JP7147609B2 - Vehicle mounting structure of virtual image display device - Google Patents

Description

The present invention relates to a structure for mounting a virtual image display device on a vehicle body.

As a conventional virtual image display device, for example, one described in Patent Document 1 is known. The virtual image display device (head-up display device) of Patent Document 1 is arranged in a space formed between the vehicle cowl, the instrument panel, and the cowl toe breath. A fixing member is provided so as to protrude from the left and right side wall portions of the virtual image display device, and this fixing member is fixed to a bracket provided on the cowl toe brace. The fixed member is intentionally provided with a groove as a weakened portion in advance, and the portion provided with the groove is a thin portion in which the thickness is partially reduced.

When a predetermined impact load is applied to the front window at the time of collision with a pedestrian, the cowl and instrument panel are deformed and part of the cowl and instrument panel moves downward in the vehicle body. When a predetermined external force is applied to the virtual image display device due to the movement of the cowl and the instrument panel, the fixing member breaks at the groove (thin portion), the fixed state is released, and the virtual image display device moves within the space. is now possible. As a result, in the event of a pedestrian collision, the front window, cowl, and instrument panel can move downwards without being blocked by the virtual image display device, enabling them to perform their impact-absorbing functions. ing.

JP 2010-64709 A

However, in Patent Document 1, although the strength against vibration during normal running of the vehicle is maintained, since grooves (weak portions) are provided in the fixing member, vibration resistance strength and rigidity are basically lowered. . Therefore, when the vehicle vibrates in the vertical direction, the virtual image display device shakes, and the display on the front window also shakes.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a structure for mounting a virtual image display device on a vehicle body, which is capable of exhibiting a shock absorbing function without lowering basic vibration resistance strength and rigidity.

The present invention adopts the following technical means in order to achieve the above objects.

In the first invention, a space (40) formed by an instrument panel (20) provided in a vehicle body (1) and a partition wall (30) separating an engine room (2) and a vehicle compartment (3) A mounting portion (111) provided in a housing (110) forming a main body portion is fixed by a bolt (60) to a bracket portion (50) provided in the vehicle body, and is attached to an opening (21) of the instrument panel. ), the display light is emitted toward the projection member (10) of the vehicle body, so that the display light reflected by the projection member is viewed as a virtual image (10b) by the viewer.
The mounting portion is provided with a notch (113) connected to the mounting hole (112) through which the bolt is inserted and opened forward of the vehicle body to enable movement of the mounting portion with respect to the bolt in the event of a pedestrian collision. and
The mounting portion and the bracket portion are provided so as to incline downward from the front side to the rear side of the vehicle body, and the mounting portion is placed on the upper side surface of the bracket portion,
A hook portion (115) for hooking onto the bracket portion is provided at the front end portion of the mounting portion .

According to this invention, during normal running, the mounting portion (111) is firmly fixed to the bracket portion (50) by the bolt (60). On the other hand, when a pedestrian collides, the instrument panel (20) and the partition wall (30) are deformed (collapsed) by the impact load (F), moving from the front side to the rear side of the vehicle body (1). By moving, it exerts a shock absorption function. Then, due to the external force directed toward the rear side at this time, the mounting portion (111) slides out of the bolt (60) through the cut portion (113) and falls off the bracket portion (50) (shock force). exertion of absorption function).

Therefore, a virtual image display device capable of exerting a shock absorbing function together with the instrument panel (20) and the partition wall (30) at the time of collision with a pedestrian without a decrease in the basic vibration resistance strength and rigidity during normal driving. It can be a vehicle body mounting structure.

It should be noted that the reference numerals in parentheses of the above means indicate the corresponding relationship with specific means described in the embodiments to be described later.

FIG. 4 is an explanatory diagram showing a state in which the virtual image display device is mounted on a vehicle; 1 is a perspective view showing the appearance of a virtual image display device according to a first embodiment; FIG. FIG. 3 is a sectional view showing III-III in FIG. 2; It is an explanatory view showing the direction in which the mounting portion comes off when a pedestrian collides. FIG. 11 is a perspective view showing the appearance of a virtual image display device according to a second embodiment; FIG. 6 is a sectional view taken along line VI-VI in FIG. 5; It is an explanatory view showing the direction in which the mounting portion comes off when a pedestrian collides. It is explanatory drawing which shows the force which acts on a slope part at the time of a pedestrian collision. It is explanatory drawing which shows the stop wall in 3rd Embodiment. It is explanatory drawing which shows the moving wall in 4th Embodiment. 4 is a flow chart showing control contents for a moving wall. It is a perspective view which shows the bracket cut part in 5th Embodiment.

A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each form, the same reference numerals may be given to the parts corresponding to the matters described in the preceding form, and overlapping explanations may be omitted. When only a part of the configuration is described in each form, the previously described other forms can be applied to other parts of the configuration. Not only combinations of parts that are explicitly stated that combinations are possible in each embodiment, but also partial combinations of embodiments even if they are not explicitly stated unless there is a particular problem with the combination. is also possible.

(First embodiment)
A vehicle mounting structure of the virtual image display device 100 according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. As shown in FIG. 1, the virtual image display device 100 is installed in a vehicle such as an automobile. The virtual image display device 100 is accommodated in a space 40 formed by an instrument panel 20 provided in the vehicle body 1 and a cowl 30 that separates the engine room 2 and the vehicle interior 3 . The cowl 30 corresponds to the bulkhead of the present invention.

The virtual image display device 100 has a display device, a plane mirror, a concave mirror, and the like housed in a housing 110 (casing). forming.

In the virtual image display device 100, display light representing display information emitted from the display device is reflected by a plane mirror and a concave mirror, and is transmitted through the opening of the housing 110 and the opening 21 formed in the instrument panel 20. The light is made incident on the projection position 10a of the windshield 10 provided on the vehicle body 1 (solid line arrow in FIG. 1). Then, the virtual image display device 100 forms a display image of the display information on the front extension line of the vehicle (in front of the windshield 10) of the line connecting the driver (viewer) and the projection position 10a, thereby displaying the display image. The virtual image 10b is visually recognized by the driver. The windshield 10 corresponds to the projection member of the invention.

With this virtual image display device 100, the driver can visually recognize the displayed image and the foreground of the vehicle in a superimposed manner. Such a virtual image display device 100 is called a head-up display device 100, and hereinafter referred to as a "HUD device 100".

As shown in FIG. 2, the housing 110 in the HUD device 100 is made of resin material, for example. A plurality of (here, three) mounting portions 111 are integrally formed on side surfaces 110a, 110b, and 110c of the housing 110 so as to form a plate shape and protrude in the horizontal direction.

As shown in FIG. 4, the mounting portion 111 has a mounting hole 112 through which the mounting bolt 60 is inserted, and the mounting portion 111 is connected to the mounting hole 112 and opens to the front side of the vehicle (the vehicle body 1). A notch 113 is provided.

The cut width dimension of the cut portion 113 is set to the same dimension as the inner diameter of the mounting hole 112 . Cut portion 113 extends from mounting hole 112 toward the front side of the vehicle to an end portion of mounting portion 111 . The mounting hole 112 and the notch 113 are notches forming an elongated U shape.

As shown in FIGS. 1 and 3, the vehicle body 1 is provided with a bracket portion 50 for mounting the HUD device 100 thereon. The bracket portion 50 is a plate-like member made of metal, and is provided with a downwardly bent flange portion at an end portion thereof in the vehicle front-rear direction. A bracket hole 51 is formed in the flat surface of the bracket portion 50 . A head portion of a bolt 60 inserted through the bracket hole 51 is joined to the rear surface side of the bracket portion 50 . In other words, the bolt 60 is joined to the bracket part 50 so that the head is located on the lower side and the screw part faces upward.

The mounting portion 111 of the housing 110 is placed on the upper surface of the bracket portion 50 so that the threaded portion of the bolt 60 is inserted into the mounting hole 112, and the nut 70 is fastened to the threaded portion of the bolt 60. . The mounting portion 111 is fixed to the bracket portion 50 by a nut 70 under a predetermined compression.

In the HUD device 100 of the present embodiment, the attachment portion 111 is firmly fixed to the bracket portion 50 by the bolt 60 and the nut 70 during normal running. Although the attachment portion 111 is provided with the notch portion 113, it does not involve a decrease in basic vibration resistance strength and rigidity.

On the other hand, when a pedestrian collides, the instrument panel 20 and the cowl 30 are deformed (collapsed) by the impact load F (FIG. 1) and move from the front upper side of the vehicle body 1 to the rear lower side. and has a shock absorbing function. 4, the attachment portion 111 slides out of the bolt 60 through the cut portion 113 due to the external force directed to the rear and lower side at this time, and falls off from the bracket portion 50 (shock force). exertion of absorption function).

Therefore, the vehicle body mounting structure of the HUD device 100 that can exhibit the shock absorbing function together with the instrument panel 20 and the cowl 30 at the time of collision with a pedestrian without a decrease in the basic vibration resistance strength and rigidity during normal driving. can do.

(Second embodiment)
5 to 8 show the vehicle body mounting structure of the HUD device 100A of the second embodiment. 100 A of HUD apparatuses of 2nd Embodiment should change the shape of the attachment part 111 with respect to the HUD apparatus 100 of the said 1st Embodiment.

As shown in FIGS. 5 and 6 , a plurality of mounting portions 111 (two on each side, four in total) are provided on side surfaces 110 a and 110 b of the housing 110 . The mounting portion 111 has a plate shape and is provided so as to incline downward from the front side of the vehicle toward the rear side. A hook portion 115 for hooking onto the bracket portion 50 is provided at the end portion of the mounting portion 111 on the front side of the vehicle.

As shown in FIG. 7, the cut width dimension of the cut portion 113 in the mounting portion 111 is set smaller than the inner diameter of the mounting hole 112 . Furthermore, the width of the cutout portion 113 is formed so as to gradually decrease from the mounting hole 112 toward the front side of the vehicle, and the midway portion of the cutout portion 113 forms a slope portion 114 .

As shown in FIG. 8, when the force in the direction of removal of the bolt 60 during normal running is Pn, the material strength of the mounting portion 111 is S, and the inclination angle of the slope portion 114 is θ, the slope portion 114 (notch portion 113) is formed. teeth,
Pn·sin θ<S
is set to be

Further, when Pc is the force in the exit direction due to the external force at the time of pedestrian collision, the slope portion 114 is
Pc·sin θ>S
is set to be Therefore, the slope portion 114 is set so as to be deformed so that the mounting portion 111 can move with respect to the bolt 60 or to be broken by hitting the bolt 60 when receiving an external force at the time of collision with a pedestrian.

As shown in FIG. 6, the bracket portion 50 is inclined in the same manner as the attachment portion 111, and has a bracket hole 51 formed at the center position. A nut 70 is joined to the rear side surface of the bracket portion 50 so as to correspond to the bracket hole 51 .

Mounting portion 111 is placed on the upper side surface of bracket portion 50 , and bolt 60 is inserted through mounting hole 112 and bracket hole 51 and fastened to nut 70 . The mounting portion 111 is fixed to the bracket portion 50 by a bolt 60 under a predetermined compression. Since the mounting portion 111 is inclined, the tightening direction (axis) of the bolt 60 is inclined toward the rear side of the vehicle with respect to the vertical direction.

In this embodiment, a slope portion 114 is formed in the cut portion 113 of the mounting portion 111 . As a result, the slope portion 114 prevents the attachment portion 111 from coming off from the bolt 60 during normal running, so that the attachment portion 111 can be fixed more firmly. In addition, when a pedestrian collides, the mounting portion 111 can be easily removed from the bracket portion 50 by deforming or breaking the slope portion 114 due to a force (external force) in the removal direction.

Therefore, the vehicle body mounting structure of the HUD device 100A that can exhibit the shock absorbing function together with the instrument panel 20 and the cowl 30 at the time of collision with a pedestrian without a decrease in the basic vibration resistance strength and rigidity during normal driving. can do.

(Third embodiment)
A third embodiment is shown in FIG. 3rd Embodiment shall provide the stop wall 120 in the bracket part 50 with respect to said 1st Embodiment.

The stop wall 120 is made of, for example, a resin material, is adjacent to the mounting portion 111 on the vehicle rear side, and is fixed to the bracket portion 50 so as to extend in the left-right direction of the vehicle. The stop wall 120 protrudes upward from the upper surface of the bracket portion 50 by approximately the same thickness as the mounting portion 111 . The stopping wall 120 has a strength set so that it restricts the movement of the mounting portion 111 during normal running, and is broken when the moving mounting portion 111 hits it in the event of a collision with a pedestrian.

As a result, during normal running, the mounting portion 111 is positionally regulated by the stop wall 120 to prevent it from coming off the bolt 60, so that the mounting portion 111 can be fixed more firmly. In addition, in the event of a pedestrian collision, when the attachment portion 111 moves so as to come off the bolt 60, it hits the stop wall 120 and breaks the stop wall 120, thereby easily dropping the attachment portion 111 from the bracket portion 50. be able to.

Therefore, the vehicle body mounting structure of the HUD device can exhibit the shock absorbing function together with the instrument panel 20 and the cowl 30 at the time of collision with a pedestrian without accompanying a decrease in the basic vibration resistance strength and rigidity during normal driving. be able to.

(Fourth embodiment)
A fourth embodiment is shown in FIGS. 10 and 11. FIG. 4th Embodiment replaces the stop wall 120 in the said 3rd Embodiment with the movable wall 120a which can be moved. An actuator 121, a sensor section 122, a control section 123, and the like are provided to move the moving wall 120a.

As shown in FIG. 10, the moving wall 120a is a plate-like member, and is inserted through a lower hole 51a provided in the bracket portion 50 so as to be movable. An end of the moving wall 120 a that is on the back side (lower side) of the bracket portion 50 is connected to the actuator 121 .

For example, a solenoid is used as the actuator 121, and when the solenoid is energized, an electromagnetic force is generated to move the moving wall 120a. The actuator 121 can move the moving wall 120a in the horizontal direction (actually, the vertical direction) in FIG. 10(b). Actuator 121 corresponds to the moving part of the present invention. Incidentally, the actuator 121 is not limited to a solenoid, and may be one using a drive unit such as another motor.

The sensor unit 122 is a detection unit that detects the occurrence of a pedestrian collision. The sensor unit 122 uses, for example, a G sensor, and outputs a collision signal (generated G signal) to the control unit 123 when a pedestrian collision occurs.

The control unit 123 is a part that operates the actuator 121 by changing the energization state of the actuator 121 and controls the position of the moving wall 120a.

Next, the point of the position control of the moving wall 120a performed by the control unit 123 will be described with reference to the flowchart shown in FIG.

First, in step S100, the control unit 123 causes the actuator 121 to project the position of the moving wall 120a from the prepared hole 51a and set it to a position corresponding to (opposing to) the mounting portion 111 (corresponding to normal running). ).

Next, in step S110, the control unit 123 determines whether or not a collision signal has been generated from the sensor unit 122. If the controller 123 determines that no collision signal has been generated, it repeats step S100, and if it determines that a collision signal has been generated, it proceeds to step S120.

In step S<b>120 , the controller 123 causes the actuator 121 to lower the movable wall 120 a so as to enter the pilot hole 51 a and move the movable wall 120 a away from the position corresponding to the mounting portion 111 .

As a result, during normal running, the mounting portion 111 can be prevented from falling out of the bolt 60 by hitting the moving wall 120a, so that the mounting portion 111 can be fixed more firmly. In addition, when a pedestrian collides, the moving wall 120a is moved by the control unit 123 so as to deviate from the position corresponding to the mounting portion 111. Therefore, the positional restriction on the mounting portion 111 by the moving wall 120a is eliminated, and the vehicle can be easily moved. The attachment portion 111 can be removed from the bracket portion 50 .

Therefore, the vehicle body mounting structure of the HUD device can exhibit the shock absorbing function together with the instrument panel 20 and the cowl 30 at the time of collision with a pedestrian without accompanying a decrease in the basic vibration resistance strength and rigidity during normal driving. be able to.

(Fifth embodiment)
In the first to fourth embodiments, the mounting portion 111 is provided with the notch 113, but as shown in FIG.

The bracket cutout portion 52 is connected to the bracket hole 51 of the bracket portion 50 and opens to the rear side of the vehicle body 1 . The cut width dimension of the bracket cut portion 52 is set to the same dimension as the inner diameter of the bracket hole 51 and extends from the bracket hole 51 toward the rear side of the vehicle to the end portion of the bracket portion 50 . The bracket hole 51 and the bracket cut portion 52 are notch portions that form an elongated U shape. A nut 70 for fastening the bolt 60 is not joined to the bracket portion 50 .

Accordingly, during normal running, the mounting portion 111 is firmly fixed to the bracket portion 50 by the bolt 60 and the nut 70 . On the other hand, when a pedestrian collides, the instrument panel 20 and the cowl 30 are deformed (collapsed) by the impact load F, and move from the front side to the rear side of the vehicle body 1 (exhibition of the impact absorbing function). . At this time, the mounting portion 111, the bolt 60, and the nut 70 are slidably removed from the bracket portion 50 by the bracket cut portion 52 due to the external force directed toward the rear side, and fall off (shock absorption). performance).

Therefore, the vehicle body mounting structure of the HUD device can exhibit the shock absorbing function together with the instrument panel 20 and the cowl 30 at the time of collision with a pedestrian without accompanying a decrease in the basic vibration resistance strength and rigidity during normal driving. be able to.

(Other embodiments)
In the above-described embodiments, the windshield 10 of the vehicle is used as the projection member for the display light emitted from the HUD devices 100 and 100A.

Further, in each of the above-described embodiments, the HUD devices 100 and 100A have the plane mirror and the concave mirror as the reflecting portions, but for example, only the concave mirror may be used.

1 car body (vehicle)
2 engine room 3 cabin 10 windshield (projection member)
10b virtual image 20 instrument panel 21 opening 30 cowl (partition)
40 space portion 50 bracket portion 51 bracket hole 52 bracket notch portion 60 bolt 100, 100A virtual image display device (head-up display device)
110 housing 111 mounting portion 112 mounting hole 113 notch portion 114 slope portion 120 stop wall 120a moving wall 121 actuator (moving portion)
122 sensor unit 123 control unit

Claims (4)

It is housed in a space (40) formed by an instrument panel (20) provided in the vehicle body (1) and a partition wall (30) that separates the engine compartment (2) and the vehicle compartment (3). is fixed by bolts (60) to a bracket (50) provided on the vehicle body, through an opening (21) of the instrument panel. In a vehicle body mounting structure of a virtual image display device that emits display light toward a projection member (10) of the vehicle body so that a viewer can view the display light reflected by the projection member as a virtual image (10b),
The mounting portion has a notch (112) connected to the mounting hole (112) through which the bolt is inserted and opened forward of the vehicle body to enable movement of the mounting portion with respect to the bolt in the event of a pedestrian collision. 113) is provided ,
The mounting portion and the bracket portion are provided so as to incline downward from the front side to the rear side of the vehicle body, and the mounting portion is placed on the upper side surface of the bracket portion,
A structure for mounting a virtual image display device on a vehicle body, wherein a hook portion (115) for hooking onto the bracket portion is provided at the front end portion of the mounting portion . The cut portion is formed with a slope portion (114) in which the width dimension of the cut portion gradually decreases toward the front side of the vehicle body,
The slope portion is set so as to be deformed so as to allow the movement of the mounting portion with respect to the bolt, or to be broken by hitting the bolt due to an external force (Pc·sin θ) at the time of collision with the pedestrian. 2. Vehicle body mounting structure of the virtual image display device according to 1. A stop wall (120) fixed to the bracket portion is provided on the rear side of the vehicle body of the mounting portion,
3. The virtual image according to claim 1, wherein the stop wall restricts the movement of the mounting portion during normal running, and is set so as to be broken by being hit by the moving mounting portion when the vehicle collides with the pedestrian. Vehicle body mounting structure of the display device. a moving wall (120a) provided movably with respect to the mounting portion on the rear side of the vehicle body of the mounting portion;
a moving part (121) for moving the moving wall;
a sensor unit (122) that detects the occurrence of the pedestrian collision;
During normal running, the moving wall is moved to a position corresponding to the mounting portion, and based on a collision signal from the sensor portion at the time of collision with the pedestrian, the moving wall is moved from the position corresponding to the mounting portion. 3. The vehicle body mounting structure for a virtual image display device according to claim 1, further comprising a control unit (123) for moving the virtual image display device so as to be disengaged.

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