JPH0427508Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric shaver equipped with a rotary inner cutter, and more specifically relates to an improvement of an inner cutter holder that supports the inner cutter.

[Conventional technology]

Conventionally, as an inner cutter holder for this type of electric shaver, for example, as shown in Japanese Utility Model Application Publication No. 57-10373, the surface of the inner cutter holder from which the cutting edge of the inner cutter protrudes has a convex center. formed into a curved surface,
There are those with a flat back surface, and
For example, as shown in Japanese Utility Model Application Publication No. 57-10373, there is a type having a dish-shaped cross section with a convex edge around the entire circumference of the back surface.

However, since the former inner cutter holder is formed into a solid body with a thickness sufficient to support the inner cutter almost vertically, it not only becomes heavy and tends to overload the drive motor, but also causes vibrations and It was causing noise. On the other hand, the latter type is hollow and lightweight with a recess on the back surface, which can reduce vibration and noise generation, but when brushing away the hair adhering to the back surface of the inner blade holder with a cleaning brush, etc. The biggest problem was that the convex edges got in the way and made it difficult to clean the hair.

[Problem that the invention attempts to solve]

The purpose of this invention is to solve the above-mentioned conventional drawbacks and provide an electric shaver in which the inner cutter holder rotates quietly and lightly, and the back surface of the inner cutter holder can be easily cleaned of lint.

[Means for solving problems]

In this invention, a disc-shaped inner cutter holder 18 that supports a plurality of rotary inner cutters 3 has a plurality of inner cutter support holes 80 passing through it in the front and back directions,
An electric shaver is assumed in which the base portion 3b of the inner cutter 3 is inserted into each inner cutter support hole 80.

In addition, in this invention, in order to ensure reliable support of the inner cutter 3 and to prevent vibration and noise generation of the inner cutter holder 18, the back surface of the inner cutter holder 18 is
An inner cutter supporting convex portion 84 is protrudingly provided on the peripheral edge of the inner cutter supporting hole 80 in correspondence with the radially outer end position of the inner cutter supporting hole 80, and an inner cutter is provided on the radially inner side of each inner cutter supporting convex portion 84. A support groove 85 is provided to communicate with the inner cutter support hole 80, and the radially outer end edge of the base 3b of the inner cutter 3 is fitted into the inner cutter support groove 85.

In addition, this invention provides hair between the adjacent inner blade supporting protrusions 84, 84 on the back surface 18b of the inner blade holder 18 in order to facilitate cleaning of hair debris on the back surface of the inner blade holder 18. A debris cleaning recess 86 was formed.

[Effect of idea]

According to this invention, an inner cutter supporting convex portion 84 is provided protrudingly on the peripheral edge of the back surface of the inner cutter holder 18, and an inner cutter supporting groove 85 is formed on the radially inner surface side of the inner cutter supporting convex portion 84. This inner cutter holder is provided in communication with the blade support hole 80, and one end of the base 3b of the inner cutter 3 in the inner cutter support hole 80 on the radially outer end side is fitted into the inner cutter support groove 85. Even if the parts other than the inner cutter supporting convex part 84 of 18 are made thinner and lighter, the inner cutter 3 can be reliably supported in a substantially vertical manner, and vibration and noise generation can be reduced as much as possible. Ivy. Further, since a recess 86 for sweeping out hair is provided between the adjacent inner blade supporting convex portions 84 and 84 on the back surface 18b of the inner blade holder 18, hair that is attached to the back surface of the inner blade holder 18 is removed. Hair can be easily swept radially outward from the hair sweeping recess 86 using a cleaning brush or the like, which is extremely advantageous in terms of cleaning and hygiene management.

〔Example〕

An embodiment of the electric shaver according to this invention will be described based on the drawings.

This example shows a battery-powered electric shaver that can be washed with water, and its outline is as follows:
An outer cutter 2 and a rotary inner cutter 3 as shown in FIG. 1 and a comb blade unit 65 as shown in FIG. A motor 4 is driven using a battery 6 housed in the comb blade unit 65 as a power source, and the motor 4 rotates the inner cutter 3 or moves the movable comb blade 67 of the comb blade unit 65 in a linear reciprocating motion.

In FIG. 1, the main body case 1 which also serves as a grip is a plastic molded product formed into a conical shape that spreads downward, and the inside thereof has an upper opening into which a motor 4 is dropped and stored from above. The motor storage cylinder part 7 of the mold is integrally formed,
An open-bottom battery case storage chamber 9 is formed below the motor storage cylindrical portion 7 in the main body case 1, into which a battery case 8 is fitted concentrically from its open bottom. As shown in FIG. 7, the cross-sectional shape of the motor housing cylinder 7 is formed to match the outer shape of the motor 4, which has parallel flat surfaces 4a, 4a.

In FIG. 2, the battery case 8 is a plastic molded product formed into an open-bottom cylindrical shape that can store a AA battery 6 vertically. As shown in FIG. 8, this battery case 8 has flanges 29, 29 integrally projecting outward from the lower peripheral surface. Further, as shown in FIGS. 2 and 4, one side (see FIG. 4) of the lower peripheral surface of the battery case 8 where the flange 29 extends and the other side (see FIG. 2) ) is provided with a cut groove 30 having a U-shape when viewed from the front, and an elastic wall piece 31 that can be elastically deformed in the radial direction using the upper end 31a connected to the battery case 8 as a fulcrum.
form. One elastic wall piece 31 is provided on one side (see FIG. 4) of the lower peripheral surface of the battery case 8, and two elastic wall pieces 31 are provided on the other side (see FIG. 2). As shown in FIG. 8, a flange 2 is provided at the lower end of each elastic wall piece 31.
An engaging pawl 32 protruding slightly further radially outward than the outer peripheral edge of the flange 9 is integrally formed between the flanges 29 and 29 so as to be flush with the flanges 29.

1 and 2, an anode terminal plate 19 and a cathode terminal plate 20 connecting the battery 6 and the motor 4 are attached to the battery case 8 in advance. Anode terminal plate 1
As shown in FIG. 5, 9 is made of an elastic conductive metal plate that is pressed into a generally U-shape in plan view, and its longitudinal intermediate portion 19a is connected to the upper wall 8a of the battery case 8. It is caulked and welded to the upper surface side of the body using a welding pin 21. As shown in FIG. 1, the contact point 19b at one longitudinal end of the anode terminal plate 19 is
The contact 19c at the other end is introduced into the inner surface through the notch 22 of the battery case 8 and contacts the anode terminal 23 at the upper end of the battery 6 in the battery case 8, and the contact 19c at the other end is connected to the upper wall 8a as shown in FIG.
The upper part can be elastically deformed in the vertical direction. On the other hand, the cathode terminal plate 20 is attached to the outer surface of the peripheral wall of the battery case 8 in the vertical direction. As shown in FIGS. 1 and 2, the contact 20a at the upper end of this cathode terminal plate 20 is provided to protrude upward from the upper wall 8a of the battery case 8, and the lower end of the cathode terminal plate 20 is provided with a battery cover 36. A conical coil spring 28 which comes into contact with the cathode terminal 27 on the lower end side of the battery 6 under the pressing action of is rotatably connected to one end of the conical coil spring 28 .

Thus, the battery case 8 is fitted into the battery case storage chamber 9 of the main case 1 from the open bottom, but at this time, there is a gap between the inner circumference of the main case 1 and the mounting position of the motor 4 as shown in FIG. A space S that gradually becomes wider as it goes downward from almost the lower end of
By forming the main body case 1 and the battery case 8, it is possible to attenuate or prevent the resonance of the main body case 1 and the battery case 8 due to the vibrations of the motor 4 and the inner cutter 3 as much as possible.

Further, the battery case 8 has the space S between it and the inner circumferential surface of the main body case 1 by bringing the outer peripheral edge of the flange 29 into contact with the lower end of the inner circumferential surface of the main body case 1.
securely hold.

When the battery case 8 is fitted, the elastic wall piece 31 is elastically deformed inward in the radial direction, the engaging claw 32 is inserted into the inner peripheral surface side of the opening lower edge 34 of the main case 1, and the case 1 is slid upward. It engages with an engagement hole 35 provided on the lower circumferential surface (see FIGS. 1 and 8). This engagement prevents the battery case 8 from coming off downward from the main case 1 and from shaking within the main case 1.

As shown in FIG. 1, the engaging claw 32 of the battery case 8
A taper 32a is provided at the tip. According to this, when the battery case 8 is fitted into the main body case 1, the taper 32a hits the opening lower edge 34 of the main body case 1, and at this time, by pushing the battery case 8 upward a little forcefully, the elastic wall piece 31 is moved in the radial direction. The taper 32a forms the opening lower edge 3 through inward elastic deformation.
4 slides into the inner surface, so it can be fitted smoothly.

Further, as shown in FIG. 1, a reinforcing rib 33 is provided at the corner where the elastic wall piece 31 and the engaging claw 32 intersect, which also serves as a guide when the battery case 8 is fitted into the main body case 1.

As shown in FIG. 8, the flange 2 of the battery case 8
Recesses 38 are provided at several locations around the periphery of the case 9, and ribs 39 that fit into the recesses 38 are provided on the inner circumferential surface of the lower end of the opening of the main body case 1.
9 constitutes positioning means for the battery case 8 so that the battery case 8 is stored in a fixed orientation with respect to the main body case 1.

Thus, when the battery case 8 is stored in the main body case 1 in a predetermined orientation via the positioning means, the contact 19c of the anode terminal plate 19 is aligned with the opening 24 (the seventh The cathode case 4a of the motor 4 is elastically in contact with the anode terminal 25 of the motor 4 facing the motor 4 (see figure), and the contact 20a at the upper end of the cathode terminal plate 20 faces an opening 26 in a part of the peripheral wall of the motor housing cylinder 7. makes elastic contact with the

In FIG. 1, the engagement hole 3 of the main body case 1
A screw 37 is carved on the outer periphery of the lower end having 5,
The battery cover 36 is screwed into this. As shown in FIG. 2, the lower end 8b of the battery case 8 is connected to the main body case 1.
The length is set so that when the opening is fitted into the opening, the opening protrudes downward from the lower edge 34 of the opening. If the lower end 8b of the battery case 8 protrudes from the lower opening edge 34 of the main case 1 in this way, it becomes easier to insert the battery 6 into the battery case 8, and the battery cover 36 can be removed and the main case 1 can be placed on a tabletop or the like. Battery case 8 when standing upright
The bottom edge of the main body case 1 is sitting on the table top, and the bottom edge of the opening 3
4 can be floated above the tabletop, and therefore, the screw 37 carved on the outer periphery of the lower edge 34 is protected from rubbing against the tabletop.

In the figure, the battery cover 36 is formed into a round dish shape that expands upward, and is formed at the lower end 8b of the battery case 8.
Attach a waterproof rubber or plastic O-ring 48 to the screw 37 at the bottom of the main case 1 so as to cover it.
Screwed through. The upper end circumferential surface of the battery cover 36 and the lower end circumferential surface of the main body case 1 form a convex curved surface in the form of a middle bulge, so that the bulged portion does not give a feeling of pressure to the palm when gripped.

1 and 4, a switch opening/closing member 50 is provided between the anode terminal 23 of the battery 6 and the anode terminal 25 of the motor 4 to connect and disconnect both terminals 23 and 25. This switch opening/closing member 50 consists of a plunger holding base 53 and a pin plunger 52 which is slidably superimposed on the plunger holding base 53 by a predetermined stroke. The pin plunger 52 is formed by integrally molding a pin 54, a boss 55, and a pair of elastically deformable moderation arms 56. On the other hand, the plunger holding base 53 has a pin hole 57 into which the pin 54 of the pin plunger 52 is inserted, moderation protrusions 58, 58 that engage and disengage with the claw 56a at the tip of the moderation arm 56, and an elastically deformable engagement claw 59. It becomes.

These pin plungers 5 assembled in advance
2 and the plunger holding base 53, as shown in FIGS. 1 and 6, are switch opening/closing members formed between the inner circumferential surface of the upper part of the peripheral wall of the main body case 1 and the outer circumferential surface of the upper end of the motor housing cylindrical portion 7. It is dropped into the storage chamber 60 from above and installed. At this time,
As shown in FIG.
is a pressed point that is inserted into an opening 61 made in the bottom 60a of the storage chamber 60, projects into the battery case storage chamber 9, and is slightly closer to the fixed end side than the contact 19c on the anode terminal plate 19 on the battery case 8. The position is set so as to press 19d.

Further, as shown in FIGS. 1 and 7, the plunger holding base 53 has an engaging claw 59 integrally formed on its upper end that engages with an engaging hole 62 provided in the upper part of the inner wall of the storage chamber 60. , so as not to shake inside the storage chamber 60.

After the pin plunger 52 and the plunger holding base 53 are assembled, the switch knob 51 inserts the pin 51a integrally protruding from the knob 51 into the boss 55 of the pin plunger 52 through the hole 63 opened at the upper part of the outer peripheral surface of the main body case 1. By doing so, it is integrally combined with the pin plunger 52.
Therefore, under normal conditions, the switch knob 51 is in the lower OFF position, and the pin plunger 52 is in the lowered position, as shown in FIGS. 1 and 4.
The contact point 19c of the anode terminal plate 19 is separated from the anode terminal 25 of the motor 4 in order to press the tip of the anode terminal plate 19 into pressure contact with the pressing point 19d of the anode terminal plate 19. When the switch knob 51 is slid upward, the pressure exerted by the pin plunger 52 is released, so that the contact 19c of the anode terminal plate 19 is brought into contact with the anode terminal 25, thereby achieving an on state.

As shown in FIG. 1, the switch opening/closing member storage chamber 60 is provided on the opposite side from the drainage opening 41. Also, the switch opening/closing member storage chamber 60
An O-ring 64 made of rubber or plastic is interposed between the pin 54 of the pin plunger 52 and the pin hole 61 at the bottom of the pin plunger 52, so that water can flow through the hole 6 during washing.
Even if the battery case 3 enters the storage chamber 60 from the battery case storage chamber 9, it is prevented from entering the battery case storage chamber 9.

1 and 7, a drain port 40 is recessed in a part of the inner bottom of the hair receiving tray 10, and this drain port 40 is connected to an opening 41 provided in a part of the circumferential surface of the upper end of the main body case 1. Let me come. On the other hand, a ring-shaped shutter 42 is fitted on the outer circumferential surface of the upper end having the opening 41 of the main body case 1 so as to be rotatable in the circumferential direction, and a drain port 4 is provided at a part of the circumference of the shutter 42.
3 is rotatable between a drain opening position where the drain opening 40 of the hair receiving tray 10 matches and communicates with the drain opening 40 and a drain opening closing position where the drain opening 40 is closed. As shown in FIG. 7, a moderation arm 44 that can be elastically deformed in the radial direction is connected in a cantilevered manner from a part of the inner circumference of the shutter 42, and is provided at the tip of this arm 44, as shown in FIG. The engaging claws 45 are capable of engaging and disengaging from engaging protrusions 46 and 47 provided on the outer peripheral surface of the upper end of the motor housing cylindrical portion 7 of the main body case 1 .

A finger hook 42a is provided on a part of the outer peripheral surface of the shutter 42.
As shown in FIG. 3, this finger hook 42a is set to be located directly above the switch knob 51 when the drain port is in the closed position. Therefore, when opening and closing the shutter 42, the shutter 42 can be easily opened and closed by simply moving the finger, usually the thumb, on the switch knob 51 upward without changing the main body case 1.

In FIG. 1, after the motor 4 and the switch opening/closing member 50 have been assembled, a hair catcher 10 is placed on the upper end of the opening of the main body case 1 and the motor storage cylinder 7, and the hair catcher 10 is integrally connected with a screw 11. Press 10 to hold down motor 4. Motor housing cylinder part 7
A waterproof O-ring 48a is interposed between the upper end of the hair receiving tray 10 and the overlapping surface of the hair receiving tray 10. The hair receiving tray 10 has an opening 13 in the center of the bottom from which the shaft 12 of the motor 4 projects, and a screw 15 into which the dome-shaped outer cutter holder 14 of the outer cutter 2 is screwed is provided on the outer periphery.
Further, a rubber or plastic packing 49 is installed between the central opening 13 of the hair receiving tray 10 and the motor shaft 12 to close the gap therebetween and prevent hair from entering.

A rotor 17 is press-fitted and fixed to the shaft 12 of the motor 4 in the hair receiving tray 10, and an inner cutter holder 18 of the rotary inner cutter 3 is fitted onto the outer periphery of the rotor 17 so as to be removable and to prevent rotation. be done.

In FIG. 1, the inner cutter holder 18 is a disc-shaped plastic molded product, and has a plurality of radially elongated inner cutter support holes 80 extending from the front to the back. Insert the base 3b having a width narrower than the radial length of the cutting edge 3a, engage one end of the leaf spring 82 in the hole 81 of the base 3b, and insert the other end of the spring 82 onto the back surface of the inner blade holder 18. By fixing to the blade, each inner cutter 3 has a cutting edge 3a.
The inner cutter holder 18 is pressed against the inner surface of the outer cutter 2.
is supported by

11 to 14, the surface 18a of the inner cutter holder 18 is formed into a curved surface with a convex center in accordance with the shape of the dome-shaped outer cutter 2. As shown in FIGS. From the center of the back surface 18b of the inner blade holder 18 to the rotor 1
7, and the inner cutter support convex portion 84 from the peripheral edge of the back surface 18b of the inner cutter support hole 80.
The respective protrusions are provided corresponding to the radially outer end positions of the An inner cutter support groove 85 is provided on the radially inner end surface side of the outer and inner cutter support convex portion 84 so as to communicate with the inner cutter support hole 80 .
The radially outer end edge of the base 3b of the inner cutter 3 is fitted to support the inner cutter 2 substantially vertically. In addition,
The radially inner end edge of the base 3b of the inner cutter 3 is fitted into a recess 83a provided on the circumferential surface of the boss 83.

Further, a hair-sweeping recess 86 is formed between the adjacent inner-cutter supporting convex parts 84, 84 on the back surface 18b of the inner-cutter holder 18, and hair debris adhering to the back surface 18b is removed from this recess 86. It is designed so that it can be swept radially outward with a cleaning brush or the like.

In FIG. 14, the end face 87 of the inner cutter supporting convex portion 84 that precedes the rotational direction A has a shape such that the radially outer end 87a of the end face 87 precedes the radially inner end 87b in the rotational direction A. Form on a slope. That is, it is preferable that the angle α formed between the end surface 87 and the radial line D is set to approximately 30 degrees. According to this, when the inner cutter holder 18 rotates, its back surface 18
An air flow in the direction of arrow B is generated by the end surface 87 of the inner blade supporting convex portion 84 on the back surface 18b.
Since the hair adhering to the inner blade holder 18 is not released outward in the radial direction but is actively drawn inward in the radial direction, it is possible for the hair to blow up from the outer periphery of the inner blade holder 18 toward the surface 18a. will be restrained in an effective manner.

In FIG. 14, the back surface 18 of the inner cutter holder 18
A plurality of spring bearing ribs 88 running in the radial direction are provided between the inner cutter support holes 80 and 80 on the top b.
By placing the leaf spring 88 on the lower surface of the leaf spring 8, deformation of the leaf spring 88 is prevented. A welding pin 88a is provided protrudingly from one of the ribs 88, and as shown in FIG. 15, a hole 19 on the fixed end side of the plate spring 82 is inserted into the welding pin 88a and welded by caulking.

Further, as shown in FIG. 15, a small protrusion 89 is provided on the radially inner surface side of the inner cutter support protrusion 84 in line with the inner cutter support groove 85, and the fixed end of the leaf spring 82 is attached to the protrusion 89. By fitting the recess 90 on the side, together with the fitting between the welding pin 88a and the hole 91, the plate spring 82 is positioned and prevented from shifting before caulking.

In FIG. 1, the rotor 17 has an eccentric pin 16 projecting from its upper end so that it can also be used as a drive shaft for a vibrating comb blade unit 65 as shown in FIG.

As shown in FIG. 17, this comb unit 65 includes movable and fixed comb blades 67 and 68 inside a cap-shaped comb blade case 70, and a plastic vibrator that engages with the movable comb blade 67. 66, and the respective cutting edges of the movable and fixed comb blades 67, 68 are made to protrude from an opening in a part of the peripheral surface of the comb blade case 70. When using this comb unit 65, remove the outer cutter holder 14 of the outer cutter 2 from the hair tray 10, and also remove the rotary inner cutter holder 18.
is extracted from the rotor 17, and then the vibrator 66 of the comb blade unit 65 is fitted to the eccentric pin 16, whereby the rotation of the eccentric pin 16 is converted into linear reciprocating motion by the vibrator 66, and the movable comb blade is 67 linearly reciprocates on the lower surface of the fixed comb blade 68.

A chamfered portion 71 is formed on the upper surface side of the comb blade case 70. As shown in FIG. 16, this chamfered portion 71 is formed into a semi-circular plane with the comb blades 67, 68 in the diametrical direction, and by applying this chamfered portion 71 to the skin, the cutting edges of the comb blades 67, 68 are exposed to the skin. It is easy to apply. Further, as shown in FIG. 17, the chamfered portion 71 is provided with a gentle radius R so that the chamfered portion 71 contacts the skin in a point-to-point manner without surface contact, thereby making it easier to slide on the skin.

The comb blade unit 65 is set so that the comb blades 67 and 68 are positioned directly above the switch knob 51 and the finger hook 42a of the shutter 42, as shown in FIG.

In Fig. 19, after washing the electric shaver with water, turn it upside down and place it in a draining case 7 that also serves as a stand.
2 to remove water adhering to the outer surface of the razor, and to drain water poured into the outer blade 2 from the numerous hair introduction holes made in the outer blade 2. There is. Note that the outer surface of the drainer case 72 is spirally formed with an uneven strip 73 that serves both to drain water adhering to the outer surface and to prevent the hand holding the drainer case 72 from slipping.
A drain hole 74 is opened in a.

[Brief explanation of the drawing]

The drawings show an embodiment of the electric shaver according to the present invention, in which Fig. 1 is an overall longitudinal side view, Fig. 2 is a longitudinal sectional front view of the main body case and battery case, and Fig. 3 is an overall external perspective view. , FIG. 4 is a front view of the switch and battery case, FIG. 5 is a plan view of the battery case, and FIG. 6 is a sectional view taken along the line A-A in FIG. 1.
Figure 7 is a sectional view taken along the line B-B in Figure 1, Figure 8 is a sectional view taken along the line CC in Figure 1, and Figure 9 is a sectional view taken along the line C-C in Figure 1.
10 is an exploded perspective view of the whole, FIG. 11 is a plan view of the inner blade holder,
Figure 2 is a front view of the inner blade holder, Figure 13 is a longitudinal sectional view of the inner blade holder, Figure 14 is a bottom view of the inner blade holder,
Fig. 15 is a bottom view of the inner cutter holder with the inner cutter attached, Fig. 16 is a plan view of the comb unit, Fig. 17 is a partial vertical sectional view of the comb unit with the comb unit assembled, and Fig. 18 is the comb. FIG. 19 is a front view of the assembled blade unit, and a half-cut sectional view showing the drained state. 1...Body case, 2...Outer blade, 3...Inner blade,
18...Inner blade holder, 80...Inner blade support hole, 84
... Inner cutter support convex portion, 85 ... Inner cutter support groove, 86
...Recessed part for sweeping out hair debris.

Claims (1)

[Claims for Utility Model Registration] A disc-shaped inner cutter holder 18 that supports a plurality of rotary inner cutters 3 has a plurality of inner cutter support holes 80 passing through it in the front and back directions. In an electric shaver in which the base 3b of the inner cutter 3 is inserted into the blade support hole 80, an inner cutter supporting convex portion 84 is provided at the peripheral edge of the back surface 18b of the inner cutter holder 18 at the radially outer end of the inner cutter support hole 80. The inner cutter support groove 85 is provided in a protruding manner corresponding to the position, and the inner cutter support groove 85 is fitted with the radially outer end edge of the base 3b on the radially inner side of each inner cutter supporting convex portion 84. A hair removal recess 86 is provided in communication with the hole 80 and is formed between adjacent inner cutter supporting protrusions 84 and 84 on the back surface 18b of the inner cutter holder 18. Razor.