JPS6042729B2 - electric razor inner blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric razor inner cutter, and more particularly to an electric razor inner cutter having a cylindrical shape and a rotary structure.

Conventionally, in this type of electric razor, the inner blade body is pushed up by pushing up each of the inner cutting blades separately, or by pushing up the bearing part of the white blade body of a rotary electric razor. It was a composition.

In this case, the former requires a push-up spring for each inner cutter, and has the disadvantage that it takes time to assemble the inner cutter body. On the other hand, the latter has a complex structure and is prone to failure.
It also had the disadvantage of being expensive. SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide an electric razor inner cutter body that is easy to assemble, inexpensive, and simple in construction. Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an exploded perspective view of the inner cutter body according to the present invention. In the figure, 1 and 1' are semi-cylindrical inner cutter drums, and the outer peripheral surface of the inner cutter drum has long sides in the axial direction. Arranged 2
A substantially rectangular inner cutter blade protruding window a is formed, and a shaft piece 3' having a semicircular cross section is formed protruding on the axis of the inner cutter drum at the diametric center of each 114 cylindrical end portion 2. has been done. 4 or 4 '' is a semi-cylindrical inner blade body with a substantially arc-shaped cross section, and on its outer peripheral curved surface, a plurality of inner cutters/blades 5 are parallel to each other in the length direction of the inner blade body. They are arranged at equal intervals, and engagement steps for engaging with the window edge of the inner cutter drum are formed on both end surfaces of the inner cutter blade body. It is configured to engage with the edge a' of the protruding window a and not come out.

Push-up springs 6a and 6a' are fixed to the inner circumferential surface of the inner blade body 4 and arranged at intervals on the center line in the length direction of the inner circumferential surface of the inner cutter blade body, and the push-up springs 6a and 6a' The other end of the inner cutter blade body 4' is fitted into holes 7, 7 provided at corresponding positions on the inner peripheral surface of the inner cutter blade body 4'. In addition, the inner blade 4
Push-up springs 6b, 6b' are arranged and fixed at intervals on the lateral center line of the inner circumferential surface of the inner cutter blade body on the inner circumferential surface of the "", and the other ends of the push-up springs 6b, 6b' are fixed. are fitted into holes (not shown) provided at corresponding positions on the inner peripheral surface of the inner cutter blade body 4''.

Therefore, the inner blade body according to the present invention has two inner blade bodies 4 and 4.
"42 and 4"" form a pair and face each other,
The pair of inner cutter drums 1, 1'' is pushed up so that the inner cutter blade 5 provided on the outer periphery of the inner cutter blade body protrudes from the inner cutter blade protrusion window a of the inner cutter drums 1, 1''.
It is crowned with this.

FIG. 2 shows the assembled state of the inner cutter body of the present invention.

In Fig. 2, ± is the inner blade body, and the inner blade body 4 to 4
""" is housed in the inner cutter drums 1, 1", and the outer circumferential curved surface of each inner cutter blade body is pushed by a push-up spring and protrudes from the inner cutter blade protrusion window a of the inner cutter drums 1, 1". 8 is a cylindrical pin to prevent the inner blade from disassembling.
The pair of inner cutter drums 1 and 1'' are brought into contact with each other to form a cylindrical inner cutter body, and a cylindrical shaft portion 3 consisting of a shaft piece 3″ is formed at the end. The cylindrical inner blade body of the present invention is assembled by fitting and press-fitting the cylindrical pin 8 into the cylindrical pin 8 .

FIG. 3 shows a partial cross-sectional view of an electric razor incorporating an inner cutter body of the present invention, where 9 is an outer cutter, 10 is a motor, and 11 is a drive transmission for transmitting the rotational force of the motor 10 to the inner cutter body. Indicates bet.

The inner blade body ± is rotated by the motor 10 via this belt. According to the cylindrical inner cutter body of the present invention configured in this way, unlike the conventional inner cutter body, the inner cutter blade bodies 4 and 4'' and 4'' and 4'' are removed without pushing up the shaft of the inner cutter body. Push-up springs 6a, 6a'' and 6b respectively built in ``''
, 6b'', the inner cutter blade 5 is pressed against the outer cutter 9, and the inner cutter blade 5 can float and swing within the head of the outer cutter 9.The specific structure of the present invention is as described above. The present invention is not limited to the embodiments, and various modifications are possible.

For example, four inner blade protruding windows are formed on the circumference of one cylindrical drum, and two pairs of pressure springs 6a, 6a'' and 6b, 6b'' are inserted from the windows into the interior as shown in FIG. It is also possible to construct a similar cylindrical inner blade body by inserting the inner cutter blade bodies 4, 4'' and 4'', 4'''' in pairs. This shows another embodiment, and the same reference numerals are used in the drawings for parts common to those in FIGS. 1 and 2.

In this embodiment, the inner blade body 4, 4'', 4''
and 4""", respectively, are provided with protruding parts "d" that protrude in the axial direction at both ends thereof, so that the protruding parts are inward from the outer surface of the inner cutter blade body, and an engagement groove 12 is formed in the protruding parts "b". do. The direction of this groove is perpendicular to the joint surface of the two inner blade bodies, and the groove is provided so as to be in the diametrical direction of the inner blade body having an approximately S semicircular cross section. Furthermore, an annular coupling member 14,1
A cross-shaped locking piece 13 with a recess c provided in C and intersecting each other,
13''.The engaging grooves 12, 12'' of the pair of overlapping inner blade bodies 4, 4'' engage with the locking pieces 13, 13'' of the coupling members 14, 14''. The connecting members 14, 14'' are loosely fitted onto the end faces of the inner blade bodies 4, 4'' to constitute the inner blade body.As described above, according to the cylindrical inner blade body of the present invention, The structure is simple and there are fewer failures.
It also has the advantage that the inner blade body can be disassembled.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the inner blade body of the electric razor of the present invention, Fig. 2 is a completed assembled view of the inner blade body of the razor of the present invention, and Fig. 3
The figure is a partial sectional view of an electric razor incorporating the razor inner blade of the present invention, and FIG. 4 shows another embodiment of the razor inner blade of the present invention. ±・・・Inner blade body, 1,1″・・・Inner blade drum,
2... Inner blade drum end, 3''... Shaft piece,
3...Shaft part, 4,4'',4'',4''''''...
- Inner blade body, 5... Inner blade, 6a, 6a
″, 6b, 6b″... Push-up spring, 7...
・Hole, 8...Cylindrical pin, 9...Outer blade,
10...Motor, 11...-, Drive transmission belt, 12, 12''...Engagement groove, 13, 13''
...Locking piece, 14,145...Connection member.

Claims (1)

[Claims] 1. Four inner blade protruding windows are provided at approximately equal intervals on the outer peripheral surface of a substantially cylindrical inner blade drum, and from these four mutually opposing inner blade protruding windows, a plurality of inner blade blades are formed on the outer peripheral curved surface. The inner cutting surfaces of the inner blade bodies of a pair of inner blade bodies having a substantially arcuate cross section and a pair of inner blade bodies that are planted parallel to each other in the length direction are arranged between the inner circumferential surfaces of the inner blade bodies that face each other. An electric razor inner blade body is arranged so as to protrude to the outside via a push-up spring, and is brought into elastic contact with an inner peripheral surface of an outer blade.