CN2351330Y

CN2351330Y - Automatic taxi toplight

Info

Publication number: CN2351330Y
Application number: CN 98240733
Authority: CN
Inventors: 王诚
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-12
Filing date: 1998-09-12
Publication date: 1999-12-01
Anticipated expiration: 2008-09-12

Abstract

The utility model discloses an automatic taxi top light, comprising a taxi top light. The utility model is characterized in that a light controlling relay circuit is arranged in the top. The circuit is composed of a light controlling time-delay switch formed by a 555 time-based integrated circuit (IC) as a core and a relay switch (J), and the light controlling time-delay switch and the relay switch are successively connected. A normally opened relay contact of the relay switch is connected in series with the power supply loop of light bulbs (LM1 and LM2). The automatic taxi top light of the utility model can be automatically lightened at night, and can be automatically turned off in the day.

Description

Automatic taxi toplight

The utility model relates to a kind of signalling apparatus, a kind of automobile signal light, specifically a kind of taxi toplight.

Existing taxi toplight mainly is made up of magnetic base, lampshade, bulb and attaching plug or socket.When night, came dusk, the driver must plug power supply just and can light.If the driver has forgotten the plug-in source, just the same with general-utility car, this not only is not easy to the passenger and reaches and take advantage of, and also is not easy to traffic police commander and management, also loses the effect of decorateeing to urban landscape simultaneously.

In view of there is above-mentioned deficiency in prior art, the utility model discloses a kind of automatic taxi toplight, and this ceiling light is lighted night automatically, and extinguish daytime automatically.

The utility model realizes that the technical solution of above-mentioned purpose comprises a taxi toplight, it is characterized in that establishing in the ceiling light light-operated relay circuit, this circuit is by being that light-operated time-delay switch and the relay switch that core is formed connects and composes successively with 555 time-base integrated circuits, often the opening in the electric power loop that the relay contact is connected on bulb of relay switch.

Because be provided with light-operated relay circuit in the automatic taxi toplight described in the utility model, so can light ceiling light automatically night, extinguish daytime automatically, both reduced driver's trouble, also made things convenient for the passenger, also be convenient to traffic police's command and management at night simultaneously.

Below in conjunction with drawings and Examples the utility model is explained in further detail.

Fig. 1 is the electrical schematic diagram of following embodiment 1;

Fig. 2 and Fig. 3 are the structural representation of a specific embodiment of the present utility model, and wherein Fig. 2 is a front view, and Fig. 3 is a left view.

Example 1:

Referring to Fig. 1, described light-operated time-delay switch is that core is equipped with the peripheral circuit formation with NE555 time base circuit (IC), the trigger end of NE555 time base circuit (2 pin) be provided with down resistance R 1 and on draw photodiode PH, threshold voltage end (6 pin) is with discharge end (7 pin) and after connecing, link to each other with the node of resistance R 2 again with capacitor C 2 series connection time delay circuits, mouth (3 pin) cross-over connection over the ground has relay switch (relay) J, relay J often open relay contact string in the electric power loop of bulb LM1 and LM2.Series connected potential device W regulates NE555 time base circuit 2 pin reference potentials below the resistance R 1, works reliably to guarantee it, if the parameter of resistance R 1 is selected suitablely, also can.Because the dark resistance of photodiode PH is greater than greater than light resistance, thus night time base circuit IC the current potential of 2 pin at the bottom of in 1/3 power line voltage, 3 pin of time base circuit IC output high level, the power supply of bulb LM1 and LM2 is connected in the relay J adhesive, and it is lighted; Daytime, the 2 pin current potentials of time base circuit IC were higher than 1/3 power line voltage, the 3 pin output end level of time base circuit IC, and relay J is thrown off, and cuts off the power supply of bulb LM1 and LM2, and it is extinguished.The effect of 7 pin of time base circuit IC and 6 set time delay circuits is to prevent that car from causing the ceiling light flicker when travelling under street lamp.Because taxicar travels in the environment of dark, at the bottom of the current potential of 2 pin of time base circuit IC in 1/3 power line voltage, the 3 pin output high level of time base circuit IC, time base circuit IC in-to-in discharge bulb ends, the current potential of 7 pin and 6 pin is higher than 2/3 power line voltage, in case taxicar travels to street lamp, the current potential of 2 pin of time base circuit IC then is higher than 2/3 power line voltage, the conducting of time base circuit IC in-to-in discharge bulb, fast stating to the greatest extent with the tele-release in the capacitor C 2, the 6 pin current potentials of time base circuit IC also become the end in 1/3 power line voltage by being higher than 2/3 power line voltage, keep the output high level so 3 pin of time base circuit IC can continue in the charging duration of electric C2, bulb LM1 and LM2 also continue and maintaining lights.

Referring to Fig. 2 and Fig. 3, the support 4 that two bulbs 3 (LM1 and LM2 among Fig. 1) are installed is fixed on the magnetic base 2, control capsule 5 is located between two supporting legs of support 4, the circuit card 6 that circuit shown in Figure 1 is installed is located in the control capsule 5, photodiode 7 (PH among Fig. 1) exposes control capsule 5, over against the set transparent window 8 of lampshade 1 root, lampshade 1 is stuck on the magnetic base 2, with two bulbs, 3 covers within it.Light shines on the photodiode 7 in order to prevent two bulbs to light afterwards, and it is pitch-dark that the bottom of lampshade 1 is coated with last layer.

Referring to Fig. 1, an important additional technical feature of the present utility model is that the power input of described light-operated relay circuit is provided with bridge rectifier protective circuit BD.The effect of this additional technical feature is to prevent from that electric power polarity from connecing inverse time to burn circuit.

The implementation method of the utility model beyond above-mentioned is with reference to accompanying drawing and utilize prior art to implement to get final product.

Claims

1. automatic taxi toplight, comprise a taxi toplight, it is characterized in that establishing light-operated relay circuit in the top, this circuit is by being that light-operated time-delay switch and the relay switch (J) that core is formed connects and composes successively with 555 time-base integrated circuits (IC), and relay switch is often opened in the electric power loop that the relay contact is connected on bulb (LM1, LM2).

2. a kind of automatic taxi toplight according to claim 1 is characterized in that the power input of described light-operated relay circuit is provided with bridge rectifier protective circuit (BD).