JPH11319341A - Electric razor edge structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a movable edge smoothly reciprocate without shifting from a fixed edge by constructing a number protruding lines in a direction almost parallel with the reciprocating movement direction of the movable edge onto a sliding face of one of the movable edge or the fixed edge and a number of protruding lines in a direction crossing the parallel direction onto the other sliding face. SOLUTION: Surfaces and backside faces of comb edge tip parts and the end edge parts in the opposite sides of a fixed edge 2 and a movable edge 1 are made mutually sliding slide faces on which a number of protruding lines 3 are constructed in parallel, respectively. The upper face of a protruding part 49 is a sliding face on which a number of protruding lines 3 are constructed in parallel. Thus, when the movable edge 1 is reciprocated sliding on the fixed edge 2, a number of protruding lines constructed on both sliding faces mutually cross and slide. At that time, a number of cut-off grooves 3a in the reciprocating direction are formed by wearing the cutting of at the tip end part of the sliding face of the fixed edge 2 and thereafter the protruding lines 3 on the sliding face of the movable edge 1 are guided by the cut-off grooves 3a to slide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric razor blade structure employed in a shaver, a hair clipper, and the like, in which a movable blade is reciprocated by electric drive and slides on a fixed blade.

[0002]

2. Description of the Related Art There has been known an electric razor blade structure in which a movable blade is reciprocated by electric drive and slidably contacts a fixed blade. In this case, the movable blade and the fixed blade are formed by punching a sheet metal or by bending the sheet metal to be a trimmer blade or a slit blade. At that time, sagging and warping of the edge due to punching are removed by grinding, and flatness adjustment and cutting edge processing are performed.
Further, the edges of the movable blade and the fixed blade and the sliding surfaces thereof are processed by lapping and co-rubbing to improve sharpness and reduce sliding noise.

[0003]

However, in the above-mentioned prior art, in order to improve sharpness and reduce sliding noise, the movable blade and the fixed blade after grinding are further provided with:
Since lapping and co-rubbing are performed, there is a problem that the processing cost is high and the cost is increased. Moreover,
In this case, since the sliding surfaces of the movable blade and the fixed blade become smooth surfaces and come into sliding contact with each other with a large contact area, resistance at the time of sliding contact increases, and a large load is applied to the reciprocating movable blade. In addition, there is a problem that the movable blade is easily displaced and moved relative to the fixed blade in a direction perpendicular to the reciprocating direction of the fixed blade.

SUMMARY OF THE INVENTION The present invention has been made to solve all the problems in the prior art described above, that is, the problem is that the movable blade is smoothly reciprocated so as not to move relative to the fixed blade. An object of the present invention is to provide an electric razor blade structure in which noise generation is prevented.

[0005]

An electric razor blade structure according to a first aspect of the present invention is an electric razor blade structure in which a movable blade is reciprocated by electric drive and slidably contacts a fixed blade. On one sliding contact surface of the blade, a number of ridges in a direction substantially parallel to the reciprocating motion direction of the movable blade are arranged in parallel, and on the other sliding contact surface, a number of ridges in a direction intersecting the above direction are arranged in parallel. .

In this case, when the movable blade reciprocates and slides on the fixed blade, a large number of ridges arranged side by side intersect and slide against each other on the sliding contact surface of the movable blade. A notch groove is formed in the same direction as the reciprocating motion direction, which is rubbed and cut off at the top end of the ridge on one of the sliding contact surfaces,
Thereafter, the ridge on the other sliding contact surface slides while being guided by the notched groove.

Therefore, since the movable blade and the fixed blade come into sliding contact only at the intersection of the ridges on the sliding contact surface, the contact area at the time of sliding contact is reduced, and the movable blade reciprocates with less frictional resistance. Exercise. In addition, at this time, the ridge on the other sliding contact surface slides while being guided by the notch groove formed on the ridge on one sliding contact surface, so that the movable blade smoothly reciprocates so as not to move. The movable blade is also moved, and hence the generation of noise due to the reciprocating movement of the movable blade is also prevented.

According to a second aspect of the present invention, in the electric razor blade structure according to the first aspect, a large number of ridges are juxtaposed by grinding the sliding contact surface. And Therefore, in this case, in particular, when the movable blade or the fixed blade is being ground, a large number of ridges can be formed side by side on the sliding contact surface by the grinding at the same time. Cost can be reduced.

According to a third aspect of the present invention, there is provided an electric razor blade structure according to the first or second aspect, wherein the ridges are formed in a sharp cross-sectional mountain shape. Therefore, in this case, particularly, since the tips of the sharp ridges having a mountain-shaped cross section cross each other and are slid in contact with each other,
A notch groove is quickly formed at the intersection, and the contact area at the intersection is further reduced, so that a smoother reciprocating motion of the movable blade without generating noise can be obtained quickly from the beginning. Will be.

The electric razor blade structure according to a fourth aspect of the present invention is the electric razor blade structure according to any one of the first to third aspects, wherein the ridges on both sliding contact surfaces are arranged in a direction perpendicular to each other. It is characterized by being formed in. Therefore, in this case, in particular, the ridges intersecting and sliding in contact with each other are in directions orthogonal to each other, so that the notch groove is easily formed at the intersection and the contact area at the intersection is also minimized, and Optimal reciprocating motion that is smooth and free of noise can be obtained.

According to a fifth aspect of the present invention, there is provided an electric razor blade structure according to any one of the first to fourth aspects, wherein a groove portion between the ridges is filled with a lubricating material. It is characterized by the following. Therefore, in this case, in particular, since the lubricating material is filled in the grooves between the ridges, the lubricating material intervenes between the ridges that are in sliding contact with each other, thereby providing a smoother, noise-free sliding. Is obtained.

An electric razor blade structure according to a sixth aspect of the present invention is the electric razor blade structure according to any one of the first to fifth aspects, wherein an oil reservoir recess is formed on the sliding contact surface. And Therefore, in this case, in particular, by storing the lubricating oil in the oil reservoir concave portion formed on the sliding contact surface, an increase in frictional resistance due to oil shortage is prevented, and smoother, noise-free sliding is maintained for a long time. can do.

[0013]

1 and 2 show a first embodiment of the present invention.
4 shows an embodiment corresponding to FIG. 4, in which an electric razor blade structure in which the movable blade 1 is reciprocated by electric drive and comes into sliding contact with the fixed blade 2, and has a sliding contact surface with the movable blade 1. A large number of ridges 3 in a direction substantially parallel to the reciprocating motion direction of the movable blade 1 are arranged side by side, and a large number of ridges 3 in a direction intersecting the above direction are arranged in parallel on the sliding contact surface of the fixed blade 2.

In this case, a number of ridges 3 are juxtaposed by grinding the sliding surfaces of the movable blade 1 and the fixed blade 2.
The protruding ridges 3 are formed in a sharp mountain-shaped cross section, and the ridges 3 on both sliding contact surfaces are formed in directions perpendicular to each other. or,
The average grinding roughness of each sliding contact surface on which a large number of the ridges 3 are arranged is 0.125 to 0.75a in terms of center line average roughness.

Each of the movable blade 1 and the fixed blade 2 has one side edge serving as a blade edge portion formed in a comb shape. In FIG. 1, the movable blade 1 is formed so as to correspond to the comb-shaped edge. It is inverted and polymerized on the fixed blade 2. In addition, fixed blade 2 and movable blade 1
The front and back surfaces of both the comb tooth-shaped cutting edge portion and the opposite edge portion are sliding contact surfaces that are in sliding contact with each other, and a large number of convex strips 3 are arranged in parallel on the sliding contact surface. In addition, a plurality of protrusions 49 described later are provided on an edge portion of the fixed blade 2 opposite to the blade edge portion.
The upper surface of the convex portion 49 serves as a sliding contact surface, and a large number of the ridges 3 are arranged on the sliding contact surface.

Therefore, in this case, as shown in FIG.
When the movable blade 1 reciprocates and slides on the fixed blade 2, a large number of ridges 3 arranged side by side intersect with each other and slide on the sliding contact surfaces of the two. A large number of notched grooves 3a are formed in the same direction as the reciprocating motion direction, which is rubbed and cut off at the top end of the ridge 3 of the slidable contact surface 2 and thereafter the movable blade 1 is guided by the notched grooves 3a. , Each of the ridges 3 on the sliding contact surface slides.

Also, the electric razor blade structure of the embodiment is as follows:
As shown in FIGS. 3 to 10, the shaver is used for a trimmer blade T of the shaver, and the shaver will be described in detail below.
As shown in FIG. 3, the shaver is formed such that an outer blade 6 formed as a mesh blade having a number of blade holes and a number of inner blades 7 are implanted on an inner blade base 8. The fixed blade 2 in the form of a comb is provided on both sides of the main blade M comprising
And the movable blade 1 are formed as trimmer blades T.

As shown in FIG. 4, the outer blade 6 of the main blade M not only curves in the direction Y perpendicular to the reciprocating direction X of the inner blade 9 but also in the reciprocating direction X of the inner blade 9. It is curved and is attached to an outer blade frame 10 formed in a rectangular frame shape. This mounting is performed by mounting a plurality of mounting bosses 11 protruding from the outer blade frame 10 to mounting holes provided on both sides of the outer blade 6.
This is done by inserting into 12. At this time, only the mounting bosses 11 inserted into the mounting holes 12 located at both ends of the outer cutter 6 in the reciprocating motion direction X of the inner cutter 9 are heat caulked. The outer cutter frame 10 to which the outer cutter 6 is attached as described above has elastic members 13 integrally formed at both ends in the longitudinal direction, the lower ends of which are directed outward, and has flat portions 14 on both upper surfaces. , Attached to the blade frame 15.

The inner blade 9 is reciprocated by a driver 16 shown in FIG. The middle part in the vertical direction is pivotally supported by a pin 17 so that it can swing freely.
The drive element 16 is provided with a cam groove 20 at the lower end thereof for engagement with an eccentric shaft 19 with a balancer attached to the output shaft and the inner blade 9 is connected to the upper end. Rocks.

As shown in FIG. 6, the connection between the driver 16 and the inner blade 9 is made by connecting the inner blade 9 to the upper end of the driver 16 having a cylindrical shape and a compression coil spring 21 housed therein. Insert the connecting boss 22 protruding from the base 8 and connect the connecting boss
Locking is performed between an engaging portion 23 protruding on both sides of the 22 and a hook 24 provided at an upper end portion of the driver 16. At this time, the engaging portion 23 And the inner blade 9 is slidable within a predetermined range in the axial direction of the driver 16. Therefore, in this case, when the motor 18 is rotated, the inner blade 9 of the main blade M reciprocates along an arc-shaped locus along the inner surface of the outer blade 6.

Next, a pair of trimmer blades T provided on both sides of the main blade M will be described. As shown in FIG. 7, the trimmer blade T includes a base 26, a fixed blade 2 fixed to the curved upper surface of the base 26 by fitting with a fitting protrusion 27, and an upper surface of the fixed blade 2. The movable blade 1 is disposed on the side and is slid and guided by the fitting protrusion 27, a pressing spring 28 for pressing the movable blade 1 toward the fixed blade 2, and a cover 29. The pressing spring 28 has a vertical flat plate 30
When the cover 29 is attached to the base 26 by the hooks 32, the vertical flat plate portion 30 is held and fixed between the cover 29 and the base 26, The spring pieces 33 are brought into contact with the upper surface of the movable blade 1.

The base 26 has a pair of outer locking pieces 34, a pair of middle hook pieces 35, and a pair of inner locking pieces facing downward.
36, and a pair of thin elastic pieces in the center
As shown in FIG. 8, the trimmer driving element 38 supported by 37 is provided with two pairs of locking portions 39 and 40 formed on the inner wall surface of the blade frame 15 in the short direction. Tab 3
4. The trimmer driver 38 is supported by the support shaft 41 while the inner locking piece 36 is inserted, so that the trimmer driver 38 is attached to the blade frame 15.

However, as shown in FIG. 3, a support shaft 41 that supports the trimmer driver 38 of one of the trimmer blades T of the two trimmer blades T is a slide button 42 that is slidably mounted on the blade frame 15 up and down. The locking portion
In addition to the fact that the engagement between 39, 40 and the outer locking piece 34, the inner locking piece 36 is slidable up and down, the slide button
With the vertical slide of 42, one trimmer blade T also slides up and down.

The lower end of the trimmer driver 38, the upper end of which is an engaging portion 43 that engages with the movable blade 1, engages with a driving projection 44 provided on the driver 16 to allow the driver 16 to move. The engaged portion 45 is a portion where the movement is transmitted to the trimmer driver 38.
When the driver 16 swings, the trimmer driver 38
The movable blade 1, which is also formed in a comb-tooth shape, reciprocates and slides with respect to the fixed blade 2 formed in a comb-tooth shape. Note that the engaging portion 43 and the engaged portion 45 are located on the same vertical line, so that the trimmer driver 38 is hardly twisted.

Further, the trimmer blade T here cuts the hair in cooperation with the main blade M, that is, the long hair is handled by the trimmer blade T, and the short hair after being cut by the trimmer blade T is used as the main blade M.
The main blade M is curved in the reciprocating direction of the inner blade 9 in the same manner as the main blade M so that the operation of cutting shorter can be performed smoothly.

By the way, when the fixed blade 2 and the movable blade 1 are curved in the sliding direction, it is difficult to bring the movable blade 1 into close contact with the fixed blade 2 with no gap in the entire area.
As shown in FIG. 9A, when the radius of curvature of the movable blade 1 is smaller than the radius of curvature of the fixed blade 2, when assembled, that is, when the movable blade 1 is pressed against the fixed blade 2, The movable blade 1 is in close contact with the fixed blade 2.
When the movable blade 1 is formed, as shown in FIG. 9B, the movable blade 1 is formed so as to have a convex bending shape in the cross section in the same manner as the fixed blade 2 and is curved.
As shown in (c), by grinding the lower surface so as to be flush, the rigidity of the movable blade 1 in the reciprocating motion direction is reduced, and the close contact with the fixed blade 2 is ensured.

Further, the cutting edge of the movable blade 1 is shown in FIG.
As shown in the figure, since the movable blade 1 is pressed against the fixed blade 2, the movable blade 1 is in close contact with the fixed blade 2 from the blade edge side when the movable blade 1 is pressed against the fixed blade 1, and a good sharpness is obtained. It is something that can be done. Since the fixed blade 2 side is configured to leave a convex shape in its cross section, the fixed blade 2
There is no increase in drive load due to friction between the movable blade 1 and the movable blade 1.

Here, the trimmer blade T is provided with a groove 46 on the upper surface of the fixed blade 2 as shown in FIG.
Notches 48 leading to the grooves 46 are provided at intervals on the edge opposite to the cutting edge 47, and the notch 48 on the edge opposite to the cutting edge 47 of the fixed blade 2 is interposed between the upper surface of the fixed blade 2 on the side opposite to the cutting edge 47. The movable blade 1 is slidably contacted only with the upper surface of the convex portion 49 provided. That is, as shown in FIG. 1, a large number of ridges 3 are juxtaposed on the sliding contact surface by reducing the sliding contact surface with the movable blade 1. The convex portion 49 is provided with a spring piece 33 of the holding spring 28.
In order to prevent deformation of the movable blade 1 due to pressing.

Therefore, in the electric razor blade structure of this embodiment, as shown in FIG.
Means that the sliding surface is in sliding contact only at the intersection of the ridges 3 with each other, so that the contact area at the time of sliding contact is small, and the movable blade 1 is reciprocated with little frictional resistance. In addition, at this time, while being guided by the notch groove 3a formed on the ridge 3 of the sliding contact surface of the fixed blade 2, the ridge 3 of the sliding contact surface of the movable blade 1 is guided.
Is moved, the movable blade 1 is smoothly reciprocated so as not to be displaced, and therefore, generation of noise accompanying the reciprocating movement of the movable blade 1 is also prevented. Further, when the movable blade 1 and the fixed blade 2 are being ground, a large number of ridges 3 are formed side by side on the sliding contact surface by the grinding.
Subsequent lapping and co-rubbing are omitted, and costs associated with processing the movable blade 1 and the fixed blade 2 can be reduced.

In the electric razor blade structure of the present embodiment, the tips of the sharp ridges 3 each having a sharp mountain cross section cross each other and slide in contact with each other. 3a is formed, and the contact area at the intersection is further reduced, so that a smoother reciprocating motion of the movable blade 1 without generating noise can be quickly obtained from the beginning. In addition, in this case, since the ridges 3 that intersect and slide are in the directions orthogonal to each other, the notch grooves 3a are easily formed at the intersections, and the contact area at the intersections is minimized. It is possible to obtain an optimal reciprocating motion that is smooth and does not generate noise.

FIG. 11 shows another embodiment corresponding to claims 1 to 4 of the present invention. In the electric razor blade structure according to this embodiment, the movable blade 1 reciprocates on the sliding contact surface of the fixed blade 2. A large number of ridges 3 in a direction substantially parallel to the
A large number of ridges 3 in a direction intersecting with the above-mentioned direction are arranged side by side on the sliding contact surface. Except for this, the configuration is exactly the same as that of the above-described embodiment, and the same operation and effect as in the above-described embodiment can be obtained.

FIG. 12 shows still another embodiment corresponding to claims 1 to 5 of the present invention. In the electric razor blade structure of this embodiment, a lubricating material 4 is provided in a groove portion between the ridges 3. Is filling. In this case, the lubricating material 4 is filled between the ridges 3 of the sliding surfaces of the movable blade 1 and the fixed blade 2, but the lubricating material 4 is filled between the ridges 3 of only one of the sliding surfaces. May be filled. The lubricating material 4 is, for example, a fluororesin which is filled by coating.

Therefore, in the electric razor blade structure of this embodiment, the lubricating material 4
Is filled, the lubricating material 4 is interposed between the ridges 3 which are in sliding contact with each other, so that smoother sliding without noise is obtained. Further, in this case, the lubricating material 4 is filled in the groove between the ridges 3 and does not peel off. Otherwise, the configuration is exactly the same as that of the embodiment shown in FIGS. 1 and 2, and the same operation and effect as in the embodiment shown in FIGS.

FIG. 13 shows still another embodiment corresponding to claims 1 to 4 and 6 of the present invention. In the electric razor blade structure of this embodiment, both sliding contact of the movable blade 1 and the fixed blade 2 is performed. An oil reservoir recess 5 is formed on the surface. In this case, the slidable contact surface on the back surface of the edge portion of the movable blade 1 opposite to the blade edge portion, the back surface of the fixed blade 2 near the blade edge portion, and the convex portions 49 formed on the back surface of the edge portion on the opposite side. A long groove-shaped oil reservoir recess 5 which is long in the same direction as the reciprocating motion of the movable blade 1
The oil reservoir recess 5 may be formed on the sliding surface of only one of the movable blade 1 and the fixed blade 2.

Therefore, in the electric razor blade structure of the present embodiment, in particular, the oil reservoir recess 5 formed on the sliding contact surface
By storing the lubricating oil, an increase in frictional resistance due to lack of oil can be prevented, and smoother and noiseless sliding can be maintained for a long time. Also, in the electric razor blade structure of this embodiment, the lubricating material 4 may be filled in the groove between the ridges 3 as in the embodiment shown in FIG. Other than that, FIG.
The configuration is exactly the same as the embodiment shown in FIG. 1, and the same operation and effect as in the embodiment shown in FIG.

[0036]

As described above, in the electric razor blade structure according to the first aspect of the present invention, the contact area at the time of sliding contact is reduced, and the movable blade is reciprocated with less frictional resistance. The movable blade is reciprocated smoothly so as not to move, thereby preventing generation of noise.

Further, in the electric razor blade structure according to the second aspect of the present invention, particularly when the movable blade or the fixed blade is being ground, a large number of ridges are formed on the sliding contact surface by the grinding. Can be formed side by side, so that the cost of the movable blade and the fixed blade can be reduced.

Further, in the electric razor blade structure according to the third aspect of the present invention, the notch groove is formed immediately at the intersection, and the contact area at the intersection is further reduced. In addition, smoother reciprocating motion of the movable blade without generating noise can be obtained quickly from the beginning.

In the electric razor blade structure according to the fourth aspect of the present invention, in particular, since the ridges which are in sliding contact with each other are orthogonal to each other, notch grooves are easily formed at the intersections and the contact area at the intersections is increased. And the optimum reciprocating motion of the movable blade without noise and with no noise can be obtained.

In the electric razor blade structure according to the fifth aspect of the present invention, in particular, the lubricating material filled in the grooves between the ridges intervenes between the ridges which are in sliding contact with each other. Smooth, noise-free sliding is obtained.

Further, in the electric razor blade structure according to the sixth aspect of the present invention, the lubricating oil is stored in the oil storage recess formed on the sliding contact surface, so that the frictional resistance due to oil shortage increases. Thus, smooth and noise-free sliding can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of an electric razor blade structure according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a main part of the electric razor blade structure.

FIG. 3 is a lateral cross-sectional view showing a main part of a shaver employing the electric razor blade structure.

FIG. 4 is an exploded perspective view showing a main blade of the shaver.

FIG. 5 is an exploded perspective view showing a driving mechanism of the shaver.

FIG. 6 is a longitudinal sectional view of a main blade portion of the shaver.

FIG. 7 is an exploded perspective view showing a trimmer blade having the electric shaver blade structure of the present invention in the shaver.

FIG. 8 is a longitudinal sectional view of a trimmer blade portion of the shaver.

FIG. 9A is a cross-sectional view showing the relationship between the radius of curvature of the movable blade and the fixed blade in the electric razor blade structure, FIG. 9B is a cross-sectional view showing the state of the movable blade before grinding, and FIG. () Is a cross-sectional view showing the state after grinding of the movable blade.

FIG. 10 is an exploded perspective view showing details of a main part of a trimmer blade having the electric razor blade structure of the present invention in the shaver.

FIG. 11 is an exploded perspective view showing a main part of an electric razor blade structure according to another embodiment.

FIG. 12 is an enlarged perspective view showing a main part of an electric razor blade structure according to still another embodiment.

FIG. 13 is an exploded perspective view showing a main part of an electric razor blade structure according to still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable blade 2 Fixed blade 3 Ridge 4 Lubricious material 5 Oil reservoir recess

Claims (6)

[Claims] An electric razor blade structure in which a movable blade is reciprocated by an electric drive and slidably contacts a fixed blade, wherein the movable blade or one of the fixed blades has a sliding surface substantially parallel to a reciprocating motion direction of the movable blade. An electric razor blade structure in which a number of ridges in the direction are arranged side by side, and a number of ridges in the direction intersecting the direction are arranged in parallel on the other sliding contact surface. 2. The electric razor blade structure according to claim 1, wherein a large number of ridges are juxtaposed by grinding the sliding surface. 3. The electric razor blade structure according to claim 1, wherein the ridges are formed in a sharp cross section. 4. The electric razor blade structure according to claim 1, wherein the ridges on both sliding contact surfaces are formed in directions orthogonal to each other. 5. The electric razor blade structure according to claim 1, wherein the groove between the ridges is filled with a lubricating material. 6. The electric razor blade structure according to claim 1, wherein an oil reservoir recess is formed on the sliding contact surface.