JPS5922544B2 - Blade connection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shaving blade drive mechanism for a dry razor, which facilitates the exchange of the shaving blade and net blade, and stabilizes the sharpness of each.

Conventionally, in this type of dry razor machine, the joint was always pushed up and slid into pressure contact with the movable blade during the shaving drive, absorbing sound and vibrations by the pushing force.

Further, when the net blade is driven, the joint is always pushed up, so that the inner blade is moved up and down, and the pressure of the inner blade against the net blade fluctuates, making it impossible to obtain stable sharpness.

Furthermore, since the outer frame has bushings, it is difficult to assemble, and the number of parts is large, resulting in poor product stability.

Even when disposing of beard debris, it got into the main body case, which not only made it difficult to clean but also led to internal malfunctions.

The present invention eliminates the above-mentioned drawbacks, and by fitting an eccentric joint that converts motor rotation into reciprocating vibration to the outer frame attached to the upper part of the main body case, the outer frame for the scraping blade can be moved from the main body case. At the same time, the eccentric joint also comes off, leaving only the motor joint in the main body case.Also, when using a net blade, simply attach the outer frame for the net blade to the main body case, and the inner blade is attached to the motor joint. The support tool is fitted and the inner cutter rotates.

The rotary sleeve attached to the eccentric pin at the top of the eccentric joint that acts when the scraping blade is driven has a structure in which a biasing force is applied by a spring and can constantly absorb backlash, allowing the movable scraping blade to slide.

Hereinafter, the present invention will be explained in more detail based on the drawings.

First, to explain the structure, 1 is a main body case, and a motor 2 is fixed inside with a motor set screw 3.

A threaded portion 5 is formed below the outer frame 4A, and the main body case 1
It is fitted with.

A protruding wall 6 that protrudes inward is provided above the threaded portion 5 and has a hole 7 in the center, and a fixed blade 10 for scraping the upper cover 9 is provided in the upper opening 8 of the outer frame 4A. protruding pin 1
1, and a movable scraping blade 12 is pressed into contact with the fixed scraping blade 10 (the pressing method is not shown).

Further, in the center groove 13 of the movable scraping blade 12, a drive plate 1 is provided.
4 is provided with an inclined portion 15.

An R portion 17 of a rotary sleeve 16 is engaged with the drive plate inclined portion 15 .

An eccentric pin 19 disposed at the upper part of an eccentric joint 18 is fitted into the center of the rotating sleeve 16, and a spring 21 is loosely fitted into a spring receiving recess 20 at the lower surface.
The upper surface of the eccentric pin 19 is provided with an eccentric pin stopper 7 portion 22 to prevent the rotary sleeve 16 from coming off.

At the bottom of the eccentric joint 18, a protrusion 24 that protrudes a small amount from the center hole 7 of the protruding wall 6 protruding inward from the outer frame has a slope 25, and smoothly connects with the motor joint engagement hole 26 and the motor joint 27. Manufacture an eccentric joint within dimensions that can be fitted to.

The shape of the motor joint 27, as shown in FIG. 3, has an inclined surface 28 on the upper surface and a rotation stopper 29 to reliably transmit the motor rotation to the eccentric joint.

Therefore, the shape of the motor joint 1 [gold hole 26 is also provided with a rotation stopper so that it can be fitted.

The motor joint 27 and the motor shaft 30 are fixedly connected.

FIG. 2 shows the net blade 31 attached to the outer frame 4B, and the inner blade support 32 is fitted to the motor joint 27.
The inner cutter 33 set in the inner cutter support is slid into pressure contact with the inner surface of the net cutter 31.

At this time, the inner cutter support 32 does not move up and down, and the force of the inner cutter spring 34 of the inner cutter 33 is adjusted by the inner cutter pressure adjustment screw 35 to keep the inner cutter pressure contact force constant.

Next, to explain the operation, motor joint 27
The eccentric joint 18 transmits the motor rotation through the
The eccentric pin 19 moves eccentrically, and therefore the rotary sleeve 16 also moves eccentrically and engages with the inclined portion 15 of the drive plate 14.

At this time, when the rotary sleeve 16 is constantly pressed against the drive plate inclined portion 15 by the spring 21 and moves, when a load is applied to the movable cutting blade 12 such as when cutting long hair, the rotary sleeve 16 is lowered and the upper part of the rotary sleeve 16 is moved. The configuration is such that only the straight portion and the straight portion of the drive plate 14 fit together.

When the outer frame 4A is removed from the main case 1 by the threaded portion 5, the outer frame inner projecting wall 6 and the eccentric joint collar 23 come into contact, and the motor joint 27 is removed from the eccentric joint 18.

Eccentric joint 18 detached from motor joint 27
is left on the outer frame 4A, and is pressed against the outer frame inner protruding wall 6 and the eccentric joint collar 23 against the downward force of the spring 21, so that hair debris and the like do not fall off.

When removing the eccentric joint 18, remove the top cover 9 from the outer frame 4A, and when the eccentric joint 18 is pulled out, the eccentric joint protrusion 24 hits the center hole 7 of the inner projecting wall 6 of the outer frame 4A, and the protrusion 24 contracts. It comes off.

When inserting the eccentric joint 18 into the outer frame 4A, hold the center hole 7 of the inner projecting wall 6 of the outer frame and the tilting portion 25 of the eccentric joint protrusion 24 and push it in, so that the eccentric joint protrusion 2
4 contracts and enters.

As shown in the figure, the eccentric joint protrusion 24 is a notched protrusion and is therefore retractable.

When using the net blade 31, it can be used as a net blade simply by engaging the outer frame 4B with the inner blade support 32 attached to the main body case.

Further, as another embodiment, the upper cover and the outer frame may be integrated to function as an outer frame, but the same effect can be obtained.

The effect of the present invention as described above is that it is very easy to convert between the cutting blade drive and the net blade drive.

An eccentric joint is attached to the outer frame for the scraping blade, so there is no need to remove the eccentric joint.

Furthermore, since the pressure at which the inner blade slides into contact with the inner surface of the net blade when using the net blade is constant, stable sharpness can be obtained.

This is because the inner blade support is fitted into the fixed motor joint, and there is no vertical movement between the motor joint and the inner blade support, and the constant inner blade spring stabilizes the cutting quality.

Moreover, not only does the inner projecting wall of the outer frame and the brim of the eccentric joint prevent hair debris from scattering outside, but also cleaning can be done easily by removing the top cover from the outer frame, and the eccentric joint can be removed from the outer frame to allow for clean cleaning.

The rotating sleeve, which fits on the eccentric pin at the top of the eccentric joint, constantly presses the movable scraping blade with a spring, absorbs the play that occurs during manufacturing, and eliminates the causes of noise and vibration.

In addition, since the eccentric pin and the rotating sleeve are fitted, when the engagement between the scraping blade and the rotating sleeve is tight, the rotating sleeve rotates, reducing current consumption, extending battery life, and reducing wear on the engaged parts. Prevented.

In addition, since the eccentric pin is integrated with the eccentric joint, the eccentric pin does not run out and stable eccentricity is transmitted to the movable scraping blade.

Therefore, the sound is also stable. Assembly was also very easy, as the rotating sleeve and spring were integrated into the eccentric joint.

Because the number of parts is small, it is possible to produce inexpensive products.

As described above, the present invention provides an excellent dry razor.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the driving of the scraping blade (the movable scraping blade pressure contact spring, etc. is not shown). FIG. 2 is a longitudinal sectional view showing the net blade and drive. FIG. 3 is a perspective view showing the shape of the motor joint. FIG. 4 is an enlarged view of the rotating sleeve portion in FIG. 1. 1: Main body case, 2: Motor, 3: Motor set screw, 4A: Outer frame for scraping blade/outer frame for 4B net blade, 5: Outer frame screw part, 6: Outer frame inner projecting wall, 7: Outer frame Center hole of inner projecting wall, 8: Opening on top of outer frame, 9: Upper lid, 10: Fixed blade for scraping, 11: Upper cover protruding pin, 12: Movable blade for scraping, 1
3: Groove of the grooved movable blade, 14: Drive plate, 15: Inclined part of the drive plate, 16: Rotating sleeve, 17: Rotating sleeve R section, 18: Eccentric joint, 19: Eccentric pin, 20 Spring receiving recess (rotating sleeve ), 21 Spring, 22: Eccentric pin 7 part, 23: Eccentric joint collar, 24: Eccentric joint protrusion, 25: Eccentric joint protrusion slope, 26: Motor joint engagement hole, 27: Motor joint , 28: Motor joint inclination, 29
: Rotation stopper, 30: Motor shaft, 31: Net blade, 3
2: Inner blade support, 33: Inner blade, 34: Inner blade spring,
35: Inner blade pressure adjustment screw.

Claims (1)

[Claims] 1. In a razor machine in which an outer frame 4A for a scraper blade and an outer frame 4B for a net blade are attached to the main body case 1 in a manner that is replaceable, the eccentric joint 18 attached to the outer frame 4A for a scraper blade has a razor Eccentric pin 19 that drives the blade
The rotating sleeve 16 is fitted to the eccentric pin 19, and a spring 21 is attached to apply a biasing force to the rotating sleeve 16. The eccentric joint 18 is engaged with the outer frame inner projecting wall 6 of the frame 4A, and the eccentric joint 18 is attached to the outer frame 4 for the scraping blade.
A blade connection mechanism characterized by being attached to A.