JP5023814B2 - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device with a display panel having a display portion pasted on the front side of a case, which can prevent invasion of water into the display portion from an air vent groove provided in the case. <P>SOLUTION: The display device is provided with a case 5 having a translucent part 4 and a display panel 9 which is pasted on the front side of the case 5 and has a display part provided at a place corresponding to the translucent part 4. A through hole 3 is provided at the front portion 18 of the case 5 corresponding to the space between the translucent part 4 and the edge 23 of the display panel 9, and a gap portion S (recess) is formed around a push button 6 installed in the through hole 3. A first air vent groove 21 which connects the gap portion S and the translucent part 4 and a second air vent groove 22 which connects the gap portion S and the place corresponding to the edge 23 are respectively installed in the case 5, and the depth of the gap portion S is made deeper than that of the first air vent groove 21. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a display device that is mounted on an agricultural machine, a construction machine, a motorcycle, or the like and includes a case body to which a display panel is attached.

There exists patent document 1 as what stuck the display panel to the front side of the case body provided with the operation member, the display part, etc., for example. The operation panel described in Patent Document 1 is provided with an operation hole 31 on the front surface side of the support 3 (case body), and the operation hole 31 is elastic to press the switch 22 housed in the support 3. The member 4 is disposed so as to close the operation hole 31, and the panel sheet 1 (display panel) provided with the display unit 12 on the front side of the support 3 is attached so as to cover the elastic member 4. The support 3 is provided with a ventilation path 33 and a ventilation hole 32 for escaping the expanded air in the sealed space formed between the periphery of the elastic member 4 and the panel sheet 1 to the outside.
JP 2001-101949 A

  However, in order to prevent water from entering the support 3 and adversely affecting it, the structure described in FIG. 1 of Patent Document 1 includes a partition wall 34 that partitions the upper case 3a from the circuit board 2, and a partition. Ventilation holes 32 are formed in the front side portion of the upper case 3a corresponding to the space formed by providing the wall 34, so that air guided from the ventilation path 33 is released from the bottom of the lower case 3b to the outside. Therefore, a space for providing a space (right end in FIG. 1) is required. Accordingly, the case becomes larger and the cost is increased. Further, the structure described in FIG. 3 of Patent Document 1 is provided with a porous film 6 that allows air to pass therethrough but does not allow water to pass therethrough so as to block the vent hole 32. The film 6 is necessary, which increases the cost.

  In order to improve such a point, in Patent Document 1, for example, the vent hole 32 (air escape groove) is extended to the edge of the support body 3 without providing the support body 3 with the ventilation path 33 and expanded. A method of letting air escape to the outside can be considered. However, when the operation panel in Patent Document 1 is exposed to the outside, water may enter the elastic member 4 side through the vent hole 32. At that time, in the case of a display device in which a display unit is provided instead of the elastic member 4 (switch 22) and a panel sheet having a see-through unit corresponding to the display unit is attached, Visibility deteriorates and appearance quality deteriorates.

  The present invention has been made in view of such a point, and in a display device including a display panel provided with a display unit attached to the front surface side of a case body, the display unit is formed from an air escape groove provided in the case body. An object of the present invention is to provide a display device that can prevent water from entering the device.

In order to achieve the above object, the present invention comprises a case body having a translucent portion, and a display panel attached to the front surface side of the case body and provided with a display portion at a location corresponding to the translucent portion. a recess comprising a recess in the casing portion corresponding to between the end of the display panel and the optical part is provided, and the first air escape grooves connecting said light transmitting portion and the recess, the said end and said recess The case body is provided with a second air escape groove connecting the corresponding portions, and the recess is deeper than the first air escape groove.

  In addition, there are a plurality of the light transmitting portions, and the first air escape groove is branched between the concave portion and the plurality of light transmitting portions and connected to the plurality of light transmitting portions.

  In a display device provided with a display panel provided with a display unit affixed to the front side of a case body, a display device capable of preventing water from entering the display portion from an air escape groove provided in the case body is obtained. be able to.

  FIG. 1 is a partial cross-sectional view of the display device showing the first embodiment. FIG. 2 is a partial front view showing a case body used in the display device and equipped with a push button, and FIG. 3 is a partial cross-sectional view of the display panel corresponding to the display unit provided in the display panel.

  The display device includes a hard circuit board 2 to which the switch 1 is fixed by soldering, and a case body 5 that accommodates the circuit board 2 and includes a through hole 3 and a translucent portion 4 that are provided corresponding to the switch 1. A display having a push button 6 attached to the case body 5 so as to close the through hole 3, a pressing portion 7 provided corresponding to the push button 6, and a display portion 8 provided corresponding to the translucent portion 4. Panel 9, double-sided tape 10 as an adhesive member for attaching display panel 9 to case body 5, synthetic resin cover 11 covering the back side of circuit board 2, and translucent part 4 mounted on circuit board 2 A light emitting diode 12 as a light source for illuminating and displaying the display unit 8 and a reflecting member 13 disposed so as to surround the light emitting diode 12 are provided.

  The display panel 9 is provided with, for example, a black non-transparent layer 16 serving as a ground portion 15 by printing on the back side of a colorless and transparent substrate 14 made of synthetic resin, except for two places serving as a display region R. The symbol which is the display part 8 is printed in R with the black impervious layer 16, for example. The printing of the ground portion 15 and the display portion 8 may be provided in the same process. Thereafter, a transparent diffusion layer 17 is provided in the display region R. The pressing portion 7 is formed in a raised shape by embossing, and characters and marks corresponding to the function of the switch 1 are printed on the back side of the substrate 14. Double-sided tape 10 is attached to the back surface of display panel 9, and display panel 9 with double-sided tape 10 attached is attached to the front side of case body 5.

  The double-sided tape 10 is made of a sheet in which an adhesive is provided on both sides of a base material made of a nonwoven fabric, is approximately the same size as the display panel 9 and has a thickness of about 0.2 mm. As shown in FIG. 1, the display panel 9 is not provided at locations corresponding to the light transmitting portion 4 and the pressing portion 7. This double-sided tape 10 is stamped in advance on the portion corresponding to the light transmitting portion 4 and the pressing portion 7 and then pasted on the back surface of the display panel 9, and then the outer shape of the display panel 9 is stamped on the display panel 9 The outer shape of the double-sided tape 10 having the same shape as that of the panel 9 is punched out.

  The case body 5 is made of, for example, black synthetic resin such as ABS or polycarbonate, and has a front surface portion 18 and a peripheral portion 19. Two (a plurality of) translucent portions 4 are formed on the front surface portion 18 corresponding to each display region R of the display panel 9. The translucent portion 4 is made of a translucent synthetic resin (in this embodiment, a colorless and transparent synthetic resin), and is integrally formed with the front surface portion 18, thereby maintaining waterproofness. Moreover, it has the through-hole 3 provided corresponding to the switch 1 (it also respond | corresponds also to the press part 7 of the display panel 9), and the protrusion 20 provided in the periphery.

  The front surface portion 18 of the case body 5 is provided with a first air escape groove 21 that connects the through hole 3 and the translucent portion 4, and a second air escape groove 22 that connects the through hole 3 and the protrusion 20. is there. The first and second air escape grooves 21 and 22 have a groove shape having a width of about 1 mm and a depth of about 0.5 mm, and the second air escape groove 22 corresponds to at least the end 23 of the display panel 9. Shall be provided up to Further, the first air escape groove 21 is branched between the through hole 3 and the translucent part 4 and connected to the two translucent parts 4 (the first air escape groove 21 on the translucent part 4 side). Is two, but the side of the through hole 3 is integrated into one). A mounting boss 24 for mounting and fixing the circuit board 2 is provided on the front surface portion 18, and the circuit board 2 is screwed to the mounting boss 24 with screws 25. A welding boss 26 is provided around the through hole 3.

  The push button 6 is made of a synthetic rubber having elasticity, and includes a shaft portion 27, a fixed leg portion 28 located around the shaft portion 27, and a thin portion 29 that connects the shaft portion 27 and the fixed leg portion 28. ing. The push button 6 is attached to the periphery of the through hole 3 provided in the front surface portion 18 by sandwiching the fixed leg portion 28 between the front surface portion 18 of the case body 5 and the ring-shaped fixing member 30 made of synthetic resin. It is like that. Specifically, the fixing member 30 is welded to the welding boss 26 in a state where the fixing leg portion 28 is slightly compressed, so that the through hole 3 of the case body 5 is closed without a gap so that waterproofness is maintained. become.

  When the push button 6 is attached to the case body 5, a gap S as a recess is formed around the push button 6 (between the push button 6 and the cut hole of the through hole 3). The clearance S, the first air escape groove 21 and the second air escape groove 22 are connected to each other, and the clearance S is in the thickness direction of the front face portion 18 of the first and second air escape grooves 21 and 22. It is deeper than the depth of.

  The reflecting member 13 is made of white synthetic resin, has a partition wall 31 that is inclined from the light emitting diode 12 side to the peripheral side of the light transmitting portion 4, and the light emitting diode 12 is located in a space surrounded by the partition wall 31. It is like. The reflecting member 13 reflects the light from the light emitting diode 12 to efficiently illuminate the light transmitting part 4 and, when there are a plurality of light transmitting parts 4, prevents light from turning to the adjacent light transmitting parts 4. Therefore, it has a light shielding function. Although not shown, the reflecting member 13 is fixed to the circuit board 2.

  The display region R receives light from the light emitting diode 12 that emits red light, for example, which has passed through the translucent portion 4 and is illuminated in red. Then, the display unit 8 is displayed in black in a region that is transmitted and illuminated in a substantially uniform red color by the diffusion layer 17. Note that the black non-transmissive layer 16 may be printed except for the portion to be the display unit 8 so that the display unit 8 is transmitted and illuminated in red.

  The switch 1 is operated by pressing the pressing portion 7 of the display panel 9 downward. By pushing the pressing portion 7, the thin portion 29 of the push button 6 is bent, and the shaft portion 27 moves downward (to the switch 1 side). As a result, the movable portion 32 of the switch 1 held reversibly by the lower end of the shaft portion 27 is pressed, and various display items appear on a liquid crystal display (not shown), from which any item can be selected. Has been. When the pressing operation is stopped, the shaft portion 27 of the push button 6 and the pressing portion 7 of the display panel 9 return to their original positions.

  Air venting between the display panel 9 and the case body 5 is performed as follows. The air that has accumulated and expanded in the space between the display panel 9 and the translucent part 4 of the case body 5 escapes from the first air escape groove 21 to the gap S between the push button 6 and the case body 5, and further. It passes through the second air escape groove 22 and escapes from the end 23 of the display panel 9 to the outside. In addition, the expanded air that has accumulated in the space between the periphery of the push button 6 and the display panel 9 passes through the second air escape groove 22 and escapes from the end 23 of the display panel 9 to the outside.

  When rainwater falls on such a display device, the water that has entered the gap between the end 23 of the display panel 9 and the protrusion 20 passes through the second air escape groove 22 to form the push button 6 and the case body 5. The gap portion S enters (penetrates) the gap portion S and attempts to enter the light-transmitting portion 4 through the first air escape groove 21. The depth of the gap portion S is the depth of the first air escape groove 21. Since it is deeper than this, water that is about to enter the translucent part 4 can be blocked by the gap part S, and the visibility and appearance quality of the display part 8 do not deteriorate.

  Further, the case body 5 is provided with a push button 6 that presses the switch 1, and a display device including the push button 6 (switch 1) is provided by providing a gap S as a recess around the push button 6. However, it is not necessary to form a separate recess, and space saving is achieved. Further, even if there are a plurality of light-transmitting portions 4, the first air escape groove 21 on the side of the gap portion S connected to the gap portion S is consolidated into one, thereby shortening the processing time of the case body 5 and reducing the cost. Is planned.

  FIG. 4 is a partial front view of a case body showing a second embodiment of the present invention, and FIG. 5 is a partial cross-sectional view of the case body. In the first embodiment, the concave portion is formed by providing the gap portion S around the push button 6. However, in the present embodiment, the concave portion is formed by providing the case body 5 with a recess. It is. Therefore, the display device of this embodiment is not provided with a switch (push button). In addition, the same code | symbol is attached | subjected to the same or equivalent part as the said 1st Embodiment, and the detailed description and illustration are abbreviate | omitted.

  Although the display panel 9 is not shown, the display region R, the display portion 8 and the ground portion 15 are provided on a colorless and transparent substrate 14 made of a synthetic resin as in the first embodiment, and the double-sided tape 10 is provided on the back surface. The display panel 9 to which the double-sided tape 10 is attached is attached to the front side of the case body 5. Since the case body 5 is not equipped with a push button, the pressing portion 7 as in the first embodiment is not formed on the display panel 9.

  The case body 5 has a front surface portion 18 and a peripheral portion 19, and two (a plurality of) light transmitting portions 4 are formed on the front surface portion 18 corresponding to each display region R of the display panel 9. . The translucent portion 4 is made of a synthetic resin having translucency, and is integrally formed with the front surface portion 18 so that waterproofness is maintained. Further, for example, a cylindrical recess 33 as a concave portion is provided between the translucent portion 4 and the protrusion 20 provided at the periphery.

  Further, the front surface portion 18 of the case body 5 is provided with a first air escape groove 21 that connects the recess 33 and the translucent portion 4, and a second air escape groove 22 that connects the recess 33 and the protrusion 20. is there. The depth of the recess 33 is deeper than the depths of the first and second air escape grooves 21 and 22. Further, the first air escape groove 21 is branched between the recess 33 and the translucent part 4 and is connected to the two translucent parts 4 (the first air escape groove 21 on the translucent part 4 side is There are two, but the depression 33 side is integrated into one).

  When rainwater falls on the display device configured in this manner, water that has entered the gap between the end 23 of the display panel 9 and the protrusion 20 enters the recess 33 through the second air escape groove 22 (penetration). In addition, although it tries to enter the light transmitting portion 4 through the first air escape groove 21, the depth of the recess 33 is deeper than the depth of the first air escape groove 21. Water that is about to enter the light portion 4 can be blocked by the depression 33, and the visibility and appearance quality of the display portion 8 are not deteriorated. Further, even if there are a plurality of light transmitting portions 4, the processing time of the case body 5 can be shortened and the cost can be reduced by consolidating the first air escape grooves 21 on the depression 33 side into one.

  In each of the above embodiments, the first air escape groove 21 and the second air escape groove 22 have the same depth, and the recesses (gap S, recess 33) have the same depth as the first and second air escape grooves 22. 2, the depth of the concave portion only needs to be deeper than the depth of the first air escape groove 21, and the depth of the second air escape groove 22 is It may be the same as or shallower than the depth of the recess.

  Further, the numbers of the light transmitting portions 4 and the push buttons 6 are arbitrary, and it is not necessary that all the push buttons 6 are connected by the light transmitting portions 4 and the first air escape grooves 21. The translucent part 4 should just be connected with the exterior of the case body 5 through the 1st air escape groove 21, the recessed part, and the 2nd air escape groove 22. FIG. A combination of the first embodiment and the second embodiment may be used.

1 is a partial cross-sectional view of a display device showing a first embodiment of the present invention. The partial front view which shows the case body used for the display apparatus. The fragmentary sectional view of the display panel. The partial front view of the case body which shows 2nd Embodiment of this invention. The fragmentary sectional view of the case body.

Explanation of symbols

4 Translucent part 5 Case body 6 Push button 8 Display part 9 Display panel 21 First air escape groove 22 Second air escape groove 23 End S Clearance (recess)
33 depression (recess)

Claims (2)

A case body having a translucent portion; and a display panel provided on the front side of the case body and provided with a display portion at a location corresponding to the translucent portion, and the translucent portion and an end of the display panel a recess comprising a recess in the casing portion corresponding to the provided between the second air connecting the first air escape grooves connecting said light transmitting portion and the recess, and a position corresponding to said end and said recess An escape groove is provided in each case body, and the recess is deeper than the first air escape groove. The light transmission unit has several, claim wherein the first air escape groove is characterized in that connected to the plurality of light transmitting portions branched between said plurality of light transmitting portions and the recess 1 The display device described in 1.

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