JPH0277287A - Internal blade for reciprocating electric razor - Google Patents

Abstract

PURPOSE:To cause a shaving sound to be comfortable and, simultaneously, to exert a satisfactory sharpness by causing the rigidity of a blade positioned in the connecting part of a joint and a base to be lower than the rigidity of the blade positioned in other part. CONSTITUTION:An internal blade 4 is composed of plural internal cutting blades 40, a supporting member 41 to be parallelly provided and to support the blades 40, and a joint 42. For the joint 42 here, a connecting shaft 43 connected from the lower surface center to a cylindrical connecting part 50 is projected, and simultaneously, projecting pieces 44 and 44 connected from both edges of the upper surface to the supporting member 42 are projected. By thinning the thickness of the part connected to the connecting pieces 44 and 44 of the joint 42 in the supporting member 41, the rigidity of the blade 40 positioned in the connecting part of the joint 42 and supporting member 41 is made lower than the rigidity of the blade 40 positioned in the other part.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an inner cutter for a reciprocating electric shaver.

[Conventional technology]

In a reciprocating electric shaver, an attempt has been made to make the sound produced during shaving more pleasant. This is done by partially changing the width of the support member that holds many blades in parallel, making the blades in the narrower width areas easier to bend and changing their natural frequency, which helps when shaving. Two types of shaving sounds, high frequency and low frequency, are generated.

[Problem to be solved by the invention]

In this case, the shaving sound produced when shaving is certainly pleasant, but the existence of a part where the blade is easily bent causes a problem in that the blade becomes dull when cutting thick beards. The present invention has been made in view of these points, and its purpose is to provide an inner blade for a reciprocating electric shaver that can provide a pleasant shaving sound and at the same time exhibit good sharpness. It is on offer.

[Means to solve the problem]

Therefore, the present invention provides an inner cutter comprising a support member that supports these blades in parallel, and a joint that connects this support member to a drive member, the blade being located at the connection portion between the joint and the base. The blade is characterized in that the rigidity of the blade is lower than that of the blade located in other parts. [Function] According to the present invention, by providing a blade that has low rigidity and is easy to bend, it is possible to obtain a pleasant shaving sound similar to the conventional example, and this low rigidity portion is used as a joint. By positioning the outer cutter at the connecting portion with the support member, the contact pressure between the outer cutter and the blade is highest in the portion of the blade where the rigidity is small. [Example] The present invention will be described in detail below based on the illustrated example. As shown in FIG. , inner blade 4
and a main body 5. A cylindrical connecting portion 50 protrudes from a driver disposed inside the main body 5 and converts the rotational motion of the motor into reciprocating motion, and the inner cutter 4 has a push-up spring arranged inside. By being connected to this cylindrical connecting portion 50, the blade is reciprocated while being in contact with the inner surface of the outer cutter 1 while being biased by a push-up spring. The inner cutter 4 here includes a plurality of inner cutter blades 40,
It is formed from a support member 41 that supports these blades 40 in parallel, and a joint 42. The joint 42 here has a connecting shaft 43 connected to the cylindrical connecting part 50 protruding from the center of its lower surface, and
A connecting piece 44 connected to the support member 42 from both ends of the upper surface.
44 is installed protrudingly. And the connecting piece 4 of the joint 42 in the support member 41
By reducing the thickness of the portion connected to 4.44, the rigidity of the blade 40 located at the connection portion between the joint 42 and the support member 41 is made lower than the rigidity of the blade 40 located at other portions. . In this inner cutter 4, blades 40 with different rigidities are mixed, and when shaving is performed by reciprocating the inner cutter 4, parts with different stiffness, and parts with different ease of bending, Sounds of different frequencies are generated, and by setting these frequencies such that the higher frequency is 8 to 12kHz, and the lower frequency is 6 to 8kHz, which is generated by parts that have less rigidity and are easily bent, it is possible to It makes a pleasant shaving sound. If the blade 40 that is easily bent in this way is provided, the sharpness would deteriorate as described in the conventional example, but here, the part that is easy to bend due to its low rigidity is used as a support member. A connecting part between 41 and joint 42,
In other words, the inner cutter 4 is provided at a portion where the contact pressure with the outer cutter 1 is highest since a pushing force that presses the inner cutter 4 against the outer cutter 1 acts. This high contact pressure is one of the conditions for obtaining good sharpness, and the decrease in sharpness due to low rigidity is compensated for by the high contact pressure with the outer cutter 1. That's why. Here, depending on the thickness of the support member 41, the blade 4
Although the rigidity of the blade 40 is changed, the rigidity may be changed by changing the thickness of the blade 40. Further, the frequency of the sound generated during shaving can also be changed depending on the thickness of the blade 40 and the thickness of the support member 41.

【Effect of the invention】

As described above, in the present invention, since the stiffness of the blade is changed in a part, it is possible to make the sound generated during shaving pleasant. Although it is provided, this part is located at the connection part between the support member and the joint, so that the contact pressure with the outer blade is the highest, so it prevents deterioration of sharpness due to the ease of bending of the blade. It is something that can be done.

[Brief explanation of the drawing]

Figure 1 shows the front section of an embodiment of the present invention, Figures 2 (a) and (b)
1 is an AA line sectional view and a BB sectional view in FIG. show. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) An inner cutter consisting of a large number of blades, a support member that supports these blades in parallel, and a joint that connects this support member to a drive member, and the joint between the joint and the base. An inner blade of a reciprocating electric shaver, characterized in that the rigidity of the blade located in the position is lower than the rigidity of the blade located in other parts.