JPS5853032Y2 - Shield beam valve disconnection detection connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector for connecting a sealed beam, and more particularly to a connector in which a detection device for detecting a breakage of a valve of a sealed beam is incorporated into the connector.

A conventional headlamp bulb warning device uses a relay to detect changes in the current flowing through the headlamp circuit and lights up a warning lamp.

With this method, several amperes of current flows through the relay coil whenever the headlamp is lit normally, so
This method requires a large-capacity relay, which increases the size of the detection unit, and has disadvantages such as short lifespan because it uses relay contacts that open and close mechanically.

This idea was developed with the above points in mind.The light emitted by the headlamp is directly detected by a phototransistor, and an indicator lamp is activated.This detection device is directly connected to the sealed beam connector. The purpose is to provide a connector that can be embedded.

Next, an example will be described.

1 is a connector for connecting a sealed beam, and there are three terminal housing chambers 2 and 3 that are open in the front and back on both the left and right sides and below.
and 4 are provided, and a gutter-shaped wire guide portion 5 is provided at the rear of each of the iron cars 2 to 4.

Each of the terminal housing chambers 2 to 4 is equipped with a female electrical connector that fits into a male terminal protruding from a shield beam (not shown), and the wire fixed to the terminal of the electrical connector is inserted into the wire guide section 5. The configuration is such that wiring is done through the

Reference numeral 6 denotes a groove formed by the left, right, and lower terminal accommodating chambers 2, 3, and 4, and the groove 6 is configured to accommodate a phototransistor holder 15 and a terminal fitting 26, which will be described later.

That is, an engagement step 7 for preventing the holder 15 from being pulled out is provided at the front side wall of the groove 6, a terminal insertion plate 8 for inserting and fixing the terminal fitting 26 at the rear, and a lid 9 that can be opened and closed upwards. establish.

This lid body 9 has one longitudinal side connected to the upper end of one side wall of the groove 6 by a hinge or the like, and a locking arm 10 extending in the longitudinal direction protrudingly provided on the back surface of the other side, and at the center of the back surface. Holder holding part 11. A phototransistor holding pin 12 is provided protruding from the rear.

Further, the locking arm 10 is provided at the upper end of the other side wall of the groove 6.
A locking protrusion 13 is provided to fit with the terminal fitting 26, and slits 14 for the terminal fittings 26 are provided on both sides of the terminal insertion plate 8.

The holder 15 has a prismatic main body 16 made of transparent synthetic resin, and an insertion groove 17 for inserting a gas venting protrusion at the center of the back of the sealed beam in the front end surface thereof, and an insertion groove for the phototransistor 24 in the upper part of the rear end surface. 18. A mounting table 19 is provided at the bottom, and stepped portions 20 are curved on both sides of the rear side.
Further, a locking groove 21 for locking the terminal fitting 26 is continuously provided on the rear surface of the stepped portion 20 .

The locking groove 21 is provided in the transverse direction of the main body 16, and a locking piece 22 is provided protruding from the lower end of the rear groove wall.

Furthermore, a stopper 23 for preventing the phototransistor from being pulled out is provided on the mounting table 19 so as to protrude from the open end of the insertion groove 18.

Note that if the main body 16 is made of opaque resin, the insertion groove 1
The terminal fitting 26, which can be provided with a shaft hole through which the terminals 7.18 are connected, is used to connect the two lead wires 25 of the phototransistor 24 and connect them to an external circuit. A locking plate 28 is provided protrudingly provided, and a notch 29 that fits with the locking piece 22 is provided at its base end.

Note that the terminal fitting 26' is laterally symmetrical to the terminal fitting 26.

Next, how to assemble and use the connector will be explained.

First, the holder 15 is inserted into the groove 6.

The steps 20, 20 of the holder 15 are the engagement steps 7, 7 of the groove 6.
Also, the rear part of the mounting table 19 comes into contact with the terminal insertion plate 8, and cannot be pulled out from the front or back.

Next, a phototransistor 2 is placed on the inner surface of the male terminal portion 27 in advance.
Attach the terminal fitting 26 to which the lead wire 25 of No. 4 is soldered or spot welded.

That is, if the terminal metal fitting 26 is inserted from above the holder 15, the terminal plate 27 will fit between the groove 6 and the holder 15 and between the slit 1.
4, the locking plate 28 is fitted into the locking groove 21, and at the same time the locking piece 22 is fitted into the notch 29.

Therefore, the terminal fitting 26 is installed very easily with the tip of the terminal board 27 protruding outside from the terminal insertion plate 8, and is securely locked without being pulled out in the front or back or tacked in the left or right directions.

Similarly, e)) the transistor 24 is installed in the insertion groove 18;

Finally, when the lid 9 is closed and locked by the locking arm 10 and the locking protrusion 13 of the recessed groove 6, the holder 15 and phototransistor 24 are separated by the holder presser 10 and the presser pin 12, respectively.
This eliminates any wobbling in the vertical direction.

Finally, the connector 1 is attached to the shield beam 30 (see FIG. 3), the gas venting protrusion 31 is inserted into the insertion groove 17 at the front end of the holder 15, and the terminal plate 27, 27 protruding from the rear of the connector 1 is inserted. By connecting to an external display circuit, you can confirm whether the sealed beam bulb is burnt out.

Figures 3 and 4 are block diagrams and diagrams for detecting headlamp bulb burnout using the connector of this invention.
An example of a circuit diagram is shown below.

That is, in FIG. 3, 30 indicates a shielded beam,
The detection unit 32 (i.e., the phototransistor 24 of the connector 1) mounted facing the gas venting protrusion 31 at the center of the back
is connected to the control section 33, and the display section 34 is operated in response to the output signal thereof.

To explain this operation with reference to FIG. 4, 35 is a headlamp (shielded beam), 36 is a phototransistor, 3
7 is a NAND circuit, 38 is a light emitting diode, and when the headlamp 35 is on, the phototransistor 36 is activated by the emitted light.

As for the input to the NAND circuit 37, A is at H level, B is at L level, and the output is at H level, and the light emitting diode 38 does not light up.

On the other hand, if one or both of the headlamp 35 and the phototransistor 36 is abnormal due to disconnection, the input to the NAND circuit 37 becomes H level, the output becomes L level, and the light emitting diode 38 lights up, indicating the abnormality. Inform.

In other words, this method uses a well-known electronic circuit that uses electronic components such as phototransistors to detect when a headlamp bulb burns out, so it has improved reliability and a longer service life than conventional mechanical relay contacts. becomes longer.

Although the above description has been made regarding the case where the sealed beam connector has three poles (three terminal accommodating chambers), the same applies to the case where the connector has two poles.

As explained above, this invention is configured so that a holder internally equipped with a phototransistor for detecting a bulb burnout can be incorporated by utilizing the space, that is, the groove, of the sealed beam connector.

Therefore, it is possible to provide a lightweight and compact valve breakage detection device that also serves as a connector for connecting a sealed beam.

In addition, it can be used as a valve burnout detection device with a long lifespan, avoiding the use of mechanically operated contact relays as in the past.

Further, a terminal fitting for connecting the phototransistor to an external circuit is fitted into and locked in the locking groove of the holder, and the terminal plate thereof protrudes to the outside through slits on both sides of the terminal insertion board at the rear of the groove. The structure is extremely simple to assemble, such as one-touch installation, and it is possible to provide a connector with high practical value.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a connector for detecting disconnection of a sealed beam bulb showing an embodiment of this invention, Fig. 2 is a longitudinal sectional view of its assembled state, and Fig. 3 is a detection circuit used to implement this invention. FIG. 4 is a block diagram showing an example of the circuit diagram. 1... Sealed beam connection connector, 6...
...Concave groove, 8...Terminal insertion plate, 9...
...Lid body, 11...Holder holding part, 12...
... Presser pin, 14 ... Slit l-115.
...Holder, 21...Latching groove, 26...
...Terminal fitting, 27...Terminal board.

Claims (1)

[Scope of utility model registration request] a concave groove formed between the left and right terminal accommodating chambers of the sealed beam connector and having a terminal insertion plate at the rear; a lid body that is connected to the concave groove in an openable and closable manner and has a holder presser on the back surface;
A holder that is inserted into the groove in a manner that cannot be removed from the front and back and has a phototransistor installed at the rear for detecting the disconnection of the bulb of the shielded beam, and a locking plate that is connected to the phototransistor and protrudes from a terminal plate for connecting an external circuit. The locking plates of the terminal fittings are fitted into locking grooves formed on both sides of the holder, and the terminal plates are inserted through slits formed on both sides of the terminal insertion plate. A shielded beam valve breakage detection connector that protrudes externally.