JPS591658Y2 - electric razor - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of an electric shaver, in particular, to eliminate malfunction of the shaving mechanism and to reduce the operating force.

The applicant has disclosed that the driving protrusion and the connecting piece are rotated against the spring force by rotating the connecting piece of the Kizokuri block, which is rotatably supported around the shaft and constantly biased in the release direction by a spring member. We proposed an edge mechanism in which an operating piece that connects the switch is provided in conjunction with an operating button for opening and closing the switch.

However, with this structure, since the operation piece and the operation button side are integrally formed, it is difficult to drive the main blade, which is frequently used and consists of a net blade and a semi-cylindrical inner blade. It is necessary to slide the operating piece that drives the cutting block at the same time, so the operating force is heavy, and the sliding stroke of the operating piece is short from the switch OFF position of the operating button to the driving position of the edge cutting blade. Therefore, the timing at which the driving protrusion and the connecting piece are connected, which requires precision, is likely to vary due to variations in the manufacturing process, and this variation tends to generate knocking sounds and unpleasant noises during coupling.

This idea was made in view of the above circumstances, and includes a sharpening block mounted on the main body parallel to the reciprocating direction of the main blade, and a drive protrusion protruding from the drive shaft for the main blade. , the operation piece that connects the drive connecting piece of the edge rib block that is rotatably supported on the main body side in a direction perpendicular to the reciprocating direction is a switch opening/closing operation button that slides along the wall surface of the main body. The operating piece is formed separately from the operating button, and is arranged to slide along the wall surface of the main body in the same direction as the sliding direction of the operating button, and the operating piece is placed at a position where it is pushed up by sliding of the operating button. It is equipped with a locking part to prevent it from falling.

With this configuration, the operating button and separate operating piece only move when the operating button slides after the switch is closed, so only the main blade, which is frequently used, is driven. Therefore, in this case, the operating force can be reduced without driving the operating piece.

In addition, since the operation button and operation piece are separate,
Only the operating side can be assembled to the main body with high precision.
The coupling timing between the drive protrusion and the connection can be determined with accuracy, and it is possible to prevent knocking sounds and unpleasant noises at the time of coupling.

Examples of this invention will be described below with reference to the drawings.

1 is a main body composed of a grip case 2 and an outer cutter frame 3;
A motor drive source 30, a switch 4, etc. are built into the gripping case 2, and an eccentric cam 31 of the drive source 30 is mounted on the upper end surface.
As a result, a drive shaft 6 that reciprocates in the left-right direction (front and back directions in FIG. 4) is slidably mounted to move the main blade portion 5. A drive protrusion 7 for use is integrally molded.

On the side of the outer cutter frame 3, parallel to the reciprocating direction of the main blade portion 5, there is a fixed blade 8 having a willow blade-shaped cutting edge, and a movable blade 9 that slides under pressure on the fixed blade. Narukiwazoriba 1
0 is fixed, and a rib block A is specifically constituted by a support member 11 made of synthetic resin fixed to the lower surface of the movable blade 9, and a connecting piece 13 rotatably fitted to the shaft 12 of this support member 11. are doing.

The movable blade 9 and the support member 11 are fixed by inserting the protrusion 14 of the support member 11 into the small hole 15 of the movable blade 9 and welding them. The notch groove 16 of the connecting piece 13 is press-fitted into the connecting piece 13 to connect the connecting piece 13 to the connecting piece 13 .

The spring material 17 has its center fitted onto the shaft 12 of the support member 11, and the upper end 17a is engaged with the lower surface of the movable blade 9, and the lower end 17b is engaged with the protrusion 18 of the connecting piece 13, so that the lower end is connected to the inclined surface 13a. The connecting piece 13 is fixed in a biased state in the direction of arrow B (release direction).

In the mounted state shown in FIG. 4, a window hole 19 is passed through the upper end of the gripping case 2 at a position corresponding to the edge rib block A.
An operating piece 22 that is slidable in the vertical direction is provided, and is pushed up and moved upward by operating an operating button 23 mounted on the side of the grip case 2 so as to be movable up and down, and the pushing force of the operating button 23 is applied. By releasing it, it will move downward.

This operating piece 22 is made of elastic synthetic resin such as polyacetal or polyamide, and has an operating protrusion 22a protruding from the center, and elastic arms 22 on both sides of the operating protrusion 22a.
b.

A wire spring 32 is press-fitted into a pair of projections 22C below the operation projection 22a.A locking portion 33 protruding from the grip case 2 prevents the wire spring 32 from falling downward. By pressing the end against the inner wall of the upper end of the grip case 2, it serves to push the operating piece 22 back downward when the push-up force of the operating button 23 is released.

At this time, the operating piece 22 is supported by the locking portion 33.

Reference numeral 24 denotes an operation plate fixed to the inner end of the operation button 23, which has a U-shape, and has arm portions 24a at both ends that connect the operation piece 22.
, and serves to push up the operating piece 22 in conjunction with the operation of the operating button 23.

The operating rod 4a of the switch 4 is fitted into the notch 25 of one arm 24a of the operating plate 24, and the switch 4 can be turned OFF or ON→Tri by moving the operating rod 4a.
It is switched to m.

24b is an elastic arm for positioning the operation plate 24, and two positioning protrusions 34 protruding from the grip case 2,
The position of the operation panel 24 can be switched to three stages.

Next, the operating relationship between the operation button 23 and the operation piece 22, and the switch 4 and the connecting piece 13 of the rib block A will be explained with reference to FIG.

When the switch shown in FIG. 51 is in the OFF position, the power is turned off and the drive shaft 6 does not operate.

When the operation button 23 is moved to the ON position shown in FIG. The drive shaft 6 has the same reciprocating motion, but the drive protrusion 7 and the connecting piece 1
3 is in the released state, the scraping blade 10 is not operating.

) At this time, the upper end of the operating plate 24 and the lower end of the operating piece 22 are in a state where they abut each other through the locking portion 33, or are in a state where they are close to each other with a slight gap between them.

(Figures 1 and 4 also show this state.

) Therefore, the operation button 23 can be easily operated since there is no need to move the operation piece 22.

When the operation button 23 is further moved upward to the state shown in FIG.
The inclined surface 22a at the tip of 2 is the inclined surface 13a of the connecting piece 13.
, the connecting piece 13 moves in the direction opposite to the arrow B against the spring force of the spring member 17, and the connecting piece 13 and the driving protrusion 7
and are combined.

At this time, since the drive protrusion 7 is reciprocating in the left-right direction together with the drive shaft 6, the cutting blade 10 performs a hair cutting operation.

Contrary to the above, if the operating button 23 is pressed down from the state shown in FIG. 5, the restoring force of the wire spring 32 of the operating piece 22 pushes it back downwards, abuts against the locking part 33, and positions it.

Therefore, it is clear that if the operation button 23 is successively pressed down from the state shown in FIG. 5, the state will change to FIGS. 3 to 1, which is completely opposite to the above.

As described above, according to this invention, the operation button 23
can be easily operated, and the coupling accuracy between the connecting piece 13 and the driving protrusion 7 can be improved.

[Brief explanation of drawings]

Figure 1 is a front longitudinal cross-sectional view showing one embodiment of this invention;
3 and 3 are exploded perspective views of essential parts of FIG. 1, FIG. 4 is a side longitudinal sectional view of FIG. 1, and FIG. 5 is an explanatory diagram of the operation of the embodiment of FIG. 1. 1...Main body, 5...Main blade part, 6.
... Drive shaft, 7... Drive protrusion, 22...
...Operation piece, 23...Operation button, 33.
...Locking part, A...Kiwazo re-block.

Claims (1)

[Scope of utility model registration request] A sharp block A parallel to the reciprocating direction of the main blade part 5
is attached to the main body 1, and includes a drive protrusion 7 protruding from the drive shaft 6 for the main blade portion 5, and an edge shaft supported pivotably on the main body 1 side so as to be rotatable in a direction orthogonal to the reciprocating direction. Block A
The operation piece 22 that is connected to the driving connection piece 13 is formed separately from the switch opening/closing operation button 23 that slides along the wall surface of the main body, and is also formed separately from the switch opening/closing operation button 23 that slides along the wall surface of the main body. The electric shaver is provided with a locking part 33 that prevents the operating piece 22 from falling at a position where the operating piece 22 is moved upward by sliding of the operating button 23.