JPS6257830B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a distributor, and more specifically, a pick-up coil and a case housing a hybrid IC control circuit electrically connected to the pick-up coil are fixed in a housing. Regarding the distributed distributor that is installed.

As shown in Japanese Unexamined Patent Publication No. 51-136113, a pick-up coil and a case containing a hybrid IC-based control circuit electrically connected to the pick-up coil are fixed and arranged in a housing. is well known.

However, in the conventional technology described above, the pick-up coil was installed in a narrow space between the distributor shaft and the inner wall of the distributor, so the pick-up coil could not be made very large, resulting in a problem that its output was small. It was hot.

The object of the present invention is to eliminate the above-mentioned problems and to provide a fixing structure for both the case containing the hybrid IC circuit and the pick-up coil, which can increase the output of the pick-up coil without impairing the main purpose of compactly mounting the pick-up coil in the housing. The purpose is to provide the configuration of a distributor.

The feature of the present invention is that the case is formed into a substantially fan-shape and is installed on one side inside the distributor, and the pick-up coil is fixed at a key position of the fan-shaped case and inserted into the shaft of the distributor. It is in.

In the distributor constructed in this manner, the pickup coil and the case can be constructed in an efficient shape that matches the shape of the housing, and the diameter of the pickup coil can be increased, so that its output can be increased.

Embodiments of the present invention will be described in detail below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 indicates the housing of the distributor, and reference numeral 2 indicates the cap thereof. A shaft 3 driven by a camshaft of an engine is rotatably held within the housing 1 . A sleeve 3A is fitted into the shaft 3, and a rotor 60 and a ring-shaped reluctor 4 are fixed to the outer periphery of the sleeve 3A. In the case of a four-cylinder engine, this reluctor 4 has four magnetic poles 4A, 4B, 4C,
4D is provided to protrude. A disk-shaped fixed base 5 through which the shaft 3 is inserted is fixed to the housing 1 by screws or the like.
Further, on one side of the fixed base 5 centered on the shaft 3, a support stand 6 for a hybrid IC storage case is fixed with screws 7. A resin case 9 containing a hybrid IC circuit board is fixed onto the support base 6 with screws 10 and 11. The resin case 9 is made up of a case base 14 having screw holes 19 and 20 as shown in FIG. 3, and a ring-shaped tip 12 having a shaft insertion hole 21. A pick-up coil 13 is built into the ring-shaped portion 12, and a hybrid IC 8 constituting a control circuit is built into the case base 14 on a ceramic substrate. Further, within the resin case 9, the hybrid IC 8 and the pickup coil 13 are connected through a signal terminal 15.
The signal from the pickup coil 13 can be amplified by the control circuit. Reference numerals 50 and 51 indicate input and output terminals of the control circuit that protrude upward from the resin case 9, and are connected to lead wires 34 that connect each terminal to the outside. This lead wire 34 is drawn out to the outside of the housing 1. The input terminal 50 consists of a terminal connected to the positive terminal of the power source and a switching terminal, and the output terminal 51 is an ignition terminal.

Reference numeral 22 denotes a movable base. The movable base 22 has a disk shape, has a hole in the center for inserting the shaft 3, and has a cylindrical portion 22A extending in one direction around the hole. And movable base 2
2, the cylindrical portion 22A is fitted into the shaft insertion hole of the fixed base 5, and the ball 23 and the cylindrical portion 22A are provided between the movable base itself and the fixed base 5.
It is held rotatably about the shaft 3 on the fixed base 5 by being sandwiched from above and below by balls 24 supported by the shaft 3. Also, the movable base 22
A notch is formed in a part of the support base 6 so that the support base 6 does not interfere with the support base 6. Furthermore, movable base 22
is connected to a lever 26 extending from the vacuum advancer 25 via a screw 27, and is configured to rotate in accordance with the operation of the vacuum advancer 25. Further, a ring-shaped permanent magnet 28 is fixed to the inner peripheral surface of the cylindrical portion 22A of the movable base 22 with a constant gap with respect to the shaft 3. A stator 29 is fixed to the movable base 22 by screws 30 and 31 on the side opposite to the case 9, and two magnetic poles 32 and 33 extending parallel to the axial direction of the shaft 3 are provided at both ends of the stator 29. is formed. This biaxial pole 32,
33 is a constant gap G with the reluctor 4 in between.
1, formed on a 180 degree diagonal line with G2.
Reference numerals 35 and 36 indicate centrifugal advance mechanisms attached to the sleeve 3A.

The flow indicated by φ in the figure indicates the flow of magnetic flux generated by the permanent magnet 28, and the magnetic flux circulates through the movable base 22, the stator 29, the reluctor 4, and the shaft 3. Therefore, the magnetic pole 3 of the stator 29
2 and 33 are opposed to the reluctor 4 at 180 degrees via the gaps G1 and G2, so this gap G
The magnetic resistance of 1, G2 is determined by the approximately average length of these gaps. As a result, reluctor 4
Or due to the eccentricity of the shaft 3, the gear G
Even if 1 and G2 change, the average value remains constant, and a stable signal output can be obtained with almost no signal change.

The change in magnetic flux caused by the rotation of the shaft 3 is detected by the pickup coil 13, amplified by the control circuit of the hybrid IC 8, and led out through the lead wire 34 to be used as a signal for controlling the ignition coil.

In the distributor according to this embodiment, the ceramic substrate of the hybrid IC 8 is overlapped with the lower part of the pick-up coil 13, and the pick-up coil 13 and the resin case 9 are integrally combined, so that the area occupied by the resin case 9 is In other words, the resin case 9 is made smaller.

To explain in detail, the resin case 9 houses the hybrid IC 8 inside the case base 14 and has a pickup coil 13 buried inside the ring-shaped part 12. The pick-up coil 13 and the hybrid IC 8 are arranged in an overlapping manner in the axial direction of the shaft 3.

Therefore, the area occupied by the resin case 9 is reduced, that is, the resin case 9 is made smaller. Thereby, the resin case 9 can be disposed without changing the size of the housing 1.

As explained above, in the distributor of the present invention, the pick-up coil and the case can be installed in the housing in an efficient shape that matches the shape of the housing, and a pick-up with a large output can be used. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a distributor according to the present invention, FIG. 2 is a plan view with the cap shown in FIG. 1 removed, and FIG. 3 is a perspective view partially showing a cross section of the resin case according to the present invention. . 1...Housing, 3...Shaft, 8...Hybrid IC, 9...Resin case for storing hybrid IC circuit board, 13...Pick-up coil.

Claims (1)

[Claims] 1. In a distributor in which a pick-up coil and a case housing a hybrid IC control circuit electrically connected to the pick-up coil are fixedly arranged in a housing, the case is formed into a substantially fan shape. The pickup coil is fixed to a key position of the fan-shaped case and is inserted into the shaft of the distributor.