JP2012061987A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that can drive a display and a cover by a mechanism that is compact and has a reduced number of part items.SOLUTION: In the display device, third cogs of the cover are engaged with second cogs of a cam gear at a closed position, the cover is moved from the closed position to an opened position in association with the rotation of the cam gear in a first direction and also a protrusion is pushed by an inner wall of a groove to thereby cause the display to be erected from a storing position toward a using position. The mesh between the third cogs of the cover and the second cogs of the cam gear is disengaged at the opened position and the cover is stopped, the rotation of the cam gear in the first direction or second direction opposite the first direction allows the display to be inclined from the using position, while stopping the cover at the opened position.

Description

  Embodiments described herein relate generally to a display device.

  In recent years, display information such as navigation information is projected directly on a windshield or on a display unit disposed near the windshield, and a vehicle-mounted head-up display (HUD) capable of simultaneously viewing external information and display information. Head-Up Display) is being developed.

  In the configuration in which the display unit is provided separately from the windshield, the display unit can be protected from aging and the like if the display unit can be stored and covered with a cover when not in use. From the viewpoint of effectively utilizing a limited space in the vehicle and from the viewpoint of cost reduction, it is desirable to drive the display unit and the cover with a small mechanism with a reduced number of parts.

JP 2003-39981 A

  Provided is a display device capable of driving a display unit and a cover with a small mechanism with a reduced number of parts.

  According to the embodiment, the display device includes a motor, a transmission gear coupled to the motor, a support shaft, a cam gear rotatably supported by the support shaft, a display unit, a cover, and an image. And an image light generation unit that projects a light beam onto the display unit. The cam gear includes first teeth that mesh with the transmission gear, second teeth that rotate integrally with the first teeth, and a groove that is provided along the rotation direction. The display unit is provided so as to be movable between a storage position where the display unit is in a tilted position and a use position where the display unit is in a standing position, and has a protrusion positioned in the groove. The cover is provided so as to be able to reciprocate between a closed position that covers the display unit in the storage position and an open position that opens the display unit in the use position, and can engage with the second tooth. A third tooth. In the closed position, the third tooth meshes with the second tooth, and as the cam gear rotates in the first direction, the cover moves from the closed position to the open position, and The protrusion is pushed against the inner wall of the groove, and the display unit rises from the storage position toward the use position. The engagement of the third tooth and the second tooth is disengaged in the open position, the cover is stopped, and the cam gear is stopped in the open position, and the cam gear is in the first direction or vice versa. The display portion can be tilted from the use position by rotation in the second direction.

The schematic diagram of the drive mechanism of the display part and cover in the display apparatus which concerns on embodiment. The schematic diagram which shows operation | movement of a display part and a cover. The schematic diagram which shows operation | movement of a display part and a cover. FIG. 3 is a schematic view illustrating the configuration of a display device according to an embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element in each drawing.

  The display device according to the embodiment includes, for example, a simulator such as a driving simulator and a flight simulator, in addition to HUD (Head-Up Display) mounted on a moving body such as an automobile, a bus, a rail vehicle, a ship, and an aircraft, It can also be applied to amusement applications such as games, and can provide a display superimposed on a desired position in the background.

Hereinafter, a display device used as an in-vehicle HUD will be described as an example.
FIG. 4 is a schematic view illustrating the configuration of the display device.

  The display device 70 according to the present embodiment is mounted on the vehicle 90. The display device 70 includes a display unit 31 (for example, a combiner) and an image light generation unit that projects a light beam including an image onto the display unit 31. Furthermore, as shown in FIG. 1, the display device 70 includes a cover 41 and a drive mechanism that drives the display unit 31 and the cover 41.

  The video light generation unit includes a video data generation unit 81 and a video projection unit 82. The video data generation unit 81 generates video data. The video projection unit 82 reflects the light beam including the video based on the video data generated by the video data generation unit 81 to the display unit 31 and projects the light beam toward the viewer 100 riding on the vehicle 90. At this time, the divergence angle of the light beam is controlled, and the light beam can be designed to enter the eyes of the viewer 100.

  The display content of the display unit 31 includes various contents related to operation information of the vehicle 90 such as an arrow indicating a traveling direction, a speed, a fuel amount, a distance to a destination, and a time.

  The display unit 31 has a transmissive mirror structure. The viewer 100 can perceive an image (virtual image) of the display contents on a background visually recognized through the windshield 91 at a desired depth position.

  1 and 4 show a state in which the display unit 31 is in the use position. In this use position, the display unit 31 is located on the indoor side of the vehicle 90 with respect to the windshield 91 and spaced from the windshield 91.

  The display unit 31 is driven by the drive mechanism shown in FIG. Further, the drive mechanism drives the cover 41 in conjunction with the drive of the display unit 31. The cover 41 opens and closes the opening 12 formed in the housing 11. The casing 11 is provided in a dashboard below the windshield 91. Alternatively, the housing 11 is a dashboard housing.

  The drive mechanism includes a motor 15, a worm 17, a cam gear 21, a support shaft 19, and a torsion coil spring 28. These are provided below the opening 12. The housing 11, the motor 15, and the support shaft 19 are provided stationary with respect to the vehicle 90.

  A drive shaft 16 of the motor 15 extends upward (opening 12 side), and a worm 17 is coupled to the drive shaft 16. The worm 17 has helical screw teeth 18.

  The support shaft 19 extends in a direction orthogonal to the drive shaft 16 of the motor 15 (the depth direction in FIG. 1). A cam gear 21 is rotatably supported on the support shaft 19.

  The cam gear 21 has a first gear portion 22 and a second gear portion 23. Both the first gear portion 22 and the second gear portion 23 are wheel gears, and are coupled or integrally provided with the centers thereof aligned. A common center hole is formed at the center of the first gear portion 22 and the second gear portion 23. A support shaft 19 is inserted into the center hole, and the cam gear 21 is rotatable around the support shaft 19.

  A first tooth 24 is provided on the outer peripheral portion of the first gear portion 22. The first teeth 24 are provided over the entire circumferential direction of the first gear portion 22. The first teeth 24 mesh with the screw teeth 18 of the worm 17.

  The worm 17 functions as a transmission gear that transmits the driving force of the motor 15 to the cam gear 21. The transmission gear is not limited to the worm structure, but may be a combination of a worm and a wheel gear. Or you may comprise a transmission gear from a wheel gear, without using a worm | warm. In this embodiment, by using one worm 17 as the transmission gear, the number of parts can be reduced, and the installation space can be saved.

  Second teeth 25 are provided on the outer peripheral portion of the second gear portion 23. The second gear portion 23 has a larger diameter than the first gear portion 22. Accordingly, the second teeth 25 are located on the outer peripheral side with respect to the first teeth 24. The second teeth 25 are not provided at all in the circumferential direction of the second gear portion 23. The second teeth 25 are provided in a partial range of the second gear portion 23 in the circumferential direction. Accordingly, there is a region where no teeth are provided on the outer peripheral portion of the second gear portion 23. The second teeth 25 are not engaged with the worm 17.

  Grooves 26 are formed on the side surfaces (front and back surfaces in FIG. 1) of the second gear portion 23. The groove 26 penetrates the second gear portion 23 in a direction penetrating the paper surface in FIG. The groove 26 is formed between the first tooth 24 and the second tooth 25. The groove 26 is formed by a curve along the rotation direction of the cam gear 21. The groove 26 is not formed in the entire circumferential direction of the second gear portion 23 but is formed in a part of the circumferential direction.

  The display unit 31 has a holder 32 provided in the lower part thereof. A through hole is formed in the holder 32, and the support shaft 19 is inserted into the through hole. Accordingly, the display unit 31 is supported by the support shaft 19 so as to be rotatable around the support shaft 19. By supporting the cam gear 21 and the display unit 31 on the common support shaft 19, it is possible to reduce the number of parts and save space.

  The holder 32 is provided with a protrusion 33. The protrusion 33 protrudes toward the side surface of the second gear portion 23 and is located in the groove 26. The rotation centers of the cam gear 21 and the display unit 31 coincide with each other. Therefore, the movement trajectory of the protrusion 33 when the display unit 31 rotates about the support shaft 19 coincides with the curve of the groove 26.

  The display unit 31 is supported by the support shaft 19 so as to be movable between the storage position shown in FIG. 2A and the use position shown in FIG. The display unit 31 is tilted at the storage position and is upright at the use position.

  A torsion coil spring 28 is also supported on the support shaft 19. The support shaft 19 is inserted into the coil portion of the torsion coil spring 28. The tip of one arm 28 a of the torsion coil spring 28 is in contact with the protrusion 33. The tip of the other arm 28 b of the torsion coil spring 28 can be brought into contact with a spring stop portion 27 provided on the side surface of the second gear portion 23.

  The cover 41 is provided at or near the opening 12. The cover 41 is provided so as to be capable of reciprocating between a closed position shown in FIG. 2A and an open position shown in FIG. The cover 41 moves in a direction orthogonal to the drive shaft 16 of the motor 15 while being guided by a guide portion (not shown). The cover 41 covers the display unit 31 in the storage position at the closed position, and opens the display unit 31 in the use position at the open position.

  The surface of the cover 41 is exposed in the vehicle. The back surface of the cover 41 is directed downward from the opening 12, and third teeth 42 are provided on the back surface. The third teeth 42 can mesh with the second teeth 25 of the second gear portion 23, and the cover 41 and the second gear portion 23 have a so-called rack and pinion relationship.

  In the third tooth 42, the tooth 42a closest to the opening 12 (right end in FIG. 1) is higher than the other teeth 42b. That is, the amount of protrusion of the teeth 42a is larger than that of the other teeth 42b.

  Next, operations of the display unit 31 and the cover 41 will be described with reference to FIGS. 1 and 2A to 3B. 2A to 3B, the motor 15 and the worm 17 are not shown.

  FIG. 2A shows a state where the display unit 31 is in the storage position.

  At the storage position, the display unit 31 is stored in a tilted position in a space below the opening 12. A stopper 13 is provided in the space. The stopper 13 is provided integrally with the housing 11. Alternatively, the stopper 13 may be provided as a separate member with respect to the housing 11. The upper end of the surface of the display unit 31 contacts the stopper 13 at the storage position.

  The protrusion 33 is positioned at one end of the groove 26 at the storage position. One arm 28 a of the torsion coil spring 28 is in contact with the projection 33, and the other arm 28 b is in contact with a spring stopper 27 provided on the cam gear 21.

  The projection 33 and the spring stopper 27 are subjected to a restoring force that causes the arms 28a and 28b of the torsion coil spring 28 to expand. At this time, the motor 15 is not driven, the cam gear 21 does not rotate, and the spring stopper 27 maintains the position shown in FIG. Therefore, the arm 28a biases the protrusion 33 downward. Thereby, the display part 31 is urged | biased to the accommodation position, and maintains the accommodation position.

  When the display unit 31 is in the storage position, the cover 41 is in the closed position. In the closed position, the cover 41 closes the opening 12 and covers the display unit 31 in the storage position. In the closed position, the third teeth 42 of the cover 41 mesh with the second teeth 25 of the cam gear 21.

  When the motor 15 is driven in the storage position (closed position), the worm 17 rotates. The screw teeth 18 of the worm 17 mesh with the first teeth 24 of the cam gear 21. Therefore, the cam gear 21 starts to rotate.

  The cover 41 and the second gear portion 23 of the cam gear 21 have a rack and pinion relationship. Therefore, when the cam gear 21 starts to rotate in the first direction a (counterclockwise in this embodiment), the cover 41 moves linearly toward the open position as shown in FIG. Thereby, the opening 12 is gradually opened.

  As the cam gear 21 rotates in the first direction a, the groove 26 also moves in the first direction a. At this time, the protrusion 33 does not move but relatively moves along the groove 26. The spring stopper 27 moves in the first direction a as the cam gear 21 rotates in the first direction a.

  When the cam gear 21 further rotates in the first direction a from the position of FIG. 2B, the other end of the groove 26 reaches the protrusion 33, and the protrusion 33 is in the first direction a by the inner wall (end wall) of the groove 26. Pressed. As a result, as shown in FIG. 2C, the display unit 31 starts to rise from the storage position with the support shaft 19 as a fulcrum while the cover 41 continues to move to the open position.

  Even when the cover 41 starts to open, the display unit 31 does not rise and maintains the storage position until the end wall of the groove 26 reaches the protrusion 33. Here, the position of the cover 41 when the end wall of the groove 26 reaches the protrusion 33 is defined as an intermediate position. The intermediate position is a position between the closed position and the open position, and is a position that opens the opening 12 to some extent. Until the cover 41 reaches the intermediate position, the display unit 31 maintains the storage position and does not get up. Since the display unit 31 starts to rise with the opening 12 opened to some extent, the display unit 31 does not hit the cover 41.

  It may be considered that the display unit 31 is driven simultaneously with the start of the movement of the cover 41. However, in this case, in order to avoid interference between the cover 41 and the display unit 31, the storage position of the display unit 31 is positioned further below the position shown in FIG. What is necessary is just to make it the part 31 begin to get up. However, this leads to an increase in storage space.

  On the other hand, in this embodiment, since the storage position (starting start position) of the display unit 31 is in the vicinity of the opening 12, the display unit 31 is raised when the cover 41 is opened to some extent. Interference between the cover 41 and the display unit 31 can be avoided while providing a large storage space.

  When the display unit 31 starts to rise, the cover 41 and the display unit 31 operate in conjunction with the rotation of the cam gear 21 in the first direction a.

  That is, as shown in FIG. 3A, the cover 41 further moves to the open position side, and in conjunction with this, the display unit 31 rises toward the use position.

  When the display portion 31 starts to rise, the torsion coil spring 28 has cam arms around the support shaft 19 in a state where one arm 28a is brought into contact with the protrusion 33 and the other arm 28b is brought into contact with the screwing portion 27. 21 and the first direction a.

  When the display unit 31 moves to the use position shown in FIG. 3B, the drive of the motor 15 is stopped and the rotation of the cam gear 21 is stopped. As a result, the cover 41 stops at the open position shown in FIG. At this time, the engagement between the third teeth 42 of the cover 41 and the second teeth 25 of the cam gear 21 is released.

  In the use position, the protrusion 33 is pressed against the end wall of the groove 26 by the torsion coil spring 28. Thereby, the display part 31 can maintain an upright state.

  After the display unit 31 is moved to the use position and the cover 41 is stopped at the open position, the motor 15 is driven again to slightly rotate the cam gear 21 in the first direction a or the opposite second direction b. Thus, the display unit 31 can be tilted from the use position.

  When the cam gear 21 is rotated in the first direction a from the use position shown in FIG. 3B, the projection 33 is pushed in the first direction a by the end wall of the groove 26. Thereby, the display part 31 inclines in the direction away from a viewer (left side in a figure).

  At this time, the third teeth 42 of the cover 41 do not mesh with the second teeth 25 of the cam gear 21. Accordingly, the cover 41 remains stopped at the open position.

  When the cam gear 21 is rotated in the second direction b opposite to the first direction a from the use position shown in FIG. 3B, the end wall of the groove 26 in contact with the protrusion 33 is also in the second direction. Move to b. At this time, the arm 28 a of the torsion coil spring 28 urges the protrusion 33 against the end wall of the groove 26. Therefore, when the cam gear 21 is slightly rotated in the second direction b, the display unit 31 is inclined toward the viewer side (rightward in the drawing).

  In the use position, the end tooth 25 a on the second direction b side of the second tooth 25 of the cam gear 21 is separated from the end tooth 42 a on the closed position side of the cover 41. Therefore, the cam gear 21 can be slightly rotated in the second direction b from the use position without applying the teeth 25a to the teeth 42a. If the rotation is within the range, the display unit 31 can be slightly tilted while maintaining the stop of the cover 41 at the open position.

  By adjusting the tilt of the display unit 31, the display position (display height) of the video can be adjusted. Therefore, even if the height of the viewer's eyes fluctuates according to the viewer's height, sitting height, backrest angle, seating posture, etc., the appropriate viewing position can be obtained by finely adjusting the tilt of the display unit 31. Can be set.

  Further, when adjusting the tilt of the display unit 31, even if the cam gear 21 rotates, the cover 41 does not interlock with the display unit 31 and remains stopped at the open position. Therefore, the cover 41 does not hinder the tilting operation of the display unit 31.

  Next, the movement operation of the display unit 31 to the storage position and the closing operation of the cover 41 will be described.

  When the motor 15 is driven in the use position (closed position) shown in FIG. 3B and the cam gear 21 is rotated in the second direction b, the end wall of the groove 26 in contact with the protrusion 33 is also second. Move in direction b. The protrusion 33 is biased in the second direction b by the arm 28 a of the torsion coil spring 28. That is, the protrusion 33 is pressed against the end wall of the groove 26. Therefore, as the cam gear 21 rotates in the second direction b, the display unit 31 falls to the second direction b side with the support shaft 19 as a fulcrum.

  When the cam gear 21 rotates in the second direction b, the second teeth 25 of the cam gear 21 mesh with the third teeth 42 of the cover 41, and the cover 41 starts to move to the closed position. In the state where the cover 41 is in the open position, the height of the tooth 42a provided on the most closed position side of the third tooth 42 is higher than the height of the other teeth 42b of the third tooth 42. Therefore, even when the engagement between the second tooth 25 and the third tooth 42 is disengaged, when the cam gear 21 starts to rotate in the second direction b, the tooth 42a having a large protrusion amount is The second tooth 25 can be reliably applied, and the second tooth 25 and the third tooth 42 can be smoothly meshed.

  When the cam gear 21 continues to rotate in the second direction b and the upper end of the display unit 31 comes into contact with the stopper 13 and the cover 41 closes the opening 12 as shown in FIG. Is stopped, and the rotation of the cam gear 21 is also stopped.

  In this closed position, the display unit 31 is covered with the cover 41. Therefore, the display unit 31 can be protected from scratches, dust, sunlight, and the like when not in use, such as when not driving.

  In the present embodiment, a combination of one motor 15 and one cam gear 21 can drive the display unit 31 and the cover 41 that move differently in conjunction with each other. As a result, it is possible to reduce the size, reduce the number of parts, and reduce costs.

  However, as described above, when the opening operation of the cover 41 is started and when the inclination is adjusted at the use position of the display unit 31, the cover 41 and the display unit 31 are not interlocked, and one of them remains stopped. By maintaining the display unit 31 in the closed position when the cover 41 is opened, the display unit 31 can be raised without colliding with the cover 41 while realizing a compact installation space. When the tilt of the display unit 31 is adjusted, the tilt operation of the display unit 31 is not hindered by the cover 41 by stopping the cover 41 in the open position.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 15 ... Motor, 17 ... Worm, 21 ... Cam gear, 22 ... 1st gear part, 23 ... 2nd gear part, 24 ... 1st tooth | gear, 25 ... 2nd tooth | gear, 26 ... Groove, 28 ... Torsion coil Spring, 31 ... display unit, 33 ... projection, 41 ... cover, 42, 42a, 42b ... third tooth, 70 ... display device, 81 ... video data generation unit, 82 ... video projection unit

Claims (5)

A motor,
A transmission gear coupled to the motor;
A support shaft;
A cam gear rotatably supported by the support shaft, the first gear meshing with the transmission gear, the second tooth rotating integrally with the first tooth, and provided along the rotation direction A cam gear having a groove;
A display unit that is provided so as to be movable between a storage position that is in a tilted position and a use position that is in a standing position, and having a protrusion positioned in the groove;
A third position that is reciprocally movable between a closed position that covers the display section in the storage position and an open position that opens the display section in the use position and that can mesh with the second tooth. A cover having teeth;
An image light generation unit that projects a light beam including an image onto the display unit;
With
In the closed position, the third tooth meshes with the second tooth, and as the cam gear rotates in the first direction, the cover moves from the closed position to the open position, and The projection is pushed against the inner wall of the groove, and the display unit rises from the storage position toward the use position,
The engagement of the third tooth and the second tooth is disengaged in the open position, the cover is stopped, and the cam gear is stopped in the open position, and the cam gear is in the first direction or vice versa. The display device can be tilted from the use position by rotating in the second direction. The cam gear has a first gear portion and a second gear portion that rotate together,
The first teeth are provided over the entire circumferential direction of the first gear portion,
The display device according to claim 1, wherein the second tooth is provided in a partial range in a circumferential direction of the second gear portion.   In the state where the cover is in the open position, the height of the tooth provided on the most closed position side in the third tooth is higher than the heights of the other teeth in the third tooth. The display device according to claim 1.   The display device according to claim 1, further comprising a spring that biases the display unit to the storage position.   The protrusion relatively moves along the groove until the cover moves from the closed position to an intermediate position between the closed position and the open position, and the display unit moves to the storage position. The display device according to claim 1, wherein the display device is maintained.

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