JPS6018431B2 - rotating plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary plug used in a power adapter or a charging device for an electric shaver.

Conventional power adapters and electric shaver charging devices for obtaining low DC voltage from a commercial power source have had the disadvantage that the plug blade for receiving power gets in the way when the plug is not in use.

Therefore, the inventors of the present invention have attempted to use a rotary plug in which the power receiving blade is rotatable, and the plug blade can be stored in the housing when the plug blade is not in use. However, such rotating plugs have the problem that when the plug is turned while energized, heat is generated at the contact sliding part and sparks fly, causing poor contact. . The present invention has been made to solve these problems of the conventional example, and prevents the rotatable plug blade from moving carelessly while energized, thereby reducing heat generation in the contact hammer part. A rotating plug that can prevent the generation of sparks and prevent the full blade from accidentally protruding from the storage part when the plug blade is not in use. The purpose is to provide

The configuration of the present invention will be described below with reference to illustrated embodiments.

Figure 1 shows a state in which a charging adapter using a rotating plug of the present invention is connected to a waterproof electric shaver 2, and as shown in the figure, power is received from the back of the housing 3 of the charging adapter 1. A plug blade 4 for use is protruded, and a charging device such as an electric shaver 2 can be charged by plugging the plug blade 4 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. A housing cover 6 is attached to the front and top surfaces of the housing 3, and a support piece 7 protrudes from the upper edge of the housing cover 6 to support a main body of a charging device such as an electric shaver 2. It is formed. A connector 8 is formed protruding from the center of the upper surface of the housing cover 6, and a pair of terminal holes 9 of the connector 8 are formed.
A low voltage DC power source is obtained from a and 9b. A positioning recess 10 is formed on the front side of the connector 8, and this recess 10 is aligned with a positioning projection provided on the outside of a power receiving connector of a charging device such as an electric shaver 2. This ensures that the polarity of the DC power supply is connected correctly. 11 is a notch for draining water, and the lower end of this notch 11 is flush with the top surface of the housing cover 6, and the waterproof electric shaver 2
It is designed to prevent water from accumulating between the bottom surface of the charging device and the top surface of the housing cover 6 when the charging device is wet.

Reference numeral 12 also designates a closing portion 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 portion 12.

Next, FIGS. 3a and 3b show the external appearance of the charging adapter 1 shown in FIG. 2 when viewed from the back side, and as shown in FIG. It is designed to be able to rotate 90o. The corner of the lower end of the rear side of the housing 3 is an inclined surface 13, so that the tip of the cypress blade 4 can be easily projected and rotated by hooking a finger on the tip. In addition, the upper surface of the housing cover 6 has a roof-shaped complicated slope 1.
4a and 14b, and the water droplets falling from above are made to flow toward the side of the plug blade 4 instead of flowing toward the plug blade 4. 15 is a mounting screw;
Screw holes 1 formed in the housing 3 as shown in FIG.
6 to tighten and fix the housing cover 6 to the housing 3.

A pair of vertical grooves 17 are formed in the lower part of the back 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 adapter 1 using a rotating plug according to the present invention, the main parts of which are the housing 3, the step-down transformer 18 mounted in the housing 3, the front surface of the housing 3, and the It is composed of a housing cover 6 that covers the upper surface and a blade block 19 that is rotatably attached to the back side of the housing 3.

First, the blade block 19 is made up of a pair of metal blades 4 and a base part 20 made of a resin molded product into which the blades are insert-molded. An engaging protrusion 21 is formed at the center of the surface opposite to the protruding direction. 22 is a medium wide recess;
As shown in FIGS. 6 and 7, a hollow portion is formed behind the engagement protrusion 21, and for this reason, the portion where the engagement protrusion 21 is formed is elastic in the direction shown by arrow B. It can be transformed.

23 is a shaft portion protruding from the base portion 20;
3 is integrally molded with a base part 20 made of synthetic resin with a metal plug blade 4 in between, as shown in FIG.

Reference numeral 24 denotes a current-carrying metal fitting, a semicircular notch 25 formed at the tip thereof is engaged with a koji part 23 of the plug blade block 19, and between the current-carrying metal fitting 24 and the plug blade 4 is a metal plate for maintaining the current supply. A spring washer 26 is interposed.

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, and the connecting portion is soldered as shown in FIG. Among the pair of secondary terminals 29a and 29b of the step-down transformer 19, one secondary terminal 29a is connected to a rectifying diode 3.
One end of the 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 19.
The other end is soldered at the eyelet fitting 32 as shown in FIG. The fitting 32 is a current-carrying spring body 33
is inserted into the insertion hole 35 formed in the base piece 34 of
- The energizing spring body 33 is fixedly installed on the upper surface of the housing 3. An engagement hole 36 for positioning is provided 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 portion 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 into 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 projection 41 through which the locking hook 39 can pass is used to separate the pair of current-carrying spring bodies 33 from each other, and the upper surface of the housing 3 is curved down on both sides with the projection 41 as a boundary. Therefore, in the unlikely event that the terminal holes 9a, 9 of the connector 8
Even if water enters from b, the water flows 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, in order to prevent the filler 42 from flowing out from the hole of the eyelet fitting 32, at the connection part between the lead wire 31 and the eyelet fitting 32, the hole of the eyelet fitting 32 is covered entirely. It is soldered. Since the area around the step-down transformer 18 is filled with the filling material 42 such as epoxy resin, there is no need for any special fixing means for fixing the step-down transformer 18. terminal 27
Alternatively, the electrically connected parts of the secondary terminals 29a and 29b are covered with the insulating filler 42, so even if water droplets are splashed on the charging adapter 1, water will not reach these electrically connected parts. This kind of thing can be prevented. Next, the rotary light of the cypress blade block 19 will be explained. First, the shaft portion 23 of the cypress blade block 19 is connected to the semicircular notch 2 of the current-carrying metal fitting 24.
5, and can be rotated by being engaged with the housing cover 6, and a projecting step 43 formed on the back side of the housing cover
3 from falling off from the notch 25. As described above, the housing cover 6 is vertically fixed to the housing 3 by the mounting screws 15, so that the protruding portion 43 is pressed against the shoulder portion 23 with appropriate pressure. Bung blade 4 and current-carrying metal fitting 2
4 is electrically conductive with the spring washer 26 as described above.
This is done by. Therefore, the engagement protrusion 21 of the blade block 19 is engaged with the engagement recess 44 formed on the back surface of the housing 3 when the full blade 4 is projected, and the engagement protrusion 21 of the blade block 19 is engaged with the engagement recess 44 formed on the back surface of the housing 3. When you fold it into
The engagement protrusion 21 slides on a circular sliding surface 45 and is locked in another engagement recess 46 formed at the upper end of the sliding surface 45, as shown in FIG. . At this time, since the base portion 20 of the blade block 19 is provided with the recess 22 as described above, the portion where the engagement protrusion 21 is formed is directed in the direction shown by the arrow B in FIGS. 6 and 7. Therefore, the engagement protrusion 21 can be elastically deformed into the engagement recesses 44, 46.
It is designed to provide a good click action when it is locked in place. The present invention is constructed as described above, in which a plug blade for receiving power from a base part rotatably supported by the housing is provided protrudingly, and the plug blade is stored in a position flush with the housing. A recess in the desired shape is formed on the surface of the housing, and the base portion is locked at a position where the plug blade protrudes perpendicularly to the housing and at a position where the plug blade is stored flush with the housing. as possible,
Since the base part and the housing have an engaging protrusion on one side and an engaging recess on the other side, the blade can be stored when the blade is not in use or when the blade is protruded. When all the blades are energized, all the blades are engaged with the engagement protrusion and the engagement recess so that they do not move easily.
Therefore, it is possible to prevent the rotatable plug blade from inadvertently moving during energization and generating heat or sparks at the contact sliding part, thereby significantly increasing the safety of the plug. This has the advantage of being rotatable, and since the rotatable blade is locked even in the storage position, there is no need for the blade to inadvertently protrude from the storage area when the Senzenblade is not in use. This has the advantage that it can also prevent the following.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a connection state between an electric shaver and a charging adapter using a rotating plug according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the appearance of the front side of the same charging adapter. Figures 3a and 3b are perspective views showing the appearance of the rear side of the above, Figure 4 is a perspective view of the same with the housing cover removed, Figure 5 is an exploded perspective view of the same, and Figure 6 is an exploded perspective view of the same. A broken side view of the main part of the same as above, Fig. 7 is a vertical sectional view of the main part of the same as the above, Fig. 8 is a front sectional view of the same as the above, Fig. 9 is a cutaway plan view of the main part of the same as the above, and Fig. 10 is a view of the same as the above. FIG. 3 is a housing, 4 is a plug blade, 17 is a vertical groove, 20 is a base portion, 21 is an engagement projection, and 44 and 46 are engagement recesses. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Scope of Claims] 1. A plug blade for power reception is provided protruding from a base portion rotatably supported by the housing, and a recess shaped to accommodate the plug blade is provided at a position flush with the housing. formed on the surface of the housing,
One side of the base part and the housing so that the base part can be locked at a position where the plug blade protrudes perpendicularly to the housing and a position where the plug blade is stored flush with the housing. A rotatable plug characterized by having an engaging protrusion on one side and an engaging recess on the other side. 2. An engaging means consisting of either an engaging protrusion or an engaging recess is formed approximately in the center of the base part whose both ends are pivotally supported by the housing, and the engaging means is formed in the base part. 2. The rotatable plug according to claim 1, wherein the formed portion is elastically deformable.