JPS588277B2 - electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver having a sideburn shearing section.

Conventionally, there are devices in which a fixed blade and a movable blade are attached to a sideburn blade holding plate using screws or nuts, but the work is cumbersome because the screws must be tightened at multiple locations.

In addition, the movable blade must be brought into pressure contact with the fixed blade by a spring, but when tightening with screws, it is difficult to set the set height of the spring, resulting in disadvantages such as the movable blade not operating smoothly or cutting sharply. have.

The object of the present invention is to provide an electric shaver that can eliminate the above-mentioned drawbacks.

This invention houses a slide frame integrally formed with an auxiliary frame that is connected to an operating section and slides and a sideburn blade holding plate in a main body case that houses a drive section that drives a shaving section, and the slide frame , between the sideburn blade holding plate and the fixed blade, a boss that holds the movable blade slidably in the longitudinal direction with the movable blade in pressure contact with the fixed blade, a boss that positions the fixed blade, and a flexible A flexible locking piece that engages with the fixed blade and presses the fixed blade against the pressing force of the movable blade is integrally formed.

Therefore, by bending the flexible locking piece outward, the fixed blade and the movable blade are overlapped and fitted into the boss, and the movable locking piece prevents them from coming off. Although the blade is pressed against the fixed blade, the dimensions of the flexible locking piece remain unchanged, so the relative dimensions of the sideburn blade holding temporary and the fixed blade in the opposing direction are kept constant, which improves the operation of the movable blade. It is designed to improve sharpness.

An embodiment of this invention will be described based on the drawings.

Although only a portion of the case 1 shown in FIG. 1 is shown, it is a main body case that can be divided into two parts in the longitudinal direction, and a switch knob 2 is provided on the front surface of this main case 71 so as to be movable up and down.

Further, the main body case 1 houses a motor mount 3 for holding a motor 4 serving as a drive section, a slide frame 5, and an inner blade 7 of a shaving section 6.

This inner cutter 7 engages with a pin 9 of an eccentric cam 8 driven by the motor 4 and reciprocates in a linear direction.

The motor mounting base 3 has a rotatable lever 11 that engages with the protrusion 10 of the switch knob 2 in the latter half of the upward movement and rotates to press the front line of the slide frame 5 toward the rear. installed on.

Next, as shown in FIG. 4, a frame-shaped guide 12 is formed on the motor mounting base 3 to hold the slide frame 5 so as to be slidable in the front and rear directions.

The slide frame 5 has a square frame shape, and has an auxiliary frame 13 that is U-shaped when viewed from above and a sideburn blade holding plate 14 that are integrally formed of elastic plastic.

Then, a boss-shaped projection 1 formed on the motor mounting base 3
5 and hooks 16 formed on both sides of the auxiliary frame 13 with a tension spring 17, as shown in FIG. 3, the slide frame 5 is urged forward.

Next, a fixed blade 19 and a movable blade 20 that constitute the sideburn shearing section 18 are provided.

These fixed blades 19 and movable blades 20 have comb blades 22 corresponding to horizontally long openings 21 formed on the rear surface of the main body case 1, as shown in FIG.

As shown in FIG. 4, two long holes 23 are formed in one movable blade 20, and fixed holes 24 corresponding to the long holes 23 are formed in the four fixed blades 19, and fixed holes 26 are formed in the legs 25. and a locking portion 27 formed by a notch.

Therefore, the sideburn blade holding temporary 14 has the elongated hole 23.
a large-diameter boss 28 that engages with the movable blade 20 to reciprocally hold the movable blade 20; a small-diameter boss 29 that is connected to these bosses 28 and engages with the fixing hole 24 of the fixed blade 19; A flexible locking piece 30 that presses the fixed blade 19 downward is formed.

Further, the auxiliary frame 13 has a fixing hole 26 for the fixed blade 19.
A stepped boss 31 that engages with the locking portion 27 and a locking portion 32 that is a protrusion that locks into the locking portion 27 are formed.

The scraping blade holding plate 14 is reinforced against warping by forming two bulging ribs 33 along its longitudinal direction.

Further, a spring 34 is provided which is inserted into the boss 28.

Next, the motor mounting base 3 is formed with a plurality of circular protrusions 35 that protrude upward.

A holding plate 39 is provided with mounting holes 36 that engage with these protrusions 35 and an opening 37 located at the center, and on which pins 38 are erected.

Still, the hole 40 engaging the pin 38 and the eccentric cam 8
A swinging lever 42 is provided, which has a long hole 41 that engages with the pin 9, and rotates back and forth about the pin 38 as a fulcrum.

A narrow groove 44 that engages with a pin 43 erected in the center of the movable blade 20 is formed at the tip of the swinging lever 42 and is connected to an enlarged opening 45 from the middle of the inward direction.

In such a configuration, first, the boss 2 of the slide frame 5
8, and with the flexible locking piece 30 pushed open outward, the elongated hole 23 of the movable blade 20 is inserted into the slide frame 5.
The fixing hole 24 of the fixed blade 19 continues to fit into the boss 28 of the fixed blade 19 .
26 into the bosses 29 and 31 of the slide frame 5.

Then, when you release your hand from the flexible locking piece 30, the flexible locking piece 30
returns inward due to its own elasticity and presses the fixed blade 19 to prevent it from coming off from the bosses 29 and 31.

After assembling in this way, the bosses 29,310 may be welded.

Then, the slide frame 5 is fitted into the guide 12 of the motor mounting base 3, and the mounting hole 36 of the temporary presser foot 39 is fitted into the protrusion 35.

Thereafter, the temporary presser foot 39 is prevented from coming off by attaching the protrusion 35 or attaching a retaining ring to the protrusion 35.

Next, the elongated hole 41 of the swing lever 42 is fitted into the pin 9 of the eccentric cam 8, and the hole 40 is fitted into the pin 38 of the temporary presser 39.

Further, the inner blade 7 of the shaving section 6 is fitted onto the pin 9 from above.

Although not shown, the inner cutter 7 is prevented from coming off upward by attaching an outer cutter to the upper end of the main body case 1, and a spring is interposed between the inner cutter 7 and the swinging lever 42 to prevent the inner cutter 7 from swinging upward. The moving lever 42 is prevented from coming off.

When the switch knob 2 serving as the operating section is slid upward, a switch (not shown) is turned on, the motor 4 rotates, and the rotation of the eccentric cam 8 causes the inner blade 7 of the shaving section 6 to reciprocate.

When the switch knob 2 is further slid upward, the motor 4 is still kept ON, but the lever 11 is pushed by the switch knob 2 and rotates, the slide frame 5 slides while bending the spring 17, and the fixed blade 19 A comb blade 22 of the movable blade 20 and the movable blade 20 protrude from an opening 21 of the main body case 1.

With this operation, the pin 43 of the moving blade 20 engages with the groove 44 from the enlarged opening 45 of the swing lever 42.

Therefore, sideburns are sheared by reciprocating the movable blade 20.

In this way, the sideburn shearing section 18 can be easily assembled without using screws or bolts.

The movement in the direction perpendicular to the reciprocating movement of the town moving blade 20 is caused by the boss 28.
is prevented by

The movement of the fixed blade 19 in the plane direction is reliably prevented by the engagement of the four bosses 29, 31 and the locking portions 27, 32, and the floating of the fixed blade 19 is pressed by the flexible locking piece 30, and further the boss 29. With 31 welded and not coming off, boss 2
9. It is firmly positioned by being in close contact with the step at the base of 31.

Therefore, the relative positions of the fixed blade 19 and the sideburn blade holding plate 14 in the opposing direction remain unchanged, the set height of the spring 34 and the accompanying compressive force remain constant, and the movable blade 20
The operation is smooth and the cutting quality is good.

The slide frame 5 is still attached to the auxiliary frame 13 and the sideburn blade retaining plate 1.
4, it is strong as a strength member, and since the ribs 33 are formed on the sideburn blade holding temporary 14, it has sufficient strength against warping.

In addition, the sliding auxiliary frame 13 and the sideburn blade retaining plate 14
Since the two are integrated, there is no conversion of motion or unnecessary transmission of motion between the two.

Thereby, the sharpness can be further improved.

Since this invention is configured as described above, the fixed blade and the movable blade can be easily assembled with only the boss and the flexible locking piece without using screws or nuts, and the fixed blade can be easily assembled by the pressure of the movable blade. The dimensions of the flexible locking piece that presses against the side-burning blade are different from the threading amount of the screw or nut and are unchanged, so the distance between the fixed blade in the opposite direction to the sideburn blade holding temporary is kept constant and the fixed blade of the moving blade is fixed. This allows the movable blade to operate smoothly and improve its cutting quality.Furthermore, the sideburn blade holding plate and auxiliary frame that hold the fixed blade and the movable blade can By integrally forming the
This has the effect of allowing both to operate integrally and smoothly and increasing the strength of the strength member, thereby providing even better cutting performance.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view showing the inside of the main body case in cross section, Fig. 2 is a rear view, Fig. 3 is a plan view, and Fig. 4 is an exploded perspective view. FIG. 5 is a perspective view showing the assembled state of the sideburn shearing section. 1... Main body case, 2... Switch knob (operation part), 4... Motor (drive part), 5... Slide frame,
6... Shaving section, 13... Auxiliary frame, 14...
・Sideburn blade holding plate, 19... fixed blade, 20... moving blade, 28-29... boss, 30... flexible locking piece,
31...Boss.

Claims (1)

[Scope of Claims] 1. A main body case that houses a drive unit that drives a shaving unit houses a slide frame that integrally forms an auxiliary frame that is connected to an operating unit and slides, and a sideburn blade holding plate,
A boss that holds the movable blade slidably in its longitudinal direction with the movable blade in pressure contact with the fixed blade between the sideburn blade holding plate and the fixed blade, and a boss that positions the fixed blade on the slide frame. A flexible locking piece that is flexible and engages with the rotating blade and presses the fixed blade against the pressing force of the movable blade is integrally formed. Razor. 2. The electric shaver according to claim 1, wherein a part of the sideburn blade holding plate is bulged in a strip shape along its longitudinal direction to be reinforced against warping.