JPS6019267B2 - electric razor - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reciprocating electric shaver.

In general, in a reciprocating electric shaver, an outer cutter is attached to an outer cutter frame in an arc shape, and an inner cutter corresponding to the outer cutter reciprocates along the circumferential direction of the outer cutter.

The inner cutter is connected via a push-up spring to a driver that is reciprocated by a drive unit, and the inner cutter causes lateral vibration due to the connection between the driver and the inner cutter. Therefore, an appropriate gap is provided between the lower ends of both sides of the outer cutter and the upper end of the outer cutter frame to prevent deformation, uneven wear, and abnormal noise of the outer cutter due to lateral vibration of the inner cutter. However, if whisker debris accumulates in this gap, the gap is filled by the whisker shoulder, which restricts the lateral freedom of the inner cutter, causing deformation of the outer cutter and uneven wear of the outer cutter, resulting in reduced sharpness and shortened service life. However, there were problems in that the outer blade was damaged and abnormal tapping noises were generated. The present invention has been provided in view of the above-mentioned points, and it prevents debris from accumulating in the gap between the inner cutter and outer cutter frame, prevents deformation of the outer cutter, improves the life of the outer cutter, and maintains sharpness. , provides an electric shaver aimed at reducing noise.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a reciprocating electric shaver that can be held with one hand, and this electric shaver includes a housing 1, an inner cutter block A disposed in the housing 1
, a drive block B that drives the inner cutter block A, and the like. The housing 1 consists of two flat box-shaped housings la and lb with one side open, and the outer surface of one housing la has a number of recessed dimples 7 formed therein to prevent slipping and make it easy to grip. There is. A switch handle 8, which is plate-shaped and has a wave-like surface and can be slid freely, is provided approximately at the center of the outer surface of the other housing lb. Further, a trimmer 9 that is rotatable approximately 90 degrees is disposed at the upper part of the housing lb. The inner cutter block A is arranged on the upper part of the housing 1, and a large number of semicircular inner cutters 2 are fixed to a mounting base 14.

The mounting base 14 is a drive element 6 arranged below this mounting base 14.
It is attached to the drive element 6 by a shaft 15 so as to be vertically movable. A recess 17 with an upper surface opening is cut in the upper part of the drive element 6, and a coiled push-up spring 16 disposed within the recess 17 pushes the inner cutter 2 upward. Reference numeral 3 denotes an outer cutter frame for attaching the outer cutter 4, and the inner surface of the outer cutter frame 3 is provided with protrusions 5, each having an elastic plate shape and having countless holes. The outer cutter 4 is attached together with a mounting plate 18 by hooking its mounting hole 19 onto the protrusion 5.

Since the inner cutter 2 is pushed upward as described above, the tip of the inner cutter 2 is in close contact with the inner surface of the outer cutter 4, and the outer cutter 4 is also pushed upward to the lower end of the mounting hole 19. ing. A tree-like slit 20 is formed in the vertical direction on the outer side of the upper end of each of the front and rear surfaces of the outer cutter frame 3. The slit 20 forms a sloped surface 22 that is inclined downward from approximately the center of the upper end surface of the outer cutter frame 3 and reaches the outer surface of the outer cutter frame 3. Also slit 20
The lateral center of the vertical rib 21 formed therebetween is larger than the lateral center opening of the slit 20. therefore,
When the outer surface of the outer blade frame 3 hits the skin, it feels smooth and good against the skin, and the arrangement of the slits 20 and ribs 21 has the effect of raising the skin. It allows for deep shaving and speedy shaving work. The reciprocating motion of the inner cutter 2 is such that the outer cutter 4 is attached to the outer cutter frame 3 to form an arc shape, and reciprocates along the inner surface of the outer cutter 4 substantially along the arc.

Since lateral vibration of the inner cutter 2 occurs due to the connection between the inner cutter 2 and the drive element 6, an appropriate gap is provided between the outer cutter 4 and the upper inner surface of the outer cutter frame 3. It is provided. Therefore, this gap prevents deformation of the outer cutter 4 due to lateral vibration of the inner cutter 2, uneven wear, and generation of abnormal noise. In addition, in the actual shaving condition, a shaving load is applied in the P direction shown in FIG.
An intersection part E is provided between the upper surface of the inner cutter 2 and the lower surface of the inner cutter 2. Therefore, the lower surface of the inner cutter 2 is prevented from protruding from the upper surface of the outer cutter frame 3 when the inner cutter 2 is pushed upwardly. Most of the beard debris during shaving falls below the inner cutter 2, but some of the beard debris is introduced into the slit 20 through the surface of the outer cutter 4 through the gap 2, and is further introduced into the slit 20. Tahige calendar is slit 20 and slope 22
It passes along the top and is discharged downward. Further, the beard shoulder on the upper surface of the outer cutter frame 3 is automatically removed by the comb-shaped slit 20 by the vibration of the inner cutter 2, so that the beard shoulder does not accumulate in the gap. Note that 23 is a protective cap that covers the outer cutter 4 and the outer cutter frame 3. Furthermore, the shape of the lower part of the slit 20 is a curved surface as shown in FIG. 2, which facilitates the removal and cleaning of hair debris adhering to the surface of the slit 20. In addition, the slits 2 at both ends of the outer blade frame 3
The length in the vertical direction is made shorter by 0. Therefore, the hair that has accumulated inside is likely to spill out into the gap between the outer cutter 4 and the outer cutter frame 3 at both ends where the outer cutter 4 is attached to the outer cutter frame 3, reducing the area of the face surface 22 in the slit 20. By doing so, the amount of adhesion of beard debris can be reduced and cleaning work becomes easier. On the contrary, the slit 20 at the center of the outer cutter frame 3 is made longer than the length in the vertical direction of the slits 20 at both ends.
As mentioned above, the outer cutter frame 3 is formed with the aim of producing a raised effect when the outer cutter frame 3 is brought into contact with the skin. A drive block B, which is a drive unit for driving the inner cutter 2, has an eccentric balancer 12 attached eccentrically to a metal shaft 11 of a motor 10 disposed in the lower portion of the housing 1.

This eccentric balancer 12 is connected to the shaft 11 and the eccentric balancer 1.
One end of an eccentric shaft 13 is mounted eccentrically with respect to 2, and the other end of this eccentric shaft 13 is connected and fixed to the upper driver 6.
When the motor 10 rotates, the eccentric balancer 12 rotates eccentrically on the shaft 11, and the drive element 6 rotates on the eccentric shaft 13.
reciprocate. 9 by the protrusion 25 of the driver 6.
The trimmer driver 26 of the trimmer 9, which has been rotated by 0 degrees, is driven. The eccentric balancer 12 is made of a metal or non-metallic material with a large specific gravity in order to offset vibrations caused by its unbalanced weight and load. An insulating member 24 made of nylon, duracon, etc. is provided integrally over the entire structure. In addition, a driver 6 that converts rotational motion into reciprocating motion
The eccentric D shaft 13, which is the connecting part, is made of metal from the viewpoint of wear resistance and bending strength. Therefore, the motor 10 and shaft 11, which are the passing parts, and the eccentric balancer 12 and eccentric shaft 13
and are insulated via the insulating member 24. By setting the insulation distance b between the upper end of the insulating member 24 provided at the lower part of the eccentric 10 balancer 12 and the upper surface of the motor 10 to be four or more ribs, the through window 27 of the trimmer 9 formed in the housing 1 and the eccentric shaft 13 are set. Insulation can be ensured by setting the insulation distance a to the eccentric balancer 12 to be 4 degrees or more, so that the insulation effect is good, the electrical insulation safety is increased, and the appliance can be used with peace of mind. Furthermore, since insulation can be ensured without increasing the thickness of the housing 1, it can be manufactured in a small size. 6 to 8 show a structure for attaching and detaching the housing 1 and the instrument plug 32, and the bottom surface of the housing 1 is formed with an elliptical hole portion 28 having a closed lower surface. A pair of terminal pins 29 are provided in the barrier hole portion 28 to project downward, and both terminal pins 29 of the barrier hole portion 28 are provided with a pair of terminal pins 29 projecting downward.
, 29, a clip pin 30 that is movable in the lateral direction is protrudingly provided approximately at the center of the inner wall surface. This clip pin 30 is biased by a coil spring 31 in the housing lb so that its tip protrudes into the opening 28. The instrument plug 32 has a shape that substantially corresponds to the shape of the barrier hole 28, and has a pair of plug receiving blades 33 formed therein to be connected to the terminal pin 29 in a ferrous manner. Recesses 34 having a substantially triangular cross section corresponding to the shape of the tip of the clip pin 30 are provided on both sides of the instrument plug 32 at locations corresponding to the clip pins 30 . FIG. 6 shows the housing 1 and the instrument plug 32 in a state in which the clip pin 30 and the recess 34 are iron-coupled to form a so-called lock. When the instrument plug 32 is attached or removed, the click pin 30 is pushed against the coil spring 31 by the distal end surface of the instrument plug 32 and the slope of the recess 34. In this way, the locking click pin 3 is placed in the center between the terminal pins 29.
0 is provided, so when the instrument plug 32 is installed,
The locking load is evenly applied to the terminal pins 29, improving the reliability of conduction and stabilizing the locking of the instrument plug 32, and also weakening the bonding force between the terminal pins 29 and the plug receiving blade 33, and reducing the bonding force. Since the stabilization can be maintained for a long period of time, the operation of attaching and detaching the instrument plug 32 becomes easy. Furthermore, when the instrument plug 32 is attached to the terminal pin 29, the clip pin 30 makes a sound similar to a clipping sound, making it clear that the instrument plug 32 is attached, and eliminating the worry of the instrument plug 32 coming off due to insufficient insertion. It is.
35 is an engagement protrusion for engaging the protective cap 23 that protrudes from the outer surface of the housing la in which the dimple portion 7 is formed;
This engagement protrusion 35 is connected to the dimple portion 7 as shown in FIG.
are provided on both sides of the upper end of the array.

Note that the surface of the housing la where the engagement protrusion 35 is provided and the surface below that where the dimple portion 7 is provided are defined by the protective cap 23 when the outer cutter frame 3 is covered with the protective cap 23.
The surface on which the dimple portion 7 is provided is one step higher so that the outer surface of the housing la and the surface of the housing la are substantially flush with each other.
A protective cap 23 is also placed in the upper center of the other housing lb.
A rectangular engagement convex portion 36 for engagement is provided in a protruding manner. On the other hand, as shown in FIG. 4, the elastic protective cap 23 is provided with an engaging recess 37 corresponding to the engaging protrusion 35 and an engaging recess 38 corresponding to the engaging protrusion 36 at the lower part of its inner surface. It is being When the protective cap 23 is attached, the protective cap 23 is attached to the engaging protrusion 35 and the engaging protrusion 3 of the housing 1.
Up to 6, the outer cutter frame 3 and the upper part of the housing 1 guide it smoothly and the load is small and it can be inserted, and when the lower end of the protective cap 23 comes to the engagement protrusion 35 and the engagement protrusion 36, the load suddenly increases. becomes larger, the engagement protrusion 35 is engaged with the engagement recess 37, the engagement protrusion 36 is engaged with the engagement recess 38, and the protective cap 23 is attached to the housing 1. When the relationship between the load F and the stroke S when the protective cap 23 is attached is graphed as shown in FIG. 5, the characteristic curve shows a steep sacrifice in the rise. This sudden rise indicates that the protective cap 23 has a good clickability (feel) when attached, and is what is called a snap. Conversely, if the rise of the characteristic curve is slow, the feel will be poor. When removing the protective cap 23 from the housing 1, the protective cap 23 can be removed from the engaging portion by pinching the side walls 39 on both sides and using elasticity to widen the gap. By the way, in the case where the outer cutter frame 3 is formed with a protrusion for engaging with the protective cap 23, when the protective cap 23 is pulled, the outer cutter frame 3 also comes off. Since the protrusion 36 is provided on the housing 1, the outer cutter frame 3 will not come off even if the protective cap 23 is pulled. Furthermore, if the mating portion of the protective cap 23 is a protruding protrusion, the protrusion will rub against the outer cutter frame 3 when the protective cap 23 is attached or detached, causing paint peeling. Since the engaging portion is a recessed engaging portion consisting of an engaging recess 37 and a sub-recess recess 38, peeling of the paint does not occur.
As described above, the present invention includes forming a comb-shaped slit vertically through a rib in the upper end of at least one of the outer cutter frames to which both ends of the outer cutter, which has an arcuate cross section and corresponds to the inner cutter, are attached. Since the surface of the outer cutter frame facing this slit is tilted downward to form a forehead slope that reaches the outer surface of the outer cutter frame, the beard debris that is generated when shaving and flies to the side can be removed from the slit and Enoki slope. Since it is discharged to the outside through
As a result, the outer cutter does not deform even when the inner cutter oscillates laterally, extending its service life, maintaining good sharpness, and reducing noise.Furthermore, the slit makes the outer cutter look larger and generates more power. This has the effect of increasing the feeling of fullness.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a rear view of the same, Fig. 4 is a perspective view of the protective cap of the above, and Fig. 5 is a protection of the same as the above. Characteristic diagram when the cap is attached, FIG. 6 is a cross-sectional view showing the attachment/detachment structure of the above instrument plug, FIG. 7 is a longitudinal sectional view of the same, and FIG. 8 is a bottom view of the same. 4 is an outer cutter frame, 4 is an outer cutter, 6 is a driver, 10 is a motor, 20 is a slit, and 21' is a bulge. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1. In an electric shaver in which an inner cutter is provided via a push-up spring to a driver that can freely reciprocate in a drive unit, both ends of an outer cutter having an arcuate cross section corresponding to the inner cutter are attached. A comb-shaped slit is formed in the upper end of at least one of the outer cutter frames in the vertical direction via a rib, and the surface of the outer cutter frame facing the slit is inclined downward to reach the outer surface of the outer cutter frame. An electric shaver characterized by being formed on an inclined surface. 2. The electric shaver according to claim 1, wherein the width of the ribs formed between the slits is larger than the width of the slits. 3. The electric shaver according to claim 1, wherein the slits at both ends of the outer cutter frame have shorter lengths in the vertical direction, and the line connecting the lower portions of the slits has a curved shape.