JP6437127B2 - Car body mounting structure for vehicle head-up display device - Google Patents

Description

  This case relates to a vehicle body mounting structure of a vehicle head-up display device that displays a necessary information by forming a virtual image in front of a driver's seat.

  Recently, a vehicle head that projects a display image on the front window of a vehicle to form a virtual image in front of the driver and can visually recognize the display image without diverting the line of sight from the front even during driving. Up-display devices have been put into practical use.

  For example, a vehicle head-up display device that displays a virtual image through a curved front window has been proposed. In such a vehicle head-up display device, heat generated by an illumination light source that illuminates a liquid crystal panel installed as a display for displaying a display image from the back side, and the inside of the display from outside the vehicle In order to prevent the problem that the temperature of the liquid crystal panel rises due to the heat from sunlight entering the display staying inside the display, a heat sink with a heat dissipation member (heat sink) is provided on the display (For example, Patent Document 1).

JP 2013-174855 A

  However, in the vehicle head-up display device described in Patent Document 1, since the radiator having the heat radiating member (heat sink) is provided, the size of the display (head-up display device main body) is useless. Due to the increase in size, the capacity of the instrument panel inside deteriorated.

  In particular, in such a head-up display device for a vehicle, a brighter light source is used if the enlargement ratio of the display image is increased in order to increase the visibility of the virtual image and a larger virtual image is displayed farther away. There was a need to do. In such a case, since more heat is generated, it is necessary to increase the heat radiation amount. Then, since it is necessary to use a larger heat radiating member (heat sink), it is necessary to further increase the size of the display (head-up display device main body). Thereby, there existed a problem that the accommodation property to the instrument panel of a display device will deteriorate further.

  This case has been made in view of such problems, and the vehicle head-up having the necessary heat radiation performance without causing unnecessary enlargement of the display (head-up display device main body) accompanying the installation of the heat radiation member. An object of the present invention is to provide a vehicle body mounting structure for a display device.

In order to solve the above-mentioned problem,
A casing of a head-up display device for a vehicle is disposed between a dash panel constituting a front wall of the passenger compartment and a steering member installed on the rear side of the dash panel, and is covered with an instrument panel. And
A part of the casing is formed of a heat conductive member, and the other part of the casing is formed of resin .
The heat conduction member includes at least one first installation support member provided between the heat conduction member and the steering member;
Each of the heat conducting member and the dash panel is fixed to at least one second erection support member,
The first erection support member is a member different from the heat conduction member, and is located within the width range of the casing, and has a planar attachment portion that is in surface contact with the rear surface of the casing,
The second erection support member is a separate member from the heat conducting member, and is located within the width range of the casing, and has a planar attachment portion that is in surface contact with the front surface of the casing,
At least one of the first erection support member and the second erection support member has a vehicle body mounting structure for a vehicle head-up display device .

According to the vehicle head-up display device according to the present invention, with the above-described configuration, the heat generated inside the casing that generates and projects the display image is fastened and fixed to the heat conducting member and the heat conducting member. Since the heat is transmitted to the steering member and the dash panel through the first erection support member and the second erection support member having heat conductivity, the heat radiating member is not installed as a separate member. Ru can be performed heat radiation of the inner casing. By this, it is possible to improve the degree of freedom in the layout of the casing inside the instrument panel.

It is a longitudinal cross-sectional view of the instrument panel provided with the vehicle head-up display apparatus which concerns on Example 1 which is one embodiment of this case. FIG. 2 is an enlarged longitudinal sectional view of a casing (head-up display device main body) of the vehicle head-up display device shown in FIG. 1. It is a figure explaining the operation | movement which the virtual head-up display apparatus of FIG. 1 produces | generates a virtual image. It is a top view which shows the fastening structure of the casing (head-up display apparatus main body) in Example 1. FIG. It is a left view (A arrow line view of FIG. 4A) of the casing (head-up display apparatus main body) in Example 1. FIG. It is the rear view (B arrow view of FIG. 4A) which looked at the casing (head-up display apparatus main body) in Example 1 from the vehicle front. In the vehicle head-up display device according to Example 2 which is an embodiment of the present invention, it is a perspective view showing a state of a casing (display) fastened and fixed to a steering member. It is a top view (C arrow view of FIG. 5) of the casing (head-up display apparatus main body) in Example 2. FIG. It is a left view (D arrow view of FIG. 5) of the casing (head-up display apparatus main body) in Example 2. FIG. It is a bottom view (E arrow view of FIG. 5) of the casing (head-up display apparatus main body) in Example 2. FIG. It is the top view which drew typically the fastening structure of the casing (head-up display apparatus main body) in Example 2. FIG. It is a left view (F arrow line view of FIG. 7A) of the fastening structure of the casing (head-up display apparatus main body) in Example 2. FIG. It is the rear view (G arrow line view of FIG. 7A) which looked at the fastening structure of the casing (head-up display apparatus main body) in Example 2 from the vehicle front. It is a 1st figure explaining the effect | action of the radiation fin in Example 2. FIG. It is a 2nd figure explaining the effect | action of the radiation fin in Example 2. FIG. It is a figure explaining the steering wheel damping function in Example 2. FIG. It is a figure explaining the effect of a steering wheel damping function. It is a figure explaining the moment reduction function of the steering shaft in Example 2. FIG. It is a top view which shows the fastening structure of the casing (head-up display apparatus main body) in the head-up display apparatus for vehicles as a comparative example. It is a left view (I arrow line view of FIG. 11A) of the casing (head-up display apparatus main body) in the head-up display apparatus for vehicles as a comparative example. It is the rear view (J arrow view of FIG. 11A) which looked at the casing (head-up display apparatus main body) in the vehicle head-up display apparatus as a comparative example from the vehicle front.

  Hereinafter, specific embodiments of the vehicle head-up display device of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a structure of a vehicle head-up display device 100a according to an embodiment of the present invention. First, the overall configuration of the vehicle head-up display device 100a will be described with reference to FIG.

[Description of Overall Configuration of Vehicle Head-Up Display Device 100a]
As shown in the longitudinal sectional view of FIG. 1, a front wall panel 1 (dash panel) and a front window 2 (translucent member) are provided at the front portion of the vehicle compartment in a vehicle 10 such as an automobile. Yes. An instrument panel 3 is provided below the front window 2 so as to cover the front wall panel 1 of the passenger compartment.

  The instrument panel 3 has a vehicle width direction (a direction orthogonal to the plane of the drawing in FIG. 1) so as to be positioned on the rear side of the vehicle 10 (the right side of the plane of FIG. 1) with respect to the vehicle compartment front wall panel 1 (dash panel) A vehicle body strength member 4 (steering member) is provided extending to. A steering column 5 is fastened and fixed below the vehicle body strength member 4.

  Air conditioning ducts 11, 12, a harness 13 (a bundle of electric wires), an instrument panel 14, and the like are further provided in order from the front side of the vehicle 10 inside (on the upper side) of the instrument panel 3. The instrument panel 3 is provided with a meter hood 15 that covers an upper portion of the instrument panel 14 as a single body or as a separate body. A steering shaft 6 that forms a rotating shaft of a steering wheel (not shown in FIG. 1) is attached to the steering column 5 so as to protrude from the instrument panel 3 to the rear side of the vehicle 10. The protruding portion is covered with a column cover 16. In addition, since the arrangement | positioning location of the component inside the instrument panel 3 changes with vehicles, an above described structure is the example.

  Here, the vehicle compartment front wall panel 1 (dash panel) is provided below the front window 2 (translucent member) and partitions the vehicle compartment and the engine room. The vehicle body strength member 4 (steering member) has, for example, a circular cross section made of metal or light alloy, or other cross sectional shape. The air conditioning duct 11 is a duct (defroster duct) for blowing conditioned air to the front window 2 to prevent window fogging. The air conditioning duct 12 is a duct (ventilator duct) for blowing air for air conditioning toward the passenger.

  The head-up display device 100a for a vehicle is disposed in the gap inside the instrument panel 3 thus configured, specifically, at a position between the air conditioning duct 11 and the harness 13 above the steering column 5. A casing 22 (head-up display device main body) is installed. Above the casing 22, a part of the instrument panel 3 is cut out to form an opening 29. The opening 29 allows the “light beam for forming a virtual image” emitted from the casing 22 to pass toward the front window 2 (translucent member). The operation for forming a virtual image will be described in detail later.

  The casing 22 (head-up display device main body) generates display information necessary for forming a virtual image therein, and projects the generated display information onto the front window 2 (translucent member). A reflective film for reflecting a light beam for forming a virtual image is provided on the surface of the front window 2 on the vehicle interior side. A dust-proof cover 27 is provided above the casing 22 in a region through which a light beam for forming a virtual image passes. Details of the internal structure of the casing 22 will be described later.

  As shown in FIG. 1, the bottom surface of the casing 22 (head-up display device main body) is fastened and fixed to the vehicle body strength member 4 (steering member) by a rear bracket 40e (first erection support member). Further, it is fastened and fixed to the passenger compartment front wall panel 1 (dash panel) by a front bracket 40d (second erection support member).

  Next, the detailed structure inside the casing 22 (head-up display device main body) will be described with reference to FIG.

[Description of Detailed Structure of Casing 22 (Head-Up Display Device Body)]
As shown in FIG. 2, the casing 22 (head-up display device main body) includes an image display unit 23 a composed of a liquid crystal panel for displaying images and videos, and a halogen lamp or LED (LED) that transmits and illuminates the image display unit 23 a from the back side. The front window 2 described with reference to FIG. 1 is reflected by reflecting, in the direction of the arrow L, the display image representing the vehicle speed, for example, displayed on the image display unit 23a and the illumination unit 23b composed of an illumination light source such as a light emitting diode). And optical path forming components 24, 25, and 26 for projecting toward (translucent member).

  The optical path forming components 24, 25, and 26 are configured by reflecting mirrors (single or plural plane mirrors, convex mirrors, concave mirrors) that guide the display image displayed on the image display unit 23a toward the front window 2 (translucent member). The Note that the number and type of optical components constituting the optical path forming components 24, 25, and 26 are appropriately designed according to the display size and imaging distance of a virtual image to be displayed.

  The image display unit 23a generates not only a liquid crystal panel but also a DLP method for generating a display image by scanning light emitted from an LED with a micromirror, and a display image by scanning light emitted from a laser light source. You may comprise by a laser system. However, when the DLP method or the laser method is used, a screen for generating a display image by light emitted from the light source is installed inside the casing 22 instead of the optical path forming component 24.

  Next, the operation | movement in which the head-up display apparatus 100a for vehicles produces | generates a virtual image is demonstrated using FIG.

[Description of virtual image generation]
The light beam 51 emitted from the point P0 of the display image generated on the image display unit 23a and passing through the opening 29 is, for example, the point P1 of the front window 2 (translucent member), and the normal direction N1 of the front window 2 Regular reflection in the direction uniquely determined by. The light beam 51 specularly reflected in this way travels in the direction of the eyeball 92 of the driver 91 as a reflected light beam 52. A display image displayed on the image display unit 23a is located outside the vehicle 10, that is, at a position where the reflected light beam 52 extends to the outside of the front window 2, or at a position including a point P2 ahead of the front window 2 by a predetermined distance. Displayed as a virtual image 53.

  Although the position of the eyeball 92 of the driver 91 varies depending on the individual, it is statistically present inside an ellipsoid called eye range R corresponding to the left and right eyes. The vehicle head-up display device 100 a is designed so that the virtual image 53 can be viewed from the position inside the eye range R.

  Here, the display size and imaging distance of the virtual image 53 displayed in the vehicle head-up display device 100a are determined by the optical parameters of the optical path forming components 24, 25, and 26 (the curvature of the reflecting mirror and the layout of each optical path forming component). First, it is determined by the distance between the casing 22 and the front window 2 or the like.

  Here, first, in a vehicle head-up display device 100 as a comparative example, a casing 22 (head-up display device main body), a vehicle compartment front wall panel 1 (dash panel), a vehicle body strength member 4 (steering member), The fastening structure will be described with reference to the drawings.

[Description of fastening structure of casing (head-up display device body) of comparative example]
FIG. 11A is a plan view showing a fastening structure of casing 22 (head-up display device main body) in vehicle head-up display device 100 as a comparative example. 11B is a left side view thereof, and FIG. 11C is a rear view of the vehicle 100 as viewed from the front side. In addition, in order to make the drawing easy to understand, in FIG. 11C, the cabin front wall panel 1 (dash panel) that should be illustrated is omitted.

  The casing 22 (head-up display device main body) shown in FIG. 11A has a thermally conductive casing 22a as shown in FIG. 11B as viewed from the arrow I in FIG. 11A and FIG. 11C as viewed from the arrow J in FIG. (Thermal conduction member), a resin casing 22b, and heat radiation fins 22c formed on the surface of the thermal conductive casing 22a. The casing 22 has a complicated outer shape as shown in FIG. 2, but in FIGS. 11A to 11C, it is described as a simple rectangular parallelepiped shape for easy understanding of the drawings.

  The heat conductive casing 22a (heat conductive member) is made of a metal such as aluminum or a resin material having high heat conductivity, and serves as a heat source installed inside the casing 22 (head-up display device main body). The illumination unit 23b (see FIG. 2) and a circuit board (not shown) that drives the image display unit 23a (see FIG. 2) are provided in contact with each other, and the heat accumulated in the casing 22 is heated. The structure is transmitted to the conductive casing 22a. In FIG. 2, the illumination unit 23 b and the image display unit 23 a as a heat source are installed on a wall surface of a chamber provided inside a thermally conductive casing 22 a (heat conducting member) located below the casing 22. However, as shown in FIG. 4B, the heat source is the inner surface of the side wall of the thermally conductive casing 22a (heat conducting member) of the casing 22 (which is the front wall in the figure, but may be the rear wall). You may make it contact-arrange.

  The resin housing 22b is a protective member made of resin, and forms a housing as the casing 22 (head-up display device main body) in order to protect the inclusions such as the optical path forming components 24, 25, and 26.

  The heat radiating fins 22c are formed so as to be in contact with the lower surface of the heat conductive casing 22a (heat conductive member), and the heat transmitted to the heat conductive casing 22a is released to the outside, thereby the casing 22 (head-up display). Dissipates the heat accumulated inside the device body.

  As shown in FIGS. 11B and 11C, resin-made brackets 22d and 22e are installed in the resin casing 22b constituting the casing 22 (head-up display device main body). These brackets 22d and 22e are fastened and fixed to brackets 40a and 40b installed between the vehicle body strength member 4 (steering member) and the vehicle compartment front wall panel 1 (dash panel), respectively.

  As shown in FIG. 11B, a bracket 40c is further installed between the vehicle body strength member 4 (steering member) and the passenger compartment front wall panel 1 (dash panel) for reinforcement.

  By adopting such a fastening structure, the heat accumulated in the casing 22 (head-up display device main body) is passed through the instrument panel 3 (heat conduction member) and the heat radiation fins 22 c via the instrument panel 3 ( Heat is dissipated into the internal space.

  Next, the fastening structure of the casing 22 (head-up display device main body) in the first embodiment will be described with reference to the drawings.

[Description of Fastening Structure of Casing 22 (Head-Up Display Device Main Body) in Embodiment 1]
FIG. 4A is a plan view illustrating a fastening structure of a casing 22 (head-up display device main body) in the vehicle head-up display device 100a according to the first embodiment. 4B is a left side view thereof, and FIG. 4C is a rear view seen from the front of the vehicle. In addition, in order to make the drawing easy to understand, in FIG. 4C, the illustration of the front wall panel 1 (dash panel) that should be originally illustrated is omitted.

  The casing 22 (head-up display device main body) of Example 1 shown in FIG. 4A is thermally conductive as shown in FIG. 4B, which is a view as viewed from the arrow A in FIG. 4A, and FIG. It comprises a conductive case 22a (heat conducting member) and a resin case 22b. The casing 22 has a complicated outer shape as shown in FIG. 2, but in FIGS. 4A to 4C, it is described as a simple rectangular parallelepiped shape for easy understanding of the drawings.

  The heat conductive casing 22a (heat conductive member) is formed of a metal such as aluminum or a resin material having high heat conductivity, and is a heat source installed inside the casing 22 (head-up display device main body). The illumination unit 23b and a circuit board (not shown) are provided in contact with each other, and the heat of the casing 22 is transmitted to the thermally conductive casing 22a.

  The resin housing 22b is a protective member made of resin, and forms a housing as the casing 22 (head-up display device main body) in order to protect the inclusions such as the optical path forming components 24, 25, and 26.

  As shown in FIG. 4A and FIG. 4B, the front bracket 40d (second erection) is provided on the front side of the vehicle of the heat conductive casing 22a (heat conducting member) (upward in the drawing in FIG. Support member) is installed. The front bracket 40d fastens and fixes the thermally conductive casing 22a (the front wall thereof) and the vehicle compartment front wall panel 1 (the dash panel) (to allow heat conduction).

  Further, as shown in FIGS. 4A and 4B, rear brackets 40e and 40f are disposed on the rear side of the vehicle (the lower side in FIG. 4A and the right side in FIG. 4B) of the thermally conductive casing 22a (heat conducting member). (First erection support member) is installed. The rear brackets 40e and 40f fasten and fix the thermally conductive casing 22a (rear wall) and the vehicle body strength member 4 (steering member) (to allow heat conduction). At least one or both of the rear side brackets 40e, 40f (first erection support member) and the front side bracket 40d (second erection support member) are members having thermal conductivity. In particular, it is preferable that the rear side brackets 40e and 40f (first erection support member) are members having thermal conductivity. Further, the rear side brackets 40e and 40f (first erection support member) have the same length as the front side bracket 40d (second erection support member) or more than the front side bracket 40d (second erection support member). Can be lengthened or shortened.

  As shown in FIG. 4B, a reinforcing post bracket 40h (also a column bracket) is installed between the vehicle body strength member 4 (steering member) and the vehicle compartment front wall panel 1 (dash panel). .

  Heat generated inside the casing 22 (head-up display device main body) is transmitted to the front bracket 40d (second erection support member) via the heat conductive casing 22a (heat conduction member), and the vehicle interior front wall panel 1 (dash panel) radiates heat. Furthermore, the heat generated inside the casing 22 is transmitted to the rear brackets 40e and 40f (first erection support member) via the heat conductive casing 22a, and is radiated to the vehicle body strength member 4 (steering member). Therefore, according to the structure of Example 1, the radiation fin 22c with which a comparative example (FIG. 11A to FIG. 11C) is provided becomes unnecessary.

  In addition, since the radiation fin 22c becomes unnecessary, the overall height of the casing 22 (head-up display device main body) can be lowered, and thereby the installation property of the casing 22 can be improved.

  Further, the layout flexibility of the internal optical path forming components 24, 25, and 26 is improved while maintaining the same casing size as before, so that the imaging distance of the head-up display is increased and the display size is increased. be able to.

  Next, Example 2 which is other embodiment of the vehicle head-up display apparatus of this case is demonstrated with reference to drawings.

  Hereinafter, a vehicle head-up display device 100b according to another embodiment of the present invention will be described with reference to FIGS. 5 and 6A to 6C.

[Description of Fastening Structure of Casing 22 in Embodiment 2]
The overall configuration of the vehicle head-up display device 100b is substantially the same as the overall configuration of the vehicle head-up display device 100a described in the first embodiment. As shown in FIGS. 6A to 6C, the casing 22 (head-up display Only the fastening structure for fastening the device main body) to the vehicle body strength member 4 (steering member) and the vehicle compartment front wall panel 1 (dash panel) is different.

  FIG. 5 is a perspective view showing a state in which the casing 22 (head-up display device main body) is fastened and fixed to the vehicle body strength member 4 (steering member) in the second embodiment. FIG. 6A is a plan view illustrating a fastening structure of a casing 22 (head-up display device main body) in the vehicle head-up display device 100b according to the second embodiment. 6B is a left side view thereof, and FIG. 6C is a bottom view thereof.

  As shown in FIG. 5, a bracket 22f (attachment support member) and a bracket 22g (attachment support member) having thermal conductivity are attached to the left and right side surfaces of the casing 22 (head-up display device main body), respectively. The bracket 22f is fastened and fixed (to allow heat conduction) to a rear bracket 40f (first erection support member) attached to the vehicle body strength member 4 (steering member). Further, as shown in FIG. 6A, the bracket 22g is fastened and fixed (to allow heat conduction) to an erection support member 40g erected between the vehicle body strength member 4 and the passenger compartment front wall panel 1 (dash panel). Yes.

  Next, the heat dissipation structure of the casing 22 (head-up display device main body) will be described with reference to FIGS. 6B and 6C.

[Description of Heat Dissipation Structure of Casing 22 in Embodiment 2]
The casing 22 (head-up display device main body) shown in FIG. 6B includes a heat conductive casing 22a (heat conductive member) formed of a metal such as aluminum or a resin material having high heat conductivity, and a protective member made of resin. And a certain resin casing 22b. And this casing 22 has the radiation fin 22c formed with respect to at least one part of the surface of the heat conductive housing | casing 22a, as further shown to FIG. 6C.

  The brackets 22f and 22g (attachment support members) described above are attached to the heat conductive casing 22a (heat conduction member) side of the casing 22 (head-up display device main body), as shown in FIG. 6C. . Therefore, the heat generated inside the casing 22 is transmitted to the brackets 22f and 22g.

  Then, as shown in FIG. 6C, the heat transmitted to the bracket 22f is transmitted to the vehicle body strength member 4 (steering member) through the rear bracket 40f (first erection support member) and is radiated.

  Further, as shown in FIG. 6C, the heat transmitted to the bracket 22g is transmitted to the vehicle compartment front wall panel 1 (dash panel) and the vehicle body strength member 4 (steering member) via the installation support member 40g, and is dissipated. .

  Furthermore, as shown to FIG. 6C, the radiation fin 22c is partially formed in the surface of the heat conductive housing | casing 22a (heat conductive member). Therefore, the heat generated inside the casing 22 is also radiated from the radiating fins 22c. Note that, as described in the first embodiment, the heat radiating fins 22c may be removed. However, as will be described later, in the second embodiment, when the brake pedal is detached using the small heat radiating fins 22c. Since the guide function is realized, a few heat radiation fins 22c are left. However, in the second embodiment, since heat can be radiated through the brackets 22f and 22g (mounting support members), the number of the radiating fins 22c to be installed is compared with the above-described comparative example (FIG. 11C). Can be reduced.

  FIGS. 7A to 7C are three-sided views that are easy to understand in order to compare the fastening structure of the casing 22 (head-up display device main body) in the second embodiment with the fastening structure in the first embodiment (FIGS. 4A to 4C). is there. 7A to 7C are views seen from the same direction as FIGS. 4A to 4C, respectively. Although the casing 22 has a complicated outer shape, in FIGS. 7A to 7C, it is described as a simple rectangular parallelepiped shape for easy understanding of the drawings. In addition, in FIG. 7C, illustration of the vehicle compartment front wall panel 1 (dash panel) that should be illustrated is omitted.

  The fastening structure shown in FIGS. 7A to 7C is the rear bracket 40f (first erection structure) that fastens the heat conductive casing 22a (heat conductive member) and the vehicle body strength member 4 (steering member) in the first embodiment. The support member (FIG. 4A) is a thermally conductive bracket 22f (heat conductive member) installed in the heat conductive case 22a (heat conductive member) with respect to the heat conductive case 22a (heat conductive member) and the vehicle body strength member 4. It is different in that it is fastened via an attachment support member (FIG. 7C).

  Further, in the first embodiment, the rear bracket 40e (first support member) (FIG. 4A) for fastening the heat conductive casing 22a (heat conductive member) and the vehicle body strength member 4 (steering member), and the heat A front bracket 40d (second erection support member) (FIG. 4A) that fastens the conductive casing 22a (heat conducting member) and the vehicle interior front wall panel 1 (dash panel) is connected to the vehicle body strength member 4 and the vehicle interior front. It is integrally formed as a construction support member 40g installed between the wall panel 1 (dash panel) and the heat installed in the heat conductive casing 22a (heat conduction member) on this construction support member 40g. The difference is that a thermally conductive casing 22a (heat conducting member) is fastened via a conductive bracket 22g (mounting support member) (FIG. 7B).

  As a modification of the second embodiment, the erection support member 40g is divided into two members, and the rear side bracket (first erection support member) for fastening the bracket 22g and the vehicle body strength member 4 to each other, the bracket 22g and the vehicle The casing 22 can be securely fastened to the vehicle body strength member 4 and the passenger compartment front wall panel 1 even when configured as a front bracket (second support member) that fastens the passenger compartment wall panel 1 and the second embodiment. A similar heat dissipation effect can be obtained.

  7A, the fastening structure between the bracket 22f (mounting support member) and the rear bracket 40f (first erection support member) and the fastening structure between the bracket 22g (mounting support member) and the erection support member 40g are opposite to each other. The casing 22 can be securely fastened to the vehicle body strength member 4 and the passenger compartment front wall panel 1 even if the fastening structure on the left and right side surfaces of the casing 22 is reversed, and the same heat dissipation as in the second embodiment. An effect can be obtained.

  Next, operations other than the heat dissipation operation of the vehicle head-up display device 100b according to the second embodiment will be described with reference to the drawings.

[Description of Guide Function when Brake Pedal Drops in Example 2]
In the second embodiment, as shown in FIGS. 6C and 7C, small heat radiating fins 22c are installed on the lower surface of the heat conductive casing 22a (heat conductive member). The heat dissipating fins 22c are arranged with a certain distance in the vehicle width direction, and are arranged on the inner side of the outer fins 22p composed of high ribs and on the inner side of the outer fins 22p. And fins 22q.

  As shown in FIG. 8A, these heat radiation fins 22c (22p, 22q) are installed on the front side of the vehicle, in the vicinity of the brake pedal 60, so that the ribs of the heat radiation fins 22c are along the front-rear direction of the vehicle. . The heat dissipating fins 22c (22p, 22q) drop off when a strong external force is applied to the front of the vehicle body in an emergency in addition to dissipating the heat accumulated in the casing 22 (head-up display device main body). It plays a role of guiding the brake pedal 60.

  That is, in FIG. 8A, when a strong external force is applied to the front portion of the vehicle body in an emergency, the pedal bracket 62 that rotatably supports the brake pedal 60 on the vehicle interior front wall panel 1 (dash panel) moves to the vehicle body rear side. Then, the claw portion 64 installed at the rear end portion of the pedal bracket 62 hits the casing 22 (head-up display device main body). At this time, the claw portion 64 is slid between the outer fins 22p along the arrow Q in FIG. The inner fin 22q acts as a reinforcing member that softens the input when the slid claw 64 hits the heat conductive casing 22a (heat conductive member).

  In this way, the pedal bracket 62 and the brake pedal 60 that have moved to the rear side of the vehicle body are slid and stopped obliquely downward toward the rear side of the vehicle body, thereby preventing entry into the vehicle interior.

  It should be noted that the guide function when the brake pedal 60 is detached has been hitherto carried out by the impact bracket installed between the vehicle body strength member 4 (steering member) and the claw portion 64, and in the event of an emergency, the front part of the vehicle body When a strong external force is applied to the vehicle, the impact bracket is crushed and deformed, so that the brake pedal 60 that has fallen out is prevented from entering the vehicle interior.

  By adopting this as the configuration of the second embodiment, the role of the impact bracket can be assigned to the radiating fins 22c of the casing 22, so that the impact bracket is not necessary and an increase in weight can be avoided.

[Description of Steering Wheel Vibration Suppression Function in Embodiment 2]
A vehicle head-up display device 100b according to the second embodiment is as shown in FIG. 9A. First, a steering column 5 that supports a steering shaft 6 that serves as a rotating shaft of a steering wheel 9 so as to be rotatable is a column. It has the structure connected with the vehicle body strength member 4 via the bracket (or post bracket 40h).
On the other hand, the casing 22 (head-up display device main body) is attached to the vehicle body strength member 4 via an installation support member 40g (installed between the vehicle body strength member 4 and the vehicle compartment front wall panel 1 (dash panel)). It has a connected configuration.
The casing 22 (head-up display device main body) and the steering shaft 6 (column bracket (or post bracket 40h) to which the steering shaft 6 is fixed) are connected by a transmission bracket 8 that functions as a vibration-suppressing spring. I am doing so. Note that the transmission bracket 8 may be made of, for example, spring steel, or may be a coil spring or the like.

At this time, the casing 22 (head-up display device main body) is considered as a weight that generates vibrations in the opposite phase to the steering column 5, and is used for damping the post bracket 40 h that receives vibration input from the steering column 5. The vibration having the opposite phase to that of the steering column 5 is transmitted through the transmission bracket 8 functioning as a spring. This cancels out the vibration, so that the vibration of the steering wheel 9 can be suppressed.
In this way, the casing 22 (head-up display device main body) and the steering column 5 are directly connected so that the mutual vibrations are directly transmitted to each other. The effect can be enhanced. Moreover, the vibration control effect can be further enhanced by the mutual mass acting via the spring.

  Note that the mass required to generate vibrations in the opposite phase to the steering column 5 is controlled by controlling the plate thickness of the casing 22 (head-up display device main body) and the rib thickness and rib height of the radiation fins 22c. can do. Further, by controlling the spring constant of the transmission bracket 8, the rigidity for generating the antiphase vibration can be controlled.

  Therefore, by adding the transmission bracket 8, the steering wheel damping function can be realized without a large increase in mass due to the addition of a weight or the like.

  This vibration suppression function will be specifically described with reference to FIG. 9B. FIG. 9B is a diagram illustrating an example in which the casing 22 (head-up display device main body) is designed to vibrate in the opposite phase of the resonance frequency f in accordance with the characteristics of the steering wheel 9 that vibrates at the resonance frequency f. The horizontal axis of each graph represents frequency, and the vertical axis represents the magnitude of vibration.

  At this time, the magnitude of the vibration at the resonance frequency f can be suppressed as shown in the lower part of FIG. 9B by the two vibrations colliding with each other via the transmission bracket 8. At this time, as shown on the left side of the lower stage of FIG. 9B, the vibration characteristics exhibiting a single peak with the magnitude of vibration at the peak being suppressed, or the magnitude of vibration at the peak time is suppressed as shown on the right side of the lower stage of FIG. 9B. It is possible to obtain a vibration characteristic exhibiting bimodality.

[Description of Moment Reduction Function of Steering Shaft 6 in Embodiment 2]
Further, as shown in FIG. 10, the vehicle head-up display device 100b according to the second embodiment has a configuration in which the vehicle body strength member 4 (steering member) is arranged at a position on the back side of the instrument panel 14 closer to the rear of the vehicle. It has become. Therefore, the vehicle body strength member 4 can be disposed in the vicinity of the center of gravity G including the steering column 5 and the steering shaft 6 (portions located in the vehicle interior) and the steering wheel (not shown). Therefore, the torsional moment acting on the vehicle body strength member 4 when the steering shaft 6 rotates in the direction of arrow S in FIG. 10 can be reduced, and the load W applied to the gravity center position G can be reduced. As a result, the vehicle body strength member 4 can be reduced in weight or weight by making it smaller or thinner than before.
The center-of-gravity position G is preferably in the range between the front and rear portions of the vehicle body strength member 4 with respect to the longitudinal direction of the vehicle.
Further, the portion of the steering column 5 and the steering shaft 6 that are located in the vehicle interior is a portion of the steering column 5 and the steering shaft 6 that is located on the rear side of the connecting portion with respect to the portion on the engine room side. More specifically, it is a portion between the steering wheel and the intermediate shaft (that is, between the steering wheel and the first universal joint located forward of the vehicle). In the case of the steering-by-wire system, since the intermediate shaft is not used, only the portion located in the vehicle interior is provided.
The rear brackets 40e and 40f (first erection support member) may be formed longer than the front bracket 40d (second erection support member). The rear brackets 40e and 40f (first erection support member) may have the shock absorbing part 110 at the intermediate part thereof. The shock absorbing portion 110 can be a bent shape portion provided at an intermediate portion of the rear bracket 40f (first erection support member). One or a plurality of bent portions can be provided.

  (1) As described above, according to the vehicle body mounting structure of the vehicle head-up display device 100a according to the first embodiment, the casing 22 (partly formed of the heat conductive casing 22a (heat conductive member)) The head-up display device main body) includes rear-side brackets 40e and 40f (first erection support members) installed between the heat conductive case 22a and the vehicle body strength member 4 (steering member), and a heat conductive case. The front side bracket 40d (second installation support member) installed between the front wall panel 1 (dash panel) 22a and the vehicle compartment front wall panel 1 (dash panel) is fixed (fastened to be thermally conductive). At least one of the rear brackets 40e and 40f (first erection support member) and the front bracket 40d (second erection support member) is a member having thermal conductivity. Therefore, without using a special heat radiating member such as a heat radiating fin, the heat accumulated in the casing 22 is radiated through the thermal conductivity of the rear brackets 40e and 40f and the front bracket 40d. be able to. Therefore, the casing 22 for generating a display image can be reduced in size and weight, and the degree of freedom in layout of the casing 22 inside the instrument panel 3 can be improved. Can be installed in a wide range of vehicles. The rear brackets 40e and 40f (first erection support member) and the front bracket 40d (second erection support member) have at least the rear brackets 40e and 40f (first erection support member) to be thermally conductive. It is preferable to have a member. This is because the front bracket 40d (second erection support member) is connected to the vehicle compartment front wall panel 1 (dash panel), so that the temperature in the engine room where the heat source such as the engine is present rises. When the temperature of the front wall panel 1 (dash panel) itself rises, it becomes difficult to release heat to the front wall panel 1 (dash panel), whereas the rear brackets 40e and 40f (first support members) ) Is connected to the vehicle body strength member 4 (steering member) installed in the passenger compartment where the temperature is substantially constant and stable, so that heat can be stably released to the vehicle body strength member 4 (steering member). Because.

  (2) Also, according to the vehicle body mounting structure of the vehicle head-up display device 100b according to the second embodiment, the rear bracket 40f (first erection support member) is attached to the heat conductive casing 22a (heat conduction member). It may be fixed (fastened) to the attached bracket 22f (attachment support member) having thermal conductivity. Therefore, the heat dissipation member can be made unnecessary while diverting the casing fastening structure of the comparative example.

  (3) Furthermore, according to the vehicle body mounting structure of the vehicle head-up display device 100b according to the second embodiment, the rear bracket 40e (first erection support member) and the front bracket 40d (second erection support member) Are integrally formed as a construction support member 40g (support member), and the casing 22 (the heat conductive casing 22a (heat conduction member) of the head-up display device main body) is fastened and fixed to an intermediate portion of the construction support member 40g. You may be made to do. Therefore, the heat dissipation member can be made unnecessary while diverting the casing fastening structure of the comparative example.

(4) As shown in FIG. 4B, the heat source of the vehicle head-up display device 100b is applied to the inner surface of the side wall of the casing 22 (the heat-conducting casing 22a (heat conducting member) of the head-up display device body). The rear brackets 40e, 40f (first erection support member) or the front bracket 40d (second erection support member) are arranged in contact with each other on the outer surface of the side wall (same surface as) of the casing 22 where the heat source is abutted. It may be fastened and fixed. Therefore, the heat of the heat source can be directly released to the rear side brackets 40e and 40f (first erection support member) or the front side bracket 40d (second erection support member) through the side wall (the inner and outer surfaces) of the casing 22. it can. The heat dissipation performance can be improved accordingly.
Here, the heat source of the vehicle head-up display device 100b is, for example, an image display unit 23a composed of a liquid crystal panel installed as a display for displaying a display image, and an illumination light source that illuminates the image display unit 23a from the back side. And so on. In the case of the DLP method or the laser method, the light source is used.

  (5) As shown in FIG. 10, the vehicle body strength member 4 (steering member) is disposed above the gravity center position G of the steering column 5 (including the steering shaft 6 and the steering wheel). G or the vicinity thereof is fixed, and the rear brackets 40e and 40f (first erection support members) are formed longer than the front bracket 40d (second erection support member), and the rear brackets 40e and 40e, 40f (first erection support member) may have an impact absorbing portion 110 at an intermediate portion thereof. Therefore, the torsional moment acting on the vehicle body strength member 4 when the steering shaft 6 rotates in the direction of arrow S in FIG. 10 can be reduced, and the load W applied to the gravity center position G can be reduced. Further, the impact absorbing portion 110 provided at the intermediate portion of the rear bracket 40f (first erection support member) which is longer than the front bracket 40d (second erection support member) is elastically deformed, whereby the steering shaft 6 is The torsional moment acting on the vehicle body strength member 4 when rotated in the direction of the arrow S in FIG. 10 can be absorbed. Further, the impact absorbing unit 110 can absorb the impact load input to the vehicle body by plastic deformation.

  While the embodiments have been described in detail with reference to the drawings, the embodiments are merely illustrative. Therefore, the present invention is not limited to the configuration of the embodiment, and it is a matter of course that changes in design and the like within a range not departing from the gist are included in the present case. For example, when a plurality of configurations are included in each embodiment, it is a matter of course that possible combinations of these configurations are included in this case even if not specifically described. In addition, in the case where a plurality of examples and modifications are disclosed as the present case, even if there is no particular description, it is possible that a possible combination of configurations across these is included in the present case. Of course. Further, the configuration depicted in the drawings is included in the present case even if there is no particular description. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

  For example, in the second embodiment, the brackets 22f and 22g (attachment support members) installed on the casing 22 (head-up display device main body) are fastened to the rear bracket 40f (first installation support member) and the installation support member 40g, respectively. In this configuration, the brackets 22f and 22g are not used, but the rear bracket 40f (first erection support member) and the erection support member 40g are directly attached to the heat conductive casing 22a (heat conduction member). The effect similar to Example 2 can be acquired also as a structure to fasten.

  In the first embodiment, an example in which a light beam for forming a virtual image is reflected on the front window 2 (translucent member) of the vehicle 10 is described. In addition, a reflection panel provided separately from the front window 2 It is good also as a structure using (separate type combiner).

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Car front panel (dash panel)
2 ..... Front window (translucent member)
3. Instrument panel 4 ... Body strength member (steering member)
22 .... Casing (Head-up display device body)
22a .... Thermally conductive housing (thermal conductive member)
22b: Resin casing 22f, 22g: Bracket (mounting support member)
40d: Front bracket (second erection support member)
40e, 40f ・ ・ ・ ・ ・ ・ Rear bracket (first erection support member)
40g ............ Installation support member (support member)
100a ..... Head-up display device 110 for vehicles ........ Shock absorber

Cross-reference of related applications

  This application claims priority based on Japanese Patent Application No. 2015-187613 filed with the Japan Patent Office on September 25, 2015, the entire disclosure of which is fully incorporated herein by reference. .

Claims (5)

A casing of a head-up display device for a vehicle is disposed between a dash panel constituting a front wall of the passenger compartment and a steering member installed on the rear side of the dash panel, and is covered with an instrument panel. And
A part of the casing is formed of a heat conductive member, and the other part of the casing is formed of resin .
The heat conduction member includes at least one first installation support member provided between the heat conduction member and the steering member;
Each of the heat conducting member and the dash panel is fixed to at least one second erection support member,
The first erection support member is a member different from the heat conduction member, and is located within the width range of the casing, and has a planar attachment portion that is in surface contact with the rear surface of the casing,
The second erection support member is a separate member from the heat conducting member, and is located within the width range of the casing, and has a planar attachment portion that is in surface contact with the front surface of the casing,
At least one of the first erection support member and the second erection support member has thermal conductivity. A vehicle body mounting structure for a head-up display device for a vehicle. A casing of a head-up display device for a vehicle is disposed between a dash panel constituting a front wall of the passenger compartment and a steering member installed on the rear side of the dash panel, and is covered with an instrument panel. And
A part of the casing is formed of a heat conducting member,
The heat conduction member includes at least one first installation support member provided between the heat conduction member and the steering member;
Each of the heat conducting member and the dash panel is fixed to at least one second erection support member,
At least one of the first support member and the second support member has thermal conductivity,
The steering member is disposed above the position of the center of gravity of the steering column, and fixes the position of the center of gravity of the steering column or the vicinity thereof.
The first erection support member is formed longer than the second erection support member,
The vehicle body mounting structure for a head-up display device for a vehicle, wherein the first erection support member has an impact absorbing portion at an intermediate portion thereof. Wherein at least one of the first bridging support member and the second bridging support member, according to claim 2, characterized in that it is fixed to the mounting support member having the heat attached thermal conductivity conductive member The vehicle-mounted structure of the vehicle head-up display device. The heat conducting member includes a first bridging support member, and said second bridging support member that is fixed to the middle part of the integrated support members to claim 2 or claim 3, characterized in The vehicle-mounted structure of the vehicle head-up display device described above. The heat source of the vehicle head-up display device is disposed in contact with the inner surface of the side wall of the casing,
The said 1st installation support member or the said 2nd installation support member is fastened and fixed to the outer surface of the side wall of the said casing with which the said heat source contact | abutted arrangement | positioning, The one of Claim 2 thru | or 4 characterized by the above-mentioned. 2. A vehicle body mounting structure for a vehicle head-up display device according to item 1.

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