JPH026916Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention particularly relates to a structure for positioning the cutting edge of a blade body in a two-blade safety razor.

(Problems to be solved by conventional techniques and ideas) As a conventional two-blade safety razor,
There is one shown in No. 168273 and another shown in Japanese Patent Application No. 124195-1983. For example, with the former two-blade safety razor,
Upper and lower blade bodies are held between the blade stand and the cover via a spacer, and the cutting edges of the upper and lower blade bodies protrude to the vicinity of the shaving tangent plane connecting the cover and the guard on the front side of the blade stand. The position of the cutting edge relative to the shaving tangential plane and the mutual positional relationship between the cutting edges of the upper and lower blade bodies have a subtle effect on the shaving quality, and are therefore very important when assembling a safety razor.

Normally, when assembling a double-blade safety razor,
Lay the lower blade, spacer, upper blade, and cover on the blade stand in sequence, and press the rear sides of the upper and lower blades with a special holding tool, and press the left and right sides of the cutting edges of the upper and lower blades to the stopper surfaces on both the left and right sides of the cover. The cover was fixed to the blade rest with the cover in contact with the blade. However, since a special holding tool was required, assembly work was very troublesome.

In addition, with this blade positioning structure, when the upper and lower blades are in contact with the stopper surface of the cover, the position of the blade with respect to the shaving tangent surface and the mutual positional relationship between the blades of the upper and lower blades are optimized. However, in the unlikely event that the blade rest and cover become loose, the cutting edges of both the upper and lower blades will shift backwards, making it impossible to maintain the optimum position of the cutting edges. It may also have a negative effect on the quality of the shave.

Structure of the invention (means for solving the problem) The present invention has been made in view of this problem, and as shown in the drawings of the embodiments described later, the invention is based on the following: The stopper surfaces 13, 14, on which the left and right sides of the cutting edges 15a, 16a of the blades 15, 16 placed on the blades are in contact, elastically engage with the rear sides of the blades 15, 16. Spring parts 6 and 7 are provided on the blade support part 1 to press the spring parts 6 and 7 toward the stopper surfaces 13 and 14.
The blade bodies 15 and 16 are held between the spring parts 6 and 7.

(Function) Then, the rear sides of the blade bodies 15 and 16 are connected to the spring parts 6 and 7.
is pressed toward the stopper surfaces 13 and 14 by the elastic force of the blades 15 and 16.
Both left and right sides of 5a and 16a are stopper surfaces 13 and 14
comes into contact with.

(Example) Hereinafter, an example in which the present invention is embodied in a flat type two-blade safety razor will be described with reference to the drawings.

The blade support part 1 consists of a blade stand 2 and a cover 3,
It is designed to be detachably attached to a holder (not shown). Blade mounting surfaces 4 and 5 extending in the left-right direction are formed on both front and rear sides of the upper surface of the blade stand 2, and a leaf spring portion 6, 7 is provided to protrude upward.

The cover 3 has a frame shape with left and right frame portions 8, a front guard 9, and a rear frame portion 10, and a clamping portion 11 is provided between the left and right frame portions 8 on both front and rear sides between the guard 9 and the rear frame portion 10. , 12 have been constructed. In front of each clamping part 11, 12, left and right side frame parts 8
Stopper surfaces 13 and 14 are formed on the lower surface of.

The upper and lower double blade bodies 16 and 15 are placed on the blade mounting surfaces 5 and 4 of the blade stand 2, and the cutout portions 17 formed in the left and right center portions of the rear sides of the upper and lower blade bodies 16 and 15 are placed on the blade mounting surfaces 5 and 4 of the blade stand 2. The plate spring parts 7, 6 are inserted into the plate spring parts 7, 6.

With the upper and lower blade bodies 16 and 15 placed on top of each other, the cover 3 is placed on top of the upper and lower blade bodies 16 and 15, and the fitting uneven portion 18 formed at the left and right center of the front side of the blade stand 2 and the cover 3 and the guard of the cover 3 are placed on top of each other. 9 and a plurality of engaging claws 19 protruding from the lower surface of the rear frame portion 10.
With this, the blade base 2 and the cover 3 are fitted to each other, and the caulking projections 20 protruding downward from both left and right sides of the clamping parts 11 and 12 of the cover 3 are attached to the upper and lower blade bodies 16 and 15 and the blade. The lower surface of the blade stand 2 is penetrated through the stand 2.

In this overlapping state, the upper and lower blade bodies 16, 1
The notch 17 on the rear side of the blade 5 presses the leaf spring parts 6 and 7 backward, and this reaction causes the upper and lower blade bodies 16 and 15 to
is pressed forward, and the elastic force caused by this reaction causes the cutting edges 16a, 15 of the upper and lower blade bodies 16, 15 to
The left and right sides of a are the stopper surfaces 14 of the cover 3,
13. In this abutting state, the caulking protrusion 20 of the cover 3 is thermally fused, and the upper and lower blade bodies 16, 15 are clamped between the blade base 2 and the cover 3.

In this way, the cutting edge 16 of the upper and lower blade bodies 16, 15
a, 15a are always in contact with the stopper surfaces 14, 13 due to the elasticity of the leaf springs 7, 6, so that the blade edges are not aligned with the shaving tangent plane P connecting the guard 9 of the cover 3 and the clamping portions 11, 12. 15a, 16a are accurately positioned, and the upper and lower double blade bodies 16, 15
The mutual positional relationship between the cutting edges 16a and 15a is also set accurately. Furthermore, unlike the prior art, no special presser is required during assembly, which greatly facilitates assembly. Furthermore, even if loosening occurs between the blade rest 2 and the cover 3, the loosening can be tolerated within the range of deflection of the leaf spring parts 6 and 7, thereby preventing swinging of the upper and lower blade bodies 16 and 15. be able to.

In the embodiment detailed above, the stopper surfaces 13, 14
is formed on the cover 3, and the plate spring portion 6,
7 are formed on the blade rest 2;
Alternatively, it may be formed on any of the cover 3.
Further, the present invention can be applied to two-blade safety razors other than the flat type safety razor described in this embodiment and other single-blade safety razors.

Effects of the invention In short, according to the invention, the cutting edges 15a, 16a of the blade bodies 15, 16 are always brought into contact with the stopper surfaces 13, 14 due to the elasticity of the spring parts 6, 7, so that It is possible to accurately position the blades 15a and 16a, the assembly work is greatly facilitated, and the swinging of the blade bodies 15 and 16 can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing only the blade support portion of a two-blade safety razor according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 4 is a sectional view taken along line C-C in FIG. 1, FIG. 5 is a sectional view of only the cover taken along line D-D in FIG. 1, and FIG. 6 is a sectional view taken along line DD in FIG. FIG. 3 is a bottom view of the blade support section shown in FIG. DESCRIPTION OF SYMBOLS 1... Blade support part, 2... Blade stand, 3... Cover, 4, 5... Blade mounting surface, 6, 7... Leaf spring part, 11, 12... Clamping part, 13, 14... Stopper surface, 15, 16... Blade body, 15a, 16a...
...Blade tip, P...Shaving tangent surface.

Claims (1)

[Claims for Utility Model Registration] 1. Stopper surfaces 13, 14 on which the left and right sides of the cutting edges 15a, 16a of the blades 15, 16 placed on the blade mounting surfaces 4, 5 of the blade support 1 come into contact; , spring parts 6 and 7 that elastically engage with the rear sides of the blade bodies 15 and 16 and press the blade bodies 15 and 16 toward the stopper surfaces 13 and 14;
A blade positioning structure for a safety razor, characterized in that the blades 15 and 16 are sandwiched between the stopper surfaces 13 and 14 and the spring parts 6 and 7. 2 The blade support part 1 includes a blade stand 2 on which blade mounting surfaces 4 and 5 are formed, and a blade 1 on these blade mounting surfaces 4 and 5.
The stopper surfaces 13, 14 are formed on the cover 3, and the spring parts 6, 7 are formed on the blade base 2. The blade positioning structure of the safety razor described in .