JP2667534C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner blade of a reciprocating electric shaver. 2. Description of the Related Art In a reciprocating electric shaver, Japanese Unexamined Utility Model Publication No. 61-132968 discloses an attempt to make the sound generated during shaving a pleasant sound. This is to change the width of the support member that holds a large number of blades side by side to make it easier to bend the blade at the reduced width, change the natural frequency, and when shaving Two types of shaving sounds, high frequency and low frequency, are generated. In this case, the shaving sound generated during shaving is certainly pleasant, but the presence of the portion where the blade is easily bent makes the sharpness poor when cutting a thick beard. There is a problem that. The present invention has been made in view of such a point, and an object of the present invention is to provide an inner blade of a reciprocating electric razor which can make shaving sound comfortable and at the same time exhibit good sharpness. To offer. Means for Solving the Problems According to the present invention, there are provided a plurality of blades, a supporting member which is partially embedded and supports each blade side by side, and the blades are arranged side by side. The inner blade reciprocatingly driven in the direction , the bendability is different between the forward path and the return path in the reciprocating motion, and the bendability in the movement to the flexible side is easier than other blades.
The present invention is characterized in that a blade which generates a shaving sound having a large frequency and a lower frequency than other parts is provided in the blade. In the reciprocating motion, the blade having different flexing easiness between the outward path and the return path has a buried depth of the blade in the support member is smaller on one surface side than the embedment depth of the other blades and the other surface side is protruded from the support member. Can be obtained with a blade facing the wall. [Operation] According to the present invention, a comfortable shaving sound can be obtained due to the presence of a blade that is easily bent in one direction of movement among a large number of blades, and is less likely to bend when moving in the opposite direction although it is easily bent. Therefore, the sharpness does not deteriorate. Then, when the burying depth of the blade in the support member is one surface side, the burying depth of another blade is
By making it shallower than the installation depth and facing the support wall protruding from the support member on the other surface side, it is possible to vary the ease of bending between the outward path and the return path in reciprocating motion,
In this case, even if all the blades are the same, the above characteristics can be given to some of the blades. [Example] Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. As shown in FIG. 4, this reciprocating electric shaver includes an outer blade 1 made of a thin metal plate held on an outer blade frame 2 and , An inner blade 4 and a main body 5. A cylindrical connecting part 50 protruding from one side of the main body 5 is provided in the main body 5 and protruded from a driver for converting the rotational motion of the motor into a reciprocating motion. This cylindrical connecting part 5
The outer blade 1 is reciprocally driven while being in contact with the inner surface of the outer cutter 1 under the bias of the push-up spring. The inner cutter 4 here is formed by a plurality of arcuate inner cutter blades 40, a support member 41 that supports the respective blades 40 in parallel by embedding both ends of the blades 40, and a joint 42. Have been. The joint 42 here has a connecting shaft 43 connected to the cylindrical connecting portion 50 from the center of the lower surface thereof, and connecting pieces 44 connected to the supporting member 42 from both ends of the upper surface. It has become. By reducing the thickness of a portion of the support member 41 connected to the connection pieces 44, 44 of the joint 42, the two blades 40, 4 facing this portion are reduced.
0, the buried depth on the opposing surface side is reduced.
Support walls 45 projecting from the support member 41 face each other. That is, the supporting member 41 has a thinned portion 41a other than the standard thickness,
A portion 41b having a thickness greater than the standard thickness due to the presence of the support wall 45 is provided. In the drawing, reference numeral 46 denotes a support member 4 in which one end of the blade 40 is embedded.
1 and a connecting piece connecting the other end of the blade 40 to the embedded support member 41, and both ends of the connecting piece 46 are integrally connected to the thin portion 41a. The inner blade 4 provided with the blade 40 in which the portions having different stiffnesses are formed by the difference in the thickness of the support member 41 is reciprocally driven during shaving. At this time, the stiffness is low. The blade 40, that is, the blade 40 in which the thin portion 41 a of the supporting member 41 is located behind in the driving direction of the inner blade 4 has a lower frequency than the other blades 40, It produces a sound of a relatively low frequency, which produces a pleasant shaving sound. Since the inner blade 4 is driven to reciprocate, the blade 40 having a low rigidity on the outward path has a thicker portion 41b on the backward path due to the existence of the support wall 45 on the backward path, and has a considerable rigidity. As a result, the blade 40 exhibits good sharpness, unlike the case where the blade 40 is simply bent. Further, in the present embodiment, a portion having a low rigidity and being easily radiused is a connecting portion between the support member 41 and the joint 42, that is, a push-up force for pressing the inner blade 4 against the outer blade 1 acts on the outer blade 1. Because it is provided in the part where the contact pressure is highest, that is, because it satisfies the high contact pressure, which is one of the conditions for obtaining good sharpness, the sharpness decrease due to low rigidity is It is covered by a high contact pressure with the outer blade 1. In addition, it is preferable that the blades 40 having low rigidity be provided in a minimum number that can provide a comfortable shaving sound. FIG. 5 shows another embodiment. This is because the supporting wall 45 provided on the other surface side of the two blades 40 when the burying depth on the opposing surface side of the two adjacent blades 40 is reduced, is provided by the two blades 40, 40
, So that the support wall 45 does not unduly increase the rigidity of the other blades 40. As shown in FIG. 6, two blades 40, 40 having a support wall 45 between the opposing surfaces.
The embedding depth of each other surface may be made shallower. As shown in FIG. 7, when the thickness of the blade 40 is reduced, the amount of reduction in the burying depth in the support member 41 can be suppressed. As described above, in the present invention, it is possible to make the sound generated during shaving comfortable by the presence of the blade that is easily bent in one-direction movement among many blades. Moreover, although it is easy to bend, it does not easily bend when it moves in the opposite direction, so that it does not cause deterioration of sharpness even for a thick beard. Then, when the burying depth of the blade in the support member is one surface side, the burying depth of another blade is
By making it shallower than the installation depth and facing the support wall protruding from the support member on the other surface side, it is possible to vary the ease of bending between the outward path and the return path in reciprocating motion,
In this case, even if all the blades are the same, the above characteristics can be given to some of the blades, so that manufacture is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of one embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are cross-sectional views taken along lines AA and BB in FIG. 3 is a plan view of the same embodiment, FIG. 4 is an exploded perspective view of the same embodiment, and FIGS. 5 to 7 are front views of different embodiments, where 4 is an inner blade, 40 is a blade, and 41 is a support. Reference numeral 45 indicates a support wall.

Claims (1)

Claims: (1) A plurality of blades, and a supporting member that partially supports these blades by being partially embedded and is reciprocally driven in the direction in which the blades are arranged. a inner cutter, together the ease deflection in the forward path and the backward path in the reciprocating differ
In addition, in the movement to the side that is easy to bend, the ease of bending is larger than other blades,
An inner blade of a reciprocating electric razor, wherein a blade that generates a shaving sound at a lower frequency than the blade is provided in the blade. (2) In the reciprocating motion, the blades having different flexing easiness between the outward path and the return path are such that the embedment depth of the blade in the support member is shallower on one side than the embedment depth of the other blades and the other side protrudes from the support member. The inner blade of a reciprocating electric razor according to claim 1, wherein the inner blade is a blade facing the supporting wall.