JPH10304581A - Charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress losses due to a liquid by making, in a main body lower case, a drainage hole for eliminating a liquid entering the main body lower case out of a main body case and forming a difference in level inside the case. SOLUTION: This charger has a primary circuit 6a and a secondary circuit 6b on a printed board 6, and a drainage hole 10 is formed in a bottom face of a main body lower case at the secondary circuit side. A difference in a level 11 is formed such that the primary circuit 6a side is higher than the secondary circuit 6b side. When a liquid 9 such as water enters a main body case through a pocket 3 of a main body upper case 1, it reaches a main body lower case 2 through the printed board 6 and is expanded over the entire body of the case beyond a wall 13 when it gathers. Owing to the existence of the difference in the level 11, however, there is hardly liquid flowing into the primary circuit 6a side which is directly connected to a power supply and, even if a little liquid happens to flow to the primary circuit 6a side, it immediately flows down to the secondary circuit 6b side. Then, when the liquid 9 reaches a slanted face 10a, it flows over the slanted face 10a and is discharged out of the main body lower case 3 through the drainage hole 10. Owing to this structure, the incidence of losses due to liquids can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger for charging a device to be charged such as a mobile phone.

[0002]

2. Description of the Related Art As an example of a conventional charger, a mobile phone charger will be described with reference to FIG. In the figure, the main body case is composed of an upper main body case 1 and a lower main body case 2, 3 is a pocket for mounting a mobile phone main body which is a device to be charged with a battery, and 4 is fixed to the main body upper case 1. A gap formed between the charging terminal block 5 having the charging terminal 5a, a printed circuit board 6, a circuit component 7 on the primary circuit side, 8 a lead leg of the circuit component 7, and a printed circuit board 6 And the main body lower case 2.

[0003] In this configuration, a portable telephone body having a battery mounted thereon is placed in a pocket 3 so that a charging terminal 5a is provided.
The charging is performed by the charger through.

[0004]

However, with the spread of portable devices such as mobile phones and charging devices using secondary batteries in recent years, liquids such as water have been introduced into the charger due to accidents or apologies. When the battery enters, the electric circuit is short-circuited, and the charger is damaged (hereinafter, the damage by the liquid is referred to as liquid loss).

[0005] In the battery charger for a portable telephone having the above-mentioned conventional configuration, when a liquid 9 such as water enters the pocket of the upper body case by mistake, the liquid 9 is discharged from the gap between the upper case and the charging terminal. And reaches the lower case located at the lower part of the printed circuit board from a gap between the printed circuit boards. The amount of the liquid 9 that has reached the lower case of the main body increases,
In addition, when the power of the charger is turned on, the liquid 9 comes into contact with the lead feet of the circuit components, and the electric circuit is short-circuited, and the charger may be damaged.

An object of the present invention is to solve such a conventional problem and to provide a charger capable of suppressing a liquid loss.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an upper case and a main body having a pocket for charging at least either a main body of a device to be charged having a battery or a single battery. In a charger having a main body case composed of a main body lower case engaged with an upper case, and a charging terminal serving as a charging contact when charging a device to be charged or a battery unit placed on the main body case, A drain hole for discharging the liquid that has entered the case to the outside of the main body case is provided in the lower body case, and a step is provided inside the lower body case with the drain hole side being downward. Further, a primary circuit is provided above a step provided inside the lower body case, or a waterproof wall is provided on the inner bottom surface of the lower body case so that at least the primary circuit side is protected. .

Accordingly, when the liquid enters the case from the pocket of the upper body case and reaches the inner bottom surface of the lower body case, the liquid hardly flows to the primary circuit due to the step of the inner bottom surface of the lower body case. Even if the liquid flows to the primary circuit side, the liquid flows to the secondary circuit side due to a step or a waterproof wall, and flows out of the case through the drain hole provided in the secondary circuit side, preventing liquid damage to the charger. It is possible,
In particular, almost no liquid flows to the primary circuit side, which is a power supply circuit that needs to be protected from liquid damage, so that the degree of failure can be reduced and safety can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In addition,
Components having substantially the same configuration as the conventional example shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the primary circuit 6a and the secondary circuit 6b are arranged on the printed circuit board 6.

(Embodiment 1) In FIG. 1, reference numeral 10 denotes a drain hole for discharging liquid such as water which has entered the charger to the outside of the charger. Is provided. Reference numeral 10a denotes an inclined surface provided around the drain hole, which enhances the water discharging effect. Reference numeral 11 denotes a step provided on the inner bottom surface of the main body lower case 2, and a step 1
Numeral 1 is provided so that the primary circuit 6a which is a power supply circuit is higher than the secondary circuit 6b which performs battery charge control and the like. And 12, when a small amount of liquid 9 leaks,
It is a wall that does not flow to the primary circuit 6a side.

In FIG. 1, when a liquid 9 such as water enters from the pocket 3 of the upper case 1, for example, the liquid 9 such as water
Reaches the lower case 2 via the printed circuit board 6. Thereafter, when the liquid 9 accumulates on the inner bottom surface of the main body lower case 2, the liquid 9 spreads over the wall 12 and spreads over the entire main body lower case 2. However, the provision of the step 11 makes it necessary to particularly prevent liquid loss. Hardly flows to the side of the primary circuit 6a directly connected to a power supply having a step, and even if a small amount flows, a step 11
Owing to the secondary circuit 6b.

When the liquid 9 reaches the inclined surface 10a,
The water smoothly flows on the inclined surface 10 a and is discharged out of the lower case 2 through the drain hole 10. At this time, if the charger is not used, water is discharged from the drain hole 10 so that liquid loss can be suppressed. By providing the steps 11 and the drain holes 10 in this manner, the occurrence rate of liquid loss can be reduced.

The drain hole 10, the slope 10a, and the step 1
Needless to say, the position where 1 is provided is not limited to the position shown in the figure.

(Embodiment 2) In FIG. 2, the upper case 1 to the wall 12 are substantially the same as those in Embodiment 1 shown in FIG. Reference numeral 13 denotes a waterproof wall for preventing water from entering the primary circuit 6a.

In FIG. 1, when a liquid 9 such as water enters from the pocket 3 of the upper case 1, for example, the liquid 9 such as water
Reaches the lower case 2 via the printed circuit board 6. Thereafter, when the liquid 9 accumulates on the inner bottom surface of the main body lower case 2, the liquid 9 climbs over the wall 12 and spreads over the entire main body lower case 2. However, the provision of the waterproof wall 13 prevents liquid loss in particular. Water does not flow to the primary circuit 6a side directly connected to the required power supply. In addition, the water gradually flows down to the secondary circuit 6b due to the step 11 provided gently.

When the liquid 9 reaches the inclined surface 10a,
The water smoothly flows on the inclined surface 10 a and is discharged out of the lower case 2 through the drain hole 10. At this time, if the charger is not used, water is discharged from the drain hole 10 so that liquid loss can be suppressed. By providing the steps 11 and the drain holes 10 in this manner, the occurrence rate of liquid loss can be reduced.

It is needless to say that the position where the waterproof wall 13 is provided is not limited to the position shown in the figure.

[0018]

As is apparent from the above embodiment, according to the present invention, the rate of liquid loss can be reduced by discharging liquid such as water that has entered the inside of the charger to the outside of the charger. In addition, since a step or a waterproof wall is provided so as to raise the primary circuit side particularly required to prevent liquid loss, the degree of failure at the time of liquid loss can be reduced and safety can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view showing a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body upper case 2 Main body lower case 3 Pocket 5a Charging terminal 6 Printed circuit board 6a Primary circuit 6b Secondary circuit 9 Liquid 10 Drain hole 11 Step 13 Waterproof wall

Claims (4)

[Claims] 1. A main body comprising: a main body upper case provided with a pocket for charging by placing at least one of a device to be charged having a battery mounted thereon and a battery alone; and a lower case being engaged with the main body upper case. A case, a charging terminal serving as a charging contact when charging a device to be charged or a battery unit placed on the main body case, and a primary circuit and a secondary circuit, and a step is provided on an inner bottom surface of the lower case of the main body. A charger characterized by having been done. 2. The charger according to claim 1, wherein the step is provided so that the primary circuit side is higher than the secondary circuit side. 3. A drain hole for discharging a liquid that has entered the lower body case to the outside of the main body case is provided in the lower body case, and a step in which the drain hole side is lower is formed inside the lower body case. 2. The device according to claim 1, wherein
Charger as described. 4. A main body comprising a main body upper case provided with a pocket for charging at least one of a device to be charged having a battery mounted thereon and a battery alone, and a lower body case engaged with the main body upper case. A case, a charging terminal serving as a charging contact when charging a device to be charged or a battery unit placed on the main body case, and a primary circuit and a secondary circuit, wherein a waterproof wall is provided on an inner bottom surface of the lower case of the main body. A charger characterized by being provided.