JPS6147551B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a shearing plate having hair entry holes and a drivable cutting unit having a cutter, the cutter engaging the inner surface of the shearing plate at one end having a cutting edge, The cutting blade cooperates with the cutting edge of the shear plate for cutting action during operation of the device and is formed by the edge of the hair opening, and the cutter relates to such a shaving device provided with a reed cutter.

Such a shaving device is known, for example, from Dutch patent application No. 7404657. As a result of the action of the reed stubble, the stubble cuts the hair when it is slightly pulled out from the skin, hence a good shaving result is obtained.

It is an object of the invention to improve the operation of said device, and for this purpose the construction of said device is such that the cutting edge of the shear plate has an inner surface of the shear plate, a bristle hole extending across the inner surface of the shear plate. It is characterized in that it is defined by a wall and a transition wall portion between them.

A preferred embodiment is characterized in that the transition wall section is constituted by a flat wall section, which wall section makes an obtuse angle with both the inner surface of the shear plate and the wall of the pore extending across the inner surface. have

The invention is also embodied in the cutting unit used in the embodiments described above.

Hereinafter, the present invention will be explained in detail with reference to the illustrated embodiments.

The shaving device shown in Figures 1 and 2 has a housing 1.
a part of the housing includes three shear plates 3
Forms a shear plate retainer 2 for. The shear plate 3 has hair entry holes 4 formed therein.

As shown in the partial cross section of FIG. 2, the cutting unit 5 is located on the inner side of the shear plate 3. The cutting unit 5, shown schematically in FIG. 2 for the sake of clarity, includes a cutting member having a cutter and a reed cutter, and is shown in a perspective view and on an enlarged scale in FIG.

The cutting unit 5 is connected to the electric motor 1 by means of a hollow spindle (FIG. 2), gears 7, 8 and spindle 9.
0 so that this cutting unit can rotate relative to the associated shear plate 3. The gear 7 is rotatably supported on a pin 11, which is attached to a mounting plate 12. Gear 7 is recessed part 1
3, and this recess is closed by a cover plate 14. This recess receives the flange 15 at the end of the hollow spindle 6. The flange 15 has a non-circular shape.
For example, by providing a square shape and shaping the recess 13 accordingly, a joint is obtained that transmits the rotational movement of the gear 7 to the spindle 6. The spindle can pivot in all directions.
The spring 16 is mostly located within the hollow spindle 6 and stretched between the hollow spindle 6 and the gear 7;
This applies a force on the spindle 6 in the direction of the cutting unit 5. When the cylindrical part 17 of the spindle 6 abuts the cutting unit 5, this force is applied to the cutting unit and, via the cutting unit, to the shear plate 3 and therefore to the shear plate holder 2 with the shear plate rim 18. Being pushed. As a result of external forces, the shear plate 3 together with the cutting unit and spindle 6 can be pressed inward against the action of the spring 16, as can occur during use of the shaving device.

The joint for transmitting the rotary movement between the spindle 6 and the cutting unit 5 is obtained in that the spindle 6 is provided with an end of substantially rectangular cross section. This end 19 is placed in a corresponding connecting hole of the cutting unit 5.

As mentioned above, the connection to the electric motor 10 is through the first,
The three gears 7 are the same as those for the three cutting units of the device shown in FIG.
It engages the single centrally located gear 8 above.

The cutting unit 5 (FIG. 3) consists essentially of a cutting member 21 with a central body 22 having peripheral cutters 23. The cutter is secured to the central body 22 by an arm 24. The central body 22 includes a connecting hole 20 . Each cutter 23 includes a lead cutter 25, and each cutter 23 has a cutting edge 26,
The lead cutter 25 has a sharp cutting edge 27. The reed cutter 25 is connected by an arm 28 to a central disc 29 which is fixed to the central body 22.

4 and 5 are side views schematically showing part of the cutting unit 5 and part of the shearing plate 3, in which the skin part 30 with bristles 31 is also shown. When the hair 31 is taken into the hair entry hole 4, this hair is transferred to the cutting unit 5.
As a result of the rotational movement of
is pressed against the cutting blade 32 of.

Although the sharp cutting blade 27 slightly penetrates into the hair 31,
The structure is designed to prevent this hair from being cut off. The reaction force applied to the reed cutter 25 by the bristles 31 is opposite to the moving direction P. This force must be compensated by a component N ₁ of the normal force N exerted on the reed cutter 25 by the wall 33 of the cutter 23 (FIG. 4). A component N ₂ of the normal force N moves the reed cutter 25 relative to the cutter 23 , the movement of which is substantially directed away from the shear plate 3 . The sharp cutting edge 27 of the reed cutter 25 penetrates slightly into the bristles 31, so that the bristles are displaced by the reed cutter.

The cutting edge 32 is delimited by the inner surface 34 of the shear plate 3, the wall 35 of the hair hole extending transversely to the inner surface of the shear plate, and the transition part 36 between these. Wall 35 and transition wall portion 36 form an obtuse angle α, while said inner surface 34 and wall portion 36 form an obtuse angle β. As a result of the force applied to the bristles 31 by the reed cutter 25,
The bristles are deflected in an inclined position and abut against wall portion 36 (FIG. 5).

If frictional forces are ignored, the reaction force R of the wall section 36 on the bristles 31 is perpendicular to the wall section and includes a component force R ₂ which, like the force N ₂ , acts on the shear plate. The direction is across the side. Thus the component force
R ₂ increases the effect of force N ₂ so that hair 31
is moved in a direction transverse to the inner surface 34 of the shear plate 3.

This effect also occurs if there is a frictional force between the bristles 31 and the wall portion 36.

The bristles 31 slide along the transition wall portion 36 until the cutting edge 26 of the cutter 23 reaches the bristles at position B (FIG. 5). The hair is subsequently cut at this position B by the cooperation of the cutter 23 and the shearing plate 3.

Without the reed clipper, the hair would be cut at position A, but as a result of this reed clipper effect,
The hairs are cut closer to location B, therefore a better shaving result is obtained.

Alternatively, the transition wall section may have a cross-section of an inner surface 34 instead of a straight line 36 as shown in FIGS.
and wall 35, or may have a different rounded shape.

As mentioned above, the construction of shear plates with bristle holes having blades with flat or rounded cutting edges can be used in different types of shaving devices, such as those in which the cutting unit is reciprocating, and is generally It can be used where the structure of the reed clipper allows the hair to move along the cutting edge of the shear plate.

[Brief explanation of the drawing]

1 is an elevational view of a shaving device with three shear plates; FIG. 2 is a partially sectional side view taken above the line of FIG. 1 showing the shaving device of FIG. 1;
The figure is a perspective view showing a part of the cutting unit and the shear plate, and FIGS. 4 and 5 are enlarged views showing details of a part of the cutting unit and the shear plate. 1...Housing, 2...Shear plate retainer, 3
... Shear plate, 4 ... Hair entry hole, 5 ... Cutting unit, 6 ... Hollow spindle, 7, 8 ... Gear, 9
... spindle, 11 ... pin, 12 ... mounting plate, 13 ... recess, 14 ... cover plate, 21 ...
Cutting member, 22... Central main body, 23... Peripheral cutter, 24... Arm, 25... Lead cutter, 2
7... Cutting blade, 29... Center disk, 31... Hair, 3
6...Transfer part.

Claims (1)

[Scope of Claims] 1. A driveable cutting unit comprising a shearing plate having a hair entry hole and a cutter engaging the inner surface of the shearing plate having one end provided with a cutting blade, the cutting blade being activated by the actuation of the device. For medium cutting action, the cutting edges of the shearing plate cooperate with the cutting edge of the shearing plate and are formed by the edge of the hair entry hole, and the cutting edge of the shearing plate is A shaving device defined by an inner surface of the shear plate, a wall of the bristle hole extending across the inner surface of the shear plate, and a transition wall portion therebetween. 2. The shaving device according to claim 1, wherein the transition wall portion is a flat wall forming an obtuse angle with both the inner surface of the shear plate and the wall of the bristle hole extending across the inner surface. A shaving device comprising parts.