JPH07320705A - Rechargeable small electric device - Google Patents

Abstract

PURPOSE:To improve safety without output to the load side if a battery charger is erroneously charged on the equipment side after removed by forming part of a charging commercial AC power circuit in a separatable manner. CONSTITUTION:A wiring board 4 on which circuit pattern 8 is formed and a battery supporting plate 5 on which a battery charger 12 is mounted are molded in one unit and a folding line 7 is formed with small holes and grooves provided in the connection. Part 8a of the charging AC 100V line of the pattern 8 is formed on the supporting plate 5. When the battery charger 12 is removed, the pickup portion 5a protruded from one side edge E of the board 4 is picked up by hand and the supporting plate 5 is bent to the left upward direction, so that the board 4 is folded along the folding line 7 and the pattern 8 is cut off at A and B positions. In this way, the battery charger 12 is removed from the borad 4, at the same time the AC 100V line of the pattern 8 is cut off at C and D positions and then the part 8a is taken off. With charge after the battery charger is removed, no output occurs on the load side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small electric device having a built-in rechargeable battery, and takes measures to recover the rechargeable battery.

[0002]

2. Description of the Related Art In recent years, rechargeable batteries can be used repeatedly as a power source for small electric devices such as electric razors as compared to dry batteries, but rechargeable batteries such as Ni-Cd batteries are used as cadmium. Because it uses harmful substances,
It is not preferable to dispose of the entire device anywhere to prevent pollution. Therefore, it is necessary to recover the rechargeable battery from the inside of the device when disposing of it.

[0003]

However, when recovering the rechargeable battery, if only the rechargeable battery is removed on the device side and the commercial AC power supply circuit for charging is not separated, it remains charged. If the device was accidentally charged after the battery was removed, it would be output to the load side, causing a dangerous accident.

An object of the present invention is to eliminate the above-mentioned conventional problems and to take safety measures on the device side after the rechargeable battery is removed.

[0005]

According to the present invention, a main body case 1 is provided.
In a rechargeable small electric device having a rechargeable battery 12 and a commercial AC power supply circuit for charging built therein, a part of the commercial AC power supply circuit is separable. Is.

[0006]

When the rechargeable battery is removed from the device, if a separable part of the commercial AC power supply circuit for charging is separated, even if the device is erroneously charged after removing the rechargeable battery, the load It is safe because it is not output to the side.

[0007]

【Example】

(First Embodiment) An embodiment in which the present invention is applied to a rechargeable electric shaver will be described with reference to FIGS. In FIG. 2, a rectangular tubular body case 1 of this electric razor
The front and rear cases 1a and 1b of the half-divided type are abutted against each other and integrally coupled with each other by screws or the like, and a razor blade unit 2 is provided on an upper portion thereof, and a power feeding pin 3 for charging is provided on a bottom portion thereof. A razor blade driving motor M, a wiring board 4 and the like are housed and arranged inside the main body case 1.

A battery support plate 5 is integrally formed on the wiring board 4, and a connecting line between the battery support plate 5 and the wiring board 4 is weakened by processing a large number of small holes 6 or grooves so that a perforation line 7 is formed. Is formed. Further, the battery support plate 5 is formed with a grip portion 5a for easily gripping the battery support plate 5 so as to project from one side edge E of the wiring board 4. A pattern 8 corresponding to the circuit shown in FIG. 4 is formed on the wiring board 4, and a transformer 9, a diode 10, a resistor 11, etc. are mounted. Then, in the pattern 8, AC10
A part 8a of the 0V line (commercial AC power supply circuit for charging) is formed on the battery support plate 5, and the battery support plate 5
The rechargeable battery 12 is mounted on the. In the rechargeable battery 12, the negative and positive terminals 13 and 14 are connected and fixed to the lead pieces 15 and 16 on the battery support plate 5 by soldering or the like.

A rechargeable battery outlet 17 is opened in the main body case 1 over two sides of the one side surface of the case 1 and a front surface or a rear surface intersecting with the side surface, and the opening / closing lid 1 is attached to the outlet opening 17.
8 is detachably provided. At least the rechargeable battery 12 on the wiring board 4 is arranged so as to face the rechargeable battery outlet 17.

To take out the rechargeable battery 12 from this device, the open / close lid 18 is removed to open the rechargeable battery outlet 17, and the grip portion 5a is directly held by hand to apply a bending force to the battery support plate 5 as shown in FIG. By adding in the direction of the arrow F, the battery supporting plate 5 can be broken from the wiring board 4 along the break line 7. By this breaking, the charging lines A and B (see FIGS. 1 and 4) of the pattern 8 are cut, and the rechargeable battery 12 can be removed from the wiring board 4 together with the battery supporting plate 5, and at the same time, the AC 100 V of the pattern 8 can be removed. It is possible to remove a part 8a of the line by cutting the C and D portions of the line (see FIGS. 1 and 4). Therefore, the rechargeable battery 12 is taken out from the rechargeable battery outlet 17 and provided for collection, and even if the device is erroneously charged after the taking out, the rechargeable battery 12 is not output to the motor M side.

(Second Embodiment) FIGS. 5 to 7 show a second embodiment of the present invention. In this embodiment, the main body case 1 is made up of a front half case 1a and a rear half case 1b, which are halved, but are joined together by screws 19. A rechargeable battery outlet 17 is opened in the main body case 1 over the front surface, one side surface and a rear surface of the case 1, and an open / close lid 18 having a U-shaped cross section is detachably attached to the rechargeable battery outlet 17. . The wiring board 4 accommodated and arranged inside the main body case 1 is formed by connecting the battery support plate 5 via the break line 7 in the same manner as the wiring board 4 in the first embodiment. , Only the battery support plate 5 is the rechargeable battery outlet 1.
It is stored and arranged so as to face 7. The inside of the main body case 1 has partition walls 20a and 20b protruding from the front and rear cases 1a and 1b.
But the transformer 9 on the wiring board 4
And the like are partitioned into a high voltage chamber 21 of AC 100 to 240 V and a rechargeable battery outlet 17. The partition wall 20a-2
0b has a plurality of tooth pieces 25, and the tooth pieces 25 are thin long holes 3 provided between the holes 6 on the break line 7 of the wiring board 4.
Inserted in 5. The screws 19 for connecting the front and rear cases 1a and 1b are screwed into bosses 22a and 22b provided at positions as close as possible to the partition walls 20a and 20b.

The rechargeable battery 12 is mounted on the battery supporting plate 5 as in the case of the first embodiment, and its terminals 13 and 14 are connected and fixed to the lead pieces 15 and 16 on the battery supporting plate 5 by soldering or the like. AC1 of the pattern 8 on the wiring board 4
A part 8a of the 00V line is formed on the battery support plate 5.

As shown in FIG. 6, the battery support plate 5 is provided on the inner surface of the opening / closing lid 18 when it is attached to the rechargeable battery outlet 17.
A groove 23 that fits into the edge of is formed, and the free end side of the battery support plate 5 is supported by fitting into the groove 23.
Further, the opening / closing lid 18 is provided with a window 24, through which it is possible to confirm whether or not the rechargeable battery 12 is incorporated.

In the case of such a configuration, the opening / closing lid 18
7, the battery support plate 5 and the rechargeable battery 12 are held by hand as shown in FIG. 7, and the support plate 5 is broken along the fold line 7, so that the rechargeable battery 12 can be taken out at the same time.
The part 8a of the pattern 8 can be removed. At this time, the part of the break line 7 of the wiring board 4 is the partition walls 20a and 20b.
The battery support plate 5 is easy to break because it is pressed between the butts. At this time, the partition walls 20a and 20b
Can be sufficiently opposed to the bending force of the battery supporting plate 5 without being separated by the tightening force of the screw 19 arranged in close proximity thereto. Further, since the rechargeable battery outlet 17 is separated from the high voltage chamber 21 by the partition walls 20a and 20b, it is safe without accidentally treating an accident such as electric shock.

(Third Embodiment) FIG. 8 shows a third embodiment of the present invention. In this embodiment, as the rechargeable battery 12, a prismatic battery having negative electrode terminals 13 and 14 arranged side by side only on one end side thereof is used. It is mounted on the battery support plate 5 that is detachably connected, and the lead pieces 15 and 16 on the battery support plate 5 and the cathode and anode terminals 13 and 14 are connected and fixed by soldering or the like. Then, a part 8a of the AC line of the pattern 8 formed on the wiring board 4 is formed on the battery support plate 5. In this case, a distance d is placed between the AC line of the pattern 8 and the charging line, and both lines are formed. The purpose is to allow as much space as possible.

(Fourth Embodiment) FIGS. 9 and 10 show a fourth embodiment of the present invention. In this embodiment, the battery support plate 5 is used.
Is formed separately from the wiring board 4. The battery support plate 5
The rechargeable battery 12 is fixed by connecting the negative and positive terminals 13 and 14 to the lead pieces 15 and 16 protruding from the battery support plate 5 by soldering or the like on the surface of the battery. Further, on the back surface side of the battery support plate 5, pins 26 and 27 connected to the lead pieces 15 and 16 are provided.
And a part 8a of the pattern 8 of the input circuit formed on the wiring board 4 side is formed on the battery support plate 5 and the pins 28 and 29 connected to the part 8a are the pins 26・ It is projected between 27 and next to it. On the other hand,
The wiring board 4 is provided with four jacks 30, 31, 32, and 33 into which the pins 26, 27, 28, and 29 are inserted so that they can be pulled out with a fitting force that does not increase the contact resistance.

Thus, the battery support plate 5 has four pins 26.
・ 27 ・ 28 ・ 29 to Jack 30,31,32,33
Mounted on the wiring board 4 by inserting
When removing the rechargeable battery 12 and removing the part 8a of the pattern 8, as shown in FIG. 10, hold the rechargeable battery 12 and the battery support plate 5 by hand and set the four pins 26, 27, 28.
Just pull out 29 from jacks 30, 31, 32 and 33. In this case, at the time of removing the battery support plate 5, the pins 28 and 29 are located at the center position in the width direction of the battery support plate 5 so that the finger holding the support plate 5 does not touch the pins 28 and 29 on the input circuit side. It is preferable to install the rechargeable battery 12
An insulating sheet 34 having elasticity is preferably interposed between the overlapping surfaces of the battery supporting plate 5 and the battery supporting plate 5.

(Fifth Embodiment) FIG. 11 shows a fifth embodiment of the present invention. In this embodiment, a part of the pattern 8a
A lead wire type one connected to the wiring board 4 side is used as this, and this is locked to a part of the battery support plate 5 side, for example, around the rechargeable battery 12. In this case, the connection points C and D of the part 8a of the pattern are directly disconnected and cut, or a weak body part 8b such as a perforation for cutting is provided in the middle part of the part 8a of the pattern and cut from this part. To configure. Of course, the part 8a of the pattern itself may be a foil-like weak body.

(Other Embodiments) When the rechargeable battery 12 is taken out from the equipment, the front case 1a and the rear case 1b of the main body case 1 are separated so that the rechargeable battery 12 is wired as in the above-mentioned embodiments. It can also be removed from the substrate 4. In this case, especially the rechargeable battery outlet 17 and the opening / closing lid 1
It is not necessary to provide 8. Further, the present invention can be similarly applied to the case where two or more rechargeable batteries 12 are mounted on the battery support plate 5.

[0020]

Since the rechargeable small-sized electric device of the present invention is configured such that a part of the commercial AC power supply circuit for charging can be separated, when the rechargeable battery 12 is removed, a part of the circuit is separated. As a result, even if the rechargeable battery 12 is erroneously charged after being taken out, the rechargeable battery 12 is not output to the load side, an accident can be prevented, and safety is excellent.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of a wiring board according to a first embodiment.

FIG. 2 is a perspective view showing the electric shaver of the first embodiment with an opening / closing lid removed.

FIG. 3 is a cross-sectional view showing a state where a battery supporting plate of the electric shaver of the first embodiment is broken.

FIG. 4 is an electric circuit diagram of the first embodiment.

FIG. 5 is a perspective view showing the electric shaver of the second embodiment with the opening / closing lid removed.

FIG. 6 is a cross-sectional view of the electric shaver shown with the opening / closing lid of the second embodiment attached.

FIG. 7 is a cross-sectional view of the electric shaver shown with the opening / closing lid of the second embodiment removed.

FIG. 8 is a plan view of a part of the wiring board of the third embodiment.

FIG. 9 is a perspective view showing a state in which a battery support plate and a wiring board of the fourth embodiment are separated.

FIG. 10 is a side view showing the battery support plate and the wiring board of the fourth embodiment in a separated state.

FIG. 11 is a perspective view of a part of the wiring board of the fifth embodiment.

[Explanation of symbols]

 1 main body case 4 wiring board 5 battery support plate 8 pattern (commercial AC power supply circuit for charging) 8a part of pattern 12 rechargeable battery

Claims (1)

[Claims] 1. A rechargeable small-sized electric device in which a rechargeable battery 12 and a commercial AC power supply circuit for charging are built in a main body case 1, wherein a part of the commercial AC power supply circuit is separable. Small rechargeable electric device characterized by being provided.