JPS635788A - Electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 【Technical field】

The present invention relates to an electric shaver, and particularly to a support structure for an inner cutter base to which an inner cutter is attached.

[Background technology]

In a rotary electric shaver, the inner cutter is attached to an inner cutter base that is normally driven to rotate, and a push-up spring attached to the inner cutter base is locked to the inner cutter, so that the inner cutter is attached to the inner cutter's inner surface. is in contact with. Here, by applying a predetermined contact pressure between the outer blade and the inner blade, the push-up spring not only brings the inner blade and the inner surface of the outer blade into close contact, but also increases the cutting resistance when cutting the beard. This prevents the blade from sinking and creating a gap between the outer and inner blades, and also allows the inner blade to sink in response to the deformation of the outer blade when the outer blade is pressed against the skin. This is to prevent the contact pressure from becoming abnormally high and the load resistance from becoming too strong.However, in order to counteract the cutting resistance, the contact pressure between the inner cutter and the outer cutter is increased. This causes problems such as not only the edge of the inner cutter and wear on the inner surface of the outer cutter, but also noise, and battery life in the case of battery-powered ones.

[Purpose of the invention]

The present invention has been made in view of these points, and its purpose is to reduce the contact pressure between the inner cutter and the outer cutter due to the push-up spring, and to reduce the sliding resistance between the two. To provide an electric shaver which has a low cutting edge and exhibits good cutting ability without creating a gap between an inner cutter and an outer cutter.

[Disclosure of the invention]

Therefore, the present invention has a push-up spring that elastically biases the inner cutter base to bring the inner cutter attached to the inner cutter base into close contact with the inner surface of the outer cutter, and a push-up spring that elastically biases the inner cutter base to bring the inner cutter attached to the inner cutter base into close contact with the inner surface of the outer cutter. The feature is that it is equipped with a damper that provides resistance to the rapid movement of the inner blade base, and the push-up spring only serves to bring the inner blade into close contact with the inner surface of the outer blade, making it easier to cut when cutting beard. The resistance is countered by a damper to prevent a gap from forming between the inner and outer blades. The present invention will be described in detail below based on the illustrated embodiment.The illustrated rotary electric shaver includes a housing 1, a motor 2 fixed to the bottom of the housing 1 via a motor base 3, an outer cutter 4 attached to the outer cutter 7 via a frame 5, an inner cutter 6 attached to an inner cutter base 7 connected to the output shaft of the motor 2 via a joint 8, and a push-up bone 11; It is composed of a damper 15. The peripheral edge of the outer cutter 4 is fixed to the outer cutter frame 5 by caulking, and as shown in FIG. 5, FIG. 6, and FIG. I'm trying to wrap my head around it. This elastic body 9 causes the caulked portion of the outer cutter frame 5 to return due to springback, which causes a reduction in the adhesion force of the outer cutter 4 on the outer cutter frame 5, causing the outer cutter 4 to wobble. It also prevents the outer cutter 4 from moving or following the inner cutter 6, and also absorbs the slight vibrations of the outer cutter 4 to prevent the generation of noise. As the elastic body 9, a polyester-based, rubber-based, molded resin-based, or urethane-based film sheet having a thickness of 0.02 to 0.05zi can be used. The inner cutter 6 is heat-sealed and fixed to the upper surface of the inner cutter base 7, and moves up and down together with the inner cutter base 7, and does not move up and down independently. On the other hand, the push-up spring 11 that brings the inner cutter 6 into contact with the inner surface of the outer cutter 4 is disposed between the housing 1 and the lower surface of the inner cutter base 7, and is concentric with the rotation center of the inner cutter base 7. It is formed by a coil spring installed in. Therefore, the push-up spring 11 is inserted into the inner cutter 6 via the inner cutter base 7.
is urged to bring the inner cutter 6 into contact with the inner surface of the outer cutter 4. The push-up spring 11 used here has only enough spring force to bring the inner cutter 6 into close contact with the inner surface of the outer cutter 4,
It is not designed to resist cutting resistance like when cutting a beard. The damper 15 includes a ring-shaped piston 16 projecting from the lower surface of the inner cutter base 7 and a ring 17 fixed to the upper surface of the housing 1 with screws. The ring 17 has a pair of concentric annular lips 18, 18 protruding from its upper surface, so that the piston 16 is attached to both lips 18, 1811].
It forms a ring-shaped sill-19 that fits into it, and functions as an air damper. That is, in normal times, as shown in FIG.
The inner cutter base 7 is pushed up by the spring force of the inner cutter 6.
is in close contact with the inner surface of the outer cutter 4, and a space is created between the piston 16 and the bottom of the cylinder 19, and in this state, the damper 15 has no function. , when the inner blade 6 and the inner blade base 7 are rapidly sunk downward, such as when cutting beard, the damper 1
5 resists the lowering of the inner blade base 7 of the knee. To explain in more detail, when the inner cutter base 7 sinks at low speed, such as when the outer cutter 4 is pressed against the skin, the air inside the syringe 19 is smoothly discharged to the outside through the gap between it and the piston 16. As a result, there is little resistance to the sinking of the inner cutter base 7, and as a result, @3
As shown in the figure, the inner cutter base 7 and the inner cutter 6 sink, but the rapid sinking of the inner cutter base 7 is caused by the air inside the shilling-19 being rapidly pushed out through the gap. The turbulent flow resistance acts as a resistance against sinking and prevents the inner cutter base 7 from sinking, as shown in Figure @4. In this way, the damper 15 prevents the inner cutter base 7 and the inner cutter 6 from lowering to reduce the cutting resistance when cutting the beard.
This prevents a gap from forming between the blade and the outer cutter 4, which reduces sharpness and prevents hair from getting caught. Although an embodiment of a rotary electric shaver is shown here, it goes without saying that a reciprocating electric shaver can also be applied to a shaver.

【Effect of the invention】

As described above, in the present invention, since a damper is provided that provides resistance to the rapid movement of the inner cutter in the direction away from the inner surface of the outer cutter, the cutting resistance when cutting the beard can cause the inner cutter and outer cutter to There is no gap between the cutter and the outer cutter, resulting in good cutting performance.Also, because of the presence of the damper, the push-up spring has enough spring force to bring the inner cutter into close contact with the inner surface of the outer cutter. You can use only what you have,
Therefore, the contact pressure between the inner cutter and the inner surface of the outer cutter can be kept low, reducing sliding resistance, which reduces wear on the inner and outer cutters. It will be long.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a horizontal sectional view of the same, and FIGS. 3 and 4 are sectional views showing the operation of the same.
FIG. 5 is an enlarged cross-sectional view of a part of the same as above, and FIGS. 6 and 7 are enlarged cross-sectional views of a part of the same when assembled, in which 1 is a hawanong, 4 is an outer cutter, and 6 is an inner cutter. , 7 is an inner cutter base, 11 is a push-up spring, 151 is a main damper, 16 is a piston, and 19 is a sill. Agent Patent Attorney Ishi 1) Chief 7s1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A push-up spring that elastically biases the inner cutter base to bring the inner cutter attached to the inner cutter base into close contact with the inner surface of the outer cutter, and an inner cutter base that moves the inner cutter away from the inner cutter surface. An electric shaver comprising: a damper that provides resistance to rapid movement of the base. (2) The damper is an air damper consisting of a ring-shaped piston protruding from the inner cutter base that is rotationally driven, and an annular cylinder into which this piston fits, and the push-up spring is used to rotate the inner cutter base. The electric shaver according to claim 1, wherein the electric shaver is a coil spring arranged concentrically with the center.