JPS62595Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reciprocating electric shaver consisting of an inner cutter in which a large number of blades are arranged in parallel and move back and forth, and an outer cutter in sliding contact with the inner cutter. The purpose is to ensure that ivy debris, soapy water, etc. fall off.

The inner blade of a reciprocating electric shaver has the disadvantage that the spacing between the blades is narrow, so that beard debris and skin oils tend to accumulate between the blades, resulting in a reduction in cutting performance. In particular, when shaving with soapy water applied to the skin, the soapy water tends to accumulate between the blades, causing beard debris to accumulate. In order to deal with this drawback, it was considered to wash the area between the blades with water, but there was a drawback that the beard debris had a strong adhesive force and could not be easily removed.

This invention was developed in view of this background.
The embodiment shown in FIGS. 1 to 4 will be explained below.

In the figure, 1, 1... are blades, the plate thickness (illustration B) is 0.5 mm, and the blade width (illustration A) is 0.5 mm.
The diameter of the blade is 0.4 mm, and the overall shape is fan-shaped with an outer radius of approximately 6.5 mm that acts as a cutting edge. The blade 1 is integrally provided with connecting wide portions 2, 2, 2 protruding from both ends and the center. In other words, the blade 1 has been thinned out except for the wide connecting portion 2. A large number of blades 1 are inserted into a mold at a predetermined pitch, and when molding resin flows in, ribs 3, 3, 3 connect each blade 1, and the three ribs 3 form fan-shaped side plates at the ends. Connect firmly with 4,4. At this time, the three ribs 3 have a structure that connects each blade 1 while sandwiching the wide connecting portion 2. In addition, although the recess 5 is provided in the central part of the blade 1 in the figure, it goes without saying that the present invention is not limited to this.

Each of the blades 1 connected by the rib 3 and the fan-shaped side plate 4 reciprocates in the direction C in the figure, and its cutting edge portion slides into contact with the outer blade 6 having a large number of hair introduction holes to cut the hair. In addition, in the figure, the connecting wide portions 2 protrude from the upper surfaces of the ribs 3 at both ends by an amount D shown in the figure, but this D
It is preferable that the amount is close to zero because it does not accumulate beard debris here.

For such reciprocating electric razors, one method of using a reciprocating electric razor that tends to leave beard debris between the blades is to apply shaving cream to the skin, shave, and then wash the area between the blades with water to remove the beard debris. All removed.

Based on this example, it was determined that the adhesive force between the blades 1 was proportional to the adhesive area of the blades 1, and various prototype blades 1 were tested and the graph shown in FIG. 4 was obtained. In other words, the adhesive area per unit length of the blade is the blade width (A in the diagram).
This amount is considered as the sum of the front and back surfaces in the direction and one surface in the direction of the blade thickness (B in the figure) (the other surface is in sliding contact with the outer blade 6, so it is ignored as the adhesive area).
If we take 2A+B on the horizontal axis and the amount of beard debris remaining between blades after adding shaving cream and rinsing with water on the vertical axis, at the point where 2A+B is 1.3 mm, the amount of remaining beard debris is 0 mg. , as 2A+B further increases, the amount of remaining whisker debris increases, and when 2A+B is 3.5 mm, data was obtained that hardly any whisker debris is removed by washing with water.

As you can see, the reciprocating electric shaver of this invention is
Unlike conventional blades, this blade is not only designed with strength in mind, but is also designed so that the sum of twice the blade width and the blade thickness is 1.3 mm or less. It is now possible to reliably remove beard debris that has accumulated in the machine.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, where Figure 1 is an exploded perspective view of the main parts of a reciprocating electric shaver, Figure 2 is a sectional view taken along cutting lines X and X, and Figure 3 is a cross-sectional view along cutting lines Y and Y, and Figure 4 is a graph showing the cleaning effect of beard debris.

Claims (1)

[Scope of utility model registration request] In a reciprocating electric shaver consisting of a reciprocating inner cutter with multiple blades arranged in parallel and an outer cutter in sliding contact with the inner cutter, the sum of twice the blade width and the blade thickness is 1.3 mm or less. A reciprocating electric razor characterized by being set as follows.