JPS6032732Y2 - electromagnet device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnetic device used as a drive device for electric shavers, etc., and in particular, the device is easy to assemble, has a small number of parts, and can be reliably assembled and fixed into the main body. It was designed so that

Hereinafter, one embodiment of the present invention will be described by taking an electromagnet device 1 of a vibrating electric shaver as an example.

2 is a U-shaped fixed iron core, 3, 3 is a pair of rectangular tube-shaped synthetic resin winding frames, and this is equipped with an excitation coil 4゜4.
is wound, and this is inserted into both legs of the U-shaped fixed iron core 2.

At the lower ends of the winding frames 3, 3, there are terminal pin mounting protrusions 5.
5.5.5 are provided protrudingly in pairs.

The mounting protrusions 5°5, 5.5 have an overall dimension B that is slightly longer than the lower end surfaces 5', 5' of the protrusions and protrudes by the dimension A.
Ribs 6°6 and 6.6 are respectively attached.

Each of the projections 5.5 has a lower end surface 5',
5'...Pin mounting holes 7, 7 toward the inside
...... are formed, and these mounting holes 7, 7...
Terminal pins 8.8 and 8.8 are press-fitted and fixed to the terminal pins 8.8 and 8.8, respectively.

Further, on the outer surface side of each mounting projection 5.5, both ends of the winding start and winding end wires of the excitation coils 4, 4 are wound around the terminal pins 8°8. Guiding grooves 9, 9, 9.9 are formed to facilitate guiding when attaching.

Therefore, the respective starting ends and terminal ends of the exciting coils 4, 4 wound around the winding frames 3, 3 are passed through the guiding grooves 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9. 8.8. 8 is wrapped two or three times.

Of the four guiding grooves, the guiding groove for winding start 9.9.
The rear ends of 9 are tapered 10 and 10, respectively, to ensure that the winding wire is wound from the surface of the winding frames 3 and 3.

After the winding, the wire is placed in a solder bath 11 and soldered as shown in FIG.

Although not shown in the drawings, 12 has a connecting terminal part for connecting to an AC power supply cord attached to a part thereof, and a circuit in which both the excitation coils 4 and 4 are printed in series or parallel, or the electromagnet device 1 is connected to a high voltage This is a printed circuit board on which a circuit for switching the excitation coils 4, 4 in series and parallel is printed in order to operate at either low voltage or low voltage.

and. The printed circuit board 12 has pin insertion holes 13, 13, into which the terminal pins 8, 8°8.8 are inserted.
is provided.

Reference numeral 14 denotes a pair of switch contacts that are turned off and on from the AC power supply by a drive switch (not shown).

The terminal pin 8. 8. 8. 8 and excitation coil 4 respectively.
.
When the printed circuit board 12 is placed in the winding frame 3, the ribs 6.6, 6, 6 on the winding frame side come into contact with the surface of the printed circuit board 12 as shown in FIG.
．． In particular, when the fixed core 2 is attached to the main body case 15, the distance C between the center of the screw insertion hole 17 of the fixing screw 16 and the printed circuit board 12 is kept constant.

The movable core 1'' side of the electromagnet device 1 is constituted by a movable core pivoted between a pair of frame fittings 19 and 19, which are fixed to the upper end of the fixed core 2 by means such as rivets 18 and 18. 20 and an armature spring 21° 21 that presses it.

The upper end of the movable iron core 20 has an inner cutter 2 that comes into sliding contact with the outer cutter 27.
8 is installed.

The other two fixing screws 2 are attached to the frame fittings 19 and 19.
An insertion hole 23.23 for 2.22 is provided.

Reference numeral 15 denotes a fitting 12 in which both ends of the printed circuit board 12 are press-fitted into the lower part of the main body case which is often split in half as described above.
4.24 are formed, and the three fixing screws 16. 22.22 A threaded stem (not shown) for manual use is formed.

As described above, when the printed circuit board 12 is attached to the lower ends of the winding frames 3, 3, the electromagnetic device 1 will automatically connect the fixed core 2 when both ends of the printed circuit board 12 are fitted into the fitting grooves 24, 24 of the main body case 15. screw insertion holes 17 and frame fittings 19.
Both the screw insertion holes 23 and 23 on the 19 side coincide with the aforementioned screw base cylinder on the main body case 15 side (not shown).

This is because the ribs 6.6, 6.6 of the winding frames 3, 3 maintain a predetermined distance B between them and the printed circuit board 12.

Therefore, as shown in FIG. 1, the distance C between the insertion part of the printed circuit board 12 and the mounting part of the fixed iron core 2 is completely fixed, and the mounting screws 16, 22, 22 are then inserted smoothly, and the electromagnet device 1 is fixed. It is reliably fixed to the main body case 15 at a proper position, and there is no possibility of improper installation.

By the way, in the present invention, the terminals of the excitation coils 4, 4 are wound and soldered directly around the terminal pins 8, 8..., and these terminal pins 8, 8...... are connected to the printed circuit board 12. Although it is considered to be an easy electrical connection process in which the pins are inserted into the pin insertion holes 13, 13, and connected to a printed circuit network, conventionally, as shown in FIG. 6, the winding frame 3, Wiring connection between the excitation coil 4.4 wound around 3 and the printed circuit board 12 was made using separate lead wires 25 and 25.

That is, one ends 25' and 25' of the lead wires 25 and 25 are connected to the winding start and winding ends of the excitation coils 4 and 4 and soldered, and the ends of the lead wires 25 and 25 are connected with an insulating tape 26. In this method, the lead wires 25 and 25 were wound and fixed on the surface of the excitation coil, and the other ends 25'' and 25'' of the lead wires 25 and 25 were fixed to the circuit section of the printed circuit board 12 by soldering.

Therefore, the lead wire 25, 25 tape 26 and the number of parts are large, and the complicated work of having to solder both ends of the short lead wire 25, 25 is required, which is inferior in terms of cost and workability. Ta.

However, the present invention has practical effects that easily solve the above disadvantages.

As described above, according to the present invention, at the lower end of the winding frame made of synthetic resin for winding the excitation coil forming the stator side of the electromagnet device, there is a pair of protrusions for attaching terminal pins, as well as a pair of protrusions slightly longer than the protrusions. Since a pair of protruding ribs are provided, the ribs serve as spacing pieces to maintain a certain distance between the printed circuit board positioned below the stator and the lower end of the winding frame, so that both ends of the printed circuit board are It can be inserted into the mounting groove of the main body case without slipping, making assembly easy.

Also, when fixing the electromagnet device to the main body case, the mounting hole for the fixing screw and the screw tightening part on the main body case side match up, making it possible to securely fix it in the correct position, making assembly easier. Work efficiency can be improved.

Then, the winding start and winding end wires of the excitation coil are directly connected to the terminal pin attached to the lower end of the mounting protrusion, and then the terminal pin tip is inserted into the pin insertion hole of the printed circuit board and fixed there by soldering. It has excellent workability as it makes an electrical connection between the excitation coil and the printed circuit board, and requires fewer parts than the conventional method, which uses a separate intermediate lead wire for electrical connection between the excitation coil and the printed circuit board. In addition, an electromagnetic device can be provided which promises a significant improvement in terms of cost.

[Brief explanation of the drawing]

Figure 1 is a front view of the electromagnet device of the present invention when installed in the main body case, Figure 2 is a structural front view of the electromagnet device body, and Figure 3 is a structural perspective view showing the winding frame for winding the excitation coil. ,
Figure 4 is an explanatory diagram showing the winding and soldering process between the excitation coil and the terminal pin, Figure 5 is an explanatory diagram showing the electrical connection process between the terminal pin and the printed circuit board, and Figure 6 is an explanatory diagram showing the excitation process using the conventional method. It is a figure explaining the connection mode of a coil and a printed circuit board. 3.3... Winding frame, 5. 5. 5.5...
・Protrusion for attaching terminal pin, 6. 6. 6. 6...
...Rib, 8,8゜8.8...Terminal pin, 4
, 4... Excitation coil, 12... Printed circuit board, 13, 13, 13.13... Pin insertion hole, 9.9. 9. 9...Guiding groove.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of protrusions for attaching terminal pins and a rib slightly longer than the protrusions protrude from the lower end of a pair of winding frames made of synthetic resin, and are attached to the lower end surface of each of the protrusions. The winding start and winding ends of the excitation coil to be wound around each winding frame are connected to the terminal pins, and the pin insertion holes of the printed circuit board are arranged so that the lower ends of each of the terminal pins are brought into contact with the lower end surfaces of the ribs. An electromagnetic device that is inserted into and soldered. 2. The electromagnet device according to claim 1, wherein grooves for guiding the winding start and end wires of the coil are provided on one side of the terminal pin attachment projection, respectively.