CN1139253A

CN1139253A - Indicator for oil feeder

Info

Publication number: CN1139253A
Application number: CN 95108137
Authority: CN
Inventors: 小林健治; 山崎健吾; 冈庭弘幸
Original assignee: TATSUNO MECHATRONICS CORP
Current assignee: TATSUNO MECHATRONICS CORP
Priority date: 1995-06-29
Filing date: 1995-06-29
Publication date: 1997-01-01
Anticipated expiration: 2015-06-29
Also published as: CN1097255C

Abstract

In the said display unit, the transmisive liquid crystal display board is mounted onto one side of the printed base board with an interval in between. One back illuminating part with its thickness smaller than the said interval is inserted into the interval, and it is mounted detachably on the printed base board and electrically connected to the printed base board via the connector. Therefore, the back illuminating part may be replaced easily for saving.

Description

Be used for the oil feeder display device

The present invention relates to a kind of display device of supplying with the oil feeder of motor vehicle fuel in the refuelling station.

The employing that has in the display device of existing oil feeder the transmission-type liquid crystal display element, as the back light parts of the display device that has adopted the transmission-type liquid crystal display element, use components and parts as cold-cathode tube or light emitting diode (LED) and so on.In general, in this display device the serviceable life of back light parts shorter than serviceable life of liquid crystal display cells, so this situation is usually arranged, promptly when liquid crystal display cells still can use, and back light has not worked, and at this moment is necessary only to change the back light parts.

But in existing oil feeder display device, as used cold-cathode tube as the back light parts, can change cold-cathode tube out of joint in one one ground, and under the back light parts situation of using LED, because the less a plurality of LED that compare are configured on the surface plate, they are bonded on the printed base plate with double sticky tape, thus only more part back light parts be difficult, that is to say the back light parts must and liquid crystal display cells change together, thereby can cause waste.

So, the purpose of this invention is to provide a kind of oil feeder display device, it has used the transmission-type liquid crystal display element, can only change the back light parts at an easy rate, thereby can not cause waste.

In order to achieve the above object, the display device that is used for oil feeder of the present invention is to constitute like this: leave on a side surface of printed base plate and assembling transmissive type liquid crystal display panel with gap, littler and have and certain thicknessly be box-like back light portion and can freely insert above-mentioned gap than this gap, and by the stationary installation of loading onto easily between back light portion and the printed base plate or unloading is assembled, and the plinth of the electric wire of drawing from a side of described back light portion is connected with the plinth on being arranged on above-mentioned printed base plate.

In order to make back light portion that the bright effect that shows can be arranged, described back light portion preferably has the LED that is configured at regular intervals by a plurality of light emitting diodes (LED) to set plate.In order to make simple structure, make easily, preferably by being assemblied on the above-mentioned printed base plate in the terminal pins that is provided with on the side of described transmissive type liquid crystal display panel, above-mentioned terminal pins also has supporting role for signal wire with the while.Described back light portion is preferably by forming with the lower part: the framework of rectangle, and it has the foot on four jiaos that are used to be assemblied in described printed base plate; Diffuser plate, it is assemblied in this side of described transmissive type liquid crystal display panel of described framework; LED sets plate, and it is thinner than the foot of described framework, and is configured in the described printed base plate side of described framework, thereby this structure can make light diffusion make the people be more prone to watch by light diffusing sheet, and described back light portion can be dispelled the heat better; For the expression that makes described display device can be clear, described back light portion preferably has the color of yellow system, and the colour system of the also best and described back light of described diffuser plate portion is identical, and the while, described diffuser plate also preferably had fluorescent characteristic.For back light portion can be installed or unload easily, described stationary installation is to insert the screw that leads to the above-mentioned framework foot from the opposite side spiral of described printed base plate.

Among the present invention, be made for box-like described back light portion and can insert formed gap between transmissive type liquid crystal display panel and the printed base plate easily, can be easily on described printed base plate, described back light portion be loaded and unloaded by stationary installations such as screws, and, distribution can connect easily by plinth, like this, when finish the serviceable life of LED, also there is no need described transmissive type liquid crystal display panel and described back light portion are changed together, and can only back light portion more be changed easily, thereby avoid waste.

Fig. 1 is the sectional view of the display device that is used for oil feeder of the embodiment of the invention;

Fig. 2 is the display unit decomposition diagram of the display device that is used for oil feeder of the embodiment of the invention;

Fig. 3 is the skeleton view of display unit under assembled state of the display device that is used for oil feeder of the embodiment of the invention;

Fig. 4 is the skeleton view of the oil feeder of having of the embodiment of the invention display device that is used for oil feeder.

Specify embodiments of the invention according to diagram below.

As shown in drawings, the display device that is used for oil feeder 10 of present embodiment is to constitute like this: transmissive type liquid crystal display panel 12 is assemblied in the surface of printed base plate 31, between them, be provided with certain clearance, box-like back light portion 21 inserts in the above-mentioned gap, and be fixed on the printed base plate 31 by stationary installations such as screws 35, said structure forms expression portion 11, this display part 11 is incorporated in the armored cassette 41, and the armored cassette 41 of having taken in above-mentioned display part 11 is assemblied in the inboard of front panel 5 of the oil dropping apparatus 2 of oil feeder 1 by the not shown device that goes out.

Transmissive type liquid crystal display panel 12 has following structure: the display element 13 that will be used for the segment electrode structure of display digit or English alphabet is lined up long rectangular plate shape sidewards, the end of the both sides on the long side direction of this long rectangular plate shape is provided with a plurality of terminal pins 14 as the signal wire connecting end that drives display element 13, the display surface of this pin one 4 and above-mentioned display element 13 is provided with meeting at right angles, and the display surface of its direction and above-mentioned display element 13 is opposite, insert the fore-end of the terminal pins 14 of transmissive type liquid crystal display panel 12 in the terminal hole 32 that is provided with on the printed base plate 31 like this and weld, between transmissive type liquid crystal display panel 12 and printed base plate 31, be formed with the gap of certain width.The back is inserted into the back light portion that is elaborated in the above-mentioned gap.Terminal pins 14 should have certain rigid, can support transmissive type liquid crystal display panel 12 fully after it is welded to printed base plate 31.That is, terminal pins 14 is that the signal wire of transmissive type liquid crystal display panel 12 also plays a supportive role to transmissive type liquid crystal display panel 12 simultaneously.

Back light portion 21 is provided with near the back side of transmissive type liquid crystal display panel 12, and it sets plate 22, framework 23, diffuser plate 24 by light emitting diode (LED) and is constituted.It is to constitute like this that LED sets plate 22: dispose a plurality of light emitting diodes (LED) 22a by certain interval on the surface of the thin plate that forms rectangle, light emitting diode 22a is connected with the distribution 22b with edge connector 22c that is pooled to end side like this.Set the reflection of preferably carrying out light to be reflected on the surface of plate 22 handles at the LED that has disposed light emitting diode (LED) 22a.By set configuration LED 22a on the plate 22 at LED on the unit area a certain number ofly, make light emitting diode be rectangular arrangement, their adjacent spaces for example can be about 4mm～10mm, framework 23 is to constitute like this: for example it is integrated with plastic or other material, form shaped as frame haply with framework 23a, promising and printed base plate 31 contacts and the 23b of foot (everywhere) that is provided with on its four jiaos, and is formed with the distribution cover 23c of guiding distribution 22b on the side of framework 23a.The height of foot 23 should make set the thickness of plate 22 than LED will be a little more greatly.Like this, LED sets on the side (rear side) that plate 22 is bonded in framework 23a, and in order to avoid four 23b of foot of framework 23, LED sets plate 22 and is provided with excision portion.At this moment distribution 22b is guided by distribution cover 23c.Diffuser plate 24 is the plates that carry out the light diffusion for the light that sends from LED 22a, for example at the illuminant colour of LED 22a when be yellow, and this yellow of correspondence, diffuser plate 24 also should use the sodium yellow diffuser plate with colour system.Such diffuser plate 24 can be to add to load onto light diffusing sheet on the surface of transparent acrylic panel, also available just have a light diffusing and transparent panel itself, and, preferably use and contain fluorescent material can send fluorescence on shining when light material with fluorescent characteristic.Like this, diffuser plate 24 is bonded on the opposite side (face side) of framework 23a of framework 23.Promptly, back light portion 21 is rectangular on the whole box-like, it is more thinner a little than the gap between transmissive type liquid crystal display panel 12 and the printed base plate 31, and can pass through diffuser plate 24, evenly spread being assemblied in the light that LED on the framework 23 sets the LED 22a of plate 22, thereby have function as the back light of transmissive type liquid crystal display panel 12.

Printed base plate 31 is for driving the circuit board of display element 13, also is simultaneously the substrate of assembling transmissive type liquid crystal display panel 12 and back light portion 21, is equipped with as the integrated circuit (IC) 33 of the parts of liquid crystal display drive circuit on its face (back side) etc.As above-mentioned, on the another side (surface) of printed base plate 31, be provided with transmissive type liquid crystal display panel 12 with the certain interval assembling, back light portion 21 can never be provided with the side of terminal pins 14 and insert above-mentioned gap easily.And, on printed base plate 31 and insert the foot 23b corresponding section of the back light portion 21 in gap, be formed with a plurality of (four) pilot hole 34 of perforation, to insert the above-mentioned pilot hole 34 as the screw 35 of stationary installation from the back side of printed base plate 31, make back light portion 21 be fixed on the printed base plate 31 by screwing in the 23b of foot.At this moment, plinth 22c is connected with plinth 39 on being arranged on printed base plate 31.This plinth 39 is connected with the liquid crystal drive loop.The display part of being assembled by transmissive type liquid crystal display panel 12 and back light portion 21 and printed base plate 31 11 is incorporated in the armored cassette 14, be formed at the screw 37 and the adjusting pad 38 of four jiaos of pilot holes 36 of printed base plate 31 by insertion, display part 11 is fixed on the inside of armored cassette 41.

The size of armored cassette 41 is for can take in display part 11, and it is formed by pulling down two and half box bodys that can open behind the screw, and it is formed with window 42 on the part relative with transmissive type liquid crystal display panel 12, be equiped with transparent panel 43 on window 42.Like this, the armored cassette 41 of taking in display part 11 fixedly is assemblied on the medial surface of the display part 6 that is formed on the front panel 5.In addition, on oil feeder 1, the 7th, lubricator hose, the 8th, to oil ejector.

For as the above-mentioned display device that is used for oil feeder 10 that constitutes, when LED22a does not work owing to reasons such as serviceable lifes, at first open armored cassette 41, unload screw 37, display unit 11 is taken out from armored cassette 41.Then, unload screw 35 from the back side of printed base plate 31, so just removed fixing to back light portion 21, plinth 22c is unloaded from plinth 39, from the side back light portion 21 is outwards extracted, so just can will take out the gap of back light portion 21 between printed base plate 31 and transmissive type liquid crystal display panel 12.Like this, also the back light portion 21 of other new assembling can be inserted above-mentioned gap and be assembled into display part 11 once more, this display unit 11 can be reinstalled and continue in the armored cassette 41 to use.Defective back light portion 21 for unloading can set original LED plate 22 and unload from the adhesion of framework 23, and then bondingly new LED and set plate 22, and this back light portion 21 can be reused again like this.As mentioned above, the display device that is used for oil feeder 10 of present embodiment, can insert easily between transmissive type liquid crystal display panel 12 and the printed base plate 31 in the formed gap forming box-like back light portion 21, and by stationary installations such as screws back light portion 21 can be assembled on the printed base plate 31 or from printed base plate 31 easily to unload, and, also can make connection easily between the distribution by plinth, so when LED 22a finishes serviceable life, there is no need transmissive type liquid crystal display panel 12 and it is taken off together and change, itself to take off replacing just passable as long as easily LED is set plate 22.In addition, because back light portion 21 can insert in the gap between transmissive type liquid crystal display panel 12 and the printed base plate 31 easily, become easily so change back light portion 21, and radiating condition becomes better, the fault of parts also just less.

In addition, in the foregoing description, back light portion 21 be by with the both sides of framework 23 mutually the LED of adhesion set plate 22 and diffuser plate 24 is formed, it should make thinner slightly box-like of ratio gap at least, but might not be confined to the structure of present embodiment.In addition,,, and consider radiating condition, can at random determine its size as long as enable to take out back light portion 21 easily for the gap between transmissive type liquid crystal display panel 12 and the printed base plate 31.

More than be to an explanation that preferred embodiment is carried out of the present invention, can certainly in not exceeding the scope of spirit of the present invention, carry out all improvement and change.

As mentioned above, the display device that is used for oil feeder of the present invention, can insert easily between transmissive type liquid crystal display panel 12 and the printed base plate in the formed interval forming box-like back light portion, and by stationary installations such as screws back light portion can be assembled on the printed base plate or from printed base plate easily to unload, and, also can make connection easily between the distribution by plinth, so when LED finishes serviceable life, there is no need transmissive type liquid crystal display panel and it is taken off together and change, as long as it is just passable to change back light portion, thereby can avoid waste.

Claims

1, a kind of display device that is used for oil feeder, it is characterized in that: in the surface of printed base plate one side, leave and assembling transmissive type liquid crystal display panel with gap, its thickness is than little being box-like back light portion and can inserting in the described gap easily in described gap, described back light portion and described printed base plate are assembled together by the stationary installation that can load and unload easily, and the plinth of the electric wire of drawing from a side of described back light portion is connected with the plinth that described printed base plate is provided with.

2, the display device that is used for oil feeder according to claim 1 is characterized in that: described back light portion has the LED that a plurality of light emitting diodes (LED) are provided with at regular intervals and sets plate.

3, the described or described display device that is used for oil feeder of claim 2 according to claim 1, it is characterized in that: described transmissive type liquid crystal display panel is to be assemblied on the described printed base plate by the terminal pins that is arranged on its side, and described terminal pins is that signal wire has supporting role again.

4, according to claim 2 or the described display device that is used for oil feeder of claim 3, it is characterized in that: described back light portion is made of following several parts: the rectangle framework, and it has the foot on four jiaos that are used to be assemblied in described printed base plate; Diffuser plate, it is assemblied in the described transmissive type liquid crystal display panel side of described framework; LED sets plate, and it is more thinner than the described foot that is used to be assemblied on the described printed base plate of described framework.

5, the display device that is used for oil feeder according to claim 4 is characterized in that: described back light portion has the color of yellow system, and the colour system of described diffuser plate should be identical with the colour system of described back light portion, and should have fluorescent characteristic.

6, the display device that is used for oil feeder according to claim 4 is characterized in that: described stationary installation is to connect and spiral is inserted into the screw the foot of described framework from the another side of described printed base plate.