JP3193378U - Electric razor - Google Patents

Abstract

Provided is an electric razor that minimizes the burden on the skin, can be efficiently shaved even with a heel, and can be shaved without changing the outer blade. Long-lasting is also intended.
An electric razor having an outer blade 2 having rivet introduction holes 5 and 6 having a long side and a short side and an inner blade that slides and moves on the inner side of the outer blade. An electric shaver, which is arranged so as to intersect at an acute angle in the shape of an eight and whose depression angle is in the range of approximately 20 ° to 25 °. Furthermore, the shape of the outer blade is formed in a substantially trapezoidal shape in a side view, and at least a trapezoidal corner is provided around the corner so that even a long ridge can be guided to the heel introduction hole. The inner angle is set from 95 ° to 115 °, and in order to ensure the strength of this portion, the thickness is increased by 30% as compared with the thickness of the other outer blade part to ensure the burden on the skin and the durability.
[Selection] Figure 1

Description

  The present invention relates to an electric razor, and more particularly to a razor head.

  The outer blade of the electric razor is formed by curving a net blade having a large number of punch introduction holes into a kamaboko shape. This shape of the outer blade can be in close contact with the skin and efficiently shave, but long and bent folds may not be properly guided by the outer blade's heel introduction hole, and may remain unshaved or not shave from the root. . Since wrinkles that grow in a direction parallel to the skin do not protrude from the skin, the wrinkles are crushed by the outer blade and brought into close contact with the skin. It is because it is not possible.

  In addition, a curved blade is not suitable for shaving or sideburning, and it is possible to replace the blade for trimming (trimmer blade) at any time.

  In addition, the electric razor of the type that shave by swinging the inner blade to the left and right and the electric razor of the type that shave by rotating the inner blade, devise the shape and arrangement of the hole of the outer blade so that no shaving remains. You can see what you have configured.

  There is also a combination of a plurality of razor heads and a combination of an arch-shaped finishing shave blade and a rectangular rough shave blade having slit holes.

  On the other hand, the curved outer blade not only folds closely against the skin but also cuts off the skin stratum corneum and causes rough skin.

  In addition, various complicated shapes have been developed as a heel introduction hole for drilling in the outer blade. However, if the heel introduction hole is short, a long heel cannot be erected from the root, and the heel can be effectively shaved. Can not.

  Moreover, since the outer blade is formed extremely thin in pursuit of deep shaving, it is easy to bend and lacks durability. Although the number of rotations is increased unnecessarily for the purpose of efficient shaving, it causes the consumption of blades and batteries to be accelerated.

JP 09-313754 A Japanese Patent Publication No. 2652824 JP-A-8-141226 Japanese Patent Laid-Open No. 49-110456 JP 2010-264140 A

Utility Model Reference 6

Japanese Utility Model Publication No. 58-190969

Utility Model Reference 7

Japanese Utility Model Publication No. 48-25919

In the electric razor described in Patent Document 1, slit outer blades having a plurality of parallel slits are disposed on both sides of an arch outer blade curved in an arch shape, and the slit outer blade acts like a comb. However, the arched outer blade still cannot guide and cut the wrinkle into the wrinkle introduction hole. On the other hand, since the arched outer blade presses the heel and adheres to the skin, or the direction of the heel is distorted, there is a high possibility that the heel cannot be reliably cut even if the slit outer blade is provided.
Further, since the slit outer blades and the arch outer blades are arranged in two rows each, the manufacturing cost is increased.

  In the electric razor described in Patent Document 2, a large number of rivet introduction holes perforated in the outer blade frame have a square shape or a parallelogram shape, but the outer blade itself is curved and formed in a kamaboko shape. I cannot shave efficiently. In addition, a cocoon that is longer than the cocoon introduction hole or that is greatly curled cannot be introduced successfully.

  In Patent Document 3, Patent Document 4 and Utility Model Document 6, the inner blade that swings to the left and right (the inner blade is disposed perpendicular to the swing direction), the hole of the outer blade is made to the inner blade. An example in which the inner blade is inclined is disclosed, and Patent Document 5 discloses an example in which the inner blade is inclined with respect to the hole of the outer blade that is arranged perpendicular to the swinging direction. However, it is possible to shave the sword somewhat more efficiently than when it is not inclined by this inclined arrangement, but there are still problems in terms of sharpness and battery life.

  In Utility Model Document 7, the cross section of the head part of an electric razor is formed in a trapezoidal shape, the hole of the outer blade is rectangular, the inner blade of the upper corner of the trapezoid is recessed, and there is long Although a structure for guiding and shaving the heel is disclosed, in order to shave the introduced heel, the structure is such that it cannot be shaved unless the electric razor is rotated along the skin. Arise.

  In view of the above conventional examples, the present application can efficiently shave long wrinkles and comb hair while reducing the burden on the skin, and is conveniently used by integrally forming a trimmer blade and a shaving blade. An object of the present invention is to provide an electric shaver having a long battery life, low cost and excellent durability.

  In order to solve the above-mentioned problem, the present invention forms an outer blade made of a single steel plate into a substantially trapezoidal shape that expands downward in a side view, and has at least a long side and a short side. An electric razor having a plurality of outer blades and an inner blade that slides and moves on the inner side of the outer blade, wherein the long side of the hole and the inner blade are arranged so as to intersect at an acute angle in an eight-letter shape. The smaller depression angle is in the range of about 20 ° to 25 °. When the hole of the outer blade and the inner blade are set so that the depression angle is sharply about 20 ° to 25 °, as in the figure of eight, the ridge can be sheared most efficiently and cut with a light load. .

  Further, a plurality of ridge introduction holes are arranged so as to include the corner of the trapezoidal upper side of the outer blade formed in the substantially trapezoidal shape so that the inner angle of the corner of the substantially trapezoidal upper side is approximately 95 ° to 110 °. By configuring as described above, it is possible to efficiently shave even the hairs and long wrinkles at the corners without rotating the razor as in the prior art. Note that the edges of the corners are rounded so that a smooth slip is obtained so that the corners do not pierce the skin.

  Furthermore, by making the thickness of the outer edge of the upper side of the substantially trapezoidal shape and the vicinity thereof (several millimeters) 30% or more thicker than the thickness of the outer blade of the other shaving part, this part becomes a convex part. Even if it exists, since it has intensity | strength, durability can also be ensured, without biting into skin.

  Further, when the present invention is applied to an electric razor having a structure in which the inner blade is slidably rotated inside the outer blade to shave the heel, a plurality of heel introduction holes having at least a long side and a short side are provided in the plurality of outer blades, By arranging the long side of the hole and the inner blade so as to intersect at an acute angle in the shape of an eight, and arranging the inner and outer blades so that the smaller depression angle is in the range of about 20 ° to 25 °, An electric shaver with excellent sharpness can be realized. In this case, the inner blade shape may have a curve in the longitudinal direction.

  By setting the outer blade and the inner blade to the sharpest depression angle (20 ° to 25 °), cutting can be efficiently performed, shaving can be completed in a short time, and the battery life can be extended.

  The angle of the substantially trapezoidal shape is set to the optimum angle (inner angle of 95 ° to 110 °), and the wrinkle introduction hole is provided around this corner portion, so that the corner portion can be rotated without rotating the shaving as in the conventional case. Cuts hair and long wrinkles efficiently, and can also be used for sideburns and shaving. That is, since the so-called trimmer blade and the blade for deep shaving are integrally formed on one outer blade, these shavings can be performed continuously, which is convenient and efficient. This is especially useful when you are busy, such as before you go to work. Further, since it is not necessary to replace the blade depending on how to shave and the number of parts is small, the structure is simple, the manufacturing cost can be reduced, and the whole can be downsized.

  By increasing the thickness of the corner and its vicinity by at least 30% compared to other portions, the corner can be prevented from biting into the skin, durability can be increased, and the razor life can be extended.

  Since a single metal plate is pressed to form an outer blade, it can be mass-produced at low cost, and the cost can be reduced.

The top view of the outer blade of a reciprocating razor. Same as above, front view. Same side view. The top view of an inner blade. The top view of the outer blade of a rotary razor. Sectional drawing of a rotary razor.

Hereinafter, an optimal embodiment of the present invention will be described in detail with reference to the drawings.
This embodiment is applied to a reciprocating electric razor composed of a main body and a head portion provided on the upper portion of the main body, and this reciprocating electric razor includes a main body (not shown) and a main body of the main body. It is comprised with the head part 1 provided in the upper part (FIG. 1). The main body is provided with driving components such as a driving battery, a motor, and a vibrator that converts the rotation of the motor into a reciprocating motion. Since the drive unit structure employs a well-known structure, description thereof is omitted.

The head portion 1 has an outer blade 2 made of a single steel plate, and the outer blade 2 is attached to an outer blade cassette (not shown) that holds the outer blade 2 so as to be swingable in the vertical direction.
The outer blade 2 is bent into a rectangular shape after pressing a flat metal plate to open a large number of rivet introduction holes in parallel. Of course, it is also possible to process these at once. For example, when the razor blade is viewed from the side as shown in FIG. 3, the thickness of the outer blade 2 is a shape in which the upper side of the trapezoid is not flat but gently convex (this is called a substantially trapezoid). ), Except for the upper corner 4 and the vicinity thereof, the thickness is 0.1 to 0.15 mm, and the corner 4 and the vicinity thereof are increased by at least 30% of the upper side of the trapezoid from the viewpoint of durability and the like, that is, 0.13 to 0 A thickness of 20 mm is preferred. In addition, it is natural that the corners (4 and 2c) are rounded to the corners so that the corners (4 and 2c) do not pierce the skin and the slip is good. is there.
If you try to make the outer blade thin and make it adhere to the skin, the skin will press deeply into the razor blade, and the skin will be scraped with the heel and damaged, but if you make the outer blade 2, especially the corner 4 thick, In addition to improving the durability of the outer blade, it is possible to prevent the skin from entering the outer blade.

  In the example shown in FIG. 3, the outer cutter 2 has a rising surface 2 a-2 a and an outer cutter center 2 c that are inclined toward the outer cutter center 2 c with corner portions 4-4 formed on both side surfaces thereof in a side view. A trapezoidal shape in which the upper side is slightly convex from the upper surface portion 2b-2b formed in the middle to high direction. The upper surface portion 2b is not necessarily limited to a medium-high shape, and may be formed in a completely flat shape. In the present invention, these are collectively defined as a substantially trapezoid. The inner angle of the upper corner 4 of the trapezoid can be most efficiently shaved by setting it to approximately 95 ° to 110 °.

  A large number of rectangular holes (slits) 5 having a short side and a long side whose upper surface is open are perforated in parallel above the rising surfaces 2a-2a formed on both sides of the outer blade 2. Yes. The ratio of the long side to the short side of the hole is preferably 4: 1 and the width of the short side is 0.7 to 1.0 mm, but this is not limiting. The hole 5 is drilled extending from the corner portion 4-4 of the outer blade 2 to the rising surface 2a-2a formed obliquely so as to expand downward. Similarly, a number of rectangular wrinkle introduction holes 6 are formed in the flat portion 2b.

On the other hand, the inner blade 7 is composed of a number of thin metal plates 8 arranged on the upper surface of a rectangular frame in parallel and at equal intervals, and has a substantially rectangular shape which is the same shape as the outer blade 2 in a side view ( Not shown). Each edge 8a of the metal thin plate which forms the inner blade 7 is a cutting blade.
The thin metal plate 8 is disposed so as to be inclined in the direction opposite to the long side of the hole 5 perforated in the outer blade 2 or the inclination of the flange introduction hole 6 (that is, in an eight-letter shape). The angle between the introduction hole 6 and the cutting edge 8a is set in a range of approximately 20 ° to 25 °. This is just the angle when using a kite, and it gives the optimum sharpness. Further, the inner blade and the outer blade are reinforced to enhance the strength of each other.

The electric razor of the present application performs shave while reciprocating the razor head 1 brought into contact with the skin in the arrow direction 9 of FIG. On the other hand, the inner blade 7 reciprocates while being in sliding contact with the inner surface of the outer blade in a direction perpendicular to the arrow direction 9 in FIG. Then, the scissors guided to the slit 5 of the outer blade and the scissor introduction hole 6 are surely cut so as to be cut with scissors by the blade edge 8a of the inner blade 7 approaching while intersecting.
In addition, although the rectangular thing is shown here as the shape of the hole 5, the short side has a U shape or an inverted U shape, a drum shape in which both long sides are recessed, or a drum that has a convex shape. The shape of a shape or a combination of these may be used.

Next, an embodiment in which the present invention is applied to a rotary electric razor head will be described. This electric razor includes a razor main body (not shown) formed in a Y shape and a head portion 10 that is float-supported by the main body, and a battery, a circuit board, a switch, and the like are arranged inside the main body. is there. The head portion 10 shown in FIG. 5 includes an outer cutter 11 and an inner cutter 12 that slides and rotates on the inner surface of the outer cutter 11. A known drive means is accommodated in the head case.
An outer blade holder for holding the sheet-shaped outer blade 11 in an inverted U shape is detachably mounted on the outer surface of the head case. Reference numeral 17 denotes a rib formed to increase the durability of the outer cutter 11.

The peripheral surface of the outer cutter 11 is provided with a large number of scissors introducing holes 13 having long sides and short sides as described above, and each side constituting the scissors introducing hole 13 is parallel to the longitudinal direction of the razor body. The ratio of the short side perforated to the long side is formed to be about 1: 4, and the wrinkle introduction hole 13 is a vertically long long hole as shown in FIG.
The inner blade 12 includes a cylindrical inner blade holder 14, a metal inner blade shaft 15 fixed along the axis of the inner blade holder 14, and a spiral planting along the peripheral surface of the inner blade holder 14. It consists of nine blades 16 provided.
The smaller blade angle of the longer side of the inner blade 12 and the outer blade ridge introduction hole 13 is set to be 20 ° to 25 °, and is set so that the ridge can be efficiently cut by this angle during rotation. Yes. The inner blade 12 may be curved in the long side direction so that the depression angle changes within the angle according to the rotation.

  Since the wrinkle introduction hole 13 is a vertically long hole, even a long wrinkle can be erected from the root, and the inner blade 12 that rotates while approaching the outer blade 11 can achieve good cutting at a sharp angle. Moreover, since the outer blade 11 and the inner blade 12 reinforce each other, the bending of the outer blade 11 is suppressed, leading to an improvement in the durability of the razor.

  The present invention can be applied to a reciprocating or rotating electric shaver. It can also be applied to shaving razors for efficient shaving of long folds.

DESCRIPTION OF SYMBOLS 1, 10, Razor head 2, 10, Outer blade 2a, Outer blade rising surface 2b, Outer blade substantially flat surface portion 2c, Outer blade center 5, 6, 13, Wedge introduction hole 5, Wedge introduction hole 4 , Outer blade corners 7 and 12, inner blade 14, inner blade holder 15, inner blade shaft 16, blade

Claims (4)

  An outer blade made of a single steel plate formed in a substantially trapezoidal shape that tapers downward in a side view, and the outer blade has a plurality of rivet introduction holes having a long side and a short side, It has an inner blade that slidably moves on the inner side, is arranged so that the long side of the flange introduction hole and the inner blade intersect at an acute angle in an eight-letter shape, and the smaller depression angle that intersects is approximately An electric razor characterized by being set to 20 ° to 25 °.   Furthermore, a plurality of ridge introduction holes having long sides and short sides are arranged so as to include at least the upper side corner of the trapezoidal shape, and the inner angle of the upper side corner is set to be approximately 95 ° to 110 °. The electric razor according to claim 1, wherein:   Furthermore, the corners of the upper side of the substantially trapezoidal shape and the thickness of the outer blades in the vicinity thereof are made at least 30% thicker than the thickness of the outer blades of the other shaving portions. Electric razor.   In the electric razor having a structure in which the inner blade is slidably rotated inside the outer blade to shave the heel, the outer blade has a plurality of heel introduction holes having a long side and a short side, the long side of the heel introduction hole and the An electric razor characterized in that the inner blade and the inner blade are arranged so as to intersect at an acute angle in the shape of an eight, and the smaller depression angle of the intersection is set to approximately 20 ° to 25 °.

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