JP3835644B2 - LCD display - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an LCD display as a display unit of a digital liquid crystal display meter.
[0002]
[Prior art]
This type of LCD display is used as a display unit for digital liquid crystal display meters such as speedometers, tachometers, fuel meters, distance meters, clocks, various alarms, etc. for automobiles, motorcycles, various water vehicles, etc. It was constructed as shown in 4.
[0003]
That is, FIG. 4 is a cross-sectional view showing a configuration of a conventional LCD display 101. The LCD display 101 has a resin plate 103 on a PCB (electronic substrate) 102, and EL (electroluminescence) as back lighting for nighttime. 104, LCD (liquid crystal display element) 105, and a rubber connector 106 for connecting the LCD 105 and the PCB 102 are stacked and integrated with a holder 107. Conventionally, a sponge is provided between the EL 104 and the plate 103. A configuration has been adopted in which variations in the thickness of the EL 104 are absorbed by elastic deformation of the sponge plate 108 via the plate 108.
[0004]
[Problems to be solved by the invention]
However, the conventional LCD display 101 is provided with the sponge plate 108 for absorbing the variation in the thickness of the EL 104, so that it takes time to assemble and increases the number of parts, resulting in an increase in cost. It was.
[0005]
The present invention has been made in view of the above problems, and an object thereof is to provide an LCD display capable of improving assemblability, reducing the number of parts, and reducing the costs associated therewith.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in an LCD display configured by sequentially stacking a plate, an EL, and an LCD on a PCB and fastening and integrating them with a holder, the EL is pressed against the LCD against the plate. A plurality of elastic arms are integrally cut and raised, and in a plan view of the LCD display, the protruding directions of some of the elastic arms and the other elastic arms are opposite to each other. In addition, the elastic arms of the part and the other part are spaced apart from each other in a direction opposite to the protruding direction .
[0007]
Therefore, according to the present invention, the elastic deformation of the elastic arm integrally formed on the plate itself absorbs the variation in the thickness of the EL, and the EL is pressed against the LCD by the elastic force of the elastic arm to be brought into close contact therewith. As a result, the sponge plate that has been necessary in the past can be eliminated, the number of parts can be reduced and the cost can be reduced, and the assembling property can be improved and the assembling time can be shortened.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0009]
FIG. 1 is a sectional view showing a configuration of an LCD display according to the present invention, FIG. 2 is an exploded perspective view of the LCD display, and FIG. 3 is a sectional view of a digital liquid crystal display meter incorporating the LCD display.
[0010]
A digital liquid crystal display meter 10 shown in FIG. 3 is used, for example, as a speedometer for a motorcycle, and is configured by housing the LCD display 1 according to the present invention in an upper case 11 and a lower case 12 which are divided into two parts in the vertical direction. The lead wire 13 led out from the back surface (lower surface) of the LCD display 1 passes through the lower case 12 and extends to the outside thereof, and a coupler 14 is attached to the end thereof. A lens 15 is fitted on the upper surface of the upper case 11.
[0011]
By the way, if an attempt is made to provide the functions of a speedometer, a tachometer, a water temperature gauge, a fuel gauge, and a clock to a pointer type analog meter, for example, five movements are required and the meter becomes large. Since the display meter 10 can display information such as speed, number of revolutions, water temperature, remaining amount of fuel, time, etc. on a single LCD display 1, it can be reduced in size and weight. The digital liquid crystal display meter 10 also displays information that cannot be displayed by a pointer-type analog meter, such as displaying fuel consumption by fuel consumption and travel distance, or displaying average speed by travel distance and time, etc. It has the advantage that it can be done.
[0012]
Here, details of the configuration of the LCD display 1 according to the present invention will be described with reference to FIGS.
[0013]
Similarly to the conventional display shown in FIG. 4, the LCD display 1 according to the present invention has a resin plate 3 on a PCB (electronic substrate) 2, an EL 4 and a LCD (liquid crystal display element) 5 as back illumination for nighttime, and The rubber connectors 6 for connecting the LCD 5 and the PCB 2 are stacked and integrated by fastening them with a holder 7. The LCD display 1 according to the present invention is a sponge plate 108 (see FIG. 4) that has been conventionally required. The point which omitted is different from the conventional one.
[0014]
That is, as shown in FIG. 2, in the LCD display 1 according to the present invention, the plate 3 is integrally formed in a rectangular box shape whose bottom surface is open, and the base end portion is centered on both the left and right sides of the top surface. The cut-and-raised elastic arms 3a that are elastically deformable in the vertical direction are integrally formed in three rows. Each elastic arm 3a is formed in a rectangular leaf spring shape that is long in the left-right direction (long side direction) of the plate 3, and elastic plates 3a on the left and right sides arranged side by side in three rows in the front-rear direction (short side direction). Are arranged such that their free ends (portions that elastically support EL4) are alternately outward / inward / outward in the left-right direction. That is, the free ends of the elastic arms 3a on both sides in the front-rear direction are outward and the free ends of the central elastic arm 3a are inward.
[0015]
The holder 7 is press-molded into a reverse channel shape by sheet metal, and a rectangular opening 7a is formed at the center of the upper surface so that the LCD 5 faces. And, on the lower side of each side wall 7b on the long side of the holder 7, three L-shaped locking pieces 7c (key shape) are integrally projected at appropriate intervals.
[0016]
On the other hand, three rectangular holes 2a are formed at appropriate intervals along the long side at positions corresponding to the locking pieces 7c of the holder 7 on both sides of the PCB 2 in the front-rear direction.
[0017]
Here, the sum (h ₁ + h ₂ + h ₃ ) of the thickness h ₁ of the LCD ₅ and the thickness h _{2 of the} EL ₄ and the thickness of the plate 3 (height dimension from the bottom surface to the top of the elastic arm 3 a) h ₃ is a set of the holder 7. The height (h ₁ + h ₂ + h ₃ > H) is set to be greater than the attached height (height dimension of the side wall 7b).
[0018]
Thus, the LCD display 1 according to the present invention is assembled in the following manner.
[0019]
That is, the plate 3, the EL 4 and the LCD 5 are sequentially stacked on the PCB 2 in this order, the rubber connector 6 is mounted, the holder 7 is covered so as to cover them from above, and the locking pieces 7c of the holder 7 are formed on the PCB 2. Pass through each rectangular hole 2a. Then, EL 4 and LCD 5 are elastically supported by a plurality of elastic arms 3 a formed integrally with plate 3. At this time, as described above, the sum (h ₁ + h ₂ + h ₃ ) of the thickness h ₁ of the LCD ₅ and the thickness h _{2 of the} EL ₄ and the thickness h ₃ of the plate 3 is larger than the assembly height H of the holder 7 (h ₁ Since + h ₂ + h ₃ > H) is set, when the holder 7 is pressed against the PCB 2, when the elastic arms 3 a of the plate 3 are elastically deformed by (h ₁ + h ₂ + h ₃ ) −H, the holder 7 is locked. The entire bent portion 7c-1 of the piece 7c protrudes downward from the bottom surface of the PCB2. Therefore, when the bent portion 7c-1 of the locking piece 7c is bent inward at a substantially right angle, the PCB 2, the plate 3, the EL 4, the LCD 5 and the rubber connector 6 are fastened and integrated by the holder 7 as shown in FIG. The LCD display 1 is assembled.
[0020]
By the way, in the LCD display 1 in the assembled state, variations in the thickness h ₂ of EL 4 and other various dimensional errors are absorbed by the elastic deformation of the elastic arm 3 a formed integrally with the plate 3 and the elastic arm 3 a. Since the EL4 can be pressed and brought into close contact with the LCD 5 by the elastic force, the sponge plate (refer to FIG. 4) 108 which has been necessary in the past is not necessary, and the number of parts can be reduced and the cost can be reduced. Assembling performance can be improved and assembly time can be shortened.
[0021]
Thus, the digital liquid crystal display meter 10 is constructed by housing the LCD display 1 assembled as described above in the upper case 11 and the lower case 12 as shown in FIG. Is used, for example, as a speedometer for motorcycles.
[0022]
In the present embodiment, the elastic arm 3a is formed on the upper surface of the plate 3. However, the same effect as described above can be obtained even if the same elastic plate is integrally formed on the lower surface of the plate 3 upside down. Needless to say.
[0023]
【The invention's effect】
As is apparent from the above description, according to the present invention, in an LCD display configured by sequentially stacking a plate, an EL, and an LCD on a PCB and fastening them together with a holder, the EL is placed on the plate. A plurality of elastic arms for pressing against the LCD are integrally cut and raised , and each projection direction of one of the elastic arms and the other elastic arm in a plan view of the LCD display. Since the elastic arms of the part and the other part are spaced apart from each other in a direction opposite to each other and in a direction opposite to the protruding direction, the thickness of the EL is increased by elastic deformation of the elastic arms integrally formed on the plate. In addition, the EL device can be pressed and brought into close contact with the LCD by the elastic force of the elastic arm. Together can be reduced and the cost of parts becomes, there is an advantage that it is possible to shorten the assembly time by improving the assembling efficiency.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of an LCD display according to the present invention.
FIG. 2 is an exploded perspective view of an LCD display according to the present invention.
FIG. 3 is a cross-sectional view of a digital liquid crystal display meter incorporating an LCD display according to the present invention.
FIG. 4 is a cross-sectional view showing a configuration of a conventional LCD display.
[Explanation of symbols]
1 LCD display 2 PCB
3 Plate 3a Elastic arm 4 EL
5 LCD
6 Rubber connector 7 Holder 10 Digital LCD meter

Claims (1)

In an LCD display configured by stacking plates, EL and LCD in order on a PCB and fastening them together with a holder,
The EL forming a plurality resilient arms for pressing the shaped cut and raised integrally on the LCD to the plate, in a plan view of the LCD display, the portion of the resilient arm and the other portion of said each resilient arm An LCD display characterized in that the protruding directions with respect to the elastic arms are opposite to each other, and the elastic arms of the part and the other part are spaced apart from each other in the direction opposite to the protruding direction .

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