JP2003117268A - Electric shaver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling by making main parts for constituting a razor head into a unit and to smoothly follow the skin by holding the razor head to be lifted in a reciprocatively movable electric shaver. SOLUTION: The shaver consists of a cylindrical main body case 1 and an operation unit 2. The operation unit 2 includes an electrical component unit 2A to be housed in the main body case 1 and the razor head 2B arranged on it. A driving base 21 housing a vibrator 24, a base lid 22 for covering an opening on the upper surface of the driving base 21 and a motor 15 which is arranged on the lower surface of the driving base 21 so as to drive the vibrator 24 among the respective parts for constituting the razor head 2B are made into a unit as a driving unit 16. The razor head 2B is held by lifting with a pair of right and left springs 39 and tilted in front-rear and left-right directions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver provided with a vibrator for converting a rotational movement of a motor into a reciprocating movement.

[0002]

2. Description of the Related Art An electric shaver in which a head portion of this type is unitized is known from Japanese Patent Application Laid-Open No. 8-182872. There, the outer blade holder, the inner blade, the motor, and the drive mechanism are unitized, and the drive unit is supported by the main body case so as to be vertically movable and tiltable in the left-right direction. Specifically, the above drive unit is supported by the main body case so as to be vertically movable via three support legs made of independent parts, and the drive unit is pushed up and urged by a spring arranged between the support legs. The support legs and the motor case are connected via a spherical seat, and a gap that allows tilting is provided between the drive unit and the main body case.Thus, the three support legs each resist the spring. It can slide independently by sinking. That is, the drive unit can absorb tilting in the front-back, left-right, or diagonal directions.

In the electric shaver according to the embodiment of the present invention, two inner blades are reciprocally driven in mutually opposite directions. An electric shaver that adopts this type of driving form is disclosed in Japanese Patent Application Laid-Open No. 10-17.
It is known from Japanese Patent No. 4789. There, main parts such as a battery, a motor, and a vibrator are assembled into a mounting base to form a unit, and the unit body is housed in a main body case.

[0004]

In the former electric shaver, the drive unit is supported by the three sets of support legs and the spring, so that the drive unit can be supported in a floating state in a stable state, but a floating support structure including the drive unit. Is complicated and inevitably requires a lot of trouble in assembling. In this respect, as seen in the latter electric shaver, if the main parts such as the motor and the vibrator are assembled into the mounting base to form a unit, the assembly can be easily performed. However, as long as many parts are assembled to the mounting base, it becomes unavoidable that it is difficult to support the razor head in a floating manner.For example, it is effective to make the razor head always follow the skin in close contact. Can't do beard cutting.

It is an object of the present invention to provide a reciprocating electric shaver capable of effectively cutting a beard while uniting the main parts so that the main case can be easily assembled. An object of the present invention is to support a razor head in a floating state in an unstable state, so that the razor head can be smoothly tilted following changes in the surface of the skin, and the unit body including the razor head can be easily assembled. Providing a reciprocating electric razor. An object of the present invention is to provide an electric razor capable of suppressing the leakage of drive noise from the drive mechanism section and suppressing the noise level during use. An object of the present invention is to switch the contact state of the razor head to the skin to be soft or soft according to the beard state and preference of the user, and to give the skin a hard shaving taste suitable for deep shaving and bristles and to give stress to the skin. To provide a switchable electric razor with a soft shaving taste.

[0006]

The electric shaver of the present invention comprises a cylindrical main body case 1 and an operating unit 2 mounted in the main body case 1. The operation unit 2 is composed of an electric component unit 2A housed in the main body case 1 and a razor head 2B provided on the upper part thereof. The razor head 2B includes a drive base 21 that houses the vibrator 24, a base cover 22 that covers the upper opening of the drive base 21, and a motor 15 that is mounted on the lower surface of the drive base 21 and drives the vibrator 24. The drive table 21, the vibrator 24, the table cover 22, and the motor 15 are unitized as a drive unit 16.

Specifically, the motor 15 is housed in a motor holder 23 fixed to the lower surface of the drive base 21.

The upper and lower sides of the drive chamber R, which is defined by the drive base 21 and the base cover 22, surround the first seal 30 for sealing the periphery of the output shaft 26 of the motor 15 and the periphery of the connecting portion 24a of the vibrator 24. It is sealed with the second seal 31 for sealing.

A space between the drive unit 16 and the upper opening of the main body case 1 is sealed by a waterproof seal 10 made of molded packing, and the lower opening of the main body case 1 is watertightly sealed by a bottom lid 3 attached to the waterproof seal 10. It has been stopped.

The razor head 2B is supported by an elastic body including a pair of left and right springs 39 housed in the main body case 1 so as to be pushed up and urged so as to be vertically supported so as to be movable up and down. Between the drive unit 16 and the inner frame 11 of the electric component unit 2A, there are provided a movable engaging piece 42 and a fixed engaging piece 43 for holding the razor head 2B against the biasing force of the spring 39 and preventing it from coming off. Is provided, and the razor head 2B is swingably supported in all circumferential directions including front and rear and left and right in a state where both the engaging pieces 42 and 43 are separated.

The pushing down reaction force of the razor head 2B is set to be larger than the spring force P of the inner blade spring 47 for pressing and urging the inner blade 18 toward the outer blade 25.

A lock mechanism is provided between the main body case 1 and the razor head 2B to prevent the razor head 2B from moving downward. The lock mechanism includes a switching tool 8 provided on the outer surface of the main body case 1, an abutment section 52 provided on the drive unit 16 side and abuttingly engaged with the switching tool 8, a switching tool 8 and an abutment section 52. And a cutout portion 51 provided on either one of the above. The switching tool 8 can be switched between a locked position that abuts and engages with the abutment portion 52 to prevent the razor head 2B from moving downward and an unlock position that allows the razor head 2B to move downward.

The upper periphery of the waterproof seal 10 has a drive base 21.
It is sandwiched and fixed to a joint with a motor holder 23 fixed to the lower surface thereof, and the lower peripheral edge of the waterproof seal 10 is sandwiched and fixed to a joint between the main body case 1 and the inner frame 11. Between the opening peripheral wall 59 of the main body case 1 and the waterproof seal 10, a skirt portion 50 that covers the upper outer surface of the waterproof seal 10 is formed so as to project from the drive base 21. A contact portion 52 and a cutout portion 51 are formed on the skirt portion 50 facing the switching tool 8.

The motor holder 23 is disposed in the upper loading portion of the inner frame 11 of the electric component unit 2A, and is floatingly supported by an elastic body including a spring 39 provided therebetween. Then, between the motor holder 23 and the inner frame 11,
A gap E1 is provided to allow the motor holder 23 to tilt.

[0015]

According to the present invention, the operating unit 2 loaded in the main body case 1 is constituted by the electric component unit 2A housed in the main body case 1 and the razor head 2B provided on the upper portion thereof. Furthermore, razor head 2B
A member that constitutes a main part of the driving table 21, that is, a driving table 21 that accommodates the vibrator 24, and a table lid 22 that covers an upper surface opening of the driving table 21.
Since the motor 15 mounted on the lower surface of the drive base 21 and driving the vibrator 24 is unitized as one drive unit 16, the drive unit 16 and the razor head 2B
Can be easily assembled in a state of being separated from the main body case 1. That is, since the vibrator 24 can be fastened together with the screw 33 between the box-shaped drive base 21 and the box-shaped base cover 22, the mounting base as seen in the conventional example (Japanese Patent Laid-Open No. 10-174789) is Compared to the assembly method in which the mounting base is temporarily assembled and then the mounting base is slid into the main body case and screwed, there is less risk that the resonator will come off during the assembly, and the drive unit 16 can be easily assembled. it can.

When the motor 15 is housed in the motor holder 23 fixed to the lower surface of the drive base 21, the razor head 2B can be floatingly supported by receiving the motor holder 23 with the spring 39, so that the motor 15
The floating support structure is simplified and the assembly can be performed easily as compared with the case where is directly fixed to the lower surface of the drive base 21. The waterproof seal 10 can more reliably seal between the razor head 2B and the main body case 1.

The upper and lower sides of the drive chamber R are sealed by a first seal 30 that seals the periphery of the output shaft 26 of the motor 15 and a second seal 31 that seals the periphery of the connecting portion 24a of the vibrator 24. According to the electric razor, the space around the motor 15, the drive chamber R, and the space around the inner blade 18 is divided into the first space,
It is possible to prevent drive noise from leaking out and resonating between the spaces by sealing and partitioning with the second both seals 30 and 31, thus improving the quietness of the electric razor in use.

A space between the drive unit 16 and the upper opening of the main body case 1 is sealed with a waterproof seal 10 made of molded packing, and the lower opening of the main body case 1 is water-tightly sealed by a bottom lid 3 attached to this. When stopped, the electric component unit 2A housed inside the main body case 1 can be held in a watertight manner, so that the electric razor can be washed with water, and electrical failure such as contact failure due to foreign matter entering the main body case 1 is sure. Prevents the increase in reliability during long-term use.

The razor head 2B is composed of a pair of left and right springs 39.
The razor head 2B with a spring 39 by a movable engagement piece 42 and a fixed engagement piece 43 provided between the razor head 2B and the main body case 1.
When the retaining structure is held against the biasing force of, the floating support structure can be simplified and the labor for assembling can be saved as compared with the conventional type in which the razor unit is floating supported by three support legs and springs. The manufacturing cost of the electric razor can be reduced accordingly. Since the razor head 2B is pushed up and urged by the pair of left and right springs 39 and the razor head 2B is floatingly supported in an unstable state, the razor head 2B can be tilted smoothly following changes in the skin surface and can be ignored. Friction resistance can be reduced to a certain degree. Therefore, the razor head 2
The beard-cutting surface of B can always be made to closely follow the skin, and the beard-cutting can be effectively performed.

According to the electric razor in which the pushing down reaction force of the razor head 2B is set to be larger than the spring force P of the inner blade spring 47 which presses and urges the inner blade 18, the inner blade 18 and the outer blade are first in use. 25 and the razor head 2B sinks only when the sinking reaction force exceeds a certain value. When the outer blade 25 and the inner blade 18 that directly contact the skin are first sunk as described above, the outer blade 25 and the inner blade 18 follow the surface change of the skin and the inclination of the beard cutting surface. Therefore, the beard cutting can be effectively performed.

A lock mechanism is provided between the main body case 1 and the razor head 2B, and the switching tool 8 is operated to switch the razor head 2B so that it cannot be moved downward. If the razor head 2B is movable, the contact state of the razor head 2B with the skin can be switched between a hard state suitable for shaving deep shave and bristles and a soft state where stress on the skin is small. Therefore, the depression of the razor head 2B can be controlled according to the beard state and preference of the user.

When the upper peripheral edge of the waterproof seal 10 is clamped and fixed to the joint between the drive base 21 and the motor holder 23, and the lower peripheral edge of the waterproof seal 10 is clamped and fixed to the joint between the main body case 1 and the inner frame 11. Simply insert the operating unit 2 into the main body case 1 and load it, and the waterproof seal 10
The inside of the main body case 1 can be sealed by appropriately compressing and deforming the lower peripheral edge of the. By covering the upper outer surface of the waterproof seal 10 with the skirt portion 50, the waterproof seal 10 is prevented from being seen through the gap between the main body case 1 and the razor head 2B, and the appearance of the electric razor is improved. further,
Since the abutment portion 52 and the cutout portion 51 of the lock mechanism are formed by using the skirt portion 50, the lock function can be surely exhibited while avoiding a complicated structure of the razor head 2B.

The motor holder 23 arranged in the upper loading portion of the inner frame 11 of the electric component unit 2A is floatingly supported by the spring 39 and the waterproof seal 10, and the motor holder 23 and the inner frame 11 are provided with a motor. If the clearance E1 that allows the holder 23 to tilt is provided, the razor head 2B can be tilted not only vertically but also in the front-back and left-right directions, and the return operation to the original state can be speeded up. It can be tilted smoothly following changes in the skin surface, and its beard-cutting surface can be made to follow the skin in a state where it is always in close contact with the skin to perform more effective beard cutting.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of a water washable reciprocating electric shaver according to the present invention. 2 to 4, the electric shaver has a cylindrical main body case 1 having an upper surface and a lower surface opened, an operation 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.
A switch knob 4 for starting a motor, which is mounted on the outer front surface of the main body case 1, a knurling blade unit 5 and a switching knob 6 arranged above and below the rear surface of the case. Reference numeral 7 is a display for charging display, and 8 is a switching tool for switching the contact state of the razor head 2B to the skin between hard and soft.

The operating unit 2 is roughly classified into an electric component unit 2A on the lower half side which is enclosed in the main body case 1 and a razor head 2B which is provided above the electric component unit 2A. As shown in FIGS. 5 and 6, the electric component unit 2A includes an inner frame 11 made of a plastic molded product, a circuit board 12, and an inner frame 11.
The secondary battery 13 and the like are assembled and configured. Circuit board 1
A switch 14, which can be switched by the switch knob 4 described above, an LED, an electronic component, and the like are mounted on 2. The operation unit 2 is loaded in the main body case 1, the electrical component unit 2A and the bottom lid 3 fitted in the main body case 1 are fastened with screws, and the joint portion and the fastening portion on the bottom lid 3 side are fastened with an O ring or packing. By sealing and sealing the upper opening surface side of the main body case 1 with the waterproof seal 10, the electrical component unit 2A
Water is prevented from entering the side and the razor head 2B can be washed with water. As described below, the waterproof seal 10
Also serves as a rubber elastic member that pushes up and urges the razor head 2B. In addition, the main body opening of the display body 7 for charge display is sealed by ultrasonic welding of the display body 7, and the main body opening for the switch knob 4 for driving the switch 14 is also not shown in the drawing. It is sealed with.

In FIG. 8, the razor head 2B includes a drive unit 16 including a motor 15 and a drive unit 1.
An outer blade holder 17 that is detachably attached to 6,
It is composed of a pair of front and rear inner blades 18, a center blade 19, and the like. As shown in FIG. 9, the drive unit 16 includes a box-shaped drive base 21 whose upper and lower surfaces are opened and a box-shaped base cover 22 whose upper and lower surfaces are opened to cover the upper surface of the box-shaped drive base 21. The motor 15 is fixed by the base 21 and the motor holder 23 fixed to the lower surface thereof. Inside the drive base 21, as shown in FIG.
4 are arranged, and the upper and lower cam pieces fixed to the output shaft 26 of the motor 15 reciprocally drive the respective vibrators 24 in opposite directions. As shown in FIG. 4, the vibrator 24 located on the rear side of the case includes a drive arm 27 for driving the center blade 19 and a drive claw 28 for driving the knurled blade.
And are provided. The outer blade 25 and the center blade 19 are attached to the outer blade holder 17, respectively.

In a normal use state, drive noise is prevented from leaking from the drive chamber R defined by the drive base 21 and the base cover 22, and further, hair dust and water for washing enter the drive chamber R. In order to prevent this, the upper and lower sides of the drive chamber R are sealed with two types of seals. Specifically, as shown in FIG. 11, the first seal 30 is provided between the output shaft 26 of the motor 15 and the drive base 21.
The second seal 31 seals between the connecting portion 24a of the vibrator 24 and the base 22. Both first and second seal 3
Each of 0 and 31 is made of rubber molded packing.
The motor holder 23 is arranged on the lower surface of the drive base 21 and integrated with the drive base 21 by a screw 32 (see FIG. 10) screwed from the lower surface side. At that time, as shown in FIG. The peripheral wall is clamped and fixed between the end wall of the motor 15 and the lower surface of the drive base 21. Similarly, the upper peripheral edge of the waterproof seal 10 is attached to the seal wall 23 of the motor holder 23.
It is clamped and fixed between a and the lower surface of the drive base 21. Stand cover 22
Is the drive base 21 with the screw 33 screwed from the upper surface side.
The metal plate cover 34 that covers the upper surface of the base cover 22 and the base cover 32 clamp and fix the peripheral edge of the second seal 31. The cover 34 and each vibrator 24 are fixed together by using screws 33. In FIG. 11, reference numeral 35 is an O-ring for the screw 33. According to this structure in which the vibrator 24 is jointly fastened between the drive base 21 and the base cover 22 as described above, the vibrator is temporarily mounted on the mounting base as in the conventional example (JP-A-10-174789). As compared with the assembling method in which the mounting base is slid to the main body case and then screwed after assembling, there is less risk that the vibrator may come off on the way, and the driving unit 16 can be easily assembled.

Move the razor head 2B up and down, left and right, front and back,
Alternatively, a floating support structure is provided between the drive unit 16 and the inner frame 11 so as to be tiltable in an oblique direction. Specifically, as shown in FIG. 10, a circular seal frame 37 and a pair of left and right seats 3 are provided on the upper portion of the inner frame 11.
8 is provided, the motor holder 23 is supported by a pair of compression coil type springs 39 mounted on the left and right seats 38, and the lower peripheral edge of the waterproof seal 10 is fitted into the seal groove 40 of the seal frame 37. There is. In order to assemble the motor holder 23 inseparably with respect to the inner frame 11 against the biasing force of the spring 39 while maintaining the tiltable state in this manner, a pair of front and rear parts are provided at the lower portion of the seal wall 23a of the motor holder 23. A movable engaging piece 42 for preventing the slipping off is provided in a protruding manner. Further, fixed engaging pieces 43 that allow the receiving engagement of the movable engaging piece 37 are provided in front of and behind the seat 38 of the inner frame 11.

As described above, the razor head 2B is assembled into the upper loading portion of the inner frame 11 from above the seal frame 37 to obtain the operating unit 2 in which the electric component unit 2A and the razor head 2B are integrated. By assembling the operating unit 2 to the main body case 1, most of the assembly of the electric razor is completed. Therefore,
As a whole, the labor required for assembly can be saved. In addition, since the operation of the drive unit 16 and the operation unit 2 can be confirmed before being incorporated into the main body case 1, it is possible to detect an assembly error, a malfunction, etc. at an early stage and improve the reliability of the assembly work. It is also advantageous in that the inspection of the finished product after assembly can be simplified. When the operation unit 2 is assembled in the main body case 1, the outer surface of the lower peripheral edge of the waterproof seal 10 fitted in the seal frame 37 as shown in FIG. 11 is an inner seal wall provided on the inner surface of the opening of the main body case 1. Four
4 and the razor head 2B and the main body case 1 are sealed. In this sealed state, the main body case 1
The inside of the is sealed and the ingress and egress of air is restricted. In order to release the hydrogen gas generated when the secondary battery is charged, a gas discharge port 45 is opened at the lower front surface of the main body case 1 as shown in FIG. It is closed by a membrane 46 that can prevent passage. When the razor head 2B moves up and down against the spring 39, the film body 46
Although air flows in and out through the razor, the amount of passage therethrough is small, so that the reaction force for pushing down the razor head 2B is large. Specifically, as compared with the spring force of the inner blade spring 47 (see FIG. 8) that urges the inner blade 18 against the outer blade 25, the reaction force of pushing down the razor head 2B (the spring force of the spring 39 and the waterproof seal 10). ) Is set to a large value. It should be noted that, due to the air damper effect of the film body 46, the reaction force for pushing down the razor head 2B is further increased. The relationship is that the spring force of the inner blade spring 47 rises in the process of contraction of the inner blade spring 47, but at some point during the rise, the inner blade spring 47
It is set so that the time when the spring force exceeds the pushing down reaction force of the head 2B comes. Therefore, when a pushing-down force is applied to the outer blade 25 at the time of shaving, the inner blade 18 and the outer blade 25 first sink, and at some point the razor head 2B sinks. After that, this operation is repeated. In other words, when the outer blade 25 is pressed down while shaving, the inner blade 18 and the outer blade 25 operate so that the amount of depression is greater than the amount of depression of the razor head 2B. Therefore,
The beard cutting can be effectively performed by causing the outer blade 25 and the inner blade 18 to follow the surface change of the skin and the inclination of the beard cutting surface. When the inner blade 18 and the outer blade 25 are lowered to the sinking limit point, or the skin is brought into contact with the upper ends of the center blade 19 and the outer blade holder 17 which are fixed with some vertical play, the pressing force applied to the outer blade 25 is Directly added to the spring 39 and the waterproof seal 10, the head 2B is pushed down by the force to the sinking limit point. The above is the description of the relationship between the inner blade spring 47 on the front side, the spring 39 and the waterproof seal 10, but the inner blade spring 47 on the rear side and the spring 39.
The same applies to the relationship of the waterproof seal 10, and further,
The same relationship holds when the front and rear inner blades 18 and outer blades 25 simultaneously contact the skin surface.

In order to switch the contact state of the razor head to the skin between hard and soft depending on the user's beard state and preference, a lock mechanism for preventing the razor head 2B from moving downward is provided with the razor head 2B and the main body case 1. It is provided between In FIG. 12, the lock mechanism includes a switching tool 8 provided on the upper front surface of the main body case 1 so as to be slidable left and right,
A skirt portion 50 that extends in a circular shape at the bottom of the drive base 21.
And a contact portion 52 adjacent to the cutout portion 51.

As shown in FIG. 12, the switching tool 8 includes an oval knob 53, four leg pieces 54 protruding from the inner surface of the knob 53,
An engaging pin 55 is provided, and by engaging the four leg pieces 54 with the upper and lower edges of the slide groove 56 provided in the main body case 1, the slide piece 56 can slide left and right along the slide groove 56.
Inside the slide groove 56, a nodal arm 57 that contacts the upper and lower peripheral surfaces of the engagement pin 55 is integrally provided. Figure 12 (a)
As shown in FIG. 5, when the switching tool 8 is slid to the unlock position, the engaging pin 55 is located right below the cutout portion 51, so that the razor head 2B can move downward. When the switching tool 8 is slid to the lock position as shown in FIG. 12B from this state, the engaging pin 55 moves directly below the contact portion 52 and receives the lower surface of the skirt portion 50, so that the razor head. 2B cannot move down.

The skirt portion 50 blocks the waterproof seal 10 from being seen through the upper opening of the main body case 1,
It also helps improve the appearance of the electric razor. Further, when the razor head 2B sinks, the peripheral wall of the waterproof seal 10 tries to expand like an outward bulge, but the seal peripheral wall facing the notch 51 can be elastically deformed so as to enter the notch space. The razor head 2B can be smoothly depressed and moved. As described above, the waterproof seal 10 also cooperates with the floating support spring 39 to help push up and bias the razor head 2B. Incidentally, the tension characteristic of the spring 39 changes linearly, but in the case of the waterproof seal 10, the deformation stress increases sharply 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 springs 39 and the waterproof seal 10, as the shaving stroke of the razor head 2B increases, the pushing down reaction force can be increased to prevent the spring 39 from excessively deforming. Maintain the spring characteristics in proper condition for a long time. Further, as the depression stroke of the razor head 2B increases, the pushing down reaction force increases, so that the adhesion of the razor head 2B to the skin increases. The waterproof seal 10 is
It is a form in which the entire circumference of the motor holder 23 is enclosed and sealed, and when the razor head 2B tilts back and forth and left and right, it also has a function of returning to the original center position.

When the razor head 2B tilts, as shown in FIG.
As shown in FIG. 3, the skirt portion 50 and the motor holder 23, which are formed so as to project around the drive base 21, tilt together with the motor holder 23. In order to allow this tilting, a gap E1 is provided between the motor holder 23 and the inner frame 11 as shown in FIG. 3, and the skirt portion 50 and the opening peripheral wall surrounding the opening outer surface of the inner seal wall 44 of the main body case 1 are provided. A gap E between 59 and
Two are provided.

When the electric razor is used, the switching tool 8 is switched between the locked position and the unlocked position depending on the condition of the skin or whiskers, and the pushing down reaction force of the razor head 2B is set to either hard or soft. For example, when shaving normally, the knob 53 is located at the unlock position. At this time, since the engagement pin 55 is located directly below the cutout portion 51, the razor head 2B can be moved inward with a small force, and can easily come into close contact with the skin. In addition, when shaving bristles or performing deep shaving, the knob 53 is slid to the lock position, the abutment portion 52 is received by the engagement pin 55, and the sinking of the razor head 2B is restricted. So that you can deepen.

Incidentally, when the razor head 2B is pushed down against the biasing force of the spring 39, the movable engaging piece 42 and the fixed engaging piece 43 are separated from each other, so that the razor head 2B has two springs. This means that it is supported only by 39 and the waterproof seal 10, that is, in an extremely unstable state. Therefore, the razor head 2B has no choice but to tilt up and down, front and back, left and right, or diagonally according to the external force, and as a result, the beard cutting surface can smoothly follow the skin.

In the above embodiment, the motor 15 is sandwiched and fixed by the drive base 21 and the motor holder 23, but the motor 15 may be directly fastened and fixed to the drive base 21 by screws. The switching tool 8 does not have to be in the form of slidingly switching to the left or right or up and down, but may be in the form of swing switching,
It is possible to adopt a configuration in which a push operation is performed to switch or a rotary dial configuration. The engagement pin 55 is provided on the skirt portion 50 side, and the cutout portion 51 and the contact portion 52 are provided with the knob 53.
It may be provided on the side. The center blade 19 may be omitted, and the inner blade 18 may be at least one. Further, the structure is not limited to the structure in which the razor head 2B is supported in a floating manner with respect to the main body case 1 as in the embodiment, but may be a structure in which the razor head 2B is fixed to the main body case 1.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view of a disassembled razor head and its surroundings.

[Fig. 2] Overall front view

[Fig. 3] Overall vertical sectional front view

[Fig. 4] Overall vertical side view

FIG. 5 is a side view showing a main body case and an operating unit.

FIG. 6 is a front view in which all the constituent members are separated.

FIG. 7 is a side view of the razor head in a disassembled state.

FIG. 8 is an exploded perspective view around the drive unit.

FIG. 9 is a perspective view of the drive base and the base cover in a disassembled state.

FIG. 10 is an exploded perspective view showing the relationship between the motor holder and the inner case.

FIG. 11 is a vertical sectional front view of the main part around the drive unit.

FIG. 12 is a rear view of the switching tool as viewed from the inside of the case.

FIG. 13 is a partially cutaway vertical front view showing a tilted state of a razor head.

[Explanation of symbols]

1 body case 2 working units 2A Electrical equipment unit 2B razor unit 3 Bottom lid 8 Switch 10 waterproof seal 11 inner frame 15 motor 16 Drive unit 18 inner blade 21 Drive stand 22 Stand cover 23 Motor holder 24 oscillators 24a Transducer connection part 25 outer blade 26 Output shaft 30 First seal 31 Second seal 39 spring 42 Movable engagement piece 43 Fixed engagement piece 47 Inner blade spring 50 Skirt 51 Notch 52 Contact Department 59 Body case opening peripheral wall R drive room E1 gap

Claims (9)

[Claims] 1. A cylindrical main body case 1 and an operating unit 2 loaded in the main body case 1. The operating unit 2 is provided on an electric component unit 2A housed in the main body case 1 and an upper portion thereof. Razor head 2
The razor head 2B includes a drive base 2 for accommodating the vibrator 24.
1, a base cover 22 that covers the upper opening of the drive base 21, and a motor 15 that is mounted on the lower surface of the drive base 21 and drives the vibrator 24. The drive base 21, the vibrator 24, the base cover 22, and the motor 15
However, the electric razor unitized as the drive unit 16. 2. The electric shaver according to claim 1, wherein the motor 15 is housed in a motor holder 23 fixed to the lower surface of the drive table 21. 3. A first seal 30 for sealing the periphery of the output shaft 26 of the motor 15 and a connecting portion 24a of the vibrator 24 are provided above and below the drive chamber R defined by the drive base 21 and the base cover 22. The electric razor according to claim 1 or 2, which is sealed with a second seal 31 that seals the periphery. 4. A waterproof seal 10 made of molded packing is provided between the drive unit 16 and the upper opening of the main body case 1, and the lower opening of the main body case 1 is a bottom cover 3 attached to the waterproof seal 10. The electric razor according to claim 1, 2 or 3, which is sealed in a watertight manner. 5. A razor head 2B is supported by an elastic body including a pair of left and right springs 39 housed in the main body case 1 so as to be pushed up and urged so as to be vertically movable. Inner frame 1
1, a movable engaging piece 42 and a fixed engaging piece 43 for holding the razor head 2B against the biasing force of the spring 39 and retaining it are provided. The electric razor according to claim 1, 2, 3, or 4, wherein the razor head 2B is swingably supported in all circumferential directions including front and rear and left and right when 43 is separated. 6. The reaction force for pushing down the razor head 2B is
The spring force P is set to be larger than the spring force P of the inner blade spring 47 that urges the inner blade 18 toward the outer blade 25.
The electric razor according to 2, 3, 4, or 5. 7. A lock mechanism for preventing downward movement of the razor head 2B is provided between the main body case 1 and the razor head 2B, and the lock mechanism is provided with a switching tool 8 provided on the outer surface of the main body case 1.
And a contact portion 52 provided on the side of the drive unit 16 for contacting and engaging with the switching tool 8, and a cutout portion 51 provided on one of the switching tool 8 and the contact portion 52. 7. The tool 8 can be switched between a lock position for abuttingly engaging the abutment portion 52 to prevent the downward movement of the razor head 2B and an unlock position for permitting the downward movement of the razor head 2B. Electric razor described in either. 8. The drive base 2 is provided at the upper peripheral edge of the waterproof seal 10.
1 and a motor holder 23 fixed to the lower surface of the waterproof seal 10 are clamped and fixed at the joint, and the lower peripheral edge of the waterproof seal 10 is clamped and fixed at the joint between the body case 1 and the inner frame 11. A skirt portion 50 that covers the upper outer surface of the waterproof seal 10 is formed between the opening peripheral wall 59 of the case 1 and the waterproof seal 10 so as to project from the drive table 21. The skirt portion 50 that contacts the switching tool 8 contacts the skirt portion 50. The electric razor according to claim 7, wherein the portion 52 and the cutout portion 51 are formed. 9. The motor holder 23 is arranged in the upper loading portion of the inner frame 11 of the electric component unit 2A, and is floatingly supported by an elastic body including a spring 39 provided between the motor holder 23 and the inner frame. The electric shaver according to claim 8, wherein a gap E1 is provided between the electric shaver and the motor holder 11 to allow the motor holder 23 to tilt.