JP2014235807A - Earth connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth connector the cost of which can be reduced by connecting the dummy circuits collectively, thereby reducing the number of components and the assembly man-hours.SOLUTION: An earth connector 1 includes a housing 2 having a socket housing section 2a for housing a socket 10 having a plurality of female terminals 11 connected with the wires on the downstream side of an electric circuit having relays, and housing the components constituting a dummy circuit, male terminals 3 to be connected electrically with the plurality of female terminals 11, respectively, a diode 4 having an upstream end connected electrically with the male terminals 3, and a downstream end connected electrically with the conductive part 5a of an insulated substrate 5, the insulated substrate 5 to which the components constituting a dummy circuit are attached, a resistor 6 having a predetermined resistance value, and a ground member 7 having one end connected with the resistor 6 electrically, and the other end derived from the housing 2 and attached to the car body.

Description

  The present invention relates to a ground connector provided in a vehicle.

  Conventionally, as an electric circuit mounted on a vehicle, as shown in FIG. 4, power is supplied to an ECU (Electronic Control Unit) 102 using a relay 101. For example, when the switch 103 is turned ON, a current flows through the coil of the magnet of the relay 101, and the electric circuit is configured such that the open / close switch 104 of the relay 101 is switched from the open state to the closed state by the magnetic force of the magnet. The configuration is such that 105 electric power flows to the ECU 102 via the relay 101. Here, the ECU 102 has a large resistance inside, and is configured so that a minute current flows.

  In such an electric circuit, when an insulating oxide film is formed at the contact point of the open / close switch 104, the current cannot flow through the relay 101 because a very small amount of current flowing through the ECU 102 cannot break through the oxide film. Cannot be powered. Therefore, in such an electric circuit, by connecting a dummy circuit 106 including a metal resistance having a certain resistance value on the downstream side of the relay 101 in parallel with the ECU 102, the current flowing through the contact of the open / close switch 104 is increased. It is configured to break through the oxide film. In addition, the ground connector which is not for the dummy circuit which puts together a some electric wire and connects to earth | ground is already known (for example, refer patent document 1).

JP 2013-65501 A

  Here, when a plurality of electrical circuits described above are used, a plurality of relays 101 and ECUs 102 are provided, so that a current that can break through the oxide film formed at the contact of each open / close switch 104 is supplied to the relay 101. In addition, it is necessary to provide a plurality of dummy circuits 106, which increases the number of parts and increases the number of assembly steps, resulting in a high cost.

  The present invention has been made in order to solve the above-described problems. By connecting the dummy circuits to one ground and connecting them to the ground, the number of parts and assembly man-hours can be reduced and the cost can be reduced. An object is to provide a connector.

  In order to achieve the above object, the ground connector according to the present invention is (1) a ground connector that grounds the current flowing through each of the plurality of relays to the vehicle body, and the plurality of ground connectors are connected to the wires on the downstream side of each of the relays. A housing having a socket housing portion in which a socket having a female terminal is housed, and a plurality of male members provided in the housing and projecting into the socket housing portion so as to be electrically connected to the plurality of female terminals, respectively. A terminal, a plurality of diodes whose upstream ends are electrically connected to the plurality of male terminals, and all of the downstream ends of the plurality of diodes are electrically connected to increase the current flowing through the contacts that open and close the relay A resistance member having a predetermined resistance value, provided in the housing, one end electrically connected to the resistance member, and the other end from the housing And wherein the derived in part a configuration in which a grounding member fixed to the vehicle body.

  With this configuration, the ground connector according to the present invention can connect the dummy circuits that need to be provided in each of the plurality of electric circuits having the relays to the ground, and reduce the number of parts and the number of assembly steps. Cost can be reduced.

  In the ground connector according to (1), (2) the male terminal, the diode, the resistance member, and the ground member may be provided on an insulating substrate and housed in the housing. Good.

  With this configuration, the ground connector according to the present invention can easily accommodate the parts constituting the dummy circuit in the housing by housing the parts constituting the dummy circuit in the housing after being provided on the insulating substrate. Man-hours can be reduced, and molding of parts constituting the dummy circuit in the housing can be easily realized.

  ADVANTAGE OF THE INVENTION According to this invention, the earth connector which can reduce a number of parts and an assembly man-hour, and can reduce a cost can be provided by putting together a dummy circuit and connecting to earth | ground.

(A) is a schematic plan view of the earth connector which concerns on embodiment of this invention, (b) is a schematic plan view which shows the state which connected the socket to the earth connector. It is a schematic sectional drawing which shows the AA cross section shown to Fig.1 (a). It is a circuit diagram which shows the state which connected the earth connector which concerns on embodiment of this invention to the electric circuit. It is a circuit diagram which shows the electric circuit which has a general relay.

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

  1 and 2 are views showing an embodiment of a ground connector according to the present invention. FIG. 1A is a diagram showing a ground connector 1 and a socket 10 connected to the ground connector 1. FIG. 1B is a diagram showing a state in which the socket 10 is connected to the ground connector 1.

  In FIG. 1A, the ground connector 1 includes a housing 2, a male terminal 3, a diode 4, an insulating substrate 5, a resistor 6 as a resistance member, and a grounding member 7. Here, the dummy circuit includes a male terminal 3, a diode 4, a resistor 6, and a ground member 7.

  The housing 2 is made of a synthetic resin such as polypropylene, accommodates the components constituting the dummy circuit therein, and is connected to the three electric wires on the downstream side of the three electric circuits each having a relay. It has a socket housing portion 2a in which a socket 10 having a female terminal 11 is housed. This is an exemplification, and the present invention is not limited to this.

  The number of male terminals 3 is the same as the number of female terminals 11. Each male terminal 3 is attached to the insulating substrate 5 with screws 8, one end protrudes from the socket accommodating portion 2a and is electrically connected to the female terminal 11, and the diode 4 is soldered to the other end. Attached. In the ground connector 1, one end of the male terminal 3 is electrically connected to the female terminal 11, and the other end is electrically connected to the diode 4, so that a current flows from the female terminal 11 to the diode 4 via the male terminal 3. It is configured as follows.

  The number of diodes 4 is the same as the number of male terminals 3. The diode 4 has an upstream end that is upstream of the current flowing from each electric circuit toward the ground member 7, soldered to each male terminal 3, and a downstream side of the current flowing from each electric circuit toward the ground member 7. The downstream end is soldered to a conductive portion 5a of the insulating substrate 5 described later. The ground connector 1 is configured such that the upstream end of the diode 4 is electrically connected to the male terminal 3 and the downstream end is electrically connected to the conductive portion 5a, so that the male terminal 3 is directed to the conductive portion 5a via the diode 4. While the current flows, the current is prevented from flowing backward from the conductive portion 5 a to the male terminal 3 via the diode 4.

  The insulating substrate 5 includes a conductive portion 5a that is a copper plating pattern, a groove 5b into which a grounding member 7 to be described later is inserted, and a main body 5c that is formed of an insulating material and to which the male terminal 3 and the grounding member 7 are screwed. It is composed of The conductive portion 5a is for flowing a current flowing from each soldered diode 4 to the resistor 6, and is made of a material having excellent conductivity such as copper. By flowing a current through the resistor 6 through the conductive portion 5a, the ground connector 1 can load an electric resistance common to all of the plurality of electric circuits.

  When each component constituting the dummy circuit is attached to the insulating substrate 5, the ground connector 1 places each component constituting the dummy circuit on the insulating substrate 5 and then accommodates the dummy circuit in the housing 2. It is possible to easily accommodate each component constituting the component, reduce the number of assembly steps, and easily mold each component constituting the dummy circuit in the housing 2.

  The resistor 6 is configured such that a current flows from the conductive portion 5 a toward the ground member 7 by being soldered to the conductive portion 5 a on the upstream side and soldered to the ground member 7 on the downstream side. Here, the resistor 6 is a metal resistor made of a metal material such as iron, copper alloy, platinum or the like having a predetermined resistance value, and may be a commercially available electric resistor as long as it has a predetermined resistance value. The resistance value of the resistor 6 is 40 mΩ when the battery voltage is 24 V and a current of 100 mA flows, for example.

  The grounding member 7 has a resistor 6 soldered at one end, the other end led out from the housing 2, and a screw hole 7 a at the other end led out of the housing 2. The ground member 7 is screwed into the screw hole 7a and attached to the screw hole provided in the vehicle body, or is inserted into the screw through hole provided in the vehicle body and fixed with a nut.

  As shown in FIG. 2, the grounding member 7 has a bent base end 7 b inserted into the groove 5 b of the insulating substrate 5 and attached to the insulating substrate 5 with screws 9. By inserting the base end 7b into the groove 5b, the grounding member 7 can be prevented from rotating even if it is fixed by a single screw 9, and can be easily positioned when attached to the insulating substrate 5. Become.

  As shown in FIG. 1B, in the ground connector 1, the three male terminals 3 and the three female terminals 11 are electrically connected to each other when the socket 10 is inserted into the socket accommodating portion 2 a of the housing 2. .

  That is, the earth connector 1 includes three male terminals 3, three diodes 4, a resistor 6, and a grounding member 7 that constitute a dummy circuit that needs to be provided in each of three electric circuits having relays. It becomes the single form accommodated in the housing 2 collectively. As a result, the ground connector 1 is connected to the vehicle body via the grounding member 7, and the number of parts and assembly man-hours can be reduced and the cost can be reduced.

  FIG. 3 shows an electric circuit having a plurality of (three in the figure) electric circuits using the battery 24 as a common power source, and a ground connector 1 in which dummy circuits corresponding to the relays 20 provided in each electric circuit are combined into one. It is a circuit diagram. Each electric circuit includes an ECU 21 and a plurality of relays 20 that supply power to the ECU 21. When a switch 22 of one relay 20 is turned on, the open / close switch 20a of the relay 20 is changed from an open state to a closed state. The power of the battery 24 is configured to flow to the ECU 21 via the relay 20. The ground connector 1 is electrically connected to a socket 10 that accommodates a female terminal 11 provided at an end of a branch wire on the downstream side of the three relays 20. Here, the ECU 21 has a large resistance inside and is configured to allow a minute current to flow.

  By inserting the socket 10 into the socket accommodating portion 2 a of the housing 2 of the ground connector 1, the male terminal 3 of the ground connector 1 and the female terminal 11 of the socket 10 are electrically connected. As a result, each electrical circuit having the relay 20 and the ECU 21 increases the current flowing through the contact point of the open / close switch 20a of each relay 20 more than the current flowing through the ECU 21 by the amount of current flowing through the ground when the switch 22 is turned on. it can.

  Thereby, each electric circuit is formed at the contact by the current increased by the dummy circuit accommodated in the earth connector 1 even when the insulating oxide film is formed at the contact of each open / close switch 20a. It can break through the oxide film.

  As described above, the ground connector 1 according to the present embodiment includes the three male terminals 3, the three diodes 4, and the resistor 6 that constitute a dummy circuit that needs to be provided in each of the three electric circuits having the relay. And the grounding member 7 can be combined into one and screwed into the screw hole 7a provided in the grounding member 7 through the screw 12 to the screw hole provided in the vehicle body, thereby reducing the number of parts and the number of assembling steps. Can be reduced.

  Further, the ground connector 1 according to the present embodiment is provided in the housing 2 after the three male terminals 3, the three diodes 4, the resistor 6, and the grounding member 7 constituting the dummy circuit are provided on the insulating substrate 5. By accommodating, the housing 2 can easily accommodate the three male terminals 3, the three diodes 4, the resistor 6, and the grounding member 7 constituting the dummy circuit, thereby reducing the number of assembly steps. In addition, it is possible to easily mold the parts constituting the dummy circuit in the housing 2.

  In the present embodiment, the plurality of electric circuits use the battery 24 as a common power source. However, the present invention is not limited to this, and a configuration may be adopted in which separate batteries are used as long as they have the same voltage.

  In the present embodiment, the ground connector 1 is electrically connected to three electrical circuits. However, the present invention is not limited to this, and the ground connector 1 may be configured to be connected to two or four or more electrical circuits. Good.

  In this case, the ground connector 1 is configured to have the same number of male terminals 3 and diodes 4 as the number of female terminals 11 included in the socket 10. As a result, the ground connector 1 can connect the dummy circuits to one body and connect them to the vehicle body regardless of the number of electrical circuits having relays, thereby reducing the number of parts and the number of assembling steps and reducing the cost. .

  Further, in the present embodiment, the ground connector 1 is connected to the socket 10 having the three female terminals 11, but is not limited thereto, and is connected to a socket having one or two female terminals 11, for example. May be.

  Further, in the present embodiment, the ground connector 1 electrically connects the components constituting the dummy circuit to the insulating substrate 5. However, the present invention is not limited to this. For example, the male terminal 3 and the ground member 7 are housed in the housing. After attaching to 2, the diode 4, the bus bar corresponding to the conductive portion 5a, and the resistor 6 may be attached. The ground connector 1 may be configured to be electrically connected by soldering the downstream end of the diode 4 to the resistor 6.

DESCRIPTION OF SYMBOLS 1 Ground connector 2 Housing 2a Socket accommodating part 3 Male terminal 4 Diode 5 Insulation board 6 Resistance (resistance member)
7 Grounding member 10 Socket 11 Female terminal 20 Relay

Claims (2)

An earth connector that grounds the current flowing through each of the plurality of relays to the vehicle body,
A housing having a socket housing portion in which a socket having a plurality of female terminals respectively connected to electric wires on the downstream side of the relays is housed;
A plurality of male terminals provided in the housing and projecting into the socket housing portion so as to be electrically connected to the plurality of female terminals, respectively;
A plurality of diodes to which the plurality of male terminals and the upstream ends are electrically connected, and
A resistance member having a predetermined resistance value that is electrically connected to all of the downstream ends of the plurality of diodes and increases a current flowing through a contact that opens and closes the relay;
An earth connector provided in the housing, having one end electrically connected to the resistance member, and the other end led to the outside from the housing and fixed to the vehicle body.   The ground connector according to claim 1, wherein the male terminal, the diode, the resistance member, and the ground member are provided on an insulating substrate and accommodated in the housing.

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