JPS615870A - Rotary type 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 improvements in electric shavers, and is particularly effective for rotary electric shavers.

[Prior art]

Regarding the rotary electric oven 9, many inventions and ideas have been made in the past, but almost none have been put into practical use. This is because it is difficult to manufacture a perfectly cylindrical outer cutter, and even if it could be manufactured, there would be problems in storing the beard scraps.

In addition, from this point of view, a configuration has been proposed in which the outer cutter is made of a flat plate, mounted in a U-shape, and the inner cutter slides on the inner surface of the plate, but in this case as well, contact between the inner cutter and the outer cutter is There were problems such as interference between the inner cutter and outer cutter at the beginning.

〔the purpose〕

The present invention aims to solve these problems and quickly put into practical use a rotary type electric shaver that uses an outer cutter with a U-shaped mounting shape.[Summary] Improves the smoothness of the contact movement between the inner and outer cutters of electric shavers, especially at the start of contact, prevents interference between the inner and outer cutters at this time, prevents vibration and noise, and improves the smoothness of the contact between the inner and outer cutters. In order to improve the adhesion of the inner cutter, and to arrange the regulating means integrally with the inner cutter, and to prevent the cutting part of the inner cutter from becoming shorter than the arrangement of the regulating means, and,
A feature is that the regulating means has multiple functions.

The conventional problems will be explained with reference to FIG.

1 is a case, 2 is an outer cutter frame to which the outer cutter 5 is fixed; case 1;
It is removably attached to the top of the. 6 is the outer cutter, which has many holes as is well known, and is made of a flat plate or
It is made in advance in a U-shaped mounting shape. Reference numeral 4 denotes an inner cutter support which is a component of the inner cutter, and pins 4α protrude from both end faces of the rotating shaft 10 in the axial direction. Reference numeral 5 denotes an inner cutter body whose both end surfaces in the axial direction are bent into an L shape, and a hole is provided in the surface, and the hole engages with the pin 4α of the inner cutter support 4. On the other hand, the other two sides are extended to form 5α and sb, and 5α in particular has a sharp tip. Although not shown, the inner cutter body 5 is in contact with the outer periphery of the inner cutter support 4, and the portion 5α has a spring property that expands in the radial direction with the pin 4α of the inner cutter support 4 as a fulcrum. has,
Although the blade attempts to rotate clockwise due to the spring force, the blade edge 5α is positioned at a position where it contacts the circle A because the sb portion contacts the outer periphery of the inner blade support. With this configuration, when the inner cutter support 4 is rotated in the left direction indicated by the arrow by a motor (not shown), the deflection of the spring corresponds to that shown in FIG. 52. The cutting edge 5α of the inner cutter body 5 slides on the inner periphery of the outer cutter 5 due to the spring force, and when a beard is introduced through the hole in the outer cutter 5, it is shaved off by cooperation with the outer cutter 3. However, this structure has the following operational problems. This is because the free shape of the cutting edge 5α of the inner cutter body 5, which is a component of the inner cutter, is in the shape of a circle A 17c g *, so the inner cutter body 5 released from the outer cutter 5 comes into contact with the outer cutter 3 again. In this case, the circle A and the outer cutter 3 come into contact at the intersection point P in a collision state. In this state, the larger the difference between the inner radius of the outer cutter 5 and the radius of the circle A, the larger the collision angle θ becomes, but generally the amount of deflection B of the inner cutter 5 is 0.5 to 2 degrees. Therefore, in this state, vibration and noise are generated during the collision at point P1, and K
In this case, the sharpness of the cutting edge of the inner blade body deteriorates significantly, making it impossible to function as an electric razor.

Furthermore, in the worst case, interference may occur between the outer cutter 5 and the inner cutter body 5, and the inner cutter may become unable to rotate or the inner cutter body 5 may be damaged. The present invention eliminates these drawbacks and provides a quiet electric shaver with good sharpness, and will be described in detail below with reference to the drawings.

〔Example〕

FIG. 1 is a sectional view from the front of a rotary electric shaver showing an example of the present invention, FIG. 2 is a left sectional view of the first cause, and FIG. 6 is a left side view of the cam 8. , FIG. 4 is a right side view of the cam 8.

In all the figures, 1 is a case, 2 is an outer cutter frame to which the outer cutter 3 is fixed, and 1 is attached to the upper surface of the case 1 so as to be slidable in the axial direction of the inner cutter. B is an outer cutter, which is a flat plate with well-known holes, or is pre-formed into a U-shape similar to the mounting shape. Reference numeral 4 denotes an inner cutter support which is a component of the inner cutter, and from both ends in the axial direction, pins 4α protrude in the same direction. Further, a stepped hole is provided in the center, and a hole having a corner in cross section is provided particularly near the right end. Reference numeral 5 denotes an inner cutter base constituting the inner cutter body, which is made of aluminum or resin, and holds the blade 6 together with the pusher 8. The inner cutter base 5 is curved in an L-shape near both ends, and a hole is provided in the surface, and the hole is pivotally supported by the pin 4α of the inner cutter support 4. Further, a pin 5α protrudes from one side. Reference numeral 8 denotes a cam of an inner cutter regulating means which is axially engaged with a portion 4b coaxial with the rotation center axis of the inner cutter support 4 on one end surface side of the inner cutter support 4; 6 and 4, in particular, the right end side in FIG. 1 has a protrusion 8b having a substantially elliptical cam surface 8C as shown in FIG.
At i6, it can engage with the pin 5α of the inner cutter stand 5.

On the other hand, the left end portion of the cam 8 has a shape shown in FIG. 5, and portions 8α and 8d protrude as shown in FIG. positioning in the circumferential direction. Furthermore, the cam 8 is 4b of the inner cutter support 4.
It is held by a cam pusher 9 that is press-fitted to prevent it from coming off. 10 is a drive shaft whose left end portion guides the inner cutter support 4 and is supported by a bearing of the outer cutter frame 2. The right end side has a thick saw-shaped gear, and the left side thereof has a corner part that can be engaged with the corner part of the inner cutter support 4. Also, this vicinity is supported by the bearing of the outer cutter frame 2, like the left end. A pulley 11 is centered at the rightmost end of the drive shaft 10 and has a gear that can mesh with the sawtooth gear of the drive shaft 10, and a belt 12 engages in a part of the pulley. 15 is a motor; 14 is a small pulley press-fitted onto the shaft of the motor;
Belt 12 is engaged. 15 is a leaf spring, case 1
The tip is attached to the pulley 11, and its tip presses against the spherical portion at the right end of the pulley 11. 16 is a well-known power supply circuit.

Due to the above configuration, when the user of the electric shaver turns on a switch (not shown), current flows from the power supply circuit 16 to the motor 13, and the motor 13 rotates in the direction of the arrow in FIG. 2 (clockwise rotation). Rotate to . Then, the pulley 11 also rotates in the same direction via the belt 12, causing the drive shaft 10 to rotate in the same direction. At this time, the leaf spring 15
is pushed toward the drive shaft, so the saw-shaped gear does not come off and not only transmits power reliably, but also
It works to eliminate play in the thrust direction of the drive shaft (so that the collar on the right end side of the drive shaft comes into contact with the bearing of the outer cutter frame 2). Therefore, quiet transmission is performed regardless of the amount of play in the axial direction of the drive shaft 10.

When the drive shaft 10 rotates, the inner cutter support 4 is rotated through the engagement of the corner portions, and therefore the inner cutter support 4 and the inner cutter stand 5 are rotated.
．． Blade 6. The inner cutter consisting of a blade pusher F rotates counterclockwise concentrically with the drive shaft 10. On the other hand, as described above, the inner cutter base 5 is loosely fitted onto the pin 4α of the inner cutter support 4, and although not shown, the pin 4α is pushed up by the action of a spring portion that is cut and raised from the blade 6. Since the center trap rotates clockwise and is about to spread in the radial direction of the inner blade support 4, the tip of the blade 6 presses the inner surface of the outer blade 5 by the spring force and slides. When hair is introduced through the well-known pores of the outer cutter 3, it can be shaved off by cooperation with the outer cutter 3. This rotary type electric cooker rotates in one direction, and the tip of the blade 6 has an acute angle, so it is sharp. In addition, cam 8
does not rotate because the 8α portion and the Bd portion engage with the groove 2α portion of the outer cutter frame 2 and are positioned. In addition, as shown in FIGS. 1, 2, and 4, in the range where the blade 6 is in contact with the inner surface of the outer cutter 3, the pin 5α of the inner cutter base 5 touches the cam surface 8C of the cam 8.
Although the distance from the blade 6 is the amount B shown in FIG. It is rotated clockwise around pin 4α of the inner blade support by the action of spring 6.
Therefore, the distance from the center of the inner blade support 4 to the pin 5α increases, and eventually the gap B disappears and the pin 5α
gradually comes into contact with the cam surface 8C. After that, the inner blade support 4
As the inner cutter base 5 rotates, the inner cutter base 5 is regulated by the pin 5a and the cam 8, and as shown in FIG. As a result, the radius from the center of the inner cutter support 4 to the cutting edge of the blade 6 gradually expands and eventually contracts again. From the end of γ, a cam surface with a radius of R is formed from a point eccentric in the direction substantially opposite to that described above.
Since the cam surface is composed of a common tangent from to R, r
→ Common tangent → Bin 5α is regulated to R, and the cutting edge of blade 6 also draws a trajectory close to this shape, and in the latter half of the regulation, the radius from the center of the inner blade support to the cutting edge of blade 6 is It is equal to or slightly smaller than the inner diameter of. Therefore, the outer cutter 3 smoothly contacts the inner surface with a very small collision angle θ. The cutting edge of the blade 6 is at a point P on the inner surface of the outer blade 3!
After making contact at , the pin 5α of the inner cutter stand 5 separates from the cam surface formed by R by an amount corresponding to the amount shown in FIG. 4B. In this way, in one embodiment of the present invention, the blade 6 constituting the inner blade
At least from the time when the blade 6 separates from the outer cutter 5 until it contacts again, the trajectory of the cutting edge of the blade 6 is regulated so that it can smoothly re-contact with the outer cutter 3, and furthermore, 1 the regulating means is used. The feature is that a certain cam 8 is integrally arranged with the inner cutter support 4, which is one of the constituent means of the inner cutter, so that the user cannot separate it, and by doing so, the following effects are obtained. .

〔effect〕

1. When the blade 6, which is a component of the inner blade, comes into contact with the outer blade again, the collision angle can be made very small. In addition to being able to reduce vibration by 4, the sharpness of the cutting edge of the blade 6 is eliminated, increasing the sharpness and bending resistance of the electric shaver.

Z Reduces energy loss due to collisions, saves electricity, and allows equipment to be made smaller.

After several days of use, the user will clean the inside of the outer cutter frame 2 to clean the beard debris, but at this time, slide the outer cutter frame 2 from the case 1 to the left in Fig. 1. Then, separate and remove the drive shaft from the saw-shaped gear part, clean the inside of the outer cutter frame 2 with a brush (not shown), and then slide the drive shaft 10 to the right as necessary. Remove it from the outer cutter frame 2, then remove the inner cutter with the cam 8 still attached, and clean the inside of the outer cutter frame 2, the inner cutter, and the cam. At this time, since the blade 6 is released from the outer blade 5, it tries to spread around the pin 4α of the inner blade support 4 due to the spring force of the blade 6, but the 8b portion of the cam 8 Since the bin 5α of the inner cutter stand 5 is regulated and prevented from spreading more than necessary, the inner cutter is easy to handle and easy to clean.

4. Furthermore, since the end face of the 8b portion of the cam 8 is arranged to face the end face of the inner cutter stand 5, even if the inner cutter stand 5 is operated by hand and moved in the axial direction, the amount of subsequent movement is restricted. This prevents the hole of the inner cutter stand 5 from completely coming off from the bin 4α.

5. After cleaning the inner cutter and outer cutter frame 2, when returning the inner cutter to the outer cutter frame, as shown in Figures 1 and 3, 8 (1
, 8b is engaged with the groove 2α of the outer cutter frame, which is a fixed object, and then assembled so that 8d is above 8α,
The phase of the bin 5α of the inner cutter base 5 with respect to the cam 8 is automatically determined as described above, and therefore the phase of the blade 6 with respect to the outer cutter 3 is also set as the above-mentioned design value, and when cleaning the inner cutter, When taking out the inner cutter from the outer cutter frame 2, 1. Inner blade stand 5
and cam 8, leaving cam 8 on the outer cutter frame side.
Compared to conventional structures, it operates more reliably after cleaning and is free from malfunctions. This is because when the regulating cam 8 and the inner cutter base 5 are separated in the conventional type, the inner cutter base 5 can be properly engaged with the cam 8 during reassembly, and the blade position of the inner cutter can be properly engaged. This is because it is difficult to set the cam to the correct phase with respect to the outer cutter 5, but if the cam is attached and detached integrally with the inner cutter 1 as in the present invention, the cam 8 is placed in the outer cutter frame 2, etc. This is because the phase of the blade 6 relative to the outer blade can be easily and reliably set by simply positioning the blade 6 with respect to the fixed object 9.

& Since the end face of the cam 8 is arranged to face the end face of the inner cutter stand 5, the span of the inner cutter stand 5 becomes narrower, and therefore the inner cutter blade 6
However, since the inner cutter blade 6 is extended and placed so as to overlap the outer circumference of the cam 8, the blade width can be set as wide as when no cam is installed, and it can be set quickly. It can improve shaving performance.

As detailed above, the present invention has many advantages and has great practical value.

As an embodiment of the present invention, one cam 8 is disposed on the left end side of the inner cutter support, but the cam 8 is not limited to this, and may be provided on both the right end side and the outer cutter frame. Positioning can be performed not only by the case 1 but also by all the fixed objects such as the outer cutter 5.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an electric shaver seen from the front side showing an embodiment of the present invention, FIG. 2 is a sectional view of the left side of FIG. 1, and FIG. FIG. 4 is a left side view, FIG. 4 is a right side view of the cam, and FIG. 5 is a side sectional view of a conventional electric shaver. In the entire diagram, 1...Case 2...Outer cutter frame 3...Outer Blade 4...Inner cutter support 5...Inner Blade base 6...Blade part 8 of the inner blade...Cam or above

Claims (1)

[Scope of Claims] (1) Consisting of an outer cutter, an inner cutter that slides into contact with the outer cutter, and a regulating means for regulating the movement of the inner cutter and the outer cutter at least at the start of contact, the regulating means being connected to the inner cutter. A rotary electric razor characterized by being constructed integrally with the blade. (2) The regulating means is a cam, and the cam is coaxially supported with the rotation axis of the inner cutter and positioned by a fixed object. Rotary electric razor. (3) The regulating means is configured to engage with the inner cutter to regulate the outer cutter and to regulate the free shape of the inner cutter when the inner cutter is removed from the electric shaver. A rotary electric shaver according to claim 1, characterized in that: (4) Consisting of an outer cutter, an inner cutter in sliding contact with the outer cutter, and a regulating means for regulating the movement of the inner cutter and the outer cutter at least at the start of contact, the end face of the inner cutter and the end face of the regulating means. The rotary electric shaver is characterized in that the inner cutters are arranged to face each other, and the blades of the inner cutters are arranged so as to overlap and move around the regulating means. (6) Consisting of an outer cutter, an inner cutter that comes into sliding contact with the outer cutter, and a regulating means for regulating the movement of the inner cutter and the outer cutter at least at the start of contact, and the regulating means controls the constituent elements of the inner cutter. A rotary electric shaver characterized in that an inner blade is arranged to prevent the inner blade from coming off.