JPH0211271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for a sliding/rotating structure of a shaving blade block of an electric shaver, in which the shaving blade block slides or rotates protruding from a razor body.

Among conventional electric razors with shaving blades for cutting long hair, there is one in which the shaving blade can be rotatably and slidably protruded from a part of the electric shaver body and stored therein. For example, in Japanese Patent Application Laid-Open No. 53-128465, a trimmer block is slidably protruded from a part of the housing and is housed in the trimmer block. and a trimmer block. When the switch handle is slid upward to operate the trimmer, the switch handle comes into contact with the end of the link body, causing the link body to rotate around the pin, and as a result, the link body A trimmer block connected to the other end protrudes from the housing. However, this structure has a serious drawback in that if the user accidentally presses the protruding part of the trimmer block and slides the switch handle forcefully to make it protrude, part of the protrusion mechanism of the trimmer block will be damaged. was.

The purpose of the present invention is to eliminate such drawbacks, and to provide a highly safe electric shaver that will not be damaged even if the user strongly operates the switch member when an abnormal force is generated on the scraping blade block. That is.

The gist of the present invention is to provide a scratching blade block that includes a fixed scraping blade, a movable scraping blade that is slidably supported by the fixed scraping blade, and a scraping board that supports the fixed scraping blade, and that protrudes from a case member and is installed in a retractable manner. a switch button disposed so as to be slidable on the case member; one end engages with the scraper blade block so that the scraper blade block protrudes from the case member and is retracted when the switch button is slid; a sharpening blade connecting member whose end engages with the switch button; the switch button is provided with a pin protruding inward; and a portion of the sharpening blade connecting member that engages with the pin has an opposing A pair of elastic legs are provided with a slit-like joint hole formed by a side surface thereof, and the pin is inserted into the joint hole, and a first hole having the same diameter as the pin, and a first hole having the same diameter as the pin are inserted into the joint hole.
a second hole adjacent to the hole and having the same diameter as the pin;
A narrow part is provided between the hole and the second hole, and a narrow part is provided in which the interval between the joint holes is narrowed by a projection protruding from the elastic leg part, and the elastic leg part is normally connected to the pin of the switch button. is inserted into the first hole, and by operating the switch button, the scraping blade block is protruded and moved into storage,
The electric shaver is characterized in that the pin is set to have an elastic force that moves the pin from the first hole to the second hole by operating a switch button when an abnormal force is generated in the shaving blade block.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 1 is a front sectional view of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 1.
FIG. 4 is a sectional view taken along line CC in FIG. FIG. 5 is a perspective view of the edge rotation drive plate.

In each figure, two outer blades 1 are connected to two inner blades 2.
In order to improve the adhesion with the outer diameter of the blade, it is formed into a substantially inverted U-shape, and one end of the side plate 4 is attached to the side plate 4 provided on both sides of the outer blade holder 3 made of synthetic resin as shown in FIG. The other end is formed into a substantially L-shape, and the left and right outer blades 1 are formed by overlapping the flat parts on the center side of the substantially L-shaped portions and attaching them to the outside. The two outer blades 1 and the outer cutter holder 3 are integrated by heat caulking using a pin 8 protruding from the central support rod 7 of the blade holder 3. Oscillator A
As shown in FIG. 1, the upper part of the inner cutter 9 is provided with a substantially U-shaped groove 11 in which the inner cutter pin 10 driven into the lower part of the inner cutter 2 slides. is provided with a pair of inner blade retaining protrusions 12 and an inner blade spring retaining protrusion 13, and an inner blade spring 14 is inserted into the outer periphery of the approximately U-shaped groove 11 of the vibrator A9.
When the inner cutter pin 10 is pushed into the substantially U-shaped groove 11 with the inner cutter pin 10 hooked onto the inner cutter spring retaining protrusion 13 on the upper end surface of the inner cutter 2, the inner cutter 2 is pushed to the top of the substantially U-shaped groove 11 by the inner cutter spring 14. It is pushed up and locked at the inner cutter stop protrusion 12. The vibrator B15 is attached to the lower surface of the vibrator A9 and has a frame shape with a space in the center as shown in FIG. 16, and the lower end thereof has a swinging fulcrum convex portion 25 that can be used as a swinging fulcrum, and the convex portion 25 is fitted into each case 29, 30 as shown in FIG. . Here, the vibrator A9 and the vibrator B15 are integrated, and the vibrator 17
becomes. Further, in the upper part of the vibrator B15, a plurality of vibrator coupling pins 18 protruding from the lower end of the vibrator A9 are inserted in order to integrally combine with the vibrator A9 to form a vibrator 17 as shown in FIG. A vibrator coupling hole corresponding to the vibrator coupling pin 18 is provided in order to couple the motor 1 by thermal caulking or the like.
A hole is provided into which a protrusion of a joint hole 20 is inserted, which is connected to an eccentric joint 19 that is press-fitted onto the output shaft of the motor 6 and converts the rotational motion of the motor into the oscillating motion of the vibrator 17. The motor board 21 in FIG. 1 has the motor 16 fixed to its lower surface with screws (not shown), and a pair of vibrator guide pins 23 are provided on its upper surface.
Vibrator guide groove 24 (long groove) provided above 5
When the vibrator 17 swings around the swing fulcrum convex portion 25, vibration is prevented. Further, on the right and left sides of the motor board 21 in FIG.
6 is integrally provided and is removably locked in V-shaped outer frame mounting grooves 28 provided on both inner surfaces of the outer frame 27 that holds the outer cutter attachment 3 to which the outer cutter 1 is fixed. Hold the outer frame.

The case is a vertically divided front case 29 as shown in Figure 2.
and a back case 30, and the upper inner surface of each of the front case 29 and the back case 30 is designed to prevent vibrations from internal vibration system members such as the motor 16, vibrator 17, and inner blade 2 from being transmitted to the case part. At the same time, the motor board 2 transmits the vibration of the motor 16.
If 1 and the case come into direct contact, noise will be generated at the contact area, so in order to prevent this, the end of the motor board 21 is inserted into the hole of the roughly box-shaped vibration-proof packing 31 made of foamed rubber. A vibrator packing mounting groove is provided for inserting and fixing the outer peripheral part of the vibration-proof packing 31 in that state. Also, front case 29
The lower part of the back case 30 has a cord holder (not shown) in which a pair of cord holder pins made of a conductive material are fixed by caulking to receive the input power source of the electric shaver.

On the other hand, in the crease board 32 shown in FIG. 4, a crease fixing blade 33 and a connecting plate 34 that rotatably supports the crease board 32 are fixed by thermal caulking.
Two guide pins 36 for slidingly guiding the movable scraping blade 35 and a scraping blade spring 37 (Fig. 3) that brings the movable scraping blade 35 into close contact with the fixed scraping blade 33 are mounted and supported on the fixed scraping blade 33. Two spring mounting pins 38 are driven and fixed. The connecting plate 34 consists of a connecting plate base 39 that is fixed to the grooved board 32 by thermal caulking, and a pair of approximately inverted L-shaped connecting arms 40 on both sides of the connecting plate base 39. A hole portion that fits the diameter of the fulcrum pin 41 provided on the inner surface of the outer cutter frame 27 is provided at the tip of the outer cutter frame 27 .

As shown in FIG. 1, a stepped pin having a large diameter portion 44 at the tip and a small diameter portion 45 at the base is integrally provided on the back surface of the switch button 42 that protrudes from the side of the case. As can be seen in the perspective view of FIG. 5, the sharp rotation drive plate 43 that interlocks with the operation of the switch button 42 is arranged on the inner surface of the case and has a semicircular click protrusion at its lower end. In addition, the switch shorting piece 47 that contacts the printed circuit board 55 that turns the power ON and OFF is fixed by heat caulking on the back side, and the U-shaped groove 57 of the connecting plate 34 (Fig. 4) is provided on the upper side. It has a crease rotation pin 48 that rotates the crease base plate 32 by coupling with the crease rotation pin 48 .

As shown in FIG. 2, a slit-shaped joint hole 56 is provided approximately in the center of the groove rotation drive plate 43, with a hole having approximately the same diameter as the small diameter portion 45 of the stepped pin of the switch button 42. . The joint holes 56 include a first joint hole 50 located below between the two joint arms 49, a second joint hole 51, and a first joint hole 50 located below and below the first joint hole 50.
It is constituted by articular processes 52, 52 provided between the joint hole 50 and the second joint hole 51, respectively. In order to assemble the switch button 42 and the pivoting drive plate 43 as shown in FIG. By pushing the switch button 42 into the first joint hole 50 shown in FIG. 2 by utilizing its elasticity, the large diameter portion 44 of the switch button 42 prevents the switch button 42 from falling out from the creased rotary drive plate 43. 42 and a groove rotation drive plate 43 are integrated.

The scraping movable blade 35 shown in FIG. 3 has a roughly L-shaped scraping movable blade arm 54 that engages with a roughly V-shaped scraping drive groove 53 provided on the top of the vibrator A9 at one end in its sliding direction. has been established.

The present invention has the above configuration, and its operation will be explained. Switch button 42 operation is OFF
←→ON←→ It is a three-stage switch for the sharpening blade operation, and when the switch button 42 is pushed up one step from the state shown in Fig. 1, the switch short-circuiting piece 47
is electrically connected to the copper foil portion of the printed circuit board 55, the motor 16 rotates, and the vibrator 17 that locks the inner cutter 2 is caused to swing. When the switch button 42 is further pushed up to the highest position, the crease rotation pin 48 of the crease rotation drive plate 43 enters the U-shaped groove 57 of the connecting plate 34 as shown in FIG. is pushed upward, so the connecting plate 34 rotates upward about the fulcrum pin 41, and the grooved board 32 attached to the tip of the connecting plate 34 becomes almost horizontal as shown by the two-dot chain line in FIG. It is rotated until. During this rotation, the sharp movable blade arm 54
The tip of the blade enters the crease drive groove 53 of the vibrator A9, and the crease blade is activated. Also, when the switch button 42 is pushed down, the groove rotation pin 48 pushes down the U-shaped groove 57 of the connecting plate 34, and the groove board together with the connecting plate 34 rotates downward about the fulcrum 41 to return to its original position. Along with returning to
The sharpening blade stops. In addition, the scratched substrate 32
When rotating upward or downward, the connecting plate arm 40
A click spring 58 (FIG. 4) connected to one tip of the outer cutter frame 27 and a part of the outer cutter frame 27 performs the click operation.

The above explanation has been given under the condition that the scratched board is rotated normally, but the safety device of the rotating structure which is the object of the present invention will be described.

As mentioned earlier, the rotation operation of the groove base plate 32 is performed using the first joint hole 50 of the groove rotation drive plate 43.
This is done using the switch button 42 connected to the small diameter portion 45 of the corrugated pin. ) is still attached, and the consumer operates the switch button 42 to rotate the scratched board 32 without realizing it. In this case, as a matter of course, the rotational movement of the scratched board 32 is hindered, so the operating force for the switch button 42 becomes very heavy, but the consumer does not notice the above-mentioned erroneous operation and presses the switch with even stronger force. When the button 42 is operated, a part of the crease rotation member such as the crease pivot pin 48 of the crease rotation drive plate 43 may be damaged due to abnormal force. The operation to prevent this will be explained. As mentioned above, the consumer accidentally presses the switch button 42 while holding down the scraping board 32 in order to turn the scraping blade to protrude.
When operated upward, the creased rotation drive plate 4
3 will not be able to rise. In that case, the small diameter portion 45 of the switch button 42 elastically deforms the joint arm 49 through the first joint hole 50, and the joint processus 5
2 and moves to the second joint hole 51, and although the scratched board 32 does not rotate, the switch button 42
Only the edge moves up to the top of the scratching operation position,
Protects the rotating member. In this way, in order to return the safety device between the switch button 42 and the sharp rotation drive plate 43 from the activated state to the normal state, by pressing the switch button 42 downward,
The power will temporarily stop at the ON position, but if you apply a little more force and push the switch button 42 further down,
As shown in Figure 1, the pivot pin 48 is on the front case 2.
9, only the switch button 42 descends downward, and the small diameter portion 45 of the switch button 42, which had been locked with the second joint hole 51, climbs over the articular process 52 and engages the first joint hole. It will return to 50 and you will be able to perform normal turning operations.

Also, after the scratched board 32 rotates and protrudes, the scratched board 32 may be accidentally held down by hand, causing the scratched board 32 to
Even if the switch button 42 is pressed down while the switch is fixed in the protruding state, the safety device is activated in the same way as described above to prevent damage.

As described above, in the present invention, the connecting portion between the switch button and the scraping blade connecting member (the scraping rotation drive plate in the embodiment) that protrudes and stores the scraping blade is
A pin protrudes from the switch button between a first hole (first joint hole) and a second hole (second joint hole) provided in a pair of elastic legs (joint arm). Since it is configured to be movable with an appropriate holding force, even if the switch button is strongly operated in an abnormal situation such as when the scraping blade block is pressed by hand, the pin will not move from the first hole to the first hole. 2
The safe operation of being able to move against the elastic force in the holes has a practical effect of preventing damage to each member. Moreover, even if this safety operation is activated, the pin can also be easily returned to the first hole by returning the switch button to its original position. Such a safety device does not require any special members and can be realized with a simple structure.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the present invention, FIG. 2 is a cross section taken along AA in FIG. 1, FIG. 3 is a cross section taken along BB in FIG. 1, FIG. 4 is a cross section taken along CC in FIG. FIG. 5 is a perspective view of the edge rotation drive plate. 32... Kiwazori board, 34... Connection plate, 42... Switch button, 45... Small diameter portion, 50... First joint hole, 51... Second joint hole, 52... Articular process, 57...
U-shaped groove, 43...Kiazoro rotation drive plate.

Claims (1)

[Claims] 1. A scraping blade block that has a fixed scraping blade, a movable scraping blade that is slidably supported by the fixed scraping blade, and a scraping board that supports the fixed scraping blade, and is glued to the case member so that it can be protruded and stored, and a scraping blade block that slides into the case member. A switch button is disposed so as to be movable, and one end engages with the scratching blade block and the other end engages with the switch button so that when the switch button is slid, the scraping blade block protrudes from the case member and is retracted. The switch button has a pin protruding inwardly, and the portion of the scraping blade connecting member that engages with the pin has a slit-shaped part formed by an opposing side surface. A pair of elastic legs are provided with a joint hole, a first hole into which the pin is inserted and which has the same diameter as the pin, and a first hole adjacent to the first hole and with which the pin is inserted. A second hole having the same diameter, and a narrow part in which the interval between the joint holes is narrowed by a projection protruding from the elastic leg part are provided between the first hole and the second hole, In the leg section, when the switch button is operated with the pin of the switch button inserted into the first hole, the scratching blade block is protruded and moved, and an abnormal force is generated on the scraping blade block. An electric shaver characterized in that the pin is set to have an elastic force that causes the pin to move from the first hole to the second hole when a switch button is operated.