JP2005230237A - Cutter for reciprocal electric razor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reciprocal electric razor which facilitates changes in the sound quality during the use, gives better feeling during the use, and easily generates a desired tone. <P>SOLUTION: In a cutter 52 of the reciprocal electric razor having a plurality of arch-like small blades 56 which are formed integrally with right and left side edge parts 58 and reciprocate while sliding on the inner surface of an arch-like foil 50, a vibration control part 62 for controlling vibrations of the small blade 56 is formed in the proximity of at least one joint where each small blade 56 is connected to the side edge part 58. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an inner blade of a reciprocating electric razor in which a large number of arched small blades are integrally formed and reciprocates while the small blades are in sliding contact with the inner surface of an arched outer blade.

  A reciprocating electric shaver is known in which the inner blade is reciprocated while being in sliding contact with the inner surface of the arch-shaped outer blade, and the scissors entering the openings provided in the outer blade and the inner blade are cut. In this type, there is an assembled inner blade and an integral inner blade (Patent Document 1).

  The assembly type inner blade is obtained by arranging a large number of small blades obtained by punching a thin plate into a semicircular shape and holding them on a holding table. This inner blade processes a large number of small blades separated from each other, and the center and both ends of these small blades are assembled and held on a holding member, so that the assembly is troublesome, the number of manufacturing steps increases, and the productivity is poor. There is.

  The integrated inner blade is a combination of all the small blades. For example, a slit (groove) in the transverse direction is processed in a cylindrical material, and the portion remaining in an arch shape between the slits is used as the small blade. There is something. In addition, there is a type in which a thin plate of metal, ceramic, or the like is bent into a substantially arch shape, and slits are processed so as to cross the ridgeline, thereby forming arched small blades in parallel and at regular intervals.

  Furthermore, it is also known that an inner blade is formed by an integrally molded product of a soft material such as plastic, a coating layer of chromium or the like is formed on the entire surface, and a sliding contact surface with the outer blade is polished (Patent Document). 1).

  On the other hand, when using an electric razor, vibration and noise of the built-in electric motor and drive system are generated, as well as vibration of the blade and friction between the outer blade and the inner blade when cutting the scissors that have entered the opening of the outer blade and inner blade. Sound (cutting sound, shaving sound, friction sound) is also generated by the vibration accompanying the vibration. In particular, the cutting sound and friction sound of the wrinkles by the outer blade and the inner blade are easily perceived by the user because the outer blade is in direct contact with the skin, and directly affects the quality of use.

  Therefore, a large number of ridges intersecting the sliding direction of the inner blade are provided on a single metal flat plate, which is curved in a direction perpendicular to the sliding direction to form an arch shape, and the outer peripheral surface is polished to separate the small blade. It has been proposed (Patent Document 2). In other words, a large number of grooves are formed in a metal flat plate by pressing or grinding with a grinding wheel, and ridges are formed by separating the ridges by peripheral grinding into arch-shaped blades. It is easy to get out.

  In addition, in this patent document 2, in the assembly type inner blade, the center portion of the small blade is supported by the inner blade base, so that the small blade (the inner blade plate 15) is difficult to bend and it is difficult to produce a cutting sound. (Paragraph 0022). Further, this Patent Document 2 describes that by providing a notch (71, FIG. 9) on the inner peripheral edge of the small blade, the arch bending workability is improved and the familiarity with the outer blade is improved to improve the sharpness. (Paragraph 0082). That is, the notch (71) in Patent Document 2 is neither for increasing the cutting sound nor for adjusting the cutting sound effect.

JP 62-148684 A JP 10-323461 A

  However, in this Patent Document 2, the thickness of the flat plate used, the height of the ridge (the radial width of the blade), and the thickness of the ridge (the thickness of the blade in the reciprocating direction of the inner blade) Etc.) determines the vibration characteristics and natural frequency of the blade. For this reason, even if the cutting sound can be increased by changing these conditions, it is difficult to make the sound quality appropriate.

  The present invention has been made in view of such circumstances, and is an integrated inner blade that can easily change the sound quality during use and can easily generate a desired tone with a good feeling of use. An object is to provide an inner blade of a razor.

  According to the present invention, this object is achieved by a reciprocating type in which a large number of arched small blades are formed integrally with the left and right side edge portions and reciprocally move while these small blades are in sliding contact with the inner surface of the arched outer blade. An inner part of an electric razor, wherein a vibration control part for controlling the vibration of the small blade is formed in the vicinity of a connecting part to at least one side edge of each small blade. Achieved with a blade.

  Since the vibration control unit is provided near the connection part to the side edge of the small blade, the use sound of the electric razor can be easily controlled by adjusting this vibration control unit, and a comfortable sound with a good feeling of use can be obtained. Can do.

  The vibration control unit can adjust the volume and quality of the sound by changing the depth and width (width and length) of the cut as the cut provided on the inner periphery or the outer periphery of the small blade. , 3). The vibration control unit may be a cut formed on the side surface in the reciprocating direction of the inner blade instead of or along with the inner and outer periphery of the small blade.

  The vibration control unit may have the same structure (for example, the depth, width, position, and the like are the same if cut) for all the small blades. However, the structure may be different from that of at least some of the blades (for example, the depth, width, position, and the like are changed in the case of cutting). In this case, if the sound generated by the different blades is a chord, a more comfortable sound can be obtained.

  The vibration control unit is preferably provided near both ends of the blade, but may be provided only near one of the ends. Further, the vibration control unit is not limited to the notch (notch), and may be any unit that controls the vibration characteristics. For example, by changing the cross-sectional shape by press working etc. in the manufacturing process of the inner blade, it is easy to vibrate the small blade, or the vibration characteristics are changed by applying local heat treatment such as laser heating near the both ends of the small blade It may be.

  1 is an exploded perspective view of a reciprocating electric razor blade according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a part thereof, and FIG. 3 is a longitudinal sectional view of a section between adjacent blades. It is.

  In FIG. 1, reference numeral 50 is an outer blade, 52 is an inner blade, and 54 is an inner blade holder. The outer blade 50 bends an outer blade body 50a made of a thin metal plate in an arch shape, closes both ends in the length direction with lid plates 50b and 50b, and spans both sides of the lid plates 50b and 50b. In the figure, both edges parallel to the longitudinal direction of the outer blade body 50a are held. The outer blade body 50a is formed with a large number of openings for introducing ridges.

  As will be described later, the inner blade 52 is formed by integrally forming a large number of arch-shaped small blades 56, and the arch-shaped outer peripheral surface of each small blade 56 slides on the inner surface of the outer blade body 50 a of the outer blade 50. It is a curved surface that touches. Bifurcated claws 60, 60 project from the center of the side edge portion 58 parallel to the longitudinal direction (reciprocating direction) of the inner blade 52. These claws 60, 60 engage with convex portions 54a, 54a provided on the side surface of the holding base 54.

  The holding base 54 engages with a vibrating body (not shown) that is reciprocated by a motor, and reciprocates integrally with the inner blade 52. The holding table 54 is pressed toward the outer blade 50 by a spring (not shown), and the inner blade 52 is elastically pressed against the inner surface of the outer blade body 50a. Therefore, the inner blade 52 reciprocates while being in sliding contact with the inner surface of the outer blade body 50a.

  Next, the small blade 54 will be described. As shown in FIGS. 2 and 3, the small blade 54 has an arch shape and both ends thereof are connected to the side edges 58 and 58. Incisions 62 and 62 as vibration control units are formed on the outer periphery in the vicinity of both ends of the small blade 54. The vibration characteristics and natural frequency of the small blade 54 vary depending on the thickness a of the small blade 54, the thickness b of the thin plate as the material, the height c of the small blade 54, and the like. It varies depending on the material and hardness (rigidity) of the thin plate. If elements such as thickness a, b, height c, material, heat treatment, etc. are determined in advance, it is impossible to change the operating sound (shaving sound). However, it is generally difficult to change.

  In the present invention, by providing the cuts 62, 62, it is possible to greatly change the sound used. The cuts 62 and 62 can be formed by moving the inner cutter 52 in the reciprocating direction with the rotation axis of a rotary cutting blade such as a slicing machine vertical in the manufacturing process of the inner cutter 52. By changing the depth and width (length in the circumferential direction) of the cuts 62, the sound quality can be easily and greatly changed.

  FIG. 4 is a longitudinal sectional view of an inner blade 52A according to another embodiment. The small blade 56A of the inner blade 52A has a plurality of cuts 62A and 62A formed on the outer periphery near both ends thereof. The sound quality can be changed by changing the number of cuts.

  FIG. 5 is a front view of an inner blade 52B according to another embodiment, and FIG. 6 is a partially enlarged view thereof. In this embodiment, cuts 62B are formed on the side surfaces in the reciprocating direction near both ends of the small blade 56B. This incision 62B can be machined, for example, by allowing the cutting edge of the drilling machine to enter at a right angle and horizontally with respect to the reciprocating direction of the inner blade 52B (perpendicular to the paper surface in FIGS. 5 and 6).

  FIG. 7 is a front view of an inner blade 52C according to another embodiment, and FIGS. 8A, 8B, and 8C are cross-sectional views taken along lines AA, BB, and CC in FIG. It is. In this embodiment, the structure of the cut 62C is changed with respect to the position of the small blade 56C. That is, the incision 62C is deepest in the small blade 52C near the end of the inner blade 52C and has the largest width (length in the circumferential direction) (see FIG. 8A), and the small blade 52C near the center of the inner blade 52C. The shallowest and the smallest width (see FIG. 8C).

  These incisions 62C can be formed by changing the incision amount while moving the inner cutter 52C in the reciprocating direction with the rotation axis of a rotating grindstone such as a grinder vertical. In this embodiment, the cutting amount may be minimized near the center of the inner blade 52C and maximized near both ends.

The exploded perspective view of the reciprocating blade which is one Example of this invention Similarly, a partially enlarged perspective view of the inner blade Longitudinal sectional view of the same blade Longitudinal sectional view of an inner blade which is another embodiment Front view of inner blade which is another embodiment Partial enlarged view Front view of inner blade which is another embodiment AA line, BB line, CC line sectional view

Explanation of symbols

50 Outer blade 52, 52A, 52B, 52C Inner blade 56, 56A, 56B, 56C Small blade 58 Side edge 62, 62A, 62B, 62C Cutting (vibration control unit)

Claims (6)

In the inner blade of a reciprocating electric razor in which a large number of arched small blades are formed integrally with the left and right side edges, and reciprocates while these small blades are in sliding contact with the inner surface of the arched outer blade,
An inner blade of a reciprocating electric razor, wherein a vibration control unit for controlling the vibration of the blade is formed in the vicinity of a connecting portion to at least one side edge of each blade.   The reciprocating electric razor inner blade according to claim 1, wherein the vibration control unit is formed by a notch provided in an inner periphery near the end of the small blade.   The reciprocating electric shaver inner blade according to claim 1, wherein the vibration control unit is formed by a cut provided on an outer periphery near the end of the small blade.   The reciprocating electric razor inner blade according to claim 1, wherein the vibration control unit is formed by a cut formed on a side surface in the reciprocating direction of the inner blade near the end of the small blade.   The inner blade of a reciprocating electric shaver according to claim 1, wherein the vibration control unit has the same structure for all the small blades.   The inner blade of a reciprocating electric shaver according to claim 1, wherein the vibration control unit has a structure different from that of at least some of the blades.

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