JPH05144517A - Connector for electric connection - Google Patents

Abstract

PURPOSE:To achieve the facility of use, to reduce noise of a power source, to improve heat resistance, and to eliminate effect of heating from the power source by providing a power source circuit on the inside of a main body case of a connector to be connected to the end of a cable for electric connection that is drawn out of a sensor or an actuator, to give a necessary power source to a connection circuit, and by making the functions of the sensor or the actuator into a unit form. CONSTITUTION:A connector 1 for electric connection is connected to the end of a cable 26 for electric connection from a sensor 2, while a circuit board 12, a connection cord 13 connected to the circuit board, a connection terminal 14, and a power source circuit 15 put on the circuit board are provided on the inside of a main body case 11 that is made of resin. The connection circuit of the circuit board 12 is printed by a PCB plate and the like, while the power source circuit is formed out of a voltage reduction circuit by means of a DC-DC converter and of a stabilization circuit. A 12V level of a battery power source is reduced to 5V by the voltage reduction circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connection connector provided in an electric wiring path to various sensors and actuators used in automobiles and the like and having a power supply circuit built therein.

[0002]

2. Description of the Related Art As sensors used in automobiles and the like,
There are various types of sensors such as rotation sensors, acceleration sensors, pressure sensors, temperature sensors, etc., and solenoid valves etc. are used as actuators, and the detection signals detected by the sensors are often converted into binary signals and converted into electronic signals. It is a general configuration of a control device that a control signal is sent to a control circuit and a control signal is sent from the control circuit to an actuator.

In such a control device, the detection signal from the sensor and the control signal to the actuator are obtained by applying a predetermined power supply voltage as the operating voltage. As such a power supply method, 5 V or the like in an external circuit is used. There is a method of supplying the voltage after converting it into a constant voltage, and a method of sending the battery voltage as it is to a sensor or an actuator and generating a constant voltage by the sensor or the actuator.

Regardless of which of the above power supply methods is used, the transmission path for the power supply and the detection signal or the control signal is generally constituted by an electric wiring called a wire harness, and the electric wiring is connected by a connector at an appropriate position on the way. .. This connector is generally directly attached to a terminal of a cable derived from a main body such as a sensor or an actuator or a main body such as a sensor, and is used for connection with a main harness of a vehicle. The structure generally comprises a terminal fixed to a core wire of a harness of a sensor or an actuator and a housing for fixing and protecting the terminal. In some cases, a rubber component for sealing the inside of this housing may be additionally mounted.

[0005]

By the way, among the above-mentioned power supply methods, the former method of supplying after converting to a constant voltage, the method of supplying the voltage from the external power supply circuit to the sensor or the actuator There is a problem that noise is easy to ride on the harness. In addition, there is a problem that the sensor or the actuator cannot function as a single unit because it requires an external power source, which makes it difficult to use.

On the other hand, in the latter method of generating a predetermined voltage in the sensor or actuator, since the sensor or actuator has a power source, heat is generated in the power source section and adversely affects the sensor or actuator, or the sensor or actuator is adversely affected. Even if it itself can withstand the temperature of the surrounding environment, the circuit part cannot withstand the temperature conditions, and it may not be usable at high temperatures.

Whichever of the above power supply methods is adopted, conventionally, the connector in the middle of the path is merely placed for the purpose of path connection, and the above-mentioned power supply method is used. It had no role in solving the problem, and no attempt was made to use it in any useful way.

The present invention has been made in view of the present situation of the use of the connector used in the detection circuit and the control circuit which are supplied with power by the power supply circuit described above, and the power supply circuit is provided in the main body case of the connector. To supply the required power supply voltage to the connection circuit of the connector, thereby making the functions of the sensor and actuator stand-alone and easy to use, reducing power supply noise, improving heat resistance, and eliminating the effects of heat generation from the power supply. An object of the present invention is to provide a connector for electrical connection that can achieve the above.

[0009]

In order to solve the above-mentioned problems, the present invention has at least a connection terminal and this connection in a main body case of a connector connected to an end of a cable for electrical connection drawn out from a sensor or an actuator. The connection circuit and the power supply circuit for supplying the power supply voltage or the current to the connection circuit are built into the electrical connection connector.

In the connector having such a structure, it is preferable that the connection circuit is composed of a circuit board and the power supply circuit is mounted on the circuit board.

For any of the above connectors, the power supply circuit may be formed by a DC-DC conversion voltage reduction circuit.

Alternatively, the power supply circuit may be composed of a DC-DC conversion voltage reduction circuit and a stabilization circuit.

[0013]

In the present invention configured as described above, since the power supply circuit is built in the connector body case, the function of the sensor or actuator used by connecting the connector is unitized, and the system design is improved. Easy and easy to use.

Compared to the case where the power source is externally attached, since the power source circuit is provided at a position closer to the sensor or the actuator, the power source noise on the harness during electric power transmission is reduced.

Further, even if the power source is close to the sensors and actuators, they are provided separately from the sensors and actuators. Therefore, the power source section remains installed in a place with good temperature environment, and the influence of heat generation from the power source section remains. Does not need to be applied to sensors and actuators, improving reliability.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic structure of an example in which the connector 1 of the embodiment is connected to the tip of a cable drawn from a wheel speed sensor 2. The connector 1 is a body case 11 of the connector.
A circuit board 12, a connection cord 13 connected to the circuit board, a connection terminal 14, and a power supply circuit 15 mounted on the circuit board are provided inside.

The main body case 11 is entirely formed by resin molding, and the circuit board 12 is, for example, a PCB (printed).
A circuit board or the like is used, and a connection circuit as a connector is printed. The connection cord 13 from the wheel speed sensor 2 is connected to the connection circuit of the circuit board 12.
The end is directly pulled in and fixed. The connector end on the side of the connection terminal 14 is formed into a terminal shape of, for example, a plug-in socket type, which can connect the wire harness end from the battery power source 3 and the electronic control circuit 4.

The wheel speed sensor 2 includes a Hall IC 23 and a magnet 2 inside a case 21 and a mold sealing portion 22 at the upper end.
4, the type having the connection board 25 is shown as an example. An output signal is sent out from the cable 26 connected to the connection board 25, the end of which is connected as the connection cord 13 of the connector 1, and the change of the magnetic field caused by the rotation of the tooth-shaped rotating body X attached to the wheel. Is detected by the Hall IC 23 and converted into an electric signal.

In addition to the above, the wheel speed sensor includes an electromagnetic power generation type and a type utilizing a magnetoresistive element, and it goes without saying that any type may be used.

FIG. 2 shows a schematic block diagram of a method of supplying power to the connector 1 and the wheel speed sensor 2 described above and an entire circuit for sending a detection signal to the electronic control circuit. In the illustrated example, the power supply circuit 15 is a voltage reduction circuit 1 using a DC-DC converter.
6 and a stabilizing circuit 17. When the voltage fluctuation is small, the stabilizing circuit 17 may be omitted. Power is supplied to the power supply circuit 15 from the battery power supply 3, and the voltage reduction circuit 16 converts the battery voltage from 12V to 5V. The 5V voltage is supplied to the rotation sensor 2 via the cable 26, and a signal representing rotation information detected by the rotation sensor 2 is sent to the electronic control circuit 4 via a signal line of a wire harness (not shown).

[0022]

As described above in detail, since the connector of the present invention has a built-in power supply circuit, when this connector is used for a sensor or an actuator, the sensor can be used even if there is no special power supply circuit outside. The actuator or actuator functions as a single unit, which makes the system design easier and easier to use, and allows the power supply to be closer to the sensor or actuator than when using a conventional external power supply. It is possible to reduce the power supply noise that gets on the vehicle.

Further, since the power source is separated from the sensor and the actuator section, the power source section which cannot be used under high temperature can be placed in a place where the temperature environment is good, and the heat resistance can be taken as a countermeasure. It is possible to prevent the influence of heat generation from being given to the sensor and the actuator, and various advantages such as improved reliability can be obtained, which is suitable for application to automobiles and the like.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram of an example in which the connector of the embodiment is used as a rotation sensor.

FIG. 2 is an overall schematic block diagram of an electric circuit using the above connector as a rotation sensor.

[Explanation of symbols]

 1 Connector 2 Wheel Speed Sensor 3 Battery Power Supply 4 Electronic Control Circuit 11 Connector Body 12 Circuit Board 13 Connection Cord 14 Connection Terminal 15 Power Supply Circuit 16 Voltage Reduction Circuit 17 Stabilization Circuit

Claims (4)

[Claims] 1. A main body case of a connector connected to an end of a cable for electrical connection drawn out from a sensor or an actuator, at least a connection terminal, a connection circuit connecting the connection terminal, and a power supply voltage or current to the connection circuit. A connector for electrical connection, comprising a power supply circuit for supply. 2. The connection circuit is composed of a circuit board,
The electrical connection connector according to claim 1, wherein a power supply circuit is mounted on the circuit board. 3. The power supply circuit is formed by a DC-DC conversion voltage reduction circuit.
The electrical connection connector described in. 4. The electrical connection connector according to claim 1, wherein the power supply circuit includes a voltage reduction circuit for DC-DC conversion and a stabilization circuit.