JP2012022094A - Waterproof structure of display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the infiltration of liquid while suppressing a sealing portion so as not to add excessive pressure to display means.SOLUTION: In a display device 10, a sealing portion 50 has a rubber layer 52 stuck to a display unit 40, and a sponge layer 56 provided on a panel 20 side of the rubber layer 52. The sponge layer 56 has stiffness lower than that of the rubber layer 52. By compressing the sponge layer 56 with the rubber layer 52 and the panel 20, comparatively small pressure is applied from the sponge layer 56 to the rubber layer 52 to press the display unit 40. It is suppressed that excessive pressure is added to the display unit 40. Furthermore, the rubber layer 52 has waterproofness, and the sponge layer 56 absorbs liquid and retains water. Therefore, the rubber layer 52 and the sponge layer 56 can prevent the liquid from infiltrating into the display device 10 through between the panel 20 and a touch panel sheet 46.

Description

  The present invention relates to a waterproof structure of a display device.

  In the portable device disclosed in Patent Document 1 below, a waterproof rubber is disposed between the first case and the first switch provided inside the first case. For this reason, even when liquid such as rainwater enters the first case from the mounting hole of the first case, the waterproof rubber prevents the liquid from entering the first switch.

  On the other hand, in a display device having a display means such as a liquid crystal display or a touch panel sheet, the display means is disposed on the back side of the panel having an opening, and the display means is exposed to the front side of the panel through the opening and is externally Visible. Further, by providing a seal member between the panel and the display means, the seal member prevents liquid from entering.

  Here, in the case where a sponge material is used for the seal member, the sponge material has low adhesion, so that it cannot sufficiently prevent liquid from entering, and it is difficult to obtain a high waterproof effect.

  Further, when a rubber material is used for the seal member, the rubber material has high adhesion, but has high rigidity, so that the seal member may apply excessive pressure to the display means.

JP 2009-146670 A

  In view of the above facts, an object of the present invention is to provide a waterproof structure for a display device that can prevent liquid from entering while suppressing an excessive pressure applied to the display means by the seal portion.

  The waterproof structure of the display device according to claim 1, wherein the display is provided with a front side member having an opening and an exposed surface that is disposed on the back side of the front side member and is exposed to the front side of the front side member by the opening. And a waterproof layer provided around the opening and sandwiched between the display means and the front side member and in close contact with the display means to prevent liquid from entering, and the waterproof layer A seal portion provided on the front side member side and having a water absorption layer that is lower in rigidity than the waterproof layer and absorbs the liquid.

  The waterproof structure of the display device according to claim 2 is the waterproof structure of the display device according to claim 1, and includes a peripheral wall portion provided on the front side member and disposed on the opening side of the seal portion. The dimension of the waterproof layer in the vertical direction of the exposed surface is made larger than the dimension of the gap between the peripheral wall portion and the display means in the vertical direction of the exposed surface.

  In the waterproof structure of the display device according to the first aspect, the display means is arranged on the back side of the front side member, and the exposed surface of the display means is exposed to the front side of the front side member by the opening of the front side member. Further, a seal portion is provided around the opening, and is sandwiched between the display means and the front side member.

  Here, the seal portion has a waterproof layer in close contact with the display means and a water absorbing layer provided on the front side member side of the waterproof layer, and the water absorbing layer has lower rigidity than the waterproof layer.

  For this reason, when the water absorbing layer is compressed by the waterproof layer and the front side member, the waterproof layer is pressed by the relatively small pressure from the water absorbing layer to press the display means. Thereby, it can suppress that an excessive pressure is added to a display means.

  Furthermore, the waterproof layer prevents the ingress of liquid. The water absorption layer absorbs liquid.

  For this reason, when a small amount of liquid flows along the surface of the display unit toward the seal portion, the liquid is blocked by the waterproof layer. Thereby, infiltration of the liquid can be prevented by the waterproof layer.

  On the other hand, when a large amount of liquid flows along the surface of the display means toward the seal portion, even if the liquid blocked by the waterproof layer reaches the water absorption layer, the water absorption layer absorbs the liquid and Retain liquid. Thereby, the penetration | invasion of a liquid can be prevented with a waterproof layer and a water absorption layer.

  In the waterproof structure of the display device according to claim 2, the peripheral wall portion is provided on the front side member, and the peripheral wall portion is disposed on the opening side of the seal portion.

  Here, the dimension in the vertical direction of the exposed surface of the waterproof layer is made larger than the dimension in the vertical direction of the exposed surface of the gap between the peripheral wall portion and the display means. For this reason, the peripheral wall portion covers not only the entire opening portion side of the water-absorbing layer but also a part of the waterproof layer on the opening portion side. Thereby, it becomes difficult for the liquid to reach the water absorption layer, and the seal portion can further prevent the liquid from entering.

It is a cross-sectional view (1-1 line sectional view of FIG. 2) of the main part of the display device according to the first embodiment of the present invention. 1 is a front view of a display device according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view (1-1 sectional view taken on the line of FIG. 3) when the display apparatus which concerns on the 1st Embodiment of this invention is attached to the instrument panel of a vehicle. It is a conceptual diagram when the seal part in the display apparatus which concerns on the 1st Embodiment of this invention is compressed between a panel and a touchscreen sheet. It is a conceptual diagram which shows the flow of a small amount of liquid along the touchscreen sheet | seat surface of the display apparatus which concerns on the 1st Embodiment of this invention. It is a conceptual diagram which shows the flow of a lot of liquids along the touch panel sheet | seat surface of the display apparatus which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view (7-7 sectional view taken on the line of FIG. 8) when the display apparatus which concerns on the 2nd Embodiment of this invention is attached to the instrument panel of a vehicle. It is a front view of the display apparatus which concerns on the 2nd Embodiment of this invention. It is a conceptual diagram when the seal part of the modification in the display apparatus which concerns on the 1st Embodiment or 2nd Embodiment of this invention is compressed between a panel and a touch panel sheet | seat.

  [First Embodiment]

  FIG. 1 is a cross-sectional view of a main part of a display device 10 mounted on a vehicle according to a first embodiment of the present invention. FIG. 2 is a front view of the display device 10. Is shown. In the drawings, the front side of the vehicle is indicated by an arrow FR, the right side of the vehicle is indicated by an arrow RH, and the upper side of the vehicle is indicated by an arrow UP.

  As shown in FIG. 3, the display device 10 is disposed on an instrument panel 70 of the vehicle, and the instrument panel 70 is inclined in a direction toward the vehicle rear side as it goes toward the vehicle lower side.

  The display device 10 includes a substantially rectangular parallelepiped cover 12 as an accommodating portion. The cover 12 is disposed in the instrument panel 70 and fastened to the vehicle, and the cover 12 is opened toward the instrument panel 70 side. A substantially rectangular parallelepiped panel 20 as a front member is disposed on the opening side of the cover 12, and the panel 20 is opened toward the cover 12 side and fixed to the cover 12. The surface of the panel 20 is disposed flush with the surface of the instrument panel 70 and is exposed outside the instrument panel 70. For this reason, the display device 10 is attached to the vehicle so as to incline toward the vehicle lower side as it goes to the vehicle front side.

  As shown in FIGS. 1 to 3, a rectangular display hole 22 as an opening is provided through the center of the panel 20, and a peripheral wall 24 is displayed on the cover 12 side of the panel 20. The holes 22 are integrally provided along the circumferential direction. On the cover 12 side of the panel 20, ribs 26 are integrally provided on the outer peripheral side of the peripheral wall portion 24, and the ribs 26 are formed in a rectangular cylindrical shape in parallel with the peripheral wall portion 24. In addition, a cylindrical boss 28 is provided on the cover 12 side of the panel 20 on the outer peripheral side of the rib 26, and the boss 28 is arranged at predetermined intervals along the circumferential direction of the rib 26.

  A current location button 31, a destination button 32, a menu button 33, and an information button 34 as operation units are provided on the vehicle right side of the surface of the panel 20 so as to be capable of being pressed along the vehicle vertical direction.

  A Passenger button 35, an air control button 36, an audio button 37, and an image quality / off button 38 as operation units are provided on the left side of the vehicle on the surface of the panel 20 so as to be pressable in the vertical direction of the vehicle.

  A display unit 40 as display means (operation means) is disposed on the back side of the panel 20.

  The display unit 40 includes a bracket 42. The bracket 42 is made of a plate-like metal and is bent into a substantially rectangular parallelepiped box shape. The bracket 42 is opened toward the panel 20 side, and the opening side peripheral portion of the bracket 42 is bent perpendicularly to the side surface of the bracket 42 and fastened to the boss 28 of the panel 20 with a screw. The display unit 40 is fixed to the panel 20.

  The display unit 40 includes a liquid crystal display 44, and the liquid crystal display 44 is disposed in a bracket 42 with the display surface 45 on the surface of the liquid crystal display 44 facing the panel 20. The display surface 45 of the liquid crystal display 44 can display information such as a map (image).

  The display unit 40 includes a transparent touch panel sheet 46, and the touch panel sheet 46 is disposed on the display surface 45 side of the liquid crystal display 44 with the operation surface 47 as an exposed surface of the touch panel sheet 46 on the panel 20 side. . For this reason, the operation surface 47 is exposed from the display hole 22 of the panel 20, and information displayed on the display surface 45 is made visible through the touch panel sheet 46, and the touch panel sheet 46 is made touch-operable. Yes. The touch panel sheet 46 is disposed with a certain gap in the direction perpendicular to the operation surface 47 of the touch panel sheet 46 with respect to the peripheral wall portion 24 of the panel 20. The touch panel sheet 46 is disposed with a certain gap in the direction perpendicular to the operation surface 47 of the touch panel sheet 46 with respect to the back surface 21 of the panel 20 on the cover 12 side.

  A seal portion 50 having a rectangular cross section is disposed between the peripheral wall portion 24 of the panel 20 and the rib 26. The seal portion 50 is formed in a rectangular cylindrical shape along the circumferential direction of the peripheral wall portion 24 and is sandwiched between the panel 20 and the touch panel sheet 46 (display unit 40).

  The seal portion 50 includes a rubber layer 52 as a waterproof layer, and the rubber layer 52 is disposed on the touch panel sheet 46 side. The rubber layer 52 is made of, for example, an elastic and waterproof synthetic rubber such as EPDM rubber (ethylene propylene rubber), CR rubber (chloroprene rubber), NBR rubber (nitrile rubber), or the like.

  The seal unit 50 includes an adhesive layer 54, and the adhesive layer 54 is disposed on the panel 20 side of the rubber layer 52. The adhesive layer 54 is made of a waterproof adhesive tape or the like, and adheres the rubber layer 52 and the sponge layer 56. Further, the adhesive layer 54 is adhered to the rubber layer 52, thereby preventing liquid from entering between the adhesive layer 54 and the rubber layer 52.

  The seal portion 50 includes a sponge layer 56 as a water absorption layer, and the sponge layer 56 is disposed on the panel 20 side of the adhesive layer 54. The sponge layer 56 is made of a material having lower rigidity (higher shrinkage) than the rubber layer 52, and has a structure having many fine holes inside. When a liquid such as water comes into contact with the sponge layer 56, the liquid enters the holes in the sponge layer 56 and the air in the holes is replaced with the liquid, so that the liquid is absorbed by the sponge layer 56. . For this reason, the sponge layer 56 retains the liquid.

  As shown in FIG. 4, before the seal portion 50 is attached between the panel 20 and the touch panel sheet 46, the dimension in the stacking direction of the seal portion 50 is the vertical direction of the operation surface 47 of the gap between the panel 20 and the touch panel sheet 46. It is larger than the dimensions.

  When the seal portion 50 is attached between the panel 20 and the touch panel sheet 46, the sponge layer 56 is pressed by the panel 20 and the rubber layer 52 because the rigidity of the sponge layer 56 is lower than that of the rubber layer 52. And compressed.

  When the sponge layer 56 is compressed, pressure is applied to the rubber layer 52 from the sponge layer 56, and the rubber layer 52 presses the touch panel sheet 46 by the pressure. For this reason, the contact surface of the rubber layer 52 with the touch panel sheet 46 follows the shape of the surface of the touch panel sheet 46 and is in close contact with the touch panel sheet 46. This prevents liquid from entering between the rubber layer 52 and the touch panel sheet 46. At this time, the thickness of the rubber layer 52 in the stacking direction of the seal portion 50 is not substantially changed.

  Further, the dimension of the rubber layer 52 in the vertical direction of the operation surface 47 (the thickness in the stacking direction of the seal portion 50) is the same as that in the vertical direction of the operation surface 47 of the gap between the peripheral wall portion 24 of the panel 20 and the display unit 40 (touch panel sheet 46). It is larger than the dimensions. Therefore, the peripheral wall 24 covers a part of the rubber layer 52 on the display hole 22 side.

  On the other hand, as shown in FIG. 3, a substrate 60 is disposed on the cover 12 side of the display unit 40, and the substrate 60 is fixed to the cover 12, and a current location button 31, destination button 32, menu button 33, The information button 34, the Passenger button 35, the air control button 36, the audio button 37, the image quality / off button 38, the liquid crystal display 44 and the touch panel sheet 46 are electrically connected. The substrate 60 is a touch operation of the touch panel sheet 46 and each button of a present location button 31, a destination button 32, a menu button 33, an information button 34, a passenger button 35, an air control button 36, an audio button 37, and an image quality / off button 38. The display on the liquid crystal display 44 is controlled according to the operation.

  Next, the operation of the present embodiment will be described.

  The display device 10 is attached to the vehicle with the panel 20 exposed from the instrument panel 70 of the vehicle. For this reason, for example, an occupant may accidentally apply a liquid such as drinking water to the panel 20. When the panel 20 is applied with a liquid, the touch panel sheet 46 of the display device 10 is exposed to the outside of the instrument panel 70 through the display hole 22 of the panel 20.

  As shown in FIG. 5, when the liquid is applied to the touch panel sheet 46 and flows to the seal portion 50 side along the surface of the touch panel sheet 46, the liquid is interposed between the touch panel sheet 46 and the peripheral wall portion 24. First, the rubber layer 52 and the adhesive layer 54 are reached (see arrows in FIG. 5).

  Here, since the rubber layer 52 and the adhesive layer 54 of the seal portion 50 are waterproof, liquid intrusion is prevented. For this reason, the liquid that has reached the rubber layer 52 and the adhesive layer 54 does not enter the rubber layer 52 and the adhesive layer 54.

  Further, since the adhesive layer 54 is bonded to the rubber layer 52, it is possible to prevent liquid from entering between the adhesive layer 54 and the rubber layer 52, and thus the liquid that has reached the rubber layer 52 and the adhesive layer 54. Is not penetrated between the rubber layer 52 and the adhesive layer 54.

Furthermore, the contact surface of the rubber layer 52 with the touch panel sheet 46 is in close contact with the touch panel sheet 46 by the seal portion 50 being sandwiched between the panel 20 and the touch panel sheet 46 (display unit 40). For this reason, the liquid that has reached the rubber layer 52 does not enter between the rubber layer 52 and the touch panel sheet 46.

Therefore, when a small amount of liquid flows to the seal portion 50 side, the liquid does not reach the sponge layer 56 but is blocked by the rubber layer 52 and the adhesive layer 54. Accordingly, the rubber layer 52 and the adhesive layer 54 can prevent the liquid from entering between the panel 20 and the touch panel sheet 46 and entering the display device 10.

  On the other hand, as shown in FIG. 6, when a large amount of liquid flows to the seal portion 50 side, the liquid blocked by the rubber layer 52 and the adhesive layer 54 is removed from the seal portion 50 (rubber layer 52 and adhesive layer 54). ) And the peripheral wall portion 24 to reach the sponge layer 56 (see the arrow in FIG. 6).

  When the liquid reaches the sponge layer 56 of the seal portion 50, the liquid enters a hole in the sponge layer 56. For this reason, when the air in the hole of the sponge layer 56 is replaced with a liquid, the sponge layer 56 absorbs the liquid and retains the liquid.

  As a result, when a large amount of liquid has flowed to the seal portion 50 side, the rubber layer 52, the adhesive layer 54, the liquid entering the inside of the display device 10 across between the panel 20 and the touch panel sheet 46, And the sponge layer 56 can prevent this.

  Further, the size of the rubber layer 52 in the vertical direction of the operation surface 47 is made larger than the size of the gap between the peripheral wall portion 24 and the panel 20 in the vertical direction of the operation surface 47. For this reason, the peripheral wall portion 24 covers not only the entire sponge layer 56 on the display hole 22 side but also a part of the rubber layer 52 on the display hole 22 side. As a result, the liquid that has flowed to the seal portion 50 side is less likely to reach the sponge layer 56, and the liquid can be further prevented from entering the display device 10 across between the panel 20 and the touch panel sheet 46.

  Further, the rigidity of the sponge layer 56 is set lower than that of the rubber layer 52.

  For this reason, when the seal part 50 is attached between the panel 20 and the touch panel sheet 46, the sponge layer 56 is pressed and compressed by the panel 20 and the rubber layer 52 with a relatively small pressure. When the sponge layer 56 is compressed, a relatively small pressure is applied from the sponge layer 56 to the rubber layer 52, and the rubber layer 52 presses the display unit 40 by the pressure. Thereby, it can suppress that an excessive pressure is added to the liquid crystal display 44 (display unit 40).

  Further, the seal portion 50 is composed of a rubber layer 52, an adhesive layer 54, and a sponge layer 56, and is sandwiched between the display unit 40 and the panel 20. Therefore, the liquid can be prevented from entering the display device 10 with an inexpensive configuration, and the reliability of the display device 10 can be improved.

  [Second Embodiment]

  FIG. 7 shows a vertical cross-sectional view of a display device 100 according to the second embodiment of the present invention, and FIG. 8 shows a front view of the display device 100. In the drawings, the front side of the vehicle is indicated by an arrow FR, the right side of the vehicle is indicated by an arrow RH, and the upper side of the vehicle is indicated by an arrow UP.

  The display device 100 according to the present embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points.

  As shown in FIGS. 7 and 8, the sponge layer 56 of the seal portion 50 is formed with a plurality of continuous convex portions 157 having a triangular cross section on the outer peripheral surface on the lower side of the vehicle. Projected to the side.

  A drainage groove 121 having a substantially semicircular cross section is provided along the vehicle front-rear direction on the inner peripheral side of the vehicle lower wall of the panel 20 so as to correspond to the convex portion 157 of the sponge layer 56. Is disposed below the top of the convex portion 157.

  A discharge groove 112 having a semicircular cross section is provided on the inner peripheral side of the vehicle lower side wall of the cover 12 along the vehicle front-rear direction. The discharge groove 112 is connected to the drainage groove 121 at a portion where the cover 12 is connected to the panel 20. Further, a discharge hole 114 is provided through the vehicle front side wall of the cover 12, and the discharge hole 114 communicates with the discharge groove 112.

  Since the display device 100 is attached to the vehicle so as to be inclined toward the vehicle lower side as it goes toward the vehicle front side, the drain groove 121 and the discharge groove 112 are directed toward the vehicle lower side toward the vehicle front side. Inclined.

  Here, also in this embodiment, the same operational effects as those of the first embodiment can be obtained.

  Further, the sponge layer 56 of the seal portion 50 is provided with a convex portion 157. For this reason, the liquid absorbed by the sponge layer 56 flows into the drainage groove 121 from the top of the projection 157 and flows along the drainage groove 121 and the discharge groove 112 to the discharge hole 114 side. 114 is discharged out of the display device 100.

  Thus, by providing the convex portion 157 of the sponge layer 56, the drainage groove 121, the discharge groove 112, and the discharge hole 114, the liquid absorbed by the sponge layer 56 can be drained out of the display device 100 at low cost and efficiently. The reliability of the display device 100 can be improved.

(Modification)

  As shown in FIG. 9, in this modification, the seal portion 50 is formed only of the rubber layer 52 (the adhesive layer 54 and the sponge layer 56 are not provided). Further, a rib 151 having a triangular cross section is integrally formed along the circumferential direction on the surface of the rubber layer 52 on the panel 20 side.

  Since the width of the rib 151 (the length in the direction perpendicular to the circumferential direction of the seal portion 50) is narrower than the width of the rubber layer 52, the deformation resistance load of the rib 151 in the stacking direction of the seal portion 50 is It becomes lower than the deformation resistance load on the surface on the touch panel sheet 46 side. For this reason, when the seal portion 50 is sandwiched between the panel 20 and the touch panel sheet 46, the apex portion of the rib 151 is deformed with a relatively small deformation load, and the rubber layer 52 has the deformation load. Is pressed against the touch panel sheet 46. Accordingly, the seal unit 50 can prevent the liquid from entering the display device 10 beyond the display unit 40 and the panel 20 while suppressing the seal unit 50 from applying an excessive pressure to the display unit 40.

  In this modification, ribs 151 having a triangular cross section are provided on the panel 20 side of the seal portion 50, but the shape and number of the ribs 151 can be arbitrarily set.

  Furthermore, in the first embodiment and the second embodiment, the hardness of the rubber layer 52 and the sponge layer 56 is not particularly limited. Therefore, the rubber layer 52 is pressed against the display unit 40 with an appropriate pressure by changing the hardness of the rubber layer 52 and the sponge layer 56 according to the thickness of each of the rubber layer 52 and the sponge layer 56. Can do.

  In the second embodiment, the discharge hole 114 is provided in the vehicle front side wall of the cover 12. Instead, the discharge hole 114 may be provided in the vehicle lower side wall of the panel 20. In this case, it is not necessary to provide the discharge groove 112 in the cover 12.

10 Display device 20 Panel (front side member)
22 Display hole (opening)
40 Display unit (display means)
47 Operation surface (exposed surface)
50 Sealing part 52 Rubber layer (waterproof layer)
56 Sponge layer (water absorption layer)
100 Display device

Claims (2)

A front member having an opening;
Display means disposed on the back side of the front side member and provided with an exposed surface exposed to the front side of the front side member by the opening;
A waterproof layer provided around the opening and sandwiched between the display means and the front side member and in close contact with the display means to prevent liquid from entering, and the front side member side of the waterproof layer A water-absorbing layer that has a lower rigidity than the waterproof layer and absorbs the liquid,
The waterproof structure of the display device provided with. Provided on the front side member, comprising a peripheral wall portion disposed on the opening side of the seal portion,
The waterproof structure for a display device according to claim 1, wherein a dimension of the waterproof layer in the vertical direction of the exposed surface is larger than a dimension of the gap between the peripheral wall portion and the display means in the vertical direction of the exposed surface.

Images