JPH0525576Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an electric shaver, and particularly relates to an improvement of the outer blade attachment structure.

(B) Prior Art Generally, the outer cutter that covers the upper opening of the frame is removably attached to the inner surface of the frame by a convex-concave fit.

JP-A-55-45481 has exactly such a structure. However, the fixing claw of the outer cutter provided on the frame side protrudes considerably inward, so if the inner cutter is close to it, there is a risk that it will come into contact with it, so to avoid this, the inner cutter must be made smaller. shaving efficiency decreases.

(c) Problems to be solved by the invention The present invention solves the conventional drawbacks and makes it possible for the fixing claws provided on the frame to hardly protrude inward of the outer blade.

(d) Means for solving the problem In order to fix the outer cutter to the frame by fixing a resin plate to the lower side of the outer blade and forming the edge of the square hole provided in this resin plate into a stepped shape. The engaging claw is engaged with the stepped portion.

(e) Effect By engaging the fixing pawl with the stepped portion, the pawl hardly protrudes inward of the outer cutter, eliminating contact with the inner cutter.

(f) Example An example of the present invention will be described based on the drawings.
Reference numeral 1 is a frame made of light alloy with openings on the upper and lower sides, and the lower opening is detachably attached to the upper part of the main body, which has an inner cutter 2 and a drive unit 3 such as a motor that drives the inner cutter in the left and right direction. In addition, a notch 4 into which a knob 16 of an outer cutter mounting plate 11 to be described later fits is provided at the lower end of one of the long side walls, and an opening 5 in which the edge shaving unit is located at the other long side wall. It is being 6 is a thin and flexible outer blade, and reinforcing resin plates 7 are fixed to the inner surfaces of both lower sides by welding 7', 7', etc. Further, resin plates 7 are attached to the left and right parts of this lower part.
At the same time, square holes 8, 8, . . . for attachment are provided, respectively. The lower ends of the square holes 8, 8 on the sides (inner surfaces) to which the outer cutters 6 are not fixed are formed into a stepped shape 8'.

Reference numeral 9 denotes a pair of protrusions integrally formed with the frame 1 on the upper inner surface of both short side walls 1a of the frame 1 in close proximity to one of the long side walls 1b (the side wall provided with the notch 4); These are a pair of recesses formed near the lower end opening of the lower part.

Reference numeral 11 designates a plastic outer cutter mounting plate, which has a pair of elastic protrusions 12 at the upper part of both ends that engage with the pair of protrusions 9, and a pair of elastic protrusions 12 that engage with the pair of recesses 10 at the lower part. The bulging portions 13 are each formed integrally. In order to impart elasticity to the convex portion 12 and the bulging portion 13, through holes 14 are provided at positions close to each other.
15... are provided. Reference numeral 16 denotes a knob portion formed between a pair of bulging portions 13, which is connected to the notch 4 of the frame 1.
It fits into the Reference numeral 17 denotes an engaging pawl provided at the upper part of the outer cutter mounting plate 11, which is tapered downward and is removably engaged with the stepped portion 8' of the square hole 8.

Reference numerals 18, 18... denote through holes for allowing the welded portion 7' of the outer cutter 16 to escape, and reference numeral 19 denotes engaging projections integrally formed on the left and right sides of the inner surface of the other long side wall of the frame 1,
Like 7, it is formed in a downwardly tapered shape and is detachably engaged with a stepped portion 8' of a square hole 8 of the outer cutter.

Then, the engaging claw 17 of the outer cutter mounting plate 11 is engaged with the stepped portion 8' of the square hole 8 at the bottom of one of the outer cutters 6 to integrate the outer cutter 6 and the mounting plate 11, and then After inserting the integrated product into the frame 1 from the lower opening of the frame 1 while curving the outer cutter 6 into a U-shape, the elastic convex portion 12 and the bulging portion 13 of the mounting plate 11
is engaged (fitted) with the protrusion 9 and recess 10 of the frame 1. At this time, the knob portion 16 of the mounting plate 11 is fitted into the notch 4 of the frame 1.

Stepped portion 8' of the square hole 8 on the other lower part of the outer sword 6
The locking protrusion 19 of the frame 1 engages with the locking protrusion 19, but the engagement may occur first during the process of inserting the mounting plate 11 into the frame 1, or after the mounting plate 11 is installed. , may be engaged last, or may be engaged substantially simultaneously with attachment of the mounting plate.

On the other hand, when disassembling the mounting plate 11, if the knob 16 of the mounting plate 11 is pulled downward or pressed laterally, the elastic convex part 12 and the bulging part 13 will be separated from the protrusion 9 and the recess 10, and then the knob part 16 will be removed. When pulled downward, the other square hole 8 of the outer cutter 6 will engage the locking protrusion 19 of the frame 1.
The whole can be removed from the frame 1.

In this invention, the square hole provided in the resin plate of the outer cutter is formed into a stepped shape, and the claw (engaging claw and locking protrusion) for fixing the outer cutter to the frame is engaged with this stepped shape. Therefore, the claws are approximately on the same plane as the resin plate and do not protrude inward.

(G) Effects Because of the above structure of the present invention, when the frame with the outer cutter attached is attached to and removed from the upper part of the main body, the claws do not come into contact with the inner cutter attached to the main body, and the inner cutter is not damaged. As a result, the inner cutter can be made larger than before, improving shaving efficiency.

[Brief explanation of the drawing]

The figures are all of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is an enlarged exploded perspective view of the main part, FIG. 3 is a sectional view, and FIG. 4 is an enlarged sectional view of the main part. 1... Frame, 8... Square hole, 8'... Stepped shape part, 6... Outer blade.

Claims (1)

[Scope of utility model registration request] A resin plate is fixed to the lower side of the outer blade, the edge of the square hole provided in the resin plate is formed into a step shape, and an engaging pawl for fixing the outer cutter to the frame is engaged with the stepped portion. An electric razor.