JPH07185143A - Electric shaver - Google Patents

Abstract

PURPOSE:To provide an electric shaver than has higher handling efficiency for shaving a desired portion and has higher cutting performance. CONSTITUTION:It is assumed that the device is an electric shaver in which a shaving head H is formed so as to be able to swing in the width direction of a unit case 75. An engaging surface 8b which limits the swing is formed at the head H and a head-lamiting holder 91 which is able to move between the limited position and the unlimited position and is able to operate externally is formed at the unit case 75. A stopper 107, which can be connected to and disconnected from the engaging surface 8b when the head-limiting holder 91 is moved to the limited position, is disposed between the head-limiting holder 91 and the engaging surface 8b. This limits the swing angle theta of the shaving head H when shaving a portion under the nose, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of swinging a shaving head for shaving by reciprocating a plurality of inner blades slidably contacting the inner surface of the outer blade in the longitudinal direction of the body case. For electric razors mounted on.

[0002]

2. Description of the Related Art An electric shaver having a swinging shaving head is described in Japanese Patent Laid-Open No. 64-56089. In this electric shaver, a switch knob having a trimmer device at its upper end is attached to the main body case so as to be vertically slidable, and the switch knob can select the first to fourth switch positions by its sliding operation.

By selecting the first switch position, the motor built in the main body case is turned off, and by selecting the second switch position set above the first switch position,
The motor can be turned on and started. By selecting the third switch position which is set above the second switch position, the shaving head is arranged in the detent position deviated from the protruding position of the trimmer device in the activated state. The selection of the fourth switch position, which is set above the third switch position, causes the trimmer device to be projected and actuated.

In the first and second switch positions, the shaving head can freely swing and swing, and in the third and fourth switch positions, the shaving head is held in the detent position and swings. Movement is blocked.

This electric shaver has a third switch knob.
Since the shaving head can be slid to the switch position and locked so as not to swing and swing, the shaving head can be used in this state in the same manner as a non-swing and swing type electric shaver. Therefore, it is advantageous as compared with the case where the shaving head swings and swings largely when aiming at a portion such as a portion under the nose (in the person) or directly under the lower lip.

[0006]

By the way, in the case where the shaving head is fixed so as not to inadvertently swing so as to carry out the aimed shaving as described above, it is most suitable to fit the body case under the nose or the like. It is necessary to operate so that the angle, that is, the apex of the outer blade (maximum cutting efficiency part) hits the skin at right angles. However, it is difficult to obtain such an optimum angle in each case depending on the portion to be shaved, and therefore, there is a problem that the operability at the time of shaving is not good and the beard cutting performance is poor.

An object of the present invention is to obtain an electric razor capable of improving the operability and the whisker cutting performance when aiming and shaving using a shaving head which can swing and swing.

[0008]

To achieve the above object, an electric shaver according to the present invention includes a body case having a pair of support protrusions and a body case located between the pair of support protrusions. A shaving head that is swingably swingable in the thickness direction, a head limiting knob that is operably attached to the main body case from the outside, and is movable between a limiting position and a non-limiting position, and this head. A swing limit engaging portion provided on either one of the limit knob and the shaving head, and movably provided between the shaving head and the head limit knob, or the head limit knob. The shaving head is provided on the other one of the shaving heads, and when the head limiting knob is arranged at the limiting position, the swinging limit engaging portion can be brought into contact with and separated from the shaving head. It is obtained by including a stopper for limiting small swing angle of the shaving head.

[0009]

In the electric razor of the present invention, when shaving under the nose or the like, the head limiting knob is moved from the non-limiting position to the limiting position for use. Due to the movement of the head limiting knob, the swinging limiting engaging portion and the stopper come into close proximity or contact with each other, and the shaving head is not swung inadvertently so as not to be unintentionally fixed, and the small swinging movement of the shaving head is prevented. The swinging is allowed and the swinging swinging of the shaving head is limited by the contact between the swinging limiting engaging portion and the stopper.

As described above, since the swinging swinging angle of the shaving head can be restricted to be smaller than the usual free swinging swinging angle, when shaving under the nose, etc.
The shaving head can be swung slightly within the limited swinging swing angle. Therefore,
Due to the swing, regardless of the direction of the main body case, it is possible to hit the shaving head at a right angle to the portion to be shaving.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. 1 to 5 and 21 to 23
1 and 1 are a pair of outer blades arranged in parallel, and these outer blades 1 and 1 are each formed of a flexible thin metal plate in which mesh-like whisker introducing holes 2 are formed. Outer blade 1, 1
Has an arcuate cross section, and has mounting holes 3 formed at one side edge in the width direction.

The one side edges of the outer blades 1 and 1 are fixed to the pair of outer blade mounting plates 4 and 4, and the other side edges are fixed to the middle frame 5. Locking bosses 6 are formed on the outer blade mounting plates 4 and 4 and the inner frame 5. The mounting holes 3 of the outer blades 1 and 1 are caulked to the outer blade mounting plates 4 and 4 and the locking bosses 6 of the middle frame 5, whereby the pair of outer blades 1 and 1 and the outer blade mounting plate 4, 4 and the middle frame 5 are integrally connected, and these constitute the outer blade body 7.

The outer blade body 7 is attached to the outer blade holder 8. The outer blade holder 8 has a frame shape, and the outer blade body 7 is formed on the inner side surface of the side wall extending in the longitudinal direction as shown in FIG.
Retaining grooves 9, 9 into which the outer blade mounting plates 4, 4 are fitted are formed. The outer blade mounting plates 4 and 4 of the outer blade body 7 are provided with the holding grooves 9 and 9.
The outer blade mounting plates 4 and 4 are fitted into the holding grooves 9 and 9
It can slide up and down (in Fig. 1). As shown in FIG. 3, the middle frame 5 has the engagement holes 10 formed at both ends in the longitudinal direction thereof fitted into the fitting boss 11 formed on the lower surface of the central portion of the end wall 8a of the outer blade holder 8, It is fixed to the outer blade holder 8 by caulking the fitting boss 11.

As shown in FIGS. 19 to 23, at the lower portion (in FIG. 19 and the like) of one end wall 8a of the outer blade holder 8, for example, a part of the lower side surface which faces the neck is utilized. An engagement surface 8b is provided as a swing limiting engagement portion.

As shown in FIGS. 5 and 6, shaft holes 12, 12, which serve as the center of rotation of the outer cutter body 7, are formed on the outer surface of both end walls 8a of the outer cutter holder 8. These shaft holes 12,
Rotation supporting bases 13 and 13 are engaged with 12 respectively.
That is, support shafts 14 and 14 which are fitted into the shaft holes 12 and 12 are provided in a projecting manner on mutually facing surfaces of the rotation support bases 13 and 13, and the outer blade holder 8 is fitted by these support shafts 14 and 14. Is rotatably supported. Therefore, the outer blade holder 8
And the outer blade body 7 attached to the support shaft 1 is
It is provided so as to be rotatable around 4 and 14 as a swing center O. This rotation is performed in a direction that intersects with the longitudinal direction of the inner blade, which will be described later, so that so-called swinging and swinging is performed along the thickness direction of the main body case, which will be described later.

As shown in FIG. 6 and the like, a neutral biasing spring 15 is attached to at least one of the rotation supporting bases 13. The neutral urging spring 15 is, for example, a wire bent into an arc shape and both ends thereof are bent and extended so as to be substantially parallel to each other, and both ends thereof are formed into a pair of arc holes 16 and 16 ( (See FIGS. 6 and 8). Both ends of these neutral biasing springs 15 are in contact with the lower end surface of one end wall 8 a of the outer blade holder 8.

Therefore, when the outer cutter holder 8 swings and swings, one end wall 8a of the outer cutter holder 8 pushes one end of the neutral urging spring 15 so that it is elastically deformed.
With the release of the swinging external force of the outer blade holder 8, the elastic restoring force of the neutral biasing spring 15 acts on the outer blade holder 8 to automatically return the outer blade holder 8 to the neutral position, and thus the outer blade body 7
Can always be held in the neutral position.

As shown in FIG. 6, a plurality of fixing bosses 18 are formed on the surfaces of the rotation supporting bases 13 that do not face each other. The rotary support bases 13 and 13 are fixed to the outer blade case 20 by using the fixed bosses 18 ... The outer blade case 20 has a saddle-shaped frame shape in which the surface of a synthetic resin product or a die-cast product is plated, and is fixed to the end wall in the longitudinal direction as shown in FIGS. The holes 21 ... Are formed.

Three fixing holes 21 ... Are formed in each of the end walls, and the fixing hole bosses 1 of the rotation supporting bases 13, 13 are formed.
By fixing 8 ..., these fixed bosses 18
... and the fixing holes 21 ... are engaged. The tips of the fixed bosses 18 are caulked, whereby the rotary support 1
3, 13 are fixed to the outer blade case 20.

As shown in FIG. 5, FIG. 6, and FIG. 8, elastic tongues 22 and 22 are formed on the rotation supporting bases 13 and 13, and the elastic tongues 22 and 22 are engaged at their tips. The pawls 23, 23 are formed. These locking claws 23, 23
Is locked at the lower end of the central portion of the end wall of the outer blade case 20.

The outer blade case 20 is detachably attached to a support frame 30 made of zinc die cast and having a surface plated. The support frame 30 has a fixing screw 31 ...
It is fixed to the relay connection body 32 made of synthetic resin via. The connecting body 32 is fixed to the main body case 75 via other fixing screws 33 ...
As shown in FIGS. 1 to 23, it has a stopper through hole 32a.

The main body case 75 is formed by connecting a front case and a rear case made of synthetic resin so that their opening surfaces are aligned with each other. In this case 75, FIG. 2 and FIGS.
Motor 70 and secondary battery 72 as shown in FIG.
However, each of them is vertically arranged and arranged in the width direction of the main body case 75, and a circuit board (not shown) on which electric parts and the like are mounted is also incorporated.

Support projections 34, 34 projecting to the front side are formed at both ends of the support frame 30, and the outer blade case 20 is detachably fitted between the projections 34, 34. Mounting holes 35, 35 are formed in the pair of support protrusions 34, 34, respectively, and when the outer blade case 20 is fitted between the support protrusions 34, 34, the rotation support fixed to the outer blade case 20 is provided. The locking claws 23, 23 of the bases 13, 13 are adapted to be hooked on the upper sides of the mounting holes 35, 35, respectively. As a result, the outer blade case 20 is attached to the support frame 30.

Pressers 36, 36 are attached to the mounting holes 35, 35 of the support frame 30, respectively. These pressing elements 36, 36 are closed from the outside of the mounting holes 35, 35, and are opposed to the locking claws 23, 23 hooked on the upper side of the mounting holes 35, 35, and the pressing projections 37, 3 are provided.
Have 7. When these pushers 36, 36 are pushed in, the pressing protrusions 37, 37 push the locking claws 23, 23 to elastically deform the elastic tongues 22, 22, and thereby the locking claw 2
3, 23 are disengaged from the upper sides of the mounting holes 35, 35 and the engagement is released. Therefore, the outer blade case 20 is attached to the support frame 3
It can be removed from scratch.

The pushers 36, 36 are coil springs 3.
It is pushed outward by 8, 38 and the hook 3
The mounting holes 35, 35 are kept in a closed state by the hooking of the support frame 30 by the support frame 30.

Further, in FIG. 1 to FIG. 3, etc., reference numerals 40 and 40 are a pair of inner blades, and as shown in FIG. 9, these inner blades 40, 40 have a large number of inner blades along the longitudinal direction of the blade base 41. 42 ... are arranged side by side. These inner blades 40, 4
0 is slidably in contact with the inner surfaces of the outer blades 1, 1 and the inner blade blades 42 slide on the inner surfaces of the outer blades 1, 1 so that the whiskers introducing holes 2, ... Cut the beard introduced.

As shown in FIG. 9, a plurality of round bosses 43 ... Are formed on the lower surface of the blade stand 41, and these round bosses 43 ... of the inner blade mounts 45, 45 shown in FIG. It is fitted in fitting holes 46 formed on the upper surface. Then, by caulking these round bosses 43 ...
0 and 40 are fixed to inner blade mounting bases 45 and 45, respectively.

Pivotal support holes 47 are formed in the central portions of the opposite side surfaces of the inner blade mounts 45, 45, and the mount supporters 48 shown in FIG.
The pivot shafts 49 formed on 48 are fitted. Therefore, the inner blades 40, 40 are movably supported by the mounting base supports 48, 48 in a seesaw motion.

The mounting base supports 48, 48 are mounted on an inner blade base 50 shown in FIG. A pair of guide pins 51, 51 are erected on the inner blade base 50, and mounting base supports 48, 48 are fitted in the guide pins 51, 51 slidably in the vertical direction. These guide pins 5
Coil springs 52 and 52 as spring members are attached to the reference numerals 1 and 51, and these coil springs 52 and 52 press the mounting base supports 48 and 48 upward.

Therefore, the inner blades 40, 40 are pressed against the outer blades 1, 1 by the biasing forces of the coil springs 52, 52. In this case, the inner blades 40, 40 are pushed toward the tops of the outer blades 1, 1 by independent coil springs 52, 52, respectively.

The inner blade base 50 is provided with fulcrum shafts 53, 53 at end portions along the longitudinal direction of the inner blades 40, 40 and arc-shaped slide surfaces 54, 54.
The arcuate slide surfaces 54, 54 have a predetermined radius circle around the swing center O when the outer blade holder 8 swings and swings when the inner blade base 50 is installed at a predetermined assembly position. Is formed on the circumference of.

The inner blade base 50 is swingably attached to an inner blade base receiver 55 shown in FIG. The inner blade rest 55 corresponding to the driving member is formed with concave grooves 56, 56 for receiving the fulcrum shafts 53, 53 at both ends, and a guide surface 57 formed of an arc surface with which the slide surfaces 54, 54 slide. 5
7 is formed.

The outer blade body 7, the outer blade holder 8, the rotation support base 13, the inner blade 40, the inner blade mounting base 45, the mounting base support 48, the inner blade base 50, the coil spring 52, and the inner blade. A shaving head H of swinging type is formed by including a pedestal support 55 and the like.

A holding boss 58 is formed on the lower surface of the inner blade base 50. The reciprocating driving body 60 is attached to the holding boss 58.
The shaft portion 61 formed in is fitted. Reciprocating driver 60
Is sandwiched between the support frame 30 and the relay coupling body 32, has a shaft portion 61 integrally in the central portion, and has fixed flange portions at both longitudinal ends via flexible thin portions 62, 62. 63, 63 are formed. These fixed flange portions 63, 63 are provided on the support frame 30 and the relay connection body 3.
It is sandwiched by 2 and fastened together by a fixing screw 31.

The shaft portion 61 of the reciprocating driving body 60 freely penetrates a through hole 64 having a large opening formed in the central portion of the support frame 30 and engages with a holding boss 58 formed on the lower surface of the inner blade base 50. There is. A packing 65 made of rubber or the like is fitted into the through hole 64 to prevent whiskers from entering the case body 75.

A sliding groove 66 is formed on the lower surface of the reciprocating driving body 60. The sliding groove 66 extends in the width direction thereof orthogonal to the longitudinal direction of the reciprocating driving body 60. This sliding groove 66
An eccentric shaft 67 is engaged with. The eccentric shaft 67 is eccentrically formed on the eccentric top 68.
Is attached to the motor shaft 71 of the motor 70. The motor 70 is operated by using the secondary battery 72 as a power source by operating the switch knob 76 provided on the surface of the front case 75 a of the main body case 75. The eccentric top 68 penetrates the insertion hole 69 formed in the relay connection body 32 and engages with the sliding groove 66.

The motor 70 is sandwiched between a motor support 81 projecting from the back surface (inner surface) of the front case 75a and the upper wall of the front case 75a (see FIGS. 15 and 16).
Synthetic resin bases 82 and 83 (see FIGS. 1 and 2 and FIGS. 21 and 22) are fitted to the upper and lower portions of the motor 70, and the upper case 82 has a front case 75a. There is provided a pair of screw receivers 82a into which the fixing screws 33 that are inserted through the upper surface walls are screwed.

Reference numeral 77 in FIG. 15 denotes a switch plate which is moved together with the switch knob 76 on the back surface of the front case 75a, to which a movable contact plate 78 is attached and which has a moderation convex portion 79a. It has the formed flexible deformation part 79. The moderation convex portion 79a rides over the peripheral surface of the round shaft-shaped locking convex portion 80 provided on the back surface of the front case 75a to give moderation to the sliding operation of the switch knob 76. In addition, 73 in FIG. 15 and FIGS.
Is a lock button for the switch knob 76, which keeps the switch knob 76 in a locked state at all times, and the lock state is released by being pushed by the pad of the finger attached to the switch knob 76, and the switch knob 76 slides. Is possible.

When the motor 70 is operated by turning on the switch knob 76, the rotation of the motor shaft 71 is changed to the eccentric top 6.
The eccentric shaft 67 of No. 8 is eccentrically rotated (turned). The rotation of the eccentric shaft 67 is transmitted to the reciprocating driving body 60, but
Since 7 is engaged with the sliding groove 66, the eccentric rotational movement of the eccentric shaft 67 is absorbed by the sliding groove 66 in the longitudinal direction of the main body case 75, so that the reciprocating drive member 60 is elongated. Reciprocating motion in the direction (width direction of the main body case 75) is generated.

Since the reciprocating drive member 60 has flexible thin-walled portions 62, 62 at both ends in the longitudinal direction, when the reciprocating driving force is applied, the flexible thin-walled portions 62, 62 are flexibly deformed, and the central portion. Only reciprocates in the longitudinal direction (left-right direction). Therefore, the shaft portion 61 formed in the central portion reciprocates in the longitudinal direction. By this reciprocating motion, the inner blade rest 55 is reciprocally driven, and thus the inner blades 40, 40 are reciprocally driven in the longitudinal direction via the inner blade mount 50 and the mounting base supports 48, 48.

Therefore, the whiskers introduced from the whisker introducing holes 2 of the outer blades 1, 1 are the inner blades 42 of the inner blades 40, 40.
, And the whisker introduction hole 2 are cut by the shearing action.

More specifically, in the use of the reciprocating electric shaver having the above structure, the outer blades 1, 1 and the outer blade holder 8 are swingable with respect to the outer blade case 20, so that the pair of outer blades 1, The tops of each one come into contact with the skin at the same time. That is, since the outer blade holder 8 is rotatably supported by the outer blade case 20 about the support shafts 14 and 14 as the center O, if any one of the pair of outer blades 1 and 1 tries to hit the skin, it is biased. The load acts and the outer blade holder 8 automatically tilts back and forth (oscillating swing), and the pair of outer blades 1 and 1 simultaneously contact the skin.
Therefore, the pair of front and rear outer blades 1, 1 makes it possible to shave with the pair of front and rear blades because the top of each mountain hits the skin S (see FIG. 1), resulting in two shavings, and shaving efficiency. Get higher

In this case, the inner blades 40, 40 slidably contacting the outer blades 1, 1 have inner blades 50 and mounting base supports 48, 4 respectively.
8 are pressed against the outer blades 1 and 1 by coil springs 52 and 52 provided between the inner blade base 50, the coil springs 52 and 52 and the mounting base 48, respectively. Since 48 also swings with the inner blades 40, 40, the inner blades 40, 40 are always the outer blades 1, 1, respectively.
Pushed towards the top of the.

That is, the outer blades 1, 1 come into contact with the skin S to be shaving at the surface connecting the ridges thereof, and hit the skin S at a right angle, while the coil springs 52, 52 are provided with the inner blades 40, 4.
Since it swings integrally with 0, the inner blades 40, 40 are always in the direction of the tops of the outer blades 1, 1 as shown by arrows D, D in FIG.
That is, the skin S is pressed in a direction perpendicular to the skin S.

Therefore, the maximum contact pressure acts on the tops of the outer blades 1, 1 and the inner blades 40, 40 do not separate (escape) from the outer blades 1, 1 even if a reaction force from the skin S is received. , Inner blade 4
No gap is formed between the inner blades 42 of 0, 40 and the inner surfaces of the outer blades 1, 1. Therefore, good sharpness can be maintained and the cutting performance is improved.

Further, when the outer blade holder 8 swings and swings, the outer blade holder 8 is returned to the neutral position by the neutral biasing spring 15 attached to the rotary support 13, so that the outer blades 1, 1
Always goes in the axial direction of the main body case 75,
The operability of this electric razor is improved.

As shown in FIG. 4 and the like, a head limiting knob 91, which is located above the switch knob 76, is vertically slidably mounted on the surface of the front case 75a of the main body case 75. The knob 91 is an integrally molded product of synthetic resin, and as shown in FIGS.
A second plate-shaped portion 93 that extends along the back surface of one side wall in the width direction of the main body case 75 is provided at one end of the first plate-shaped portion 92 that extends along the back surface of the front wall 5a to form a substantially L shape. .

As shown in FIG. 17, the first plate-shaped portion 92 is formed with a pair of slide holes 94 extending in the up-and-down direction and in parallel with each other in the form of slits, and located between them. A knob convex portion 95 is formed. Further, the first plate-shaped portion 92 is provided with an elongated flexible deformable portion 96 which is located on the second plate-shaped portion 93 side and extends in the up-down direction, and a moderation protrusion 97 is formed in the longitudinal intermediate portion. ing.

The pair of slide holes 94 are formed in the front case 75a.
Are fitted to the roots of a pair of guide projections 98 integrally formed on the back surface of the guide projections 98, respectively. Both guide protrusions 98 have a stepped structure, and a synthetic resin pressing plate 99 that overlaps the back surface of the first plate-shaped portion 92 is fitted to the tip portion protruding from the guide hole 94 and is caulked. . The holding plate 99 maintains the attached state of the head limiting knob 91, and the knob projection 95 projects forward of the main body case 1 through the opening 100 provided in the front case 75a.

On the back surface of the front case 75a, the positioning projections 101, 102 having a stepped structure having a semicircular root portion are formed.
However, the guide projection 98 and the opening 100 are integrally projected between them, and holes 99a provided at both ends in the longitudinal direction of the pressing plate 99 are inserted into the tips of these, thereby positioning the pressing plate 99. . Then, the second plate-shaped portion 9
The root portion of the positioning protrusion 102 on the second side is used as a locking portion with which the moderation convex portion 97 is engaged.

Therefore, the head limiting knob 91 is provided so as to be movable between a raised position, that is, a limiting position and a lowered position, that is, a non-limiting position. Then, the moderation convex portion 97 rides over the locking portion of the positioning protrusion 102 and gives a moderation feeling each time the head limiting knob 91 is moved from the limiting position to the limiting position or vice versa. The head limiting knob 91 can be held at any of the above positions by the engagement with the locking portion.

An opening 75d shown in FIGS. 21 to 23 is formed at one end of the upper end wall of the main body case 75 and at one end in the width direction of the main body case 75. The opening 75d has a second opening.
The upper ends of the plate-shaped portions 93 face each other. This second plate-shaped portion 9
As shown in FIG. 16 and the like, a stopper receiver 105 in the form of a groove is formed on the upper end portion of 3. And opening 7
5d is closed by one end 32a (see FIG. 3) in the longitudinal direction of the relay coupling body 32, and a guide hole 106 facing the stopper receiver 105 is provided in this one end 32a.

A stopper 107 is provided through the guide hole 106 so as to be slidable in the axial direction. The stopper 107 has a round bar shape having a flange portion 107 a having a diameter larger than that of the guide hole 106 at an intermediate portion in the longitudinal direction.
The guide hole 106 is prevented from coming off by 7a. The lower end of the stopper 107 is a stopper receiver 105.
Are supported by being engaged with.

The upper portion of the stopper 107 is the support frame 30.
Through hole 108 provided at one end of the
Has been inserted into. The upper portion of the guide through hole 108 is narrow, and a coil spring 109 for winding the outer periphery of the upper portion of the stopper 107 is provided between this portion and the collar portion 107a. The stopper 107 is urged downward (toward the second plate-shaped portion 93) by the spring 109 so as to always keep the engagement with the stopper receiver 105. Therefore, as shown in FIG. 21, the upper end of the stopper 107 is normally held without protruding from the outer surface of the support frame 30, particularly the upper surface.

As the stopper 107 moves up and down, the stopper 107 can come into contact with and separate from an engaging surface 8b as a swing limit engaging portion provided on one end wall 8a of the outer blade holder 8. It is provided directly below the engaging surface 8b so as to face it.
The movement stroke given to the stopper 107 interlocking with the head limiting knob 91 is such that when the head limiting knob 91 is moved from the non-restricted position to the limited position above it, the upper end of the stopper 107 is engaged as shown in FIG. Meeting 8
It is set so as to come into close or slight contact with b.
In the state shown in FIG. 22, the shaving head H is prevented from rotating counterclockwise in FIG. 22 about the swing center O, but is allowed to rotate clockwise.

Therefore, as shown in FIG. 21, when the head limiting knob 91 is held in the non-limiting position,
Since the stopper 107 is held at a position that does not affect the free swinging swing of the shaving head H,
The stopper 107 and the engaging surface 8b of the shaving head H do not come into contact with each other, and during the shaving operation, the shaving head H is free and large in the clockwise and counterclockwise directions about the swing center O as described above. Can swing and rock.

When shaving is performed aiming under the nose or just below the lower lip, the head limiting knob 91 may be pushed up from the non-limiting position to the limiting position. Then, as shown in FIGS. 22 and 23, the stopper 107 corresponds to the amount of movement of the knob 91 and the coil spring 1
09 is pushed up against the spring force, its upper end is projected above the support frame 30, and the stopper 1
The upper end of 07 is immediately adjacent to or slightly touches the engaging surface 8b of the outer blade holder 8 of the shaving head H. This state is shown in FIG. 22, and is held by clicking the moderation protrusion 97 and the positioning protrusion 102.

In the state shown in FIG. 22, the stopper 10
By engaging the upper end of 7 with the engaging surface 8b, the stopper 1
Rotation of the shaving head H counterclockwise in FIG. 22 about the swing center O that pushes in 07 is restricted. However, clockwise rotation is allowed. The state of being rotated clockwise is shown in FIG.

Due to such a rotation limiting action of the shaving head H, the shaving is performed in a range of a small swing swing angle θ (see FIG. 23) as compared with the case of the free swing swing shown in FIG. The head H swings and swings. The swinging swing angle θ is, for example, 10 °, which is half of the swinging swing angle when the swinging swing is freely performed without the above-described swing limitation.

Therefore, even when shaving under the nose or the like, the shaving head H can be swung slightly and swinged as described above, so that the orientation of the main body case 75 is adjusted according to the target shaving. The vertex (maximum cutting efficiency portion) of the outer blade 1 can be applied to the skin at a right angle without the need to bother to aim the blade at an optimum angle. Since the swinging swing angle θ is small, it is easy to press the shaving head H against the target shaving portion such as under the nose. Thereby, the beard of the part to be shaved can be efficiently cut.

In addition, the shaving head H as described above
In order to cancel the rotation limiting action of, the head limiting knob 91 may be pulled down from the limiting position to the non-limiting position therebelow. Then, according to the displacement of the knob 91, the spring force of the coil spring 109 pushes the stopper 107 back so that the upper end of the stopper 107 enters the support frame 30 and returns to the state shown in FIG. A large swinging motion is possible.

21 to 23 and the like, reference numeral 11
Reference numeral 0 is a trimmer unit attached to the main body case 75 so as to be movable in the longitudinal direction thereof. When the trimmer unit is used, the eccentric top 68 of the motor 70 shown in FIG. The driving force is transmitted through the engaging protrusion 111b of the interlocking link 111 that is swingably provided on the base 82. Reference numeral 112 denotes a convex portion receiver of the trimmer unit 110, which is engaged with and disengaged from the engaging convex portion 111b as the trimmer unit 110 moves up and down.

The present invention is not limited to the above embodiment. For example, in the configuration of the above-described embodiment, the stopper 107 is provided so as to extend between the engagement surface (pivoting restriction engagement portion) 8b of the shaving head H and the head restriction knob 91.
Is pressed against the engaging portion 8b when the head limiting knob 91 is arranged in the limiting position, and the shaving head H is slightly rotated in advance in accordance with this, as compared with the case of free swinging. The small swinging swing angle θ can be set to be smaller.

Although the stopper 107 is a separate component from the shaving head H and the head limiting knob 91 in the above-described embodiment, the stopper 107 may be provided integrally with the shaving head H or the head limiting knob 91 instead. Good. When the stopper 107 is provided integrally with the shaving head H, the swinging limit engaging portion may be provided on the head limiting knob 91.

[0065]

As described above, according to the present invention, in the electric shaver in which the shaving head is swingably swingable in the thickness direction of the main body case, the head limiting knob is moved to the limiting position. The swinging swing angle of the shaving head can be restricted to be smaller than the usual free swinging swing angle. Therefore, when aiming and shaving under the nose, etc., the shaving head is swung within the limited swinging swing angle so that the shaving head is aimed and shave regardless of the direction of the main body case. Can be applied at a substantially right angle, and therefore, the operability and the whisker cutting performance for the purpose of shaving can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a shaving head portion of an electric shaver according to an embodiment of the present invention, taken along line I-I of FIG.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1 in the embodiment.

FIG. 3 is an exploded perspective view showing the vicinity of a shaving head in the same embodiment.

FIG. 4 is a front view of the entire electric shaver according to the embodiment.

FIG. 5 is an exploded cross-sectional view of the outer blade assembling structure according to the embodiment.

FIG. 6 is an exploded perspective view of the outer blade and its periphery in the embodiment.

FIG. 7 is a view taken along line VII-VII in FIG. 5 in the same embodiment.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 5 in the same example.

FIG. 9 (A) is a front view showing the structure of the inner blade in the embodiment in a partially sectioned manner. (B) Figure is BB in FIG. 9 (A)
Sectional drawing which follows the line.

FIG. 10 is a perspective view showing an inner blade mounting base in the embodiment.

FIG. 11 (A) is a perspective view showing the mounting base support in the same embodiment as seen from the front side direction. FIG. 3B is a perspective view showing the mounting base support from the back side direction.

FIG. 12A is a perspective view showing the inner cutter base in the same embodiment as seen from the front side direction. FIG. 3B is a perspective view showing the inner blade stand as viewed from the back side direction.

FIG. 13 (A) is a perspective view showing the inner blade holder in the same embodiment as seen from the front side direction. FIG. 3B is a perspective view showing the inner blade holder as viewed from the back side direction.

FIG. 14 is a cross-sectional view showing an assembled state of the inner blade rest and the inner blade rest in the embodiment.

FIG. 15 is a rear view of the front case showing the structure around the mounting portion of the head limiting knob in the embodiment.

FIG. 16 is an exploded perspective view showing a structure around a mounting portion of a head limiting knob in the embodiment.

FIG. 17 is a perspective view showing the structure of a head limiting knob in the embodiment with a part thereof omitted.

FIG. 18 is a plan view showing the electric shaver according to the embodiment with a part thereof cut away.

FIG. 19 is a perspective view showing a configuration of an outer blade holder in the embodiment.

FIG. 20 is a bottom view showing the configuration of the outer blade holder according to the embodiment.

FIG. 21 is a cross-sectional view showing the configuration of a head limiting mechanism in the example.

FIG. 22 is a cross-sectional view showing the configuration of a head limiting mechanism in the same example in a head limited state.

FIG. 23 is a cross-sectional view showing the configuration of a head limiting mechanism in the example in a head limited state in which a shaving head swings and swings.

[Explanation of symbols]

Reference numeral 8b ... Engaging surface (pivoting limit engaging portion), 34 ... Support protrusion, 75 ... Main body case, H ... Shaving head, 91 ... Head limiting knob,
105 ... stopper receiver, 107 ... stopper,
109 ... Coil spring, θ ... Limited swinging angle.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yo Torizawa 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tokyo Electric Co., Ltd. Hadano Factory

Claims (1)

[Claims] 1. A body case having a pair of support protrusions, a shaving head located between the pair of support protrusions and swingably swingable in a thickness direction of the body case, the body. A head limit knob that is operably attached to the case from the outside and is movable between a limited position and an unrestricted position, and a swing provided on one of the head limit knob and the shaving head. The limiting engagement portion is provided movably between the shaving head and the head limiting knob, or is provided on the other of the head limiting knob and the shaving head, and the head limiting knob is provided. A stopper that can be brought into contact with and separated from the swinging limit engaging portion when it is arranged at the limiting position, and that limits the swinging angle of the shaving head to a small value. An electric razor characterized by having.