom surface of the recessed position 22 in case the recessed part 26 does not exist on the bottom surface of the appliance 1. And, a contact part of the bottom surface of the appliance 1 to the charger 2, when the appliance 1 being connected to the charger 2, is divided by the recessed part 26.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a rechargeable electric device comprising a device incorporating a storage battery and a charger for charging the device.

[Background technology] Devices that are used with water, such as electric tooth brushes, and devices that have appeared in recent years, such as waterproof electric razors, are rechargeable and can be connected to a charger to charge the built-in storage battery. In the case of a device that is equipped with
Although it is designed to prevent water from touching the connection terminals, it is not designed to prevent water from adhering to the bottom of the device, so charging with water attached to the bottom of the device is not possible. When the device is connected, water adhering to the bottom of the device spreads along the slight gap between the bottom of the device and the charger, and due to capillary action, the water flows between a pair of connection terminals (charging terminals) of the device. This has caused a problem in that the connection terminals and the charging terminals are corroded due to electrolysis due to short circuit between them.

[Objective of the Invention 1 The present invention has been made in view of the above points, and its purpose is to prevent water adhering to the bottom of the device from causing short circuit accidents and corroding the connecting terminals and charging terminals. There are no rechargeable electrical devices provided.

[Disclosure of the Invention] The present invention provides, in a rechargeable electrical device consisting of a device with a built-in storage battery and a charger, a plurality of charging terminals connected to connection terminals provided on the bottom of the device, respectively, connected to the charger. It is characterized in that a recess is provided on the contact surface of the charger with the bottom surface of the device, and the recess crosses between the charging terminals and has a total length longer than the total length of the contact portion with the charger on the bottom surface of the device. This prevents water adhering to the bottom of the device from spreading and being divided by the recesses, causing a short circuit between the connection terminals (charging terminals).

The present invention will be described below in detail based on the illustrated embodiment. A cylindrical device 1, such as an electric toothpaste, which includes a built-in motor 11 and a storage battery 12, has two recesses io and io on its bottom surface, and each A pair of connecting terminals 15.15 protruding into the recess 10.10
It is equipped with On the other hand, the charger 2, which includes a step-down transformer 20, a rectifying diode 21, etc., has a recess 22 on its upper surface into which the lower part of the device 1 is fitted, and a recess 22 that is connected upwardly within this recess 22. It is equipped with a pair of protrusions 24, 24 that protrude, and a hole into which the connection terminals 2, 2 of the device 1 are inserted is formed on the upper end surface, and when connected to the device 1, it is inserted into the recess 10 of the device 1. In the fitting side protrusions 24, 24, charging terminals 25, 25 are provided which come into contact with the connecting terminals 15, 15, respectively.

In the charger 2 here, the space in the recess 22 excluding the side protrusions 24, 24 and the portion supporting them is a recess 26 that reaches the lower surface of the charger 2. This recess 26, which exists across the side protrusions 24, 24, has a total length in the direction transverse between the side protrusions 24, 24, which is the same as the bottom of the recess 22 in the case where there is no recess 26 on the bottom surface of the device 1. The contact area between the bottom of the device 1 and the charger 2 is separated by the presence of the recess 26 when the device 1 is connected to the charger 2. It's becoming like this.

However, in order to charge the storage battery 12 of the device 1, when inserting it into the recess 22 of the charger 2 and connecting the connecting terminal 15. Even if the device 1 and the charger 2 are connected to each other, the contact between the device 1 and the charger 2 is only around the protrusions 24, 24 containing the charging terminals 25, 25, and the side protrusions 24, 24 are separated by the recess 26. Because they are not connected as a surface, even if water spreads along the contact area between the device 1 and the charger 2, each protrusion 2
4. The water around 24 will not connect with each other, and therefore will not cause a short circuit accident.Moreover, since the recess 26 here opens on the bottom surface of the charger 2, there will be no water in the recess 26. The water that has entered is discharged to the bottom of the charger 2.

Other embodiments are shown in FIGS. 6 and 7. Here, the recess 26 in the charger 2 is formed as a groove that crosses between the side protrusions 24, 24. Further, its total length is longer than the total length of the contact portion with the charger 2 on the bottom of the device 1. Therefore,
In the case of this embodiment as well, even if the device 1 is charged with water attached to its bottom surface, the concave portion 26 can prevent a short circuit caused by water.

[Effects of the Invention] As described above, in the present invention, even when charging is performed with water attached to the bottom surface where the connection terminal is provided, the recess provided in the charger does not connect with the water device. The connection terminal (charging terminal) is prevented from spreading along the contact surface with the device.
This prevents short circuits due to open water, and therefore there is no corrosion caused by electrolysis of the connecting terminals and charging terminals, resulting in a long life.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, Fig. 2 is a transverse cross-sectional view of the same, Fig. 3 is a perspective view of the same, and Fig. 4 (a) and (b) are plan views of the charger of the same. and a bottom view, FIG. 5 is a circuit diagram of the same as above, FIG. 6 is a perspective view of another embodiment, and FIG. 7 is a plan view of the same charger as above, in which 1 is a pusher, 15 is a connection terminal, 2 is a charger, 22 is a recess, 24 is a protrusion, 25 is a charging terminal, 2
6 indicates a recess.

Claims (2)

[Claims] (1) A rechargeable electrical device consisting of a device with a built-in storage battery and a charger. 1. A rechargeable electrical device, characterized in that a recess that crosses between the terminals and has a longer overall length than the entire length of the contact portion with the charger on the bottom of the device is provided on a contact surface with the bottom of the device. (2) The rechargeable electric device according to claim 1, wherein the recessed portion communicates with the outside of the charger at its lower side.