JPS635787A - 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】

TECHNICAL FIELD The present invention relates to a rotary electric shaver that rotates an inner cutter and cuts beards using an inner cutter and an outer cutter.

[Background technology]

In conventional rotary electric razors, as shown in FIGS. 10 and 11, in order to easily introduce curly hair and improve the cutting efficiency of curly hair, there is a A slit-shaped whisker introduction hole 2 is provided. In addition, the inner cutter 3 has an inner cutter blade 5 inserted into a slot 8 of a disc-shaped inner cutter block 4 made of a synthetic resin molded product rotated by a motor, and is elastically pushed up by a spring 7. The inner cutter blade 5 is in sliding contact with the lower surface of the outer cutter 1. However, since the inner cutter block 4 is a synthetic resin molded product, its roundness varies, so the rotation locus of the inner cutter blade 5 attached to this inner cutter block 4 is not constant (and the inner cutter The rotation locus is not constant due to the centrifugal force and wind pressure accompanying the rotation of the inner cutter blade 5. If the rotation locus of the inner cutter blade 5 is not constant in this way, the ya part on the outer circumference side of the inner cutter blade 5 that protrudes toward the outer circumference side will be There is a problem in that the hair gets into the slit-shaped hair introduction hole 2 provided at the outermost periphery of the outer cutter 1, scrapes the milk that is pressed against the hair introduction hole 2, and gives strong stimulation to the milk. Methods to reduce this irritation include reducing the aperture ratio of the slit-shaped whisker introduction hole 2, or making the cutting edge of the inner blade 5 smaller and moving it away from the outermost whisker introduction hole 2. Yes, but all are 0
This method has the drawback of making it difficult to introduce whiskers and reducing cutting efficiency.

[Purpose of the invention]

The present invention has been made in view of the technical background of the master, and its purpose is to remove the hair in the hair introduction hole at the outermost periphery of the outer blade without introducing hairs or deteriorating the cutting efficiency. The purpose is to reduce irritation during shaving and improve skin contact.

[Disclosure of the invention]

The rotary electric shaver of the present invention is a rotary electric shaver in which an inner cutter 3 that is rotatably driven is disposed on the lower surface side of an outer cutter 1, and a slit-shaped beard introduction hole 2 is provided on the outermost periphery of the outer cutter 1. , an inner cutter blade 5 is attached to the upper surface of the inner cutter block 4 so that it can slide freely in the radial direction of the inner cutter block 4, so that the inner cutter blade 5 slides in sliding contact with the lower surface of the outer cutter 1. The device is characterized in that an excitation section 6 for causing minute vibrations is provided on the inner circumferential surface of the outer surface. Therefore, even if the inner blade 5 protrudes slightly toward the outer periphery due to molding variations in the inner cutter block 4 or centrifugal force, the inner blade 5 is slightly vibrated toward the inner radial side, so that the inner blade 5 protrudes slightly toward the inner radial side. This reduces the protrusion probability (average time) of the inner blade 5 toward the outer circumference, reducing the irritation caused by the inner blade 5 at the whisker introduction hole 2 at the outermost periphery of the outer cutter 1, and reducing contact with the skin. It can be done well. In addition, since the inner blade 5 is only slightly vibrated inward, it is possible to maintain a good condition without introducing zero whiskers or reducing the cutting efficiency at any opening between the inner blade 5 and the whisker introduction hole 2. It is possible. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The lower part of the razor main body 9 is a grip part 10, and the upper end is a blade mounting part 12 from which a drive shaft 11 of a motor projects. The inner cutter 3 can be removably fitted onto the drive shaft 11, and the outer cutter 1 can be screwed onto the outer periphery of the blade mounting portion 12. The outer cutter 1 has a substantially cylindrical outer cutter 7 frame 13.
An outer cutter net 14 is attached to the upper end, and a large number of vertically long slit-shaped whisker introduction holes 2 are formed at the outermost periphery of the outer cutter net 14, and the outer cutter net 14 is surrounded by the whisker introduction holes 2. A large number of shaving holes 15 are formed in a certain pattern in the area. The inner cutter 3 has a plurality of inner cutter blades 5 attached to a disk-shaped inner cutter block 4 made of synthetic resin molding, and a connecting shaft 16 is provided at the center of the inner cutter block 4. Drive the fitting hole 17 in the center of 16 I/Bi1
It is adapted to be attached to the razor main body 9 by being fitted into the razor body 9. A plurality of slots 8 are opened radially from the top surface of the inner cutter block 4 to the outer peripheral surface.
Inner blades 5 each having a cutting edge 18 at the upper end are inserted therein, and each inner blade 5 is elastically supported by a push-up spring 7 provided on the lower surface of the inner blade block 4. . The inner blade 5 is elastically pushed up by the push-up spring 7, and the upper end cutting edge 18 is brought into sliding contact with the lower surface of the outer cutter net 14, and the outer peripheral end of the cutting edge 18 is pushed up by the push-up spring 7. Although they are opposed to the introduction hole 2, each inner blade 5 also has play in the radial direction so that it can move slightly in the radial direction. Further, approximately triangular projections 6a are provided as excitation parts 6 at fixed angle intervals on the inner periphery of the upper end of the outer cutter frame 13, and the inner cutter blade 5
An inner cutter block 4 is provided at the outer peripheral end of the inner cutter block 4 facing the protrusion 6a.
An arc-shaped sliding protrusion 19 is provided so as to protrude from the outer peripheral surface. When the motor is driven to rotate the inner cutter 3, the inner cutter blade 5 rotates while slidingly contacting the lower surface of the outer cutter 1. At the same time, the inner blade 5 is moved slightly toward the outer circumference by centrifugal force, and when its sliding protrusion 19 comes into sliding contact with the protrusion 6a of the excitation section 6, it is pushed inward, and when it passes the protrusion 6a, it is again moved by the centrifugal force. Since it moves toward the outer diameter, when the inner cutter 3 rotates at high speed, the inner cutter blade 5 is slightly vibrated toward the inner diameter in order to repeat the above operation in a short period. Therefore,
The inner blade 5 is repeatedly retracted inward by the protrusion 6a, and the time during which the inner blade 5 moves toward the outer diameter and protrudes into the hair introduction hole 2 is short on average. 2, the probability of interference with the skin is reduced and the contact with the skin becomes smooth.What is shown in FIGS. 3 and 4 is a second embodiment of the present invention, in which the inner blade 5 has a It consists of 2Wi, consisting of a blade 5a and an outer inner blade 5b, and both inner blades 5 can slide in the radial direction within the slot 8, and the push-up spring 7 can also slide somewhat in the radial direction. Both inner cutter blades 5 are engaged with the push-up spring 7 by the locking legs 20, and the end portion 2 of the push-up spring 7 is engaged with the push-up spring 7.
1 is made to protrude from the outer peripheral surface of the inner cutter block 4. When the end portion 21 of the push-up spring 7 is pushed in, the push-up spring 7 is retracted toward the inner circumference, the locking leg 20 is pushed, and the inner blades 5a and 5b are also moved toward the inner circumference. *In addition, a plurality of protrusions 6a as excitation portions 6 are protruded from the inner periphery of the outer cutter 7 frame 13, facing the end 1!1s21 of the push-up spring 7. Therefore, when the inner cutter 3 is rotated, the end of the push-up spring 7 is pushed by the protrusion 6a at short intervals, causing the inner cutter blade 5 to vibrate slightly. What is shown in FIG. 5 is a fifth embodiment of the present invention, and what is shown in FIG. 6 is a fourth embodiment of the present invention. The protrusion 6a serving as the portion 6 is made of a rubbery material that is different from the outer cutter 7 frame 13 made of aluminum or hard plastic. What is shown in FIG. 7 is a fifth embodiment of the present invention, in which the outer peripheral end of the inner cutter blade 5 is held slidably at a certain distance in the radial direction within the slot 8 of the inner cutter block 4. A pressure receiving part 22 is formed by bending in the circumferential direction to receive wind pressure, and -
An excitation part 6 is provided around the inner circumference of the outer cutter 7 frame 13 at the same height as the pressure receiving part 22. The excitation portion 6 is formed into a wave shape by alternately arranged protruding portions 23 and concave portions 24. When the inner cutter 3 rotates, wind is generated between the outer circumference of the inner cutter blade 5 and the inner circumference of the outer cutter frame 13, but this wind pressure is caused by the air being compressed at the position of the protrusion 23. As the height increases, the inner blade 5 is retracted to the inner diameter side by removing the pressure receiving part 22, and the air expands in the concave vein part 24 and the wind pressure becomes low (as a result, the inner blade 5 moves to the outer peripheral side due to centrifugal force). As a result, the inner cutter blade 5 is slightly vibrated. [Effects of the Invention] As described above, the present invention has an inner cutter blade that slides into contact with the upper surface of the inner cutter block and the lower surface of the outer cutter in the radial direction of the inner cutter block. It is attached so that it can slide freely, and an excitation part is provided on the inner peripheral surface of the outer cutter to slightly vibrate the inner cutter blade in the radial direction when the inner cutter block rotates, so there is no possibility of uneven molding of the inner cutter block or centrifugal force. Even if the inner blade protrudes slightly toward the outer circumference, the inner blade is slightly vibrated inward, causing it to retract slightly toward the inner circumference, and the probability (average time) of the inner blade protruding toward the outer circumference decreases. It has the advantage of being smaller and reducing the excessive force caused by the inner blade at the whisker introduction hole on the outermost periphery of the outer blade, making for better contact with the mackerel and skin.Also, the inner blade is slightly vibrated toward the inner diameter. 0 between the inner cutter blade and the whisker introduction hole.
It is possible to introduce zero whiskers and maintain good cutting efficiency without reducing whisker introduction or cutting efficiency.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an outer cutter and an inner cutter showing a first embodiment of the present invention, Fig. 2 is a sectional view of the same, and Fig. 3 is a partially broken perspective view of an inner cutter in a second embodiment of the present invention. FIG. 4 is a partially broken front view of the same as above; FIG. 5 is a cross-sectional view showing a fifth embodiment of the present invention; FIG. 6 is a partially enlarged cross-sectional view showing a fourth embodiment of the present invention; Fig. 7 is a partially cutaway perspective view showing a fifth embodiment of the present invention, Fig. 8 is a perspective view of a rotary razor, and Fig. 9 shows the same outer and inner cutters removed from the razor body. FIG. 10 is a partially cutaway front view showing the outer cutter and inner cutter of the conventional example, and FIG. 11 is an enlarged view showing the outer periphery of the same outer cutter. 1...Outer blade 2...Hair introduction hole 3...Inner blade 4...Inner blade block 5...Inner blade 6...Excitation department agent Patent attorney Ishi 1) Long 7th 3rd Figure It! Figure 4'lX5 Figure 6 Figure 7

Claims (1)

[Claims] (1) In a rotary electric shaver that has an inner cutter that is rotationally driven on the lower surface of the outer cutter and a slit-like hair introduction hole on the outermost periphery of the outer cutter, the outer cutter is attached to the top surface of the inner cutter block. The inner blade that slides on the lower surface is attached so as to be able to slide freely in the radial direction of the inner cutter block, and an excitation part is provided on the inner peripheral surface of the outer cutter to cause the inner blade to slightly vibrate in the radial direction when the inner cutter block rotates. A rotary electric shaver comprising: