JPH0455261Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a distributor used in internal combustion engines of automobiles, and is particularly applicable to distributors in which an ignition coil is housed in the same housing. , relates to a connection structure between the secondary output side electrode and a connection conductor provided on the cap.

[Prior Art] Fig. 5 shows an example of a conventional distributor, in which a rotor shaft b is rotatably supported inside a housing a, and a power distribution rotor C is attached to the end of the shaft. ing. The symbol d is an electrode plate. Further, an ignition coil e is integrally housed within the housing a. The symbol f is a secondary output side electrode. On the other hand, the opening of the housing a is covered by a cap g, and a connecting conductor h is integrated inside the cap g. The connection conductor h is a member that electrically connects the electrode plate d and the secondary output side electrode f via the carbon brush i and the rod-shaped electrode j, and is usually die-cast aluminum and has carbon brushes i and the carbon brushes i and 2 at both ends. A cylindrical portion for accommodating the rod-shaped electrodes j in a manner that they can be moved in and out is formed by machining.

[Problems to be solved by the invention] By the way, in the case of the above-mentioned structure of the connecting conductor h, it is difficult to move the rod-shaped electrode j in and out from its end toward the secondary output electrode f having a relatively narrow area. Therefore, it is necessary to center the axial direction of the rod-shaped electrode j toward the secondary output side electrode f. For this reason, highly accurate machining is required for the cylindrical portion of the connecting conductor h, making the work that much more difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a distributor having a connecting conductor in which rod-shaped electrodes can be easily centered and easily manufactured.

[Means for Solving the Problems] The distributor of the present invention accommodates a power distribution rotor and an ignition coil in a housing, and connects a power distribution rotor and an ignition coil through a connecting conductor provided in a cap covering an opening of the housing. , a secondary output side electrode of the ignition coil and an electrode plate of the power distribution rotor are electrically connected, and a cylindrical portion is provided near the secondary output side electrode of the ignition coil. is set upright, and a rod-shaped electrode is housed in the cylindrical portion via a spring so as to be freely removable and removable, and the end of the connection conductor on the side to which the tip of the rod-shaped electrode is pressed is flattened and the secondary output side electrode It is characterized by being formed to be larger than the area of.

[Operation of the invention] The ignition coil of the distributor according to the invention has a cylindrical part erected near the secondary output side electrode, and a rod-shaped electrode is housed in the cylindrical part via a spring so as to be freely removable and removable. has been done. The tip of this rod-shaped electrode is pressed against the end of the connection conductor, and is formed to be flat and larger than the area of the secondary output side electrode. Therefore, the rod-shaped electrode is spring-biased from the secondary output side electrode, which has a small area, toward the end of the connecting conductor, which has a larger area, making centering easier, and the tip can be securely attached to the end of the connecting conductor. Connect to.

[Embodiment] An embodiment of the present invention is shown in FIGS. 1 to 4.
FIG. 1 is an overall view of the distributor with a part cut away, and the reference numeral 1 in the figure indicates a housing;
2 is a cap, 3 is an ignition coil, 4 is a secondary output side electrode, 5 is a joint tube, 6 is a rotor shaft, 7 is a power distribution rotor, 8 is an electrode plate, and 9 is a measuring section electrode. In addition, there is a connecting conductor 1 inside the cap 2.
0 is embedded all together.

The connecting conductor 10 is made of a pipe member, and its center electrode side end 11 has a cylindrical shape, and a carbon brush 12 is housed inside, and is biased by a spring 13 in the direction of pressure contact with the electrode plate 8. .

The ignition coil side end portion 14 has a flat shape split into two, forming a wide portion having a larger area than the secondary output side electrode. It is pressed by a spring 16 from the next output side electrode 4 side.

An intermediate portion 18 between the center electrode side end portion 11 and the ignition coil side end portion 14 is a narrow diameter portion and is twisted. By adding such twisting, the strength of this part is improved and the strength is comparable to that of conventional die-cast products.

Therefore, the connection conductor 10 can fully function as a connection conductor with a built-in cap, and transfers the secondary high voltage of the ignition coil 3 from the secondary output side electrode 4 to the spring 16, the rod-shaped electrode 15, the pipe member 19,
Intermediate portion 18, center electrode side end portion 11, spring 1
3. It can be transmitted to the electrode plate 8 via the carbon brush 12.

Next, a method for manufacturing the connection conductor 10 will be explained based on FIGS. 2 to 4.

The connecting conductor 10 is manufactured using a pipe member 19 as shown in FIG. That is, both ends of the pipe member 19 are pulled in the direction of the arrow in FIG. Then, as shown in FIG. 3, both ends remain in the original pipe shape and become the center electrode side end 11 and the other end 20, and the middle part becomes a small diameter pipe part 21. Since it is difficult to obtain the required strength if this small diameter pipe portion 21 remains as it is, it is further twisted around the longitudinal axis. Then, the small diameter pipe section 21 is twisted into the twisted intermediate section 18 as shown in FIG.
becomes. This twisting increases the strength of the intermediate portion 18 and satisfies the required level.

Note that the center electrode side end portion 11 can be used as it is as a cylindrical portion for accommodating the carbon brush 12 and the spring 13, eliminating the need for high-precision machining as in the prior art.

Further, the other end portion 20 can be used as it is as a cylindrical portion for accommodating the rod-shaped electrode 15 in the same manner as the center electrode side end portion 11, but in this embodiment, this portion is further divided into two parts, opened left and right, and then flattened. It is crushed into a shape to form a wide ignition coil side end portion 14. Therefore, the rod-shaped electrode 15 is connected to the spring 13.
When the secondary output electrode 4 is brought into pressure contact with the ignition coil side end 14 from the direction of the secondary output electrode 4 via the Therefore, the rod-shaped electrode 15
centering becomes easier. Therefore, the rod-shaped electrode 1
The contact area with the ignition coil side end portion 14 of the rod-shaped electrode 15 is increased, and good contact with the ignition coil side end portion 14 of the rod-shaped electrode 15 can be ensured at all times.

Although this embodiment shows an example in which a large-diameter pipe is used, conversely, it can also be formed by enlarging the end of a small-diameter pipe.

[Effect of the invention] The distributor according to the invention spring-biases the rod-shaped electrode from the secondary output side electrode of the ignition coil toward the end of the connection conductor provided in the cap, so that the centering of the rod-shaped electrode is improved. This makes it easier for the tip to come into contact with the end of the connecting conductor. Moreover, the ends of the connecting conductors can be formed without requiring high-precision machining as in the prior art, making manufacturing easier.

[Brief explanation of the drawing]

1 to 4 show one embodiment, and FIG. 5 shows a conventional example. Figures 1 and 5 are side views showing the entire distributor with a part cut away;
4 through 4 are perspective views showing the forming process of the main parts. Explanation of symbols, 1...Housing, 2...Cap, 3...Ignition coil, 4...Secondary output side electrode, 5...Joint cylinder section, 6...Rotor shaft, 7...Distribution rotor, 8... Electrode plate, 9... Side electrode, 10... Connection conductor, 11... Center electrode side end, 12... Carbon brush, 14... Ignition coil side end.

Claims (1)

[Scope of utility model registration request] A power distribution rotor and an ignition coil are housed in a housing, and a secondary output side electrode of the ignition coil and an electrode of the power distribution rotor are connected to each other through a connecting conductor provided in a cap covering an opening of the housing. In the distributor electrically connected to the plate, a cylindrical portion is erected near the secondary output side electrode of the ignition coil,
A rod-shaped electrode is housed in and out of the cylindrical portion via a spring, and the end of the connecting conductor on the side to which the tip of the rod-shaped electrode is pressed is flat and larger in area than the secondary output side electrode. A distributor characterized in that it is formed so as to be.