JPH0214746Y2 - - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は内外刃を着脱可能に保持する電気かみ
そりのヘツド装置に関する。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a head device for an electric shaver that removably holds inner and outer cutters.

（従来の技術） 電気かみそり、特に丸刃三連型の電気かみそり
は刃枠を備え、この内部に回転規制した外刃と回
転自在な内刃からなる三組の内外刃を刃保持板に
よつて保持してなるヘツド装置を備える。ヘツド
装置は内部清掃のため本体に着脱可能であり、ま
た、内外刃も刃保持板を刃枠から取外すことによ
り刃枠に着脱可能である。(Prior art) Electric shavers, especially round-blade triple-type electric shavers, are equipped with a blade frame in which three pairs of inner and outer blades, consisting of an outer blade whose rotation is regulated and an inner blade that can freely rotate, are mounted on a blade holding plate. and a head device for holding the head. The head device is removable from the main body for internal cleaning, and the inner and outer blades are also removable from the blade frame by removing the blade holding plate from the blade frame.

従来、このようなヘツド装置において、刃枠に
対する刃保持板の着脱構造は刃保持板の中央に小
つまみを有するねじを回動自在に軸支し、このね
じを刃枠の裏面に螺合且つ締緩することにより行
つているのが一般的である。 Conventionally, in such a head device, the structure for attaching and detaching the blade holding plate from the blade frame is such that a screw having a small knob is rotatably supported in the center of the blade holding plate, and this screw is screwed into the back side of the blade frame. This is generally done by tightening and loosening.

あるいはまた、ねじを用いないタイプとしては
刃枠に刃保持板を押し込み、この後所定角度回転
せしめることによつて刃保持板を刃枠内に設けた
係止部分に係止し、抜脱を阻止すると同時に回転
方向のロツクを行つているものもある。 Alternatively, as a type that does not use screws, the blade holding plate is pushed into the blade frame, and then rotated by a predetermined angle to lock the blade holding plate to the locking part provided in the blade frame, making it impossible to remove it. Some devices also lock the rotational direction at the same time.

（考案が解決しようとする問題点） しかし、上述した従来のヘツド装置はねじ、或
いは複数の係止部分を設けるため比較的構造が複
雑となり、コストアツプ及び組立性の悪化を招
く。また、刃枠に対する刃保持板の着脱操作、つ
まり、ねじタイプのものは小つまみを何回も回す
必要があり、またねじを用いないタイプのものも
結果的には押込み操作と回転接作を必要とし、頻
繁に内外刃の清掃を行う場合における着脱操作が
煩雑化する不具合がある。(Problems to be Solved by the Invention) However, since the conventional head device described above is provided with screws or a plurality of locking parts, the structure is relatively complicated, leading to increased costs and poor assembly. In addition, the attachment and detachment of the blade holding plate from the blade frame requires turning a small knob many times with the screw type, and with the screwless type, pushing and rotational welding are required. However, when cleaning the inner and outer blades frequently, the attachment/detachment operation becomes complicated.

そこで本考案は斯かる従来の問題点を一掃し、
刃枠と刃保持板の着脱構造における単純化及び着
脱操作の容易化を図つた電気かみそりのヘツド装
置を提供するものである。 Therefore, this invention wipes out such conventional problems,
An object of the present invention is to provide a head device for an electric shaver in which the structure for attaching and detaching a blade frame and a blade holding plate is simplified and the attachment and detachment operations are facilitated.

（問題点を解決するための手段及び作用） 本考案は図面に示すように刃枠２に、回転規制
した外刃３と回転自在な内刃４を刃保持板５によ
つて着脱可能に保持してなる電気かみそり１のヘ
ツド装置１０に適用し、その特徴とするところは
刃枠２の側板部内壁２ａの周方向複数位置に係止
凹部６……を形成する。一方、好適実施例による
合成樹脂製刃保持板５を前記刃枠内部形状により
板面方向へ位置規制される形状に形成し、且つ前
記係止凹部６に係止する縁部に内側に設けた抜取
り部７によつて一端が自由端となる片持状の弾性
係止板部８を形成した点にある。(Means and effects for solving the problem) As shown in the drawings, the present invention detachably holds an outer cutter 3 whose rotation is restricted and an inner cutter 4 which is freely rotatable in a cutter frame 2 by means of a blade holding plate 5. The present invention is applied to a head device 10 of an electric shaver 1, and its feature is that locking recesses 6 are formed at a plurality of positions in the circumferential direction of the inner wall 2a of the side plate portion of the blade frame 2. On the other hand, the synthetic resin blade holding plate 5 according to the preferred embodiment is formed in a shape whose position is regulated in the plate surface direction by the internal shape of the blade frame, and is provided inside at the edge to be locked in the locking recess 6. The point is that a cantilever-shaped elastic locking plate portion 8 is formed with one end being a free end by the extraction portion 7.

これにより、刃保持板５の弾性係止板部８には
合成樹脂による弾性作用と、片持状に形成した形
状的作用により適度な弾性が付与される。したが
つて、刃枠２内へ刃保持板５を単に押し込むのみ
で弾性係止板部８は係止凹部６の内側に係止し固
定される。又刃枠２から刃保持板５を引張るのみ
で取外すことができる。 As a result, appropriate elasticity is imparted to the elastic locking plate portion 8 of the blade holding plate 5 due to the elastic action of the synthetic resin and the shape action of the cantilevered shape. Therefore, by simply pushing the blade holding plate 5 into the blade frame 2, the elastic locking plate portion 8 is locked and fixed inside the locking recess 6. Further, the blade holding plate 5 can be removed from the blade frame 2 by simply pulling it.

（実施例） 以下には本考案に係る好適な実施例を挙げ図面
を参照して詳述する。(Embodiments) Below, preferred embodiments of the present invention will be described in detail with reference to the drawings.

第１図は刃保持板の底面図、第２図は刃枠の底
面図、第３図は第２図中矢視Ａ−Ａ線における刃
枠および刃保持板の側面断面図、第４図は第３図
中円Ｂ部の拡大図、第５図はヘツド装置及び駆動
装置を示す分解斜視図、第６図は電気かみそりの
外観側面図である。 Figure 1 is a bottom view of the blade holding plate, Figure 2 is a bottom view of the blade frame, Figure 3 is a side sectional view of the blade frame and blade holding plate taken along the arrow A-A line in Figure 2, and Figure 4 is a side sectional view of the blade holding plate. FIG. 3 is an enlarged view of part B in the middle circle, FIG. 5 is an exploded perspective view showing the head device and drive device, and FIG. 6 is an external side view of the electric shaver.

先ず、刃保持板５は第１図のように合成樹脂製
にて一体形成し、全体を角部が丸い略正三角形に
形成する。中央部には手で握り易いようにその形
状を考慮した突起状のつまみ２０を一体成形し、
このつまみ２０と各角部の間にはそれぞれ円形の
抜取り部７を設ける。この抜取り部７によつて角
部における縁部には比較的幅の狭い細板部８ａを
形成する。 First, as shown in FIG. 1, the blade holding plate 5 is integrally formed of synthetic resin, and the whole is formed into a substantially equilateral triangle with rounded corners. In the center, a protruding knob 20 is integrally molded with its shape taken into consideration so that it is easy to grip with the hand.
A circular extraction portion 7 is provided between this knob 20 and each corner. This cut-out portion 7 forms a thin plate portion 8a with a relatively narrow width at the edge of the corner portion.

さらにまた第１図中角部中央から右側に偏した
位置において細板部８ａの一部を分断するように
抜取り部７を延設してギヤツプ７ａを形成し、結
局一端が自由端８ｂとなる片持状の弾性係止板部
８を形成する。このように片持状の係止板部８を
形成することにより比較的硬質の合成樹脂であつ
ても適度な弾性を付与できる。また、係止板部８
の外縁部、つまり係止凹部６に対する当接面は刃
保持板５の板面に対し傾斜面５ａに形成する。な
お、当該当接面に対し反対側となる縁部の面にも
傾斜面５ｂを形成し刃枠２への押し込みがスムー
ズに行えるように考慮する。一方抜取り部７の内
部にはさらに内刃４を直接保持する保持リング２
１を設ける。この保持リング２１は抜取り部７に
同軸上配するとともに、これより小径とし、夫々
２つの支持片２２……を介して一体成形する。な
お、保持リング２１は刃保持板５より厚さを小と
し、下側（第３図左側）へ偏寄して設ける。 Furthermore, a gap 7a is formed by extending a cut-out part 7 so as to divide a part of the thin plate part 8a at a position offset to the right from the center of the middle corner part in FIG. 1, and one end eventually becomes a free end 8b. A cantilevered elastic locking plate portion 8 is formed. By forming the cantilevered locking plate portion 8 in this manner, even if the synthetic resin is relatively hard, it can be imparted with appropriate elasticity. In addition, the locking plate portion 8
The outer edge portion, that is, the contact surface for the locking recess 6 is formed into an inclined surface 5a with respect to the plate surface of the blade holding plate 5. Note that an inclined surface 5b is also formed on the edge surface opposite to the contact surface so that the blade can be pushed into the blade frame 2 smoothly. On the other hand, a retaining ring 2 that directly holds the inner cutter 4 is provided inside the extracting portion 7.
1 will be provided. This retaining ring 21 is disposed coaxially with the extraction part 7, has a diameter smaller than this, and is integrally molded with two supporting pieces 22 interposed therebetween. Note that the retaining ring 21 is smaller in thickness than the blade retaining plate 5, and is provided biased toward the lower side (left side in FIG. 3).

次に、刃枠２は第２図及び第５図のように、刃
保持板５と相似形状の上板部３０とこの上板部３
０を囲む側板部３１からなり下方開放のキヤツプ
状に一体形成する。上板部３０には前記抜取り部
７に対応して３つの円形の外刃抜出孔３２……を
形成する。この突出孔３２には裏側から外刃３を
挿入する。挿入した際外刃３に形成した係止鍔３
ａが上板部３０の内壁に係止するとともに係止鍔
３ａの非円形形状によつて回り止めされる。一
方、側板部３１はその内壁の周面形状が前記刃保
持板５の外周の形状に略一致し、刃枠２の内部へ
刃保持板５を入れた際、これに嵌合し板面方向へ
位置規制される。なお、刃枠２内部に突起等を形
成し刃保持板５の位置規制を行つてもよい。 Next, as shown in FIGS. 2 and 5, the blade frame 2 includes an upper plate part 30 having a similar shape to the blade holding plate 5, and this upper plate part 3.
It consists of a side plate part 31 that surrounds 0 and is integrally formed into a cap shape that is open from below. Three circular outer cutter extraction holes 32 are formed in the upper plate portion 30 in correspondence with the extraction portions 7. The outer cutter 3 is inserted into this protrusion hole 32 from the back side. Locking flange 3 formed on the outer cutter 3 when inserted
a is locked to the inner wall of the upper plate portion 30 and is prevented from rotating by the non-circular shape of the locking collar 3a. On the other hand, the peripheral surface shape of the inner wall of the side plate portion 31 substantially matches the shape of the outer peripheral surface of the blade holding plate 5, so that when the blade holding plate 5 is inserted into the inside of the blade frame 2, it fits therein and the side plate portion 31 is fitted in the direction of the plate surface. location is regulated. Note that a projection or the like may be formed inside the blade frame 2 to regulate the position of the blade holding plate 5.

また、側板部３１の内壁２ａにおいて各角部に
位置する部分には縦方向に離間した係止突起３３
……，３４……を設け、これにより一対の係止凹
部６……，３５……を設ける。係止凹部６……，
３５……のうち上板部３０側の係止凹部６には第
４図のように前記弾性係止板部８が入り込んで係
止し、他方の係止凹部３５には第５図に示す駆動
装置５０側の係止ポスト５１の係止爪５２が係止
する。 Further, locking protrusions 33 spaced apart in the vertical direction are provided at portions located at each corner of the inner wall 2a of the side plate portion 31.
..., 34... are provided, thereby providing a pair of locking recesses 6..., 35.... Locking recess 6...,
The elastic locking plate part 8 enters and locks into the locking recess 6 on the upper plate part 30 side as shown in FIG. 4, and into the other locking recess 35 as shown in FIG. The locking claw 52 of the locking post 51 on the drive device 50 side locks.

次に、ヘツド装置１０における刃の着脱操作に
ついて第３図を参照して説明する。 Next, the operation of attaching and detaching the blade in the head device 10 will be explained with reference to FIG.

先ず、刃枠２の外刃突出孔３２に裏側から外刃
３を挿入し、この外刃３の裏側には内刃４を重ね
る。そして、刃保持板５のつまみ２０を手で持つ
て刃枠２の内部へ入れ、そのまま押し込めば各係
止突起３４，３３により弾性係止板部８は内側へ
撓み、各突起３４，３３を乗り越えて第４図のよ
うに係止凹部６に係止する。この際傾斜面５ｂの
作用でスムースに嵌め込むことができる。また反
対側の傾斜面５ａは係止突起３３に当接するも当
該傾斜面５ａ及び係止板部８の弾性作用によつて
刃保持板５は内刃４を保持する方向へ付勢され、
確実に装着できる。よつて、刃保持板５はその外
周部が側板部３１の内壁２ａによつて軸（回転
軸）垂直方向（板面方向）への位置規制がされ、
且つ係止凹部６と係止板部８の係止によつて軸方
向への位置規制がされ、確実に固定する。なお、
刃保持板５を取外すときにはつまみ２０を手で持
ちそのまま引つ張ればよい。 First, the outer cutter 3 is inserted into the outer cutter protruding hole 32 of the cutter frame 2 from the back side, and the inner cutter 4 is stacked on the back side of the outer cutter 3. Then, by holding the knob 20 of the blade holding plate 5 with your hand and inserting it into the blade frame 2, the elastic locking plate portion 8 is bent inward by the respective locking protrusions 34, 33, and the respective protrusions 34, 33 are Climb over and lock into the locking recess 6 as shown in FIG. At this time, it can be fitted smoothly due to the effect of the inclined surface 5b. Further, although the sloped surface 5a on the opposite side contacts the locking protrusion 33, the blade holding plate 5 is urged in the direction of holding the inner cutter 4 due to the elastic action of the sloped surface 5a and the locking plate portion 8.
Can be installed securely. Therefore, the position of the outer peripheral portion of the blade holding plate 5 in the direction perpendicular to the axis (rotation axis) (in the direction of the plate surface) is regulated by the inner wall 2a of the side plate portion 31.
Further, the position in the axial direction is regulated by the locking between the locking recess 6 and the locking plate 8, thereby ensuring secure fixation. In addition,
When removing the blade holding plate 5, it is sufficient to hold the knob 20 in your hand and pull it.

次に、このようなヘツド装置を備えた電気かみ
そりの構成について第５図及び第６図を参照して
説明する。 Next, the structure of an electric shaver equipped with such a head device will be explained with reference to FIGS. 5 and 6.

第５図において、５３は駆動部保持台である。
下面にはモータ５４を保持し、シヤフトを上面に
突出させてピニオン５５を軸止する。また保持台
５３の上面にはピニオン５５の周りに３本のピン
５６……を等間隔で対峙起設する。そして各ピン
５６……には上部のポール部５７ａが軸方向へ変
位且つ左右方向へ揺動するように弾性支持された
駆動ポール装置５７を回動自在に軸支する。保持
台５３の上方には刃受台５８を配し、この刃受台
５８に設けた複数の係止アーム５９……を上記保
持台５３の外縁部に係止して一体化する。この際
保持台５３と刃受台５８の間にはフエルト保持板
６０を介在せしめるとともにこの保持板６０と刃
受台５８の間にはフエルト６１……を介在せしめ
る。以上で一体化した駆動装置５０を構成し、こ
のようにして組上がつたものを第６図に示す電気
かみそり１の本体７０へ組付ける。 In FIG. 5, 53 is a drive unit holding stand.
A motor 54 is held on the lower surface, and a pinion 55 is fixed on the shaft by protruding to the upper surface. Further, on the upper surface of the holding table 53, three pins 56 are arranged facing each other at equal intervals around the pinion 55. Each of the pins 56 rotatably supports a drive pole device 57, which is elastically supported so that the upper pole portion 57a can be displaced in the axial direction and rocked in the left and right directions. A blade holder 58 is disposed above the holder 53, and a plurality of locking arms 59 provided on the blade holder 58 are locked to the outer edge of the holder 53 and integrated. At this time, a felt holding plate 60 is interposed between the holding stand 53 and the blade holder 58, and a felt 61 . . . is interposed between the holding plate 60 and the blade holder 58. The integrated drive device 50 is constructed as described above, and the thus assembled device is assembled into the main body 70 of the electric shaver 1 shown in FIG. 6.

またフエルト保持板６０はその素材を選択し、
適度な弾性を有する前記係止ポスト５１をその外
縁部から上方へ延設し、この係止ポスト５１……
の上端に前記係止爪５２……を設ける。これによ
り刃受台５８へ本考案に係るヘツド装置１０、つ
まり刃枠２を被冠した際、係止爪５２……と係止
凹部３５は相係止し、固定されるとともに、クリ
ツク式に着脱可能となる。なにお、ヘツド装置１
０を刃受台５８へ装着する際、ポール部５７ａは
保持リング２１内を挿通し、その先端が内刃４底
面に係合するとともに内刃４を外刃３に圧接する
ように付勢する。 In addition, the material of the felt holding plate 60 is selected,
The locking post 51 having appropriate elasticity extends upward from its outer edge, and the locking post 51...
The locking pawl 52 is provided at the upper end of the holder. As a result, when the head device 10 according to the present invention, that is, the blade frame 2, is mounted on the blade holder 58, the locking claws 52... and the locking recess 35 are interlocked and fixed, and can be clicked. It can be attached and detached. What, head device 1?
0 to the blade holder 58, the pawl portion 57a is inserted through the retaining ring 21, and its tip engages the bottom surface of the inner cutter 4 and urges the inner cutter 4 to press against the outer cutter 3. .

なお、第６図において、７１は髪切部、７２は
電源スイツチである。 In addition, in FIG. 6, 71 is a hair cutting section, and 72 is a power switch.

このような電気かみそりは全体に組立が容易
で、コストダウンを図るための思想を包含してい
る。 This type of electric shaver is easy to assemble as a whole and incorporates ideas for reducing costs.

以上、実施例を説明したが、本考案はこのよう
な実施例に限定されるものではない。例えば刃保
持板は細い棒体を網目状に組合せたものでもよ
い。さらに刃保持板の形状も任意である。また、
本ヘツド装置は丸刃三連型の電気かみそりに用い
て好適であるが、他の任意の丸刃複連型等に同様
に適用できる。 Although embodiments have been described above, the present invention is not limited to these embodiments. For example, the blade holding plate may be a combination of thin rods in a mesh pattern. Furthermore, the shape of the blade holding plate is also arbitrary. Also,
Although this head device is suitable for use in a triple round blade type electric shaver, it can be similarly applied to any other multiple round blade type.

その他細部の形状、構造、数量、配列等におい
て本考案の要旨を逸脱しない任意変更実施は本考
案範囲に許容される。 Any other changes in the shape, structure, quantity, arrangement, etc. of details that do not depart from the gist of the present invention are permitted within the scope of the present invention.

（考案の効果） このように、本考案に係る電気かみそりのヘツ
ド装置は刃枠に、回転規制した外刃と回転自在な
内刃を刃保持板によつて着脱可能に保持してなる
電気かみそりのヘツド装置において、刃枠の側板
部内壁の周方向複数位置に係止凹部を形成すると
ともに、刃保持板を前記刃枠内部形状により板面
方向へ位置決めされる形状に形成し、且つ前記係
止凹部へ係止する縁部に内側に設けた抜取り部に
よつて一端が自由端となる片持状の弾性係止板部
を形成してなるため単に刃保持板を押圧又は引張
するのみで刃枠に対し装着又は離脱せしめること
ができ、清掃等による刃の取外し、取付けをワン
タツチできわめて容易に行うことができる。(Effect of the invention) As described above, the electric shaver head device according to the invention is an electric shaver in which the outer blade whose rotation is regulated and the rotatable inner blade are removably held in the blade frame by the blade holding plate. In the head device, locking recesses are formed at a plurality of positions in the circumferential direction of the inner wall of the side plate portion of the blade frame, and the blade holding plate is formed in a shape that is positioned in the plate surface direction by the internal shape of the blade frame, and A cantilevered elastic locking plate part with one end free is formed by a pull-out part provided on the inside of the edge that locks into the locking recess, so the blade holding plate can be simply pressed or pulled. It can be attached to or detached from the blade frame, and removal and attachment of the blade for cleaning etc. can be performed extremely easily with one touch.

また、好適な実施替様によつて刃保持板は合成
樹脂による一体成形で製作することができ、ねじ
又はロツク部材等の金属部品、又は別部材は全く
不用である。このため低コスト化、組立容易化に
も大きく貢献できる。 Further, according to a preferred embodiment, the blade retaining plate can be manufactured in one piece from synthetic resin, and metal parts such as screws or locking members, or separate parts are completely unnecessary. Therefore, it can greatly contribute to cost reduction and ease of assembly.

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

図面は本考案に係る実施例を示し、第１図は刃
保持板の底面図、第２図は刃枠の底面図、第３図
は第２図中矢視Ａ−Ａ線における刃枠及び刃保持
板の側面断面図、第４図は第３図中円Ｂ部の拡大
図、第５図はヘツド装置及び駆動装置を示す分解
斜視図、第６図は電気かみそりの外観側面図であ
る。 尚図面中、１……電気かみそり、２……刃枠、
２ａ……側板部内壁、３……外刃、４……内刃、
５……刃保持板、５ａ，５ｂ……傾斜面、６……
係止凹部、７……抜取り部、８……弾性係止板
部、１０……ヘツド装置、２１……保持リング。 The drawings show an embodiment of the present invention, in which Fig. 1 is a bottom view of the blade holding plate, Fig. 2 is a bottom view of the blade frame, and Fig. 3 is a view of the blade frame and blade taken along the arrow A-A line in Fig. 2. FIG. 4 is an enlarged view of the middle circle B in FIG. 3, FIG. 5 is an exploded perspective view showing the head device and drive device, and FIG. 6 is an external side view of the electric shaver. In addition, in the drawing, 1... electric razor, 2... blade frame,
2a...Inner wall of side plate part, 3...Outer blade, 4...Inner blade,
5... Blade holding plate, 5a, 5b... Inclined surface, 6...
Locking recess, 7... Removal portion, 8... Elastic locking plate portion, 10... Head device, 21... Retaining ring.

Claims (1)

【実用新案登録請求の範囲】 １ 刃枠に、回転規制した外刃と回転自在な内刃
を刃保持板によつて着脱可能に保持してなる電
気かみそりのヘツド装置において、刃枠の側板
部内壁の周方向複数位置に係止凹部を形成する
とともに、刃保持板を前記刃枠内部形状により
板面方向へ位置決めされる形状に形成し、且つ
前記係止凹部へ係止する縁部に内側に設けた抜
取り部によつて一端が自由端となる片持状の弾
性係止板部を形成したことを特徴とする電気か
みそりのヘツド装置。 ２ 前記刃保持板は合成樹脂にて一体成形してな
ることを特徴とする実用新案登録請求の範囲第
１項記載の電気かみそりのヘツド装置。 ３ 前記抜取り部の内部に刃を保持する保持リン
グを設けたことを特徴とする実用新案登録請求
の範囲第１項又は第２項記載の電気かみそりの
ヘツド装置。 ４ 前記弾性係止板部の係止凹部に対する当接面
は刃保持板の板面に対して傾斜面に形成し、当
接時に刃保持板が刃を保持する方向へ付勢され
ることを特徴とする実用新案登録請求の範囲第
１項又は第２項記載の電気かみそりのヘツド装
置。 ５ 前記電気かみそりは丸刃三連型電気かみそり
であることを特徴とする実用新案登録請求の範
囲第１項、第２項、第３項又は第４項記載の電
気かみそりのヘツド装置。[Scope of Claim for Utility Model Registration] 1. In a head device for an electric shaver in which a blade frame has an outer blade whose rotation is regulated and a rotatable inner blade that are detachably held by a blade holding plate, the side plate of the blade frame Locking recesses are formed at a plurality of positions in the circumferential direction of the inner wall, and the blade holding plate is formed in a shape that is positioned in the plate surface direction by the internal shape of the blade frame, and an inner wall is formed at the edge to be locked in the locking recess. 1. A head device for an electric shaver, characterized in that a cantilever-shaped elastic locking plate portion is formed, one end of which is made free by a extraction portion provided in the head device. 2. The electric shaver head device according to claim 1, wherein the blade holding plate is integrally molded from synthetic resin. 3. The electric shaver head device according to claim 1 or 2, characterized in that a retaining ring for retaining the blade is provided inside the extraction portion. 4. The contact surface of the elastic locking plate portion with respect to the locking recess is formed to be an inclined surface with respect to the plate surface of the blade holding plate, so that the blade holding plate is biased in the direction of holding the blade at the time of contact. A head device for an electric shaver according to claim 1 or 2 of the claimed utility model registration. 5. The head device for an electric shaver according to claim 1, 2, 3 or 4, wherein the electric shaver is a triple round blade electric shaver.