JPS594612Y2 - reciprocating electric razor - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a reciprocating electric shaver, and includes a movable blade and a fixed blade that are molded from the same thin substrate and integrally connected by a band-shaped connecting piece. To provide a reciprocating electric shaver which has a simple structure, is easy to manufacture, and has improved sharpness by bending it into a curved shape and polymerizing it.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a main body case that houses a battery and a motor (not shown).A blade holder 3 is attached to the top 2 of this main body case 1, and an outer blade 4 is attached to the blade holder 3. It is set up.

Reference numeral 5 denotes an inner cutter that is inscribed in the outer cutter 4 and constitutes a main cutter 6 together with the outer cutter 4.

Reference numeral 7 designates a pivot provided upright on the inner wall of the main body case 1, 8 indicates a main vibration rod pivotally supported on the pivot 7, and a cam receiving portion formed at the base end of the main vibration rod 8. 9 is fitted with an eccentric cam 11 fixed to the rotating shaft 10 of the motor, and the rotational force of the motor is converted into reciprocating motion by the main vibrating rod 8, and the eccentric cam 11 is connected to the tip of the vibrating rod 8. The power is transmitted to the inner cutter 5 via the connecting rod 12.

Reference numeral 13 denotes a sub-vibrating rod which is arranged in parallel with the main vibrating rod 8 and is swingably supported on the pivot shaft 14. A long hole 16 is formed into which a pin 15 protruding from the portion is fitted.

Reference numeral 17 denotes a window portion formed in the main body case 1, and this window portion 17 has a front edge driven by the auxiliary vibration 13 via a retaining member 18 fixed to the tip of the auxiliary vibration rod 13. A razor blade block 19 is provided.

This razor blade block 19 has movable and fixed blades 20
．． 21, a guide pin 22 of the movable blade 20, etc.

The movable blade 20 and the fixed blade 21 are molded onto a base plate 23 such as a thin stainless steel plate shown in FIG.

That is, as shown in FIGS. 3 and 4, the thin substrate 23 has a movable blade and a fixed blade 20.21, and an elastically deformable blade that connects the base ends of the movable and fixed blades 20.21. The band-shaped connecting piece 24 is integrally formed by press working or etching.

In this case, since the roll rolling direction of the thin steel plate is set in the direction of arrow P in FIG. 3, the roll rolling direction coincides with the longitudinal direction of the connecting piece 24, so that the elastic deformation force described above is effectively applied.

The movable blade 20 includes a comb blade portion 25 and the guide pin 2.
A long hole 26, 26 that fits into the tip of the comb 2, an engagement hole 27 that engages the engagement member 18, and the like are formed, and the comb blade portion 25 is bent into a stepped shape.

The fixed blade 21 is formed with a comb blade part 28 and a through hole 29 through which the guide pin 22 passes, and the comb blade part 28 is formed in a stepped shape.

The connecting piece 24 is bent into a U-shape as shown in FIG. Polymerized so that they touch each other.

As described above, since the movable blade 20 and the fixed blade 21 are integrally formed from the same thin substrate 23, the manufacturing process is simplified, and when molding the movable blade 20 and the fixed blade 21, both 20. 21 is an elastically deformable band-shaped connecting piece 24
Since the edge razor blade block 19 is integrated with the other parts, assembly of the edge razor blade block 19 is facilitated.

In particular, while fixing the fixed blade 21 to the inner wall of the window 17, the engaging member 1 is inserted into the engaging hole 27 of the movable blade 20.
8 is locked and the movable blade 20 is reciprocated in the direction of the arrow a in FIG. As a result of the connecting piece 24 being elastically twisted at this position as shown in FIG. 6, this twisting reaction force (white arrow F) assists the return movement of the movable blade 20.

Therefore, compared to the conventional configuration in which the movable blade is reciprocated by the vibrating force of only the vibrating rod, the return movement of the movable blade 20 is accelerated and the cutting edge becomes sharper.

Particularly in this case, the above-mentioned torsional reaction force F generated on the movable blade 20
This occurs with respect to the fixed blade 21, so even if there is wobbling of the fixed blade, which occurs when the fixed blade and movable blade are separated and only the movable blade side is elastically returned, as in the conventional case, The fixed blade follows the movable blade and the range affected by the restoring force does not decrease, and the torsional reaction force F is effectively utilized in the shearing range, thereby promoting warpage.

Further, in this case, the conventionally used compression spring for press-contacting the movable blade 20 to the fixed blade 21 is not particularly necessary because the elastic force can be applied by the U-shaped curved shape of the connecting piece 24, but the movable blade 20 and the fixed blade 21 to be integrally connected and molded, or if the base material itself has weak elasticity, a compression spring may be used, which may adversely affect the torsional reaction force F. It will not extend.

Furthermore, hair debris between the movable blade 20 and the fixed blade 21 can be easily removed.

In this embodiment, the torsional reaction force F can be arbitrarily selected and set by changing the width of the connecting piece 24.

7 and 8 show other embodiments, in which the connecting piece 2
4 is bent into an Ω shape.

In this case, the same effects as in the above embodiment are achieved, and the adhesion between the comb blade portion 25 of the movable blade 20 and the comb blade portion 28 of the fixed blade 21 becomes even more stable.

Of course, it is preferable that the rolling direction is set in the direction P in FIG. 7.

9 and 10 show still another embodiment, in which the movable blade 20 and the fixed blade 21 are molded upside down with respect to the other side as shown in FIG. 9, and the connecting piece 24 is bent. At the same time, either the movable blade 20 or the fixed blade 21 is twisted once and overlapped with the other side, and although there is a twisted part 30 in the connecting part 24, the circular motion of the movable blade 20 is easily performed. can be set.

In this case, since the intermediate portion of the twisted portion 30 is bent in a direction perpendicular to the direction of reciprocating motion of the movable blade 20, this intermediate portion becomes the center of the reciprocating circular arc motion of the movable blade 20 and the fixed blade 21. The trajectory deviation of each comb blade part 25.2B can be eliminated,
The shearing scissor angle set on each comb blade portion 25.2B can be maintained constant, and the warp quality can be improved.

In addition, when moving the movable blade 20 in a linear reciprocating manner, the 11th
As shown in the figure, each comb blade 2 of the movable and fixed blades 20.21
The movable blade 20 and the fixed blade 21 may be connected by a connecting piece 24 at one side along the arrangement direction of 5.2B.

As described above, this invention integrally forms the movable and fixed blades and the elastically deformable connection piece that connects them from the same thin substrate, and bends the connection piece to hold the movable blade in sliding contact with the fixed blade. By doing so, it is possible to provide a reciprocating electric shaver that has a simple structure, is easy to manufacture, and can accelerate the return movement of the movable blade to improve sharpness.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an example of a reciprocating electric shaver according to this invention, FIG. 2 is a sectional view of a thin base, FIG. 3 is a plan view showing a movable blade and a fixed blade, and FIG. XX in figure 3
A line sectional view, FIG. 5 is a perspective view showing a movable blade and a fixed blade, FIG. 6 is an explanatory view of the same operation, and FIGS. 7 and 8 are a sectional view and a perspective view showing modifications of the same essential parts, respectively. , 9 and 10 are perspective views showing another modification of the same essential part before and after bending the connecting piece, respectively, and FIG. 11 shows still another modification of the same essential part. FIG. 20...Movable blade, 21...Fixed blade, 2
3... Thin base, 24... Connecting piece, 2
5.28... Comb blade part.

Claims (1)

[Scope of utility model registration request] The movable blade 20 and the fixed blade 21 as well as the elastically deformable band-shaped connecting piece 24 that connects the movable blade 20 and the fixed blade 21 are integrally formed from the same thin substrate 23, and the connecting piece 24 is bent into a curved shape. A reciprocating electric shaver in which the comb blade part 25 of the movable blade 20 is held in slidable contact with the comb blade part 2B of the fixed blade 21.