JP3112303B2 - Hair cutter blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a comb-shaped blade comprising a comb-shaped fixed blade and a movable blade used for a hair cutter.

[0002]

2. Description of the Related Art A hair cutter blade composed of a comb-shaped fixed blade and a movable blade requires a spring member for pressing the movable blade against the fixed blade, and is generally called a push-up spring. A spring member is used separately. As one type of hair cutter, there is an electric hair clipper used for shaving during surgery. In this case, since the blade must be disposable, the necessity of a separate spring member poses many problems in terms of cost including assemblability.

On the other hand, Japanese Utility Model Publication No. 59-27258 and Japanese Utility Model Publication No. 59-27899 disclose that a movable blade is formed of a steel plate having a spring property, and a portion from an elastic joint portion formed near the blade edge portion to the blade edge is formed. By providing a state in which the movable blade is elastically bent, the movable blade itself is provided with a spring property for bringing the movable blade into close contact with the fixed blade, thereby eliminating the need for a separate spring member.

[0004]

However, according to the above structure, since the blade is assembled in a bent state, the blade surface polishing accuracy and the position accuracy of the elastic joint portion affect the close contact accuracy between the fixed blade and the movable blade. Influence is large and it is practically difficult to obtain good adhesion accuracy. The present invention has been made in view of such a point, and an object of the present invention is to provide a hair cutter that can secure good sharpness in addition to cost reduction and improvement in assemblability by reducing the number of parts. To provide a blade.

[0005]

According to the present invention, there is provided a blade comprising a comb-shaped fixed blade and a movable blade, wherein the movable blade is integrally provided with a spring piece for pressing itself against the fixed blade. The spring piece has the action point at one end on the edge side of the movable blade and the other end
Is formed in a C-shape having the fulcrum of
A slide guide groove is formed to guide the reciprocating movement of the blade.
The inside of the C-shape of the spring piece at the position between the point of use and the fulcrum
And is provided on the movable blade . According to the present invention, the spring force of the spring piece presses the blade edge side of the movable blade more strongly against the fixed blade side than the opposite side, and the close contact accuracy between the movable blade and the fixed blade increases.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the illustrated embodiment. The illustrated example shows a blade for a surgical hair clipper. First, the hair clipper will be described with reference to FIGS. As shown in FIG.
And a head 1 provided at one end of the grip 11
2, the head portion 12 of the clipper body 1
The blade block 2 is formed as a detachable one.

The outer shell of the clipper body 1 is formed by a housing 10 forming the entire grip portion 11 and a part of the head portion 12, and a mounting frame 13 forming the rest of the head portion 12. The rechargeable battery 5 and the motor 6 are built-in via a mounting base 14 in a grip portion 11 of a housing 10 whose end face opening on the side 12 is closed by a lid 15. A switch handle 50 is provided.

An eccentric shaft 61 having a balance weight is attached to an output shaft of the motor 6, and a driver 7 for converting eccentric rotational motion into reciprocating motion is engaged with the eccentric shaft 61. The driver 7 here is
The mounting frame 13 passes through an opening formed in the lid 15.
It protrudes into. In the drawing, reference numeral 16 denotes a waterproof ring disposed in the opening, and 17 denotes an opening / closing hook which allows the mounting frame 13 to be freely opened and closed with respect to the housing 10.

The blade block 2 is detachably attached to an opening formed in the end surface of the mounting frame 13, and includes a fixed blade 21, a movable blade 22, a blade base 20, and a cover 23. And is formed from The blade base 20, which is a synthetic resin molded product, has a fixed blade 2 on its inner surface.
1 and a plurality of bosses 24 for positioning the movable blade 22. The movable blade 22 having a comb-shaped tip is slidably disposed on the inner surface side, and the tip is also a comb. The toothed fixed blade 21 is attached to the movable blade 22 so as to overlap with the movable blade 22 while being positioned by the boss 24. The fixed blade 21 is fixed by fitting the cover 23 to the fitting boss 28 of the blade base 20 and heat-sealing the cover 23. Reference numeral 29 in FIG. 1 is a clip piece that engages with the mounting frame 13.

The outer surface of the blade base 20 of the blade block 2 functions as a guide surface 25 to be attached to the skin when shaving with the hair clipper. The blade 22 is attached to the blade base 20 so as to intersect with the blade base 20 when mounted on the blade base 20.
5 is extended, and the cutting edge of the fixed blade 21 is a skin contact portion 26 which is bent so as to form a surface substantially flush with the guide surface 25.

The movable blade 22 is connected to the driver 7
The reciprocating drive by the motor 6 is performed by engaging the tip of the vibrating rod 70 protruding from the blade base 2.
When the shaving is performed by moving the guide surface 25 of the “0” while touching the skin, the movable blade 22 is provided between the fixed blade 21 and the guide surface 25 and is positioned closer to the skin than the fixed blade 21. In addition, the cutting edges of the fixed blade 21 and the movable blade 22
Since it is located at a position substantially flush with 5, it is possible to easily and reliably shave the hair short.

A spring member for bringing the movable blade 22 into close contact with the fixed blade 21 is integrally formed on both sides of a driver fitting hole 22b formed by burring at the center of the movable blade 22. It is formed as a spring piece 27,27. These spring pieces 27 formed by cutting and raising from the movable blade 22 are formed such that an action point 27a that comes into contact with the back surface of the blade base 20 is on the blade tip side of the movable blade 22 and a fulcrum 27b is on the opposite side. And the fulcrum 27b and the action point 2
7a is formed to have a C-shape so as to increase the distance between the two. The blade side of the movable blade 22 is fixed to the fixed blade 21.
The fulcrum 27b and the action point 27a are set so that the force pressing against the cutting edge becomes larger, and by increasing the distance between the fulcrum 27b and the action point 27a,
This makes it easy to set the pressing force. Here, a slide guide groove 22a that engages with the boss 24 of the blade base 20 and a contact portion of the driver fitting hole 22b with the driver 7 are located between the fulcrum 27b and the application point 27a. For this reason, also in this respect, an appropriate spring force can be obtained, and the movable blade 22 can be prevented from being twisted at the time of driving, and a stable sharpness can be obtained.

The large-diameter portion of the driver fitting hole 22b has a drive rod 70 of the driver 7 when the blade block 2 is attached and detached.
And the driver fitting hole 22b are provided so as to be smoothly fitted. The driver fitting hole 22b is formed by burring processing because the rigidity of the movable blade 22 and the driver This is for improving the wear resistance of the sample No. 7.

[0014]

As described above, in the present invention, since the spring piece is formed integrally with the movable blade, the cost can be reduced due to the reduction in the number of parts, as compared with the case where a separate spring member is used. Ru der those obtained the improvement of the assembling property. In addition, the spring piece has one end point of action on the edge of the movable blade and the other end has a fulcrum.
Is formed in a C-shape having the opposite side , the spring piece exerts a spring force so as to press the cutting edge side of the movable blade more strongly against the fixed blade side than the opposite side due to the positional relationship between the action point and the fulcrum. what Monodea, Therefore high edge side of the contact precision between the movable blade and the fixed blade in state, and are not for good sharpness, also spring piece which is formed in a C-shaped supporting point and create
The distance between the point of use is longer and a stable spring constant is obtained.
That can easily set the pressing force of the cutting edge
It is. A slide that guides the reciprocating movement of the movable blade
The ride guide groove is located between the point of action and the fulcrum.
Because it is provided inside the C-shape,
The dimension between the guide groove and the point of action of the spring piece is reduced
To prevent the movable blade from twisting during driving
Inside the C-shaped spring piece.
The guide blade can be accommodated and the movable blade can be downsized.
It is easy to do it.

[Brief description of the drawings]

FIG. 1 shows a blade block according to an embodiment of the present invention.
(a) is a perspective view, (b) is an exploded perspective view.

2A and 2B show a movable blade of the above, wherein FIG.
(B) is a sectional view .

FIG. 3 is a perspective view of a hair clipper provided with the blade according to the first embodiment.

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is a transverse sectional view of the same.

[Explanation of symbols]

Reference Signs List 21 fixed blade 22 movable blade 22a slide guide groove 27 spring piece 27a action point 27b fulcrum

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B26B 19/06

Claims (1)

(57) [Claims] 1. A blade comprising a comb-shaped fixed blade and a movable blade, wherein the movable blade is integrally provided with a spring piece for pressing itself against the fixed blade, and the spring piece has an action point at one end. Movable
Formed into a C-shape with the fulcrum at the other end on the opposite side on the tip side of the blade
That guide the sliding reciprocation of the movable blade.
When the ride guide groove is positioned between the point of action and the
A hair cutter blade provided on the movable blade inside the C-shape .