JPS5858117B2 - Inner blade for rotary electric shaver - Google Patents

Description

【発明の詳細な説明】 この発明は回転式電気かみそり用内刃に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inner cutter for a rotary electric shaver.

一般に電気かみそりでは、使用時に外刃の刃穴から泥層
が飛散すると、衣服汚染、目の障害、気管障害などを起
こすおそれがあるため、泥層飛散の防止手段を構しるこ
とが望まれている。Generally, when an electric razor is used, if the mud layer scatters from the cutter hole of the outer blade, it may contaminate clothes, cause eye problems, and cause respiratory tract problems, so it is desirable to have a means to prevent the mud layer from scattering. ing.

しかしながら、従来の回転式電気かみそりのヘッドは第
１図に示すような構造になっている。However, the head of a conventional rotary electric shaver has a structure as shown in FIG.

すなわち、把持を兼ねた本体１にモータ２が内蔵され、
その上端部に髭溜め部３を形成し、その中央部にモータ
軸４を突出して髭溜め部３の開口部に外刃フレーム５を
ねじ込み、モータ軸４に継軸６を介して内刃フレーム７
を嵌合する。That is, the motor 2 is built into the main body 1 which also serves as a grip,
A beard storage part 3 is formed at its upper end, a motor shaft 4 is protruded from the center thereof, an outer cutter frame 5 is screwed into the opening of the beard storage part 3, and an inner cutter frame is connected to the motor shaft 4 via a joint shaft 6. 7
mate.

外刃フレーム５は先端部に外刃８を張設している。The outer cutter frame 5 has an outer cutter 8 stretched over its tip.

また、内刃フレーム７は裏面に３個の押上げ用板ばね９
を円形配置してフレーム７に形成した突起により溶着し
、板ばね９の先端部の相当位置で内刃フレーム１に内刃
挿通孔１０を形成し、内刃１１を挿通孔１０に挿通して
その下端部を板ばね９の先端部に取付け、板ばね９によ
り内刃１１を上方に付勢して外刃８の内面に弾接する。In addition, the inner cutter frame 7 has three push-up leaf springs 9 on the back side.
are arranged circularly and welded by projections formed on the frame 7, an inner blade insertion hole 10 is formed in the inner blade frame 1 at a position corresponding to the tip of the leaf spring 9, and the inner blade 11 is inserted into the insertion hole 10. Its lower end is attached to the tip of the leaf spring 9, and the leaf spring 9 urges the inner cutter 11 upwardly so that it comes into elastic contact with the inner surface of the outer cutter 8.

なお、８ａは髭誘導溝、Ａは泥層、Ｂは風の方向である
。Note that 8a is a whisker guide groove, A is a mud layer, and B is a wind direction.

このようにしてモータ２を駆動すると、継軸６を介して
内刃１１が回転し、髭そり可能となる。When the motor 2 is driven in this manner, the inner cutter 11 is rotated via the joint shaft 6, and shaving becomes possible.

内刃フレーム７０回転にともなって板ばね９および内刃
１１によって髭溜め部３内に乱気流が発生し、溜った泥
層を巻き上げる。As the inner cutter frame 70 rotates, a turbulent air flow is generated in the beard storage part 3 by the leaf spring 9 and the inner cutter 11, and the accumulated mud layer is stirred up.

その結果、外刃８の刃穴より泥層Ａを飛散するという欠
点が生じる。As a result, there arises a drawback that the mud layer A is scattered from the cutter hole of the outer cutter 8.

このため改良案として、第２図のように、板ばね９を内
刃フレーム７の裏面にほとんど密着させた状態にし、裏
面の凹凸を少なくして乱気流の発生を抑制するものがあ
るが、板ばね９と裏面とのすき間１２に泥層が溜まるよ
うになって板ばね９の弾性を阻害し、内刃１１０弾接作
用を低下して切味を悪くするという欠点を招来する。Therefore, as an improvement plan, as shown in Fig. 2, there is a method in which the leaf spring 9 is brought into close contact with the back surface of the inner cutter frame 7, thereby reducing the unevenness of the back surface and suppressing the occurrence of turbulence. A mud layer accumulates in the gap 12 between the spring 9 and the back surface, impeding the elasticity of the leaf spring 9, reducing the elastic contact action of the inner cutter 110, and causing poor cutting quality.

したがって、この発明の目的は、泥層飛散を防止した回
転式電気かみそり用内刃を提供することである。Therefore, an object of the present invention is to provide an inner cutter for a rotary electric shaver that prevents the scattering of a mud layer.

この発明の一実施例を第３図ないし第６図に示す。An embodiment of this invention is shown in FIGS. 3 to 6.

すなわち、この回転式電気かみそり用内刃は、第１図に
おいて内刃フレーム７０周縁部７ａを下面に突成し、そ
の下端面に取付孔１３を形成して円形平板状のカバー１
４を下端面に当接し、その取付孔１３に対応してカバー
１４に取付部１５を折曲形成し、取付部１５を取付孔１
３に圧入して着脱自在にカバー１４を取付ける。That is, in FIG. 1, this inner cutter for a rotary electric shaver has a peripheral edge 7a of an inner cutter frame 70 projecting from the lower surface, a mounting hole 13 formed in the lower end surface, and a circular flat cover 1.
4 is brought into contact with the lower end surface, a mounting portion 15 is bent on the cover 14 corresponding to the mounting hole 13, and the mounting portion 15 is attached to the mounting hole 1.
3 and attach the cover 14 removably.

カバー１４は内刃１１の下端部に対応して泥層落下孔１
６が形成される。The cover 14 has a mud layer falling hole 1 corresponding to the lower end of the inner cutter 11.
6 is formed.

また、第５図に示すように、内刃フレーム７の内側面は
３個の内刃１１の相互間隔内で、一端から他端にかげて
回転中心からの半径ＲがＲ１〈Ｒ２と漸次増加するよう
に形成している。Further, as shown in FIG. 5, the radius R from the center of rotation of the inner surface of the inner cutter frame 7 gradually increases from one end to the other end as R1<R2 within the mutual spacing of the three inner cutters 11. It is formed to do so.

なお、内刃フレーム７の軸部７ｂの下端部内面に掃除用
の保持凹部７ｃをアンダーカット形成している。Note that a holding recess 7c for cleaning is undercut formed on the inner surface of the lower end portion of the shaft portion 7b of the inner cutter frame 7.

この回転式電気かみそり用内刃は、内刃フレーム７が回
転しても、内刃フレーム７の裏面がカバー１４によって
フラットに形成されるため髭溜め部３に乱気流を発生さ
せない。In this rotary electric shaver inner cutter, even if the inner cutter frame 7 rotates, the back surface of the inner cutter frame 7 is formed flat by the cover 14, so that no turbulence is generated in the beard storage part 3.

したがって発情飛散が抑制される。Therefore, estrus scattering is suppressed.

そのため、板ばね９を内刃フレーム７に対して十分な間
隔をおいて取付けでき、板ばね９の弾性作用を阻害しな
い。Therefore, the leaf spring 9 can be attached to the inner cutter frame 7 with a sufficient distance therebetween, and the elastic action of the leaf spring 9 is not inhibited.

また、カバー１４は平坦であるので表面付着した泥層の
掃除がしやすい。Further, since the cover 14 is flat, it is easy to clean the mud layer adhering to the surface.

さらに、泥層落下孔１６を内刃１１の下端面に位置させ
ると、内刃１１を伝った大部分の泥層をスムーズに髭溜
め部３に落下でき、飛散防止になる。Furthermore, by locating the mud layer falling hole 16 on the lower end surface of the inner cutter 11, most of the mud layer that has passed down the inner cutter 11 can fall smoothly into the beard storage part 3, thereby preventing it from scattering.

同時に、泥層落下孔１６の縁部を内刃フレーム７の内側
面に位置させると、カバー１４内に溜まった泥層は風や
遠心力で内側面に移動するので自然に泥層を落下孔１６
へ誘導できる。At the same time, if the edge of the mud layer drop hole 16 is located on the inner surface of the inner cutter frame 7, the mud layer accumulated inside the cover 14 will be moved to the inner surface by wind or centrifugal force, so that the mud layer will naturally fall into the hole. 16
can be guided to.

とくに内側面と中心部との距離すなわち半径Ｒを前記の
ようにすると、内側面に当った泥層は遠心力により内側
面に沿って半径Ｒの大きい方へ移動するので、自動的に
滑落下孔１６へ誘導される。In particular, if the distance between the inner surface and the center, that is, the radius R, is set as above, the mud layer that hits the inner surface will move along the inner surface toward the larger radius R due to centrifugal force, so it will automatically slide down. guided into the hole 16.

したがってカバー１４内に泥層がたまることによる悪臭
（特に夏場）を防止できる。Therefore, it is possible to prevent bad odors (especially in summer) caused by the accumulation of a mud layer inside the cover 14.

以上のように、この発明の回転式電気かみそり用内刃は
、内刃フレームの裏面にその凹部を被覆する乱流防止カ
バーを設け、このカバーに内刃に対応するひげ滑落下孔
を形成するとともに凹部の内側面を回転中心からの距離
が各落下孔に接近するにつれて漸次増大する構成とした
ため、内刃フレームの回転にるよ乱流を抑え、外刃から
のひげ屑飛散を防止できるとともに、カバー内にひげ屑
が溜ることなくスムーズに溜め部に落とされるという効
果がある。As described above, the inner cutter for a rotary electric shaver of the present invention is provided with a turbulence prevention cover that covers the concave portion on the back side of the inner cutter frame, and a hair sliding hole corresponding to the inner cutter is formed in this cover. At the same time, the inner surface of the recess has a structure in which the distance from the center of rotation gradually increases as it approaches each drop hole, which suppresses turbulence during the rotation of the inner cutter frame and prevents flying debris from the outer cutter. This has the effect that beard debris does not accumulate inside the cover and is smoothly dropped into the reservoir.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の回転式電気かみそりのヘッド部の断面図
、第２図はその改良案の要部断面図、第３図はこの発明
の一実施例の断面図、第４図はその内刃フレームの裏面
図、第５図はその乱流防止カバーを取除いた状態の裏面
図、第６図は第３図の部分拡大断面図である。 ７・・・・・・内刃フレーム、９・・・・・・板ばね、
１１・・・・・・内刃、１４・・・・・・乱流防止カバ
ー、１６・・・・・・泥層落下孔、Ｒ，Ｒ１，Ｒ２・・
・・・・半径。Fig. 1 is a cross-sectional view of the head of a conventional rotary electric shaver, Fig. 2 is a cross-sectional view of the main part of an improved proposal, Fig. 3 is a cross-sectional view of an embodiment of the present invention, and Fig. 4 is an internal sectional view of the head. FIG. 5 is a back view of the blade frame with the turbulence prevention cover removed, and FIG. 6 is a partially enlarged sectional view of FIG. 3. 7... Inner blade frame, 9... Leaf spring,
11...Inner blade, 14...Turbulence prevention cover, 16...Mud layer fall hole, R, R1, R2...
····radius.

Claims (1)

【特許請求の範囲】[Claims] １ 裏面に凹部を形成するとともに表裏に貫通する所定
数の内刃挿通孔を形成した内刃フレームと、この内刃フ
レームの凹部の底面に取付けられた押上ばねと、この押
上ばねに下端部が支持されて前記各内刃挿通孔に通され
た内刃と、前記内刃フレームの裏面に取付けられて前記
凹部を被覆するとともに前記各内刃の対応位置でしかも
縁部が前記凹部の内側面に接するように形成されたひげ
滑落下孔を形成した乱流防止カバーとを備え、前記凹部
の内側面において各ひげ屑落下孔間に対応する位置で回
転中心からの距離が一方のひけ滑落下孔に接近するにつ
れて漸次増大することを特徴とする回転式電気かみそり
用内刃。1. An inner cutter frame with a recess formed on the back surface and a predetermined number of inner cutter insertion holes penetrating the front and back sides, a push-up spring attached to the bottom of the recess of the inner cutter frame, and a lower end of the push-up spring. an inner cutter that is supported and passed through each of the inner cutter insertion holes; and an inner cutter that is attached to the back surface of the inner cutter frame to cover the recess, and that is located at a position corresponding to each of the inner cutters and whose edge is the inner surface of the recess. and a turbulence prevention cover with whisker debris falling holes formed so as to be in contact with the turbulence prevention cover, the distance from the center of rotation being at a position corresponding to between each whisker debris falling hole on the inner surface of the recessed portion. An inner blade for a rotary electric shaver, characterized in that the inner blade gradually increases in size as it approaches a hole.