JPS624302Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to small electric appliances such as electric shavers, and when trying to make the thickness extremely thin and lightweight, the invention is made thinner by cleverly incorporating switch parts etc. into this narrow space. This has been realized.

An example of the structure will be described below based on the drawings. 1 is an outer cutter frame 3 in which outer cutters 2 are stretched in an arch shape.
The body case of the vibrating electric shaver has a box-shaped shaving blade on the top and an inner cutter (not shown) inside the shaving blade, and is made of synthetic resin. The thickness of the main body case 1 is made very thin, and is slightly wider than the width l of the charging plug 4 which is slidably housed in the bottom part. In addition to the charging plug 4, a secondary battery, a motor, charging parts (all not shown), etc. are neatly housed within the main body case 1 in a space. By the way, the switch part required to drive the motor or form a charging circuit is generally provided with a switch plate having a shorting contact on the back side, and facing the switch plate, and is connected to the switch by the shorting contact. It consists of a printed circuit board on which the circuit network to be cut is formed, but in order to incorporate these, it is not possible to simply stack the switch plate, shorting contact piece, and printed circuit board sequentially in the thickness direction of the main body case. The case becomes thicker, making it difficult to make it thinner. The present invention has been designed with these points in mind.
A mounting window 5 for a switch knob 7 is formed in the front wall 6 of the main body case 1 at one side of the upper part thereof. A long and narrow switch plate 8 made of synthetic resin is provided along the inner surface of the front wall 6, and the switch plate 8 has a notch 9 in the upper part where the claw pieces 10, 10' on the back side of the switch knob 7 are formed. One of them 10 is locked so that the switch plate 8 can be slid up and down within the stroke a range of the window hole 5.
Reference numeral 11 denotes a wall section for attaching a switch contact piece, which is provided upright at approximately the middle portion 8' of the switch plate 8, and is oriented in the thickness direction of the main body case 1. In this case, the shorting contact piece 12 is connected to the dowel 13,1
3 and the mounting holes 14, 14, and the three switch pieces 15, 15, 15 of the short circuit contact piece 12 are attached to the inner surface 1 of the wall part 11 from the window holes 16, 16, 16.
1'' side. Also, in the middle part 8' of the switch plate 8 corresponding to this wall part 11, a slit slot 17 is cut on the right side, and an arcuate wall piece is provided in the center. An elastic groove hole 20 is formed in which the grooves 18 and 18 face inward toward each other and a narrowed portion 19 is formed.A circuit network 21 is formed on the surface 21' side of the wall portion 11 opposite to the inner surface 11'' side. It is a printed circuit board with printed wiring, and is mounted on the inner wall 1' of the main body case so as to be in close contact with and opposite to the wall 11. The method is printed circuit board 21
The leg portions 22, 22 at both lower ends are the case inner wall 1'
It is fitted between an upper U-shaped wall portion 23 which is formed in the upper U-shaped wall portion 23 and an L-shaped wall portion 25 that is integrated with a support portion 24 into which screws for fixing the case are inserted. At this time, the recessed notch 26 at the lower end of the printed circuit board 21 straddles the intermediate portion 8' of the switch plate 8 so as not to interfere with the vertical movement of the switch plate 8. The switch plate 8 is pressed against the inner wall 1' of the case by attaching the printed circuit board 21, and the elastic slot 20
is an articulation protrusion 27 formed on the inner wall 1' of the case.
and fit together as shown in Figure 1. Furthermore, a claw piece 28 for locking the charging plug 4 is provided at the lower end of the switch plate 8. Next, this mechanism will be explained.
The charging plug 4 is inserted into a space between the bottom wall 29 and the internal horizontal wall 30 of the main case so that the plug blades 31, 31 can be slid in and out from the side using an extrusion knob 32 at the bottom. ing. The lower part of the switch plate 8 moves up and down the side part of the plug blade 31, and in particular, the locking claw piece 28 moves up and down the side part of the plug blade 31.
1 is inserted into or escapes from the front side edge 34 of the plug base 33.
That is, as shown in FIGS. 3 and 4, the switch plate 8
is moved upward and turned on, the locking pawl 28 is positioned to engage with the side edge 34 of the plug base 33. Therefore, even if an attempt is made to push out the charging plug 4, it cannot be pushed out due to the abutting engagement between the locking claw piece 28 and the end edge 34 on the plug base side. However, when the switch plate 8 is pushed down to turn the switch OFF, the locking pawl 28 retreats to the lower part of the plug base 33 as shown in FIG. 5, and the engagement with the plug base side edge 34 is released. Therefore, the charging plug 4 can be slid and protruded.

To describe the relationship between the structure of the present invention and the thinning of the main body case 1, only the switch plate 8 is lined up in the thickness direction of the main body case 1, and the printed circuit board 2 is
1 and the short-circuiting contact piece 12 are arranged at right angles, and as in the conventional case, the short-circuiting contact piece is stacked on the switch plate 8, and switch parts such as a printed circuit board are superimposed on this switch plate 8 in the thickness direction of the main body case. Since they are not lined up, the switch parts can be incorporated even if the main body case 1 becomes extremely thin, and the thickness can be sufficiently reduced. When the switch knob 7 is slid upward, the switch plate 8 moves upward, and the circuit section on the printed circuit board 21 is turned on by the shorting contact piece 12, thereby driving the motor and the like. At this time, the articulating protrusion 27
passes over the central constriction 19 and comes to the lower part of the slotted hole 20, and in this movement process gives the switch plate 8 an articulating action. Also, the locking pawl 28 at the lower end of the switch plate 8 is attached to the side edge 34 of the plug base 33 as shown in FIG.
This creates a locked state that prevents the charging plug from protruding when the switch is turned on. When pushing out the charging plug 4 for charging, be sure to push down the switch plate 8 and release the switch plate.
Must be turned OFF. When the switch plate 8 is pushed down, its downward movement is articulated by the elastic split slot 20 and the articulation protrusion 27 in the same way as when it is turned ON.
As shown in FIG. 5, the locking claw piece 28 escapes to the bottom of the plug base 33 so that it does not interfere with the sliding of the plug 4. Therefore, the plug blades 31, 31 can be freely protruded, and can be charged by inserting the plug blades 31, 31 into a power outlet.

As described above, according to the present invention, the switch plate, which is operated by sliding up and down along the inner surface of the main body case, is provided with a wall portion for mounting the switch contact piece that stands upright in the perpendicular direction, that is, in the thickness direction of the main body case. Since the switch structure has a printed circuit board mounted on the inner surface of the main body case in close opposition to this wall portion to which the shorting contact is attached, only the switch plate is lined up in the thickness direction of the main case. The shorting contact piece and printed circuit board do not overlap with the switch board, and even if the thickness of the main body case is made very thin, the internal space can be used effectively and enough switch parts can be incorporated.
This makes it possible to make the entire small electrical device thinner and lighter. Conventionally, the switch plate and short-circuit contact printed circuit board were built-in in a laminated structure, which made it difficult to make the case smaller in the thickness direction, and it was not possible to make the case sufficiently thin. The present invention easily solves this problem. In addition, the switch plate is provided with an elastic slotted hole in which the articulation protrusion on the inner surface of the main body case is fitted to ensure its vertical movement. By providing a locking piece that disengages the insertable charging plug and allows it to slide out, it provides a mechanism that ensures reliable switch operation and prevents charging errors caused by leaving the switch ON. can. Further, it has practical effects such as being able to provide both of these functions to the switch plate with a simple structure and achieving it with a reduced number of parts.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a sectional view of the main parts when the invention is applied to a vibrating electric shaver, Fig. 2 is an exploded perspective view of the components, and Fig. 3 is a diagram showing the structure of a switch plate. FIG. 4 is a structural diagram of the main parts when the charging plug is locked, and FIG. 5 is a structural diagram of the main parts when the charging plug is unlocked. 1...Main case, 8...Switch board, 8'...
...Middle part, 11...Wall part, 12...Short-circuit contact piece, 2
1... Printed circuit board, 27... Articulation protrusion, 20
...Elastic split groove hole, 28...Lock claw piece.

Claims (1)

[Scope of utility model registration request] A switch plate is provided that is slidable up and down along the inner surface of the box-shaped main body case, and a wall portion for mounting a switch contact piece that stands upright in the thickness direction of the main body case is provided approximately in the middle of the switch plate. , a small electric device having a short-circuiting contact attached to one side of the wall portion and a printed circuit board fixed to the inner surface of the main body case in close opposition to the wall portion; An elastic split groove for articulation is provided which fits into the articulation protrusion provided on the switch plate, and an elastic groove hole for articulation is provided at the lower end of the switch plate so as to be slidable on the inner bottom of the main body case when the switch plate is operated in the OFF direction. A switch device for a small electrical device, which is integrally formed with a locking claw piece that disengages a charging plug from a plug base and allows the plug to slide and protrude out of the main body case.