JPS5810323Y2 - bobbin for coil - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a coil bobbin around which a signal coil or the like for inducing an engine ignition signal voltage is wound.

Hereinafter, a description will be given of an embodiment in which this type of coil bobbin is applied to an engine ignition power distributor.

That is, in FIGS. 1 and 2, 1 is the /S housing of the power distributor, 2 is a rotating shaft supported on this housing 1 via a bearing 3, and 4 is a rotating shaft supported on this rotating shaft 2 via a bearing 5. This is a movable plate rotatably supported by a vacuum advance angle device 6.

7 is 20. A ring-shaped rubber magnet 8 is attached to the movable plate 4.
The stator is fixedly held by rivets 9 through the stator, and four magnetic pole portions 7a are formed at equal intervals on the outer periphery of the stator.

10 is a rotor formed with four magnetic pole parts 10a that can be opposed to these magnetic pole parts 7a with a predetermined gap therebetween; 11 is a cylindrical body loosely fitted to the rotating shaft 2, and the rotor 10 is fixed thereto; ing.

Reference numeral 12 denotes a resin plate fixed within the housing 1 with screws, and is molded by injecting synthetic resin into upper and lower molds.

12a is a pair of mounting parts, 12b is a mounting hole, 12C is a U-shaped bobbin in cross section with flanges 12d on both sides, 12e
12f is a terminal portion 12g1 is a winding start terminal piece, 12g2 is a winding end terminal piece, and 13 is a grommet fitted to the terminal portion 12f. , 14 is a signal coil wound around a bobbin 12C, and 15 is an ignition circuit housing fixed to the side mounting portion 1a of the housing 1 with screws 16, in which an ignition circuit composed of electronic components and the like is built-in. ing.

17 is a cap of the power distributor.

The output end of the signal coil 14 is wound around and soldered to the winding start and winding end terminal pieces 12g1 and 12g2, and these terminal pieces 12gl and 12g2 are connected to the terminal section 1.
2 Connected to the female terminal inside C.

This female terminal is fitted into the female terminal of the ignition circuit housing 15, so that the signal coil 14 and the ignition circuit are electrically connected.

The operation of this embodiment will be explained.

When the rotating shaft 2 is rotated by the engine and the rotor 11 is rotated, its magnetic pole part 11a approaches the magnetic pole part 7a of the stator 7,
Continuously repeat the motion of completely facing and separating.

Then, since the amount of magnetic flux linkage of the signal coil 14 changes, an ignition signal voltage having a positive and negative waveform is induced in the signal coil 14 based on this magnetic flux change.

This ignition signal voltage is applied to the terminal piece 12g from its output lead-out end.
l, 12 g2 The signal is led out to the female terminal of the ignition circuit housing 15 through the g2 female terminal, and is input to the ignition circuit.

Thus, the ignition circuit induces a high voltage for ignition in the ignition coil.

Now, here, the resin plate 12 and the bobbin 12C are integrally molded using a mold as described above, and the pair of attachment parts 12a formed on this resin plate 12.
The protruding position and the protruding direction of the terminal portion 12f are determined depending on the mounting position of various parts mounted in the housing 1, such as the stator 7 and the rotor 10, and the side mounting portion 1a of the housing 1.
This is inevitably determined by the mounting position of the ignition circuit housing 15 fixed to the ignition circuit housing 15, etc.

Further, as shown in FIG. 3, the molds for the resin plate 12 including the bobbin 12C are preferably upper and lower molds 18 and 19 symmetrical about the line of symmetry X-Y passing through the mounting portion 12a.

If the holding position of the winding start terminal piece 12g1 is determined as shown in FIG. 2 in consideration of the above points, then the winding start terminal piece 12g is attached to one of the flanges 12d of the bobbin 12C from its innermost diameter part.
0) 12 The direction of e is automatically determined.

However, the direction of this slit 12e (direction of arrow A shown in FIG. 3) does not necessarily match the direction of extraction of the mold 19 (direction of arrow A in FIG. 3), and therefore it is impossible to integrally mold the slit 12e. It was.

Therefore, in the embodiment of the present invention, as shown in FIG. By forming the protruding portion, the mold 1 is formed.
9 can be pulled out in the direction of the arrow, and one flange 12d of the bobbin 12C has a fan-shaped slit (12e) which is shallow in depth and communicates with the winding start terminal piece 12g1, which is integrally molded at the same time as the resin plate 12. It will be possible.

Therefore, in order to wind the signal coil 14 around the bobbin 12C of the resin plate 12, one output lead-out end of the signal coil 14 is wound around the winding start terminal 12g1, and the signal coil 14 is guided to the innermost diameter part while being held within the fan-shaped slit 12e, and is wound many times. Wind.

After the signal coil 14 has been wound a predetermined number of times, the other output lead-out end is wound around the winding terminal piece 12g2, and the terminal pieces 12g1 and 12g2 are soldered to complete the signal coil 14.

As described above, by forming the slit 12e on one of the flanges 12d of the bobbin 12C, the overlapping winding operation at the beginning of winding of the signal coil 14 can be made extremely easy, and furthermore, the overlapping winding portion can be prevented from being disturbed. It is possible.

Incidentally, this invention can also be applied to a bobbin for a coil used for other purposes than the signal coil 14.

As described above, in this invention, the slit for guiding and holding the lead end of the coil can be integrally molded into the flange of the bobbin at the same time as the bobbin, regardless of the shape of the bobbin.
It has the advantage that the slit can be easily formed, the overlapping work at the beginning of winding of the coil is simplified, and disturbances in the overlapping winding portion can be reliably prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention, Fig. 2 is a perspective view of the resin plate 12, and Fig. 3 is a general slit 1.
FIG. 4 is a plan view showing the state in which the slit 12e according to this invention is formed. In the figure, 1 is a housing, 1a is a mounting part, 2 is a rotating shaft, 4 is a movable plate, 7 is a stator, 8 is a rubber magnet, 10 is a rotor, 11 is a cylinder, 12 is a resin plate,
12a is a mounting part, 12b is a mounting hole, 12C is a bobbin, 12d is a collar part, 12e is a slit, 12f is a terminal part, 12gl, 12g2 are terminal pieces, and 18.19 is a mold. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In the case where a bobbin having a U-shaped cross section with flanges on both sides is formed using a mold, the lead end at the beginning of winding of the coil in the drawing direction of the mold is placed on the winding cylinder side of the flanges. A bobbin for a coil, characterized in that a slit is formed to guide and hold the winding into the cylindrical portion.