JPH05337257A - Reciprocating motion type electric razor - Google Patents

Abstract

PURPOSE:To provide the reciprocating motion type electric razor for improving its cutting quality by allowing an outer blade to be subjected to microvibration in the direction being orthogonal to the reciprocating motion direction of an inner blade body, raising laid-down whiskers, as well by utilizing the microvibration of this outer blade, and leading easily the whiskers into a whiskers leading-in hole of the outer blade. CONSTITUTION:A driving member 42 for transferring an output of a driving source 36 and allowing inner blade bodies B, B to execute a reciprocating operation is supported axially so as to be freely turnable by a main body in its middle position, and also, both end parts 45a, 45a opposed centering around this axially supporting point 43, and a middle end part 44a are connected through an eccentric cam 38 to the inner blade bodies B, B, and an output shaft 37 of the driving source, respectively. In such a state, a rotational output of the driving source 36 is transferred to the inner blade bodies B, B through the eccentric cam 38, the inner blade bodies B, B are subjected to reciprocating operation in the reverse direction to each other, and also, like a circular arc centering around the axially supporting point 43, and at least a part of the blade face of outer blades 32, 32 is subjected to microvibration in the direction being roughly orthogonal to the reciprocating motion direction of the inner blade body B.

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 having an inner blade body which is pressed against the inner surface of the outer blade of the outer blade body and reciprocates by a driving member.

[0002]

2. Description of the Related Art Conventionally, a reciprocating electric shaver of this type is disclosed in, for example, Japanese Patent Publication No. 58-55797. 9 and 10, a motor 2 is built in a housing 1 (only one half is shown) composed of a pair of engagable members, and an eccentric shaft 3 is fixedly mounted on the motor 2. The eccentric cam 4 is loaded. The driver element 5 has a rectangular main body 6, and the main body 6 is provided with notches 7 at its four corners and is thinly provided so that it can be bent into a parallelogram shape when viewed from a plane. A bearing portion 8 composed of a pair of ribs with which the eccentric shaft 3 engages is projected on one inner surface of the main body 6, and a pair of drive bushes 9 are provided on the upper edge surfaces of the center of both sides. .. Further, pivot pins 10 are projectingly provided on the upper and lower edge surfaces at the center of both ends of the main body 6, and four holding parts 11 projecting on the inner surface of the housing 1 composed of the pair of members are provided with the pair of members. The housing 1 is provided so as to be pivotally supported when the housing 1 is bound.
The drive bush 9 is connected to the guide bushes 13 of the pair of inner blades 12, and the pair of inner blades 12 are arranged so as to slide on the inner surfaces of a pair of outer blades (not shown).
Therefore, when the motor 2 is driven, the main body 6 of the driver 5 is swung via the eccentric shaft 3 of the eccentric cam 4 as shown in FIG. In this case, since the pivot pin 10 of the main body 6 is pivotally supported by the holding portion 11 of the housing 1, if the eccentric shaft 3 is eccentrically rotated in the bearing portion 8, the main body 6 will have a parallelogram shape as described above. As a result, the one side portion of the main body 6 reciprocates, and the other side portion reciprocates in the opposite direction to the one side portion. Therefore, the shaving operation is performed by the inner blades 12 linked to the drive bush 9 reciprocatingly sliding on the inner surfaces of a pair of outer blades (not shown) in opposite directions.

[0003]

However, in the reciprocating electric shaver of the above construction, the pair of inner blades only reciprocates linearly while keeping parallel to each other, and the reciprocation of the inner blades is reciprocal. The outer blade does not deform or move in the direction orthogonal to the reciprocating direction of the inner blade in relation to the movement, so if the beard lays along the skin surface, it will be maintained as it is and the beard of the outer blade will be introduced. There was a problem that the beard could not be smoothly introduced into the hole, and the efficiency of introducing the beard into the beard introduction hole was poor.

In order to solve the above problems, the present invention provides
By reciprocating the inner blade in an arc shape, a slight vibration is generated in the outer blade of the outer blade in a direction orthogonal to the reciprocating direction of the inner blade, causing a slight vibration in the outer blade. The beard is also raised to facilitate the introduction of the beard into the beard introduction hole of the outer blade, and by providing a pair of outer blade and inner blade of the outer blade body respectively, the reciprocating motion of this pair of inner blade bodies Related to this, a slight vibration is generated in the pair of outer blades of the outer blade body in the direction orthogonal to the reciprocating direction of the inner blade body, which repeats approaching and separating from each other, causing a sleeping beard to beard and whiskers of these outer blades. It is to provide a reciprocating electric razor that is easier to introduce into the introduction hole and has improved sharpness.

[0005]

According to a first aspect of the present invention, there is provided a main body containing a drive source, an outer blade body supported by the main body, and having an outer blade capable of displacing at least a part of a blade surface thereof. An inner blade body having an inner blade that is pressed against the inner surface of the outer blade of the outer blade body,
The inner blade body and the output shaft of the drive source are connected to each other, and the drive member reciprocates the output of the drive source to reciprocate the inner blade body. While being rotatably supported by the main body, one end is connected to the inner blade body and the other end is connected to the output shaft of the drive source via an eccentric cam, and the rotational output of the drive source is eccentric. By transmitting to the inner blade through a cam, the inner blade reciprocates in an arc around the shaft fulcrum, and at least part of the blade surface of the outer blade and the reciprocating direction of the inner blade. It is characterized in that it is slightly vibrated in a substantially orthogonal direction.

According to a second aspect of the present invention, there is provided a main body having a built-in drive source, and an outer blade body supported by the main body and having a pair of displaceable outer blades provided at least partially in parallel with each other. , A pair of inner blades each having an inner blade pressed against the inner surface of each outer blade of the outer blade and arranged in parallel with each other, and these inner blade and the output shaft of the drive source, respectively. A drive member that is connected and transmits the output of the drive source to reciprocate the pair of inner blades, wherein the drive member is formed in a substantially T shape and is rotatable about the intermediate position in the main body. Both ends of which are axially supported by the inner blade body and are opposed to each other about the shaft fulcrum, and an intermediate end of which is connected to the output shaft of the drive source via an eccentric cam. The output is transmitted to the pair of inner blades via an eccentric cam. A direction in which the pair of inner blades are reciprocally moved in opposite directions and in an arc shape about the shaft fulcrum, and at least a part of the blade surfaces of the pair of outer blades is substantially orthogonal to the reciprocating direction of the inner blades. It is characterized by a slight vibration.

[0007]

According to the reciprocating electric shaver of the present invention, the drive member is rotatably supported by the main body at its intermediate position, and one end is driven by the inner blade and the other end is driven. Is connected to the output shaft of the source through an eccentric cam, and the rotational output of the drive source is transmitted to the inner blade through this eccentric cam, and the inner blade reciprocates in an arc around the shaft fulcrum. In relation to the reciprocating motion of the inner blade body, by causing a slight vibration in the outer blade of the outer blade body in a direction orthogonal to the reciprocating direction of the inner blade body, the sleeping beard is also raised and the beard of the outer blade is removed. It can be easily introduced into the introduction hole.

According to the reciprocating electric shaver of the second aspect of the present invention, the drive member is formed in a substantially T shape, and is pivotally supported by the main body at an intermediate position between the drive member and the center thereof. The opposite ends are connected to the inner blade body, and the intermediate end is connected to the output shaft of the drive source via an eccentric cam, and the rotational output of the drive source is transmitted to the pair of inner blade bodies via the eccentric cam. The pair of inner blades are reciprocally moved in opposite directions to each other in an arc shape about the pivot point, and the inner blades are attached to the pair of outer blades of the outer blade in association with the reciprocating movement of the pair of inner blades. By causing slight vibrations that repeat approaching and separating from each other in the direction orthogonal to the reciprocating direction of the body, the sleeping whiskers can be raised and the whiskers can be more easily introduced into the beard introducing holes of these outer blades.

[0009]

Embodiments of the reciprocating electric shaver according to the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of a reciprocating electric shaver according to the present invention. Reference numeral 31 is a main body, which is composed of a case 31a and a case 31b which can be held together.
An outer cutter body A including a pair of elastically deformable outer cutters 32, 32 and an outer cutter case 33 accommodating the outer cutters 32, 32 is detachably attached to the. The outer blade body A can be detached from the main body 31 by releasing the engaging means by the operation button 34 provided on the side portion of the main body 31. A slide type power switch button 35 provided on one side of the main body 31 controls a motor 36 which is a drive source shown in FIG. 2 by operating a power switch (not shown).

2 and 3 are an exploded perspective view and a sectional view of the reciprocating electric shaver shown in FIG.

The motor 36 is sandwiched between the case 31a and the case 31b. The output shaft 37 of the motor 36 is provided with an eccentric shaft 38a at a position eccentric from the center of its upper surface, as shown in FIG.
8 is fixed. Further, the output shaft 37 of the motor 36
A cap 39 is fitted to one end on the side, and the cap 3
The bearing 40 integrated with the shaft 9 is provided with a shaft 41 whose lower end is press-fitted and supported.

Reference numeral 42 denotes a drive lever as a drive member. The drive lever 42 has a shaft hole 43 rotatably supported at the upper end of the shaft 41 at a substantially central position thereof, and the shaft hole 43. The intermediate arm 44a having an elongated hole 44 into which the eccentric shaft 38a is fitted at an eccentric position with the shaft fulcrum as the fulcrum, and the two shaft portions 45, 45 are provided in the shaft hole 4
3 and two side arms 45a, 45a, which are provided at positions eccentric to each other and are provided to face each other, and these three arms 44a, 45a, 45a form a substantially T-shape. There is. Next, the inner blade mount 47,
Regarding the mounting structure of the inner blade body B consisting of a large number of inner blades 46 arranged and supported on the inner blade mounting base 47 at equal intervals,
This will be described with reference to FIGS. 3 and 4. A pair of inner blades B, B
Pins 50a, 50a are attached to the inner blade mounting bases 47, 47 of FIG. On the other hand, the shaft portions 45, 45 of the drive lever 42
The inner blade support bases 49a, 49a elastically urged by the coil springs 48, 48 are vertically movable and urged upward by the pins 50b, 50b so as to be vertically guided and pulled out. It is stopped and attached. Locking grooves 49a, 49a for engaging and disengaging the pins 50a, 50a of the inner blades B, B are formed in the upper portions of the inner blade support bases 49, 49, respectively.
The inner blade bodies B, B are detachably attached to the drive lever 42 by engaging and disengaging the pins 50a, 50a with respect to the inner blade bodies.

Next, the outer blades 32, 32 of the outer blade body A are made of elastically deformable thin steel plates having a large number of beard introduction holes, and are curved into a semi-cylindrical shape so that the inner blade bodies B, B reciprocate. The outer blade mounting frame 51 is fixed to the outer blade mounting frame 51 in a deformable state in a direction orthogonal to the moving direction, and the outer blade mounting frame 51 is detachably mounted to the outer blade case 33.

Reference numeral 52 denotes a cover made of styrofoam, which has holes 52a and 52a for allowing the inner blade support bases 49 and 49 to freely move therein, and is attached to the upper portion of the main body 31. The lid 52 can prevent the beard from entering the inside of the main body 31. In addition, inside the main body 31, in addition to the motor 36, a battery 53 for supplying electric power to the motor 36 and a charging connector 54 are provided in the lower portion.

Next, the operation of the reciprocating electric shaver having the above construction will be described.

When the power switch button 35 is slid by a finger to close a power switch (not shown), electric power is supplied from the battery 53 to drive the motor 36 as a drive source, and the output shaft 37 of the motor 36 rotates. The eccentric cam 38 also rotates. The substantially T-shaped drive lever 42 rotatably mounted on the shaft 41 has a eccentric shaft 3 of the eccentric cam 38 in the elongated hole 44 of the intermediate arm 44a.
The eccentric rotation of 8a causes it to repeatedly move within a certain angle. As a result, the two side arms 4 of the drive lever 42 are
Shafts 45 and 45 provided on 5a and 45a, respectively,
Together with the inner blade mounts 47, 47, the arcuate reciprocating motion about the shaft 41 is repeated. By repeating this reciprocating operation, the pair of inner blades B, B attached to the inner blade mounts 47, 47 reciprocally slide on the inner surfaces of the pair of outer blades 32, 32 of the outer blade A in mutually opposite directions. Then, the shaving operation is performed.

The reciprocating motion of the pair of inner blades B, B will be described more specifically with reference to FIGS. 5, 6, 7 and 8.
5 and 6 are operation explanatory views in which the inner blades B, B reciprocate in an arc shape around the shaft fulcrum 41, and FIG. 5 shows a case where the pair of the inner blades B, B has the widest interval. As shown, the interval between the pair of shaft portions 45, 45 is indicated by X. FIG. 6 shows the case where the distance between the pair of inner blades B, B is the narrowest, and the distance between the pair of shaft portions 45, 45 is indicated by Y. Therefore, the inner blades B, B are separated by the distance X and the distance Y.
The inner blades B and B vibrate slightly in the direction orthogonal to the direction in which the inner blades B reciprocate due to the difference.

Next, FIGS. 7 and 8 are partial cross-sectional views showing the deflection of the outer blades 32, 32 of the outer blade A following the inner blades B, B, showing the movement of the inner blades B, B. Since the outer blades 32, 32 are deformed following the outer blades 32, the blade surfaces of the outer blades 32, 32 also vibrate slightly in a direction orthogonal to the direction in which the inner blades B, B reciprocate. Due to this slight vibration, the blade surfaces of the outer blades 32, 32 come close to or separate from each other in a direction orthogonal to the reciprocating direction of the inner blades B, B to shrink or stretch the skin surface. It will be repeated. FIG. 7 shows a case where the pair of outer blades 32, 32 are separated from each other to the outermost side and bent, and corresponds to the interval between the pair of inner blade bodies B, B shown in FIG. Is shown by the interval X. FIG. 8 shows a pair of outer blades 3.
2 and 32 show the time when they are closest to each other and bent toward the innermost side, which corresponds to the distance between the pair of inner blades B and B shown in FIG. .. Therefore, as described above, the outer blades 32, 32 slightly vibrate in the direction orthogonal to the reciprocating direction of the inner blade bodies B, B by the difference between the distance X and the distance Y, thereby shrinking the skin surface. It can be extended or stretched, and has the same effect as the beard introduction hole (not shown) of the outer blades 32, 32 being enlarged when shaving,
The whiskers are easily introduced into the beard introduction holes of the outer blades 32, 32.

A pair of outer blades are separated into two pieces, and two outer blade mounting frames are provided to fix these outer blades, respectively, and these outer blade mounting frames together with each outer blade inside the outer blade case. In order to be able to move in the direction orthogonal to the reciprocating direction of the blade,
It may be provided on the outer blade case. Also in this case, the pair of inner blades vibrate in directions opposite to each other in a direction orthogonal to the reciprocating direction of the inner blade, and the pair of inner blades also follow the microvibration of the inner blade in the same direction. It vibrates slightly.

[0021]

As described above, according to the present invention, the outer blade is slightly vibrated in the direction orthogonal to the reciprocating direction of the inner blade, and the fine vibration of the outer blade is used to raise the sleeping whiskers. To easily insert the beard into the beard introduction hole of the outer blade, and to slightly vibrate the pair of outer blades in the direction orthogonal to the reciprocating direction of the inner blade body to move these outer blades closer to or farther from each other. By doing so, the skin surface can be contracted or extended, and the beard can be more easily introduced into the beard introduction hole of the outer blade, and the sharpness can be improved.

[Brief description of drawings]

FIG. 1 is an external perspective view of a reciprocating electric shaver of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a cross-sectional view with an outer blade body removed.

FIG. 4 is a partial sectional view of the inner blade body and its mounting portion.

FIG. 5 is an operation explanatory view showing the movement of the inner blade body.

FIG. 6 is an explanatory diagram of the same operation.

FIG. 7 is a partial cross-sectional view showing the movement of the outer blade of the inner blade body and the outer blade body.

FIG. 8 is a partial sectional view of the same.

FIG. 9 is an exploded perspective view of a conventional reciprocating electric shaver.

FIG. 10 is an explanatory diagram of the same operation.

[Explanation of symbols]

 31 main body A outer blade body 32 outer blade 36 drive source (motor) 38 eccentric cam 42 drive lever (driving member) B inner blade body 46 inner blade 47 inner blade mounting base

Claims (2)

[Claims] 1. A main body having a built-in drive source, an outer cutter body supported by the main body and having an outer cutter capable of displacing at least a part of the blade surface, and pressed against the inner surface of the outer cutter of the outer cutter body. An inner blade body having an inner blade, and an inner blade body and an output shaft of the drive source which are connected to each other, and a drive member which transmits the output of the drive source to reciprocate the inner blade body. ,
The drive member is rotatably supported by the main body at an intermediate position thereof, and one end of the drive member is connected to the inner blade body and the other end is connected to an output shaft of the drive source via an eccentric cam. The rotation output of the drive source is transmitted to the inner blade body through the eccentric cam, and the inner blade body is reciprocally moved in an arc shape around the shaft fulcrum, and at least a part of the blade surface of the outer blade. A reciprocating electric shaver characterized by slightly vibrating the inner blade in a direction substantially orthogonal to the reciprocating direction of the inner blade. 2. A main body containing a drive source, an outer cutter body supported by the main body, and having a pair of displaceable outer cutters provided at least partially in parallel with each other, and the outer cutter body. A pair of inner blades each having an inner blade pressed against the inner surface of each outer blade and arranged in parallel to each other, and the inner blade body and the output shaft of the drive source are connected to each other, the drive source Of the driving member that reciprocates the pair of inner blades by transmitting the output of the driving member, the driving member is formed in a substantially T shape, and is rotatably supported by the main body at an intermediate position thereof. At the same time, both end portions facing each other around the shaft fulcrum are connected to the inner blade body, and the intermediate end portion is connected to the output shaft of the drive source via an eccentric cam, respectively. Is transmitted to the pair of inner blades via The blades are reciprocally moved in opposite directions and in an arc shape about the shaft fulcrum, and at least a part of the blade surfaces of the pair of outer blades are slightly vibrated in a direction substantially orthogonal to the reciprocating direction of the inner blades. A reciprocating electric razor characterized in that.