JPH02147085A - Reciprocative electric shaver - Google Patents
Reciprocative electric shaverInfo
- Publication number
- JPH02147085A JPH02147085A JP63259800A JP25980088A JPH02147085A JP H02147085 A JPH02147085 A JP H02147085A JP 63259800 A JP63259800 A JP 63259800A JP 25980088 A JP25980088 A JP 25980088A JP H02147085 A JPH02147085 A JP H02147085A
- Authority
- JP
- Japan
- Prior art keywords
- outer cutter
- frame
- cutter
- cutting edge
- electric shaver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 claims description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 235000016838 Pomo dAdamo Nutrition 0.000 description 1
- 244000003138 Pomo dAdamo Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Landscapes
- Dry Shavers And Clippers (AREA)
Abstract
Description
本発明は往復式電気かみそり、殊に湾曲させた状態で収
り付けられる外刃の取付ｎ４造に関するものである。The present invention relates to a reciprocating electric shaver, and particularly to a mounting structure for an outer cutter that can be stored in a curved state.
往復式電気かみそりにおいて、多数の刃孔が設けられた
外刃を薄肉の屈曲自在な金属板で形成して、湾曲させた
状態で外刃フレームに取り付けたものがあるが、この取
り付けにあたり、従来は外刃フレームの内面側に係止部
を設けて、湾曲させた状態の外刃の両端を上記係止部に
係止していた。
米国特許第４，６６０，２８３号明細書に示されている
一例を第２２図に示す、図中１が外刃であり、両端は外
刃フレーム２の内面に形成された係止部２ａに係止され
ることによって外刃フレーム２に取り付けられている。
図中４は基台４１とこの基台４１に取り付けられた内刃
ブレード４０とからなる内刃である。Some reciprocating electric shavers have an outer blade with numerous blade holes made of a thin, flexible metal plate and are attached to the outer blade frame in a curved state. A locking portion was provided on the inner surface of the outer cutter frame, and both ends of the curved outer cutter were locked to the locking portion. An example shown in U.S. Pat. No. 4,660,283 is shown in FIG. It is attached to the outer cutter frame 2 by being locked. In the figure, reference numeral 4 denotes an inner cutter consisting of a base 41 and an inner cutter blade 40 attached to the base 41.
この場合、内刃が内面に摺接する外刃を肌に押し付ける
にあたって、横方向から内刃の往復動方向と交差する力
が与えられると、外刃フレームの内面と内刃との間に位
置する外刃の両端部に内刃からの荷重が加わってしまう
ものであり、外刃の両端部の摩耗が激しく、時として外
刃が破損してしまうことがあった。
また、外刃を湾曲させるにあたっての曲率半径は、外刃
の素材や内刃との密着度といった点からあまり小さくす
ることはできず、薄型化について制限があるが、外刃の
外側に更に外刃フレームがあることは、更に薄型化を困
難としており、顎下のように肌の凹凸が大きい部分の髭
剃りに際して、肌に当て難く、剃り残しを生ずることに
なる。
本発明はこのような点に鑑み為されたものであり、その
目的とするところは外刃の破損を招くことがなく、また
薄型化を図ることができる往復式電気かみそりを提供す
るにある。In this case, when the inner cutter presses the outer cutter against the skin in sliding contact with the inner cutter, if a force is applied from the side that crosses the reciprocating direction of the inner cutter, the inner cutter will be located between the inner cutter and the inner cutter frame. The load from the inner cutter is applied to both ends of the outer cutter, resulting in severe wear at both ends of the outer cutter, sometimes resulting in breakage of the outer cutter. In addition, the radius of curvature when curving the outer cutter cannot be made too small due to the material of the outer cutter and the degree of adhesion with the inner cutter, and there are restrictions on thinning the outer cutter. The presence of the blade frame makes it even more difficult to make the blade thinner, and when shaving in areas where the skin is uneven, such as under the chin, it is difficult to apply the blade to the skin, resulting in unshaved areas. The present invention has been made in view of these points, and its object is to provide a reciprocating electric shaver that does not cause damage to the outer cutters and can be made thinner.
しかして本発明は、湾曲させた外刃の両端を外刃フレー
ムに取着している電気かみそりにおいて、外刃フレーム
の外面側で外刃の両端部を外刃フレームに取り付けて、
外刃内面に摺接する内刃ブレードを基台に取り付けた内
刃と上記外刃の両端部との間に外刃フレームを介在させ
ていることに特徴を有している。
［作用］
本発明によれば、外刃の側面を肌に押し付けることで横
方向から力が加わっても、外刃の外刃フレームへの取付
部である両端部と内刃との間には外刃フレームが存在し
ていることから、外刃の両端部が内刃から大きな荷重を
受けることがなく、また強度上の問題で厚みをある程度
持たせておかなくてはならない外刃フレームが外刃の内
側に位置するために、外刃の外側に厚みのある部材を設
ける必要がなく、薄型化を図ることができるものである
。
［実施例］
以下本発明を図示の実施例に基づいて詳述すると、第１
図〜第３図に一実施例を示す。多数個の刃孔１０が形成
された外刃１は、薄肉の屈曲自在な金属板で形成されて
おり、その両端には夫々位置決め孔１１が複数個設けら
れている。
外刃１を保持する外刃フレーム２は、ここでは保持枠２
０と取付枠２５とから形成しである。保持枠２０はその
両側面の外面に複数個の位置決め突起２１ａ、２１ｂを
具備するとともに、貫通孔２２を具備し、更に両端面の
外面に連結部２３を備えているもので、外刃１はその両
端の位置決め孔１１内に保持枠２０の位置決め突起２１
ａ、２１ｂを挿入した状態で、各両端部に薄板状の取付
板３が被せられることで、湾曲した状態で保持枠２０に
取り付けられる。
ここにおける取付板３は、その両端に保持枠２０の貫通
孔２２に通されて保持枠２０の内面側で折り曲げられる
取付片３０を具備し、保持枠２０の外面との間で外刃１
を挟持するものであり、その保持枠２０との対向面側に
は複数個の位置決め突起２１ａ、２１ｂを逃げるための
溝３１を備えている。尚、この満３１は取付板３の表面
側で突条となるようにしであることから、取付板３の強
度向上にも寄与している。
一方、外刃フレーム２における取付枠２５は、モータや
このモータの回転を往復動に変換する駆動子５０等が収
納されている本体５に取り付けられるとともに、その両
端上部に形成されている係合溝２６に上記保持枠２０に
設けられた連結部２３が挿入されて、連結部２３におけ
るフック２４が係合することで保持枠２０が連結される
ものである。
しかしてこの電気かみそりでは、内刃ブレード４０と基
台４１と継手４２とから構成されて前記駆動子５０に取
り付けられる内刃４が、押し上げばね５１による付勢を
受けた状態で外刃１の内面に摺接することで、外刃１の
刃孔１０から内部へと導入した髭を切断するものであり
、そして第１図から明らかなように、外刃１の両端部と
、内刃４との間には、外刃フレーム２における保持枠２
０が介在していることから、第１図に矢印で示すように
、肌への押し付けに際して横方向から外刃１及び内刃４
に力が加えられても、内刃４における基台４１が保持枠
２０の上部内面に接することで、内刃４の図中左右方向
の動きに制限が加えられる。従って、外刃１に過大な負
荷が加わらず、外刃１の破損を生じることがないもので
ある。
尚、保持枠２０における位置決め突起２１ａ。
２１ｂのうち、両端の一対の位置決め突起２１ａ２１ａ
については、その高さを外刃１の厚みｔより大きくする
のはもちろん、第２図に示すように、取付板３の溝３１
内面との間の隙間ｇが外刃１の厚みｔ以下となるように
することで、外刃１の外れを防止している。また、この
位置決め突起２１ａ、２１ａを両端の２個としているの
は、上記隙間ｇが殆ど零か溝３１の深さより位置決め突
起２１ａの高さが大きくなった場合でも、取付板３がほ
ぼ平行に取り付けられるようにするためである。
更に、取付板３には、予め第３図に矢印Ａで示す反りを
設けておき、保持枠２０への取付時にこの反りが矯正さ
れるようにすることで、取付板３の取り付けにがたつき
が生じないようにしており、また取付板３は第２図に示
すように、保持枠２０よりも図中βで示す分だけ上方に
突出して、取付板３の上端付近で刃孔１０に導入された
髭が、保持枠２０の上端部との間でこじられて引っ張れ
てしまうことがないようにしている。
第４図及び第５図に示す実施例では、外刃フレーム２を
保持枠２０と取付枠２５との両者に分割せずに単一の部
材で形成し、そして横方向からの力を受けた時の内刃４
の動きは、外刃フレーム２の内面に小間隙で対向する継
手４２の部分が外刃フレーム２に当接することで制限す
るようにしている。外刃フレーム２が本体５と一体に形
成されていてもよい。図中２１は位置決め突起である。
第６図及び第７図に別の実施例を示す、ここでは外刃フ
レーム２の保持枠２０の外面への外刃１端部の収り付け
を、保持枠２０の外面から突設されて外刃１端部の取付
孔１２に挿通される複数個の突起２７の先端をヒートシ
ールすることによって行なっている。取付板３を不要と
しているわけである。取付強度をより高くするには、第
８図及び第９図に示すように、先端がヒートシールでか
しめられる突起２７の数を増やせばよく、図に示すよう
に、複数列で且つ各列において突起２７が位置がずれて
いるようにしておけば、突起２７の数を多くとることが
できる。
突起２７のヒートシールで外刃１の端部を外刃フレーム
２の外面に取り付けるにあたって、第１Ｏ図及び第１１
図に示すように、外刃１の端部外面に添わせる補強板２
８を用いてもよい。突起２７を外刃１の取付孔１２と補
強板２８の取付孔２つとに通した後、突起２７の先端を
ヒートシールでかしめるのである。この場合、外刃１の
端部の全域を補強板２８が押さえ込むために、外刃１に
外力が作用した時の外刃１の変形を抑えることができる
。
取付板３による外刃１の取り付けを採用する場合、第１
２図及び第１３図に示すように、取付板３から複数個の
ボス３５を突設して、これら外刃１の取付孔１２に挿通
されるボス３５を、保持枠２０に形成した取付孔３６に
圧入するようにしてもよい。
更には、第１４図及び第１５図に示すように、取付孔１
２が端部に形成されている外刃１を補強板２８と共に成
形型の中に入れて、保持枠２０を成形する同時成形（ア
ウトサー）・成形）により、保持枠２０外面への外刃１
端部の固定を行なってもよい。図中３８は成形時に保持
枠２０と一体に形成されて補強板２８の外面に係止する
かしめ部である。この場合、後加工が不要となるために
、安価に製造することができる。
このように外刃フレーム２の外面側に両端が固定される
外刃１として、外刃フレーム１に固定される面の形態が
第１６図に示すもの、つまり中央部１ａが予め半径Ｒの
円弧状断面を持つものとするとともに、中央部１ａの断
面２次モーメントを他の部分より小さくして曲げ剛性が
低くなるようにしておくことが好ましい。
曲げ剛性の変化は、たとえば中央部１ａにおける刃孔１
０間の桟の部分の幅を他の部分の桟の幅より狭くしてお
くことや、中央部１ａの板厚を他の部分の板厚より小さ
くしたり、刃孔１０が明いている割合である開口率を中
央部１ａで大きくなるようにすることによって得ること
ができる。
更に外刃１を外刃フレーム２に取り付けた時の外刃１の
形状は、第１７図に示すように、中央部力から端部キに
至るにつれて曲率半径ｒが漸次大きくなるようにしてお
くとともに、内刃４の内刃ブレード４０も同様に、中央
部から端部に至るにつれて曲率半径が漸次大きくなるよ
うにしておく。
この場合、前記駆動子５０内に配された押し上げばね５
１による内刃４の外刃１内面に向けてのばね付勢により
、内刃ブレード４０はその中央部から徐々に端部側へ接
触するようになり、押し上げ力が小さくてすむ、外刃１
の曲げ剛性を上述のように中央部で低くしておくならば
、更に押し上げ力を小さくしても、また外刃１の外刃フ
レーム２に装着した時点での中央部の曲率半径がかなり
小さくなっていても、外刃１と内刃ブレード４との密着
度を小さな押し上げ力で良好なものとすることができ、
切断性の向上を得ることができる上に、外刃１と内刃４
との間の摺動抵抗を低減させることができる。また、曲
率半径を小さくすることは、全体としての厚みを薄くで
きることになるが、本発明の場合、外刃１両端の外刃フ
レーム２への取り付けが外刃フレーム２の外面側でなさ
れることから、取付板３や補強板２８といった外刃フレ
ーム２の外面との間で外刃の両端部を挟持する挟持部材
を用いたとしても、これら挟持部材の厚みは薄くてよい
ものであり、外刃１の両端の外側に厚みのある部材がな
く、これ故に、薄型とすることがより有効となっている
ものであり、顎の下や喉仏周辺等の凹凸の入り込んだ部
位でも、剃り残しなく剃ることができる。
上記外刃１に対応する内刃ブレード４０の形状を具体的
に説明すると、内刃ブレード４０の刃先が描く曲線は、
第１８図に示すように、内刃ブレード４０の頂部をＸＹ
座標の原点とする場合、通常
Ｙ＝ａ−ｃｏｓｈ−Ｘ／ａ（ａは定数）で示される双曲
線形状や、高次の多項式で示される放物線形状とされる
が、ここでは外刃１への密着性を高めるために、放物線
形状とするとともに、刃先が形成されているＩ−Ｉ区間
が６次の多項式に近似する曲線とする。内刃ブレード４
０の刃先の接線の傾きをθとする時、この傾きθが内刃
ブレード４０の頂部から離れるにつれて単調増加する形
状、すなわち第１９図にＡで示す曲線が得られるように
するわけである。ＢやＣで示す曲線を描く場合には、図
中ア・イで示すところに変曲点があって、この部分にお
いて外刃１との間に隙間が生じてしまう。
さて、上述のように薄型化を図った外刃１を設ける場合
には、第２０図及び第２１図に示すように、外刃１′の
一面が本体５の前面と略面一であり、外刃１の他面が前
方側に大きく（α）傾いたものとしておくと、つまりは
外刃１の頂部が本体５の前面側に大きく寄ったところに
位置するものとしておくとよい。
最も切れ味が良くて切断効率が高くなっている頂部が、
通常本体５を持って髭剃りを行なうにあたり、本体５を
握る手の親指が当てられる本体５前面と略同じ位置にあ
ることから、使用者にしてみれば、頂部の位置を明確に
認識しつつ、髭剃り作業を行なうことができて、外刃１
の頂部を求める部位に確実に当てて髭を剃ることができ
るものであり、また、本体５の前面側に配されているト
リマー刃５５と外刃１頂部との間隔が短くなるために、
スイッチハンドル５６．５７を操作しながらの外刃１及
び内刃４による髭剃りと、トリマー刃５５との使い分け
が容易となる。第２１図中の５８はモータである。Accordingly, the present invention provides an electric shaver in which both ends of a curved outer cutter are attached to an outer cutter frame, in which both ends of the outer cutter are attached to the outer cutter frame on the outer surface side of the outer cutter frame.
It is characterized in that an outer cutter frame is interposed between the inner cutter, which has an inner cutter blade attached to a base that slides on the inner surface of the outer cutter, and both ends of the outer cutter. [Function] According to the present invention, even if force is applied from the side by pressing the side surface of the outer cutter against the skin, there will be no damage between the inner cutter and both ends of the outer cutter where it is attached to the outer cutter frame. Because the outer cutter frame exists, both ends of the outer cutter do not receive a large load from the inner cutter, and the outer cutter frame, which must be thick to a certain extent due to strength issues, is Since it is located inside the blade, there is no need to provide a thick member on the outside of the outer blade, and the blade can be made thinner. [Example] The present invention will be described in detail below based on the illustrated example.
An example is shown in FIGS. The outer cutter 1, in which a large number of cutter holes 10 are formed, is formed of a thin flexible metal plate, and a plurality of positioning holes 11 are provided at each end of the outer cutter 1. The outer cutter frame 2 that holds the outer cutter 1 is the holding frame 2 here.
0 and a mounting frame 25. The holding frame 20 is provided with a plurality of positioning protrusions 21a and 21b on the outer surface of both sides thereof, and is also provided with a through hole 22, and is further provided with connecting portions 23 on the outer surface of both end surfaces. Positioning protrusions 21 of the holding frame 20 are inserted into the positioning holes 11 at both ends thereof.
A, 21b are inserted, and the thin plate-like mounting plates 3 are placed on both ends of each end, so that they are attached to the holding frame 20 in a curved state. The mounting plate 3 here is provided with mounting pieces 30 at both ends thereof, which are passed through the through holes 22 of the holding frame 20 and bent on the inner surface side of the holding frame 20.
The surface facing the holding frame 20 is provided with grooves 31 for allowing the plurality of positioning protrusions 21a and 21b to escape. Incidentally, since this ridge 31 forms a protrusion on the surface side of the mounting plate 3, it also contributes to improving the strength of the mounting plate 3. On the other hand, the mounting frame 25 of the outer cutter frame 2 is attached to the main body 5 in which a motor, a driver 50 that converts the rotation of the motor into reciprocating motion, etc. are housed, and the mounting frame 25 is attached to the main body 5 in which a motor, a drive element 50 that converts the rotation of the motor into reciprocating motion, etc. are housed. The connecting portion 23 provided on the holding frame 20 is inserted into the groove 26, and the hook 24 in the connecting portion 23 engages, thereby connecting the holding frame 20. However, in this electric shaver, the inner cutter 4, which is made up of an inner cutter blade 40, a base 41, and a joint 42 and is attached to the driver 50, is pressed against the outer cutter 1 while being biased by a push-up spring 51. By slidingly contacting the inner surface, it cuts the whiskers introduced into the interior through the blade hole 10 of the outer cutter 1, and as is clear from FIG. 1, both ends of the outer cutter 1 and the inner cutter 4 In between, there is a holding frame 2 in the outer cutter frame 2.
0, the outer cutter 1 and the inner cutter 4 are inserted from the side when pressing against the skin, as shown by the arrows in FIG.
Even if a force is applied to the inner cutter 4, the base 41 of the inner cutter 4 comes into contact with the upper inner surface of the holding frame 20, so that the movement of the inner cutter 4 in the left-right direction in the drawing is restricted. Therefore, an excessive load is not applied to the outer cutter 1, and damage to the outer cutter 1 does not occur. Note that the positioning protrusion 21a on the holding frame 20. 21b, a pair of positioning protrusions 21a21a at both ends
In addition to making the height larger than the thickness t of the outer cutter 1, as shown in FIG.
The outer cutter 1 is prevented from coming off by making the gap g between it and the inner surface less than the thickness t of the outer cutter 1. Furthermore, the reason why there are two positioning protrusions 21a and 21a at both ends is that even if the gap g is almost zero or the height of the positioning protrusions 21a is greater than the depth of the groove 31, the mounting plate 3 can be kept almost parallel. This is to make it easier to install. Furthermore, the mounting plate 3 is provided with a warp in advance as shown by arrow A in FIG. As shown in FIG. 2, the mounting plate 3 protrudes upward from the holding frame 20 by an amount indicated by β in the figure, and the mounting plate 3 is fitted into the blade hole 10 near the upper end of the mounting plate 3. This prevents the introduced whiskers from being strained and pulled between them and the upper end of the holding frame 20. In the embodiment shown in FIGS. 4 and 5, the outer cutter frame 2 is formed of a single member without being divided into both the holding frame 20 and the mounting frame 25, and is subjected to lateral forces. Inner blade of time 4
The movement of the joint 42 is restricted by the portion of the joint 42 facing the inner surface of the outer cutter frame 2 with a small gap coming into contact with the outer cutter frame 2. The outer cutter frame 2 may be formed integrally with the main body 5. In the figure, 21 is a positioning protrusion. Another embodiment is shown in FIGS. 6 and 7, in which the end of the outer cutter 1 is installed on the outer surface of the holding frame 20 of the outer cutter frame 2 by using a protruding part from the outer surface of the holding frame 20. This is done by heat-sealing the tips of a plurality of protrusions 27 that are inserted into the attachment hole 12 at the end of the outer blade 1. This eliminates the need for the mounting plate 3. To increase the mounting strength, as shown in FIGS. 8 and 9, the number of protrusions 27 whose tips are heat-sealed can be increased. If the protrusions 27 are shifted in position, the number of protrusions 27 can be increased. When attaching the end of the outer cutter 1 to the outer surface of the outer cutter frame 2 by heat-sealing the protrusion 27, see Figures 1O and 11.
As shown in the figure, a reinforcing plate 2 attached to the outer surface of the end of the outer cutter 1
8 may be used. After the protrusion 27 is passed through the attachment hole 12 of the outer cutter 1 and the two attachment holes of the reinforcing plate 28, the tip of the protrusion 27 is caulked by heat sealing. In this case, since the reinforcing plate 28 presses down the entire end portion of the outer cutter 1, deformation of the outer cutter 1 when an external force is applied to the outer cutter 1 can be suppressed. When installing the outer cutter 1 using the mounting plate 3, the first
As shown in FIGS. 2 and 13, a plurality of bosses 35 are provided protruding from the mounting plate 3, and these bosses 35 are inserted into the mounting holes 12 of the outer cutter 1 through mounting holes formed in the holding frame 20. 36 may be press-fitted. Furthermore, as shown in FIGS. 14 and 15, the mounting holes 1
The outer cutter 1 with a reinforcing plate 28 formed on the end thereof is put into a mold together with the reinforcing plate 28, and the outer cutter 1 is formed on the outer surface of the holding frame 20 by simultaneous molding (outsur) and molding to form the holding frame 20.
The ends may be fixed. In the figure, reference numeral 38 denotes a caulking portion that is formed integrally with the holding frame 20 during molding and locks onto the outer surface of the reinforcing plate 28. In this case, since post-processing is not required, it can be manufactured at low cost. In the case of the outer cutter 1 whose both ends are fixed to the outer surface side of the outer cutter frame 2 in this way, the shape of the surface fixed to the outer cutter frame 1 is as shown in FIG. It is preferable to have an arcuate cross-section and to make the second moment of area of the central portion 1a smaller than that of the other portions so that the bending rigidity is lowered. For example, the change in bending rigidity is caused by the change in the blade hole 1 in the central portion 1a.
The width of the part of the crosspiece between 0 is made narrower than the width of the other part of the crosspiece, the thickness of the central part 1a is made smaller than the thickness of other parts, and the percentage of the blade hole 10 that is open is reduced. This can be obtained by increasing the aperture ratio at the central portion 1a. Furthermore, when the outer cutter 1 is attached to the outer cutter frame 2, the shape of the outer cutter 1 is such that the radius of curvature r gradually increases from the central part to the end part K, as shown in FIG. Similarly, the radius of curvature of the inner blade 40 of the inner cutter 4 is made to gradually increase from the center to the end. In this case, the push-up spring 5 disposed inside the driver 50
Due to the spring biasing of the inner cutter 4 toward the inner surface of the outer cutter 1 by the inner cutter 1, the inner cutter blade 40 comes into contact with the inner cutter blade 40 gradually from the center to the end side, and the push-up force is small.
If the bending rigidity of the blade is kept low at the center as described above, even if the push-up force is further reduced, the radius of curvature at the center of the outer cutter 1 when attached to the outer cutter frame 2 will be quite small. Even if it is, the degree of adhesion between the outer cutter 1 and the inner cutter blade 4 can be made good with a small pushing force,
In addition to improving cutting performance, the outer cutter 1 and inner cutter 4
The sliding resistance between the two can be reduced. Further, reducing the radius of curvature means that the overall thickness can be reduced, but in the case of the present invention, the attachment of both ends of the outer cutter 1 to the outer cutter frame 2 is done on the outer surface side of the outer cutter frame 2. Therefore, even if a clamping member such as the mounting plate 3 or the reinforcing plate 28 that clamps both ends of the outer cutter between the outer surface of the outer cutter frame 2 is used, the thickness of these clamping members may be thin, and the outer There is no thick member on the outside of both ends of the blade 1, which makes it more effective to make it thin, and it can be used even in uneven areas such as under the chin and around the Adam's apple without leaving any residue. You can shave. To specifically explain the shape of the inner blade 40 corresponding to the outer blade 1, the curve drawn by the cutting edge of the inner blade 40 is as follows:
As shown in FIG. 18, the top of the inner blade 40 is
When using the origin of the coordinates, it is usually a hyperbolic shape expressed by Y=a-cosh-X/a (a is a constant) or a parabolic shape expressed by a high-order polynomial. In order to improve adhesion, the blade has a parabolic shape, and the I-I section where the cutting edge is formed is a curve that approximates a sixth-order polynomial. Inner blade 4
When the slope of the tangent to the cutting edge at 0 is θ, the shape is such that the slope θ monotonically increases as it moves away from the top of the inner blade 40, that is, the curve shown by A in FIG. 19 is obtained. When drawing the curves indicated by B and C, there are inflection points at locations A and A in the figure, and a gap is created between the curves and the outer cutter 1 at these locations. Now, when providing the outer cutter 1 that is thinner as described above, one surface of the outer cutter 1' is approximately flush with the front surface of the main body 5, as shown in FIGS. 20 and 21. It is preferable that the other surface of the outer cutter 1 is tilted significantly (α) toward the front, that is, the top of the outer cutter 1 is positioned largely toward the front side of the main body 5. The top part is the sharpest and has the highest cutting efficiency.
Normally, when shaving while holding the main body 5, the thumb of the hand that grips the main body 5 is placed at approximately the same position as the front surface of the main body 5, so the user can clearly recognize the position of the top. , can perform shaving work, and has outer blade 1.
The trimmer blade 55, which is disposed on the front side of the main body 5, and the top of the outer cutter 1 can be shaved by reliably placing the top of the trimmer on the desired area.
It becomes easy to shave with the outer cutter 1 and inner cutter 4 and to use the trimmer blade 55 properly while operating the switch handles 56 and 57. 58 in FIG. 21 is a motor.
以上のように本発明においては、湾曲した外刃の両端部
を外刃フレームの外面側に取り付けて、外刃の両端部と
内刃との間に外刃フレームが介在するようにしているこ
とから、外刃の側面を肌に押し付けることで横方向から
力が加わっても、内刃の動きは外刃フレームで制限され
るものであり、このために外刃の外刃フレームへの取付
部である両端部が内刃から大きな荷重を受けることがな
く、外刃の摩耗が少なくなると同時に外刃の破損のおそ
れが少なくなっているものであり、また外刃の曲率半径
を小さくして薄型化を図る場合にも、厚みのある外刃フ
レームが外刃の両端部の外側に位置するものではないた
めに、薄型化を有効に実現することができるものである
。As described above, in the present invention, both ends of the curved outer cutter are attached to the outer surface side of the outer cutter frame, so that the outer cutter frame is interposed between both ends of the outer cutter and the inner cutter. Therefore, even if force is applied from the side by pressing the side of the outer cutter against the skin, the movement of the inner cutter is restricted by the outer cutter frame, and for this reason, the attachment part of the outer cutter to the outer cutter frame Both ends do not receive a large load from the inner cutter, reducing wear on the outer cutter and reducing the risk of damage to the outer cutter.In addition, the radius of curvature of the outer cutter has been reduced to create a thinner profile. Even when attempting to reduce the thickness of the outer cutter, the thick outer cutter frame is not located outside both ends of the outer cutter, so the thickness can be effectively reduced.
第１図は本発明一実施例の断面図、第２図は同上の部分
拡大断面図、第３図は同上の分解斜視図、第４図は他の
実施例の断面図、第５図は同上の分解斜視図、第６図は
更に他の実施例の断面図、第７図は同上の分解斜視図、
第８図は別の実施例の断面図、第９図は同上の分解斜視
図、第１０図は更に別の実施例の断面図、第１１図は同
上の分解斜視図、第１２図は他の実施例の断面図、第１
３図は同上の分解斜視図、第１４図は更に他の実施例の
断面図、第１５図は同上の斜視図、第１６図は同上に使
用する外刃の湾曲前の断面形状の一例を示す断面図、第
１７図は外刃の外刃フレームに取り付けた状態の曲率半
径の状態を示す説明図、第１８図及び第１９図は内刃ブ
レードの形状の説明図、第２０図は別の実施例の斜視図
、第２１図は同上の断面図、第２２図は従来例の断面図
であって、１は外刃、２は外刃フレーム、３は取付板、
４は内刃、２０は保持枠、２５は取付枠を示す。
代理人 弁理士 石 １）長 七
第１４図
第１６図
第１７図
外７１屋開長さ×
第旧図
Ｙ
第１９図
第２０図
手
続
補
正
書（自発）
昭和６３年１１月２６日
第２２図
２゜
昭和６３年特許願第２５９８００号
発明の名称
往復式電気かみそり
補正をする者
事件との関係
住 所
名 称
４、代理人
郵便番号Fig. 1 is a sectional view of one embodiment of the present invention, Fig. 2 is a partially enlarged sectional view of the same, Fig. 3 is an exploded perspective view of the same, Fig. 4 is a sectional view of another embodiment, and Fig. 5 is a sectional view of an embodiment of the present invention. An exploded perspective view of the same as above, FIG. 6 is a sectional view of still another embodiment, FIG. 7 is an exploded perspective view of the same as above,
Fig. 8 is a sectional view of another embodiment, Fig. 9 is an exploded perspective view of the same as above, Fig. 10 is a sectional view of yet another embodiment, Fig. 11 is an exploded perspective view of the same as above, and Fig. 12 is another embodiment. Cross-sectional view of the embodiment of
3 is an exploded perspective view of the same as the above, FIG. 14 is a sectional view of still another embodiment, FIG. 15 is a perspective view of the same, and FIG. 16 is an example of the cross-sectional shape of the outer cutter used in the above before bending. FIG. 17 is an explanatory diagram showing the state of the radius of curvature of the outer cutter when it is attached to the outer cutter frame, FIGS. 18 and 19 are explanatory diagrams of the shape of the inner cutter blade, and FIG. 20 is a separate diagram. 21 is a sectional view of the same as above, and FIG. 22 is a sectional view of a conventional example, in which 1 is an outer cutter, 2 is an outer cutter frame, 3 is a mounting plate,
4 is an inner blade, 20 is a holding frame, and 25 is a mounting frame. Agent Patent Attorney Ishi 1) Chief 7 Figure 14 Figure 16 Figure 17 Outside 71 Opening Length x Old Figure Y Figure 19 Figure 20 Procedural Amendment (Voluntary) November 26, 1988 No. 22 Figure 2゜1986 Patent Application No. 259800 Name of the invention Reciprocating electric shaver Relation to the case Address Name 4, Agent postal code
Claims (6)
いる電気かみそりにおいて、外刃フレームの外面側で外
刃の両端部を外刃フレームに取り付けて、外刃内面に摺
接する内刃ブレードを基台に取り付けた内刃と上記外刃
の両端部との間に外刃フレームを介在させていることを
特徴とする往復式電気かみそり。(1) In an electric shaver in which both ends of the curved outer cutter are attached to the outer cutter frame, both ends of the outer cutter are attached to the outer cutter frame on the outer surface side of the outer cutter frame, and slide into contact with the inner surface of the outer cutter. A reciprocating electric shaver characterized in that an outer cutter frame is interposed between an inner cutter having an inner cutter attached to a base and both ends of the outer cutter.
持部材との間で挟持されているとともに、挟持部材はそ
の上端が外刃フレームよりも外刃の頂部側に外刃外面に
沿って突出している請求項１記載の往復式電気かみそり
。(2) Both ends of the outer cutter are held between the outer surface of the outer cutter frame and a thin plate-shaped holding member, and the upper end of the holding member is positioned closer to the top of the outer cutter than the outer cutter frame, and the outer cutter surface The reciprocating electric shaver according to claim 1, wherein the reciprocating electric shaver protrudes along the .
外面に形成した位置決め突起を挿入係止するとともに、
位置決め突起が嵌まる溝を内面に備えた突条を具備する
取付板と、外刃フレームとの間で外刃の両端部を挟持し
ている請求項１記載の往復式電気かみそり。(3) Inserting and locking the positioning projections formed on the outer surface of the outer cutter frame into the positioning holes formed on both ends of the outer cutter,
2. The reciprocating electric shaver according to claim 1, wherein both ends of the outer cutter are held between the outer cutter frame and a mounting plate having a protrusion with a groove on its inner surface into which the positioning protrusion is fitted.
と、この取付枠に着脱自在であって外刃の両端が外面に
固着される保持枠とからなる請求項１記載の往復式電気
かみそり。(4) The reciprocating type according to claim 1, wherein the outer cutter frame comprises a mounting frame that is detachably attached to the main body, and a holding frame that is detachable from the mounting frame and has both ends of the outer cutter fixed to the outer surface. electric razor.
面が本体の前面側に傾斜している請求項１記載の往復式
電気かみそり。(5) The reciprocating electric shaver according to claim 1, wherein one surface of the outer blade is substantially flush with the front surface of the main body, and the other surface of the outer blade is inclined toward the front surface of the main body.
且つ予め湾曲形成されたものである請求項１記載の往復
式電気かみそり。(6) The reciprocating electric shaver according to claim 1, wherein the outer cutter has a lower bending rigidity at the center than other parts and is pre-curved.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63-15065 | 1988-01-26 | ||
| JP1506588 | 1988-01-26 | ||
| JP20756088 | 1988-08-22 | ||
| JP63-207560 | 1988-08-22 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4327290A Division JPH0347291A (en) | 1990-02-23 | 1990-02-23 | Cutting edge of reciprocating type electric shaver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02147085A true JPH02147085A (en) | 1990-06-06 |
| JPH0548714B2 JPH0548714B2 (en) | 1993-07-22 |
Family
ID=27280863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63259800A Granted JPH02147085A (en) | 1988-01-26 | 1988-10-15 | Reciprocative electric shaver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02147085A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772680A (en) * | 1980-10-21 | 1982-05-07 | Tokyo Electric Co Ltd | Electric razor |
-
1988
- 1988-10-15 JP JP63259800A patent/JPH02147085A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772680A (en) * | 1980-10-21 | 1982-05-07 | Tokyo Electric Co Ltd | Electric razor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548714B2 (en) | 1993-07-22 |
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|---|---|---|---|
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