JPH0431027Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an electric razor in which either the main blade or the trimmer blade is selectively driven by the same drive source.

(Background Art) Conventionally, in a rotary electric razor or the like equipped with a trimmer blade as well as a main blade, a driver 43 is press-fitted into an output shaft 42 of a motor 41 as shown in FIG. 11A.
A coupling ring 45 is provided which is fixed and connected to the main knife 44 consisting of an outer cutter 44A and an inner cutter 44B and which can move forward and backward in the direction of the output shaft 42. A convex portion 45a formed on the lower surface of the coupling ring 45
The rotation of the output shaft 42 and the drive element 43 is transmitted to the coupling ring 45 and the inner cutter 44B by engaging the drive element 43 with the recess 43a of the drive element 43.

Switching between the main blade 44 and the trimmer blade (not shown) is performed using a slide plate 46 as shown in FIG.
By sliding inward, the lower end of the coupling ring 45 is pushed up, and the convex part 45a and the concave part 4
3a so that the rotation of the output shaft 42 is not transmitted to the main blade 44, and in this state, the driver 43 is connected to the trimmer blade by appropriate means to drive the trimmer blade. It's summery.

However, in this electric razor, either the main blade 44 or the trimmer blade is always connected to the driver 43 depending on the position of the slide plate 46, so when the switch is turned on, the main blade 44 is not always driven. In some cases, the trimmer blade may be driven, and in particular, it is extremely dangerous if the trimmer blade protruding from the main body is driven carelessly.

(Purpose of the invention) The present invention was proposed in view of the above points, and its purpose is to connect the driver that drives the main blade or trimmer blade to the main blade during normal times,
When the motor drive switch is turned on, the main blade is always driven, and the driver is forcibly connected to the trimmer blade only when the switching operation section is operated, thereby preventing the trimmer blade from being started accidentally. An object of the present invention is to provide an electric razor which prevents the above and improves safety.

(Disclosure of the invention) The invention will be explained below with reference to the drawings. Figures 1 to 10 show an embodiment of the present invention.
First, in FIGS. 1 and 2, 1 is a casing, and a motor 2 is housed inside the casing. A driver 4 is connected to the output shaft of the motor 2 via an eccentric cam 3. More specifically, as shown in FIG. 3, the driver 4 includes a pair of bendable, approximately U-shaped bending portions 5, which are connected to the eccentric cam 3 at a connecting portion 6 formed approximately in the center, and connected to the eccentric cam 3 by a connecting portion 6 formed approximately in the center. The central portion 8 between the parts 7 is capable of reciprocating. Also,
A bush coupling part 10 with a hole for housing a push-up spring 9 (see Figs. 1 and 2) is protruded from the upper surface of the central part 8, and a trimmer drive part is provided on the front surface of the central part 8. A boss 11 is provided vertically.

The driver 4 is integrally fixed to a substantially U-shaped slide plate 12 via a fixing portion 7. A pair of bendable legs 13 are formed on both sides of the lower end of the slide plate 12. On the inside of these legs 13, there are tapered edges 13a that become narrower toward the driver 4. It is formed. Further, as shown in FIG. 4, a switching operation section 14 is provided protruding from the back surface of the slide plate 12. As shown in FIG. 2, the slide plate 12 is disposed between mounting frames 15 formed on the inner surface of the casing 1 and can be moved up and down. window 1a (see Figure 1)
It is starting to protrude from the Furthermore, a pair of regulating protrusions 16 that abut against the tapered edge 13a of the slide plate 12 are provided to protrude from the inner surface of the casing 1.

Again in FIGS. 1 and 2, 17 is an outer cutter, and inside this outer cutter 17 there are provided a plurality of inner cutters 19 arranged in a row on a base 18, and these inner cutters 19 are connected to the outer cutter. It slides back and forth on the inner surface of the blade 17. Here, the outer cutter 17 and the plurality of inner cutters 19 constitute a main cutter 20 . Further, a bush 21 is integrally attached to the center portion of the lower surface of the base 18, and this bush 21 is fitted into the bush coupling portion 10 via a push-up spring 9.

On the other hand, a trimmer blade 22 is provided on the front side of the casing 1.
is installed. In other words, this trimmer blade 22
As shown in FIG. 5, a trimmer movable blade 24 and a trimmer fixed blade 25 are housed inside a holder 23, and the trimmer movable blade 24 has an engagement hole 24a that engages with the trimmer drive boss 11 described above. is bored in the holder 23, and an engagement hole 24 is formed in the holder 23.
A through hole 23a communicating with a is bored.

Further, in FIG. 1, a storage battery 26 is disposed below the motor 2, and a charging circuit 27 for charging the storage battery 26 is provided. A resilient shield terminal 29 is connected to the negative terminal of the board 28 of the charging circuit 27 as shown in FIG. It is in contact with the plate 31. This shield plate 31 is for reducing noise etc. generated from the charging circuit 27, and the entire charging circuit 27 and the shield plate 31
An insulating plate 32 is interposed to maintain insulation between the two. In addition, as shown in Fig. 1, the casing 1
A switch handle 33 for turning the motor 2 on and off is attached to it.

Note that FIGS. 7 and 8 show the appearance of the electric razor according to the present invention.

Next, this operation will be explained. First, under normal conditions, the slide plate 12 is in the position shown in FIGS.
It is connected to the main blade 20 via. Therefore, when the switch handle 33 is turned on, the motor 2 rotates, the main cutter 20 is driven via the eccentric cam 3 and the driver 4, and the inner cutter 19 is moved by the push-up spring 9 to the outer cutter 17.
It slides back and forth while being pressed against the inner surface of. At this time, no driving force is transmitted to the trimmer blade 22, and the trimmer blade 22 does not operate.

Next, when using the trimmer blade 22, press the switching operation part 14 downward and the slide plate 12
is lowered, and as shown in FIG. 10, the leg portions 13 are pushed outward by the action of the tapered edge 13a that is in contact with the regulating protrusion 16, and at the same time, the leg portions 13 and the slide plate 12 are exposed upwardly. The resilience to move is accumulated. At this time, as shown in FIG.
4a, the main blade 20 is separated from the driver 4 because the bushing coupling part 10 and push-up spring 9 are separated from the bushing 21, and the rotation of the motor 2 when the switch handle 33 is turned on is transmitted to the trimmer via the driver 4. The signal is transmitted only to the movable blade 24, and a trimmer operation is performed between the movable blade 24 and the trimmer fixed blade 25.

This trimmer operation continues only while the switching operation part 14 is forcibly pressed downward. When this pressing is released, the restoring force of the legs 13 or the slide plate 12 causes the driver 4 to return to the main position. It is connected to the blade 20 side so that only the main blade 20 can be driven.

(Effects of the invention) As described above, according to the invention, in an electric razor in which either the main blade or the relimer blade is selectively driven by the same driver, the main blade is always driven by the biasing force. Since the connected drive element is configured to be separated from the main blade by following the switching operation section and forcibly connected to the trimmer blade, the switch handle cannot be turned on unless the switching operation section is operated. The main blade is driven at all times, and there is no inconvenience that would normally occur if a trimmer blade with an exposed cutting edge is driven carelessly, and safety can be greatly improved.

Furthermore, since the load on the driver is always on either the main blade or the trimmer blade, the load on the motor is relatively small, resulting in low power consumption.

[Brief explanation of the drawing]

1 to 10 show an embodiment of the present invention, in which FIG.
3 is a perspective view of the drive element and slide plate, FIG. 4 is a perspective view of the slide plate, FIG. 5 is a sectional view of the trimmer blade, and FIG. 6 is a sectional view of the main parts. , FIGS. 7 and 8 are perspective views showing the external appearance, FIGS. 9 and 10 are sectional views showing the operating state, and FIGS. 11A to 11C are sectional views of main parts showing a conventional example. 4...driver, 12...slide plate, 13...
Leg part, 14... Switching operation part, 20... Main blade, 22
...trimmer blade.

Claims (1)

[Scope of utility model registration request] In an electric razor in which either the main blade or the trimmer blade is driven by the same drive source by a driver, the driver is energized to transmit driving force to the main blade, and the drive transmission of this driver a switching operation section for switching from the main blade to the trimmer blade, this switching operation section has a slide plate integrated with the driver, this slide plate has a pair of legs with tapered edges formed at the ends, The slide plate applies a biasing force to the driver due to the restoring force applied to the legs, and by pushing down and deforming the slide plate, the driving force from the driver is transmitted to the trimmer blade. An electric razor featuring