JPH0733735Y2 - Support structure of blade in two-blade safety razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Industrial field of application] The present invention relates to a structure for sandwiching and supporting both blades between a blade base and a cover in a two-blade safety razor.

[Prior Art] As a conventional two-blade safety razor, for example, SAIkai 61-13297
There is one shown in Japanese Patent No. 1. In this two-blade safety razor, as shown in FIG. 6, a pair of front and rear blade mounting surfaces 4a, 5a are juxtaposed on the blade base 2 and are superposed on the blade base 2. Locking shafts 13 and 14 are provided on the cover 9 so as to correspond to the two-blade mounting surfaces 4a and 5a. Each locking shaft 13,14 of the cover 9
Is pierced and is attached to the blade base 2.

[Problems to be solved by the invention] However, in this two-blade safety razor, a straight line L parallel to the axis 14a of the locking shaft 14 on the blade 8 side is passed through the cutting edge 8a of the blade 8 on the rear side. However, the back part 7b of the front blade body 7 corresponding to this cutting edge 8a
Since they intersect with each other, the respective locking shafts 13 and 14 of the cover 9 are attached to the double blades 7 and 8.
When penetrating through the supporting hole 15 along the shaft centers 13a and 14a of the locking shafts 13 and 14, the rear blade body 8 is attached to the cover 9 first, and then the front blade body 7 is covered. The double-edged bodies 7 and 8 cannot be attached to the cover 9 unless the procedure of attaching to the cover is performed. For example, if the double blades 7 and 8 are attached in the opposite manner to the above-mentioned case, the blade portion 7b of the front blade body 7 attached earlier is
The blade tip 8a of the rear blade body 8 to be mounted later comes into contact with the blade body 8 so that the blade body 8 cannot be mounted. Therefore, the procedure for attaching the blades 7 and 8 to the cover 9 is limited, and if the operator makes a mistake in the procedure, the work efficiency is reduced.

The present invention aims to improve the work efficiency by making it easy to attach the double-edged body to the cover in such a two-blade safety razor.

Configuration of the Invention [Means for Solving the Problems] In view of this object, the present invention provides a pair of front and rear blade mounting surfaces 4a, 5a on a blade base 2 as shown in the drawings of an embodiment described later. At the same time, the cover 9 superposed on the blade base 2 is provided with locking shafts 13 and 14 corresponding to the blade mounting surfaces 4a and 5a, and is mounted on the blade mounting surfaces 4a and 5a. The locking shafts 13 and 14 of the cover 9 are passed through the supporting holes 15 of the front and rear blades 7 and 8 to engage the locking shafts 13 and 14 with the blade base 2, and the blades 7 and 8 are fixed to the blade base. In the two-blade safety razor sandwiched between the cover 2 and the cover 9, a straight line L parallel to the axis 14a of the locking shaft 14 on the rear blade 8 side is passed through the blade edge 8a of the rear blade 8. The back edge 7b of the front blade 7 corresponding to the edge 8a is not intersected.

[Operation] In the present invention, when the support hole 15 of the rear blade body 8 is fitted to the rear locking shaft 14 of the cover 9 along the axis 14a of the same locking shaft 14, the rear blade. When the locus of movement of the body 8 and the support hole 15 of the front blade 7 on the front locking shaft 13 of the cover 9 are fitted along the axis 13a of the same locking shaft 13, the front blade 7 Since the movement trajectories do not interfere with each other, it is possible to surely attach the blade bodies 7 and 8 to the cover 9 regardless of which of the blade bodies 7 and 8 is fitted first.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, a blade base 2 is provided on the upper end of the holder 1.
Are provided so as to extend in the left-right direction. This blade 2
A guard 3 is formed on the front side edge of the blade so as to extend in the left-right direction, and a pair of front and rear blade mounting portions 4, 5 are formed on the blade base 2 behind the guard 3 along the guard 3. ,
A beard removing hole 6 is formed between the guard 3 and the front blade mounting portion 4 and between the front and rear blade mounting portions 4 and 5.
Blade body mounting surfaces 4a, 5a are formed on the front and rear blade body mounting portions 4, 5, and a pair of front and rear blade bodies 7, 8 are mounted on the front and rear blade body mounting surfaces 4a, 5a.

The cover 9 is composed of left and right side frame portions 10 and a pair of front and rear sandwiching portions 11 and 12 which are installed between them.
On the lower side of 12, four locking shafts 13 and 14 are provided so as to project downward in parallel with each other and are arranged side by side in the left-right direction.

The front and rear blades 7 and 8 have support holes corresponding to the locking shafts 13 and 14, respectively.
15 is transparently provided, and the front and rear blade mounting portions 4 and 5 of the blade base 2 are similarly provided with locking holes 16 corresponding to the locking shafts 13 and 14 in the vertical direction.

These double blades 7 and 8 are the blade mounting surfaces 4a and 5 of the front and rear blade mounting portions 4 and 5, respectively.
In the state of being placed on a, the support holes 15 and the locking holes 16 are aligned with each other, and the locking shafts 13 and 14 of the cover 9 are inserted into the support holes 15 and the locking holes 16 respectively. The lower ends of the locking shafts 13 and 14 are attached to the lower sides of the front and rear blade mounting portions 4 and 5, respectively.

In this way, in the state where the cover 9 is superposed on the blade stand 2,
The front and rear blades 7, 8 are sandwiched between the front and rear blade mounting portions 4, 5 of the blade base 2 and the front and rear sandwiching portions 11, 12 of the cover 9, and sandwiched between the guard 3 of the blade base 2 and the front and rear both. A shaving tangential surface P connecting the tops of the attachment portions 11 and 12 is formed in a plane shape and is orthogonal to the shaft centers 13a and 14a of the locking shafts 13 and 14 of the cover 9. The blade mounting surfaces 4a and 5 of the front and rear blade mounting portions 4 and 5 with respect to the shaft centers 13a and 14a of the locking shafts 13 and 14, respectively.
a has an inclined shape that inclines upward as it goes forward, and the front and rear double-edged bodies 7, 8 placed on the double-edged body mounting surfaces 4a, 5a also have a slanted shape, and the cutting edges 7a, 8a are the same as described above. It is located on the shaving tangential plane P. Under the right and left side frame portions 10 of the cover 9, there are formed stopper surfaces 17 for contacting the left and right ends of the blade edges 7a, 8a of the front and rear blade bodies 7, 8 to position the front and rear blade bodies 7, 8. .

In particular, a straight line L that passes through the blade edge 8a of the rear blade body 8 and is parallel to the axis 14a of the rear side locking shaft 14 has a back portion 7b of the front blade body 7 located on the lower front side of the blade edge 8a. It is designed not to cross.

The two-blade safety razor thus constructed is assembled as follows. For example, first, as shown in FIG. 4 (a), the rear blade body 8 is attached to each locking shaft 14 of the rear sandwiching portion 12 of the cover 9.
5, each supporting hole 15 of the front blade 7 is fitted to each locking shaft 13 of the front sandwiching portion 11 of the cover 9 as shown in FIG. , The front and rear blades 7, 8 are attached to the cover 9.

In the above-described conventional technique, the operation can be performed only by the work procedure of attaching the front blade 7 after the rear blade 8 is thus attached first, but in the present embodiment, FIG. It is also possible to attach the front blade body 7 first as shown in b) and then attach the rear blade body 8 as shown in FIG. That is, either one of the front and rear blades 7, 8 may be attached first.

Then, from the state shown in FIG. 5, attach the locking shafts 13 and 14 to the blades 7 and 8.
Each support hole 15 and each locking hole 16 of the blade mounting portions 4 and 5 of the blade base 2.
1 and then fastened, and the assembled state shown in FIG. 1 is obtained.

As described above, each locking shaft 13 of the sandwiching portion 11 on the front side of the cover 9
When the support hole 15 of the front blade 7 is fitted along the axial center 13a of the locking shaft 13, the movement path of the front blade 7 and the rear sandwiching portion 12 of the cover 9 When the support shaft 15 of the rear blade body 8 is fitted into the locking shaft 14 along the axis 14a of the locking shaft 14, the movement loci of the rear blade body 8 do not interfere with each other, so both blades Both front and rear blades even if either body 7 or 8 is fitted first
7 and 8 can be securely attached to the cover 9. Therefore, the operator does not need to consider the procedure for attaching the blade bodies 7 and 8 to the cover 9, and the attachment becomes easier.
The work efficiency is improved accordingly.

Effect of the Invention According to the present invention, the front and rear blades must be securely attached to the retaining shaft of the blade cover regardless of which blade is attached first to the retaining shafts located in the front and rear of the cover. Therefore, the operator does not need to consider the installation procedure, and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an assembly showing a two-blade safety razor according to this embodiment, FIG. 2 is a partial perspective view of the same assembly, FIG. 3 is a partially exploded perspective view of the same, and FIG. FIG. 6B is a partial cross-sectional view showing a state where either blade is attached to the cover, and FIG. 5 is a partial cross-sectional view showing a state where both blades are attached to the cover.
The drawing is a partial sectional view of a conventional two-blade safety razor for assembling. 2 ... Blade stand, 4,5 ... Blade mount, 4a, 5a ... Blade mount surface, 7,8 ... Blade, 8a ... Blade tip, 7b ... Back, 9 ... Cover , 11,12 …… Clamping part, 13,14 …… Locking shaft, 13a, 14a…
… Axis, 15 …… Support hole, 16 …… Locking hole.

Claims (1)

[Scope of utility model registration request] 1. A pair of front and rear blade mounting surfaces (4) on a blade base (2).
a, 5a) are juxtaposed, and the locking shafts (13, 14) are projected on the cover (9) that overlaps with the blade base (2) in correspondence with the two-blade mounting surface (4a, 5a). And the supporting shafts (15) of the front and rear blades (7, 8) placed on the blade mounting surfaces (4a, 5a) penetrate the locking shafts (13, 14) of the cover (9). A two-blade safety razor in which the locking shafts (13, 14) are engaged with the blade base (2), and the blade bodies (7, 8) are sandwiched between the blade base (2) and the cover (9). A straight line (L) that passes through the blade edge (8a) of the rear blade body (8) and is parallel to the axis (14a) of the locking shaft (14) of the rear blade body (8) is Front blade corresponding to (8a) (7)
A support structure for a blade in a two-blade safety razor, characterized in that it does not intersect the back (7b) of the blade.