JP3883243B2 - Simple exchange lighting system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a simple exchange type illumination device for illuminating an information display such as a black face meter or an LCD display module, and more particularly to a structure for ensuring easy exchange of a cold cathode tube.
[0002]
[Prior art]
In recent years, liquid crystal displays (hereinafter referred to as LCDs) tend to be frequently used as information displays inside and outside automobiles, 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 illuminating device for ensuring visibility at night or the like.
[0003]
That is, as a conventional black face meter illumination device, as shown in FIGS. 6 and 7, there is one in which a cold cathode tube 62 is integrally mounted on a substrate 61 on which a meter unit 60 is mounted.
As an LCD illumination device, as shown in FIGS. 8 and 9, there is an LCD display module 73 in which an LCD cell 70, a diffusion plate 71 and a prism 72 are incorporated, and a cold cathode tube 74 is incorporated as an integrated type.
[0004]
[Problems to be solved by the invention]
In any of the conventional illumination devices described above, the cold cathode tubes 62 and 74 are integrated into the black face meter substrate 61 or the LCD display module 73 as a single unit. For this reason, when it was necessary to replace the cold cathode tubes 62 and 74 with the extension of the life of the automobile, there was a problem that they could not be replaced or were extremely difficult.
Further, since the cold cathode tubes 62 and 74 contain harmful substances such as mercury, it is necessary to collect the cold cathode tubes 62 and 74 when the automobile equipped with the lighting device is disused. There was a problem that it was extremely difficult. In particular, the difficulty increases as the assembly unit including the cold cathode tubes 62 and 74 increases.
[0005]
An object of the present invention is to ensure good detachability of a cold cathode tube, to replace the cold cathode tube very easily, and to improve the recoverability of harmful substances contained in the cold cathode tube. An object of the present invention is to provide a simple exchange type illumination device that can perform the above.
[0006]
[Means for Solving the Problems]
According to the present invention, there is provided a cold cathode tube that illuminates an information display, and a pair of electrode portions that house the cold cathode tube and are electrically connected to the electrodes of the cold cathode tube. With a protective case provided outside,
The cold cathode tube is inserted into the information display in a state of being accommodated in a protective case, so that the information display is detachably held in a predetermined posture, and the electrodes are attached to the protective case. This can be solved by a simple exchange illumination device characterized in that it is electrically connected to the electrode on the information display side through each electrode portion.
[0007]
Further, the above-described problem is that a cold-cathode tube that illuminates the information display, and a pair of electrode portions that house the cold-cathode tube and are electrically connected to the respective electrodes of the cold-cathode tube are provided at both ends. A protective case provided in the direction and the protective case in which the cold cathode tube is housed are detachably held, and is detachably fitted to the information display, and each of the cold cathode tubes This can be solved by a simple exchange type illuminating device comprising a substrate for electrically connecting the electrode to the electrode on the information display side through each electrode portion of the protective case.
[0008]
Preferably, an inverter circuit is provided in the protective case, and the inverter circuit is electrically interposed between one electrode portion of the protective case and one electrode of the cold cathode tube.
[0009]
Furthermore, 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 the electrode on the information display side.
[0010]
In the simple exchange illumination device having the above-described configuration according to the present invention, the cold cathode tube for illuminating the information display is inserted into the information display in a state of being accommodated in the protective case, whereby the information display The electrodes are held in a detachable manner, and the electrodes are electrically connected to the electrodes on the information display side through the electrode portions of the protective case.
[0011]
Further, in the simple exchange type illumination device of the above configuration according to the present invention, the cold cathode tube accommodated in the protective case is detachably fitted to the information display unit together with the substrate while being detachably held on the substrate. Each electrode is electrically connected to the electrode on the information display side through each electrode portion of the protective case.
[0012]
Further, in the simple exchange type lighting device having the above-described configuration, an inverter circuit is provided in a protective case that houses the cold cathode tube, and the inverter circuit includes one electrode portion of the protective case and one electrode of the cold cathode tube. Is electrically interposed.
[0013]
Further, in the simple exchange type lighting device having the above-described configuration, an inverter circuit is provided on the substrate, and the inverter circuit is electrically interposed between one electrode portion of the protective case and the electrode on the information display side. The
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the simple exchange illumination device of 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 accommodated in a protective case in a simple exchange type lighting device of the present invention, and FIG. 2 is a diagram when the protective case in FIG. 1 is inserted into a black face meter. It is a perspective view which shows the state of.
[0015]
As shown in FIGS. 1 and 2, the information display 10 such as a black face meter or an LCD display module is illuminated by a cold cathode tube 30 (CCT) accommodated in a protective case 20.
[0016]
The protective case 20 is provided with a pair of electrode portions 22 exposed to the outside at both ends of a bottomless, cylindrical transparent protective pipe 21 made of resin or the like. In the protective case 20, the cold cathode tube 30 is housed inside the transparent protective pipe 21, and each electrode 31 of the cold cathode tube 30 is electrically connected to the electrode portion 22.
[0017]
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 displays a virtual image by directly illuminating the instruments or indirectly illuminating the instruments in a black face meter, for example. Further, the cold cathode tube 30 illuminates an LCD cell via a prism and a diffusion plate in, for example, an LCD display module, and functions as a backlight of the LCD.
[0018]
Further, the cold cathode tube 30 is inserted into the mounting hole 12 provided in the side surface of the device main body 11 of the information display 10 from the horizontal direction in FIG. By fitting the cap 23 attached to the portion into the attachment hole 12, the cap 23 is held in the device main body 11 so as to be removable in a predetermined posture. Each electrode 31 of the cold cathode tube 30 is connected to each electrode portion 22 of the protective case 20 via the electrode portion 22 of the protective case 20 by electrically connecting each electrode portion 22 of the protective case 20 to the electrode on the information display 10 side by spring contact. Are electrically connected to the electrodes on the information display 10 side.
[0019]
The effect | action of the simple exchange type illuminating device of this Embodiment is demonstrated.
The cold-cathode tube 30 that illuminates the information display 10 is inserted into the mounting hole 12 of the device main body 11 of the information display 10 in a state of being accommodated in the protective case 20, thereby providing a predetermined inside of the device main body 11. Removable in posture. 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 protective case 20.
[0020]
Next, a second embodiment of the simple exchange type illumination device of the present invention will be described in detail based on FIG. 3 and FIG. FIG. 3 is a perspective view showing a second embodiment of a cold cathode tube accommodated in a protective case in the simple exchange type lighting device of the present invention, and FIG. 4 is a diagram when the substrate in FIG. 3 is fitted to a black face meter. It is a perspective view which shows a state.
[0021]
As shown in FIGS. 3 and 4, an inverter circuit 41 is built in the bottomless cylindrical protective case 40. 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 a low voltage drive type.
Further, the mounting hole 12 shown in FIG. 2 is not provided on the side surface 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 removable substrate 47. That is, the substrate 47 is fitted to the hook 48 and the fitting groove 49 on the back surface of the device main body 46 of the information display 45 in a state where the protective case 40 in which the cold cathode tube 43 is accommodated is detachably held. It is detachably fitted by a hook (not shown) on the 46 side.
[0022]
Each electrode 44 of the cold cathode tube 43 in the protective case 40 held on the substrate 47 is electrically connected to each electrode portion 42 of the protective case 40 by a clamp contact with an electrode (not shown) on the information display 45 side. By being connected to the electrode, the electrode is electrically connected to the electrode on the information display 45 side through each electrode portion 42 of the protective case 40. Other configurations and operations are the same as those in the first embodiment.
[0023]
Next, a third embodiment of the simple exchange illumination device of the present invention will be described in detail with reference to FIG. As shown in FIG. 5, the 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 portion 53 of the protective case 51 and an electrode on the information display side (not shown).
[0024]
Further, the electrical connection between each electrode portion 53 of the protective case 51 and the electrode on the information display side is performed through a pair of electrical contact pins 54 projecting in the vicinity of the lower right end portion of the substrate 52 in FIG. Is called.
Furthermore, the substrate 52 is detachably attached to the back surface of the device main body (not shown) of the information display device via a hook 56 on the information display device side (not shown) fitted in the fitting groove 55. Other configurations and operations are the same as those in the second embodiment.
[0025]
As described above, according to the first embodiment, the cold-cathode tube 30 is inserted into the information display 10 while being accommodated in the protective case 20, so that the information display 10 is attached to and detached from the information display 10. Each electrode 31 is electrically connected to the electrode on the information display 10 side via each electrode portion 22 of the protective case 20 while being held as possible.
Further, according to the second and third embodiments, the cold cathode tubes 43 accommodated in the protective cases 40 and 51 are held in the substrates 47 and 52 in a detachable manner, and the information about the substrates 47 and 52 is provided. The electrode 45 is detachably fitted to the display device 45, and the electrodes 44 are electrically connected to the electrodes on the information display device 45 side through the electrode portions 42 and 53 of the protective cases 40 and 51, respectively.
[0026]
Therefore, good detachability of the cold cathode tubes 30 and 43 can be ensured, and the cold cathode tubes 30 and 43 can be replaced very easily. In particular, when an 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 disposing of an automobile equipped with a lighting device, the cold cathode tubes 30, 43 can be removed from the lighting device together with the protective cases 20, 40, 51 or the substrates 47, 52, and are included in the cold cathode tubes 30, 43. Hazardous substances such as mercury can be recovered easily and reliably. That is, harmful substances can be recovered in the minimum assembly unit including the cold cathode tubes 30 and 43 or the cold cathode tubes 30 and 43.
[0027]
Further, according to the second and third embodiments, the inverter circuits 41 and 50 are provided in the protective case 40 (second embodiment) or on the substrate 52 (third embodiment). High voltage can be reliably prevented from being applied, and high durability can be ensured.
[0028]
In the first embodiment, the protective case 20 that does not incorporate the inverter circuit is used. In the second embodiment, the protective case 40 that includes the inverter circuit 41 is used. However, the present invention is not limited to this. is not. That is, in the first embodiment, a protective case with a built-in inverter circuit may be used, and in the second embodiment, a protective case without a built-in inverter circuit may be used.
[0029]
【The invention's effect】
As described above, according to the simple exchange type illumination device of the present invention, the cold cathode tube can be attached to and detached from the information display device in a predetermined posture by being inserted into the information display device while being accommodated in the protective case. While being held, each electrode is electrically connected to an electrode on the information display side via each electrode portion of the protective case.
Therefore, the cold cathode tube can be detached from the information display unit together with the protective case, and good detachability of the cold cathode tube can be ensured. Therefore, the cold cathode tube can be easily replaced, and harmful substances contained in the cold cathode tube can be easily recovered.
[0030]
In addition, the cold cathode tube accommodated in the protective case is detachably fitted to the information display unit with the substrate in a state where the cold cathode tube is detachably held on the substrate, and each electrode is connected to the information through each electrode portion of the protective case. It is electrically connected to the electrode on the display side. Therefore, the cold cathode tube accommodated in the protective case can be detached from the information display unit together with the substrate, and the protective case can be detached from the substrate, thereby ensuring good detachability of the cold cathode tube. . Therefore, the cold cathode tube can be easily replaced, and harmful substances contained in the cold cathode tube can be easily recovered.
[0031]
An inverter circuit is provided in a protective case that accommodates the cold cathode tube, and the inverter circuit is electrically interposed between one electrode portion of the protective case and one electrode of the cold cathode tube.
Therefore, it is possible to reliably prevent a high voltage from being applied to the contact and to ensure high durability while ensuring good exchangeability of the cold cathode tube and recoverability of harmful substances. Can do.
[0032]
Further, an inverter circuit is provided on the substrate, and the inverter circuit is electrically interposed between one electrode portion of the protective case and the electrode on the information display side.
Therefore, it is possible to reliably prevent a high voltage from being applied to the contact and to ensure high durability while ensuring good exchangeability of the cold cathode tube and recoverability of harmful substances. Can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a simple exchange type illumination device according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which the simple exchange illumination device in FIG. 1 is inserted.
FIG. 3 is a perspective view showing a simple exchange type illumination device according to a second embodiment of the present invention.
4 is a perspective view showing a mounting state of the simple exchange type illumination device in FIG. 3. FIG.
FIG. 5 is a perspective view showing a simple exchange type illumination device according to a third embodiment of the present invention.
FIG. 6 is a front view showing an outline of a black face meter to which a conventional illumination device is applied.
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.
9 is a side sectional view of the LCD display module of FIG. 8. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Information indicator 11 Apparatus 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)

A cold cathode tube which illuminates the information display, no provided at opposite ends outer side of the pair of electrode portions are electrically connected with each electrode of the cold cathode tube with housing the cold cathode tube within The cold cathode tube is inserted into an information display in a state of being accommodated in the protective case, and is detachably held in a predetermined posture in the information display. In addition, the simple exchange type illumination device, wherein the electrodes are electrically connected to the electrodes on the information display side through the electrode portions of the protective case. A cold cathode tube which illuminates the information display, no provided at opposite ends outer side of the pair of electrode portions are electrically connected with each electrode of the cold cathode tube with housing the cold cathode tube within A bottom cylindrical protective case and the protective case in which the cold cathode tube is housed are detachably held, and are detachably fitted to the information display and each electrode of the cold cathode tube And a substrate that is electrically connected to the electrode on the information display side through each electrode portion of the protective case.  2. An inverter circuit is provided in the protective case, and the inverter circuit is electrically interposed between the one electrode portion of the protective case and the one electrode of the cold cathode tube. Or the simple exchange type illuminating device of 2.  3. The simple exchange type illumination according to claim 2, wherein an inverter circuit is provided on the substrate, and the inverter circuit is electrically interposed between one electrode portion of the protective case and the electrode on the information display side. apparatus.

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