JP3768468B2 - Starter control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for controlling an engagement switch of a starter for starting an internal combustion engine, and more particularly to a configuration of a starter relay having a control circuit board.
[0002]
[Prior art]
The starter for starting the internal combustion engine is provided with an engagement switch having a main switch and a pinion transfer mechanism, and a starter relay for performing ON / OFF control of a power source for the engagement switch. As for the supply of power to the starter relay, there are both a body ground type and a ground float type grounding system depending on the circuit configuration of the system.
[0003]
In recent years, various safety and control for protecting parts have been introduced into vehicles, but a control circuit board for protection is also provided in a starter circuit using a starter. This control circuit board is a starter relay. Is usually provided (see, for example, Patent Document 1). As described above, a starter relay (including a control circuit and hence referred to as a starter control device) provided with a control circuit board needs to be properly used as a body ground type and an earth float type depending on the circuit configuration of the system.
[0004]
Patent Document 1 describes that a control circuit board (protection circuit in Patent Document 1) is built in a cap having a terminal of a starter control device (auxiliary switch in Patent Document 1). Such a configuration is effective.
[0005]
[Patent Document 1]
JP 2000-87831 A (page 3, FIG. 6)
[0006]
[Problems to be solved by the invention]
When the control circuit board is installed inside the starter control device, it is tightened together with screws that attach the cap to the case in order to reduce the size and simplify the configuration. The grounding connection is made at the same time as fixing the screw on the control circuit board by providing a pattern for the control circuit board. With the earth float type control circuit board, the grounding land is not provided at the screw tightening part, so both can be used properly. Made. However, although both have the same circuit contents except for the presence or absence of a grounding land, two types of control circuit boards are required for setting the body grounding type and the earth float type, and the number of parts is reduced. In addition to the increase, there is a problem of being misassembled because it is difficult to distinguish between the two.
[0007]
The present invention has been made to solve such a problem, and in a starter control device provided with a control circuit board, by sharing the control circuit boards for body grounding and for earth float, the number of parts is reduced. It is an object of the present invention to obtain a starter control device that can reduce the number of occurrences and prevent erroneous assembly.
[0008]
[Means for Solving the Problems]
A starter control device according to the present invention includes a conductive case that houses an exciting coil, a cap that is made of an insulating material and is attached so as to close an open end of the case, a control circuit, and a cap that is interposed via the cap. And a control circuit board that is attached to the case and fixed by a conductive mounting screw. The control circuit board is formed with a ground pattern around the mounting hole on one side, and the grounding method of the device by changing the mounting direction Can be used properly for both body earth and earth float types.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIGS. 1 to 3 illustrate the configuration of a starter control device according to Embodiment 1 of the present invention. FIG. 1 shows the essential configuration of a control circuit board used in the starter control device. a) shows one surface, and FIG. 1 (b) shows the other surface. 2 shows a configuration when the control circuit board of FIG. 1 is used in a body earth type starter control device. FIG. 2 (a) is a front view, FIG. 2 (b) is a sectional view, and FIG. (C) is a cross-sectional view of the cut 90 ° different from FIG. 2 (b), and FIG. 3 shows a configuration when the control circuit board of FIG. 1 is used for an earth float type starter relay. 3 (a) is a front view, FIG. 3 (b) is a cross-sectional view, and FIG. 3 (c) is a cross-sectional view of a cut surface that is 90 ° different from FIG. 3 (b).
[0010]
As shown in FIG. 1A, a power supply terminal pattern (B terminal pattern) 2 is formed on one surface of the control circuit board 1 and a C terminal pattern connected to the power supply terminal pattern 2 at a symmetrical position. 3, an L terminal pattern 4 connected to an exciting coil of a starter control device to be described later, and an earth pattern (E terminal pattern) 5 provided at a portion where the seating surface of the mounting screw abuts when assembled. Although not shown, components constituting the circuit are mounted on the control circuit board 1. Hereinafter, the surface of this side of the circuit board 1 is referred to as a-plane, and the opposite surface is referred to as b-plane.
[0011]
The same B terminal pattern 2a is provided on the back surface of the power supply terminal pattern 2 on the a surface, and the same C is applied on the back surface of the C terminal pattern 3 on the a surface. The terminal pattern 3a is formed, the same L terminal pattern 4a is formed on the back side of the L terminal pattern 4 on the surface a, and the e terminal pattern 6 as a ground connection pattern on the control circuit board 1 is formed. The outer shape and the positions of the B terminal pattern 2 and the C terminal pattern 3 are formed symmetrically with respect to the vertical center line ψ.
[0012]
In the body earth type starter control device equipped with the control circuit board 1 shown in FIG. 2, one winding end 7a of the exciting coil 7 is led out through the eyelet 8 and the terminal 9, for example, a key switch of a vehicle. Connected to. The other winding end 7 b of the exciting coil 7 is connected to the L terminal pattern 4 of the control circuit board 1 via the eyelet 10 and the connection connector 11 so that the control circuit board 1 closes the opening end of the case 12. When the cap 13 is assembled to the case 12, it is fixed to the case 12 together with the cap 13 by the mounting screw 14, and the E terminal pattern 5 is attached to the case via the mounting screw 14, so that the above-mentioned “a” surface comes to the head side of the mounting screw 14. 12 is electrically connected to form a body ground.
[0013]
In the earth float type starter control device equipped with the control circuit board 1 of FIG. 3, the circuit board 1 is assembled with the cap 13 so as to close the open end of the case 12 as in the case of the body earth type. When the fixing screw 14 is fixed to the case 12 together with the cap 13, the screw seat for the mounting screw 14, as shown in FIG. It is provided at a symmetrical position. Therefore, the control circuit board 1 cannot be attached unless it is turned over.
[0014]
Also in the earth float type starter control device, one winding end 7a of the exciting coil 7 is led to the outside through the eyelet 8 and the terminal 9, and is connected to, for example, a key switch of the vehicle and excited. The other winding end 7 b of the coil 7 is connected to the L terminal pattern 4 a of the control circuit board 1 through the eyelet 10 and the connection connector 11.
[0015]
When the cap 13 is assembled to the case 12, the control circuit board 1 is fixed to the case 12 together with the cap 13 by the mounting screw 14. However, as described above, the control circuit board 1 cannot be attached unless it is turned over. The E terminal pattern 5 is in contact with the cap 13 made of an insulating material and is not body-grounded to the case 12. Instead, the e terminal pattern 6 is connected to the connector 15 as shown in FIG. Through the ground lead bolt 16 and lead out.
[0016]
With this configuration, one type of control circuit board 1 can be used for both a body earth type starter relay and an earth float type starter relay, the number of parts can be reduced, and the control circuit board can be reduced. Since 1 cannot be assembled to a different ground type starter control device unless it is turned upside down, no erroneous assembly is caused. Note that the cap 13 is inherently impossible to divert both, so the number of parts is not increased by this configuration.
[0017]
【The invention's effect】
In the starter control device configured as described above, according to the first aspect of the present invention, an insulating cap that is attached so as to close the open end of the conductive case, a control circuit, and a cap are provided. The control circuit board is attached to the case and fixed with a conductive mounting screw. The control circuit board has a grounding pattern around the mounting hole on one side, and the device grounding method is changed by changing the mounting direction. Can be used for both types of body earth and earth float, so one type of control circuit board can be used for both body earth and earth float type starter control devices. Thus, standardization becomes possible and erroneous assembly can be prevented.
[Brief description of the drawings]
FIG. 1 is a main configuration diagram of a control circuit board used in a starter control device according to Embodiment 1 of the present invention;
FIG. 2 is a configuration diagram of a body earth type of a starter control device according to Embodiment 1 of the present invention.
FIG. 3 is a configuration diagram of an earth float type of a starter control device according to Embodiment 1 of the present invention;
[Explanation of symbols]
1 control circuit board, 2, 2a B terminal pattern,
3, 3a C terminal pattern, 4, 4a L terminal pattern,
5 E terminal pattern (ground pattern),
6 e Terminal pattern (Pattern for ground connection)
7 Excitation coil, 7a, 7b Winding end,
8, 10 eyelets, 9 terminals,
11 Connector for connection, 12 case, 13 cap,
14 mounting screws, 15 connectors, 16 ground lead bolts.

Claims (5)

A conductive case that houses the exciting coil, made of an insulating material, a cap that is attached so as to close the open end of the case, a control circuit is mounted, and is attached to the case together with the cap via the cap. The control circuit board is fixed by a mounting screw, and a ground pattern is formed around the mounting hole on one side of the control circuit board. The starter control device is configured to be used properly for both types. 2. The starter control device according to claim 1, wherein when the grounding method is body grounding, the mounting direction is set so that the ground pattern provided around the mounting hole is on the head side of the mounting screw. 2. The starter control device according to claim 1, wherein when the grounding method is ground float, the mounting direction is set so that the ground pattern provided around the mounting hole is on the cap side. On the other side of the control circuit board, a ground connection pattern is provided in a portion other than the peripheral portion of the mounting hole. When the ground system is an earth float, the ground terminal is led out through the ground connection pattern. 4. The starter control device according to claim 3, wherein the starter control device is configured as described above. The control circuit board mounting screw holes and mounting holes provided in the case and the cap are provided at different positions depending on whether the grounding method is body grounding or earth floating, and the respective positions are the control The starter control device according to any one of claims 1 to 4, wherein the starter control device is symmetrical with respect to the center line of the circuit board mounting position.

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