JPH0112700Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of electromagnetic drive devices such as electric razors and electric hair clippers, and in particular aims to provide a device that is simple in structure, easy to assemble, and has excellent strength against vibrations caused by electromagnetic drive. purpose.

In this type of electromagnetic drive device, an electromagnetic drive mechanism that vibrates at high speed and a board are housed inside the main body case, and the wire rod on the electromagnetic drive mechanism side is inserted into a through hole in the board and soldered. The ease of assembly was poor, and the connection strength against repeated bending fatigue caused by high-speed vibration was not sufficient.

Therefore, this idea was made in view of the above problem, and a plurality of support protrusions are erected at the lower end of the coil winding frame attached to the magnetic core, and a substrate is fixed to the tips of the protrusions. The winding start side terminal wire and the winding end side terminal wire of each of the pair of coils wound on the coil winding frame are led out from the lower end of the coil winding frame at opposing positions of the coil winding frame, and each of the above-mentioned opposing terminals is led out from the lower end of the coil winding frame. Both sides of the board corresponding to the wires have notches formed inward of the board and around which terminals on the board side are respectively arranged, and each of the terminal wires is connected to each of the notches. They are inserted simultaneously from the opening side and fixed to the terminals by soldering.

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 making them face each other and holding a U-shaped middle case piece 3 between them. 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 a pair of excitation coils 5, 5 are wound. Attach the support shaft 8 to the mounting frame 7,
A vibrator 9 driven by the iron core 4 is suspended on this support shaft 8 .

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 a switching board 10 (to be described later) attached to the coil winding frame 6. A support protrusion 6b fixed to the winding frame 6, and conductive wire rods 11, 11a, 11b fixed to the ends of each winding start side and each winding end side of the pair of excitation coils 5.
A cylindrical projection 6c into which is inserted is integrally molded.

Switching board 1 supported and fixed to the coil winding frame 6
On the top surface of 0, one end is the contact part C ₂ of the power switch C.
A contact plate 12, a lead wire 13, and power supply terminal plates 14, 14 are attached (see FIG. 5a). Further, on both sides of the substrate 10 corresponding to each of the wire rods 11, there are four notches K formed in a direction perpendicular to the electromagnetic driving direction and inward of the substrate 10, and on the lower surface of the substrate 10. terminal group 15,
15a, 15b, 15c, 15d, terminal groups 16, 16a, 16b, 16c, 16 around each notch K
d is printed and wired, and the switching knob 17
and a power supply terminal pin 18 are attached. (5th
(See Figure c) The switching knob 17 has a U-shaped cross section and a flange 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. Further, 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 printed and wired at 0 and switches the voltage.

Each terminal wire 11 is positioned in each corresponding notch K from the opening side of the notch, and the terminal 16 and wire 11 are
and are fixed by soldering.

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 tucking 26 is fitted on the holder. 27 is an elastic foam sheet, which is folded in two and sandwiched from 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 screws 28, 28 into the left case piece 1 into the screw hole ₇₁ of the mounting frame 7 and the through hole 29 provided in the bottom ₄₁ of the iron core 4. It is attached by screwing into a protrusion 30 protruding from the case piece 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 push-up spring 33 and the inner blade support 31 are sequentially assembled, and the stopper 34 is installed inside. 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. The power switch C is housed and fixed in a small gap in the case A by vertically connecting the operating section _C1 and the contact section _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, and then the upper part,
By tightening the lower parts from opposite directions, U
Distortion in the pinched state of the letter-shaped middle case piece 3 is corrected.

According to this invention having the above configuration, the terminal wires 11 of the pair of coils 5, 5 wound around the coil winding frame 6 of the electromagnetic drive mechanism B are connected to the substrate 10 in a direction orthogonal to the vibration direction of the electromagnetic drive mechanism B. A cut is formed inward from the side of the wire, and the wire is positioned in the cut K around which the terminal 16 is arranged, and is fixed to the terminal 16 by soldering, so that the wire is inserted into the through hole. The workability of soldering the board and the wire material has been greatly improved compared to the conventional method of soldering the board and the wire, and by soldering from the opening side of the notch, the solder is fixed all over the inside of the board. Since the notch is formed in a direction perpendicular to the vibration direction of the electromagnetic drive, the wire rod located within the notch can be supported by the substrate in the vibration direction. The opening side of the notch, that is, the side not supported by the board, is perpendicular to the vibration direction, so the connection part is not affected by repeated bending fatigue caused by vibration. Therefore, it is possible to provide an electromagnetic drive device with excellent assembly performance and improved connection strength.

[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, 6b, 6b... Support projection, 10... Switching board, 16... Board side terminal, K... Notch.

Claims (1)

[Scope of utility model registration request] The terminal wires 11 of the pair of coils 5, 5 wound around the coil winding frame 6 of the electromagnetic drive mechanism B are formed by cutting inward from the sides of the substrate 10 in a direction orthogonal to the vibration direction of the electromagnetic drive mechanism B. The terminal 1 is located in the notch K around which the terminal 16 is arranged.
6. An electromagnetic drive device characterized in that 6 and 6 are respectively fixed by soldering.