JP6069017B2 - Head-up display device - Google Patents

Description

  The present invention relates to a head-up display device that projects a virtual image onto a projection area of a windshield of a vehicle, and superimposes the foreground of the vehicle that is visually recognized through the windshield from the eyepoint of the vehicle and the projected virtual image.

  In recent years, along with the increase and diversification of information required by the driver during driving, especially urgent information is displayed as a virtual image on the windshield of the vehicle, and the vehicle foreground is visible through it. A head-up display (HUD) device is mounted on a vehicle such as an automobile or a train (see Patent Document 1).

JP 2010-64709 A

  By the way, the head-up display device is disposed in a cluster panel on the front surface of the driver's hand because of its structure.

  In order to ensure the safety of pedestrians or drivers, the cluster panel portion is partially broken to absorb the impact when an excessive impact force is applied to the vehicle.

  The above head-up display device arranged in such a cluster panel has a structure in which the housing is dropped when the mounting bracket is broken, but the cluster panel accommodates components at high density. Therefore, a sufficient stroke for shock absorption cannot be obtained only by dropping the housing due to destruction of the mounting bracket. For this reason, further consideration of safety for pedestrians or drivers is desired.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a head-up display device having excellent safety.

In order to achieve the above-described object, the head-up display device according to the present invention is characterized by the following (1) to ( 2 ).
(1) A head-up display device that is arranged in a cluster panel of a vehicle and projects a display light on a windshield of the vehicle to form a virtual image,
A resin case,
A display that emits the display light; and
The case has a weakened portion with a reduced thickness,
The fragile portion is provided along a fracture path starting from a stress concentration point when an impact force acts on the case,
The case has a lower case and an upper case attached to the upper portion of the lower case,
The upper case includes a substantially rectangular upper plate corresponding to the upper surface of the upper case, a pair of side plates extending downward from both side edges of the upper plate, and downward from both edges of the upper plate. A pair of extending end face plate portions,
In the upper surface plate portion, a substantially rectangular opening from which the display light is emitted has two sides along the extending direction of the both side edges at the respective inner positions of the both side edges , and the remaining two sides. wherein such at respective inner position of both edges along the extending direction of said end edge, and, wherein in the opposing direction of the pair of end faces plate portion Ri preferred to one end face plate portion, the pair of side plate portions Is provided at a position close to one side plate portion side in the opposite direction of
Of the four corners of the upper case, the weak part is provided at a corner where the one end face plate part and the one side plate part intersect, and the weak part is provided at the remaining three corners. Is not provided .
( 2 ) A head-up display device configured as described in ( 1 ) above,
The fragile portion is provided in each of the lower case and the upper case.

The head-up display device having the configuration (1) includes a resin case having a weakened portion with a reduced thickness. Therefore, when an excessive impact force is applied to the vehicle, the case breaks and is crushed at the fragile portion in the cluster panel in which the parts are accommodated at a high density. This eliminates the problem that the head-up display device impedes the destruction of the cluster panel when an excessive impact force is applied to the vehicle. Therefore, it is possible to secure a sufficient shock absorbing function in the cluster panel when an excessive impact force is applied to the vehicle, and it is possible to improve the safety for the driver or the pedestrian.
In addition, since the fragile part is provided along the fracture path starting from the stress concentration point when an impact force is applied to the case, the case will be damaged when an excessive impact force is applied to the vehicle. Therefore, it is possible to secure a reliable shock absorbing function in the cluster panel.
In addition, in the head-up display device having the above configuration (1), since the fragile portion is provided in the vicinity of the opening of the case, the case can be more easily destroyed when an excessive impact force is applied to the vehicle. It will be crushed and the shock absorbing function can be exhibited more reliably.
In the head-up display device configured as described in (2) above, when an excessive impact force is applied to the vehicle, the case is broken and crushed by the weak portions provided in a plurality of locations of the case, so that the cluster panel can Thus, the shock absorbing function can be ensured, and the safety for the driver or pedestrian can be further enhanced.
In addition, in the head-up display device having the above configuration ( 2 ), when an excessive impact force is applied to the vehicle, it is broken and crushed at each weak part of the lower case and the upper case, so that A sufficient shock absorbing function can be ensured, and the safety of the driver or pedestrian can be further enhanced.

  ADVANTAGE OF THE INVENTION According to this invention, the head-up display apparatus excellent in safety can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a schematic cross-sectional view of a part of a vehicle in which a head-up display device according to an embodiment of the present invention is installed. FIG. 2 is a perspective view of the head-up display device according to the embodiment of the present invention with the display assembly and the wiring board removed. FIG. 3A to FIG. 3E are views for explaining the structure and the weak part of the lower case of the head-up display device according to the embodiment of the present invention. FIG. 4A to FIG. 4C are views for explaining the structure and the weak part of the upper case of the head-up display device according to the embodiment of the present invention.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic sectional view of a part of a vehicle in which a head-up display device according to an embodiment of the present invention is installed, and FIG. 2 is a display assembly and a wiring board in the head-up display device according to the embodiment of the present invention. FIG. 3A to FIG. 3E are views for explaining the structure of the lower case and the fragile portion of the head-up display device according to the embodiment of the present invention, and FIG. FIG. 4C is a view for explaining the structure and the weak part of the upper case of the head-up display device according to the embodiment of the present invention.

  As shown in FIG. 1, the head-up display device 10 is disposed in the cluster panel 1 on the front side of the driver of the vehicle. The head-up display device 10 reflects the display light L emitted from the display 22 by the reflection mirror 23 and irradiates the driver's eye range in the windshield 2. Accordingly, the driver can superimpose the foreground of the vehicle visually recognized through the windshield 2 from the eye point of the vehicle and the projected virtual image S. Accordingly, the driver can superimpose and visually recognize information with high urgency displayed on the windshield 2 together with the foreground of the vehicle.

  As shown in FIG. 2, the head-up display device 10 has a case 11. The case 11 includes a lower case 12 and an upper case 13, and the case 11 is configured by assembling the upper case 13 on the upper portion of the lower case 12.

  The lower case 12 and the upper case 13 are made of synthetic resin and are molded by injection molding or the like.

  A display assembly 14 is assembled to one end of the case 11. The display assembly 14 includes a display 22 made of a VFD (fluorescent display tube) such as AMVFD (Active Matrix Vacuum Fluorescent Display), a heat sink 24, and a heat sink cover 25, and these are fixed means such as screws. It is comprised by integrating by. The display assembly 14 is mounted on the wiring board 26 and assembled to the case 11, and emits display light L from the display 22. A reflection mirror 23 is disposed in the case 11 and the display light L from the display 22 is reflected.

  The upper case 13 is assembled to the upper portion of the lower case 12 by screwing or the like to form the case 11, and thereby the inside of the case 11 is shielded from light. The upper case 13 has an opening 28 at a location where the display light L reflected by the reflection mirror 23 is guided. A front glass 27 is attached to the opening 28. Then, the display light L reflected by the reflecting mirror 23 is applied to the windshield 2 through the front glass 27 of the opening 28 of the upper case 13.

  As shown in FIGS. 3A to 3E, the lower case 12 includes a bottom plate portion 31 corresponding to the bottom surface of the case 11 and side plate portions 32 formed on both side portions of the bottom plate portion 31. And end face plate portions 33 formed at both end portions of the bottom plate portion 31. The lower case 12 is provided with fragile portions 35 at a plurality of locations. In FIG. 3B to FIG. 3E, the fragile portion 35 is hatched. These fragile portions 35 include corner portions (see FIG. 3C) between the bottom plate portion 31 and the side plate portion 32, and corner portions (see FIG. 3B) between the side plate portion 32 and the end face plate portion 33. 3 (e)) and a step portion (see FIG. 3 (d)) formed on the side plate portion 32. These fragile portions 35 are thinned by stealing meat or forming grooves.

  Further, the lower case 12 is formed with a plurality of brackets 12a around the periphery, and the head-up display device 10 is clustered by screwing these brackets 12a to a fixing portion in the cluster panel 1 of the vehicle. It is fixed at a predetermined installation location in the panel 1.

  As shown in FIGS. 4A to 4C, the upper case 13 includes an upper surface plate portion 41 corresponding to the upper surface of the case 11 and side surface plate portions 42 formed on both side portions of the upper surface plate portion 41. And end face plate portions 43 formed at both end portions of the upper surface plate portion 41. The upper case 13 is provided with fragile portions 45 at a plurality of locations. 4B and 4C, the fragile portion 45 is hatched. These fragile portions 45 are formed at corners (see FIG. 4C) between the side plate portions 42 and the end plate portions 43 and at step portions (see FIG. 4B) formed in the side plate portions 42. Is provided. These weak portions 45 are thinned by stealing meat or forming grooves. The fragile portion 45 of the upper case 13 is provided in the vicinity of the opening 28.

  As described above, the head-up display device 10 is arranged in the cluster panel 1 on the front surface of the driver's hand in the vehicle. A part of the cluster panel 1 is broken when an excessive impact force is applied to the vehicle in order to protect a pedestrian or a driver.

  In the head-up display device 10 according to the present embodiment arranged in the cluster panel 1 as described above, the fragile portions 35 and 45 provided in the lower case 12 and the upper case 13 are stresses generated when an impact force is applied. It is provided so as to continue along the destruction path starting from the concentration point.

  In the head-up display device 10 according to the present embodiment, when an excessive impact force is applied to the vehicle, the plurality of weak parts 35 and 45 provided in the lower case 12 and the upper case 13 are destroyed, and the lower case 12 and the upper case are destroyed. 13 decomposes.

  As described above, according to the head-up display device 10 having the above-described configuration, the resin case 11 having the weakened portions 35 and 45 having a reduced thickness is provided. Therefore, when an excessive impact force is applied to the vehicle, the case 11 is broken and crushed by the fragile portions 35 and 45 in the cluster panel 1 in which components are accommodated at a high density. Thereby, the trouble that the head-up display device 10 inhibits the destruction of the cluster panel 1 when an excessive impact force is applied to the vehicle is eliminated. Therefore, a sufficient shock absorbing function in the cluster panel 1 when an excessive impact force is applied to the vehicle can be secured, and the safety of the driver or pedestrian can be improved.

  Moreover, since the fragile portions 35 and 45 are provided along the fracture path starting from the stress concentration point when the impact force is applied to the case 11, the case is subjected to an excessive impact force applied to the vehicle. 11 is surely broken along the fragile portions 35 and 45, and thus a reliable shock absorbing function in the cluster panel 1 can be ensured.

  Here, the impact point, which is the point at which the impact force acting on the vehicle acts, is not constant. For this reason, when the destruction path in the case 11 is not determined, the destruction path until the case 11 is destroyed varies depending on the impact point. As a result, the cluster panel 1 can stably reach the required stroke. It is difficult to determine the necessary stress. However, in this embodiment, the destruction path can be made the same without being affected by the impact point. That is, the head-up display device 10 according to the present embodiment has a robust structure capable of performing stable shock absorption.

  In addition, when an excessive impact force is applied to the vehicle, the case 11 is broken and crushed by the fragile portions 35 and 45 provided in a plurality of locations of the case 11, so that a sufficient shock absorbing function in the cluster panel 1 can be obtained. This can ensure the safety of the driver or pedestrian.

  Further, since the fragile portion 45 is provided in the vicinity of the opening portion 28 of the case 11, the case 11 is more easily broken and crushed when an excessive impact force is applied to the vehicle, and the shock absorption is more reliably performed. The function can be demonstrated.

  Further, when an excessive impact force is applied to the vehicle, a sufficient impact absorbing function in the cluster panel 1 is ensured by being broken and crushed by the respective weak portions 35 and 45 of the lower case 12 and the upper case 13. This can further increase the safety of the driver or pedestrian.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 1 Cluster panel 2 Windshield 10 Head up display apparatus 11 Case 12 Lower case 13 Upper case 22 Indicator 28 Opening part 35, 45 Fragile part L Display light

Claims (2)

A head-up display device that is arranged in a cluster panel of a vehicle and projects a display light on a windshield of the vehicle to form a virtual image,
A resin case,
A display that emits the display light; and
The case has a weakened portion with a reduced thickness,
The fragile portion is provided along a fracture path starting from a stress concentration point when an impact force acts on the case,
The case has a lower case and an upper case attached to the upper portion of the lower case,
The upper case includes a substantially rectangular upper plate corresponding to the upper surface of the upper case, a pair of side plates extending downward from both side edges of the upper plate, and downward from both edges of the upper plate. A pair of extending end face plate portions,
In the upper surface plate portion, a substantially rectangular opening from which the display light is emitted has two sides along the extending direction of the both side edges at the respective inner positions of the both side edges , and the remaining two sides. wherein such at respective inner position of both edges along the extending direction of said end edge, and, wherein in the opposing direction of the pair of end faces plate portion Ri preferred to one end face plate portion, the pair of side plate portions Is provided at a position close to one side plate portion side in the opposite direction of
Of the four corners of the upper case, the weak part is provided at a corner where the one end face plate part and the one side plate part intersect, and the weak part is provided at the remaining three corners. Is not provided . A head-up display device characterized by that . Head-up display device according to claim 1, wherein the fragile portion is provided on each of said lower case and said upper case.

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