JPH07299263A - Rotation type electric razor - Google Patents

Abstract

PURPOSE:To provide an internal blade easy-to-assemble in the rotation type electric razor. CONSTITUTION:An inner blade stand 1 consists of an inner blade stand 2 provided with a through hole 4 to which a base part 7a of an inner blade 7 is inserted and a fitting hole 5 for fitting a spring 6, the spring 6 fitted to the fitting hole 5 at one end and located across the through hole 4 at the other end, and the inner blade 7 formed with an elastic engagement part 7g having a guide port 7e on the end part 7c of the base part 7a to be inserted to the through hole 4. The spring 6 is fitted to the inner blade stand 2, then the base part 7a of the inner blade 7 is inserted to the through hole 4, and the spring 6 is engaged with the elastic engagement part 7g to easily assemble the inner blade 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric shaver, and more particularly to a structure for mounting an inner blade on an inner blade thereof.

[0002]

2. Description of the Related Art A conventional rotary electric shaver of this kind is shown in FIG.
The structure is as shown in. That is, in FIG. 4, reference numeral 100 denotes a main body of the electric razor, and an inner blade body storage chamber 101 whose one end, that is, an upper end side in FIG. 4, is formed in the main body 100, and the inner blade body storage chamber 101 has an opening. An outer blade body 102 having a large number of beard introducing holes formed by closing the opening is detachably attached.

Further, the motor 1 is installed inside the main body 100.
04 and a battery 105 for supplying electric power to the motor 104. The output shaft of the motor 104, that is, the rotary shaft 106 is the bottom wall 1 of the inner blade housing chamber 101.
It penetrates through 07 and projects into the inner blade housing chamber 101,
An inner blade 108 is detachably attached to the rotating shaft 106. The inner blade body 108 is attached to the inner blade base 109 and the inner blade base 109 so as to be movable in the direction along the rotation center axis of the inner blade base 109, that is, in the vertical direction in FIG. And a plurality of inner blades 110 formed. A switch 103 is provided on the main body 100.

In use, the switch 10
When 3 is put in, the motor 104 rotates, which causes the inner blade body 108 attached to the rotary shaft 106 to rotate, and the inner blade 11
0 rotates while being pressed against the inner surface of the outer blade body 102, whereby the beard that has entered through the beard introduction hole of the outer blade body 102 is sheared and the beard is shaved.

The structure of the conventional inner blade body 108 is shown in FIG. That is, the inner blade base 109
Is located around the rotation center axis, that is, around the shaft hole 109a, and has a plurality of through holes 109b and spring mounting holes 109.
c is formed (only one is shown in FIG. 5). The inner blade 111 includes a base portion 111a slidably inserted into the through hole 109b and a blade portion 111b integrally formed at one end portion of the base portion 111a, that is, a rear end portion in the insertion direction into the through hole 109b. In addition, a spring insertion hole 111 is provided on the tip end side in the insertion direction of the base 111a.
c is provided.

Reference numeral 112 denotes a spring, and one end of the spring 112 is formed with a mounting portion 112a for being inserted into the spring mounting hole 109c and fixed to the inner blade base 109, and the other end is inserted into the spring insertion hole 111c. It is an engaging portion 112b that engages with the lever insertion port 111c.

The inner blade 108 is assembled as follows. First, the inner blade 111 is moved in the direction of the arrow a from the position indicated by the phantom line to insert the base portion 111a into the through hole 109b of the inner blade base 109, and then the spring 11
2 from the position indicated by the phantom line in the direction of arrow b, and the engaging portion 112b is inserted from the tip thereof into the spring insertion hole 111c of the base portion 111a and engaged therewith, and then the attaching portion 112a.
Is moved in the direction of arrow c from the position indicated by the phantom line, and is inserted and fixed in the spring mounting hole 109c of the inner blade base 109 to fix the inner blade base 1
The spring 112 is attached to 09 to complete the assembly.

[0008]

Since the conventional inner blade body 108 has the structure as described above, when assembling this, the base portion 111a of the inner blade 111 is inserted into the through hole 109b of the inner blade base 109. Then, after inserting the engagement portion 112b of the spring 112 into the spring insertion hole 111c of the base portion 111a,
The attachment portion 112a had to be inserted and fixed in the spring attachment hole 109c of the inner blade base 109. Since the spring insertion hole 111c is extremely small and the spring itself is small, the engagement portion 112b of the spring 112 is inserted into the spring insertion hole 111c while the base portion 111a is inserted into the through hole 109b.
It was difficult to insert, there was a problem in workability, productivity was poor, and as a result it was a factor of high cost.

[0009]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art, and has a main body having an inner blade body storage chamber having one end opened, and an outer blade body attached to the main body to cover the opening. A rotary electric shaver comprising a motor provided in the main body, the output shaft of which protrudes from the bottom of the inner blade housing chamber, and an inner blade detachably attached to the output shaft of the motor. An inner blade body, a plurality of through holes penetrating along the output axis direction located around the rotation center axis thereof, and an inner blade base having an elastic body mounting portion located in the vicinity of the through hole, A base portion slidably inserted into the through hole and a blade portion slidably contacting the inner surface of the outer blade body at the rear end in the insertion direction of the base portion are provided, and the end edge in the insertion direction is cut out as an introduction port. The locking part formed continuously at the inlet And inner cutter in which a resilient member engaging portion which,
An attachment portion attached to the elastic body attachment portion is formed at one end, and an engagement portion that is located across the through hole at the other end and is introduced from the introduction port and engages with the elastic body engagement portion is formed. It is composed of an elastic body.

[0010]

Since the present invention is configured as described above, when assembling the inner blade body, the elastic body is attached to the elastic body attachment portion of the inner blade base, and the engaging portion at the other end is provided with the through hole. After crossing and positioning, insert the base of the inner blade into the through hole, and then introduce the engaging portion of the elastic body from the introduction port of the elastic body engaging portion to engage with the locking portion to form the inner blade body. Therefore, it is possible to assemble, and therefore it is possible to solve the problem that the workability is poor because it is not necessary to insert the tip of the spring into the hole provided in the base of the inner blade as in the conventional case.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to FIGS. The entire configuration of the rotary electric shaver according to the present invention is the same as that shown in FIG. 4 except for the configuration of the inner blade, and therefore, when each configuration other than the inner blade needs to be explained, Description will be given using the same reference numerals as those shown in FIG.

Here, for easy understanding, each drawing will be briefly described. First, FIG. 1 (A) is a front view of the inner blade body 1, that is, a view seen from the outer blade body side, and FIG. 1 (B) is a sectional view taken along line XX of FIG. 1 (A). ) Is the inner blade 1
FIG. 1 (D) is a view of the back side of FIG.
It is the figure which crossed in Y.

2 (A) and 2 (B) are shown in FIG.
FIG. 1A is a cross-sectional view taken along line X-X and FIG.
It is the figure which crossed in Y, Comprising: It is explanatory drawing which shows the assembly procedure of an inner blade.

In the drawing, reference numeral 2 denotes an inner blade base, and a shaft hole 3 is formed in the inner blade base 2, and the motor 104 is formed by the shaft hole 3.
It is detachably attached to a rotary shaft 106 serving as an output shaft of, and is rotated in the inner blade housing chamber 101 as the rotary shaft 106 rotates. Further, the inner blade base 2 is formed with a plurality of through holes 4 (three in FIG. 3) formed along the axial direction around the shaft hole 3, and the through holes 4 are formed on the back surface side thereof. A spring mounting hole 5 as an elastic body mounting portion is formed in the vicinity of each of the above. The mounting hole 5 is a hole having corner portions 5a facing each other in the direction orthogonal to the longitudinal direction of the through hole 4.

Next, 6 is a spring as an elastic body, and this spring 6 is formed in a substantially L shape, one end of which is a substantially inverted U shape, and the other end is an engaging portion 6b. There is. The mounting portion 6a is inserted into the spring mounting hole 5 in a compressed state, and is elastically mounted on the opposite corners 5a of the mounting hole 5 by the elastic force of the mounting portion 6a. The joining portion 6b crosses the through hole 4 and its tip contacts the back surface of the inner blade base 2, that is, as shown in FIG.
In (D), it is elastically biased upward and is positioned so as to be opposed to, ie, on the same line as, a locking portion 7f of an elastic body engaging portion 7g of the inner blade 7 described later.

Next, the inner blade 7 comprises a base portion 7a slidably inserted into the through hole 4 and a blade portion 7b formed at a rear end portion of the base portion 7a in the insertion direction into the through hole 4. In addition, at the end portion 7c on the tip end side in the insertion direction of the base portion 7a into the through hole, an introduction port 7e is formed by cutting out a lower end edge 7d as an end edge, and an inner blade base 2 continuous with this introduction port 7e. There is provided an elastic body engaging portion 7g formed by punching out in an L-shape, which is bent toward the outer peripheral direction and has a locking portion 7f whose end is a closed portion. In addition, the engaging portion 6 of the spring 6 is provided at the introduction port 7e.
A guide portion 7h is formed to widen toward an edge 7d that guides b.

When the engaging portion 6b of the spring 6 is engaged with the elastic body engaging portion 7g of the inner blade 7 inserted into the through hole 4 of the inner blade base 2, the inner blade 7 is moved upward. The outer blade body 102 is elastically biased. In addition, since the stress of beard shearing is applied during actual shaving, the inner blade 7
Moves up and down in the through hole 4, but the elastic body engaging portion 7g
Is formed in an L-shape, the engaging portion of the spring 6 does not separate from the elastic body engaging portion 7g.

Next, the procedure for assembling the inner blade 1 will be described with reference to FIGS. 2 (A) and 2 (B). First,
The spring 6 is attached to the inner blade base 2 by inserting the attachment portion 6a of the spring 6 into the spring attachment hole 5 of the inner blade base 2 from the position indicated by an imaginary line in the direction of the arrow a. At this time, the engaging portion 6 b of the spring 6 is located across the through hole 4. Then, the inner blade 7 is inserted into the through hole 4 from above, that is, in the direction of the arrow b. At this time, the engaging portion 6b of the spring 6 is located in the vicinity of the introduction port 7e of the elastic body engaging portion 7g of the inner blade 2, so that the engaging portion 6b is moved by the elastic force of the spring 6 to the introduction port 7e. The inner blade 7 is attached to the inner blade base 2 by being guided by the guide portion 7h formed in the above, and automatically moving upward, that is, moving toward the locking portion 7f and engaging with the locking portion 7f. Therefore, the assembly of the inner blade body 1 can be completed simply by inserting the inner blade 7 into the through hole 4 after attaching the spring 6 to the inner blade base 2.
It is possible to solve the above-described problem of poor workability in assembly.

The guide portion 7h does not necessarily have to be provided. This is because when the spring 6 is attached to the inner blade base, the engaging portion 6b is located in the vicinity of the introduction port 7e, so that the engaging portion 6b is guided to the introduction port 7e as described above. This is because the engaging portion 6b automatically engages with the locking portion 7f.

Further, in the above embodiment, since the elastic body engaging portion 7g is bent in the outer peripheral direction of the inner blade base 2 and is formed into an L-shape having the locking portion 7f whose end is the closing portion, the inner blade is formed. When the body 1 rotates, a centrifugal force is applied to the engaging portion 6b of the spring 6 in the direction of the engaging portion 7f, so that the engaging portion 6b is actually used.
Does not disengage from the elastic body engaging portion 7g.

Furthermore, the mounting hole 5 is a hole having a corner portion 5a in a direction orthogonal to the longitudinal direction of the through hole 4, and the mounting portion 6a of the spring 6 is inserted into the corner portion 5a. The spring 6 can be securely attached to the inner blade base, and once attached, the spring 6 does not easily come off, and there is no fear of coming off even when the inner blade 7 is attached.
Further, the shape of the elastic body engaging portion 7g is not limited to the above-mentioned embodiment, but the side edge portion of the base portion 7a of the inner blade 2 is formed as shown in FIG.
It is also possible to punch the base portion 7a into the shapes as shown in (A), (B), and (C) to form the introduction port 7e and the locking portion 7f, respectively. In this case, it is desirable that the locking portion 7f be the central portion of the inner blade 7 because the inner blade 7 can be evenly elasticized.

[0022]

Since the present invention is constructed as described above, the elastic body and the inner blade can be easily attached to the inner blade base, that is, the elastic body is attached to the inner blade base and then the inner blade is attached. It is possible to assemble the inner blade body, eliminate the poor workability resulting from the work of inserting the tip of the spring into the spring insertion hole of the inner blade after attaching the inner blade to the inner blade base as in the past, and extremely It is possible to provide an inner blade with good assembly workability.

[Brief description of drawings]

FIG. 1 is a view showing an inner blade body of a rotary electric shaver of the present invention, (A) is a front view of the inner blade body, (B) is a cross-sectional view taken along line XX of the front face of the inner blade body, (C). 8D is a back view of the inner blade, and FIG. 8D is a cross-sectional view of the front of the inner blade taken along line YY.

2 (A) and 2 (B) are views showing the procedure for assembling the inner blade of the present invention.

FIG. 3 is a view showing another embodiment of the elastic body engaging portion of the inner blade of the present invention.

FIG. 4 is a view showing a conventional rotary electric shaver with a part cut away.

FIG. 5 is a diagram showing a procedure for assembling an inner blade of a conventional rotary electric shaver.

[Explanation of symbols]

 1 Inner Blade 2 Inner Blade 4 Through Hole 5 Elastic Body Attachment 6 Spring (Elastic Body) 6a Spring 6 Attachment 6b Engagement of Spring 6 Inner Blade 7a Inner Blade Base 7b Blade 7e Inlet 7f Engagement part 7g Elastic body engagement part

Claims (1)

[Claims] 1. A main body having an inner blade body storage chamber having one end opened, and an outer blade body attached to the main body so as to cover the opening.
A rotary electric shaver comprising a motor provided in the main body, the output shaft of which protrudes from the bottom of the inner blade housing chamber, and an inner blade detachably attached to the output shaft of the motor, An inner blade body, a plurality of through holes penetrating along the output axis direction located around the rotation center axis thereof, and an inner blade base having an elastic body mounting portion located in the vicinity of the through hole, A base portion slidably inserted into the through hole and a blade portion slidingly contacting the inner surface of the outer blade body at the rear end in the insertion direction of the base portion are provided, and the end edge in the insertion direction is cut out to serve as an introduction port. An inner blade provided with an elastic body engaging portion having a locking portion formed continuously with the introduction port, and an attaching portion attached to the elastic body attaching portion at one end and the other end across the through hole. Position and is introduced from the introduction port and engaged with the elastic body engaging portion Electric rotary shaver, characterized in that consisted to form a Rukakarigo portion and an elastic body.