JPS6231098Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of an electromagnetic drive device that has a power switching mechanism for switching the power source, such as the frequency or voltage, as necessary for electric shavers, electric hair clippers, etc., and is particularly simple in structure and easy to assemble. It is an object of the present invention to provide a power supply switching mechanism that is easy to use and has high electrical insulation. A conventional power supply switching mechanism of this type includes British Patent No. 1009659. In other words, a coil winding frame around which an excitation coil is wound is inserted into the magnetic core, the end of the coil protruding from a part of the coil winding frame is wired to a small changeover switch set, and this changeover switch set is divided into two parts. It is arranged on the side surface of the main case and held between the joint surfaces of the main case. However, in the above power supply switching mechanism, many coil ends must be connected to the changeover switch set, which makes the wiring complicated and may easily lead to incorrect wiring.Furthermore, the coil ends must be connected during assembly. It is necessary to have some slack in consideration of variations, but
If there is slack at the end of the coil, there is a drawback that the wired coil gets in the way when attaching the switch assembly to the main body case. This invention solves the above-mentioned drawbacks. A plurality of wire rods are erected at the lower end of the coil winding frame attached to the magnetic core, and the end of the coil is wound around the wire rods for support. It is fixed to the switching board together with the end of the coil. Below is an example of applying this idea to an electric shaver.
This will be explained using drawings. In FIG. 1, 1 is a left case piece, 2 is a right case piece, and a case A is constructed by holding a U-shaped middle case piece 3 between them while facing each other. This case A includes an electromagnetic drive mechanism B , a power switch C ,
A sharpening blade assembly D is built-in. The electromagnetic drive mechanism B has a U-shaped laminated magnetic core made of silicon steel plate (hereinafter referred to as core) 4, which is fitted with a coil winding frame 6 around which an excitation coil 5 is wound, and a pair of mounting frames 7 fixed to the upper part of the coil winding frame 6. Attach the support shaft 8, and
A vibrator 9 driven by the iron core 4 is suspended therein. As shown in FIG. 2, the coil winding frame 6 is made of a synthetic resin with high electrical insulation properties such as polyamide resin or polycarbonate resin, and has a standing wall 6a surrounding the bottom of the iron core 4 at its lower end, and is positioned on a switching board 10, which will be described later. A supporting protrusion 6b to be supported and a cylindrical protrusion 6c into which a wire 11 made of, for example, a conductive material is inserted are integrally molded. An excitation coil 5 is spirally wound and supported on the wire 11, and the end of the coil 5 and the other end are electrically fixed to a terminal 16 formed on the switching board 10 by soldering or the like. Note that, as described above, since the end of the coil 5 and the terminal 16 of the switching board 10 are electrically connected, the wire 11 does not necessarily have to be conductive. On the top surface of the switching board 10, one end is a power switch C.
Contact plate 12 and lead wire 1 in contact with contact point C ₂ of
3. The power supply terminal plates 14, 14 are installed, and the (fifth
(See figure a) On the bottom surface is a group of terminals 15 (15a, 15
b, 15c, 15d), 16 (16a, 16b,
16c, 16d) are printed and wired, and a switching knob 17 and a power supply terminal pin 18 are attached. (See Figure 5c) The switching knob 17 has an Ω-shaped cross section and a collar 1 at the end.
7a, and a protrusion 17b stands up from the middle bottom. By inserting this protrusion 17b into a mounting hole 10d formed in the switching board 10 and crushing the tip of the protrusion 17b protruding from the board 10 via a washer 19, the switching knob 17 is rotatably mounted. Furthermore, two terminal boards 20 are buried in a V-shape on the side of the flange 17a of the switching knob 17 that faces the switching board 10.
It contacts the terminal 15 which is printed and wired at 0 and switches the voltage. Furthermore, since the wire 11 around which the end of the excitation coil 5 is wound is soldered to the terminal 16 together with the end of the coil 5, there is no risk of the excitation coil 5 being disconnected, and the coil The winding frame 6 and the switching board 10 can be relatively fixed in a fixed position. The wiring diagram of the switching circuit is shown in Fig. 6. One end of the excitation coil 5 is connected to the power supply terminal pin 18 connected to the power supply.
The other end is connected to the power supply terminal pin 18 through the power switch C , and the terminal 15,
16a is connected. In other words, switching knob 1
Turn 7 to the right, 15a and 15b as shown in the figure.
15c and 15d are short-circuited to create a parallel circuit of exciting coil 5, which can be used with a power supply voltage of 110V.
If you turn it to the left, the space between 15a and 15b will open, and the space between 15c
and 16a are short-circuited to create a series circuit of exciting coil 5, which can be used at 220V. The above-mentioned shorting and opening between the terminals is performed by a terminal plate 20 embedded in the collar portion 17a of the switching knob 17. Reference numeral 21 denotes an insulating plate made of synthetic resin with excellent insulation resistance, such as polycarbonate, and is attached to the bottom 41 of the magnetic core 4 and _the left and right case pieces 1 and 2 (see Figures 2 and 4). adjusts the amplitude of the vibrator 9 using an amplitude resonance spring. A drive rod 23 is erected at the tip of the vibrator 9, and is formed to protrude from a window 25 in an upper wall 24 extending from the top of the left case piece 1 to the top of the right case piece 2. Along with this window 25
The hair stopper packing 26 is attached to the holder. 27 is an elastic foam sheet, and this foam sheet is folded in half and clamped on both sides of the electromagnetic drive unit.
Acts as vibration prevention. The electromagnetic drive mechanism B having the above configuration is constructed by inserting the fixing screw 28 into the left case piece 1 through the screw hole ₇₁ of the mounting frame 7 and the through hole ₂₉ provided in the bottom part 41 of the iron core 4. It is attached by screwing into a protrusion 30 protruding from 1. Reference numeral 31 denotes an inner blade support, and a spring receiving tray 32 is placed on the stepped portion 23a formed at the tip of the drive rod 23. Furthermore, the inner blade pressing spring 33 and the inner blade support 31 are sequentially assembled, and the stopper 34 is attached to the inner blade. It is attached to the drive rod 23 by being fixed to the stop groove 23a of the drive rod 23 from above the blade support 31. power switch
C is housed and fixed in a small gap in the case A by vertically connecting the operation part _C1 and the contact part _C2 . The sharpening blade assembly D is attached to the right case piece 2 as an independent assembly with a screw 35, and a drive pin 36 protruding from a part of the vibrator 9 is connected to the assembly D. By fitting into the connecting hole 37, the movable blade 38 is driven, and the fixed blade 39
It cuts long hair with a movable blade 38 and a fixed blade 39.
The cutting edge protrudes from the right case piece 2. In addition, 40 in the figure is a decorative member, and a hook-shaped protrusion 4 that is elastically deformed in the engagement hole 1b provided on the outer wall of the left case piece 1 is attached.
It is attached by engaging 0a, and is chrome plated for decoration. 4
Numerals 1 and 42 are tightening screws for joining the left and right case pieces 1 and 2, of which the tightening screw 41 passes through the through hole 1c provided in the upper part of the left case piece 1 and tightens the right case piece 2. The tightening screw 42 passes through the through hole 2b provided in the lower part of the right case piece 2, and is screwed into the tightening hole 1d of the left case 1.
By tightening the lower parts from opposite directions, U
Distortion in the gripping state of the letter-shaped middle case piece 3 is corrected. According to this invention having the above-mentioned configuration, the ends of the coil are reinforced by being wound and supported by the coil erected from the coil winding frame, and there is no risk of wire breakage, especially in this embodiment. Excitation coil 5
The ends of the wire rod 11 are wound and fixed around the wire rod 11 inserted into the support protrusions 6b and 6c of the coil winding frame.
If this is soldered to the switching board 10, disconnection between the board 10 and the coil 5 can be further prevented. In addition, the present invention simplifies wiring, improves ease of assembly, prevents incorrect wiring, and prevents the ends of the coil from becoming unnecessarily sagging.Moreover, the ends of the coil are wound spirally around the wire. Since it can be attached, it can absorb slack well.
Furthermore, according to this invention, since a vertical wall surrounding the bottom of the magnetic core 4 is provided at the lower end of the coil winding frame 6 around which the excitation coil 5 is wound, insulation of the bottom of the core 4 is ensured.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an electric shaver implementing this invention, Fig. 2 is a partially exploded view of the electromagnetic drive mechanism of the same embodiment, Fig. 3 is a front sectional view showing the assembled state of the electromagnetic drive mechanism, and Fig. 4 The figure is a cross-sectional view of FIG. 3, FIG. 5 is an explanatory diagram of the switching board, and FIG. 6 is a wiring diagram of the switching board. 4... Magnetic core, 5... Excitation coil, 6... Coil winding frame, 6a... Vertical wall, 6b, 6c... Support projection, 10... Switching board, 17... Power switching knob.

Claims (1)

[Scope of utility model registration request] At the lower end of the coil winding frame 6 attached to the magnetic core 4,
A plurality of wire rods 11 are erected, and the ends of the coils 5 are wound and supported around the wire rods 11, and the wire rods 1
1 is fixed to a switching board 10 together with an end of the coil 5. An electromagnetic drive device having a power switching mechanism.