JP2002325984A - Electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a razor head to smoothly follow the face profile of the skin in an electric razor in which the razor head is supported in a floatable way. SOLUTION: A razor head 2B comprises a motor 19 and a shaving block 91. The razor head 2B is supported in a floatable way by a pair of right and left springs 80 placed in a body case 1. A coming out stopping structure is placed between the razor head 2B and the body case 1. The coming out stopping structure comprises a head side engagement body 56 and a case side engagement body 66 and is so constituted as to permit the descent slide of the razor head 2B and further right and left tilting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric razor in which a razor head is floatingly supported on a main body case.

[0002]

2. Description of the Related Art An electric shaver of this type is known from Japanese Patent Application Laid-Open No. 2000-14943 filed by the present applicant.
There, a razor unit is constructed by assembling a razor head and a motor above and below a motor base, and the razor unit is supported in a floating manner by a pair of left and right springs provided between the motor base and the case body. This electric shaver can float freely up and down, but cannot float left and right or back and forth. Japanese Patent Application Laid-Open No. 8-182873 discloses an electric shaver that can float in the vertical and horizontal directions. There, a motor and a razor head are assembled to a motor case, and these three members are configured as one razor unit, and the razor unit is supported by the main body case so as to be able to float. Specifically, three support legs arranged in a triangular shape are vertically slidably supported by the main body case, and the motor case is pushed up and biased by a spring disposed between the support legs. The support leg and the motor case are connected via a spherical seat, and the three spherical seats can absorb the tilting of the razor head forward, backward, left and right, or obliquely.

[0003]

In the above-mentioned electric razor, the motor case is floated and supported by the supporting legs and the spring, and the tilting operation is absorbed by the spherical seat on the upper part of the supporting legs, so that the motor case is rather too stable. Supported in state. Therefore, when the beard cut surface moves along the skin surface, the response operation when the beard cut surface tilts following the change in the skin surface is slow, and the razor unit cannot always be tilted smoothly. The sliding friction of the support legs and the sliding friction of the spherical seat also reduce the response speed when the beard cut surface tilts.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to smoothly tilt a razor head following a change in the surface of the skin, so that the beard cut surface of the razor head can follow the skin in a state of being always in close contact with the skin. An object of the present invention is to provide an electric razor capable of cutting a beard.

[0005]

According to the present invention, the razor head 2B is floated and supported in an unstable state, so that the razor head 2B can smoothly tilt following a change in the surface of the skin. Specifically, the electric razor of the present invention includes a razor head 2B including a motor 19, an inner blade 20 driven by motor power, and the like, and a main body case 1 supporting the razor head 2B. The razor head 2B includes a pair of left and right springs 8 housed in the main body case 1.
It is pushed up by an elastic material including zero and is floatingly supported. A retaining structure is provided between the razor head 2B and the main body case 1 to retain and retain the razor head 2B against the urging force of the elastic material. The retaining structure includes a head-side engaging body 56 and a case-side engaging body 66 that allow the razor head 2B to slide downward and abut against each other while allowing the razor head 2B to tilt left and right.

More specifically, the electric razor includes a main body case 1 and an operating unit 2, and the operating unit 2 includes an electric component unit 2A and a razor head 2B provided on an upper part thereof. The electrical component unit 2A has an inner frame 16 fixed to the main body case 1, and the razor head 2B includes a motor base 22, a motor 19 and a motor holder 51 fixed below the motor base. Razor head 2 between inner frame 16 and motor base 22
A pair of left and right springs 80 for supporting B in a floating manner are provided. A head-side engaging body 56 is provided on both sides of the razor head 2B, and a case-side engaging body 66 that also serves as a slide guide for the head-side engaging body 56 is disposed in the main body case 1.

The elastic member comprises a pair of left and right compression coil springs 80 and a rubber elastic member 15 provided between the razor head 2B and the main body case 1.

A waterproof seal 15 provided between the razor head 2B and the main body case 1 also serves as a rubber elastic material. The waterproof seal 15 is disposed between the motor base 22 and the motor holder 51 and between the inner frame 16 and the main body case 1, and surrounds and seals the upper part of the electrical component unit 2A.

The inner peripheral edge 15a of the waterproof seal 15 formed of molded packing is vertically held and fixed between the motor base 22 and the motor holder 51. The outer peripheral edge 15 b of the waterproof seal 15 is sandwiched and fixed inside and outside by the seal wall 52 of the main body case 1 and the inner seal wall 52 provided on the inner frame 16.
A pair of left and right springs 80 are arranged in the area covered by the waterproof seal 15.

The head side engaging body 56 and the case side engaging body 6
6 is positioned on the left and right sides outside the spring center axis of the spring 80.

The head side engaging body 56 and the case side engaging body 66
And the razor head 2B
Can be tilted back and forth around the two engagement bodies 56 and 66 at an arbitrary floating position.

One of the head-side engaging body and the case-side engaging body is formed by the projection 56, and the other is formed by the vertically long groove 66.

A switching mechanism is provided between the main body case 1 and the razor head 2B for switching the vertical position of the razor head 2B to change the reaction force for pushing down the razor head 2B by the spring 80 into a plurality of stages. The switching mechanism includes a slide knob 11 provided on the outer surface of the main body case 1, a frame 62 vertically operated by the slide knob 11, and a razor head 2B.
The lower part of the motor base 22 constituting the
2 includes a pair of leg pieces 55 that inherits the descending operation of Step 2. Leg piece 5
The frame 5 and the frame 62 are connected via a groove 66 that allows the razor head 2B to move up and down and a projection 56 that engages with the groove 66. The protrusion 56 also serves as a head-side engaging body, and the groove 66 also serves as a case-side engaging body.

Head-side engaging body 56 and case-side engaging body 66
Is disposed between the double walls provided in the main body case 1.

The electric razor according to the present invention comprises a motor 1
9, a razor head 2B including an inner blade 20 and the like driven by motor power, and a main body case 1 supporting the razor head 2B. A head side engaging body 56 and a case side engaging body 66 are provided between the main body case 1 and the razor head 2B so as to abut against each other while allowing the razor head 2B to tilt forward and backward. Inner blade 20 and outer blade 2
1 including the razor head 2B
The head frame 23 supports the head frame 23 so that it can swing back and forth.

The forward / backward tilt angle θ1 of the shaving block 91
Is set to be larger than the front-back tilt angle θ2 of the razor head 2B with respect to the main body case 1.

The tension of the spring 92 for urging the shaving block 91 is set smaller than the tension of the spring 80 for urging the razor head 2B.

[0018]

According to the present invention, a pair of left and right springs 80 is provided.
Mainly, the razor head 2B is pushed up and urged to support the razor head 2B in a floating manner, and then the razor head 2B is pressed against the elastic material by a retaining structure provided between the razor head 2B and the main body case 1. Since the retaining razor is held against it, the floating support structure can be simplified and the assembling effort can be reduced compared to the conventional electric razor in which the razor unit is floatingly supported by three support legs, a spring and a spherical seat. The manufacturing cost of the electric shaver can be reduced accordingly. The razor head 2B is pushed up and urged by a pair of left and right springs 80 to float and support the razor head 2B in an unstable state, so that the razor head 2B can smoothly tilt following a change in the surface of the skin and can be ignored. Friction resistance can be reduced to the extent that the razor head can be cut effectively by making the cut surface of the razor head follow the skin in close contact. The head-side engaging body 56 and the case-side engaging body 66 abut and engage with each other, so that the razor head 2B can be retained and retained against the urging force of the spring 80. Also, allow the razor head 2B to slide down,
In addition, the head-side engaging body 56 and the case-side engaging body 66 are brought into contact with each other in a state in which the razor head 2B is allowed to tilt left and right. The surface can be made to follow with the skin always in close contact with the skin.

The operating unit 2 is constituted by the electric component unit 2A and a razor head 2B provided thereon.
When the razor head 2B is floatingly supported by a pair of left and right springs 80 disposed between the inner frame 16 of the electrical component unit 2A and the motor base 22 of the razor head 2B, the motor base 22 is supported only at two points. It can be supported in a stable state, and the response operation when the beard cut surface tilts can be promptly performed. When the head-side engaging members 56 provided on both sides of the razor head 2B are guided and supported by the case-side engaging members 66 also serving as slide guides, the razor head 2B is floatingly supported in a state where the left and right movement is restricted by the case-side engaging members 66. it can.

Although the tension characteristic of the spring 80 changes linearly, in the case of the rubber elastic member 15, the deformation stress increases rapidly as the amount of deflection increases, and the deformation stress changes in a quadratic curve. Therefore, when the razor head 2B is pushed up and urged by the pair of left and right compression coil springs 80 and the rubber elastic member 15, the more the razor head 2B sinks, the greater the push-down reaction force can be increased. Excessive deformation can be prevented, and the spring characteristics can be maintained in an appropriate state for a long time. In addition, razor head 2B
As the depression stroke of the razor head increases, the reaction force of the depression increases, so that the degree of adhesion of the razor head 2B to the skin can be increased.

According to the electric razor which also serves as a rubber elastic material with the waterproof seal 15 provided between the razor head 2B and the main body case 1, the structure can be simplified as compared with the case where a separate rubber elastic material is provided, and the waterproof seal can be provided. Since 15 covers a wide area in a state of surrounding and sealing the upper part of the electrical component unit 2A, rubber elasticity can be exerted evenly when tilting forward, backward, left and right, or in an oblique direction.

When the pair of left and right springs 80 are disposed in the area covered by the waterproof seal 15, the squeak noise of the springs 80 can be reliably prevented from leaking out of the case. The inner peripheral edge 15a of the waterproof seal 15 is vertically clamped and fixed by using the motor holder 51 fastened to the motor base 22, and the outer peripheral edge 15b of the waterproof seal 15 is sealed with the seal wall 54 and the inner seal wall 52.
, The operation unit 2 is simply loaded into the main body case 1 and fixed with screws.
b can be brought into close contact with the seal wall 54 on the side of the main body case 1 for sealing, and the assembly of the operation unit 2 to the main body case 1 can be facilitated.

The head side engaging body 56 and the case side engaging body 6
When the razor head 2B is tilted to the right or left, the left and right springs 80 can be elastically deformed when the contact portion with the spring 6 is located on the left and right sides of the spring center axis of the spring 80. At the same time, the posture of the razor head 2B can be returned immediately by the left and right springs 80, so that the response speed when the razor head 2B returns to the floating position can be improved.

Head side engaging body 56 and case side engaging body 66
Razor head 2
While allowing B to tilt left and right at any floating position,
Since it can be tilted back and forth around both engagement bodies 56 and 66,
The beard cutting surface can more reliably follow the change in the skin surface, and the beard cutting can be performed more effectively.

If one of the head-side engaging body and the case-side engaging body is formed by the projection 56 and the other is formed by the vertically long groove 66, the vertical sliding trajectory of the projection 56 can always be constant.
Therefore, it is possible to restrict the back and forth movement when the razor head 2B floats up and down.

A switching mechanism is provided between the main body case 1 and the razor head 2B for changing the reaction force of pressing down the razor head 2B into a plurality of stages. When the groove 66 provided in the frame 62 also serves as the case-side engaging body, the structure can be simplified and the manufacturing cost of the electric shaver can be reduced accordingly.

Head side engaging body 56 and case side engaging body 66
Are disposed between the double walls provided in the main body case 1, so that, for example, when the electric razor falls to the floor, the impacted head-side engaging body 56 comes out of the case-side engaging body 66. Is prevented by the inner and outer walls, and the reliability of the switching mechanism can be improved.

According to the electric razor in which the razor head 2B can be tilted back and forth, and the shaving block 91 including the inner blade 20 and the outer blade 21 is supported to be able to swing back and forth with respect to the razor head 2B, The shaving can be performed in a state where both the shaving block 91 and the razor head 2B are tilted back and forth in a complex manner, so that the following operation of the shaving cut surface with respect to a change in the skin surface can be made smoother, so that the skin is stressed. Suitable beard cutting can be carried out without giving whiskers.

The forward / backward tilt angle θ1 of the shaving block 91
Is set to be larger than the front-back tilt angle θ2 of the razor head 2B with respect to the main body case 1, the shaving block 9
By tilting the razor head 1, the beard cutting surface can be brought into close contact with a change in the skin surface, so that the razor head 2 is excessively compared with the case where θ2 is set to be larger than θ1.
Avoid that B tilts and becomes fluffy,
The beard cut surface can be more appropriately fitted to the skin.

According to the electric razor in which the tension of the spring 92 for urging the shaving block 91 is set smaller than the tension of the spring 80 for urging the razor head 2B.
For example, when the beard cut surface is reciprocated along the skin in small increments, the shaving block 91 can be tilted with a smaller force. It can be moved smoothly.

[0031]

1 to 16 show an embodiment of a water-washable electric shaver according to the present invention. 2 to 4, an electric razor includes a cylindrical main body case 1 having an open upper surface and a lower surface, an operating unit 2 inserted and loaded into the main body case 1, and a bottom cover 3 for closing the case opening on the lower surface side. And a front cover 4 and a display panel 5 mounted on the front outer surface of the main body case 1, and a sharp blade unit 6 and a switching knob 7 disposed above and below the rear surface of the case. Above and below the display panel 5, a switch button 8 for starting the motor, a mode switching button 9 for switching the operation mode, and an indicator light 10 for displaying a switching state of the buttons 8.9 are provided. Reference numeral 11 denotes a slide knob for switching the pressing reaction force of the razor head 2B between large and small, the details of which will be described later.

In FIG. 3, the operating unit 2 comprises an electric component unit 2A on the lower half side and a razor head 2B provided on the upper part, and a waterproof seal (rubber elastic material) is provided between these two units 2A and 2B. Sealed at 15. This waterproof seal 15 is provided with a razor head 2B as described later.
It functions as an elastic material that pushes up and urges the auxiliary. The electrical component unit 2A is configured by assembling a secondary battery 17, a circuit board 18 on which switches, LEDs, electronic components and the like are mounted on an inner frame 16 made of a plastic molded product. A razor head 2B has a motor 19 and a shaving block 91 in which a pair of front and rear rotary inner blades 20, outer blades 21, and center blades 38 are assembled.
And a transmission mechanism for transmitting motor power to the inner blade 20 and the sharp blade unit 6.

The operating unit 2 is loaded into the main body case 1, the electrical component unit 2A and the bottom cover 3 fitted inside the main body case 1 are fastened with screws, and the waterproof seal 15 is sealed with the sealing wall 54 of the main body case 1. By sealing the fastening part on the bottom lid 3 side with an O-ring or packing,
Water is prevented from entering the electrical component unit 2A, and the razor head 2B can be washed with water. The output shaft 19a of the motor 19 is provided with a watertight packing 12 (see FIG. 5).

In FIG. 4, the razor head 2B includes a motor base 22 to which the motor 19 is fixed, a head frame 23 assembled to the motor base 22 in order, and the inner blade support base 2.
4, the inner blade frame 25, the outer blade holder 26, and a number of parts assembled to these outer shells. The inner cutter 20 is attached to the inner cutter frame 25, and the outer cutter 21 and the center cutter 38 are attached to the outer cutter holder 26, respectively. A first transmission chamber 27 is provided below the razor head 2B,
Further, a second transmission chamber 28 is defined on one side thereof. The power of the motor 19 is first transmitted laterally through a gear group housed in the first transmission chamber 27 and then upward by a winding transmission mechanism housed in the second transmission chamber 28, and the final gear 29 and the inner cutter It is transmitted to a pair of front and rear inner blades 20 via a gear 30.

In FIGS. 5 and 6, the gear group includes four spur gears G1 to G4 that reduce the power of the motor and transmit the power.
It is composed of a pair of bevel gears 33 and 34 provided between an intermediate shaft 32 penetrating the partition wall 31 left and right and a final gear G4. In order to prevent gear noise generated from the gear group from propagating from the first transmission chamber 27 to the second transmission chamber 28 without passing through, the partition between the transmission chambers 27 and 28 is partitioned by a partition wall 31. As shown in FIG. 5, two eccentric cams 35 and 36 are provided on the upper part of the first stage spur gear G1 fixed to the output shaft 19a of the motor 19.
The eccentric cams 35 and 36 allow the vibrator 37 for the razor blade and the vibrator 39 for the center blade 38 to be simultaneously driven back and forth.

As shown in FIG. 7, the winding transmission mechanism includes a driving pulley 42 fixed to the intermediate shaft 32 and a final gear shaft 43.
Driven pulley 44 fixed to the
, And a tension member 46 disposed outside the locus transition trajectory of the timing belt 45. The tension body 46 can swing back and forth around a shaft 47, and is urged to swing in a counterclockwise direction by a spring 48, so that a roller 49 at the tip circumscribes the timing belt 45 to adjust the tension.

The motor base 22 is composed of a frame having an open upper surface surrounded by front and rear walls and left and right walls. As shown in FIGS. 8 and 9, the motor 19 and the motor holder 51 are fixed to the lower surface thereof. is there. The inner peripheral edge 15a of the waterproof seal 15 is vertically held and fixed between the motor stand 22 and the motor holder 51. Outer periphery 1 of waterproof seal 15
5b is fitted and mounted in a mounting groove 53 (see FIG. 10) provided on the outer peripheral surface of the inner seal wall 52 above the inner frame 16. The outer peripheral surface of this fitting portion is in close contact with the inner surface of the seal wall 54 on the upper inner surface of the main body case 1 to seal the space between the main body case 1 and the inner frame 16. A pair of front and rear leg pieces 55 project from lower portions on both sides of the motor base 22, and a projection (head-side engagement body) 56 formed of a round shaft is formed on the outer surface of the tip end. The function of the leg piece 55 will be described later.

The motor holder 51 is a cylindrical frame-like case that opens upward, and a pair of front and rear retaining leg pieces 57 is provided at upper portions on the right and left side surfaces so as to protrude.
A spring seat 58 protrudes between them. An inner seal wall 52 for accommodating the motor holder 51 is provided in a circular shape on an upper portion of the inner frame 16, and a pair of front and rear receiving claws 59 corresponding to the holding leg piece 57 and the spring seat 58 are provided on left and right inner bottom walls. Spring seat 6
0 is provided. By attaching the motor holder 51 to the inner frame 16 with the compression coil-shaped spring (elastic material) 80 disposed between the upper and lower spring seats 58 and 60, the claw at the lower end of the holding leg piece 57 receives the claw 59. , The razor head 2B is held against the electrical component unit 2A against the elasticity of the spring 80 so as not to come off. When the operating unit 2 is incorporated in the main body case 1, the spring 80 is located within the area covered by the waterproof seal 15, as shown in FIG. 5, so that the squeak noise of the spring 80 can be reliably prevented from leaking out of the case.

To partially restrict the floating operation of the razor head 2B, a switching mechanism is provided between the razor head 2B and the main body case 1. In FIG. 12, the switching mechanism
Frame 62 disposed between main body case 1 and front cover 12
And a slide knob 1 arranged at the upper front of the front cover 12
1, a cam structure for converting the left / right sliding operation of the slide knob 11 into an up / down operation, and a pair of left and right leg pieces 55 provided on the motor base 22 for inheriting the operation of the frame 62.

In FIG. 13, the frame body 62 is made of a stainless steel press fitting integrally provided with a pair of left and right arms 63 and a frame base 65 for connecting the both arms 63 via an inclined wall 64. Each arm 63 is provided with a vertically elongated oval groove (a case-side engaging body) 66 that engages with the projection 56 of the leg piece 55. A step-like cam portion 6 is provided at the center upper edge of the frame base 65.
7, and a downward notch 68 is formed at the lower edge thereof.

As shown in FIGS. 12 and 14, the frame 6
2 is arranged along the outer opening edge of the seal wall 54 of the main body case 1 in a state where the groove 66 of the arm portion 63 is engaged with the projection 56 of the leg piece 55, so that the main body case 1 and the front cover 4 Only the vertical movement is freely slid and guided by the double wall. For more information,
The frame base 65 can slide up and down along the outer surface of the seal wall 54 with the frame base 65 sandwiched between the seal wall 54 of the main body case 1 and the guide portions 70 provided on the left and right of the upper wall of the front cover 4. Further, a pair of left and right ribs 71 (see FIG. 13) projecting from the outer surface of the seal wall 54 guide the vertical vertical side edge of the notch 68 to restrict the frame body 62 from tilting left and right. are doing. At the time of vertical sliding, the inclined wall 64 is received by the partially arc-shaped corner portions 72 located on both sides of the seal wall 54, which also helps to restrict the frame body 62 from tilting left and right. . As described above, a part of the main body case 1 is formed by the double wall,
And the groove 66 of the arm 63 is housed between the double walls, for example, when the electric shaver falls to the floor, it is ensured by the inner and outer walls that the impacted projection 56 comes out of the groove 66. Can be prevented.

The slide knob 11 is supported so as to be slidable left and right along a slide groove 73 provided in the front cover 4. The cam structure includes a cylindrical roller 74 disposed on the inner surface of the slide knob 11 and rotatably supported by a shaft, and a cam 67 provided on the frame base 65. The roller 74 is rotatably engaged and held by a claw 75 provided on the inner surface of the slide knob 11, and the step on the peripheral surface thereof comes into contact with the inner edge of the opening of the slide groove 73, so that the slide knob 11 cannot be dropped. keeping. When the slide knob 11 is attached to the front cover 4, the peripheral surface of the roller 74 is
7 and is received by a guide recess 76 provided at the upper edge of the seal wall 54. That is, the slide knob 11 is guided and supported directly by the front surface of the front cover 4, the slide groove 73, and the guide recess 76, or indirectly via the roller 74.

As shown in FIG. 12, in a normal state, the roller 74 is fitted into the lower step portion of the cam portion 67,
At this time, the projection 56 is located at the upper end of the groove 66. When the slide knob 11 is slid rightward from this state as shown in FIG. 15, the frame 62 is pushed down against the urging force of the spring 80, and the upper step is received by the roller 74. And is held immovable. That is, the razor head 2B is switched from the floating position where full floating is possible (the state shown in FIG. 2) to the restricted position where the floating operation is restricted (the state shown in FIG. 15). Incidentally, the razor head 2B in this embodiment can move down by about 4 mm in the floating position, but in the regulation position, the descending stroke is regulated to 1.5 mm. When the razor head 2B is pushed in by the entire floating stroke, the spring 80 is fully compressed, so that the razor head 2B cannot be further lowered. At this time, the protrusion 56
Is opposed to the lower end of the groove 66 via a slight gap.

As described above, the razor head 2B can float up and down with respect to the main body case 1, and when the razor head 2B moves up and down, the arm 63 of the frame 62 slides and guides the outer surface of the leg piece 55, and the razor head 2B Right and left movement. Also, the groove 66
Regulates the back-and-forth movement of the projection 56 so that the vertical sliding locus of the projection 56 is always constant. The protrusion 56 is formed with a round shaft,
By forming the groove 66 as an elliptical groove and securing the floating gap E1 between the front and rear of the motor base 22 and the main body case 1, the razor head 2B can be positioned at the floating position and the regulating position, or at an arbitrary vertical position. As shown in FIG. Further, by securing the floating gap E2 between the leg piece 55 and the seal wall 54, the razor head 2
B can be tilted left and right at any vertical position as shown in FIG.

The left and right leg pieces 55 are arranged on both left and right sides of the main body case 1, and the left and right distance between the leg pieces 55 is much larger than the left and right distance between the springs 80. Therefore, as shown in FIG. 1, when the razor head 2 </ b> B is pushed down, for example, at the left end and diagonally sinks into the main body case 1 with the right projection 55 as a fulcrum, the left spring 80 and the right spring 80 are used. Are also compressed and deformed. Therefore, at the same time as the external force is released, the posture of the razor head 2B can be immediately restored by the two springs 80. That is, the response speed when the razor head 2B returns to the floating position can be improved.

In FIG. 4, the head frame 23 has a case portion 82 that opens downward, and side walls 83 erected on both right and left ends of the case portion 82. By fixing, both 2
A first transmission chamber 27 is defined between the joining surfaces 2 and 23.
In this joined state, the side wall 83 and the partition wall 31 are flush with each other, and the two transmission chambers 28 are defined by the two walls 31 and 83 and the cover 84 put on them. The cover 84 is detachably engaged and fixed to the side wall 83.

The inner blade support 24 includes a base 85 having a section that opens upward, a pair of left and right arms 86 erected from both left and right ends thereof, and a lid 87 that closes the upper surface opening of the base 85.
Consists of By supporting the shafts provided on the upper parts of the left and right arms 86 by the bearings 81 on the upper part of the side wall 83 of the head frame 23, the inner blade support 24 can swing back and forth, that is, the entire shaving block 91 It is pivotally supported on the frame 23 so as to swing. An inner blade frame 25 described later is removably press-fitted between the pair of arms 86. Inside the base 85, there are provided a lock mechanism for locking and holding the outer blade holder 26 fitted to the inner blade support base 24 so as not to come off, and a vibrator 39 for the center blade 38.

The inner blade frame 25 includes a base wall 88 and a base wall 8.
8 and a pair of side walls 89 erected at both left and right ends, and a pair of front and rear inner blades 20 are rotatably supported between upper ends of both side walls 89 respectively. A small-diameter inner cutter gear 30 is fixed to the left inner cutter shaft as viewed in FIG. 4, and this gear 30 meshes with a final gear 29 provided on the inner cutter frame 25 to reduce the motor power. At the same time. In order to clean the inner blade, a rotating brush 90 is arranged below each inner blade 20, and the left and right ends thereof are rotatably supported by slide pieces assembled to the side wall 89. The inner blade frame 25 is engaged with the inner blade support 24 from above and forms a shaving block 91.
The front-back tilt angle θ1 of the shaving block 91 (FIG. 7)
) Is set to be larger than the front-rear tilt angle θ2 of the razor head 2B with respect to the main body case 1 (see FIG. 16). The tilt angle is set to be larger than the total tilt angle of the forward tilt angle θ2 and the backward tilt angle θ2 ′. When organized,
(Θ1> θ2, θ1> θ2 ′), and (θ1 + θ1>
θ2 + θ2 ′). The tension of the spring 92 (see FIG. 3) that returns and urges the shaving block 91 is
The tension is set to be smaller than the tension of the spring 80 for urging the razor head 2B to return. Incidentally, if the shaving block 91 can be tilted with a smaller force than the razor head 2B, it is not always necessary to urge the return with a spring, and the spring can be omitted. In this case, the position is held by the friction between the bearing 81 of the head frame 23 and the shaft portion of the inner blade support 24 supported by the bearing 81.

When the electric razor is used, the slide knob 11 is switched between the soft position and the hard position in accordance with the condition of the skin or the beard, and the reaction force for pushing down the razor head 2B is set to either hard or soft. For example, when shaving is performed normally, the slide knob 11 is positioned at the soft position so that the razor head 2B can be fully floated, and the razor head 2B can be easily submerged and easily adhere to the skin. In the case of performing deep-deeping, the slide knob 11 is slid to the hard position to increase the depressing reaction force of the razor head 2B, thereby enabling deep-deeping. In the restricted position, the spring 80
Holds the razor head 2B in a partially compressed state, so that the razor head 2B can be pressed with a smaller pressing force.
Can be pressed strongly against the skin, and as a result, it can be deepened. At this time, the lower end of the arm part 63 is received by the main body case so as not to descend.

The razor head 2B can float up and down against the pushing force of the spring 80 and the waterproof seal 15 in both the floating position and the regulating position, and can tilt back and forth and left and right. The razor head 2B is mainly pushed up and urged by two springs 80, and a connecting portion between the head-side engaging body (projection) 56 and the case-side engaging body 66 (groove), that is, an arm of the frame body 62 63 (connecting portion) prevents it from falling off. Therefore, when the razor head 2B is pushed in and the projection 56 and the upper end of the groove 66 are separated from each other,
The razor head 2B is supported by only two springs 80, that is, is supported in an extremely unstable state. Therefore, the razor head 2B can only tilt in accordance with the external force, and as a result, the cut face of the whisker can smoothly follow the skin.

In the above-described embodiment, the projection 56 is brought into contact with the razor head 2B by using the frame 62 for restricting the floating operation. However, this is not necessary. A member corresponding to 63 can be attached to the main body case 1 to engage and hold the leg piece 55. The groove 66 can be integrally formed on the inner surface of the main body case 1. Of course, the case-side engaging body can be formed by the projection 56 and the head-side engaging body can be formed by the groove. The groove can be formed by a notch, a concave portion, a long hole-shaped boss, or a frame. In short, if the leg piece 55 and the frame 62 are connected in a state where the razor head 2B is allowed to move downward. Good. In the above embodiment, in a state where the razor head 2B is assembled to the electrical component unit 2A, the retaining leg pieces 57 are engaged with the receiving claws 59 in order to integrate them integrally so that they cannot be separated. Depending on the shapes of the motor base 22 and the main body case 1, the holding leg pieces 57 and the receiving claws 59 can be omitted. In this case, the protrusion 56 can be directly provided on the side surface of the motor base 22.

In the above embodiment, since the slide knob 11 is supported by the front cover 4 so as to be slidable left and right, the movement between the slide knob 11 and the frame 62 needs to be converted from the left and right movement to the up and down movement. However, when the slide knob 11 is vertically switched, the cam structure can be omitted. However, in this case, in order to hold the position of the slide knob 11 at the regulation position, a position holding structure such as an articulation mechanism or a position lock mechanism is added. The slide knob 11 can be configured in a push button shape, a rotary dial shape, or the like in addition to sliding left and right or up and down.

The cam portion 67 provided on the frame body 62 can be formed in two or more stages, three stages or four stages in a required number of stages. In addition to the cam structure 63, the frame 62 can be moved down by a swing lever. The present invention can also be applied to an electric razor provided with only one inner blade 9, an electric razor provided with a reciprocating inner blade, or an electric razor in which the inner blade rotates around a vertical axis. Inner blade support 24 of razor head 2B
The inner cutter frame 25 may be supported by the head frame 23 so as not to swing.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a floating structure of a razor head.

FIG. 2 is a front perspective view of the electric shaver.

FIG. 3 is an exploded side view in which only a main body case is sectioned.

FIG. 4 is an exploded front view of the razor head.

FIG. 5 is a vertical sectional front view of the razor head.

FIG. 6 is a cross-sectional plan view showing a gear transmission mechanism.

FIG. 7 is a side view of the winding transmission mechanism.

FIG. 8 is an exploded sectional view showing a connection structure between a razor head and an electrical component unit.

FIG. 9 is an exploded sectional view of a motor peripheral portion.

FIG. 10 is an exploded perspective view of a motor base and an inner frame.

FIG. 11 is a vertical side view of a razor head.

FIG. 12 is a schematic front view showing a state where the razor head is switched to a floating position.

FIG. 13 is an exploded perspective view of the switching mechanism.

FIG. 14 is a cross-sectional plan view of the switching mechanism.

FIG. 15 is a schematic front view of a state in which the razor head is switched to a regulation position.

FIG. 16 is a partially cutaway side view showing the razor head tilting forward and backward.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Operating unit 2A Electrical component unit 2B Razor head 15 Waterproof seal 16 Inner frame 19 Motor 22 Motor stand 51 Motor holder 55 Leg piece 56 Projection 62 Frame 66 Groove (case side engaging body) 80 Spring

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yusuke Okamoto 4680 Ikata, Ogata-machi, Tagawa-gun, Fukuoka Prefecture Inside Kyushu Hitachi Maxell Co., Ltd. F-term in Kyushu Hitachi Maxell, Ltd. (reference) 3C056 EE00 EE01 EE05

Claims (13)

[Claims] 1. A razor head 2B including a motor 19 and an inner blade 20 driven by a motor power, and a main body case 1 supporting the razor head 2B. The razor head 2B is housed in the main body case 1. The elastic member including a pair of left and right springs 80 is pushed up and urged to float and is supported between the razor head 2B and the main body case 1. The razor head 2B is prevented from falling out against the urging force of the elastic member. And a head-side engaging body 56 which engages with the razor head 2B in a state of allowing the razor head 2B to slide downward and allowing the razor head 2B to tilt left and right. And a case-side engaging body 66. 2. An operating unit 2 comprising an electric component unit 2A and a razor head 2B provided on an upper part of the main unit case 1. The electric component unit 2A is composed of the main unit case 1. The razor head 2B has an inner frame 16 fixed to the
2 and a pair of right and left springs 80 for floatingly supporting the razor head 2B between the inner frame 16 and the motor base 22. 2. The electric shaver according to claim 1, wherein a head-side engaging body is provided on both sides of the second body, and a case-side engaging body serving also as a slide guide of the head-side engaging body is arranged in the main body case. 3. 3. The elastic member comprises a pair of left and right compression coil springs 80 and a rubber elastic member 15 provided between the razor head 2B and the main body case 1.
Electric razor as described. 4. A waterproof seal 15 provided between the razor head 2B and the main body case 1 also serves as a rubber elastic material. The waterproof seal 15 includes a motor base 22 and a motor holder 51, an inner frame 16 and a main body case. The electric razor according to claim 1, 2 or 3, wherein the electric razor is disposed between the electric component unit 1 and the upper part of the electric component unit 2A. 5. A waterproof seal 15 formed by molded packing.
Of the waterproof seal 15 is fixed by the seal wall 54 of the main body case 1 and the inner seal wall 52 provided on the inner frame 16. The electric shaver according to claim 1, 2, 3 or 4, wherein the pair of right and left springs (80) is disposed inside and outside of the waterproof seal (15). 6. The contact portion between the head-side engaging body 56 and the case-side engaging body 66 is located on the left and right sides outside the spring center axis of the spring 80. Electric razor as described. 7. The head-side engaging body 56 and the case-side engaging body 6
6 so as to be rotatable relative to each other, and the razor head 2
The electric shaver according to claim 1, 2, 3, 4, 5, or 6, wherein B can be tilted back and forth around the engagement members 56 and 66 at an arbitrary floating position. 8. One of the head-side engaging body and the case-side engaging body is a projection 56, and the other is formed by a vertically long groove 66. Electric razor as described. 9. A switching mechanism is provided between the main body case 1 and the razor head 2B for switching the vertical position of the razor head 2B and changing the reaction force of pushing down the razor head 2B by the spring 80 into a plurality of stages. The switching mechanism is a slide knob 1 provided on the outer surface of the main body case 1.
1, a frame body 62 that is vertically operated by the slide knob 11,
The razor head 2B includes a pair of leg pieces 55 protruding below the motor base 22 constituting the razor head 2B and taking over the lowering operation of the frame body 62. The leg pieces 55 and the frame body 62 move the razor head 2B up and down. 4. The connecting member of claim 1, wherein said groove is connected to a head-side engaging member, and said groove also serves as a case-side engaging member. The electric shaver according to 4, 5, 6, 7 or 8. 10. The head-side engaging body 56 and the case-side engaging body 66 are arranged between double walls provided in the main body case 1. , 8 or 9. 11. A razor head 2B including a motor 19 and an inner blade 20 driven by motor power, and a main body case 1 for supporting the razor head 2B, wherein the main body case 1 and the razor head 2B And a head-side engaging body 56 and a case-side engaging body 66 that come into contact with each other while allowing the razor head 2B to tilt forward and backward, and a shaving block 91 including the inner blade 20 and the outer blade 21.
However, the electric razor is supported by the head frame 23 of the razor head 2B so as to swing forward and backward. 12. The electric shaver according to claim 11, wherein the front-back tilt angle θ1 of the shaving block 91 is set to be larger than the front-back tilt angle θ2 of the razor head 2B with respect to the main body case 1. 13. The electric shaver according to claim 11, wherein a tension of a spring for urging the shaving block is set smaller than a tension of a spring for urging the razor head.