Mounting structure for head-up display devices in vehicles

Abstract

To provide a mounting structure of a head-up display device to a vehicle capable of reducing displacement of a virtual image due to vibration.SOLUTION: An HUD device 1 includes a casing 70, a display 30, a plane mirror 21, a concave mirror 20 and a control section 60. The concave mirror 20 is rotatably supported by the casing 70. In a mounting structure 101 of the HUD device 1 to a vehicle, a first elastic member 42 and a second elastic member 43 are provided to reduce displacement of a virtual image due to vibration. The first elastic member 42 is provided between a projection part 41 provided in the casing 70 and a vehicle body structure 100. The second elastic member 43 is provided between a rear surface (surface on a side that is not a reflection surface) of the concave mirror 20 and an inner surface of the casing 70.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an attachment structure of a head-up display device to a vehicle.

Background Art

[0002] A head-up display device that is attached to a vehicle and projects light from a display onto a windshield to display vehicle driving information and the like as a virtual image in front of (outside the vehicle) the windshield to a driver is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional head-up display device, vibration (vibration not synchronized with the vibration of the vehicle) may occur in the vehicle due to rattling or the like in the attachment structure to the vehicle, and the virtual image to be displayed may be blurred. When virtual image blur occurs, vehicle driving information and the like displayed as a virtual image cannot be accurately read, which hinders the driver's driving.

[0005] Therefore, an object of the present invention is to provide an attachment structure of a head-up display device to a vehicle that can reduce virtual image blur caused by vibration.

Means for Solving the Problems

[0006] The present invention relates to a mounting structure for a head-up display device to a vehicle, characterized in that an elastic member is provided between the housing of the head-up display device and the vehicle, the housing comprises a lower case and an upper case assembled together, a protrusion is provided on the lower case, and the elastic member is attached to the protrusion. The present invention relates to a mounting structure for a head-up display device to a vehicle, characterized in that an elastic member is provided between the housing of the head-up display device and the vehicle, in contact with the housing, a bracket is provided on the housing that is bolted to the vehicle, and the elastic member is provided between the bracket and the vehicle. 。 [Effects of the Invention]

[0007] According to the present invention, vibrations that are not synchronized with vehicle vibrations can be suppressed in the head-up display device, thereby reducing virtual image blur. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram illustrating the mounting configuration of a head-up display device according to one embodiment of the present invention. [Figure 2] Figure 1 is a schematic diagram showing the mounting structure of the head-up display device to a vehicle. [Figure 3] Figure 2 is a perspective view of the head-up display device. [Figure 4] Figure 3 is a perspective view of the head-up display device from a different angle. [Figure 5] Figure 4 is an explanatory diagram illustrating the mounting structure of the head-up display device to a vehicle. [Figure 6] Figure 5 is an exploded view of the head-up display device. [Modes for carrying out the invention]

[0009] A "mounting structure for a head-up display device on a vehicle" according to one embodiment of the present invention will be described with reference to Figures 1 to 6.

[0010] Figure 1 is a schematic diagram illustrating the mounting configuration of a head-up display device (hereinafter referred to as "HUD device") 1 according to one embodiment of the present invention. As shown in Figure 1, the HUD device 1 is housed inside the instrument panel of the vehicle C and projects display light 10 onto the windshield Ws, thereby displaying vehicle driving information and the like as a virtual image 90 in front of the windshield Ws (outside the vehicle) to the driver.

[0011] Figure 2 is a schematic diagram showing the mounting structure 101 of the HUD device 1 shown in Figure 1 to the vehicle C. Reference numeral 100 in Figure 2 indicates the vehicle body structure inside the instrument panel. Figures 3 to 5 are external views of the HUD device 1, and Figure 6 is an exploded view of the HUD device 1.

[0012] As shown in Figure 2, the HUD device 1 comprises a housing 70, a display unit 30, a flat mirror 21, a concave mirror (corresponding to a "reflective member") 20, and a control unit 60. Furthermore, as shown in Figure 6, the HUD device 1 also comprises a pair of support members 23 that rotatably support the concave mirror 20, and a rotating means 24 that applies rotational force to the concave mirror 20. The display unit 30 can be, for example, a liquid crystal display. The control unit 60 controls the display unit 30 and the rotating means 24.

[0013] As shown in Figures 3-5, the housing 70 comprises a lower case 40 and an upper case 50 assembled together, and a cover material 81 that closes an opening 80 formed in the upper case 50. When the housing 70 is attached to the vehicle C, the lower case 40 is located on the lower side and the upper case 50 is located on the upper side. The lower case 40 and upper case 50 are made of light-shielding synthetic resin, and the cover material 81 is made of light-transmitting synthetic resin.

[0014] The lower case 40 is provided with multiple brackets 45 that are bolted to the vehicle body structure 100. Reference numeral 45a in Figure 6 indicates a bolt insertion hole. The lower case 40 is also provided with a columnar projection 41 that protrudes downward.

[0015] The display unit 30, the flat mirror 21, and the control unit 60 are housed within the housing 70 and fixed to the housing 70. A portion of the display unit 30 is located outside the lower case 40. The concave mirror 20 is housed within the housing 70 and is rotatably supported by the lower case 40 via the pair of support members 23.

[0016] The concave mirror 20 will now be described in more detail. The concave mirror 20 has a rectangular plate-shaped main body 20a and a pair of shaft portions 20b protruding from both ends of the main body 20a. The main body 20a has a concave reflective surface facing the flat mirror 21. The pair of shaft portions 20b are rotatably supported by a pair of support members 23. The dashed line P in Figure 6 represents the rotation center of the concave mirror 20. The pair of support members 23 are bolted to the inside of the lower case 40. The rotating means 24 includes a motor, a gear that transmits the rotational force of the motor to the shaft portions 20b, etc.

[0017] As shown in Figure 2, the display unit 30 emits display light 10 toward the flat mirror 21. This display light 10 is reflected by the flat mirror 21, then reflected by the concave mirror 20, and transmitted through the cover material 81 to be projected onto the windshield Ws of the vehicle C. Then, as shown in Figure 1, the display light 10 reflected by the windshield Ws is directed toward the driver's eyes in the driver's seat. The driver perceives the display light 10 that enters their eyes as a virtual image 90 displayed in front of the windshield Ws (on the outside of the vehicle).

[0018] This HUD device 1 can change the projection position of the display light 10 on the windshield Ws according to the line-of-sight height of the driver sitting in the driver's seat. When the driver operates an operation unit (not shown), the control unit 60 drives the rotating means 24 according to the operation signal from the operation unit, and rotates the concave mirror 20. As a result, the projection position of the display light 10 on the windshield Ws is changed.

[0019] In the mounting structure 101 of such a HUD device 1 to the vehicle C, in order to reduce the virtual image blur caused by vibration, as shown in FIGS. 2, 5, 6, etc., a first elastic member 42, a second elastic member 43, and a third elastic member 44 are provided. These are made of materials capable of elastic compression and elastic return, and for example, sponge, urethane foam, etc. can be adopted.

[0020] The first elastic member (corresponding to the "elastic member") 42 is provided between the protruding portion 41 provided on the lower case 40 and the vehicle body structure 100. In this example, the first elastic member 42 is attached to the protruding portion 41, but it may be attached to the vehicle body structure 100. Attachment means such as an adhesive, an adhesive tape, etc. can be adopted. The first elastic member 42 is formed in a sheet shape, and the entire area of one surface is in contact with the protruding portion 41, and the entire area of the other surface is in contact with the vehicle body structure 100.

[0021] The second elastic member 43 is provided between the back surface of the concave mirror 20 (the surface on the side other than the reflecting surface) and the inner surface of the lower case 40. In this example, the second elastic member 43 is attached to the inner surface of the lower case 40, but it may be attached to the back surface of the concave mirror 20. Attachment means such as an adhesive, an adhesive tape, etc. can be adopted. The second elastic member 43 is formed in a sheet shape, and the entire area of one surface is in contact with the inner surface of the lower case 40, and the entire area of the other surface is in contact with the back surface of the concave mirror 20. Also, the second elastic member 43 is in contact with the inner surface of the lower case 40 and the back surface of the concave mirror 2 everywhere within the rotatable range of the concave mirror 20 (that is, no matter where the concave mirror 20 is located within the rotatable range).

[0022] The third elastic member (corresponding to the "elastic member") 44 is provided between the bracket 45, which is provided on the lower case 40, and the vehicle body structure 100. The third elastic member 44 is formed in an annular shape and is positioned on the outer circumference of the bolt insertion hole 45a. When a bolt is passed through the bolt insertion hole 45a and fastened to the vehicle body structure 100, the third elastic member 44 is in a compressed state and in contact with the bracket 45 and the vehicle body structure 100.

[0023] The first elastic member 42 and the third elastic member 44 suppress vibrations of the housing 70 relative to the vehicle C due to vibrations from the vehicle C. That is, they suppress vibrations on the housing 70 side that are not synchronized with the vibrations of the vehicle C. The second elastic member 43 suppresses vibrations of the concave mirror 20 relative to the housing 70 due to vibrations from the vehicle C and the driving of the rotating means 24. As a result, virtual image blur can be reduced. In addition, the first elastic member 42 is provided near the center of gravity of the HUD device 1, and not only reduces vibrations but also stabilizes the installation balance of the HUD device 1 mounted on the vehicle C.

[0024] Furthermore, since the mounting structure 101 allows for adjustment of the shape, size, and contact range of the protruding portion 41 and the elastic members 42, 43, and 44 to match the vehicle body structure 100, it is possible to implement countermeasures against virtual image blur in a wide range of vehicles. In addition, although the parts that come into contact with each of the elastic members 42, 43, and 44 have different hardnesses, it is possible to design countermeasures against virtual image blur tailored to the parts that come into contact with them by adjusting the hardness of each elastic member 42, 43, and 44.

[0025] In this example, multiple elastic members 42, 43, and 44 are provided, but it is sufficient to provide at least the first elastic member 42. By providing the second elastic member 43 and the third elastic member 44 in addition to the first elastic member 42, virtual image blur can be further reduced, and at the same time, these elastic members 42, 43, and 44 can accelerate vibration convergence.

[0026] The embodiments described above merely represent typical forms of the present invention, and the present invention is not limited to these embodiments. That is, it can be implemented with various modifications without departing from the core principles of the present invention. As long as such modifications still possess the configuration of the present invention, they are of course included within the scope of the present invention. [Explanation of symbols]

[0027] 1. Head-up display device 10 display light 20. Concave mirror (reflective material) 21 Flat mirror 30 Display 40 Lower Cases 41 Protrusion 42 First elastic member (elastic member) 43. Second Elastic Member 44 Third elastic member (elastic member) 45 Bracket 50 Upper Case 70 cabinets 100 Body structure 101 Mounting structure for head-up display device in a vehicle C Vehicle Ws Windshield

Claims

1. A mounting structure for a head-up display device in a vehicle, An elastic member is provided between the housing of the head-up display device and the vehicle, in contact with them. The housing comprises a lower case and an upper case assembled together, The lower case is provided with a protrusion, and the elastic member is attached to the protrusion. A mounting structure for a head-up display device to a vehicle, characterized by the following features.

2. A mounting structure for a head-up display device in a vehicle, An elastic member is provided between the housing of the head-up display device and the vehicle, in contact with them. The housing is provided with a bracket that is bolted to the vehicle, The elastic member is provided between the bracket and the vehicle. A mounting structure for a head-up display device to a vehicle, characterized by the following features.

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