JP2019162903A - Mirror movable mechanism of head-up display device - Google Patents

Abstract

To achieve improvement of assemblability of wiring mainly.SOLUTION: The invention relates to a mirror movable mechanism 36 of a head-up display device 2 which connects an actuator 38 to a mirror 6 through a driving force transmission part 36a to form a mirror 6 in a rotatable manner. An attachment bracket 40 attached to the actuator 38 has an engagement part 83 which may engage and hold wiring to be connected to the actuator 38. A partition wall 84 is provided between the engagement part 83 and the driving force transmission part 36a.SELECTED DRAWING: Figure 3A

Description

  The present invention relates to a mirror moving mechanism of a head-up display device.

  In recent years, mounting a head-up display device on a vehicle such as an automobile has been promoted.

  There are various types of head-up display devices, and a display device that can display driving information and a mirror that can reflect driving information (display image) from the display device toward the front of the passenger compartment are provided. Things exist.

  In the head-up display device having such a configuration, the driving information from the display device is reflected by the mirror toward the front of the passenger compartment, thereby generating a virtual image of the driving information in front of the passenger compartment, Driving information can be visually recognized without causing a large line-of-sight movement to the occupant driving facing.

  Some head-up display devices have a mirror movable mechanism in which a mirror is configured to be rotatable by connecting an actuator to the mirror via a driving force transmission unit (see, for example, Patent Document 1).

Japanese Patent No. 5446837

  In the mirror movable mechanism, the wiring connected to the actuator has to be routed with care so as not to be caught between the driving force transmission units, and it has been troublesome to handle the wiring.

  Therefore, the present invention mainly aims to solve the above-described problems.

In order to solve the above problems, the present invention provides:
In the mirror movable mechanism of the head-up display device configured such that the mirror can be rotated by connecting an actuator to the mirror via a driving force transmission unit,
The mounting bracket attached to the actuator has a locking portion capable of locking and holding the wiring connected to the actuator, and a partition wall is provided between the locking portion and the driving force transmitting portion. It is characterized by that.

  According to the present invention, the above-described configuration can improve the assembling property of the wiring.

It is a block diagram of a head-up display apparatus. It is a perspective view of the mirror support structure and mirror movable mechanism of FIG. It is a right view of the mirror movable mechanism of FIG. It is a left view of the mirror movable mechanism of FIG. It is a rear view of the mirror movable mechanism of FIG. It is a top view of the mirror movable mechanism of FIG. FIG. 3 is a perspective view of the mirror movable mechanism (without a mirror) of FIG. 2. FIG. 3 is a perspective view of the motor and the mounting bracket of FIG. 2. FIG. 3 is a right side view of the motor and the mounting bracket of FIG. 2. FIG. 3 is a left side view of the motor and the mounting bracket of FIG. 2. FIG. 3 is a rear view of the motor and the mounting bracket of FIG. 2. It is a top view of the motor and mounting bracket of FIG. It is a perspective view of the motor of FIG. It is a right view of the motor of FIG. It is a left view of the motor of FIG. It is a rear view of the motor of FIG. It is a top view of the motor of FIG. FIG. 3 is a perspective view of the mounting bracket of FIG. 2. It is a right view of the mounting bracket of FIG. It is a left view of the mounting bracket of FIG. FIG. 3 is a rear view of the mounting bracket of FIG. 2. FIG. 3 is a plan view of the mounting bracket of FIG. 2.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 7E are for explaining this embodiment.

  <Configuration> The configuration of this embodiment will be described below.

  As shown in FIG. 1, a head-up display device 2 is mounted on a vehicle 1 such as an automobile.

  There are various types of head-up display devices 2. In this embodiment, the display device 4 that can display the driving information 3 and the driving information 3 (display image) from the display device 4 are displayed in front of the passenger compartment 1a. And a mirror 6 (reflecting member) that can be reflected toward the head.

  Here, the direction will be described with reference to a state in which the head-up display device 2 is mounted on the vehicle 1. The vehicle front-rear direction is substantially the front-rear direction X or the depth direction of the head-up display device 2, the vehicle width direction is substantially the width direction Y of the head-up display device 2, and the vertical direction of the vehicle 1 is substantially the vertical direction of the head-up display device 2. Z. However, since the head-up display device 2 may be mounted on the vehicle 1 in an inclined state, these directions may be shifted to some extent.

  The head-up display device 2 allows the occupant 7 who is driving facing the front to visually recognize the driving information 3 without causing a large line of sight movement. The head-up display device 2 is installed inside the instrument panel 12 provided in the front part of the passenger compartment 1a together with the casing 11 in a state where the display device 4 and the mirror 6 are accommodated in the casing 11. And the opening parts 13 and 14 which let the driving | running | working information 3 pass are provided in the upper surface of the casing 11 and the upper surface of the instrument panel 12. FIG. A transparent or translucent dustproof cover 15 or the like is installed in at least one of the openings 13 and 14 in a fixed state or an openable / closable state. The dust cover 15 may be flat, but may have a concave shape that is recessed downward as viewed from the side in order to prevent the dust cover 15 from being reflected on the front window 16.

  The driving information 3 passing through the openings 13 and 14 is reflected on the front window 16 or reflected on a dedicated reflector called a combiner installed on the front side of the openings 13 and 14 so that the passenger 7 It is visually recognized as a virtual image 18. In order to reflect the driving information 3, for example, a reflective film or a fine reflecting surface is provided on the front window 16 at least in a required range where the driving information 3 is projected.

  Driving information 3 is general information for driving assistance. The driving information 3 includes, for example, speed information, road information (for example, lane display, preceding vehicle display, oncoming vehicle display, pedestrian display, obstacle display, etc.), route information (for example, intersection information, Left and right turn display), destination information (for example, arrival time and mileage to the destination), traffic information, service information (for example, parking lot information, gas station information, neighboring facility information), And other indications.

  The display device 4 can use a display such as a liquid crystal panel or an organic EL panel. When a liquid crystal panel is used for the display device 4, an illumination device 4a serving as a backlight is provided on the back side of the liquid crystal panel. Further, the display device 4 may be a display device such as a projector using a DLP unit that reflects laser light with a micromirror. The display image (driving information 3) of the display device 4 is controlled by the control unit 4b.

  The passenger compartment 1a is a space in which the occupant 7 in the vehicle 1 is boarded. The mirror 6 is an optical component (reflecting member) such as a reflecting mirror. As the mirror 6, a plane mirror that reflects the operation information 3 (display image) from the display device 4 at an equal magnification, a curved mirror that reflects the enlarged image (concave mirror), or the like is used in an appropriate combination of one or a plurality (this) In the embodiment, there are two on the left and right). The mirror 6 can be directly fixed (fixed mirror) inside the casing 11 as in the right side of FIG. Further, the mirror 6 can be installed so as to be movable by a mirror support structure 20 (movable mirror) as in the left side of FIG.

  As shown in FIG. 2 (see also FIGS. 3A to 3D), the mirror support structure 20 supports the mirror 6 (at least one of them) so as to be rotatable about the rotation shafts 21 and 22. ing. The mirror support structure 20 includes rotating shafts 21 and 22 projecting from the side surface 6 a of the mirror 6, bearings 23 and 24 that support the rotating shafts 21 and 22, and the mirror 6 in the axial direction 25 of the rotating shafts 21 and 22. And an elastic member 26 that presses from one side to the other side. The axial direction 25 is installed almost horizontally in the width direction Y in a state of being mounted on the vehicle 1.

  Here, the mirror 6 has a horizontally long shape extending substantially in the width direction Y, and is rotated in a substantially vertical direction Z about the rotation shafts 21 and 22. The mirror 6 is intentionally non-rectangular or the like in order to prevent distortion in the driving information 3 when reflected on the front window 16 having a complicated three-dimensional curved surface shape.

  The side surface 6 a of the mirror 6 is a pair of opposite sides provided with the rotation shafts 21 and 22, and is, for example, a vertical side of the mirror 6. The rotary shafts 21 and 22 project from the both side surfaces 6a of the mirror 6 so as to be laterally located on the same axis. The rotary shafts 21 and 22 may be provided at any position on the side surface 6a of the mirror 6, but in this embodiment, the rotary shafts 21 and 22 are provided at an intermediate portion (in the vertical direction Z) of the side surface 6a of the mirror 6. The rotating shafts 21 and 22 may be provided separately from the mirror 6, but when the mirror 6 is made of resin, the rotating shafts 21 and 22 can be formed integrally with the mirror 6.

  The elastic member 26 is provided on one side surface 6a (pressing side) of the mirror 6 and presses and biases the mirror 6 toward the other side surface 6a (pressed side), so that the mirror 6 moves due to vehicle vibration. This prevents the driving information 3 (display image) from blurring.

  The mirror support structure 20 enables the mirror 6 to be rotated between the use position and the standby position. The use position is the position of the mirror 6 when the head-up display device 2 is used. At the use position, the display height can be adjusted so that the driving information 3 is displayed at the optimum position in accordance with the physique (or eye height) of the occupant 7, and the mirror 6 is arranged in the vertical direction. It is slightly rotated while lying relatively to Z.

  The standby position is the position of the mirror 6 when the head-up display device 2 is not used. In the standby position, the mirror 6 is in a state of standing in the vertical direction Z with respect to the use position. By setting the mirror 6 to the standby position, the external light incident on the inside of the casing 11 is not retro-reflected toward the display device 4, so that the display device 4 can be prevented from being damaged by the external light retro-reflection. Even when the head-up display device 2 is used, when the amount of external light incident on the inside of the casing 11 is large, the mirror 6 can be temporarily placed in a standby position so that the external light is not retro-reflected. In particular, when a concave mirror is used for the mirror 6, external light is collected by the concave mirror and applied to the display device 4, so that the display device 4 is greatly damaged.

  Further, the mirror 6 (movable mirror) supported by the mirror support structure 20 can be automatically moved (turned) using the mirror moving mechanism 36 (or mirror turning mechanism).

  The mirror movable mechanism 36 may be a link mechanism or a gear mechanism. In this embodiment, the mirror movable mechanism 36 includes an arm portion 37 attached to one rotary shaft 21 and an actuator 38 that rotates the rotary shaft 21 and the mirror 6 via the arm portion 37. When the mirror movable mechanism 36 is a link mechanism, the arm portion 37 is moved by an actuator 38 such as a cylinder.

  When the mirror movable mechanism 36 is a gear mechanism, the arm portion 37 is, for example, a gear such as a sector gear that extends in the radial direction of the rotating shaft 21 and has gear teeth 37a at the tip. The sector gear is formed at an angle (approximately 25 ° to 30 °) that covers at least the normal rotation range between the standby position and the use position. A motor is used for the actuator 38. The motor rotates the arm portion 37 by meshing a gear such as a drive gear 38a attached to the output shaft with the gear teeth 37a of the sector gear. Rotating members (or shaft attachment members) such as the arm portion 37 and the driving gear 38a constitute a driving force transmission portion 36a (or a driving force transmission mechanism). Contrary to the above, the arm portion 37 may be attached to the output shaft of the motor, and the drive gear 38a may be attached to the rotating shaft 21. The arm portion 37 is urged by the return spring 39 in one direction of rotation toward the use position or the standby position described above. The return spring 39 also performs loose play between the sector gear and the drive gear 38a. The motor is fixed to the casing 11 via the mounting bracket 40.

  In this embodiment, the mirror moving mechanism 36 is configured as follows for the head-up display device 2 as described above.

(1) As described above, the mirror movable mechanism 36 is configured such that the mirror 6 can be rotated by connecting the actuator 38 to the mirror 6 via the driving force transmitting portion 36a.
As shown in FIG. 4 (see also FIGS. 5A to 5E), the mounting bracket 40 attached to the actuator 38 has a locking portion 83 capable of locking and holding the wiring 82 connected to the actuator 38. Have. Further, a partition wall 84 is provided between the locking portion 83 and the driving force transmission portion 36a.

  Here, as shown in FIG. 6A to FIG. 6E, the actuator 38 is a square type, but is not limited thereto. The actuator 38 has an output shaft 38b protruding from one side surface, and a drive gear 38a is attached to the output shaft 38b.

  As shown in FIGS. 5A to 5E, the mounting bracket 40 is an auxiliary member that is attached to the actuator 38 in order to attach the actuator 38 to the casing 11. As shown in FIGS. 7A to 7E, the mounting bracket 40 is mainly configured by a substantially rectangular frame-shaped portion (frame portion 40a) that can hold the rectangular actuator 38 by external fitting. The frame portion 40a has an upper side, a bottom side, and both sides, one side being a closing surface 40b and the other side being an opening, and a hole 40c through which the output shaft 38b passes is formed in the closing surface 40b. ing.

  The wiring 82 (FIG. 4) can include a power line for supplying power to the actuator 38, a signal line for exchanging control signals with the actuator 38, and the like.

  The locking portion 83 can be, for example, a hook portion that hooks the wiring 82 from above to guide the wiring 82 connected to the actuator 38 downward. The locking portion 83 is provided in the middle of the extended portion 40d extended from the bottom side of the frame portion 40a of the mounting bracket 40 (to the mirror 6 side). A through portion 40e for guiding the wiring 82 downward is formed by a notch or the like below the locking portion 83 in the extended portion 40d. The bottom side of the frame part 40a and the extended part 40d are made wider than other parts so as to be easily attached to the casing 11 (wide part), and the lower part of the wide part is attached for pin fixing to the casing 11 You may provide suitably the pin 40f, the screw hole for screw fixing, etc. FIG. Further, a reinforcing rib or the like may be provided as appropriate between the wide portion and the other portion of the frame portion 40a.

  The partition wall 84 is a wall for partitioning between the locking portion 83 and the driving force transmission portion 36a. The partition wall 84 is integrally provided on the side surface of the mounting bracket 40 on the driving force transmission portion 36a side. The partition wall 84 is, for example, a surface parallel to the arm surface 37 and the drive gear 38a of the drive force transmission unit 36a that is flush with the closing surface 40b.

  (2) You may make it the partition wall 84 become higher than the gear meshing part 36b which comprises the driving force transmission part 36a.

  Here, the gears constituting the driving force transmitting portion 36a are the arm portion 37 and the driving gear 38a in this embodiment.

  The meshing portion 36b is a portion where the gear teeth 37a of the arm portion 37 and the drive gear 38a mesh with each other, and is located on a line connecting the center of the rotating shaft 21 and the center of the output shaft 38b.

  As shown in FIGS. 3A and 3B, the partition wall 84 has a height at which the meshing portion 36b is hidden when the mirror movable mechanism 36 is viewed from the side. The partition wall 84 is configured such that the whole or a part of the periphery of the meshing portion 36b is set to a height at which the meshing portion 36b is hidden (height of the partition wall 84> height of the meshing portion 36b). The height of the partition wall 84 and the meshing part 36b is a dimension in the vertical direction Z from the position of the bottom side of the frame part 40a. In this embodiment, the partition wall 84 is a rib (triangular rib) provided in the mounting bracket 40 between the side of the frame portion 40a on the mirror 6 side and the extended portion 40d. The partition wall 84 faces or is adjacent to at least the meshing portion 36b on the oblique side of the triangular rib (connecting the upper end of the side of the frame 40a on the mirror 6 side and the tip of the extension 40d). The portion is the same as or higher than the toothed portion 36b.

(3) The mounting bracket 40 is provided with a mounting portion 85 to which a biasing member that performs rattling of the gears constituting the driving force transmitting portion 36a can be mounted.
The partition wall 84 is a reinforcing wall 84 a that reinforces the attachment portion 85.

  Here, the urging member is the return spring 39 described above. The urging member (return spring 39) is a tension spring (coil spring) or the like.

  The attachment portion 85 is provided at the distal end portion of the extension portion 40d. The attachment portion 85 is a downward hook that locks the end portion of the biasing member. On the other hand, a mounting portion 37 b that forms a pair with the mounting portion 85 is provided in the middle portion near the upper edge of the arm portion 37. The attachment portion 37b is an upward hook that locks the opposite end of the biasing member. The urging member is interposed substantially in the vertical direction Z between the attachment portion 85 at the distal end portion of the extension portion 40 d and the attachment portion 85 of the arm portion 37.

  In order to use the partition wall 84 as the reinforcing wall 84a, the partition wall 84 can be thicker than the other portions of the mounting bracket 40 or can be provided with reinforcing ribs as necessary.

  <Operation> The operation of this embodiment will be described below.

  The head-up display device 2 reflects the driving information 3 from the display device 4 toward the front of the passenger compartment 1a by the mirror 6, thereby generating a virtual image 18 of the driving information 3 in front of the passenger compartment 1a. The driving information 3 can be visually recognized without causing the occupant 7 driving facing the front to move a large line of sight.

  At this time, by providing a mirror 6 in the middle of the optical path and bending the optical path, the driving information 3 from the display device 4 (compared to directing the driving information 3 from the display device 4 directly to the front of the passenger compartment 1a). This makes it possible to lengthen the optical path and to enlarge and display the driving information 3. As a result, the head-up display device 2 can display the driving information 3 at a distance, increase the angle of view of the driving information 3, and the like.

  The mirror 6 is supported by a mirror support structure 20 and is rotated by a mirror movable mechanism 36. At this time, the mirror movable mechanism 36 rotates the mirror 6 by transmitting the driving force of the actuator 38 to the mirror 6 via the driving force transmitting portion 36a.

  In the mirror movable mechanism 36, the wiring 82 connected to the actuator 38 at the time of assembly needs to be routed with care so as not to be sandwiched between the driving force transmission portions 36a. It was.

  <Effect> According to this embodiment, the following effects can be obtained.

  (Effect 1) A locking portion 83 is provided on the mounting bracket 40. As a result, the wiring 82 connected to the actuator 38 is locked to the locking portion 83, so that the wiring 82 is stabilized in a constant state. Therefore, it is necessary to pay attention to the wiring 82. Thus, the assembling property of the wiring 82 can be improved.

  Moreover, the partition wall 84 which partitions between the latching | locking part 83 and the driving force transmission part 36a in the attachment bracket 40 was provided. Thereby, the partition wall 84 can partition the locking portion 83 and the driving force transmission portion 36a. For this reason, the partition wall 84 restricts the wiring 82 connected to the actuator 38 from protruding toward the driving force transmitting portion 36a, and the wiring 82 is sandwiched between the driving force transmitting portions 36a (or to the gear of the driving force transmitting portion 36a). Can be prevented.

  By providing both the locking portion 83 and the partition wall 84, it is possible to have both the function of the locking portion 83 and the function of the partition wall 84. Even in the case where the arm is detached and can move, the presence of the partition wall 84 can prevent the subsequent protrusion of the wiring 82 and the pinching of the driving force transmitting portion 36a.

  (Effect 2) You may make the partition wall 84 higher than the gear meshing part 36b which comprises the driving force transmission part 36a. Thereby, the meshing portion 36 b of the gear of the driving force transmission mechanism can be physically protected by the partition wall 84. Further, by making the partition wall 84 higher than the meshing portion 36b, it becomes difficult for the wiring 82 to stick out to the side of the driving force transmitting portion 36a beyond the partition wall 84. Therefore, the wiring 82 has teeth of the driving force transmitting portion 36a. It can be prevented from being caught in the joint portion 36b. Further, even if the wiring 82 exceeds the partition wall 84, it is difficult to move toward the driving force transmitting portion 36a, so that it is possible to prevent the wiring 82 from being caught by the engaging portion 36b of the driving force transmitting portion 36a.

  At this time, by making the partition wall 84 slightly higher than the engaging portion 36b, it is possible to prevent the wiring 82 from sticking out or being pinched by the partition wall 84 having the minimum height. Furthermore, if the partition wall 84 is made sufficiently higher than the meshing portion 36b, the wiring 82 can be more reliably prevented from being caught or pinched.

  (Effect 3) A mounting portion 85 for the biasing member (return spring 39) may be provided on the mounting bracket 40. Thus, the mounting portion 85 for mounting the biasing member for rattling of the gears constituting the driving force transmission portion 36a can be provided by using the mounting bracket 40 for installing the actuator 38 on the casing 11. The mounting bracket 40 can be used effectively.

  At this time, the partition wall 84 may be a reinforcing wall 84 a for the attachment portion 85. Thereby, the rigidity required for the attachment portion 85 can be secured by the partition wall 84, the urging member can be stably attached to the attachment portion 85, and the partition wall 84 can be effectively utilized.

2 Head-up display device 6 Mirror 11 Casing 36 Mirror movable mechanism 36a Driving force transmission part 36b Intermeshing part 37 Arm part (gear)
38 Actuator 38a Drive gear (gear)
39 Return spring (biasing member)
40 Mounting bracket 82 Wiring 83 Locking portion 84 Partition wall 84a Reinforcing wall 85 Mounting portion

Claims (3)

In the mirror movable mechanism of the head-up display device configured such that the mirror can be rotated by connecting an actuator to the mirror via a driving force transmission unit,
The mounting bracket attached to the actuator has a locking portion capable of locking and holding the wiring connected to the actuator, and a partition wall is provided between the locking portion and the driving force transmitting portion. A mirror moving mechanism of a head-up display device. In the mirror movable mechanism of the head-up display device according to claim 1,
The partition movable mechanism of the head-up display device, wherein the partition wall is higher than a gear meshing portion constituting the driving force transmitting portion. In the mirror movable mechanism of the head-up display device according to claim 1 or 2,
The mounting bracket is provided with a mounting portion to which a biasing member that performs rattling of the gear constituting the driving force transmitting portion can be mounted,
The partition movable mechanism is a mirror movable mechanism of a head-up display device, wherein the partition wall is a reinforcing wall that reinforces the mounting portion.