JPH0220996Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an electric razor, and more particularly to an electric shaver that includes a grip unit held by the user's hand and a shaving unit rotatably supported on the upper part of the grip unit. It's about razors.

[Background of the idea]

Conventional electric razors had a structure in which the shaving unit was fixed to the head of the main body case, but in recent years, in order to change the image of electric razors, the electric shaver has been divided into a grip unit and a shaving unit. An electric shaver is being considered in which a shaving unit is rotatably provided on the upper part of a gripping unit, and the shaving unit is rotated when the electric shaver is used.

As this kind of electric shaver, conventionally,
A structure as described in Publication No. 1722 has been proposed.

An electric shaver with this structure includes a gripping unit,
and a shaving unit rotatably supported on the top thereof. When the electric shaver is not in use, the shaving surface of the shaving unit faces downwards, ie towards the inside of the gripping unit.

When using an electric razor, rotate the shaving unit at least 90 degrees (90 degrees, 180 degrees or 90 degrees).
By rotating (an angle between 180 degrees and 180 degrees)
It is designed to be used with the shaving surface protruding from the gripping unit.

However, this electric shaver has the following drawbacks. That is, when the shaving unit is in the stored state, the shaving surface faces downward, so the hair debris accumulated inside the shaving unit falls into the gripping unit from the hair introduction hole formed on the shaving surface and adheres to the shaving unit. It makes the area around it dirty and is unhygienic.

When using an electric razor, the shaving unit must be rotated 90 degrees or more for the shaving surface to protrude, making operation difficult.

When electrically connecting the battery housed in the gripping unit to the motor built into the shaving unit, it is virtually impossible to connect using lead wires because the rotation angle of the shaving unit is large as mentioned above. However, the connection structure is limited to, for example, one using an elastic metal member in the rotating part of the shaving unit, and there is no margin for design.

The center of rotation of the shaving unit is approximately at the center of the side of the shaving unit. For this reason, the amount of wraparound toward the gripping unit side is large, and therefore a large amount of space is required, which poses an obstacle when downsizing the electric shaver.

If the rotation center of the shaving unit is in the center, when the shaving unit is rotated at an angle between 90 degrees and 180 degrees (obtuse angle), the upper corner of the shaving unit opposite the shaving surface will protrude from the rear surface of the gripping unit. There are things to do. The presence of such a protruding portion has the drawback that when the gripping unit is held in the hand, the protruding portion hits the belly of the hand, resulting in an uncomfortable feeling and poor usability.

[Purpose of invention]

The present invention is directed to an electric shaver having this type of configuration, and aims to provide an electric shaver that is compact and easy to use.

[Summary of the idea]

In order to achieve this object, the present invention supports a shaving unit above the grip unit so as to be rotatable at a predetermined angle, and the shaving unit has a shaving surface facing the front in the stored position, and a shaving unit that can be used for shaving in the stored state. The shaving unit is arranged so that its surface is substantially the same as or inward from the front surface of the gripping unit, and the center of rotation of the shaving unit is near the rear surface of the shaving unit opposite to the shaving surface of the gripping unit. It is provided near the upper peripheral surface on the side opposite to the front surface, and is configured so that the shaving surface protrudes from the front surface of the gripping unit by rotating the shaving unit diagonally upward at an acute angle from the storage position. It is characterized by this.

FIG. 1 is a diagram showing the relationship between the center of rotation of the shaving unit and the locus of rotation of the shaving unit in this type of electric shaver.

The electric shaver is composed of a grip unit 1 which is held by a user in his/her hand, and a shaving unit 2 which is rotatably disposed inside the upper part of the grip unit 1. The specific structure of units 1 and 2 will be explained later. FIG. 1 shows the shaving unit 2 in the storage position, and when using the electric razor, the shaving unit 2 must be rotated so that its shaving surface 4 protrudes from the front of the grip case 1. No. Curves A and B in the figure are lines showing the locus of rotation of a certain portion of the shaving unit 2 when the rotation center O of the shaving unit 2 is varied.

In other words, curve A is a line showing the rotation locus of the lower rear end 3 of the shaving unit 2, and curve _A1 is the rotation center.
O ₁ , curve A ₂ is the rotation center O ₂ , curve A ₃ is the rotation center
O ₃ , curve A ₄ is the rotation center O ₄ , curve A ₅ is the rotation center
O ₅ , curve A ₆ is the center of rotation O ₆ , curve A ₇ is the center of rotation O ₇
In addition, the curve A ₈ partially shows the rotation locus when the rotation center is O ₈ .

As is clear from this figure, the rotation centers O ₁ , O ₃ , O ₅ , O ₇ are located at the front part (on the shaving surface 4 side) from approximately the center of the shaving unit 2, and the lower half is located at the rear part from the center of the shaving unit 2. When the rotation center O ₂ is at the position (on the gripping unit 1 side), the rotation locus of the rear lower end 3 of the shaving unit 2 is a curved line.
As shown in A ₁ , A ₅ , A ₃ , A ₇ , and A ₂ , the length of rotation toward the gripping unit 1 side is large. This large amount of turning of the shaving unit 2 means that
As a result, a space is required for this purpose, and the gripping unit 1 becomes large, and the storage space for other articles in the gripping case 1 becomes narrow, which is not preferable.
Therefore, from the rotation locus of the rear lower end 3, the rotation centers of the shaving unit 2 are O ₄ , O ₆ and O ₈ ,
It is desirable that it be located at the rear of the shaving unit 2 on the side opposite to the shaving surface 4 and in the upper half of the side opposite to the gripping unit 1.

In Fig. 1, curve B is a line showing the rotation locus of the center point of shaving surface 4 in shaving unit 2, curve _B3 is the rotation center _O3 , and curve _B4 is the rotation center.
O ₄ , curve B ₆ is the center of rotation O ₅ , curve B ₇ is the center of rotation O ₇
In addition, curve B ₈ partially shows the rotation locus when the rotation center is O ₈ .

As is clear from this figure, the rotation centers O ₃ and O ⁴
In the case of , the center point of the shaving surface 4 retreats from the front surface 5 of the gripping unit 1 as the shaving unit 2 rotates, and in the case of the rotation center O ₆ , the center point of the shaving surface 4
The center point of the grip unit 1 protrudes from the front surface 5 of the gripping unit 1, but the protrusion dimension is short. Like this, shave side 4
If the electric shaver is set back or protrudes less than the gripping unit 1, the gripping unit 1 will get in the way when using the electric shaver, making it difficult to use.

In the case of this point rotation center O ₇ and O ₈ , the shaved surface 4
Although the amount of protrusion is large, the center of rotation _B7 is not preferable because the amount of rotation of the rear lower end 3 of the shaving unit 2 is large as described above. Therefore, if the rotation center is provided near the rear surface of the shaving unit 2 on the opposite side to the shaving surface 4 and near the upper ridgeline on the opposite side of the gripping unit 1, like the rotation center _O8 ,
The electric shaver can be miniaturized, and the shaving unit 2 fully protrudes from the front surface 5 of the gripping unit 1 during use, making the electric shaver easy to use.

[Example of idea]

Next, embodiments of the present invention will be described with reference to the drawings. Figures 2 to 4 are diagrams for explaining the first embodiment, with Figure 2 showing the shaving unit 2 in a stored state, and Figure 3 showing the shaving unit 2 in a rotated state to the use position. 4 are enlarged sectional views showing the shaft support structure of the shaving unit 2 in this electric shaver.

The gripping unit 1 is comprised of a case body 6 made of synthetic resin and a battery 8 housed in a power supply housing 7 provided at the bottom of the case body 6. The upper front surface of the case body 6 is cut out, and support parts 9 are provided protruding from both sides of the upper rear side.

The shaving unit 2 includes a motor casing 10 containing a motor (not shown) and a switch 11.
The shaving blade body 12 includes an inner cutter, an outer cutter, and the like. This shaving unit 2 is arranged inside the upper part of the gripping unit 1 and is rotatably supported by a support shaft 13. The support shaft 13 is connected near the rear surface of the shaving unit 2 and near the upper ridgeline, and the axis of the support shaft 13 is the center of rotation of the shaving unit 2.

In order to supply power to the motor from the battery 8, the structure of the end of the support shaft 13 is as shown in FIG. That is, a cylindrical body 14 is provided in the support part 9 of the case body 6, and two conductive pieces 15 are fixed to the inner periphery of the cylindrical body 14 at a predetermined interval in the circumferential direction. Two recesses 6 are formed in the surface. The end of the support shaft 13 is inserted into this cylindrical body 14, and two conductive contact pieces 17 are attached to the outer periphery of the end, each of which comes into elastic contact with the conductive piece 15.
Further, a convex portion 18 that fits into one of the concave portions 16 is provided. The conductive piece 15 is connected to the battery 8 via a lead wire 19, and the contact piece 17 is connected to the motor via a lead wire 20.

When the shaving unit 2 is in the storage position as shown in FIG. 2, the shaving surface 4 faces the front, and its central protrusion is flush with the front surface of the gripping unit 1 or slightly set back. . This design not only makes the electric shaver more compact, but also helps protect the shaving blade 12. Further, when the shaving unit 2 is in the storage position, the protrusion 18 is fitted into one of the recesses 16 and positioned, as shown in FIG. 4, to prevent the shaving unit 2 from wobbling.

When using the electric shaver, rotate the shaving unit 2 at an acute angle relative to the grip unit 1 so that the convex portion 18 of the support shaft 13 is aligned with the other concave portion 16.
to be inserted into. As a result, as shown in Figure 3,
The shaving surface 4 of the shaving unit 2 protrudes from the front surface 5 of the gripping unit 1 by a predetermined distance l and is kept in this state for use. After using the electric shaver, the shaving unit 2 is returned to the state shown in FIG. 2 again.

5 and 6 are diagrams for explaining the second embodiment of the present invention, and FIG. 5 shows the shaving unit 2.
FIG. 6 shows the shaving unit 2 in its stored state, and the state in which the shaving unit 2 has been rotated to the use position.

The main difference between this embodiment and the first embodiment is that the front surface 5 of the case body 6 is curved in the vertical direction, and the lid 21 is slidably attached.

As shown in FIG. 5, when the shaving unit 2 is stored in the upper part of the gripping unit 1, the lid 21 is in the upper position and covers the shaving surface 4. When using the electric razor, lower the lid 21 along the front surface 5 of the case body 6 to the lower position as shown in FIG. It is made to protrude from the front surface 5 of.

Figures 7 to 9 are diagrams for explaining the third embodiment of the present invention. Figures 7 and 8 show the shaving unit 2 in the stored state, and Figure 9 shows the shaving unit 2 in the use position. Each figure shows a rotated state.

The main differences between this embodiment and the first embodiment are that the through hole 22 into which the support shaft 13 of the support portion 9 is inserted is an arc-shaped elongated hole, and the cross-sectional shape of the support shaft 13 is is a point that is almost rectangular.

As shown in FIG. 7, when the shaving unit 2 is in the stored state, the end of the support shaft 13 is located at the rear end of the through hole 22. As shown in FIG. When using the electric shaver, the shaving unit 2 is pushed out from the rear surface and rotated along the through hole 22. Point O in FIGS. 7 and 9 indicates the center of rotation of the shaving unit 2. In FIGS. The shaving unit 2 can further protrude the shaving surface 4 by rotating itself and moving the support shaft 13 from the rear end of the through hole 22 to the front end.

[Effect of idea]

The present invention has the above-mentioned configuration, and includes a gripping unit and a shaving unit rotatably supported on the upper part of the gripping unit, and the shaving unit is configured such that the shaving surface faces the front when it is stored. Because of this, the hair debris accumulated in the shaving unit does not fall into the gripping unit and stain the area around it, unlike previously proposed devices, and hygiene can be maintained.

Furthermore, when using an electric razor, if the shaver is turned at an acute angle of, for example, 45 degrees from a horizontal position, the shaving surface will immediately protrude. Therefore, since only a small amount of rotation is required, the operation is simple and user-friendly.

Furthermore, since the rotation angle is small, it is easy to connect the gripping unit and the shaving unit.
In addition to using the metal elastic piece as in the embodiment, it is also possible to use a lead wire, which provides flexibility in design.

Furthermore, by specifying the rotation center of the shaving unit as in the present invention, the space on the gripping unit side can be made as small as possible.
Electric shavers can be made smaller.

Furthermore, by specifying the center of rotation of the shaving unit as in the present invention, when the shaving unit is rotated, the lower corner of the support in the shaving unit moves to the inside of the gripping unit. The corners do not protrude like the ones that were painted. Therefore, the corners do not come into contact with the belly of the hand, and the user does not feel uncomfortable when using the device.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the relationship between the rotation center of the shaving unit and the rotation locus of a certain part of the shaving unit, and Fig. 2 shows the shaving unit of the electric shaver according to the first embodiment of the present invention in the stored state. A side view, Fig. 3 is a side view of the electric shaver with the shaving unit rotated to the operating position, Fig. 4 is an enlarged sectional view of the shaft structure of the electric shaver, and Fig. 5 is the second implementation. FIG. 6 is a side view of the shaving unit of the electric shaver in the stored state, FIG. 6 is a perspective view of the shaving unit of the electric shaver rotated to the use position, and FIGS. 7 and 8 are the third embodiment. A side view and a rear view of the shaving unit of the electric shaver according to the example in a stored state;
FIG. 9 is a side view of the electric shaver with the shaving unit rotated to the use position. 1...Gripping unit, 2...Shaving unit, 4...Shaving surface, 5...Front surface of gripping case, O...Rotation center of shaving unit.

Claims (1)

[Claims for Utility Model Registration] A shaving unit is supported on the upper side of the grip unit so as to be rotatable at a predetermined angle, and the shaving unit is in a storage position with its shaving surface facing the front.
And in the stored state, the shaving surface is located on the same level as the front surface of the gripping unit or inward from it, and the center of rotation of the shaving unit is located on the rear surface of the shaving unit opposite to the shaving surface. The shaving surface protrudes from the front surface of the grip unit when the shaving unit is rotated obliquely upward from the storage position to form an acute angle. An electric razor configured to: