JPS6233705B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charger applicable to electric shavers and the like.

Some conventional chargers of this type have a plug blade that can be retracted and retracted so that the plug blade can be pushed out and plugged into an outlet to charge the battery when necessary. (For example, in 1977-
No. 33718). However, since there is a gap between the plug blade and the case, there is a drawback that dust can enter through the gap and cause malfunctions such as poor contact at the switch contact. Particularly when applied to an electric razor, there is a risk of beard debris entering. Furthermore, there is a risk that water may enter through this gap and cause a short circuit, so it has the disadvantage that it cannot be applied to waterproof electric shavers or flashlights.

Therefore, an object of the present invention is to provide a charger that can make the plug blade appear and disappear, and is also dustproof and waterproof.

An electric shaver to which an embodiment of the present invention is applied is shown in FIGS. 1 to 7. That is, this rotary electric razor (reciprocating type may also be used) has a razor body 1 which forms a charger case 5a at its rear end, and a blade portion 2 consisting of an outer blade and an inner blade for cutting beards on the bent head. A motor M and a switch S are installed in the middle part, a charger body consisting of a storage battery 3, a transformer 4 and a diode D is installed below the motor M, and a razor body 1 is installed below the charger body.
A plug device 5 is installed in the charger case 5a at the rear end.

The electrical wiring for this electric shaver is as shown in Figure 3, by connecting the plug blades 6, 6' to the primary side of the transformer 4 of the charger body, and connecting the storage battery 3 to the secondary side of the transformer 4 via a diode D. A motor M is connected to both ends of the storage battery 3 via a motor control switch S and a plug switch PS. The plug switch PS operates to open the circuit when the plug blades 6, 6' are in the protruding state, so that the motor M is not driven. Therefore, while the plug blades 6, 6' are protruding, only the storage battery 3 is charged, and when the switch S is turned on with the plug blades 6, 6' recessed, the motor M is supplied with power from the storage battery 3. , rotationally driven. As a result, the inner cutter connected to the motor shaft rotates, and the cutter portion 2 becomes operational.

Now, the plug storage chamber 7 of the plug device 5 has an opening 8 on the side, and a gap 11 is formed in the plug between one side wall 9 of the storage chamber 7 and one side wall 10 of the razor body 1, as shown in FIG. Then, the connecting portions 12 and 12' of the plug switch PS are extended from the charger body of the razor body 1. Attachment holes 13, 13' are bored at the tips of these connecting parts 12, 12'.
3' are formed in the side wall 9 of the plug storage chamber 7, and these mounting holes 1
3, 13' and the insertion holes 14, 14', and insert the conductive rubber 15, which is the energizing tool of the plug switch PS.
15' is press-fitted and tightly attached to the insertion holes 14, 14'.

On the other hand, a pair of side plates 16 extend outward from one opposing part of the opening 8 of the plug storage chamber 7 in the same direction as the opening direction of the opening 8, and a square ring-shaped groove 1 is formed in the opening 8.
6' and a waterproof packing 17 is fitted therein, vertical slits 18, 18' are formed on the inner surface of the side plate 16, and a click stop protrusion 19 is formed at the upper end of the vertical slits 18, 18'. A pair of holes 20, 20' are formed in the top wall, and a retaining piece 21 is suspended.

The plug has plug blades 6, 6' embedded in a plug base 22, and the plug base 22 is a plate-shaped body corresponding to the opening size of the opening 8 of the plug storage chamber 7,
A projection 23 that fits into the vertical slits 18, 18' is formed at one end of both sides, a retaining projection 24 is formed on the other end surface of the plug base 22 opposite to the projection 23, and a knurl is formed on the surface of the plug base 22. 25 and a finger hook part 26 are formed. A pair of plug blades 6,
6' has a base end buried in the back surface of the plug base 22, and the base end is bent into an L shape to connect to the plug base 22.
Terminals 27, 27' exposed at the end on the protrusion 23 side
is formed.

Also, on the back side of the ceiling wall of the opening 8, that is, on the side of the charger body, there is a connecting fitting 2 that connects to the primary side of the transformer 4.
8, 28' are located, their mounting holes face the holes 20, 20', and the conductive rubber 2 is placed in these holes.
9 and 29' are press-fitted and brought into close contact, and their flange portions protrude toward the opening side by the thickness thereof.

To attach the plug base 22, the both sides of the opening 8 of the plug housing chamber 7 are warped and opened using the elasticity of the resin, thereby fitting the protrusion 23 of the plug base 22 into the vertical slits 18, 18'. .

FIG. 1 shows a state in which the plug blades 6, 6' are housed in the plug housing chamber 7 and the opening 8 is closed with the plug base body 22. In this state, the protrusion 23 is located at the lower end of the vertical slits 18, 18', and the retaining protrusion 24
is engaged with the retaining piece 21, the inner surface of the peripheral edge of the plug base 22 is in close contact with the waterproof gasket 17, and one of the plug blades 6, 6' is pressed onto the conductive rubber 15, 15'. , 6' are exposed at the lower end of the razor body 1. As a result, the opening 8 of the plug housing chamber 7 is connected to the plug base 22.
The insertion holes 20, 20' of the top wall are dust-proof and waterproof by the conductive rubber 29, 29', and the insertion holes 20, 20' of the top wall are made dust-proof and waterproof by the interposition of the waterproof gasket 17. Holes 14, 14'
is made dustproof and waterproof by conductive rubber 15, 15'.
The inside of the razor body 1 is completely sealed.
Also, one of the plug blades 6, 6' contacts the conductive rubbers 15, 15' and conducts the conductive rubbers 15, 15' with each other, so the plug blade 6 acts as a movable contact and is in the closed state. Therefore, when the motor control switch S is turned on in the circuit shown in FIG. 3, the motor M is driven.

5 to 7 show the procedure for protruding the plug blades 6, 6'. First, FIG. 5 shows the finger hook 26 and knurl 2 at the upper end of the plug base 22.
5, the protrusion 24 is removed from the retaining piece 21, and the protrusion 24 is rotated about 45 degrees about the rotation center. Figure 6 shows the state in which it has been rotated further to 180 degrees. At this time, the plug blades 6, 6' completely protrude outward. In FIG. 7, the plug base 22 is slid in this state, and the protrusion 23 is engaged with the click stop protrusion 19 at the upper end of the vertical slits 18, 18'. In this state, one of the plug blades 6, 6' has come off the conductive rubber 15, 15', so the plug switch PS is opened and the motor M is not operated by the switch S. Furthermore, the exposed portions 27, 27' of the proximal ends of the plug blades 6, 6' come into elastic contact with the conductive rubbers 29, 29', so that the plug blades 6, 6' and the primary side of the transformer 4 are electrically connected. Therefore, when the plug blades 6, 6' are plugged into an outlet, the storage battery is charged. When storing the plug blades 6, 6' in the plug housing chamber 7, the slides may be reversed in the same manner as described above.

With this structure, this electric shaver has the following effects. That is, (1) Since the plug base body 22 covers the plug housing chamber 7, there is a dustproof effect.

(2) Since the waterproof gasket 17 is provided, the dustproof effect is further improved and the waterproof effect is also achieved.

(3) Since a plug switch PS is installed, electrical equipment that can be used with a charger cannot be used unless the lid is closed, so dust and water will not inadvertently enter.

(4) By using the plug blade 6 as a movable contact for energizing short circuit of the plug switch PS, a short circuit fitting is unnecessary, and the structure is simplified and downsized.

(5) The plug blade 6 is held by the conductive rubber 15, 15', which simplifies the structure and reduces the size.

(6) By arranging a charged component between the plug blades 6 and 6' housed in the plug housing chamber 7, effective use of space can be achieved.

As described above, the charger of the present invention includes a waterproof gasket attached to the opening of the plug storage chamber, and a pair of waterproof gaskets extending outward from one opposing portion of the opening in the same direction as the opening direction of the plug storage chamber. a charger case having a conductive rubber for power supply forming a slit facing oppositely to the opposite side of the side plate and extending through one end of the slit; and a charger case that closes the opening and is in close contact with the waterproof packing. A plug base is provided with a plug blade that protrudes into the plug housing chamber, and the plug base is reversible so that the plug blade is slidably and rotatably engaged with the slit so that the plug blade projects outside the plug housing chamber. A plug having supporting protrusions protruding from both sides of the plug base, and further having a terminal that contacts the conductive rubber with the plug blade protruding outside the plug housing chamber and is connected to the plug blade. The preparation has the following effects.

That is, a plug base that closes the opening of the plug storage chamber is provided in a reversible manner, a waterproof packing is interposed in the opening, and a conductive rubber is provided through the charger case with which the terminal contacts with the plug blade protruding. It is possible to make the plug blade appear and disappear, and it is also dustproof and waterproof.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the external appearance of a part of an electric shaver to which an embodiment of the present invention is applied, Fig. 2 is a cross-sectional view taken along the line - Fig. 3 is an electric circuit diagram, and Fig. 4 is a plug device. The exploded perspective view and FIGS. 5 to 7 are sectional views of essential parts showing the process of sliding and reversing the plug base. 5a... Charger case, 6, 6'... Plug blade, 7... Plug storage chamber, 8... Opening, 16... Side plate, 17... Waterproof gasket, 18... Slit, 22... Plug base, 23... Protrusion, 27, 27 '...terminal, 29,2
9'...Conductive rubber.

Claims (1)

[Scope of Claims] 1. A waterproof gasket is attached to the opening of the plug storage chamber, and opposing surfaces of a pair of side plates extend outward from one opposing portion of the opening in the same direction as the opening direction of the plug storage chamber. a charger case having a slit facing opposite to the slit and having a conductive rubber for power supply penetrated through one end of the slit, and a plug base that closes the opening and is in close contact with the waterproof packing. A protrusion is provided with a plug blade projecting into the housing chamber and slidably and rotatably engages with the slit to reversibly support the plug base so that the plug blade projects outside the plug housing chamber. A charger comprising: a plug provided with a terminal protruding from both sides of a plug base, the plug contacting the conductive rubber with the plug blade protruding outside the plug housing chamber, and being connected to the plug blade. 2. The charger according to claim 1, wherein the plug housing chamber includes a plug switch that is conductive when the plug body is in a state where the plug blade is stored. 3. The charger according to claim 2, wherein the plug switch is a pair of energizing tools facing each other with one of the plug blades serving as a movable contact. 4. The charger according to claim 3, wherein the energizing tool is made of conductive rubber to hold the plug blade.