JPS5816914B2 - Reciprocating electric razor blade attachment device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blade attachment device for a reciprocating electric shaver, and its main purpose is to bring the comb teeth of a fixed blade and a movable blade into elastic contact with each other with an appropriate spring force. The aim is to improve cutting quality and reduce costs by reducing the number of parts.

Conventionally, the fixed blade 4 and movable blade 6 of this type of electric shaver are equipped with a push-up spring 1 attached to a blade mount 1 as shown in FIG.
0 are pressed against the movable blade 6, so that they are in elastic contact with each other, so the operating position of the push-up spring 10 cannot be positioned closer to the blade edge than the blade groove of the comb teeth 7 of the movable blade 6, and the movable blade 6
The force to push up the comb teeth 7 of the fixed blade 4 against the comb teeth 5 of the fixed blade 4 was weak, resulting in poor cutting quality (and there was a risk that the bristles would be pushed up and caught in the spring).

The present invention has been made in view of the above points, and will be explained in detail below using Examples.

The movable blade 6 is formed of a plate material having spring properties, and has both side edges in the width direction bent in the same direction to form comb teeth 7 in a part that is one step higher in the surface direction than the center part.

The blade mount 1 has a pair of wings 11 extending diagonally upward on both sides from the center, and a cylindrical boss 2 with an upward opening protrudes from the top of the center, and further extends from the top of the blade mount 1 on both sides of the boss 2. A pair of presser protrusions 3 are formed to protrude.

The fixed blade 4 has comb teeth 5 formed on higher protruding parts at both edges in the width direction facing the blade mounting base 1, and a small diameter part 13 at the tip of the boss 2 is inserted into the mounting hole 12 provided in the center. The periphery of the mounting hole 12 is clamped between the bosses 2 with 150 fixing pins 16 inserted into the shaft hole 14 of the boss 2, and fixed to the blade mount 1.

The movable blade 6 is attached by loosely fitting the boss 2 into a through hole 8 provided in the center between the fixed blade 4 and the blade mount 1, and the comb teeth I on both side edges are connected to the comb teeth of the fixed blade 4. The presser protrusions 3 on both sides of the boss 2 push up the movable blade 6, resulting in the comb teeth 7 on both side edges.
The movable blade 6 comes into elastic contact with the comb teeth 5 of the fixed blade 4 due to the spring force of the movable blade 6.

As described above, since the movable blade 6 presses the comb teeth 7 at the side tip against the comb teeth 5 of the fixed blade 4 using the spring force generated by itself, the movable blade 6 presses the comb teeth 7 at the side tip against the comb teeth 5 of the fixed blade 4. Spring force can be effectively applied to the sliding part of the blade, improving cutting quality and eliminating the need for the conventionally used push-up springs, reducing the number of parts and reducing costs. It is something that can be done.

A blade attachment device constructed in this manner is used, for example, in an electric shaver A for shaving the face as shown in FIG.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing a conventional example, Fig. 2 is a perspective view showing an embodiment of the present invention, Fig. 3 is a sectional view taken along the line X-X in Fig. 2, and Fig. 4 is a movable It is a partial perspective view showing a blade, and 1 is a blade mounting base, 2 is a boss, 3 is a presser projection, 4 is a fixed blade, 6 is a movable blade, and 8 is a through hole.

Claims (1)

[Claims] 1. A blade mounting base with a boss protruding from the center in the width direction, a flat plate-shaped fixed blade fixed to the tip of the center boss in the width direction and having a comb edge on the side edge, and a plate molded from a material with spring properties. A boss is loosely fitted into the central transom in the width direction of the blade, and the comb teeth on the side edge are slidably in contact with the comb teeth of the fixed blade along the longitudinal direction, thereby connecting the fixed blade and the blade mounting base. A reciprocating electric machine characterized by comprising a movable blade placed between the boss and a presser protrusion that protrudes from the blade mounts on both sides of the boss in the same direction as the boss and presses the movable blade against the fixed blade with its tip. Razor blade attachment device.