JPH06165436A - Electromagnetic switch device - Google Patents

Abstract

PURPOSE:To facilitate the assembling by forming irregularity, etc., on one side of the opposed sections of a coil case (CC) and a bobbin, and after setting with each other by insertion, stacking other parts with the lead of a bobbin as a guide, and laying a contact case on it, and fastening them with CC. CONSTITUTION:Terminals 12 and 13 are fixed to a contact case 14, and they are fixed to CC10. A battery terminal 12 is connected to a battery power source, and a start electromotive terminal 13 is connected to a rotor 2. A bobbin 19 is U-shaped in cross section, and at one end of it are a lead wire of the start of winding, a lead wire of the end of winding, and lead packings 18 and 19 provided, and further the part 9 is provided with nearly cylindrical projections 191 and 192 to serve as the guide of the contact case 14. At the periphery on the side of projection is formed a projection 193, which engages with the inside periphery of CC10. For the bobbin 19, the projection at the periphery of the bobbin is positioned, by inserting it after deciding its position with CC10. A bobbin 11, a packing 18, and a contact case 14 are stacked in this order on a bobbin 20, with two places of projections, which double as the coil lead wires of the bobbin, as guides, and lastly this is completed by fastening CC10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic switch device for a starter motor, and more particularly, it is provided with concavities and convexities on either side between a coil case and a winding bobbin facing each other, and the positions are determined and inserted. Further hold and combine. Further, the present invention relates to an electromagnetic switch device for a starting motor for an automobile, which is excellent in standardization of parts, improvement of productivity, and price reduction.

[0002]

2. Description of the Related Art A conventional electromagnetic switch device for a starting motor for an automobile is disclosed in Japanese Patent Publication No. 4-23505.
In this conventional technique, the electromagnetic coil wound around a bobbin is inserted into the coil case by deciding the position with respect to the coil case, and then the packing and the contact case are stacked and inserted into the boss, and then the outer circumference of the coil case is caulked. The position of the coil case and the contact case was decided.

[0003]

In the prior art disclosed in Japanese Examined Patent Publication No. 4-23505, if the positions of the coil case and the bobbin move during assembly, the remaining parts cannot be stacked correctly by an automatic machine. . Further, when the coil case is crimped, the position with respect to the contact case is displaced, so that it is necessary to crimp after the position adjustment.

It is an object of the present invention to determine the position of a bobbin in a coil case, insert the bobbin into the coil case, and fit the bobbin to the final step without causing misalignment of the bobbin, resulting in excellent assembly productivity and standardization of parts. A method of manufacturing a switch device is provided.

[0005]

In order to achieve the above object, according to the present invention, a concavo-convex or a serration for coupling is formed on one of the facing portions of the coil case and the bobbin, and the positions of the two are opposed to each other. After the insertion and fitting of the bobbin is fixed, other parts are stacked with the lead wire portion of the bobbin as a guide, and finally the contact case is stacked and the coil case is swaged to provide an electromagnetic switch device.

[0006]

In the present invention having the above-described structure, the coil case and the bobbin are fitted in a state where the positions are accurately determined, and from this state, other parts are sequentially stacked with the lead wire portion of the bobbin as a guide. After stacking the contact cases at the end, the positions of the coil case and the contact case are set to correct positions because the coil cases are caulked. Therefore, the assembly line can be automated and the productivity is improved. Further, although it is possible to cope with diversification by adjusting the initial bobbin insertion position, it is possible to use only one type of parts, which is also very effective for standardization.

Here, since the bobbin is made of synthetic resin, it is possible to easily form a plurality of protrusions on the outer periphery by the conventional technique, and these protrusions have no effect even during winding work. there is no problem.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 when applied to an electromagnetic switch device for a starting motor for an automobile.

Referring to FIG. 1, a starter motor 1 according to the present embodiment.
The pinion 4 and the clutch 5, which are fitted to the shaft of the rotor 2 and the motor portion 2A composed of the rotor 2 and the stator 3 and mesh with the ring gear of the engine (not shown), and the shift lever for moving the pinion 4 and the clutch 5. 6 and an electromagnetic switch device 7 for operating the shift lever 6.

The electromagnetic switch device 7 has a plunger 8 that engages with and operates the shift lever 6, an electromagnetic coil 9 wound around a bobbin 19, a cylindrical coil case 10, and a boss 11 that faces the plunger 8. An opening 11a is formed in the center of the boss 11, and a pressing spring 11b for urging the plunger 8 in the direction away from the boss 11 is arranged between the peripheral end surface of the opening 11a and the plunger 8.

In addition, the electromagnetic switch device 7 includes a battery terminal 12, a starting motor terminal 13, and these terminals 12 and 13.
And a movable contact assembly 15 for electrically connecting the movable contact 15 to the battery terminal 12 and the starting motor terminal 13 by pushing the shaft 16 by the operation of the plunger 8.

The terminals 12 and 13 are fixed to a contact case 14 made of synthetic resin and fixed to the coil case 10 by crimping. The battery terminal 12 is electrically connected to the battery power source via a wiring (not shown), and the starting motor terminal 13
Is electrically connected to the rotor 2 via the wiring 13a. 17 and 18 are packings made of an elastic body.

The bobbin 19 has a substantially U-shaped cross section, and has a winding start lead wire and a winding end lead wire at one end for drawing the packing 18 and the contact case 14.
91 and 192 are provided. Since the convex side is provided with a winding guide, the width is set to about 2 mm.

On the other side, the minimum thickness required to hold the electromagnetic coil 9 is about 1 mm. Further, a plurality of small projections 193 for fitting on the inner circumference of the coil case 10 are formed around the outer circumference of the convex side. In addition, the projection has a small front end and a large rear end for easy insertion.

In the bobbin 19 formed in such a shape, a guide 20 is arranged in the central portion in a sliding portion with the plunger, and then two kinds of electric wires of a current coil and a voltage coil are wound. The bobbin 19 wound in this manner is used for the coil case 7
By determining the positions of and, and inserting them, the convex portions on the outer circumference of the bobbin are joined and the position is determined.

On the bobbin 20, the boss 11 and the packing 1 are provided.
8. The contact case 14 and the contact case 14 are stacked in this order using the two convex portions that also serve as the coil lead-out portions of the bobbin as a guide, and finally the coil case is crimped to complete the process.

Here, with respect to the mounting position of the coil case, the position of the contact case 14 is correctly determined. This is because when the electromagnetic switch is attached to the case of the starter motor, the position of the contact case is important and is related to the wiring arrangement when mounted on the vehicle, so that various specifications are required.

The electromagnetic switch device 7 constructed as described above.
The operation of is as follows. When the electromagnetic coil 9 composed of a current coil and a voltage coil is energized, the plunger is attracted to the boss 11 by electromagnetic force, and the attraction causes the shaft 16 to be pushed out so that the movable contact 15 contacts the fixed contacts 12 and 13. As a result, a current from the battery flows through the electric motor unit 2A, the electric motor unit 2A is rotationally driven, and the engine is started.

A second embodiment of the present invention will be described with reference to FIG. The present embodiment has a structure in which a serration 101 is provided on a main part of the inner circumference of the coil case, and the outer circumference of the bobbin is fixed in position and press-fitted to be assembled. Similar to the above, since the coil case and the bobbin can be reliably coupled, the position is determined, and the same effect as described above can be obtained.

[0020]

According to the present invention, the wound bobbin is press-fitted to the coil case at a predetermined position, and then the other parts are stacked by using the lead wire projecting protrusion of the bobbin as a guide.
Finally, the tip of the coil case is crimped to the contact case to be integrated. Therefore, the battery terminal of the contact case and the position of the electric motor side terminal can be freely combined with each other at the time of assembling with respect to the coil case, resulting in high productivity.

Further, since the position of the contact case can be selected depending on the position where the bobbin is inserted in the coil case, it is effective in standardizing parts, and one kind of part can meet various requirements.

Since the bobbin is made of synthetic resin, it has elasticity and can be firmly inserted into the coil case with a large press-fitting margin.

[Brief description of drawings]

FIG. 1 is an axial partial cross-sectional view of a starter motor including an electromagnetic switch device according to an embodiment of the present invention.

FIG. 2 is a plan view of the bobbin shown in FIG. 1 on the coil lead-out side.

FIG. 3 is a sectional view of a main part of the bobbin shown in FIG.

FIG. 4 is a cross-sectional view of a main part of the coil case shown in FIG.

[Explanation of symbols]

7 ... Electromagnetic switch device, 8 ... Plunger, 10 ... Coil case, 12 ... Battery terminal, 13 ... Starter motor terminal,
15 ... Movable contact, 16 ... Shaft, 19 ... Bobbin, 193 ... Convex portion of bobbin outer periphery.

Claims (2)

[Claims] 1. An electromagnetic coil for electrically connecting a battery terminal and a starting motor terminal, a boss for fixing the electromagnetic coil, and a contact case holding a fixed contact, and a coil for integrally crimping and fixing the same. In an electromagnetic switch having a case, in which a movable contact is brought into contact with a battery terminal and a starting motor terminal by a plunger, a coupling unevenness is provided and inserted in either the winding bobbin of the electromagnetic coil or the opposite coil case. An electromagnetic switch device characterized in that 2. The electromagnetic switch device according to claim 1, wherein the facing portion is a protrusion or a serration.