JPS5964088A - 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 The present invention relates to an electric shaver, in particular, a fixed blade having a comb-like cutting edge, a movable blade having a comb-like cutting edge and being driven to slide back and forth with respect to the fixed blade. This invention relates to an electric shaver equipped with a presser spring that applies contact pressure between a movable blade and a fixed blade.

FIG. 1 shows an example of this type of electric shaver.

In the figure, (21) is the main body housing, and inside this elongated cylindrical main body housing brake 1) is the Tanabata 8! A battery and a battery +231 are stored, and the output shaft (2
4) is attached with an output joint positioned within the upper end opening of the main body housing brake l). The attachment (28) whose lower end is inserted and connected to the upper end of the main body housing (21+) is connected to the output joint (to) in the lower end of the attachment (28) and is connected to the input joint (to which the rotation of the t-tater (221) is transmitted).
Equipped with □, installed on the upper end of the eccentric shaft (input fitting center).
- The upper end s of the attachment 26 has a fixed blade that engages with the round-shaped cam side 9) and swings around the shaft head due to the revolving movement of the cam side 9). f
il, a movable blade (2), and a presser spring (3) are arranged as a head part, and a link (30) has a spherical shape s (3 functions are held together) at the upper end of the connecting seat eα hanging from the movable blade (2). The movable blade (2) is driven to reciprocate and slide relative to the fixed blade +11 by the swinging of the link (30). C3 (1) is a cover as a removal member, and i3 is a long beard. The hair is styled and guided to a cutting section formed by the comb-like cutting edges of a fixed blade (1) and a movable blade (2).

Now, this type of electric razor has a high efficiency in cutting long and thin hair, and is therefore suitable for shaving women's unwanted hair, but it has a net-shaped fixed blade and a movable blade that slides on the inner surface of the fixed blade. Compared to electric razors, it is inferior in terms of structural strength and the inability to reduce the thickness of the fixed blade, resulting in shorter shavings (unwanted hair). FIG. 2 shows an enlarged sectional view of the cutting part, and the arrows in the figure indicate the relative movement direction of the skin S when shaving while moving the electric razor. The whisker M is located between the fixed blade (1) and the movable blade (2).
11) (Rather than the chance of being cut immediately after being introduced into 121, the beard M will be t41y by ΔL before being cut, and the fixed blade +1+ and the blade vI of the movable blade (2) (at the back of the river (12) Even if the movable blade (2) with a blade thickness t2, which is thinner than the blade thickness t1 of the fixed blade 11), is placed on the skin S side, the movable blade (2) has a short shave l.
The thickness is considerably longer than the thickness δ2.

In terms of pressing force against the skin S, the sliding of the fixed blade fil and the movable blade (2) is also important! Iil] The distance 1 from the contact surface (cutting surface) to the skin S is the thickness δ2 of the movable blade (2) as shown in Figure 3.
Although it can be made a little shorter than that, it is still not satisfactory, especially at the tip of the double-edged light of the fixed blade (1) and movable blade (2), and the deep part of the blade groove +n+oz+ where there are the most cutting opportunities. In , the thickness of the movable blade (2) δ
2. It's quite long. Further, if the thickness δ2 of the movable blade (2) is made too thin, the strength cannot be ensured and the skin S will be irritated. Moreover, as shown in Fig. 4, each blade groove (0) f of the fixed blade fi+ and the movable blade (2)
+2) usually has a wide opening and narrows at the back, but the double-edged groove (I-12) has a double-edged groove (I). ) and the tip of the sink mark M falls due to the slip of ΔLO in the figure, resulting in a short shaved length δ0
may become quite long.

In view of these points, it has been proposed to provide a hair tension member (4) as shown in FIG. If the movable blade (2) is located on the skin S side, the fixed blade +1 +
A fixed blade (fl)K and a sink tension member (4) pressed by a spring force are arranged on the other surface of the blade that is not in contact with the movable blade (2). Similar to the cutting edge of the fixed blade (1) and the movable blade (2), the tip is a comb-shaped cutting edge, and this cutting edge is placed below the cutting edge of the fixed blade (2), and the movable blade ( 2)
This sink tension member (4) is configured to reciprocate with the
), the blade edge bites into the beard M just before cutting the beard M between the movable blade (2) and the fixed blade +11, and due to the beard M existing between the movable blade (2) and the fixed blade (2). The whisker tensioning member (4) moves away from the fixed blade (2) against the spring bias. By this action, the whisker tensioning member (4) pulls the whisker M and identifies the root of the whisker M between the blade (1) and the movable blade +21 (!
: is brought close to the cutting surface which is the sliding contact surface of each blade edge, and the shortness δ1 of the finished shave is made extremely short.

However, even in this case, the following problems still remain. That is, in order for the whisker tension member (4) to be able to pull the sink mark M, the cutting edge of the whisker tension member (4) must be embedded in the whisker M. Therefore, the whisker M can be cut extremely short. However, only those having a length of 4 or more are approximately equal to the sum of the thicknesses t1 and t2 of the fixed blade fil and the movable blade (2). A beard M having a length less than t cannot be expected to be affected by the beard tensioning member (4), and it is not possible to make the length of the shaven hair M short and uniform after shaving.

This invention was invented in consideration of these points, and its purpose is to provide an electric razor that can uniformly and shorten the length of the beard.

To explain the present invention below, the present invention provides an electric shaver equipped with a fixed blade and a movable blade each having a HFC comb-like cutting edge in which the blade grooves are arranged in rows. It is characterized in that both the fixed blade and movable power running cutting edges are provided with hair movement prevention means for preventing the t-movement of the hair being cut, and the sink movement prevention means is provided with the blade of the fixed blade or the movable blade. Because it is located in the groove, when the electric razor moves relative to the skin when shaving, the button beard goes deep into the blade groove, and the beard is pulled and the root of the beard is cut into the two cutting edges of the fixed blade and movable blade. The beard is cut close to the cutting edge surface, which is the sliding contact surface of the blade, so that the shortness of the finished shave can be seen. The present invention will be described in detail below based on the embodiments shown in the drawings. FIGS. 6 to 9 show an embodiment of the present invention, and in the figures, 11 is a stopper (351) in which the arc-shaped tip is a comb-like cutting edge. (34) is a fixed blade fixed to the blade, (2) is a movable blade whose arc-shaped tip has a comb-like cutting edge, and has the above-mentioned connecting seat (20) on the lower center surface. ) and the fixed blade fil so as to be able to slide freely relative to the fixed blade (1), and further between the cover (34) and the movable blade (2). A tensioning member (as a sink movement prevention means) made of a metal material such as stainless steel presses the blade (2) and applies contact pressure between the fixed blade +1) and the movable blade (2). 4) is a friend in which the arcuate tip has a comb-like shape with narrow protrusions (5) arranged in a row,
The width of these protrusions (5) is the same as the blade groove (11) of the fixed blade (11).
) and curved upwards. Then, it is fixed to the lower surface of the fixed blade +11 by a joining means such as welding, and each protruding piece (6) of the cutting edge is located in the blade groove (inside) of the fixed blade fl), and in particular, the tip of each protruding piece (6) Fixed blade +
11 and the movable blade (2) are brought close to the cutting edge surface which is the sliding contact □ surface of both cutting edges, and the distance between the two is set to a minute dimension ΔH.

In this configuration, the movable blade (2) is arranged on the skin S side,
When cutting the sink mark M while moving it along the skin S, the whisker M is introduced into the blade groove (11) 021 with the fixed blade fl) (!: movable blade (2)) as shown in Fig. 8(a). At this point, the cutting edge of the tip of the whisker tension member (4) sinks into the whisker M, and during the relative movement of ΔL in the figure, the sink mark M appears from the cutting edge surface of the upper surface of the fixed blade (it) and the lower surface of the movable blade (2). Instead of escaping, it is pulled in the opposite direction and approaches the cutting surface. Moreover, in this embodiment, the protruding piece (5) of the hair tensioning member (4) is made elastic, and the inner wall of the blade groove (11) of the fixed blade fi+ is made into an inclined surface (9). As shown in FIG. 8(b), the relative movement ΔL of the skin S causes the slope (9) of the protrusion (5) to move fc, and the movement of the protrusion (5) further pulls the beard M. Bring the base of the sink M closer to the blade surface. Since the sink mark M is cut in this state, an extremely short shaved length al can be obtained. As shown in FIG. 9, a part of the whisker M introduced into the blade groove (II>
) There is no movement of the sink mark M due to < 1+, -, or slippage between the side edges. Also, the whiskers M pulled by the whisker tensioning member (4) in this way are shown in Fig. 8 (
As is clear from a), it is sufficient if the length t is approximately equal to the blade thickness t2 of the movable blade (2), and if the length is longer than this, the blade can be surely pulled by the hair tensioning member (4). It is cut and finished short in the following state.

Niobium carbide (NbC) is used as the whisker tension member (4).
) type cermet or ceramic may be used. In this case, it is not possible to make the protruding piece (5) elastic, but even if the protruding piece (6) does not have elasticity, the whiskers M move upward during the relative movement of the skin S obliquely upward with respect to the cutting surface. Since movement can be prevented, even in this case, the shortness of the finished shave can be made approximately equal to the blade thickness of the tip of the movable blade +11.

Other embodiments are shown in Fig. 1θ and Fig. 11. This is an example in which the fixed blade (1) is placed on the skin S side,
The rear end of the beard tensioning member (4) is fixed to the upper surface of the movable blade (2) located below the fixed blade fi+, and once the beard tensioning member (4) is inserted through the window (IO) provided in the movable blade (2). ) is guided below the movable blade (2), and the protruding piece (5) serving as the cutting edge is positioned within the blade groove 0= of the movable blade (2). Note that this embodiment is provided in an attachment different from that shown in FIG. 1, and the cutting edges of the movable blade (2) and fixed blade f1) are positioned on the side surface of the attachment. To this friend, a connecting seat &01 is formed at one end of the movable blade (2).

Next, an embodiment will be shown in which the sink movement preventing means is not formed as the hair pulling member (4) but is formed integrally with the fixed blade (1) or the movable blade (2). Figure 12 shows the fixed blade + 11 blade grooves (
This is an example in which a sink movement prevention means is provided on the inner wall of 11).

Which blade groove (11) of the fixed blade (11) and the movable blade (2)
(This sink movement prevention means may be provided at 12+, but as shown in FIG. The configuration is as follows: (71 fixed blades (11 and 2 movable blades)
] ,! : is a different entity from the cutting edge (8) when cutting the beard M, and the gill, ; +71 is a curved line along the uneven surface (6), but the cutting edge (8) maintains a straight line by forming the uneven surface (6) so that it does not overlap the cutting edge (8). The position of the edge (7) can be as shown in FIG. 14 or 15. However, as shown in FIG. 16 and FIG.
The whisker M gets caught and is prevented from moving, and as a result, the whiskers M are pulled. Moreover, the existence of the uneven surface (6) causes the whiskers M
This reduces the amount of slip ΔL□, and furthermore, since the gill ``:r +7) also forms a curved line due to the uneven surface (6), as is clear from Fig. 16(c), the gill ``i''
Since +71 bites into the whisker M at two points and gets caught, it will definitely pull the whisker M,
By reducing the tensile action and sliding amount ΔL of the sink mark M, the shortness al of the finished shave of the sink mark M can be shortened. Here, as mentioned above, cut the cutting edge (8) with the uneven surface (6).
) The reason why the cutting edge (8) is a straight line is because if the cutting edge (8) is curved, interference will occur between the fixed blade fil and the movable blade (2), and the cutting edge (8) will be straight. This is because the wear will become severe, and the cutting edge (7) should not be replaced with the cutting edge (7).
8) The reason for this distinction is that the cutting edge (8), which is prone to wear, is also given the function of the edge (7), which takes on the tensile action of the sink marks M, so that the pulling action of the whiskers is not caused by wear. This is because if you cannot obtain it early, you will run out of money.
This ensures that a good hair tensioning effect can be obtained over a long period of time.

Other examples are shown in FIG. 18 and below. This means that the sink movement prevention means having the above structure is integrally provided on the inner wall of the blade groove (II) (+21) of the fixed blade (1) or the movable blade (2). ) is provided in the part continuous with the cutting edge (8).As shown in Fig. 20, the gill; (7)
The position may be provided anywhere in the thickness direction. In this way, when the uneven surface (6) and the edge (7) are integrally formed on the inner wall of the blade groove (■) or the blade groove (12J), they are perpendicular to the direction of relative movement of the skin S to prevent sink movement. Since the means exists, the effect of catching and pulling the sink mark M can be obtained more reliably.

Furthermore, when the sink movement prevention means is integrally provided on the inner wall or deep wall of the blade groove (11) or the blade groove 021, the fixed blade f1) or the 21st blade located on the skin S side
When provided on the movable blade (2) as shown in the figure, the distance between the skin S and the sink movement preventing means is short, and therefore the hair M can prevent the sink movement preventing means from pulling and scratching.
This is advantageous in that the minimum length of is shortened. Short sink M
'ft can be made even shorter. Furthermore, when a sink movement prevention means is provided integrally with the fixed blade (1) or the movable blade (2), the fixed blade or the movable blade (2),
Alternatively, both may be formed of niobium carbide (NbC)-based cermet or ceramic. These materials are characterized by high hardness and abrasion resistance, and can be molded into a mold. 7)
The sharpness of the cutting edge (8) can be maintained and the function as a sink movement prevention means and cutting function can be exhibited,
It is possible to easily obtain a sink movement prevention means constituted by the uneven surface (6) and the edge (7).

As described above, in the present invention, preventing the movement of the beard by the sink mark movement preventing means causes the beard to be pulled, thereby reducing the shortness of the finished shave. Since it is provided within the blade groove of the blade or movable blade, the length of the whiskers that can be caught by the sink mark movement prevention means is also short, and all the whiskers can be finished short.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an example of an electric shaver equipped with a fixed blade and a movable blade with comb-like cutting edges, Fig. 2 is a longitudinal sectional view of the main part of the conventional example, and Fig. 3 is a cross-sectional view of the main part of the same. Front view, Figure 4(a)
(b) is a plan view and a vertical cross-sectional view of the main part showing the same effect as above, FIGS. Exploded perspective views of one embodiment, FIGS. 7(a) and 7(b) are the same A-λ line and B-
B-line vertical sectional view, Figure 8) (b) is a longitudinal cross-sectional view showing the same effect as above, Figure 9 is a plan view of the main part of the same as above, Figure 10 is an exploded perspective view of another embodiment, Figure 11 The figure is a vertical cross-sectional view of the same as above, No. 12
The figure is an exploded perspective view of another embodiment, FIG. 13 is an enlarged perspective view of the main part, FIGS. 14 and 15 are sectional views taken along line C-C showing different examples, and FIG. 16(a) (b) (c) is a plan view, longitudinal cross-sectional view, and horizontal cross-sectional view of the main parts showing the same effect as above, FIG. 17 is a cross-sectional view showing the same effect as above, and FIG.
a) (b) is an enlarged perspective view of main parts of another embodiment and D-D
A line sectional view, FIG. 19 is a vertical sectional view of the same as above, FIG. 20 is a partial sectional view showing the other side of the same, FIG. 21 is a vertical sectional view of yet another example, (1) is a fixed blade, ,,', +21 indicates a W moving blade, (4) a barbed tension member, (6) an uneven surface, and (7) an edge. Agent Patent Attorney Ishi 1) Long 7 (b) 1 Figure 20 648-

Claims (9)

[Claims] (1) A Ringoho sword that has a comb-tooth-shaped cutting edge with a row of blade grooves, and a movable blade that has a comb-tooth-shaped cutting edge that has a row of blade grooves and is driven to slide back and forth with respect to a fixed blade. In addition, it is characterized by comprising sink mark movement prevention means for preventing movement of the whiskers that are located in the blade groove of the cutting edge of the fixed blade or the movable blade and are cut by both the blade edges of the fixed blade and the movable blade. An electric razor. (2) The electric shaver according to claim 1, wherein the sink movement preventing means is disposed close to the sliding contact surfaces of both cutting edges of the fixed blade and the movable blade. (3) The electric shaver according to claim 1 or 2, wherein the sink mark movement preventing means is constituted by a hair tensioning member having a comb-like cutting edge. (4) Claim 1 or 2, characterized in that the sink movement prevention means is composed of an edge and an uneven surface that are integrally provided on the inner wall of the blade groove of the fixed blade or the movable blade. Electric shaver as described in section. (5) Claim 1, characterized in that the sink movement prevention means is constituted by an edge and an uneven surface that are integrally provided on the inner wall of the blade groove of the fixed blade or the movable blade. Or the electric shaver described in paragraph 2. (6) The electric shaver according to any one of claims 1 to 3, wherein the sink mark movement preventing means is made of an elastic material. (7) The electric shaver according to any one of claims 1 to 5, wherein the sink mark movement preventing means is made of cermet or ceramic. (8) The electric shaver as set forth in claim 4 or 5, wherein the sink mark movement preventing means is provided on the fixed blade. (9) The electric shaver according to claim 4 or 5, wherein the sink movement preventing means is provided on the movable blade.