JP3107038U - Vehicle indicator lamp and light emitting diode lighting circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular indicator lamp that uses a light source that is free from electromagnetic interference and has a long life and substantially does not require maintenance, and that does not vary in luminance of the light source even when the voltage of the battery varies. .
An LED, a constant voltage element, a current limiting resistor, and a connection terminal are closely fixed to the component mounting base, and are wired by a connection wire so as to constitute a lighting circuit. Since the LED 5 is lit by the DC power source, it is not necessary to drive the inverter circuit, and electromagnetic noise due to high voltage and high frequency is not generated, so that noise to taxi radio and radio can be prevented. Further, since the LED 5 has a much longer lighting life than the fluorescent lamp, it is not necessary to frequently perform replacement work. Further, since the constant voltage element 6 and the current limiting resistor 7 are provided in the lighting circuit, the luminance does not change even when the battery voltage changes.
[Selection] Figure 1

Description

The present invention relates to a vehicular indicator lamp that is attached to the roof of a vehicle such as a taxi and displays advertisement characters and the like.

Taxi is easy to see because it travels frequently on the road regardless of whether it is boarding or empty, and it is also a busy street in the station and bustling streets that are crowded with people waiting for customers. Easy to stick to. Therefore, providing an advertisement on the taxi body has a great advertising effect. Conventionally, an advertisement is provided on the rear window and roof of a taxi to advertise the company name and product name.

The vehicular indicator lamp attached to the upper part of the roof in the longitudinal direction of the vehicle body is composed of a substantially rectangular pedestal and a translucent cover attached to the pedestal. A light source such as a fluorescent lamp is provided on the top of the pedestal, and advertising characters for advertisement are displayed on the cover. A plurality of mounting portions are provided on the lower surface of the pedestal, and these mounting portions are bonded and fixed to the upper surface of the roof with an adhesive, a sucker or the like.

Accordingly, by turning on the incandescent bulb and the fluorescent lamp regardless of day and night, the advertising characters displayed on the cover can be clearly displayed, and the company name and the product name can be advertised to the general public while driving and stopping. This prior art is disclosed in Patent Document 1.

When a fluorescent lamp is used as a light source, there has been a problem that electromagnetic noise generated by turning on a high voltage / high frequency with an inverter circuit gives noise to a taxi radio or radio and causes noise interference.

In order to solve this problem, a fluorescent lamp apparatus is used in which a fluorescent lamp and an inverter circuit for supplying high-frequency power for lighting the fluorescent lamp are housed in a grounded metal case. The fluorescent lamp is covered with a punched metal mesh (punching metal) that is close to the whole except for the fluorescent lamp fixture side, and the punched metal mesh is electrically connected to the metal case of the fluorescent lamp fixture. The punching rate of the punched wire mesh is about 70%, and it was considered preferable to paint white. In addition to acting as a shield for inverter noise, this punched wire mesh also served as a proximity conductor in the rapid start lighting system. In addition, a transparent resin film obtained by vapor-depositing a grid-like metal film around a fluorescent lamp and grounding it on a metal case has been put into practical use. This prior art is disclosed in Patent Document 2.

Patent documents are described below.
Paragraphs [0002] to [0004] of Utility Model Registration No. 309181 [Prior Art] and [Means for Solving the Problems] of Japanese Utility Model Publication No. 6-28723

However, by covering the punched wire net around the fluorescent lamp, the luminance was lowered and the original luminance of the fluorescent lamp could not be obtained. Moreover, the lifetime of the fluorescent lamp is about 6000 hours, the lifetime is short, replacement is required, and a long-life light-emitting element that does not require maintenance has been desired. On the other hand, although the noise disclosed in Patent Document 2 has been solved within a certain range for noise interference caused by electromagnetic noise to radio and radio, it is not in a state in which the failure has been completely removed. There has also been a demand for measures to avoid such obstacles. Moreover, since the output from the inverter circuit also fluctuates with respect to the voltage fluctuation of the battery mounted on the vehicle, the luminance emitted from the fluorescent lamp fluctuated.

  Therefore, the present invention uses a light source that is free from noise interference due to electromagnetic noise, has a long service life and does not require substantial maintenance, and further does not cause fluctuations in the brightness of the light source even when the battery voltage fluctuates. The purpose is to provide.

In order to achieve the above object, a vehicle indicator lamp according to claim 1 of the present invention comprises:
Mounted on the top of the roof of the vehicle,
A pedestal provided with a light source and a lighting component for lighting the light source at the top;
A transparent cover on which advertising characters are displayed on the surface and attached to the pedestal to contain a light source;
In a vehicle indicator lamp comprising: a mounting member that mounts the pedestal on the roof of the vehicle;
The light source is a light emitting diode;
Circuit components for lighting the light emitting diode;
A component mounting base installed at the top of the pedestal, in which the light emitting diode and the lighting circuit component are installed,
It is characterized by providing.

Further, the vehicle indicator lamp according to claim 2 is in addition to the vehicle indicator lamp according to claim 1,
The component mounting base is provided with a reflector.
It is characterized by that.

In addition to the vehicle indicator lamp according to claim 1 or 2, the vehicle indicator lamp according to claim 3 is
The component mounting base is made of a heat dissipating metal.
It is characterized by that.

The light-emitting diode lighting circuit according to claim 4
In a lighting circuit that lights a light emitting diode using DC power as a power source,
A switch element for lighting the light emitting diode;
A constant voltage element and a current limiting resistor are connected and provided.
A constant current determined by the output voltage of the constant voltage element and the current limiting resistor is supplied to the light emitting diode;
It is characterized by that.

According to the vehicle indicator lamp according to claim 1,
Since the light source is a light emitting diode, a DC power source mounted on the vehicle is supplied and lit, so that no inverter circuit is required. Therefore, since electromagnetic noise due to high voltage and high frequency does not occur, taxi radio and radio noise can be prevented. In addition, since the light emitting diode has a longer lighting life than the fluorescent lamp, it is not necessary to frequently perform replacement work. Further, since the lighting circuit component is provided on the component mounting base together with the light emitting diode, it is not necessary to provide the lighting circuit component on the vehicle body side.

According to the vehicle indicator lamp according to claim 2,
Since the component mount is provided with a reflector, the downward light emitted from the light emitting diode can be efficiently reflected and irradiated upward.

According to the vehicle indicator lamp of claim 3,
Since the component mounting base is made of a heat dissipating metal, heat generated from the light emitting diode and the lighting circuit component is transmitted to the component mounting base and efficiently radiated to the outside.

According to the light-emitting diode lighting circuit according to claim 4,
Since a constant current determined by the output voltage of the constant voltage element and the current limiting resistor is supplied to the light emitting diode, the light emitting diode irradiates even when the voltage fluctuation of the DC power source mounted on the vehicle side occurs. The brightness can be kept constant.

According to the above-described device, a light-emitting diode that is free from noise disturbance due to electromagnetic noise, has a long service life and does not substantially require maintenance, and does not cause fluctuations in luminance of a light source even with respect to battery voltage fluctuations. It is possible to provide a display lamp for use.

  An embodiment of the present invention will be described with reference to FIGS. In addition, the code | symbol attached | subjected to the same component of each figure is the same.

1 is a front view of the vehicular indicator lamp 1, FIG. 2 is a plan view, FIG. 3 is a YY sectional view of the vehicular indicator lamp 1 of FIG. 1, and FIG. X sectional view, FIG. 5 shows a lighting circuit of the vehicular indicator lamp 1.

The vehicle indicator lamp 1 includes a substantially rectangular pedestal 2 molded from a synthetic resin such as plastic, a translucent cover 20 attached so as to enclose a light source and lighting components, and the lower surface of the pedestal 2. Includes a plurality of suction cups 3 for attaching the vehicle indicator lamp 1 to the roof of the vehicle body.

The pedestal 2 is provided with four fixed portions 2 a that protrude in the horizontal direction at the peripheral portion, and screw holes 2 b are opened at the central portion thereof, at four locations around the translucent cover 20. A screw is passed through a through hole (not shown) provided and screwed into a screw hole 2b opened in the base 2 to fix the cover 20. On the side surface of the cover 20, advertising characters such as company names and product names, designs, photographs, etc. are displayed, and the cover 20 is formed of an appropriately shaped shaped body that can transmit the irradiation light from the light source inside the cover 20. ing.

On the upper surface of the pedestal 2, a component mounting base 4 having a channel shape in cross section is fixed by a plurality of screws 14 via a pair of mounting brackets 13 (see FIG. 3). On the upper surface 4a of the component mounting base 4, a high-intensity light-emitting diode 5 (hereinafter referred to as LED) as a light source, an IC constant voltage element 6, a current limiting resistor 7, and a connection terminal 8 are fixed in close contact. Yes. The LED and other lighting circuit components (the constant voltage element 6, the current limiting resistor 7, the connection terminal 8, and the connection electric wire 12) are wired by the connection electric wire 12 so as to constitute the lighting circuit shown in FIG. ing. Since the LED is lit by the DC power supply of the battery 10, it is not necessary to drive the inverter circuit, and electromagnetic noise due to high voltage and high frequency is not generated, so that taxi radio and radio noise can be prevented. Further, since the LED has a much longer lighting life than the fluorescent lamp, it is not necessary to frequently perform replacement work. In the case of lighting of the fluorescent lamp, lighting circuit components such as an inverter are provided on the vehicle body side. However, in this embodiment, the lighting circuit components are provided on the component mounting base together with the light emitting diodes. It is no longer necessary to provide lighting circuit components on the side.

Since the component mounting base 4 is made of aluminum having good heat dissipation, it is possible to efficiently dissipate heat radiated from the lighting components such as the above-described LEDs.

One side surface of the pair of reflection films 9 is bent and bonded to both side surfaces of the component mounting base 4, and the other side is locked by a locking piece 2d provided on the base 2 (see FIG. 4). ). With this reflection film 9, it becomes possible to reflect the irradiation light irradiated downward from the LED upward.

As shown in FIG. 5, the battery 10 and the switch 11 are provided on the vehicle body side, and the other lighting components are provided on the vehicle indicator lamp 1 side. The current (I) flowing through the LED 5 becomes a constant value such that I = Vout / R by the output voltage (Vout) of the constant voltage element 6 and the current limiting resistor 7 (R). Therefore, even when the voltage of the battery 10 fluctuates, a constant current can be supplied, so that it is possible to eliminate fluctuations in the luminance of irradiation light from the LEDs.

As described above, according to this embodiment, a light emitting diode that is free from noise disturbance due to electromagnetic noise, has a long life, and that does not require substantial maintenance is used. It is possible to provide a vehicular indicator lamp that does not fluctuate.

In addition, this invention is not limited to said Example, A various application is possible in the range which does not change the summary of this invention. In the above embodiment, two LEDs are installed, but a plurality of LEDs can be installed in parallel. Further, the LED is not limited to a single color LED, and various emission colors can be obtained using a three color LED. The component mounting base 4 is made of aluminum, but may be any heat dissipating metal, and may be a synthetic metal such as copper or copper tungsten. The switch 11 is a simple manual switch, but other switch elements may be used. For example, the illuminance outside the vehicle may be detected by a sensor, and the LED may be turned on at an illuminance below a certain threshold value, or may be interlocked with another switch element.

In this embodiment, the LED 5 and the lighting circuit component are installed on the upper surface 4a of the component mounting base 4. However, these components may be installed on the side surface 4b. By installing the LED 5 on the side surface 4b, it becomes possible to irradiate the irradiation light in the horizontal direction. It is also possible to install the lighting circuit component on the inner lower surface 4c or the inner side surface 4d of the component mounting base 4 (see FIG. 4).

It is a front view of the indicator lamp for vehicles of an example. It is a top view of the indicator lamp for vehicles of an example. It is YY sectional drawing of the vehicle indicator light (FIG. 1) of an Example. It is XX sectional drawing of the vehicle indicator light (FIG. 1) of an Example. It is a block diagram of the circuit for lighting of the indicator light for vehicles of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle indicator light, 2 ... Base, 2d ... Locking piece, 3 ... Suction cup, 4 ... Component mounting base, 4a ... Upper surface of component mounting base, 4b ... -Side surface of the component mounting base, 4c ... Inner bottom surface of the component mounting base, 4d ... Inner side surface of the component mounting base, 5 ... LED, 6 ... Constant voltage element, 7 ... Current limiting resistor , 8 ... Terminal block, 9 ... Reflective sheet, 10 ... Battery, 11 ... Switch, 12 ... Connecting wire, 13 ... Mounting bracket, 14 ... Screw, 20, ... ·cover.

Claims (4)

Mounted on the top of the roof of the vehicle,
A pedestal provided with a light source and a part for turning on the light source at the top;
Advertising characters and the like are displayed on the surface, and a translucent cover attached to the pedestal to contain the light source;
In a vehicle indicator lamp comprising: a mounting member that mounts the pedestal on a roof of the vehicle;
The light source is a light emitting diode;
Circuit components for lighting the light emitting diode;
A component mounting base installed at the top of the pedestal, in which the light emitting diode and the lighting circuit component are installed,
A vehicle indicator lamp comprising: The component mounting base is provided with a reflector.
The vehicular indicator lamp according to claim 1. The component mounting base is made of a heat dissipating metal.
The vehicular indicator lamp according to claim 1 or 2, characterized in that In a lighting circuit that lights a light emitting diode using DC power as a power source,
A switch element for lighting the light emitting diode;
A constant voltage element and a current limiting resistor are connected and provided.
A constant current determined by the output voltage of the constant voltage element and the current limiting resistor is supplied to the light emitting diode;
A light-emitting diode lighting circuit.

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