JPH0328020B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charging device used in a charging device operated by a rechargeable storage battery, such as an electric shaver.

Conventionally, a charging device that is used by connecting to a power outlet has a structure in which the power-receiving plug blade can be raised and folded freely, and the plug blade can be stored inside the housing of the charging device when charging is not performed. Widely used. However, in such a structure, it is necessary to pivotally support the plug blade block in the housing and connect the rotatable power receiving plug blade to the primary winding of the step-down transformer inside the housing. Since it is rotatable, it has the disadvantage that the structure becomes complicated.

The present invention has been made to eliminate these drawbacks of the conventional example, and provides a charging device that has a simple rotating structure of the plug blade and a simple connection structure with a step-down transformer, and is easy to assemble. The purpose is to

The configuration of the present invention will be described below with reference to illustrated embodiments. FIG. 1 shows the charging device 1 of the present invention connected to a waterproof electric shaver 2, and as shown in the figure, a plug blade 4 for receiving power protrudes from the back of the housing 3 of the charging device 1. This plug blade 4
The device is used to charge a charging device such as an electric shaver 2 by plugging it into a power outlet. As shown in FIG. 2, a protrusion 5 is formed on the side surface of the housing 3 to prevent slipping when the plug blade 4 is inserted into or removed from a power outlet. Further, a housing cover 6 is attached to the front and upper surfaces of the housing 3, and a support piece 7 for supporting the main body of a charging device such as an electric shaver 2 is formed protruding from the upper peripheral edge of the housing cover 6. has been done. A connector 8 is formed projecting from the center of the upper surface of the housing cover 6, and a low voltage DC power source is obtained from a pair of terminal holes 9a, 9b of the connector 8. connector 8
A positioning recess 10 is formed on the front side of the , and this recess 10 fits into a positioning protrusion provided on a power receiving connector of a charging device such as an electric shaver 2 to connect a DC power source. This is to ensure that the polarity is connected correctly. Reference numeral 11 denotes a notch for draining water, and the lower end of this notch 11 is flush with the top surface of the housing cover 6, so that it can be used for charging equipment that is wet with water, such as the waterproof electric shaver 2. It is designed to prevent water from accumulating between the bottom surface and the top surface of the housing cover 6. Reference numeral 12 also designates an opening for draining water, so that in the event that water enters through the terminal holes 9a, 9b of the connector 8, the water can be drained from the opening 12. Next, FIGS. 3a and 3b show the external appearance of the charging device 1 shown in FIG. 2 when viewed from the back side, and as shown in FIG.
It is designed to be able to rotate 90° in the direction shown.
The lower corner of the rear side of the housing 3 has an inclined surface 13.
The blade 4 can be easily projected and rotated by hooking a finger on the tip of the blade 4. Further, the upper surface of the housing cover 6 has roof-shaped sloped surfaces 14a and 14b, so that water droplets falling from above flow toward the side of the plug blade 4 instead of flowing toward the plug blade 4. It is something that
A mounting screw 15 is screwed into a screw hole 16 formed in the housing 3, as shown in FIG. 4, to tighten and fix the housing cover 6 to the housing 3. A pair of vertical grooves 17 are formed in the lower rear surface of the housing 3, so that the blade 4 can be stored when the blade 4 is not needed.

FIG. 5 is an exploded perspective view of the charging device 1 of the present invention, the main parts of which are the housing 3 and the housing 3.
A step-down transformer 18 mounted therein and a housing cover 6 that covers the front and top surfaces of the housing 3
and a plug blade block 19 rotatably mounted on the back side of the housing 3. First, the plug blade block 19 includes a pair of metal plug blades 4,
It is composed of a base part 20 of a resin molded product in which the plug blade 4 is insert-molded, and this base part 20
An engaging protrusion 21 is formed at the center of the surface opposite to the direction in which the blade 4 protrudes. 2
Reference numeral 2 denotes a wide recess, and as shown in FIGS. 6 and 7, this recess 22 forms a cavity behind the protrusion 21, so that the protrusion 21 The portion formed with can be elastically deformed in the direction shown by arrow B. Reference numeral 23 denotes a shaft portion protruding from the base portion 20, and as shown in FIG. There is. 24 is a current-carrying metal fitting, and a semicircular notch 2 is formed at the tip thereof.
5 is engaged with the shaft portion 23 of the blade block 19,
A spring washer 26 is interposed between the energizing metal fitting 24 and the stopper blade 4 for maintaining energization. A notch 28 that engages with the primary terminal 27 of the step-down transformer 18 is formed on the base end side of the current-carrying metal fitting 24.
The connecting portion is soldered as shown in FIG. Among the pair of secondary terminals 29a and 29b of the step-down transformer 18, one secondary terminal 29a
One end of a rectifying diode 30 is connected to the other end 30a of the diode 30, and one end of a lead wire 31 is connected to the other end 30a of the diode 30 and the other secondary terminal 29b of the step-down transformer 18. The other end is soldered at the eyelet fitting 32 as shown in FIG. The eyelet fitting 32 has an insertion hole 35 formed in the base piece 34 of the current-carrying spring body 33.
The current-carrying spring body 33 is inserted into the housing 3.
It is fixedly installed on the top surface of the An engagement hole 36 for positioning is formed at the end of the base piece 34,
A protrusion 37 protruding from the upper surface of the housing 3 is engaged with the engagement hole 36 . Further, the position of the peripheral edge of the base piece 34 is regulated by a positioning recess 38 formed on the upper surface of the housing 3. Reference numeral 39 denotes a locking hook formed on the upper surface of the housing 3, and is adapted to be locked in a locking hole 40 formed on the lower surface side of the housing cover 6. The housing 3 and the housing cover 6 are fixed to each other by the locking hook 39 and the mounting screw 15. A protrusion 41 communicating with the locking hook 39 is for separating the pair of current-carrying spring bodies 33 from each other, and the upper surface of the housing 3 is inclined downward to both sides with this protrusion 41 as a boundary. Therefore, even if water should enter through the terminal holes 9a, 9b of the connector 8, the water will flow down along the upper surface of the housing 3. Further, the area around the step-down transformer 18, indicated by C in FIGS. 6 and 8, is filled with an insulating filler 42 such as epoxy resin. At this time, the filler 42 is attached to the eyelet fitting 32.
To prevent water from flowing out through the holes in the
At the connection portion between the lead wire 31 and the eyelet fitting 32, soldering is performed so as to cover the entire hole of the eyelet fitting 32. In this way, a filler 4 such as epoxy resin is placed around the step-down transformer 18.
2 is filled everywhere, so the step-down transformer 1
8 is no longer necessary, and the electrical connection portions of the primary terminal 27 of the step-down transformer 18 or the secondary terminals 29a and 29b are covered with the insulating filler 42. Therefore, even if water droplets are splashed on the charging device 1, water can be prevented from splashing onto these electrical connection parts. Next, the rotation mechanism of the blade block 19 will be explained. First, the shaft portion 23 of the blade block 19 will be explained.
is adapted to be able to rotate by being engaged with a semicircular notch 25 of the current-carrying metal fitting 24, and a protruding step 43 formed on the back side of the housing cover 6 allows the shaft portion 2 to rotate.
3 from falling off from the notch 25. This housing cover 6
also serves as an insulating cover for covering the current-carrying metal fitting 24 that protrudes outside the housing 3. As mentioned above, the housing cover 6 is tightened and fixed to the housing 3 by the mounting screws 15, and thereby the protruding portion 43 is pressed against the shaft portion 2 with appropriate pressure.
3. Bung blade 4
Electrical conduction between the current-carrying metal fitting 24 and the current-carrying metal fitting 24 is performed by the spring washer 26 as described above. Therefore, the protrusion 21 of the blade block 19
When the blade 4 is in a protruding state, it is locked in an engagement recess 44 formed on the back surface of the housing 3, and when the blade 4 is bent downward, the protrusion 21 slides into a circular shape. It slides on the surface 45 and is locked in another engagement recess 46 formed at the upper end of the sliding surface 45, as shown in FIG. On this occasion,
Since the base portion 20 of the blade block 19 is provided with the recess 22 as described above, the portion where the projection portion 21 is formed is elastically deformed in the direction shown by the arrow B in FIGS. 6 and 7. Therefore, when the protrusion 21 is locked in the engagement recesses 44, 46, a good click action can be obtained.

The present invention is constructed as described above, and a substantially semicircular notch is formed at the tip of the current-carrying metal fitting that can protrude outside the housing, and the shaft of the plug blade block is engaged with the notch of the current-carrying metal fitting. Since the insulating cover that presses the shaft of the blade block from the opening side of the notch is fixed to the housing, the blade block can be reliably supported with a simple structure, and the blade block can be supported securely. It has the advantage of being able to be attached to the housing and pivot the blade block at the same time, and also because a conductive spring washer that is pressed into contact with both the current-carrying metal fitting and the blade is fitted onto the shaft. This has the advantage that it is possible to make a good electrical connection between the rotatable plug blade and the current-carrying metal fitting fixed to the housing, and furthermore, the shaft of the plug blade block can be connected to the notch at the tip of the current-carrying metal fitting. Since the parts are engaged and covered with an insulating cover, the plug blade block can be assembled after the current-carrying metal fittings connected to the step-down transformer are assembled into the housing, and can be assembled by simply assembling the parts one after another. This makes it easy to assemble.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a connection state between a charging device and an electric shaver according to an embodiment of the present invention, FIG. 2 is a perspective view showing the front appearance of the same charging device, and FIGS. 3 a and b is a perspective view showing the appearance of the rear side of the same as above,
FIG. 4 is a perspective view of the same as the above with the housing cover removed, FIG. 5 is an exploded perspective view of the same as the above, FIG. 6 is a broken side view of the main parts of the same, and FIG. FIG. 8 is a front sectional view of the same as the above, FIG. 9 is a fragmentary plan view of the essential parts of the same, and FIG. 10 is a fragmentary side sectional view of the essential parts of the same. 3 is a housing, 4 is a plug blade, 6 is a housing cover, 18 is a step-down transformer, 19 is a plug blade block, 20 is a base part, 23 is a shaft part, 24 is a current-carrying metal fitting, 25 is a notch part, 26 is a spring washer It's ya.

Claims (1)

[Claims] 1. A step-down transformer is built in the housing, a pair of current-carrying metal fittings connected to the primary winding of the step-down transformer are provided protruding outside the housing, and a substantially semicircular notch is formed at the tip of each of the current-carrying metal fittings, A pair of conductive plug blades is fixed on both sides of an insulating base that constitutes a power receiving plug blade block, and a shaft portion is formed to protrude from the surface of each blade toward both sides of the base. A conductive spring washer that engages with the notch of the current-carrying metal fitting and press-contacts both the current-carrying metal fitting and the stopper blade is fitted onto the shaft portion, covering the current-carrying metal fitting protruding from the outside of the housing, and A charging device comprising: an insulating cover fixed to a housing for pressing the shaft of the plug blade block from the opening side of the notch.