JP3151738B2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp provided with a disconnection detecting circuit for detecting a disconnection of a bulb. The present invention relates to a vehicular lamp in which a circuit and a lamp-side connector for supplying power to a bulb are provided on a back cover.

[0002]

2. Description of the Related Art FIGS. 11 and 12 show a prior art of this kind of lamp. FIG. 11 is a longitudinal sectional view of a conventional lamp, and FIG.
2 is a front view of a back cover in the lamp. Reference numeral 1 denotes a lamp body in which a lens 2 is attached to a front opening, and a bulb 4 (a bulb 4a for a tail and stop lamp, a bulb 4b for a turn signal lamp, a backup lamp) is provided in a rear opening of the lamp body 1. The back cover 3 to which the valve 4c) is attached is mounted. Code 5
(5a, 5b, 5c) are valve sockets fixed to the front surface of the back cover 3, and the valve 4 is mounted on the valve socket 5. At a predetermined position on the front surface of the back cover 3, a disconnection detection circuit unit 6 for detecting disconnection of the tail & stop lamp bulb 4 a is fixed, and a lamp side connector 7 attached to the back surface of the back cover 3. The extending lamp cord 8 is connected to the bulb socket 5 and the disconnection detection circuit unit 6, and power supply to the bulb 4 and the disconnection detection circuit unit 6 is secured. Reference numerals Ra, Rb, and Rc denote reflectors fixed to the back cover 3, and reference numeral 9 denotes a lamp-side connector 7.
This is a power-supply-side connector connected to the power supply.

[0003]

However, in the above-mentioned conventional lamp, the lamp-side connector 7 is controlled by the lamp cord 8.
In addition to connecting the disconnection detection circuit unit 6 to the lamp-side connector 7 and connecting the bulb socket 5a and the disconnection detection circuit unit 6 to each other, connecting the lamp cord 8 is troublesome. In particular, the disconnection detection circuit unit 6 includes an electronic component group 6b on a printed circuit board 6a.
In general, the lamp cord 8 is soldered to the land of the printed circuit board 6a, and there is a problem that the soldering work is very troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a vehicular lamp with a built-in bulb disconnection detection circuit that facilitates wiring connection work.

[0005]

In order to achieve the above object, in a vehicle lamp according to the present invention, a bulb and a lamp-side connector are provided in a rear opening of a lamp body in which a lens is assembled to a front opening. A vehicle cover provided with a disconnection detection circuit for detecting a disconnection state of the bulb, wherein the disconnection detection circuit is integrated with a lamp-side connector, and The power supply terminal terminal and the input / output terminal terminal of the disconnection detection circuit are provided in the lamp side connector, and the lamp side connector in which the disconnection detection circuit is integrated has an input / output of the disconnection detection circuit. Since the terminal terminal and the terminal for power supply to the bulb are provided, the disconnection detection circuit and the lamp Wiring work for connecting at over de becomes unnecessary. According to claim 2, in the vehicle lamp according to claim 1, the disconnection detection circuit has a structure in which an electronic component group for configuring the disconnection detection circuit is mounted on a printed board, and is fixedly integrated with the printed board. The terminal for input / output of the disconnection detection circuit and the terminal for power supply to the valve are formed in a T-shape, and the ends of the T-shaped vertical bar portions of these terminals are printed through the connector wall. It was connected to the conductive path of the substrate. According to a third aspect of the present invention, in the vehicle lighting device according to the first aspect, the disconnection detection circuit is provided on a metal wiring board having an input / output terminal terminal of the disconnection detection circuit and a power supply terminal for the bulb. And a metal wiring board on which the electronic component group is mounted is integrated with the lamp-side connector by insert molding.

[0006]

Next, embodiments of the present invention will be described based on examples. 1 to 3 show a rear combination lamp according to a first embodiment of the present invention. FIG. 1 is a front view of a rear combination lamp in which a tail & stop lamp, a turn signal lamp and a backup lamp are integrated. FIG. 2 is a longitudinal sectional view of the back cover of the lamp (a sectional view taken along line II-II shown in FIG. 1), and FIG. 3 is a perspective view of a lamp-side connector integrated with a printed circuit board constituting a disconnection detecting circuit. It is. In these figures, a rear combination lamp has a rear opening 1 of a lamp body 1 in which a lens 2 is attached to a front opening.
a, a valve socket 5 (5a, 5b,
5c) is fixed to the back cover 10, and the bulb 4 (tail & stop lamp bulb 4a, turn signal lamp bulb 4b, backup lamp bulb 4c) is attached to each bulb socket 5 (5a, 5b, 5c). Is inserted. Symbols Ra and R
b and Rc are parabolic reflectors fixed to the front surface of the back cover 10 and arranged behind the valves 4 (4a, 4b, 4c). The symbol P indicates that the lamp is
Is mounted between the vehicle body B and the lamp body 1 to prevent water from entering the rear side of the lamp facing the trunk room.

A rectangular opening 11 (see FIG. 2) is provided at a position between the bulbs 4b and 4c of the back cover 10, and a disconnection detecting circuit 20 is integrated with the lamp connector 30 in the opening 11. The connector / disconnection detection circuit unit A having a closed cover structure is fixed by a fastening screw 28. And the lamp side connector 30 and each bulb socket 5
(5a, 5b, 5c) are connected by the lamp cord 8, and the vehicle-side connector 40 is connected to the lamp-side connector 30, so that each bulb 4 (4a, 4b, 4c) is connected.
Power supply to c) and operation of the disconnection detection circuit 20 are ensured.

As shown in FIGS. 2 and 3, the disconnection detecting circuit 20 includes a printed circuit board 21 having a predetermined conductive path 22 formed on the back surface thereof, and a conductive circuit 22 mounted on the front surface of the printed circuit board 21 and electrically connected to the conductive path 22. The lamp-side connector 30 is fixedly integrated with the front surface of the printed circuit board 21 by a predetermined fixing means such as a concave / convex lance engagement, screwing, or bonding. Have been.

The lamp-side connector 30 has three types of terminals.
The terminal terminals 31, 32 and 33 are integrated by insert molding. The terminal 31 is formed in a T-shape in which a bent piece 31b extends vertically from the center in the longitudinal direction of a flat contact tab 31a. The terminal 32 is one end of a flat contact tab 32a. The terminal 33 has a flat shape in which a short bent portion 33b is cut and raised at the center in the longitudinal direction of a flat contact tab 33a. Is formed. Each of the contact tabs 31a, 32a, 33a extends toward an open end in the compartment 30a defined by the partition so that a lamp code 8 extending to each bulb 4 can be connected. Reference numeral 35 denotes a terminal lug provided at the end of the lamp code 8, and the terminal lug 35 is pushed in or pulled out to connect the terminal lug 35 to the contact tabs 31a, 32.
Since it can be attached to and detached from the terminal a, 33a, the operation of connecting the lamp code 8 to the terminal terminals 31, 32, 33 is very simple.

On the other hand, the bent pieces 31b, 32b, 33b
Embedded in the partition wall forming the nectar and in the partition wall 30a.
Not exposed, bent pieces 31b and 32b are below connector 30
Surface and penetrate through hole 21b of printed circuit board 21.
Is soldered here. Reference numeral 21c is
3 shows a solder part. Note that in FIG.₁Is tailor
Lamp code for pump power supply, code 8_TwoIs the stop lamp supply
Lamp code for electricity, code 8_ThreeIs the backup lamp power supply
Lamp code, code 8_FourIs a turn signal lamp power supply
Lamp code, code 8_FiveIs a lighting code for the earth,
Lighting code 8₁Is the terminal T₁And lamp code 8_TwoIs the terminal T
_TwoAnd lamp code 8_ThreeIs the terminal T_ThreeAnd lamp code 8_FourIs
Terminal T_FourAnd lamp code 8_FiveIs the terminal T_FiveConnect to each
Is done.

The vehicle body side connector 40 has an outer shape capable of engaging with the rectangular opening 30b at the rear end side of the lamp side connector 30. Terminals 31 are provided inside the connector 30. , 32, 33 contact tabs 31
Terminal terminals 41 engageable with the terminals a, 32a and 33a are accommodated. Therefore, when the vehicle body-side connector 40 is inserted into the lamp-side connector 30, electrical connection between the terminal 41 and the terminal 31, 32, 33 is ensured. Symbols T ₆ and T ₇ are disconnection detection circuits 20
These terminals T ₆ and T ₇ are connected to the connector
It is connected via 40 to an indicator (not shown) provided on the dashboard of the driver's seat. Then, the disconnection detection circuit 20 detects a change in the current value supplied to the stop lamp, and when the stop lamp does not turn on due to the disconnection, the disconnection detection circuit 20 operates to turn on the indicator. Has become.

In the lamp according to the present embodiment, each of the bulb sockets 5 (5a, 5b, 5c) and terminal terminals 31, 32 in the connector 30 of the connector / disconnection detecting circuit unit A fixedly integrated with the back cover 10. ,
Since it is only necessary to connect the lighting device 33 to the lighting device 33 with the lighting device code 8, the wiring connection operation of the lighting device code 8 is simple. FIG. 4 to FIG.
4 shows a rear combination lamp according to a second embodiment of the present invention, FIG. 4 is a longitudinal sectional view of the lamp, FIG. 5 is a perspective view of a connector / disconnection detecting circuit unit, and FIG. 6 is a longitudinal sectional view of the unit. 7 is a perspective view of a metal wiring board, FIG. 8 is a perspective view of a metal wiring board on which electronic components forming a disconnection detection circuit are mounted, and FIG. 9 is a perspective view of a molded connector / disconnection detection circuit unit.

In the connector / disconnection detecting circuit unit A in the first embodiment, the printed circuit board 21 and the lamp-side connector 30 are fixed and integrated by a predetermined method such as mechanical fixing or bonding. T-shaped terminal terminal 31 and L-shaped terminal terminal 32 housed in
Bent pieces 31b and 32b of the printed circuit board 21
2, the disconnection detection circuit and the connector 30
Are electrically connected to each other.
The disconnection detection circuit unit B has four thin strip-shaped metal conductive paths 52 (52 ₁ , 5 2).
2 ₂ , 52 ₃ , 52 ₄ ), the electronic component group 23 is mounted to constitute a disconnection detection circuit 20, and the electronic component mounting conductive path 52 constituting the disconnection detection circuit 20 is integrally formed with the synthetic resin connector 30. There is a characteristic in that.

The metal conductive path 52 is insert-molded and extends into the plate portion 30a of the connector.
2 _3, 52 ₄ of the terminal pin T ₁₁ formed at the tip,
T ₁₂ protrudes forward from the front end portion of the plate portion 30a, the terminal pin T ₁₁ is the feeding terminal to the stop lamp, the terminal pin T ₁₂ constitutes a ground terminal. Further, the rear ends of the conductive paths 52 ₁ , 52 ₂ , and 52 ₄ are bent to extend into the connector case 30b to form terminal terminals 52a that can contact the terminal terminals 41 of the vehicle body-side connector 40. ing.

[0015] Terminal terminal T ₁₃ is connected to the indicator through the connector 40, the terminal pin T ₁₄ is
Acts as a feeding terminal to the stop lamp, the terminal pin T ₁₅ acts as a ground terminal. The upper position of the contact terminals T _13, T _14, T ₁₅ of the connector case 30b is a terminal pin T ₁₆ for power supply to the turn signal lamp, to the terminal pin T ₁₇ and the tail lamp for power supply to the backup lamp terminal terminal T ₁₈ of the power supply is provided.

A conductive path 5 for supplying power to the stop lamp
Together with the coil C is provided between the 2 _2, 52 _3, between the conductive paths 52 ₁ and the conductive path 52 ₄ for grounding connected to the indicator, the disconnection detection switch Sw so as to pass through the inside coil C The disconnection detection circuit 20 is provided. That is, stop lamp filaments are not broken, when the current flows through the coil C is between conductive paths 52 ₁ and the conductive path 52 ₄ by the action of switch Sw is opened to become a non-conductive state, indicator non It is turned on. On the other hand, when the filament of the stop lamp is broken, no current flows through the coil C and the switch S
During conductive path 52 ₁ and the conductive path 52 ₄ by the action of w is closed conducting, has a mechanism for notifying the disconnection of the stop lamp indicator lights.

In order to manufacture the connector / disconnection detecting circuit B, first, a flat metal plate is punched out, and a wiring board 50 having a band-shaped conductive path 52 having a predetermined shape as shown in FIG.
To form The belt-shaped conductive paths 52 are continuous with each other via a narrow separation portion 53 which is cut and removed later. Reference numeral 54 denotes a hole for inserting the leg of the electronic component group 23 formed in each conductive path 52. Next, the legs of the electronic component are inserted into the holes 54, and the back surface is subjected to a solder flow process, whereby the electronic component group 23 is fixedly integrated with the conductive path 52 (see FIG. 8). Next, the lamp-side connector 30 is molded in a state where the wiring board 50 in which the electronic component group 23 is integrated together with the terminal terminal 33 is inserted into a mold, and the terminal terminal 33, the wiring board 50 and the connector 30 are integrated. Become Next, the punching press 55
(See FIG. 6), by cutting and removing the portion 53 to be separated and separating the conductive paths 52, the connector / disconnection detection circuit unit B shown in FIG. 9 is completed.

In the first to third embodiments, the terminal terminal 33 accommodated in the lamp-side connector is provided.
Is not connected to the printed circuit board constituting the disconnection detection circuit, but merely relays the vehicle body side connector 40 and the lamp cord 8. Therefore, as shown in FIG. 10, a terminal engageable with the terminal terminal 41 in the vehicle body side connector 40 is provided at the end of the lamp cord 8, and the terminal is connected to the connector 30 without using the terminal terminal 33. The lamp cord 8 may be directly connected to the vehicle body side connector 40.

[0019]

As is clear from the above description, according to the vehicular lamp according to the present invention, it is not necessary to connect the disconnection detecting circuit and the lamp side connector with the lamp cord, and therefore, the wiring in the lamp is not required. Connection work is simplified.

[Brief description of the drawings]

FIG. 1 is a front view of a rear combination lamp in which a tail & stop lamp, a turn signal lamp, and a backup lamp are integrated according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the back cover of the lamp (a sectional view taken along line II-II shown in FIG. 1).

FIG. 3 is a perspective view of a lamp-side connector integrated with a printed circuit board constituting a disconnection detection circuit.

FIG. 4 is a longitudinal sectional view of a rear combination lamp according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a connector / disconnection detection circuit unit.

FIG. 6 is a longitudinal sectional view of the unit.

FIG. 7 is a perspective view of a metal wiring board.

FIG. 8 is a perspective view of a metal wiring board on which an electronic component group constituting a disconnection detection circuit is mounted.

FIG. 9 is a perspective view of a molded connector / disconnection detection circuit unit.

FIG. 10 is a perspective view of a leading end of a lamp-side cord, which is a main part of another embodiment.

FIG. 11 is a longitudinal sectional view of a conventional vehicle lamp.

FIG. 12 is a front view of a back cover of the lamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lamp body 2 Front lens 4 (4a) Tail & stop lamp bulb 5 (5a) Tail & stop lamp bulb socket 8 Light cord 10 Back cover 20 Disconnection detection circuit 21 Printed circuit board 22 Conductive path formed on printed circuit board 23 Electronic component group constituting disconnection detection circuit 30 Lamp side connector 31 T-shaped terminal terminal 32 L-shaped terminal terminal 40 Body side connector 50 Metal wiring board 52 Conductive path A, B Connector / disconnection detection circuit unit T To ₂ stop lamp input-output terminal pins of the feed members terminal T _6, T ₇ disconnection detection circuit

Claims (3)

(57) [Claims] 1. A back cover provided with a bulb and a lamp-side connector is attached to a back opening of a lamp body having a lens attached to a front opening.
In a vehicle lamp provided with a disconnection detection circuit for detecting a disconnection state of the bulb, the disconnection detection circuit is integrated with a lamp-side connector, and a power supply terminal terminal for the bulb and an input / output of the disconnection detection circuit are provided. A vehicle lighting device characterized in that a terminal terminal for the lighting device is provided in the connector on the lighting device side. 2. The disconnection detecting circuit has a structure in which a group of electronic components for forming a disconnection detecting circuit is mounted on a printed circuit board, and includes an input of a disconnection detecting circuit provided in a lamp-side connector fixedly integrated with the printed circuit board. The output terminal terminal and the power supply terminal terminal to the valve are formed in a T-shape or an L-shape, and the tips of the T-shape or the L-shape vertical bar portions of these terminals are printed through the connector wall. 2. The semiconductor device according to claim 1, wherein the conductive path is connected to a conductive path of the substrate.
The vehicle lighting device as described in the above. 3. The disconnection detection circuit includes a metal wiring board on which an input / output terminal terminal of the disconnection detection circuit and a power supply terminal terminal to the valve are formed, and a group of electronic components for the disconnection detection circuit configuration. The vehicle lamp according to claim 1, wherein the metal wiring board on which the electronic component group is mounted is integrated with the lamp-side connector by insert molding.