JPH02198577A - Electric shaver - Google Patents

Abstract

PURPOSE:To prevent the backlash of an external shaving edge holder from being generated and improve sharpness by engaging the nib of an engaging body with the hooking recessed section of the external shaving edge holder, and by butting the lower end surface of the external shaving edge holder to an elastic body. CONSTITUTION:On fitting an external shaving edge holder 5 on the upper section of a main body case, 1 by pushing down the holder 5 to cover an internal shaving edge body 45, a hooking recessed section on the internal surface of the holder 5 is engaged with the cross-section-chevron nib 48a of an engaging body 48. In this state, the external shaving edge holder 5 is pushed against the bearing step section 1a of the main body case 1, and on the bearing step section 1a, the extended sections 11c of elastic bodies 11a, 1b are arranged, and so the section 1a is firmly fixed without being shaken, and even if ununiformity is generated on the forming position of the hooking recessed section and the shape of the nib 48a, engaging fluctuation due to the dimensional error of these is absorbed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improvement of electric shavers, and in particular, to provide a thin electric shaver with high structural mechanical strength against unnecessary external forces received during carrying or storage. With the goal.

〔Example〕

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

In Fig. 1, reference numeral 1 denotes a main body case made of electrically insulating synthetic resin, which is composed of two parts, a front case 2 and a back case 3, which are butted together at the side surfaces, forming a flat box shape as a whole. A container-shaped bottom case 4 made of synthetic resin such as ABS is held between the front and back cases 2 and 3.An outer blade holder 5 is detachably attached to the top of the main body case 1. On this outer cutter holder 5, an outer cutter 6 made of a nickel-cobalt electroformed or pressed thin stainless steel plate is stretched in an arch shape. 7 is a sharp edge block that rotatably protrudes from the main body case 1;
Reference numeral 8 indicates a switch button that protrudes from the cutter blade block 7 when the power source is opened/closed, and reference numeral 9 indicates a lock phase that prevents the switch button 8 from being moved inadvertently. Further, numeral 10 is a light emitting diode for displaying power on to indicate that charging is in progress. The main body constructed in this way has tended to become thinner in recent years, and has a flat box shape with the abutting surfaces of the two halves of the case located on the side surfaces, absorbing the force applied to the front and back surfaces, and increasing the thickness of the abutting surfaces. There is an urgent need to improve mechanical strength and eliminate squeaks from the case.

Therefore, in the above embodiment, shock-absorbing elastic plates 11a and 11 are provided on both side surfaces of the main body case 1, that is, on the abutting surfaces of the front and back cases 2.3 and on both side surfaces of the outer blade holder 5.
b, 12a, and 12b are attached. This elastic plate 11
a, 1 l b+12a, 12b are made of high-pressure polyethylene and preferably have a Shore hardness of about 70 to 80, but since the hardness is somewhat high, they are thin (0.6 ff thick).
lff1~1.8mm), and by forming it in a large arch shape, the inner surface is recessed to exhibit surface elasticity rather than local elasticity, but of course it has a Shore hardness of 45~1.8mm). It is also possible to form it from a neoprene rubber or silicone rubber plate of about 60 mm.

Next, the driving portion housed in the main body case 1 will be explained with reference to FIG.

A lock button 9 and a switch button 8 that partially covers the lock button 9 are attached to the outer surface of the front case 2 so as to be able to slide freely on the outer surface. 3a and 8b are shown in the guide holes 13a and 13 of the case 2.
Penetrating from b, polysecure resin switch moderation plate 1
4 into the mounting holes 14a and 14b respectively, and heat welding the protruding tips to attach the front case 2 to the switch 1 port 8.
and the switch moderation plate 14. At this time, as shown in FIG. 3, the polysecure resin lock button 9 is housed between the switch button 8 and the front case 2 so that a part of it protrudes from the window 8C of the switch button 8, and the lock button 9 is housed between the switch button 8 and the front case 2. has resilient push-up tongues 9a, 9 provided at both longitudinal ends thereof and extending outwardly with a slight downward inclination.
b, by pressing the protruding portion as shown in FIG.

9b is deformed to slightly expand and descends with elasticity. The tongue pieces 9a, 9b may extend inward. There are two pins 9c in the center of the lock button 9,
9d protrudes from the long holes 15a and 15 of the front case 2.
One of the pins 9c, which are inserted into the respective slots b and pass through the elongated holes 15a, is in contact with an arm portion (indicated by 0 in FIG. 3) of a locking piece 14c integrally formed on the side edge of the switch moderation plate 14. , and will move up and down in accordance with the up and down movement of the lock button 9. A triangular hooking protrusion 16 is provided on the inner side edge of the elongated hole 15a.
is formed, and the bulge-shaped part of the lock piece 14c engages with the protrusion 16 when the switch button 8 is normally closed, and when pressed by the pin 9c, the bulge-shaped part descends and the protrusion 1
6, and the locked state is released.

The other pin 9d inserted into the elongated hole 15b serves as a sliding guide for the lock button 9 and restricts its sliding along the elongated hole 15b.

This lock button 9 needs to be easy to operate regardless of the user's dominant hand. For example, as shown in FIG. 5, even when a finger H is placed on only one side of the lock button 9, the lock button 9 itself is long and soft, and there are push-up tongues 9a at both longitudinal ends. 9b is provided, whereas a pin 9C that presses the lock piece 14c that creates a locked state is provided.
is located in the center of the lock button 9, so if only the left end side is pressed, the left end side tongue piece 9a expands and is elastically deformed, and the left half of the lock button 9 is also significantly elastically deformed, and the right half, especially the right end. Regardless of the elastic deformation of the side tongue piece 9b, the pin 9c descends and the lock piece 14C is pressed to release the locked state. Conversely, if a right-handed user presses the right side, the opposite effect will occur and the locked state will be released.

The optimum position for protruding pin 9C for this purpose is lock button 9.
A position midway between the overall length of is preferred.

Therefore, no matter where the lock button 9 is pressed with a finger, the lock piece 14c is pressed down by the pin 9C, and the bulge at the tip is disengaged from the vertical surface of the triangular hook protrusion 16 of the elongated hole 15a, resulting in the locked state. is released, and then press switch button 8.
, the switch moderation plate 14 will slide. Elastic arms 14d and 14e are integrally formed at the lower end of the switch moderation plate 14, and engage the moderation pin 17 on the inner surface of the back case 2 in three stages to generate elastic force. In addition, a round hole 14f is provided in the center of the switch moderation plate 14 that slides in this manner, which will be described later (indicated by a broken line in FIG. 1).
The operating pin 18a of the switch section 18 is fitted, and the switch section 18 is slidably operated. Along with this, a hook-shaped portion 14g is integrally formed on the upper side of the switch moderation plate 14. This hook-shaped portion 14g has two stages of the switch moderation plate 14 whose upward sliding state is positioned in three stages.
In other words, when the power switch section 18 is turned on for the first time, it engages with the notch 19a at the right end of the seesaw plate 19, and rotates the edge block 7 in three stages, with the switch section 18 remaining in the ON state. Cut out the above notch 1 so that it protrudes.
This is for pushing up 9a.

In other words, the seesaw plate 19 is connected to the rotating pin 2 on the inner surface of the back case 2.
0 is fitted with a rotation hole 19b, and can be rotated around this pin 20. A pin 19b is provided at the left end, and this pin 19b penetrates into the horizontal slide hole 21a of the rotation operation lever 21. At the same time, when the seesaw plate 19 is fitted onto the rotating pin 20, the tip of the rotating pin 20 further protrudes from the seesaw plate 19. 21b.

Therefore, if the seesaw plate 19 rotates counterclockwise,
The pin 19b slides within the horizontal slide hole 21a of the rotary operating lever unit 21 and acts to push down the lever unit 21, while the lever unit 21 is
a vertical slide groove 2 engaged with the pivot pin 20;
Since the rotation is restricted by 1b, the rotation operation lever unit 21 ends up sliding downward.

An inverted-shaped elastic lever 2 is attached to the upper part of the rotation operation lever integrated 21.
1c is integrally formed, and its tip engages with a right-angled notch 7b provided slightly rearward of the pivot pin 7a of the sharp blade block 7, and the pivot pin 7a is connected to the front case 2.
It engages with rotation recesses 23 provided on both sides of the protruding window 22 of the scraper blade block 7.

Therefore, when the rotary operation lever unit 21 slides downward, the elastic lever 21c engaged with the right-angled notch 7b acts to press the notch 7b downward, but the sharp edge block 7 rotates. Since the blade block 7 is rotatably supported by the pin 7a, the blade block 7 rotates and closes the protruding window 2.
2, it will protrude at a right angle. At this time, while the elastic lever 21c moves downward, the notch 7b rotates, so the elastic lever 21 is elastically deformed inward in a slightly arched shape, and then, after the blade block 7 protrudes, it returns to its original position. At this time, a clicking sensation is generated, and the protruding state can be maintained.

Reference numeral 24 denotes a motor, and an eccentric stand 27 equipped with an eccentric pin 26 is attached to the rotating shaft 25, and is projected upward from the through hole 29 of the drive stand 28. In this state, screws 30 and 31 are inserted into the motor 2.
Screw into the threaded holes 32° and 33 in No. 4 and secure.

Reference numeral 34 denotes a drive conversion body made of polysecure resin, and four deformed S-shaped thin elastic legs 35 are integrally provided at the side ends in the reciprocating direction, and each leg 35 has two legs on each side connected by a mounting base 36. However, four round pins 37 are protruded from the lower surface of the mounting base 36, and are inserted into the mounting holes 38 of the drive base 28, and the drive converter 34 and the drive base 28 are temporarily fixed, and this connection In the attached state, the eccentric pin 26 is fitted into an elongated hole 39 (indicated by a broken line) on the back surface of the drive converter 34. Further, a drive rod 40 is integrally formed on the upper surface of the drive conversion body 34, and a hair catch plate 41, an inner blade push-up spring 42, and an inner blade mount 43 are sequentially attached to the drive rod 40, and a mounting bracket 44 is attached to the drive rod 40. Extraction has been stopped.

Reference numeral 45 denotes a semicircular arc-shaped inner cutter body that is detachably attached to the inner cutter mounting base 43. The drive base 28 and the drive converter 34 are temporarily connected to each other by the sum (T,) of the wall thickness of the drive base 28 (T1) and the wall thickness (T2) of the mounting base 36 of the drive converter 34.
A recessed groove 46 of .degree. For the press-fitting and locking force required at this time, it is appropriate for the material of the driving rhombus body 34 to be made of a soft or elastic synthetic resin, such as nylon or polyacetal resin.

In the second state, the protruding window 22 of the sharpening blade block 7 is closed by a shielding plate 47 formed on the front surface of the drive base 28 to prevent hair from entering. Further, elastic arms 48 extending from both ends of the drive base 28 are exposed through openings 49 opened at the mating surfaces of the front and back cases 2.3.
As shown in the figure, the tip projection 48a is engaged with a hook recess 50 on the inner surface of the outer cutter holder 5.

Therefore, in order to remove the outer cutter holder 5, the left and right walls are pinched as shown in FIG. 6, and then pulled up. As shown by the broken line in FIG. is removed from the hook recess 50, and the outer blade holder 5 can be removed. At this time, as shown in FIG. 7, a gap a is created at the base due to the inward deflection of the elastic arm 48.

Generally, hair particles try to enter the main body case 1 through this gap, but in this case, the shock-absorbing elastic plate 11
Since the upper surface of a and llb has elasticity and abuts against the base of the elastic arm 48, the above-mentioned gap can be prevented from occurring, and there is no need to attach a filler such as a sponge body to the conventional gap. .

When removing the outer cutter holder 5, use the elastic arm 4.
Sufficient lifting force is required to deform 8 inward. Generally, the finger rest is provided with a recess at the finger rest position of the outer blade holder 5 for this purpose, but this is undesirable as it gives discomfort and pain to the fingertips. The plates 12a and 12b are attached, and a meat relief recess 12c is formed on the inner surface at the position where the fingers hit most strongly.

12d, the elastic plates 12a and 12b are recessed in response to the fingertip force as shown in FIG. 6, and the finger rest forms a surface to prevent slipping. The fine irregularities 12e and 12f in the lower part of FIG. 6 effectively prevent slipping when the outer cutter holder 5 is attached.

Next, the power supply section will be explained in detail with reference to FIGS. 8 and 9.

8 and 9, 51 is a wiring board, a transformer 52 with a temperature fuse 5, a rectifier 53, and a rechargeable battery 54.
, a display light emitting diode 55, and a display current limiting resistor 56 are respectively soldered and mounted at the positions indicated by the dashed lines in FIG. Welded.

The wiring state is as shown in FIG.

As shown in FIG. 11, the switch unit 18 has an H-shaped movable contact plate 60 placed on the contacts 65 and 66 exposed on the lower surface of the wiring board 51, an operation plate 61 mounted on this, and a mounting frame 62 mounted from above. At the same time, the eight pins 63 protruding from the mounting frame 62 are inserted into the positioning holes 64 provided on the periphery of the switch part 18 of the wiring board 51, and only the pins 63 at the four corners are thermally deformed to be used as fixing means, and the remaining Four pins 63 protruding from the center are used as positioning pins for the rechargeable battery 54.

A conductive plate 67 with a zero-shaped tip is spot welded to one end of the rechargeable battery 54, and a plurality of long holes 69, 70.
1 is provided, and the elongated hole 69 is formed according to the total length of the rechargeable battery 54.
．． 70.71 from each position, and insert the U from below into the open state of the elongated hole 69, 70.71 that is created when this bending.
Temporary positioning can be achieved by inserting the character-shaped conductive plate 67 and pulling it upward, and soldering can be carried out as is. Also, the long hole 69. The provision of To, 71 also serves to prevent deformation stress from being transmitted into the wiring board 51 during bending. In addition, the back side of the switch part (1st
A large number of holes 72 are provided on the upper surface in Figure 2, and the contacts 65.6
6 is partially exposed to provide a heat dissipation effect when the contacts are opened and closed.

Next, a method for manufacturing the wiring board 51 will be explained.

In FIG. 13, first, conductive pieces 73 patterned based on the wiring diagram shown in FIG. 10 are interconnected and molded so that they do not fall apart. The base material of the conductive piece 73 is a thin plate made of copper-containing cupronickel alloy with a thickness of 0.12 to 0.2 mm, and is patterned by pressing or etching. Although the pattern shown in FIG. 13 is for one machine, it is convenient for post-processing to continuously form it into a hoop-shaped thin plate.

Next, this patterned conductive piece 73 is loaded into a synthetic resin injection mold, and a substrate 51 having a thickness of 2M shown in FIG. 9 is molded from glass fiber-containing ABS resin. In this state, the conductive pieces 73 are connected to each other and are not configured as a circuit, so they are cut by a press at the point indicated by 0 in FIG. 13. At this time, the stress due to the press work is applied to the wiring board 5.
However, in this case, by arranging the cut portion on the outer periphery of the substrate 51, for example, as shown at 74, 75, 76, cracks, chips, etc. due to the above stress can be easily promoted.
Deformation can be suppressed.

In particular, by detouring the conductive piece 73 to the outside of the substrate, the portion indicated by the reference numeral 74 can actively avoid the cut portion away from the substrate 51, and can improve the degree of freedom in pattern creation.

Further, the portion indicated by the reference numeral 76 is connected by making a detour to connect the conductive pieces 73, but the broken line portion is cut while leaving a certain length.

By cutting outside the board in this way, the wiring board 5
1 to a partially protruding piece, , to , , K.

When this wiring board 51 is assembled into the main body case 1, the press edge catches on the inner wall surface of the main body case 1, and a positioning action with elasticity is obtained. All you have to do is push it into case 1.

The above power supply part is a rechargeable power supply that is equipped with a transformer 52, but it has two types of power supply that are popular in recent years: a direct drive power supply using an external power supply, and a rechargeable power supply that is charged by an external power supply. In the case of a 2-way type, it is inconvenient to manufacture a separate wiring board from the standpoint of versatility and economy. Therefore, a method for manufacturing a wiring board that satisfies both will be described below.

The rechargeable power supply is as explained in Figure 10.13, but the circuit for the 2-way type is shown in Figure 15.
As shown in the figure. P+ is the so-called adapter side that converts the commercial power supply to the necessary DC low voltage, and consists of fuse TF, transformer T4, and diodes D, D2 that rectify the AC low voltage of transformer T4 to DC low voltage, and its output is The power is supplied to the main body side power source P2 through a plug P3 indicated by a broken line in FIG. Main unit side power supply P2 is charging current limiting resistor RI%
It consists of a rechargeable battery 54, a light emitting diode 55 for display, a current limiting resistor 56 for display, and a switch section 18, and the terminal of the motor 24 is connected to the output end. FIG. 17 shows a patterned state of this main body side power source P2. The pattern itself is the same as that shown in FIG. 13 of the rechargeable power supply described above, and the shape after injection molding is also the same, but the parts cut by press working (indicated by the numbers) are slightly different.

The major differences are as follows. In the one shown in FIG. 17, the first
6 Plug P as shown in figure.

Connecting pin 78. of the boat-shaped bottom case 4' is inserted and connected.
In contrast, in the case shown in FIG. 13, the conductive piece 80.81 connecting the power supply connecting plate 77 is press-cut and removed. , the leaf springs 82 and 83 are left in place, and the leaf springs 82 and 83 are configured to come into sliding contact with a plug blade 84 that is inserted into a commercial power outlet.

Therefore, the dedicated wiring board 51 for the rechargeable power supply and the 2-way
．． It is not necessary to mold each of the parts 51', and it is only necessary to slightly change the cutting position by press working, for example, by simply replacing the punch position of the press mold, which is economically advantageous.

In this method of manufacturing a wiring board, in which pre-patterned conductive pieces are injection-molded with synthetic resin as a mechanical strength structural material and embedded, it is important to note that the buried conductive pieces are bent into a curved shape due to the injection molding pressure. The substrate itself may warp due to distortion or a difference in shrinkage rate between the conductive piece and the synthetic resin. For this reason, when parts such as wide transformers or straight rod-shaped rechargeable batteries are mounted and mounted, gaps tend to occur between the board and these parts, causing parts to wobble and soldered parts to become incomplete, so this is not preferable. do not have.

Therefore, in this case, the surface of the wiring board 51 on which the components are mounted, that is, the surface 51a shown in FIG. 9, is almost completely covered with synthetic resin, while the surface on which the component lead wires are soldered In other words, holding ribs 87° 88, 89, 90 are provided to open most of the surface 51b that appears in FIG.
By extending 88, 89, and 90 in a straight line and intersecting each other, it is formed so that the warp due to the surface 51a side is pulled in the opposite direction and absorbed. Of course, it is possible to absorb this type of shrinkage strain by mixing insulating reinforcing materials such as glass fibers into the synthetic resin, but this is insufficient, so a linear shape with strong mechanical strength is used. By arranging the conductive pieces 73 in a lattice pattern with a large area within the frame, it is possible to improve the holding performance of the conductive pieces 73 during molding, making it easier to prevent positional displacement due to injection pressure, and also to prevent the conductive pieces 73 from being exposed within the frame. Since the conductive piece 73 is wide, it is possible to prevent thermal deformation of the synthetic resin by the tip of the soldering iron when soldering components and partial lifting of the conductive piece 73 due to this thermal deformation. The method for manufacturing the substrate can be applied effectively not only to electric shavers but also to rechargeable flagierite and other small electric devices.

Note that the power supply connection plate 77, 77' is the projecting piece 85 at both ends.
, 85' are temporarily assembled by elastically fitting them into recesses 86, 86' provided in both inner walls of the boat-shaped bottom case 4.4'. An example thereof is shown in FIG.

In addition, 91.92 in Fig. 14 indicates the rechargeable battery 54 and the motor 24.
93.94 is a cushioning material in the form of sponge or rubber tape that elastically presses the elastic plates 11a and 11b.
The hook-shaped hook is a protrusion for easy attachment to the case, and the notch formed on the mating surface of the two-part case 2.3 is for elastically deforming and hooking into the hole 95. , llb are deformed, the above-mentioned hooks expand and deform to hold the protrusions 93, 94 even more firmly, and the elastic plate 11a.

The amount of deformation of 11b can be compensated for. Also, for this purpose, the mating surfaces of the front and back cases 2.3 and the elastic plates 11a, llb
A gap S is provided between them as shown in FIG.

〔effect〕

According to the present invention having the above configuration, the elastic plates 11a and 11b, each having a recessed center on the inner surface, are attached to the mating surfaces of the flat box-shaped two-part case 2.3 along the mating surfaces.
It does not lose its flat box shape when subjected to external forces when carried or stored, and also prevents squeaks from occurring on the mating surfaces, and when in use, it has a gentle feel and is easy to grip. Furthermore, it not only provides an anti-slip effect, but also gives an unexpected appearance.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an embodiment of the present invention, Fig. 2 is an exploded view of the head of the embodiment, Fig. 3 is a cutaway cross-sectional view of a switch section of the embodiment, and Fig. 4 is a switch section of the same embodiment. An explanatory diagram of the operating state of
Fig. 5 is an explanatory diagram of the operating state of the switch part in irregular usage conditions, Fig. 6 is a vertical sectional view of the head of the same embodiment, Fig. 7 is a diagram of the outer cutter holder mounting structure of the same embodiment, Fig. 8 is a perspective view of the drive and power supply assembly of the same embodiment, Fig. 9 is an exploded perspective view of the power supply part of the same embodiment, and Fig. 10 is a circuit diagram of the power supply part.
Fig. 11 is a sectional view of the switch section of the power supply section, Fig. 12 is an exploded view of the switch section, Fig. 13 is a plan view of the wiring board of the power supply section, and Fig. 14 is a sectional view of the main body of the same embodiment. , 15th
The figure is a circuit diagram of another embodiment of the power supply section of the present invention, No. 16.
17 is a plan view of the wiring board of the same embodiment, FIG. 18 is a lower vertical sectional view of the same embodiment, and FIG. 19 is an embodiment of the present invention. FIG. 9 is a rear perspective view of the drive power supply assembly shown in FIG. 8; 2.3...Two-part case 11a, llb...Elastic plate.

Claims (1)

[Claims] An edge unit that is rotated and retracted and a sliding operating member that operates the unit are arranged on the same surface of the main body case, and a finger abutting portion is placed between the edge unit and the operating member. An electric razor provided.