JP2009126311A - On-vehicle display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle display device sufficiently and efficiently cooling a heating unit of a display body by a cooling fan having flexibility of the installation position. <P>SOLUTION: An air vent 62 is formed in a display case 12 which stores a display body 10 therein and is turnable around one axis. A cooling fan 64 which feeds cooling air into the display case 12 through the air vent 62 is installed outside the display case 12. An air passage 74 for guiding the cooling air fed into the display case 12 to a heating unit 60 of the display body 10 is provided inside the display case 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted display device, and more particularly to an improved structure of a vehicle-mounted display device that is mounted on an instrument panel or the like for a vehicle such as an automobile.

  In recent years, so-called in-vehicle display devices such as liquid crystal display devices such as monitors for televisions and car navigation systems have been mounted on vehicles, particularly automobiles, in order to satisfy demands for upgrading and improving convenience. It ’s getting more.

  As a kind of in-vehicle display device, a display case in which a display main body having a monitor screen is housed is supported so as to be rotatable about one axis with respect to a support member attached to the vehicle. It is known that the display body is configured to stand up or lie down by rotating the display case around one axis with the support member attached to an instrument panel or the like of the automobile. (For example, refer to Patent Document 1 below).

  In the in-vehicle display device having such a structure, for example, the attachment member is attached in a state of being accommodated in a recess provided in the instrument panel, so that the display main body stands on the instrument panel during use. When the monitor screen is visible, the display main body can be laid down and stored in the recess of the instrument panel when not in use. Thus, it is devised so that the display body does not get in the way when not in use.

  By the way, in the in-vehicle display device in which the display main body can be rotated, a small display case is usually employed in order to reduce the size of the entire device, and between the inner surface of the display case and the display main body. The gap is inevitably reduced. Therefore, the heat generated by the heating element of the display main body is trapped in the narrow space between the inner surface of the display case and the display main body, which may adversely affect the electronic components inside the display main body. was there.

  In view of this, some conventional rotating in-vehicle display devices include a cooling fan that blows cooling air for cooling a heat generating portion of the display main body. However, the entire display body is heated by the heat from the heat generating portion. Therefore, in a display device in which a cooling fan is provided in such a display body, the heated air in the display body is blown to the heat generating part by the cooling fan, and therefore sufficient cooling performance is achieved. It was difficult to get.

  It is also conceivable that the cooling fan is installed at a position where the cooling air can be blown toward the heat generating portion of the display body in the gap between the inner surface of the display case and the display body. However, as described above, in the in-vehicle display device, the gap between the inner surface of the display case and the display body is made as small as possible in order to reduce the size and size of the entire device. Therefore, it was not easy to install the cooling fan at a desired position in such a gap, and even if the cooling fan could be installed at the desired position, as described above, In such a gap, heat from the heat generating part is trapped, so that sufficient cooling performance is not necessarily obtained.

JP-A-8-11639

  Here, the present invention has been made in the background as described above, and the problem to be solved is that the display case that houses the display main body is rotated about one axis by the support member. In an in-vehicle display device that can be supported, there is a high degree of freedom in the installation position of the cooling fan that blows cooling air to the heat generating part of the display body, and more excellent cooling performance is demonstrated with such a cooling fan. The object is to provide an improved structure.

  In the present invention, in order to solve such a problem, the gist of the present invention is that the display main body, the display case that houses the display main body, and the display case can be rotated about one axis. And a support member attached to the vehicle.In the vehicle-mounted display device configured to stand up or lie down by turning about one axis of the display case, the display case includes: A ventilation fan is provided to communicate the inside and outside of the display case, and a cooling fan that blows cooling air into the display case is installed outside the display case through the ventilation hole. An air passage for guiding cooling air to the heat generating part of the display main body; In-vehicle display device, characterized in that provided inside the over scan.

  In addition, according to one of the preferable aspects of the vehicle-mounted display device according to the present invention, the cooling fan is attached to the outer surface of the display case.

  That is, in the in-vehicle display device according to the present invention, since the cooling fan is installed outside the display case, the cooling fan uses the outside air not heated by the heat of the heat generating part of the display body as cooling air. Thus, the air can be sent into the display case through the ventilation hole provided in the display case, and the outside air sent into the display case can be directly blown to the heat generating part through the air passage provided in the display case.

  Further, in the device according to the present invention, since the cooling fan is not limited in the installation space or is installed outside the gentle display case, for example, in the display case, the inner surface and the display main body The range of selection of the installation position of the cooling fan can be sufficiently expanded as compared with the case where the cooling fan is installed in a narrow gap. In addition, by appropriately changing the formation position of the vent holes and the form of the air passage in the display case, the range of selection of the installation position of the cooling fan outside the display case can be further expanded.

  Therefore, in such an in-vehicle display device according to the present invention, the degree of freedom of the installation position of the cooling fan can be advantageously increased, and the cooling performance with respect to the heat generating part of the display body can be further increased with such a cooling fan. It can be increased more effectively. As a result, the adverse effects of heat on the electronic components inside the display body are advantageously reduced or eliminated without incurring any increase in size or complexity of the structure associated with the installation of the cooling fan. A stable operating state and sufficient durability for use can be ensured very effectively.

  Hereinafter, in order to clarify the present invention more specifically, the configuration of an in-vehicle display device according to the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 to FIG. 3 show two types of longitudinal sections in which a display device attached to an instrument panel of an automobile is different from the front form and cutting direction as an embodiment of an in-vehicle display device having a structure according to the present invention. Each of the surface forms is schematically shown. As is clear from these figures, the display device of the present embodiment includes a display case 12 having a known structure with a monitor screen and housing a horizontally long display main body 10 therein, and an automobile instrument. And a housing 14 as a support member attached to a panel (not shown).

  More specifically, the display case 12 includes a case body 16 that has a rectangular frame shape or a substantially rectangular tube shape with a low height, and a window portion 18 that includes an opening on one axial side of the case body 16. The resin molded product includes a lid 20 that covers the opening of the case body 16 on the side opposite to the window 18. Further, an inner flange that protrudes at a predetermined height in a direction perpendicular to the axial direction of the case main body 16 and extends continuously in the circumferential direction on the inner peripheral surface of the end portion on the window 18 side of the case main body 16 in the display case 12. The part 22 is integrally formed with a rectangular frame shape. Further, the lid 20 has an inclined plate shape, and the outer surface thereof is a design surface 21. And in such a display case 12, the display body 10 having a rectangular shape as a whole is placed in a receiving position so as to expose the monitor screen to the outside through the window portion 18 while closing the window portion 18. In the state, it is fixed to the inner flange portion 22.

  In the display case 12, the longitudinal direction of the display main body 10 is sandwiched between the four rectangular side walls of the frame-shaped or rectangular tube-shaped case main body 16 with the horizontally long display main body 10 interposed therebetween (see FIG. 2 and the side wall portions facing each other in the left-right direction of FIG. 3 and the direction perpendicular to the paper surface of FIG. 2 are respectively left side wall portions 23 (located on the left side toward the monitor screen of the display main body 10). And the right side wall portion 24 (located on the right side of the monitor body 10 on the monitor screen). Further, of the remaining two side wall portions facing each other in the short direction of the display main body 10 (the direction perpendicular to the paper surface in FIGS. 1 and 3 and the left-right direction in FIG. 2), the display case 12 as will be described later. The side wall portion positioned on the upper side in the standing state is the ceiling wall portion 25, while the side wall portion positioned on the lower side is the bottom wall portion 26.

  And the width direction (FIG. 1 thru | or FIG. 1 thru | or FIG. 1 thru | or FIG. 1 thru | or the one end side part of the length direction (the direction perpendicular | vertical to the paper surface of FIG. A left rotation shaft 28 and a right rotation shaft 30 that protrude at a predetermined height outward in the opposing direction of the side wall portions 23 and 24 are integrally formed at the central portion in the vertical direction in FIG. .

  The left and right rotating shafts 28 and 30 are formed of cylindrical bodies having the same size and height, and are coaxially positioned on the outer surfaces of the left and right wall portions 23 and 24. Thereby, the internal space of the display case main body 12 is communicated with the outside through the inner holes of the left and right rotation shafts 28 and 30. A driven gear 32 made of a spur gear is externally attached and fixed to the left rotation shaft 28 on the base side, and although not shown, through the inner hole of the right rotation shaft 30, A harness extending from the display main body 10 is led out of the display case 12.

  On the other hand, the housing 14 has a horizontally long bottom wall 34 and a first side wall 36 and a second side wall 34 standing on the bottom wall 34 in a state of being opposed to each other in the longitudinal direction of the bottom wall 34. It has the side wall part 38, the 3rd side wall part 40 and the 4th side wall part 42 which were standingly arranged by the bottom wall part 34 in the state mutually opposed in the transversal direction of the bottom wall part 34, As a whole The resin molded product has a rectangular housing shape that opens upward. The third side wall portion 40 of the housing 14 has a width that reaches the vicinity of the first and second side wall portions 36 and 38 and a depth that reaches the vicinity of the bottom wall portion 34 at the substantially central portion of the upper side. A cutout portion 44 is formed by cutting out the gap.

  Further, the housing 14 has bolt holes 46 at both end portions in the length direction at the lower end portions of the surfaces opposite to the opposing surfaces of the first side wall portion 36 and the second side wall portion 38. A mounting plate portion 48 is provided so as to protrude. A mounting bolt (not shown) inserted through each bolt hole 46 is fixed to an instrument panel (not shown), so that the housing 14 is fixedly attached to the instrument panel. Yes.

  Furthermore, one circular through hole 50 is formed in each central part of the first side wall part 36 and the second side wall part 38 so as to be positioned coaxially. Further, on the opposing surfaces of the first and second side wall portions 36 and 38, a first support portion 52 and a second support portion 54 projecting inward in the opposing direction surround each through hole 50. Thus, they are integrally formed coaxially so as to extend in the circumferential direction.

  The first and second support parts 52 and 54 have inner diameters slightly larger than the outer diameters of the left and right rotation shafts 28 and 30 formed integrally with the left and right wall parts 23 and 24 of the display case 12, respectively. Each of the rotary shafts 28 and 30 is made of a cylindrical body having a height smaller than the height of each of the rotary shafts 28 and 30, and the respective inner holes communicate with the outside of the housing 14 through the through holes 50.

  In this case, in the housing 14, the display case 12 is positioned so that substantially half of the left and right rotation shafts 28 and 30 are formed in the length direction of the left and right wall portions 23 and 24. Contained. Further, under such a state, the first support portion 52 and the second support portion 54 of the housing 14 are fitted on the left rotation shaft 28 and the right rotation shaft 30, respectively. The left rotation shaft 28 and the right rotation shaft 30 are rotatably supported by the first support portion 52 and the second support portion 54.

  As a result, the display case 12 is assembled to the housing 14 so as to be rotatable or rotatable about one axis around the left and right rotation axes 28 and 30. Further, the internal space of the display case 12 is communicated with the outside of the housing 14 through the inner holes of the left and right rotating shafts 28 and 30, the first and second support portions 52 and 54, and the through holes 50. . Further, although not shown, the harness inserted through the inner hole of the right rotation shaft 30 is led out of the display case 12 through the inner hole of the second support portion 54.

  Further, under such an assembly state of the display case 12 to the housing 14, a driven gear 32 that is extrapolated and fixed to the left rotation shaft 28 that is rotatably supported by the first support portion 52 is provided in the housing. 14 is meshed with a drive gear 58 which is fixed on the bottom wall portion 34 in 14 and attached to the drive shaft of a stepping motor 56 which can rotate forward and backward. 1 and 2, when the drive gear 58 of the stepping motor 56 is positioned at a preset reference rotation position, the left and right rotation shafts 28, 30 of the display case 12 are located. In a state in which the portion opposite to the formation side of the housing 14 is projected to the outside through the cutout portion 44 of the third side wall portion 40 of the housing 14 and the monitor screen of the display body 10 is directed downward, the display The case 14 and the display body 10 can be laid down horizontally.

  Thus, here, the drive gear 58 of the stepping motor 56 is moved in the counterclockwise direction as the stepping motor 56 is driven to rotate by operating a switch (not shown) from the state where the drive gear 58 of the stepping motor 56 is positioned at the reference rotation position. The driven gear 32 meshed with the drive gear 58 is rotated by 90 ° in the clockwise direction, so that the display case 12 and the display main body 10 are horizontally moved. From the state of lying down, the standing state stands upright in the vertical direction as indicated by a two-dot chain line in FIGS. 1 and 2. From such a standing state, when the stepping motor 56 is reversely rotated by the switch operation and the drive gear 58 is rotated by a predetermined angle in the clockwise direction until it is again positioned at the reference rotation position. Further, the driven gear 32 is rotated by 90 ° in the counterclockwise direction, so that the display case 12 and the display main body 10 are laid again in the horizontal direction.

  Thereby, in the display apparatus of this embodiment, for example, the housing 14 is attached to an instrument panel (not shown) so as to be housed and positioned in a recess provided therein, and is mounted on an automobile. In the case of non-use, the display case 12 and the display main body 10 are in a lying state and stored in the recess of the instrument panel so that they do not get in the way, and the lid 20 of the display case 12 The design surface 21 is exposed on the instrument panel. On the other hand, during use, the stepping motor 56 is driven to rotate, the display case 12 and the display body 10 are raised, and the monitor screen of the display body 10 can be visually recognized by the passenger. It has become.

  By the way, in such a display device of the present embodiment, in particular, the conventional device for cooling the heat generating portion 60 located at the right end toward the monitor screen in the longitudinal direction of the display body 10 is used. A special structure that cannot be seen is given.

  More specifically, as is apparent from FIGS. 2 and 3, the bottom wall portion 26 of the display case 12 has predetermined dimensions on the side of the lid body 20 and the side of the right wall portion 24 rather than the center portion thereof. A circular ventilation opening 62 penetrating the portion is formed at the offset position. As a result, the internal space of the display case 12 communicates with the outside through the air vent 62 separately from the inner holes of the left and right rotating shafts 28 and 30.

  In addition, an electric cooling fan 64 is provided on the outer surface of the bottom wall portion 26 of the display case 12 provided with such a ventilation port 62, and a blade 66 is provided at the opening of the ventilation port 62 to the outside of the display case 12. It is installed in a state where it is positioned. Accordingly, the outside air can be blown as cooling air into the display case 12 by the cooling fan 64 through the ventilation opening 62.

  Further, as shown in FIGS. 2 to 4, a frame body 68 is integrally formed on the inner surface 67 of the display case 12 opposite to the design surface 21 of the lid body 20 that takes the form of a long rectangular inclined plate. Is provided. The frame body 68 is formed on the left and right sides of the inner surface 67 of the lid body 20 at a portion that is biased toward the bottom wall portion 26 at the center in the opposing direction of the left wall portion 23 and the right wall portion 24 of the case body 16. A thin trapezoidal flat plate-like first side plate that is opposed to the wall portions 23 and 24 and that extends in parallel to each other in a direction perpendicular to the facing direction while being spaced apart from each other in a facing direction therebetween. The portion 70a, the second side plate portion 70b, and the end portions of the two side plate portions 70a, 70b on the ceiling wall portion 25 side are connected to each other, and are formed in a longitudinal rectangular flat plate shape standing on the inner surface 67 of the lid body 20. The connecting plate portion 72 has a substantially U-shape as a whole.

  The frame body 68 is disposed so as to surround the central portion of the back surface of the display main body 10 accommodated in the display case 12. In other words, the first side plate portion 70a, the connecting plate portion 72, and the second side plate portion 70b of the frame body 68 are arranged in the order of the left side end portion, the upper side end portion, and the right side end portion of the back surface of the display main body 10, respectively. It is arrange | positioned so that it may extend in U shape inside. Further, a ventilation port 62 provided in the bottom wall portion 26 of the case body 16 is positioned between the second side plate portion 70 b of the frame body 68 and the right side wall portion 24 of the case body 16.

  Furthermore, in the frame body 68, the height of the end portion on the bottom wall portion 26 side of each side plate portion 70a, 70b having a trapezoidal shape is the end on the ceiling wall portion 25 side connected to the connecting plate portion 72. The side plate portions 70a, 70b and the end surface of the connecting plate portion 72 opposite to the inner surface 67 side of the lid body 20, in other words, the display housed in the display case 12 A surface facing the back surface of the main body 10 is a flat surface extending in parallel with the back surface of the display main body 10. And the clearance gap between the back surface of these display main bodies 10 and the opposing surface which consists of each side board part 70a, 70b and the connection board part 72 which opposes it is made small enough. Further, the end surfaces of the side plate portions 70a and 70b facing the bottom wall portion 26 are flat surfaces extending in parallel with the bottom wall portion 26, and the bottom wall portions 26 and the flat side walls 70 facing each other are flat. The gap between the opposing surfaces is sufficiently small.

  Thus, in the present embodiment, in the display case 12, the first and second side plate portions 70 a and 70 b of the frame body 68, the outer surfaces of the connecting plate portion 72, the inner surface of the case body 16, and the inner surface 67 of the lid body 20. An air passage 74 extending in a U shape is formed along the outer periphery of the back surface of the display main body 10. The air passage 74 passes through the ventilation holes 62 provided in the bottom wall portion 26 of the case body 16 and the inner holes of the left and right rotation shafts 28 and 30 formed in the left and right wall portions 23 and 24. The display case 12 communicates with the outside.

  Thereby, in the display device of the present embodiment, the outside air of the display case 12 is introduced as cooling air into the air passage 74 inside the display case 12 as cooling air by the operation of the cooling fan 64. The air passage 74 is made to flow from the right end portion inside the display case 12 to the left end portion via the upper end portion. At this time, the cooling air is brought into direct and intensive contact with the entire surface of the back surface of the heat generating unit 60 located at the right end of the display body 10, so that the heat generating unit 60 is brought into contact with the cooling air. Heat is taken away and it becomes cooled. And the air heated by taking the heat of the heat generating part 60 is made to flow in the air passage 74, and most of the air is left and right rotating shafts 28, 30 and the first and second support parts 52, Through the inner holes 54 and the respective through holes 50, the liquid is allowed to flow out of the display case 12.

  As described above, in the display device of the present embodiment, the heat generating portion 60 of the display main body 10 is cooled by the outside air outside the display case 12 blown into the display case 12 by the cooling fan 64. ing. Therefore, for example, the cooling fan installed in the display case 12 blows the air in the display case 12 heated by the heat generating part 60 to the heat generating part 60 to cool the heat generating part 60. Unlike the device, the heat generating portion 60 of the display body 12 can be more sufficiently cooled.

  Further, in such a display device, the cooling air, which is sent into the display case 12 and is composed of outside air outside the display case 12, immediately flows to the back surface portion of the heat generating part 60 of the display body 10 due to the flow in the air passage 74. Therefore, the heat generating unit 60 can be more efficiently cooled by directly and intensively contacting the entire back surface of the heat generating unit 60.

  Moreover, in this embodiment, the cooling fan 64 is installed on the outer surface of the display case 12 where a sufficient space for installing the cooling fan 64 can be secured. Therefore, unlike the case where the cooling fan 64 is installed in a limited space in the narrow display body 10 or the display case 12, the range of selection of the installation position of the cooling fan 64 can be sufficiently expanded. .

  Therefore, in the display device of this embodiment as described above, the cooling performance for the heat generating part 60 of the display main body 10 can be enhanced not only extremely effectively, but also the cooling fan that blows cooling air to the heat generating part 60. The degree of freedom of the 64 installation positions can be advantageously increased. As a result, the adverse effects of heat on the electronic components in the display main body 10 are advantageously reduced or eliminated without incurring any increase in size or complicated structure associated with the installation of the cooling fan 64. Thus, a stable operating state and sufficient use durability can be ensured extremely effectively.

  In this embodiment, the cooling fan 64 accommodates the display main body 10 and is rotated together with the display main body 10, and the frame body 68 is integrated with the inner surface 67 of the lid 20 of the case main body 16. Since the display case 12 is provided on the outer surface of the display case 12, the cooling air is blown into the air passage 74 inside the display case 12 regardless of the rotation position of the display case 12. The heating unit 60 of the main body 10 can be brought into contact with the back surface portion. Accordingly, even when the display device with the display case 12 standing up is being used or when the display device with the display case 12 lying down is not in use, the heat generating portion 60 of the display main body 10 can be cooled. Can be implemented efficiently and freely.

  Furthermore, in the display device of the present embodiment, the air passage 74 is formed in a relatively simple structure in which the U-shaped frame body 68 is simply erected on the inner surface 67 of the lid body 20. Since the cooling air sent into the display case 12 by the cooling fan 64 can be brought into direct and concentrated contact with the entire back surface of the heat generating portion 60, the structure of the entire display device is complicated. Therefore, efficient cooling of the heat generating portion 60 of the display main body 10 can be realized extremely advantageously while suppressing as much as possible an increase in cost due to the complicated structure.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, the structure for rotating or rotating the display case 12 about the left and right rotation shafts 23 and 24 is not limited to the illustrated structure, and a known structure can be appropriately adopted.

  Further, the installation position of the cooling fan 64 may be any position as long as it is outside the display case 12. For example, the display case 12 may be provided on the outer surface of the left side wall portion 23 and the right side wall portion 24, or may be provided on the inner surfaces of the first to fourth side wall portions 36 to 42 of the housing 14. As described above, when the installation position of the cooling fan 64 is changed, the cooling fan 64 with the changed installation position can be used for the display case 12 so that the cooling air can be blown into the display case 12. The formation position of the ventilation opening 62 is also changed as appropriate, and the shape, structure, and formation position of the air passage 74 can also reliably guide the cooling air blown into the display case 12 to the heat generating portion 60 of the display body 10. Will be changed.

  Further, even when the cooling fan 64 is provided on the outer surface of the bottom wall portion 26 of the case main body 16 of the display case 12 as shown in the embodiment, the shape, structure, and formation position of the air passage 74 are changed. Of course it is possible.

  That is, in the embodiment, the frame body 68 that forms the air passage 74 is erected integrally with the inner surface 67 of the lid body 20 of the display case 12, but such a frame body 68 or a frame The member for forming the air passage 74 other than the body 68 is formed by a member separate from the lid body 20 of the display case 12, and is fixed to the inner surface 67 of the lid body 20 by adhesion or the like. It may be fixed to the back surface of the display main body 10 by adhesion or the like, or may be integrally formed on the inner surface of the case main body 16.

  In the above embodiment, the left and right rotation shafts 28 and 30 having a cylindrical shape, the inner holes of the first and second support parts 52 and 54, and the through holes 50 are heated by the heat generating part 60. However, it is also possible to provide such a discharge port in the display case 12 separately from them. However, this outlet is not always necessary.

  In addition, in the said embodiment, although the specific example of what applied this invention to the display apparatus attached to the instrument panel of a motor vehicle was shown, this invention is a part other than the instrument panel of a motor vehicle, or a motor vehicle. Of course, the present invention is advantageously applied to any of in-vehicle display devices attached to vehicles other than the above.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention can be implemented in various forms. Accordingly, various embodiments relating to various changes, modifications, and improvements of the present invention adopted based on the knowledge of those skilled in the art are all within the scope of the present invention without departing from the spirit of the present invention. It should be understood that it belongs.

It is front explanatory drawing which shows one Embodiment of the vehicle-mounted display apparatus which has a structure according to this invention. It is II-II sectional explanatory drawing in FIG. FIG. 3 is an explanatory view taken along the line III-III in FIG. 2. It is a perspective explanatory view of the lid which constitutes a part of the display case of the in-vehicle display device shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display main body 12 Display case 14 Housing 16 Case main body 20 Cover body 28 Left side rotating shaft 30 Right side rotating shaft 52 First support part 54 Second support part 60 Heat generating part 62 Ventilation hole 64 Cooling fan 68 Frame body 74 Air passage

Claims (2)

A display main body, a display case that accommodates the display main body therein, a support member that supports the display case so as to be rotatable about one axis, and is attached to a vehicle. In the in-vehicle display device configured so that the display main body stands up or lies down,
The display case is provided with a ventilation port that communicates the inside and outside of the display case, and a cooling fan that blows cooling air into the display case through the ventilation port is installed outside the display case. An in-vehicle display device characterized in that an air passage for guiding the cooling air blown to the heat generating portion of the display body is provided inside the display case. The in-vehicle display device according to claim 1, wherein the cooling fan is attached to an outer surface of the display case.

Images