JPH05174808A - Charging type electric device - Google Patents

Abstract

PURPOSE:To prevent heat and firing generation due to short-circuit in the case of taking out a battery for the purpose of collection. CONSTITUTION:A positive terminal 2 and a negative terminal 3 are projectively mounted on one end of a charging battery 1. A diode 4 for short-circuit prevention is mounted between at least one end of the terminals 2 and 3 and the charging battery 1 to form a charging battery block 5. The charging battery block 5 is removably stored from a bottom aperture in the main body of the device formed cylindrical and having the bottom end open. A battery cover is detachably secured to the bottom end aperture of the main body of the device. If the positive terminal 2 and the negative terminal 3 are made conductive by mutual contact in the case of taking out the charging battery block 5 from the main body of the device, the existence of the diode 4 can prevent the generation of a short-circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rechargeable electric device such as an electric shaver operated by a rechargeable battery.

[0002]

2. Description of the Related Art Electric appliances such as electric razors are mainly used with a rechargeable battery as a power source.
Since a rechargeable battery such as a Cd battery contains a harmful substance, it needs to be taken out from the device and collected. For this reason, for example, as disclosed in Japanese Utility Model Laid-Open No. 2-1865, a method has been proposed in which a wiring board is broken to collect a rechargeable battery.

However, in a device such as a female electric razor in which a device body is formed in a thin grip and a rechargeable battery is housed in the device body, a battery is provided at a lower end (rear end) of the device body. Since the cover is detachably attached and the battery cover is removed, the rechargeable battery can be taken out from the opening at the lower end of the device body, and the above method cannot be adopted. And in such an electric device, in order to charge the rechargeable battery housed in the device body, it is necessary to project the charging anode terminal and the cathode terminal from the lower end of the device body, and therefore one end of the rechargeable battery. It is necessary to project the anode terminal and the cathode terminal in close proximity to each other.

[0004]

However, when the anode terminal and the cathode terminal are provided so as to project at one end of the rechargeable battery as described above, the anode terminal and the cathode are taken out when the rechargeable battery is taken out from the device body and collected. The terminals are likely to be brought into contact with each other, and in this case, if the charge capacity remains in the rechargeable battery, a short circuit occurs and there is a risk of heat generation or ignition.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a rechargeable electric device capable of preventing a short circuit from occurring and heat generation or ignition when a rechargeable battery is taken out and collected. It is intended.

[0006]

In a rechargeable electric device according to the present invention, an anode terminal 2 and a cathode terminal 3 are provided so as to project from one end of a rechargeable battery 1 and at least one of the terminals 2 and 3 is provided.
A short circuit prevention diode 4 is attached between the rechargeable battery 1 and the rechargeable battery 1 to form a rechargeable battery block 5, and the rechargeable battery block 5 is housed in a tubular device body 6 having a lower end opened so that the rechargeable battery block 5 can be freely removed from the lower end opening. However, the battery cover 7 is detachably attached to the lower end opening of the device body 6.

[0007]

The positive electrode terminal 2 and the negative electrode terminal 3 are provided so as to project from one end of the rechargeable battery 1, and at least one of the terminals 2 and 3 is provided.
Since the short circuit prevention diode 4 is attached between the rechargeable battery 1 and the rechargeable battery 1, the rechargeable battery block 5 is formed.
Even when the anode terminal 2 and the cathode terminal 3 are brought into contact with each other when the rechargeable battery block 5 is taken out from the device body 6 for recovering the rechargeable battery 1, the presence of the diode 4 can prevent the occurrence of a short circuit. ..

[0008]

EXAMPLES The present invention will be described in detail below with reference to examples. The attached drawings show an example of using a female shaver as a rechargeable electric device. FIG. 3 shows the overall appearance of the electric razor, which includes a device body 6 formed in a grip shape by a cylindrical housing, a blade block 12 provided with a razor blade 11, and a battery cover 7. .. The blade block 12 is formed by holding the razor blade 11 by a pair of holders 13a and 13b, and by pressing the blade attachment / detachment button 13 to the upper end (tip) of the device body 6 via the blade mounting cover 14. It is designed to be detachable. A switch handle 16 for turning on / off a built-in motor 15 is attached to the device body 6.

FIG. 2 is a sectional view of the electric razor, in which the motor 15 is mounted in the upper part of the device body 6 by the motor mount 17. The output shaft 18 of the motor 15 has an M-shaped seal 19 and a drive shaft 20 attached thereto, and the drive shaft 20 is connected to a conversion mechanism 22 including a pinion and a rod in the blade block 12 by a joint 21. In this way, the rotary motion of the drive shaft 20 is converted into a linear reciprocating motion so that the razor blade 11 can be reciprocally driven. Reference numeral 23 is a motor base, 24 is a seal, and 25 is a cam interlocked with the operation of the switch handle 16.

5 and 6 are cross-sectional views of the device body 6, wherein the device body 6 is formed in a cylindrical shape having an opening at the lower end (rear end), and a screw 30a is provided on the outer periphery of the lower end. A battery cover seal 31 is attached at the upper position of the screw 30a. The motor mounting base 17 for mounting the motor 15 has a switch metal fitting 26, a switch contact 27 and a motor cathode metal fitting 28 attached, and a motor anode metal fitting 29 connected to the switch contact 27 is provided along the inner surface of the device body 6. It is provided so as to extend to the vicinity of the lower end opening. By operating the switch handle 16, the switch fitting 26 can be moved to connect and disconnect the switch contact 27.

FIG. 1 shows a rechargeable battery block 5 used in the present invention. The center of a cathode terminal plate 34 as shown in FIG. 4 is spot-welded and fixed to the cathode of a rechargeable battery (storage battery) 1. Yes, the energizing coil spring 3 is attached to the cathode terminal plate 34.
5 is attached. The energizing coil spring 35 is formed in a pyramid shape in which the tip has a small diameter and the base has a large diameter, as shown in FIG. 1 (d). By enclosing the base end of the energizing coil spring 35 in the gap a between the energizing coil spring 3 and the cathode,
5 is held. A projecting piece 36 is provided on one end of the cathode terminal plate 34, and a diode mounting hole 37a is formed on the projecting piece 36. Reference numeral 38 denotes a battery holder formed of an insulating material such as a resin molded product and having a substantially semicircular cross section, and end plate portions 39a and 39b are provided at both ends thereof. Reference numeral 40 is an anode fitting formed by bending it into a substantially L shape, and has a V-shaped pressure contact piece 41 at one end as shown in FIG.
In addition, the anode terminal press-fitting notch 43 is provided in the connecting piece 42 at the other end, and the locking claw 44 is bent. On the outer surface of one end plate piece 39a of the battery holder 38, as shown in FIG. 4, a pair of hooks 45 are provided to project and a concave step portion 46 is provided. By inserting the connecting piece 42 of the metal fitting 40 into the recessed step portion 46 inside the hook 45 and inserting and locking the locking claw 44 into the locking hole 48 provided on the outer surface of the battery holder 38, the connecting piece 42 is placed outside the battery holder 38. Anode fitting 40
Is attached. In this way, the anode fitting 40
When the is attached, the anode terminal press-fitting notch 43 is aligned with the inserting notch 47.

As described above, the cathode of the rechargeable battery 1 has the cathode terminal plate 34 and the energizing coil spring 35 attached thereto, and the anode of the rechargeable battery 1 has the anode terminal 2 welded thereto so as to project therefrom. .. This rechargeable battery 1 is shown in FIG.
The battery holder 38 is attached to the outside of the rechargeable battery 1 so as to be integrated with the battery holder 38 by being fitted into the battery holder 38 as indicated by the arrow. At this time, the anode terminal 2 of the rechargeable battery 1 is inserted into the insertion notch 47 and press-fitted into the anode terminal press-fitting notch 43 of the anode metal fitting 40 so that the anode terminal 2 is connected to the anode metal fitting 40. After attaching the battery holder 38 to the rechargeable battery 1 in this manner, the cathode metal fitting 51 is attached to the outside of the battery holder 38. The cathode fitting 51 is formed in an elongated shape as shown in FIG. 4, and has a diode mounting hole 37b at one end thereof and a cathode terminal press-fitting hole 52 at a bent piece 53 at the other end. A groove 54 is provided on the outer surface of the battery holder 38,
By fitting the cathode metal fitting 51 into the groove 54, the cathode metal fitting 51 is attached to the battery holder 38. When the cathode fitting 51 is thus attached to the battery holder 38, the cathode terminal press-fitting hole 52 is aligned with the seat hole 55 provided in the end plate portion 39a. Then, the cathode terminal 3 formed as a pin with the locking flange 56 is press-fitted into the seat hole 55 from the cathode terminal press-fitting hole 52 to be attached, whereby the cathode terminal 3 is projected in parallel with the anode terminal 2. Further, the lymph 57 and the anode terminal seal 58 are inserted and attached to the anode terminal 2, the cathode terminal seal 59 is inserted and attached to the cathode terminal 3, and the diode attachment hole 37a of the cathode terminal plate 34 is attached.
The diodes 4 are mounted between the cathode terminal plate 34 and the anode fitting 51 by soldering and attaching the terminals 4a and 4a of the diode 4 to the diode mounting holes 37b of the cathode fitting 51, respectively. The diode 4 is adapted to be housed in the groove portion 60 outside the end plate portion 39b of the battery holder 38. In this way, the rechargeable battery block 5 as shown in FIG. 1 can be assembled.
In the rechargeable battery block 5, the anode of the rechargeable battery 1 is directly connected to the anode terminal 2, and the cathode of the rechargeable battery 1 is connected to the cathode terminal 3 via the cathode terminal plate 34, the diode 4 and the cathode fitting 51. It is connected.

By inserting the rechargeable battery block 5 formed in this way from the opening at the lower end of the device body 6, the rechargeable battery block 5 is installed in the device so that the ends of the anode terminal 2 and the cathode terminal 3 protruding from the device body 6 protrude. When the rechargeable battery block 5 is housed in the device body 6, the energizing coil spring 35 is brought into pressure contact with the motor cathode metal fitting 28 to connect the cathode of the rechargeable battery 1 to the motor 15. The anode metal fitting 40 is pressed against the motor anode metal fitting 29 by the pressure contact piece 41, and the anode of the rechargeable battery 1 is connected to the motor 15 through the anode terminal 2, the anode metal fitting 40, the motor anode metal fitting 29, and the switch contact 27. When the rechargeable battery block 5 is housed in the device body 6, the positioning protrusion 63 of the battery holder 38 fits into the positioning recess 64 provided at the opening edge of the device body 6 shown in FIG. It can be positioned so that it does not rotate inside.

In this way, the rechargeable battery block 5 housed in the device main body 6 is provided with a battery base 65 at a lower portion protruding from the device main body 6.
Cover. The battery base 65 is formed as a bottomed cylinder as shown in FIG. 4, and a battery base seal 66 is attached to the outer periphery thereof, and the anode terminal 2 and the cathode terminal 3 are projected on the bottom portion 65a. Two through holes 76 are provided. By attaching the battery cover 7 so as to cover the battery base 65 and screwing the screw 30b on the inner periphery of the battery cover 7 into the screw 30a of the device body 6, the battery cover 7 opens at the lower end of the device body 1. So that the rechargeable battery block 5 is housed in the device body 1 so that the anode terminal 2 and the cathode terminal 3 of the rechargeable battery block 5 are exposed in the opening 67 formed in the bottom of the battery cover 7. I am doing it. Battery cover 7
Vent holes 68 are provided on the side surface of the
A filter 69 such as a "fluoropore" that allows air but not water to pass through the vent hole 68 is welded and closed, and a name plate 70 is stuck on the filter 69. Ventilation grooves 71 are provided around and around the portion where the filter 68 is attached, and the ventilation notches 7 are formed above and below the nameplate 70 in correspondence with the ventilation grooves 71.
2 is provided. The vent hole 68 is the seal 6 of the battery base 62.
A gas such as hydrogen gas generated when the rechargeable battery 1 is charged is released from the ventilation hole 68 through the filter 69 through the ventilation groove 71 and the ventilation cutout 72. By doing so, it is possible to prevent the gas from filling the inside of the device body 6.

The rechargeable electric device assembled as described above is used by charging the rechargeable battery 1 by connecting the anode terminal 2 and the cathode terminal 3 to a charging adapter. When connecting to the charging adapter, the portion of the battery cover 7 is fitted into the charging adapter to connect the anode terminal 2 and the cathode terminal 3, but the opening 67 on the lower surface of the battery cover 7 fits into the charging adapter. It is necessary to bring the anode terminal 2 and the cathode terminal 3 into contact with the charging terminal of the charging adapter in the combined state, and for this reason, the battery cover 7 must be attached to the device body 6 in the correct orientation. Therefore, as shown in FIG. 4, the bottom portion 6 of the battery base 65 is
5a is provided with a screw hole 73, a battery cover 7 is provided with a screw hole 74, and a screw 75 is screwed from the screw hole 74 to the screw hole 73.
By screwing in, the battery cover 7 can be attached and positioned.

When the rechargeable battery 1 has reached the end of its life and is to be taken out of the device body 6, the lower surface of the device body 6 is removed by first removing the screw 75 and then removing the battery cover 7 from the device body 6. Can be opened, and the electric base 65 can be removed to remove the rechargeable battery 1 together with the rechargeable battery block 5 from the rechargeable battery 1. In this way, when the rechargeable battery block 5 is taken out from the device body 6, even if the anode terminal 2 and the cathode terminal 3 are brought into contact with each other to form a closed circuit, a short circuit occurs due to the presence of the diode 4 in this circuit. Therefore, even if the rechargeable battery 1 has a charge capacity, there is no fear of heat generation or ignition. The diode 4 has the cathode terminal 3 and the rechargeable battery 1 as in the above embodiment.
The anode terminal 2 may be connected to the anode of the rechargeable battery 1 in addition to the connection to the cathode.

When the rechargeable electric device according to the present invention is used as an electric razor for women, the razor blade 11 of the blade block 12 serves as a grip as shown in FIG. 7 (a). It is preferable to incline at an angle of θ = 12.5 ° with respect to the direction. Inclining the razor blade 11 in this way makes it easier to use when someone other than yourself cuts down hair or the like. At this time, a gap δ is provided between the extension line of the blade edge of the razor blade 11 and the convex curved portion b of the holder 13 of the blade block 12 so that the blade edge of the razor blade 11 is convex curved portion b of the holder 13. It is preferable that the holder 13 be more protruding than the above. By doing so, it is possible to prevent the holder 13 from being a hindrance in terms of usability when shaving down hair etc. with the razor blade 11. Incidentally, if the cutting edge of the razor blade 11 does not project from the convex curved portion b of the holder 13 as shown in FIG.
When the razor blade 11 hits the skin, the blade edge of the razor blade 11 does not reach the skin and the blade edge is inclined and hits the skin, resulting in a narrow shaving width and poor usability.

[0018]

As described above, according to the present invention, an anode terminal and a cathode terminal are provided so as to project at one end of a rechargeable battery, and a short-circuit prevention diode is attached between at least one terminal and the rechargeable battery to charge the battery. Since the battery block is formed, the rechargeable battery block is housed in the device body formed in a tubular shape with the lower end openable from the lower end opening, and the battery cover is detachably attached to the lower end opening of the device body. Even if the anode terminal and the cathode terminal are brought into contact with each other when the rechargeable battery block is taken out from the device body in order to recover the rechargeable battery, the presence of the diode can prevent the occurrence of a short circuit. It is possible to prevent heat generation and ignition.

[Brief description of drawings]

1A and 1B show a rechargeable battery block used in the present invention, in which FIG. 1A is a front view, FIG. 1B is a plan view, FIG. 1C is a side view showing a broken battery holder, and FIG. It is sectional drawing of a cathode terminal plate part.

2A and 2B show an embodiment of the present invention, in which FIG. 2A is an overall sectional view and FIG. 2B is a sectional view with a blade block removed.

3A and 3B are external views of the same, wherein FIG. 3A is a front view, FIG. 3B is a side view, and FIG. 3C is a rear view.

FIG. 4 is an exploded perspective view of the above rechargeable battery block and battery cover.

FIG. 5 is a front cross-sectional view of the same device body.

FIG. 6 is a side sectional view of the same device body as above.

FIG. 7 is a view showing a blade block portion of the above,
(A), (b) is a front view, respectively.

[Explanation of symbols]

 1 Rechargeable battery 2 Anode terminal 3 Cathode terminal 4 Diode 5 Rechargeable battery block 6 Device body 7 Battery cover

Claims (1)

[Claims] 1. A rechargeable battery block is formed by providing a positive electrode terminal and a negative electrode terminal at one end of a rechargeable battery so as to project, and a short-circuit prevention diode is attached between at least one terminal and the rechargeable battery to form a rechargeable battery block. A rechargeable electric device, characterized in that a rechargeable battery block is housed in a device body formed in an open tubular shape so that it can be taken out from a lower end opening, and a battery cover is detachably attached to the lower end opening of the device body.