JPS5948111B2 - rechargeable electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rechargeable electric appliance such as a rechargeable electric shaver or a rechargeable flashlight.

BACKGROUND ART Rechargeable electric shavers have been proposed in which a dustproof or waterproof lid is provided in a plug insertion recess for charging or use with a commercial power source.

However, if the plug is used with the lid incompletely closed, dust such as beard debris and water may enter the plug insertion recess, causing a malfunction.

Particularly when washing with water, the problem of failure due to water intrusion becomes serious.

Also, even when charging with a plug inserted or using a commercial power source, if the plug is not inserted completely, dust or water may enter between the plug and the inner surface of the plug insertion recess, causing malfunction. There is a problem.

Therefore, the object of the present invention is to prevent the operation from occurring if the lid is closed or the plug is not fully inserted, and if the lid is used with the lid not fully closed or the plug is not fully inserted, it may cause malfunction due to ingress of dust or water. Our goal is to provide problem-free rechargeable electrical equipment.

An embodiment of this invention is shown in FIGS. 4 to 13.

In FIG. 4, reference numeral 5 denotes a case, in which a storage battery 6 and a charger 7 are housed in the body, and a motor 8 is housed in the head.

A fixed blade 10 with a convex curved surface is attached to the head of the case 5 via a blade mount 9 as shown in FIG. Motor shaft 8
It is attached to a.

The motor shaft 8a passes through the cylindrical portion 9a of the blade mount 9,
A watertight backing 11 that is in close contact with the motor shaft 8a is attached to the inner surface of the cylindrical portion 7a.

As shown in FIG. 4, a lower cover 12 separate from the cylindrical portion 5a of the case 5 is provided at the bottom of the case 5.
A plug insertion recess 13 serving as a plug receptacle is formed in the.

The lower cover 12 is fixed to the cylindrical portion 5a of the case 5 with screws.

The inner surface of the outer peripheral part of the lower cover 12 and the cylindrical part 5a of the case 5
An 01J ring 14 is interposed between the two.

The plug insertion recess 13 is into which a plug 15 (FIG. 9) is inserted, and two plug receiving pins 17 that come into contact with contact pieces 16 of the plug 15 are protruded inside.

The plug 15 is attached to a cord 38 of an adapter 37 (FIG. 10) that performs rectification and voltage transformation from an AC commercial power source.

An annular protrusion 15a is provided on the outer periphery of the plug 15, and an O-ring 18b that closely fits around the opening of the plug insertion recess 13 is provided on the annular protrusion 15a.

In FIG. 8, reference numeral 19 denotes a lid body that opens and closes the plug insertion recess 13, and is attached to the lower cover 12 so as to be rotatable around the pivot pin 20.

The lid body 19 has a locking protrusion 19a at its free end, and a lid locking button 21 that engages with the locking protrusion 19a is integrally formed with the lower cover 12 via its own elastic leg portion. .

Further, an 01J ring 18a is attached to the lid body 19 in close contact with the periphery of the opening of the plug insertion recess 13.

The tip of a movable pin 23 that slidably penetrates the lower cover 12 protrudes inside the four plug insertion parts 13, and a plug receiving switch 26 is closed when the movable pin 23 is pushed in.
is provided inside the case 5.

The plug receiving switch 26 has two unit switches 26a and 26b arranged in parallel as shown in FIG.

These unit switches 26a and 26b each have a movable contact piece 24 and a fixed contact piece 25.

Movable contact piece 24.24 of surface unit switch 26a, 26b
are connected to each other by an insulating member 24', and the movable pin 2
3, both movable contact pieces 24.24 simultaneously contact the corresponding fixed contact pieces 25.25.

As shown in FIG. 9, the plug 15 is provided with a recess 15b into which the tip of the movable pin 23 is inserted and comes into contact.

The recess 15b is formed to a depth such that the movable contact piece 24 of the plug receiving switch 26 contacts the fixed contact piece 25 when the plug 15 is properly inserted into the plug insertion recess 13.

Further, the tip of the movable pin 23 can come into contact with the inner surface of the lid body 19, and the movable contact piece 24 of the plug receiving switch 26 can come into contact with the fixed contact piece 25 when the lid body 19 is properly closed. be.

FIG. 12 shows the circuit of the charger 7 and motor 8 provided inside the case 5.

27a and 27b are terminals connected to the plug receiving pin 17 shown in FIG. 4, respectively.

The motor 8 is provided in parallel with the storage battery 6, and the motor 8
can be driven by switching between direct power supply from the adapter 37 connected to the terminals 27a and 27b and power supply from the storage battery 6.

Each unit switch 26a of the plug receiving switch 26.

26b is the main body functional circuit, that is, the drive circuit 2 of the motor 8.
8 and the charging circuit 29, respectively, and an operation switch 30 that opens and closes the drive circuit 28 and the charging circuit 29 at the same time is provided.

FIG. 13 shows the circuit of the adapter 37.

31a and 31b are terminals connected to commercial power supply, 3
2a.

32b is a terminal connected to the plug 15, 33 is a transformer,
34 and 35 are rectifying diodes, and 36 is a fuse.

Next, the operation of this rechargeable electric device will be explained.

During normal use, the cover 19 is closed as shown in FIG. come into contact with.

That is, the surface unit switches 26a and 26b are closed.

Therefore, when the operation switch 30 shown in FIG. 12 is closed, the motor 8 rotates and becomes ready for use.

In addition, since the lid body 19 is closed and the lid body 19 and the periphery of the plug insertion recess 13 of the lower cover 12 are in pressure contact via the O-ring 18a, the watertightness in the plug insertion recess 13 is complete. For example, even if you wash it with water, there is no problem of water getting inside.

It also provides a dustproof effect. As shown in FIG.
9 is left in the open state, the movable contact piece 24 of the plug receiving switch 26 returns the movable pin 23 to the protruding state by its own spring force and separates from the fixed contact piece 25.

That is, the surface unit switches 26a and 26b are opened.

Therefore, even if the operation switch 30 is closed, the motor 8 does not rotate.

Therefore, the lid body 19 will not be used with the lid open by mistake, and damage to the equipment due to intrusion of dust or water from washing can be prevented.

When charging or when using an AC commercial power source, the plug 15 of the adapter 37 is inserted into the plug insertion recess 13 with the lid 19 open, as shown in FIG.

When the plug 15 is inserted, the movable pin 2 is moved by the plug 15.
3 is pushed upward, and the movable contact pieces 24 of the surface unit switches 26a and 26b of the plug receiving switch 26° are moved to the fixed contact pieces 25.
come into contact with.

Therefore, the storage battery 6 can be charged, and when the operation switch 30 is closed, the motor 8 can be driven by the commercial power source.In addition, when the plug 15 is inserted, the protrusion 15a of the plug 15 The O-ring 18b is compressed to provide complete watertightness between the opening of the plug insertion recess 13 and the plug 15.

Therefore, even if water droplets splash onto the plug 15 during washing, the plug 15 will not enter the case 5, and can be safely used and charged using a commercial power source.

Furthermore, if the plug 15 is not fully inserted when the plug 15 is inserted, the movable contacts 24 of both unit switches 26a and 26b of the plug receiver switch 26 will not come into contact with the fixed contact piece 25, and the operating switch 30 Even if the motor 8 is closed, the motor 8 will not operate.

Therefore, it is possible to prevent the plug 15 from being inserted in an incomplete state and accidentally immersing it in water for washing, or from being exposed to water droplets, making it safe. It may be provided detachably on the case 5, but if it is pivoted with a pivot pin 20 as in this embodiment,
Loss of the lid body 19 can be prevented.

Further, in the above embodiment, the recessed plug insertion recess 13 was provided as the plug insertion portion, but the plug insertion portion was made planar,
The lid that closes this may be cup-shaped.

Further, in the above embodiment, the O-rings 18a and 18b were provided on the plug 15 and the lid body 19, but the O-ring 18 a t
18b is not necessarily provided, the present invention can sufficiently obtain effects such as dustproofing.

As described above, the rechargeable electric device of the present invention is provided with a movable pin whose tip protrudes from inside the case into the plug insertion recess and which can be pushed in and returned to its original position. Since the movable pin is configured to be pushed into the plug insertion recess or by closing the lid of the plug insertion recess, there is no possibility that the plug may not be inserted incompletely. If the lid is left open, or if the lid is not completely closed, the charging circuit and other electrical circuits will not be closed, and therefore the charging circuit and other electrical circuits will not be closed due to incorrect use in each of the above cases, resulting in dust and dirt. There is no problem of malfunction caused by intrusion of water from cleaning or washing.

[Brief explanation of drawings]

Figures 1 to 3 are explanatory diagrams showing conventional rechargeable electric shavers, Figure 4 is a cutaway side view of an embodiment of the present invention, Figure 5 is an enlarged sectional view of its head, and Figure 6 7 is a bottom view of the tail, FIG. 8 is a sectional view of the tail with the lid open, FIG. 9 is a sectional view of the tail with the plug inserted, and FIG. 10 is a sectional view of the tail with the lid open. 11 is a sectional view of the adapter, FIG. 11 is a perspective view of the plug, and FIG. 12 is a sectional view of the adapter.
The figure shows the circuit diagram of the charging circuit and motor drive circuit, and Figure 13 shows the circuit diagram of the adapter.0 5... Case, 6... Storage battery, 7...
...Charger, 8...Motor, 9...
・Blade mounting base, 10...Fixed blade, 11...
・Backing, 12...Lower cover, 13...
...Plug insertion recess, 14...01J,
15...Plug, 16...Touch piece, 17
...Plug receiving pin, 18a, 18b...
・01) Ning, 19... Lid body, 20...
・Pivot pin, 21... Lid locking button, 22...
...Return spring, 23...Movable pin, 24.
...Movable contact piece, 25...Fixed contact piece, 26
...Plug receiving switch, 26a, 26b...
...Unit switch, 27a. 27b...terminal, 30...operation switch.

Claims (1)

[Claims] 1. A case containing a charging circuit and other electric circuits;
A plug insertion part is provided in the case and serves as a plug receptacle, and a plug is inserted into the plug insertion part, the tip of which protrudes from inside the case into the plug insertion part so that it can be pushed in and returned to. a movable pin provided in the case and closing the charging circuit and the other electric circuit by pushing the movable pin; and a plug receptacle switch that closes the charging circuit and the other electric circuit by pushing the movable pin; and a lid into which the movable pin is pushed. 2. The rechargeable electric device according to claim 1, wherein the lid body is rotatably attached to the case at one end so that it can be opened and closed.