JPS6016787Y2 - Day distributor - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology suppresses radio noise using a capacitor provided in a distributor.

This invention relates to a distributor in which a capacitor for contact arc extinguishing is interposed between the movable contact and the casing ground. This invention relates to a distributor that is designed to seal out radio noise in the low frequency range by using metal foil that forms a capacitor.

<Prior art> Generally, a capacitor whose other end is grounded is connected to the movable contact of an engine distributor, and this capacitor prevents sparks from occurring between the contacts when the movable contact and fixed contact are disconnected. There is.

In addition, as in JP-A-52-113437, a capacitor is provided on the side electrode of each cylinder to reduce high-voltage distribution loss, and as in JP-A-53-4653, a high-voltage current can be generated quickly and quickly. In order to provide a concentrated supply of spark plugs, the same number of capacitors as the side terminals of the distributor gap are built in at a position downstream of the distributor's rotor gap, and these capacitors are connected to the spark plugs connected to each side terminal. Some are configured to be parallel to the spark gear pots.

<Problems to be solved by the invention> However, although the conventional distributor described above reduces energy loss associated with power distribution, the capacitor is connected between the side electrode and the ground, Even if the ground side electrode is installed around the entire circumference of the distributor cover, it does not effectively suppress the spark itself that occurs between the movable and fixed contacts of the distributor, and the ground electrode indirectly However, in the event that sparks occur, they cannot be electrically shielded to prevent noise.

The purpose of this invention is to solve the problems of the distributor based on the prior art described above as a technical problem, and to provide an excellent distributor that can reliably prevent the emission of radio noise and is beneficial to the field of engine use in various industries. That is.

<Means/effects for solving the problem> In accordance with the above-mentioned purpose, the structure of this invention, which is based on the scope of the above-mentioned utility model registration claim, is to prevent the generation of sparks at the contact point in order to solve the above-mentioned problem. A capacitor connected to the movable contact and the casing ground is spread around the contact, and the metal foil of the capacitor prevents radio noise from being radiated to the outside by surrounding the contact. It is a technical means that can be used to block the

<Embodiment - Configuration> Next, an embodiment of this invention will be described below based on the drawings.

FIG. 1 shows the cap of the distributor of this invention in cross section, and FIG. 3 shows the electrical circuit of the distributor.

1 is a capacitor that embodies the gist of this invention, and is attached to the inner surface of a distributor cap (hereinafter referred to as the cap) 2, and is spread out as shown in Figure 2 and is attached in a layered manner over the entire circumference. The outermost layer in contact with the inner surface of the cap 2 is a metal foil 3, the inner side thereof is an electrolyte-impregnated paper 4 serving as an insulator, a metal foil 5, and the innermost layer is an insulating paper 6.

When the cap 2 is attached to the distributor body (not shown), the capacitor 1 surrounds the fixed contact 7 and the movable contact 8 (shown in Figure 3), and has the movable contact 8 at the tip. The dimensions and mounting position of the capacitor 1 are determined so that the breaker arm 9 and the capacitor 1 do not come into contact with each other.

Further, an electric wire 10 is attached to the lower end of the metal foil 3 outside the capacitor 1.
However, an electric wire 11 is connected to the inner metal foil 5, the electric wire 10 is grounded to the main body of the distributor, and the electric wire 11 is connected to the primary edge lead-in terminal 12.

The primary edge lead-in terminal 12 is connected to the breaker arm 9 and to the primary coil 14 of the ignition coil 13, as shown in the circuit diagram of FIG. It is connected to the battery 17 via the battery 17.

On the other hand, the center cord 19 connected to the secondary coil 18 of the ignition coil 13 is fitted into the center base 21 embedded in the center protrusion 20 of the cap 2 via a terminal.

A contact piece 22 that contacts a center electrode (not shown) is provided below the center cap 21 -, and the contact piece 22 is connected to the center cap 21 via a center coil 23 .

The center coil 23 is a normal contact piece 22
It is provided in place of the support spring of the ignition coil, and unlike a conventional simple spring, it has an appropriate inductance to prevent the generation of radio noise on the secondary side of the ignition coil.

Therefore, the center coil 23 is firmly fixed to be electrically connected to the center base 21 and the contact piece 22, and an insulating film is applied to the coil winding portion to prevent electrical discharge between the coil rings. There is.

Further, side caps 25 are embedded in a plurality of side protrusions 4 arranged on the upper surface of the cap 2, and a side cord 27 connected to a plug 26 is fitted and connected to each side cap 25 via a terminal. be done.

A side electrode 28 protruding into the cap 2 is disposed below each side cap 25.

The side electrode 28 and the side cap 25 are not only electrically connected, but also connected by a side coil 29 having a certain inductance, and this portion also prevents the generation of radio noise.

This side coil 29 is embedded and integrally molded within the cap 2, and the coil rings are insulated by the cap molding material to prevent electrical discharge between the rings.

In order to make the center coil 23 and the side coils 29 have a predetermined inductance, the upper end of the contact piece 22 may be inserted into the coil to serve as a coil core, and the side coil 29 may also have a coil core inserted and integrally molded. can.

Alternatively, the side coil 29 and the coil core may be integrally molded from resin and driven into the cap 2.

<Embodiment - Effect> In the above-described configuration, when the ignition key 16 is connected, as is well known, the current of the battery 17 flows intermittently to the primary coil 14 due to the disconnection between the fixed contact 7 and the movable contact 8, and The high voltage generated in the next coil 18 is distributed from the center electrode in contact with the contact piece 22 to each side electrode 28 and energized to the plug 26, and the capacitor 1 prevents the generation of sparks due to the disconnection of the contacts 7 and 8. At the same time, the two metal foils 3 and 5 that form the capacitor 1 form a double seal around the contact, which prevents radio noise in the low frequency range generated by the disconnection of the contact from going outside. radiation is reliably prevented.

Also, since the center electrode is energized via the center coil 23, and the side electrode 28 to the plug 26 is energized via the side coil 29, the inductance of both coils reduces radio noise in the high frequency range within the distributor. The occurrence of is suppressed.

<Other Embodiments> Note that the aspect of this invention is not limited to the above embodiments. For example, the metal foil 3 on the outside of the capacitor 1 and the electric wire 10 connected thereto may be omitted, and a metal foil 3 may be omitted. The cap 2 itself may be used instead of the outer metal foil.

In this case, the capacitor 1 may be constructed by laminating electrolyte-impregnated paper 4, metal foil 5, and insulating paper 6 on the inner surface of the cap 2 in this order.

<Effects of the invention> As described above, according to this invention, the metal foil and insulating paper that form the capacitor are spread out and attached all around the inner surface of the casing, so that the capacitor only prevents sparks from occurring at the contacts. Since the metal foil that forms the capacitor surrounds the contacts, it is possible to reliably block radio noise in the low frequency range generated from the contacts.

Furthermore, since the capacitor is attached in a layered manner to the inner surface of the casing, the space for mounting the capacitor inside the distributor casing can be used effectively.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a vertical sectional view of the distributor cap, and FIG.
FIG. 3, a partially enlarged view of the figure, is an electrical circuit diagram of the distributor. 8...Movable contact, 2...Casing cap, 1...Capacitor, 3, 5...
・Metal foil, 4...Insulator.

Claims (1)

[Scope of utility model registration request] A distributor equipped with a capacitor connected to a movable contact and a casing, characterized in that the capacitor is formed of a metal foil and an insulator added in a layer over the entire inner peripheral surface of the casing. distributor.