JPS6233704B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charger built into or attached to a small electric appliance such as a rechargeable electric shaver.

Conventionally, chargers used for rechargeable electric razors had the protrusion of the plug blade for connecting the power source exposed to the outside, so dust could enter through this protrusion and cause damage to the switch and the sliding piece of the plug blade. There was a problem with poor contact.

The present invention has been made in view of the above-mentioned drawbacks.
The purpose of this is to provide a charger that eliminates poor contact by preventing the protrusion of the plug blade from being exposed to the outside when the charging block is stored inside the main case, and preventing dust from entering the main case. be.

The present invention will be explained below using an example in which the present invention is applied to a rechargeable electric shaver. Reference numeral 1 denotes a main body case made of a synthetic resin molded product, which also serves as the main body of the electric shaver.A rotating razor blade block 2 is attached to the upper end, and a charging block 3 is provided to the lower end. Furthermore, a rechargeable battery 4 such as a Ni--Cd storage battery is housed inside the center. Main case 1
The lower end surface is open, and a box-shaped lower cover 6 is housed in this opening 5 and attached so as to be able to protrude freely.A charging transformer 7 is attached to the upper surface of the lower cover 6 by adhesive or the like. The board 8 electrically wired is fitted,
A current-carrying spring 10 is mounted parallel to the lower surface of the board 8.
10, and on ribs 11, 11 protruding from the inner bottom of the lower cover 6, plug blades 13, 13 for power connection, whose rear ends are fixed with an insulating member 12 and are attached parallel to the front, slide. It is arranged so that it can move freely. An operating portion 14 is provided on the side surface of the insulating member 12, and this operating portion 14 penetrates from the inside to the outside into a horizontally elongated hole 9 bored in the side surface of the lower cover 6. When sliding in the direction, the plug blade 1
3 and 13 are projecting openings 1 of the plug blades 13 and 13 that slide on the ribs 11 and 11 and are opened at the end surface of the lower cover 6.
5 and 15 to protrude outside the lower cover 6 or to be housed within the lower cover 6. The upper end surfaces of the rear portions 13a, 13a of the plug blades 13, 13 are adapted to come into sliding contact with the free ends of the energizing springs 10, 10 when the plug blades 13, 13 advance toward the protrusion ports 15, 15. The energizing springs 10, 10 are connected to the holes 8 of the substrate 8.
a, 8a through which the rear end vertical pieces 10a, 10a are passed from below to above, and a rib 8b provided in the center of the substrate 8;
The holes 10b and 10b are fitted into the holes 10b and 10b, respectively, and the input side terminals of the charging transformer 7 are connected to the rear end vertical piece 1.
0a, 10a, and as mentioned above, the free ends of the energizing springs 10, 10 are connected to the plug blades 13, 10a.
13, the plug blades 13, 13 and the charging transformer 7 are electrically connected via the energizing springs 10, 10. By the way, charging transformer 7 and energizing spring 1
0 and 10 are attached as described above, the front and rear ends of the board 8 are fitted into the recesses 6b between the parallel ribs 6a and 6a provided on the inner wall surface of both ends of the lower cover 6, respectively, and fixed within the lower cover 6. However, the ribs 16, 16 protruding from the lower surface of both ends of the board 8 are connected to the ribs 11, 11 protruding from the inner bottom of the main body case 1, and the blades 13,
The insulating member 12 that fixes the plug blades 13, 13 is inserted to suppress the rattling of the plug blades 13, 13.
The sliding operation can be performed smoothly. Thus, the lower cover 6, the plug blades 13, and the charging transformer 7 constitute the charging block 3. On the other hand, an annular groove 17 is formed on the inner periphery of the opening 5 of the main body case 1.
A waterproof rubber ring 18 is fitted into this annular groove 17 to be in pressure contact with the outer peripheral surface of the lower cover 6. Furthermore, step walls 25a and 25b are provided at the lower part of the inner wall at both ends of the main body case 1, and a boss 19 is provided protruding from the inner wall surface above the step wall 25a at one end.
The contact fitting 20 is attached by inserting the hole 20a of the contact fitting 20 into and heat sealing.
Further, below the mounting position of this contact metal fitting 20, a recess 22 for housing a movable contact metal fitting 21 that comes into contact with and releases from this contact metal fitting 20 is formed on a step wall 25a.
A boss 2 provided at the upper end of the box and protruding into this recess 22
3 is inserted into the hole 21a of the movable contact fitting 21 and heat-sealed, thereby fixing the lower end of the movable contact fitting 21. The free end of the movable contact fitting 21 springs laterally and is separated from the opposing surface of the contact fitting 20. When pushed from the surface, the free end comes into contact with the contact fitting 20, and the contact The metal fitting 20 constitutes an interlocking switch 24, which will be described later.

However, when storing the charging block 3 through the opening 5 of the main body case 1, the plug blades 13, 13 are stored in the lower cover 6, and when the lower cover 6 is pushed upward in this state, the synthetic resin molded product is removed. Due to the elasticity of a certain lower cover 6, the ribs 27, 27 protruding from the upper outer surface of both ends of the lower cover 6 are bent inward, and can be stored in the main body case 1 by sliding on the stepped walls 25a, 25b. become. FIG. 3 shows the lower cover 6 completely housed in the main body case 1, and at this time the ribs 27, 27 are located on the tapered surfaces 28, 28 formed at the upper ends of the stepped walls 25a, 25b. become. In this case, the rib 27 of the lower cover 6 rides on the surface of the movable contact fitting 21 and pushes the inclined portion 21b of the movable contact fitting 21, and the free end of the movable contact fitting 21 comes into pressure contact with the surface of the contact fitting 20 to turn on the switch. The interlocking switch 24 is turned on in conjunction with the storage operation of the lower cover 6, and as shown in FIG.
The output of the battery 4 to be charged can be connected to the load side when turned on.

Now, to project the charging block 3, hold the knob 26 provided on the side surface of the lower cover 6 with your hand and pull it downward.
The step walls 25a, 2 are formed by the tapered surfaces 28, 28.
5b and move downward, each step wall 25a,
When it reaches the recesses 29, 29 provided in the lower cover 25b, it falls down and the recesses 29 and the ribs 27 engage with each other, thereby restricting further protrusion of the lower cover 6. Now, with the lower cover 6 protruding downward from the opening 2 of the main body case 1, insert the operation part 14 into the horizontally elongated hole 9.
When the lower cover 6 is slid in the direction of the projection openings 15, 15, the plug blades 13, 13 of the lower cover 6 will protrude laterally from the projection openings 15, 15. At this time, as shown in FIG. 4, the free end of each energizing spring 10, 10 is
Sliding contact with the upper surface of the rear part 13a, 13a of 3, 13,
When the plug blades 13, 13 are connected to the power outlet,
A power source is connected to the input terminal of the charging transformer 7 via the plug blades 13, 13 and the energizing springs 10, 10,
The battery 4 to be charged is charged by the secondary output of the charging transformer 7 via the diode 30 . Also, at this time, the rib 27 of the lower cover 6
1, the interlocking switch 24 is turned off, and even if the operation switch 31 is turned on, the motor M is not supplied with power from the battery 4 to be charged and does not rotate.

Now, when charging is finished and you want to use the electric razor, operate the operating section 14 to open the blades 13 and 1.
3 is stored in the lower cover 6, and when the lower cover 6 in this stored state is pushed upward, the upper end inclined surface of each rib 27, 27 of the lower cover 6 moves upward along the inclined surface of the recesses 29, 29. When it comes out of the recesses 29, 29 and reaches the upper ends of the stepped walls 25a, 25b, the elasticity of the lower cover 6 causes the ribs 27, 27 to move along the tapered surfaces 28, 28 from the stepped walls 25a, 25b to the main body. Move onto the inner wall surface of case 1 and press one rib 2.
7 climbs onto the movable contact fitting 21 and pushes it toward the inner wall surface of the main body case 1, bringing the free end into contact with the contact fitting 20. This contact turns on the interlock switch 24, and when the operation switch 31 is turned on, the electric shaver becomes ready for use. When the lower cover 6 is stored in the main body case 1, the lower cover 6
The bottom surface of the main body case 1 is substantially flush with the opening surface of the opening 2 of the main body case 1, thereby closing the opening 2. At this time, since the rubber ring 18 is in contact with the outer peripheral surface of the lower cover 6, the inside of the main body case 1 is sealed from the outside air, thereby preventing dust, water, etc. from entering through the gap. In the figure, 33 is a lead wire that connects the charging transformer 7 and the battery to be charged 4, and a diode 30 is connected in series in the middle of this lead wire 9. Further, numeral 32 in the figure is a recess provided in the main body case 1 into which the knob 26 is fitted.

In addition, a spring is provided at the rear of the plug blades 13, 13,
When the lower cover 6 protrudes outside the main body case 1, the plug blades 13, 13 may automatically protrude from the protrusion openings 15, 15.

In the present invention, an opening is provided at one end of the main body case, and a lower cover is provided on the main body case that protrudes from the opening and can be freely stored.The lower cover includes a charging transformer and a plug blade for connecting to a power source. In addition to providing a charging block, the blade for connecting the power source can be moved in and out from the side of the bottom cover, so when not charging, the bottom cover containing the blade can be stored inside the main case, allowing the blade to protrude. This has the effect that the opening is not exposed to the outside, preventing dust from entering through the protruding opening, and preventing poor contact of the current-carrying parts due to dust.

In addition, the output from the battery to be charged is turned on in response to the movement of the lower cover into and out of the main body case.
If equipped with an interlocking switch that turns off, it will prevent forgetting to store the charging block due to the load not being able to be driven.
This prevents dust from entering the charging block due to forgetting to store it.

Furthermore, a rib is provided protrudingly on the outer surface of the tip of the lower cover in the main body case, and a step wall is provided on the inner surface of the main body case on which the rib rides and slides when the lower cover is projected from the main body case. The step wall is provided with a recess that engages with the rib in a manner that allows the lower cover to engage and disengage freely at a position where the lower cover protrudes from the main body case by a predetermined amount, so that a click feeling is provided when the lower cover is inserted or removed from the main body case. is,
The protruding position of the lower cover can be determined by engagement between the upper recess and the rib. Moreover, the mounting position of the interlocking switch is set so that when the lower cover is stored in the main body case, the rib that descends from the stepped wall pushes the movable contact fitting of the interlocking switch, turning on the interlocking switch. So,
The rib functions to provide a click feeling as described above, and also serves as the operating section of the interlocking switch.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a rechargeable electric shaver using an embodiment of the present invention, FIG. 2 is a partially omitted perspective view showing the protruding state of the same charging block, and FIG.
The figure is a partially cutaway front view of the same as the above, Fig. 4 is a cross-sectional view of the same as the above when the charging block is protruded, Fig. 5 is a side sectional view of the same as the above that can be partially omitted, and Fig. 6 is the same as the above. Fig. 7 is a partially cut-away perspective view of the charging block, Fig. 8 is an explanatory diagram of the assembly of the interlocking switch part, and Fig. 9 is an exploded perspective view of the main body case, which can be omitted. In the circuit diagram, 1 is a main body case, 3 is a charging block, 4 is a battery to be charged, 5 is an opening, 6 is a lower cover, 7 is a charging transformer, and 18 is a waterproof rubber ring.

Claims (1)

[Claims] 1 An opening is provided at one end of the main body case, and a lower cover is provided on the main body case that protrudes from the opening and can be freely stored in the main case, and the lower cover has a charging block consisting of a charging transformer and a plug blade for connecting to a power source. In addition, a plug blade for power connection is provided so that it can be moved in and out from the side of the lower cover, and an interlocking switch is provided that turns on and off the output from the battery to be charged in response to the operation of the lower cover to store or protrude from the main body case. In the charger, a rib is provided protruding from the outer surface of the tip of the lower cover in the main body case, and a step wall is provided on which the rib rides and slides when the lower cover is projected from the main body case. A recess is provided on the inner surface of the main body case and is provided in the stepped wall to engage with the rib in a freely engaging and disengageable manner at a position where the lower cover protrudes from the main body case by a predetermined amount, so that the lower cover is inserted into the main body case. The mounting position of the interlocking switch is set so that the rib that descends from the step wall pushes the movable contact fitting of the interlocking switch to turn on the interlocking switch when the charger is stored.