JPH10208535A - Handy replacement type lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handy replacement type lighting device, which can assure an excellent detachability of a cold cathode ray tube, and an excellent recovery property of noxious materials contained in the cold cathode ray tube. SOLUTION: This handy replacement type lighting device is detachably mounted in a specified posture in an information indicator in a state that a cold cathode ray tube 30 lighting the information indicator is housed in a protection case 20. The respective electrodes 31 of the cold cathode ray tube 30 are electrically connected with the electrodes of the information indicator side by way of the respective electrode parts 22 of the protection case 20. Besides, the cold cathode ray tube 30 can be easily mounted to/demounted from the information indicator together with the protection case 20 at the time of maintenance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple exchangeable illuminating device for illuminating an information display such as a black face meter or an LCD display module, and more particularly, to ensuring easy exchangeability of cold cathode tubes. Regarding the structure.

[0002]

2. Description of the Related Art In recent years, as information displays inside and outside automobiles,
Liquid crystal displays (hereinafter, referred to as LCDs) tend to be frequently used, and black-face type meters (hereinafter, referred to as black face meters) are also widely used. In these information displays, a cold cathode tube (CCT) is used as an illumination device for ensuring visibility at night or the like.

That is, as a conventional black face meter illumination device, as shown in FIGS. 6 and 7, there is a device in which a cold cathode tube 62 is integrally mounted on a substrate 61 on which a meter unit 60 is mounted. . Also, LC
As an illumination device of D, an LCD as shown in FIGS.
L incorporating a cell 70, a diffusion plate 71 and a prism 72
There is a CD display module 73 in which a cold cathode tube 74 is integrated.

[0004]

In any of the above-mentioned conventional lighting devices, the cold cathode fluorescent lamps 62 and 74 are integrated into the black face meter substrate 61 or the LCD display module 73 as an integral unit. For this reason, when it becomes necessary to replace the cold cathode tubes 62 and 74 with the prolongation of the life of the automobile, there is a problem that the cold cathode tubes 62 and 74 cannot be replaced or are extremely difficult. In addition, the cold cathode fluorescent lamp 6
2 and 74 contain harmful substances such as mercury.
It is necessary to recover 2,74, but there is a problem that this recovery is extremely difficult. In particular, the cold cathode tubes 62 and 74
The difficulty increases as the size of the assembling unit including (1) increases.

SUMMARY OF THE INVENTION It is an object of the present invention to ensure good removability of a cold cathode tube, replace a cold cathode tube very easily, and improve the recoverability of harmful substances contained in the cold cathode tube. An object of the present invention is to provide a simple exchangeable lighting device that can be improved.

[0006]

The object of the present invention is to provide a cold-cathode tube for illuminating an information display, and to accommodate the cold-cathode tube therein and electrically connect each electrode of the cold-cathode tube. A protective case provided with a pair of connected electrode portions outside both ends, and the cold cathode tube is inserted into the information display in a state of being housed in the protective case, thereby displaying the information. A simple exchange type, wherein the electrodes are detachably held in a predetermined posture on the display and the respective electrodes are electrically connected to the electrodes on the information display side via the respective electrode portions of the protective case. This can be solved by a lighting device.

Another object of the present invention is to provide a cold-cathode tube for illuminating an information display, and a pair of electrode portions accommodating the cold-cathode tube therein and electrically connected to the respective electrodes of the cold-cathode tube. A protective case provided outside both ends and the protective case accommodating the cold cathode tube therein are detachably fitted to the information display in a state where the protective case is detachably held, and the cold cathode is provided. The problem can be solved by a simple exchangeable lighting device, comprising: a substrate for electrically connecting each electrode of the tube to the information display side electrode via each electrode portion of the protective case.

Preferably, an inverter circuit is provided in the protection case, and the inverter circuit is electrically interposed between one electrode of the protection case and one electrode of the cold-cathode tube.

Further, it is preferable that an inverter circuit is provided on the substrate, and the inverter circuit is electrically interposed between one electrode portion of the protective case and an electrode on the information display side.

[0010] In the simple exchangeable lighting device having the above-described structure according to the present invention, the cold cathode tube illuminating the information display is inserted into the information display in a state of being housed in the protective case. And the electrodes are electrically connected to the electrodes on the information display side via the respective electrode portions of the protective case.

[0011] In the simple exchangeable lighting device having the above structure according to the present invention, the cold cathode tube accommodated in the protective case can be detachably attached to the information display together with the substrate while being held detachably on the substrate. And each electrode is electrically connected to an electrode on the information display side via each electrode portion of the protective case.

Further, in the simple exchangeable lighting device having the above-mentioned structure, an inverter circuit is provided in a protection case for accommodating the cold cathode tube, and the inverter circuit is provided with one electrode of the protection case and one of the cold cathode tubes. Between the electrodes.

Further, in the simple exchangeable lighting device having the above-mentioned structure, an inverter circuit is provided on the substrate, and the inverter circuit is electrically connected between one electrode portion of the protective case and the electrode on the information display side. Intervened.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of an easily replaceable illumination device according to the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view showing a first embodiment of a cold-cathode tube housed in a protective case in the simple exchangeable lighting device of the present invention. FIG. 2 is a diagram showing the case where the protective case in FIG. 1 is inserted into a black face meter. It is a perspective view which shows the state of.

As shown in FIGS. 1 and 2, an information display 10 such as a black face meter or an LCD display module includes a cold cathode tube 30 housed in a protective case 20.
Illuminated by (CCT).

The protective case 20 has a pair of electrode portions 22 which are exposed to the outside at both ends of a cylindrical transparent protective pipe 21 made of resin or the like. The protection case 20 includes the transparent protection pipe 21 in which the cold cathode tubes 30 are accommodated, and the electrode unit 22 includes the electrodes 3 of the cold cathode tubes 30.
1 are electrically connected to each other.

The cold-cathode tube 30 illuminates instruments provided in the device main body 11 of the information display 10. That is, the cold cathode tube 30 illuminates the instruments directly or indirectly illuminates the instruments in a black face meter, for example, to display a virtual image. The cold-cathode tube 30 is, for example, LC
In the D display module, the LCD cell is illuminated through the prism and the diffusion plate, and functions as a backlight of the LCD.

The cold cathode tube 30 is inserted into the mounting hole 12 provided on the side of the device body 11 of the information display 10 from the horizontal direction in FIG. Cap 2 attached to the end of 20
3 is fitted into the mounting hole 12 so that the device body 11
It is detachably held in a predetermined posture. Cold cathode tube 30
Each electrode 31 of the protective case 20 corresponds to each electrode portion 2
2 is electrically connected to the electrode on the information display 10 side by spring contact, so that each electrode 2
2 and electrically connected to the electrodes on the information display 10 side.

The operation of the simple exchangeable lighting device of the present embodiment will be described. Cold cathode tube 3 illuminating the information display 10
The information display device 0 is detachably held in the device main body 11 in a predetermined posture by being inserted into the mounting hole 12 of the device main body 11 of the information display device 10 while being housed in the protective case 20. In addition, each electrode 31 of the cold cathode tube 30 is electrically connected to an electrode on the information display 10 side via each electrode portion 22 of the protective case 20. Further, the cold cathode tube 30 is easily detached from the information display 10 for each protection case 20.

Next, the second embodiment of the simple exchangeable lighting device of the present invention will be described.
An embodiment will be described in detail with reference to FIGS. FIG. 3 is a perspective view showing a second embodiment of the cold-cathode tube housed in the protective case in the simple exchangeable lighting device of the present invention, and FIG. 4 is a diagram showing a state where the substrate in FIG. It is a perspective view showing a state.

As shown in FIG. 3 and FIG.
In 0, an inverter circuit 41 is built. The inverter circuit 41 is electrically interposed between one electrode portion 42 of the protective case 40 and one electrode 44 of the cold cathode tube 43, and is of a low voltage drive type. Further, the mounting hole 12 shown in FIG. 2 is not provided on the side of the device main body 46 of the information display 45, and the entire back surface of the device main body 46 is constituted by a detachable substrate 47. That is, the substrate 47 is mounted on the device main body 4 of the information display 45 in a state where the protection case 40 accommodating the cold cathode tubes 43 is detachably held.
6 is detachably fitted to the back of the device main body 46 by a hook (not shown) fitted to the hook 48 and the fitting groove 49 on the back surface.

The protective case 4 held on the substrate 47
Each of the electrodes 44 of the cold cathode tube 43 in the protection case 40 is electrically connected to an electrode (not shown) on the information display 45 side by clamp contact with each of the electrode portions 42 of the protection case 40. Are electrically connected to the electrodes on the information display 45 side through the respective electrode portions 42. Other configurations and operations are the same as those in the first embodiment.

Next, the third embodiment of the easily replaceable illumination device according to the present invention will be described.
An embodiment will be described in detail with reference to FIG. As shown in FIG. 5, inverter circuit 50 in the present embodiment
Is not built in the protective case 51 but is provided on the substrate 52. The inverter circuit 50 is electrically interposed between one electrode 53 of the protective case 51 and an electrode on the information display (not shown).

The electrical connection between each electrode 53 of the protective case 51 and the electrode on the information display side is made by connecting the
This is performed via a pair of electrical contact pins 54 protruding near the middle lower right end. Further, the substrate 52 is detachably attached to the back of the device main body (not shown) of the information display via a hook 56 on the information display (not shown) fitted into the fitting groove 55. Other configurations and operations are the same as those of the second embodiment.

As described above, according to the first embodiment, the cold-cathode tube 30 is inserted into the information display 10 while being housed in the protective case 20, so that the information display 10 has a predetermined shape. The electrode 31 is detachably held in the posture, and each electrode 31 is electrically connected to an electrode on the information display 10 side via each electrode portion 22 of the protective case 20. Further, according to the second and third embodiments, the protective cases 40 and 51 are provided.
The cold cathode tubes 43 accommodated in the first and second substrates 47 and 52 are detachably fitted to the information display 45 together with the substrates 47 and 52, and each electrode 44 is connected to the protective case 4.
Information display 45 through the respective electrode portions 42 and 53 of 0 and 51.
Electrically connected to the side electrode.

Therefore, good removability of the cold cathode tubes 30, 43 can be secured, and the cold cathode tubes 30, 43 can be replaced very easily. In particular, when the LCD display is used in a large vehicle requiring a long life, the cold cathode tubes 30 and 43 as the backlight can be easily replaced. In addition, when the lighting device is mounted on a scrapped automobile, the cold cathode tubes 30 and 43 are connected to the protective cases 20 and 4.
Each of 0 and 51 or the substrates 47 and 52 can be removed from the lighting device, and harmful substances such as mercury contained in the cold cathode tubes 30 and 43 can be easily and reliably recovered. That is, the harmful substances can be collected by the cold cathode tubes 30, 43 or the minimum assembly unit including the cold cathode tubes 30, 43.

Further, according to the second and third embodiments, the inside of the protective case 40 (second embodiment) or the substrate 52
Since the inverter circuits 41 and 50 are provided on the upper side (third embodiment), it is possible to reliably prevent a high voltage from being applied to the contacts, and to ensure high durability.

In the first embodiment, the protection case 20 having no built-in inverter circuit is used.
In the embodiment, the protection case 40 having the built-in inverter circuit 41 is used, but the invention is not limited to this. That is, in the first embodiment, a protection case having a built-in inverter circuit may be used. In the second embodiment, a protection case having no built-in inverter circuit may be used.

[0029]

As described above, according to the simple exchangeable lighting device of the present invention, the cold cathode tube is inserted into the information display in a state of being housed in the protective case, so that the information display has a predetermined shape. The electrodes are held detachably in the posture, and each electrode is electrically connected to an electrode on the information display side through each electrode portion of the protective case. Therefore, the cold cathode tube can be detached from the information display together with the protective case, and good detachability of the cold cathode tube can be secured. Therefore, the cold cathode tubes can be easily replaced, and harmful substances contained in the cold cathode tubes can be easily collected.

The cold cathode tube accommodated in the protective case is detachably fitted to the information display together with the substrate while being held detachably on the substrate, and each electrode is connected to each electrode portion of the protective case. Is electrically connected to the electrode on the information display side via the power supply. Therefore, the cold cathode tube accommodated in the protective case can be detached from the information display together with the substrate together with the substrate, and the protective case can be detached from the substrate together with the detachable cold cathode tube. . Therefore, the cold cathode tubes can be easily replaced, and harmful substances contained in the cold cathode tubes can be easily collected.

Further, an inverter circuit is provided in a protective case for accommodating the cold cathode tubes, and the inverter circuit includes:
It is electrically interposed between one electrode part of the protective case and one electrode of the cold cathode tube. Accordingly, it is possible to reliably prevent high voltage from being applied to the contacts and to ensure high durability while ensuring good exchangeability of the cold cathode tubes and recoverability of harmful substances. Can be.

Further, an inverter circuit is provided on the substrate, and the inverter circuit is electrically interposed between one electrode portion of the protection case and the electrode on the information display side. Accordingly, it is possible to reliably prevent the high voltage from being applied to the contacts and secure high durability, while ensuring good exchangeability of the cold cathode tubes and recoverability of harmful substances. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a simple exchangeable lighting device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a fitted state of the simple exchangeable lighting device in FIG. 1;

FIG. 3 is a perspective view showing a simple exchangeable lighting device according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a mounted state of the simple exchangeable lighting device in FIG. 3;

FIG. 5 is a perspective view showing a simple exchangeable lighting device according to a third embodiment of the present invention.

FIG. 6 is a front view schematically showing a black face meter to which a conventional lighting device is applied.

FIG. 7 is a side sectional view of the black face meter of FIG. 6;

FIG. 8 is a front view schematically showing an LCD display module to which a conventional lighting device is applied.

FIG. 9 is a side sectional view of the LCD display module of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Information display 11 Equipment main body 20 Protective case 21 Transparent protective pipe 22 Electrode part 30 Cold cathode tube 31 Electrode 40 Protective case 41 Inverter circuit 42 Electrode part 43 Cold cathode tube 44 Electrode 45 Information display 46 Equipment main body 47 Substrate 50 Inverter circuit 51 protective case 52 substrate 53 electrode part

Claims (4)

[Claims] 1. A cold-cathode tube for illuminating an information display, and a pair of electrode portions accommodating the cold-cathode tube therein and electrically connected to respective electrodes of the cold-cathode tube at both ends. The cold cathode tube is inserted into an information display in a state accommodated in the protection case, and is detachably held in the information display in a predetermined posture. In addition, the simple exchange type lighting device is characterized in that the respective electrodes are electrically connected to the electrodes on the information display side via the respective electrode portions of the protective case. 2. A cold-cathode tube for illuminating an information display device, and a pair of electrode portions accommodating the cold-cathode tube therein and electrically connected to respective electrodes of the cold-cathode tube at both ends. And the protection case, in which the cold-cathode tube is housed therein, is detachably fitted to the information display and the respective electrodes of the cold-cathode tube. A substrate which is electrically connected to the information display side electrode via the respective electrode portions of the protective case. 3. An inverter circuit is provided in the protection case, and the inverter circuit is electrically interposed between the one electrode portion of the protection case and the one electrode of the cold cathode tube. 3. The simple exchangeable lighting device according to claim 1, wherein: 4. An inverter circuit is provided on the substrate, and the inverter circuit is electrically interposed between one electrode portion of the protective case and an electrode on the information display side. Simple replacement type lighting device.