JP2007125961A - On-vehicle display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure smooth motion of a display body when it is rotated to be displaced. <P>SOLUTION: A display device 11 for a rear seat having a display body 15 in the form of a rectangular panel is provided to be positioned roughly at a center part of a ceiling part of a cabin of an automobile. The display body 15 is provided on a chassis part 14 to be rotatable to be displaced between a housed position (at an angle of 0deg.) where it is roughly horizontally housed and a usage position (at an angle of 120deg.) where it is opened forward, and an opening/closing mechanism 18 is provided to rotate the display body 15 to be displaced. The opening/closing mechanism 18 is composed of a motor 19 as a drive source, a gear mechanism 20 to reduce and transmit drive force of the motor 19 to a shaft part 17 of the display body 15, etc. On the gear mechanism 20, a gear damper 39 is provided to generate torque as resistance to rotation of the display body 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted display device in which a panel-shaped display body is rotationally displaced between a use position and a storage position by an opening / closing mechanism including a motor and a gear mechanism.

  In recent years, in vehicles (automobiles), a rear seat occupant is called RSE (Rear Seat Entertainment) on the ceiling in the center of the passenger compartment so that passengers in the rear seats can enjoy TV programs and video software. It is considered to provide a display device (for example, see Patent Document 1).

  As shown in FIG. 5, this type of vehicle-mounted display device (RSE) 1 is provided with a rectangular panel-shaped display body 3 having a liquid crystal display 3 a in a chassis portion 2 assembled to a ceiling portion in a vehicle interior. It is configured. At this time, the display body 3 has a storage position (a position where the angle is 0 degree) along the ceiling horizontally and a lower side from the vertical direction by the rotation shaft 4 extending horizontally in the left and right sides of the upper part. It is attached so as to be rotatable between a use position (position where the angle is 120 degrees) slightly inclined to the front side.

  The chassis unit 2 is provided with an opening / closing mechanism 5 for automatically rotating the display body 3. The opening / closing mechanism 5 includes a motor 6 serving as a drive source, and a gear mechanism 7 including a plurality of gears that reduce the driving force of the motor 6 and transmit it to the display main body 3 (rotating shaft 4). It is configured. The motor 6 is controlled by the control unit 8 and is driven to rotate in forward and reverse directions.

In the in-vehicle display device 1, the display main body 3 is positioned at the storage position in order to ensure a wide rear view of the driver when not in use. On the other hand, at the time of use (when the passenger in the rear seat wants to enjoy TV programs, video software, etc.), for example, the display main body 3 is rotationally displaced to the use position by the opening / closing mechanism 5 based on the user's switch operation. The As a result, the screen of the liquid crystal display 3a is positioned slightly rearward and obliquely downward, making it easy for the passenger in the rear seat to see. The display body 3 is preferably rotated at a relatively slow constant speed.
JP 2002-234390 A

  By the way, in the said structure, the force of the perpendicular direction (force of the direction which hangs down right below) acts on the display main body 3 with the dead weight. In FIG. 5, the center of gravity of the display body 3 is indicated by G, the force in the direction of gravity acting on the center of gravity G is indicated by F, and the component force in the rotational direction of the force F in the direction of gravity is indicated by f. For this reason, the load corresponding to the rotational direction acts on the plurality of gears constituting the gear mechanism 7. At this time, the display main body 3 passes between the storage position and the use position through the position where the display main body 3 faces in the vertical (directly below) direction (position at an angle of 90 degrees). Before and after the position, the load acting in the rotation direction of each gear in the gear mechanism 7 is switched in the opposite direction.

  That is, when the display main body 3 is between 0 degrees and 90 degrees, a load for rotating the display main body 3 in the direction of arrow A acts on each gear constituting the gear mechanism 7, From the angle 90 degrees to 120 degrees of the display body 3, a load in a direction to return the gear mechanism 7 in the direction opposite to the arrow A acts. Therefore, for example, when the display main body 3 is rotated in the direction of the arrow A from the storage position to the use position, the display main body 3 tries to advance further by gravity until 90 degrees, and the motor 6 rather suppresses it. Each gear of the gear mechanism 7 is rotated while the brake is applied. If the angle exceeds 90 degrees, the motor 6 rotates the gears against the gravity acting on the display body 3. When the display body 3 is rotated from the use position to the storage position, the same phenomenon occurs although the direction is reversed.

  For this reason, in the above configuration, when the display main body 3 passes through the position facing the vertical (directly below) direction, the tooth surface to which the load of each gear constituting the gear mechanism 7 is applied is cut to the opposite side in the rotation direction. Instead, due to the backlash of the gear, a phenomenon occurs in which the rotation of the display body 3 stops for a moment. As a result, for example, the smooth movement of the display main body 3 when it is rotated from the storage position to the use position is not ensured, resulting in inconvenience that the merchantability is inferior.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an in-vehicle display device that can ensure a smooth movement when the display main body is rotationally displaced, and can improve the merchantability. It is in.

  In order to achieve the above object, an in-vehicle display device according to the present invention includes a display main body having a panel shape that is rotatably provided between a use position and a storage position in a vehicle interior, and the display main body is rotated. An opening / closing mechanism composed of a motor and a gear mechanism for displacing, and the display main body configured to pass through a position facing the vertical direction when moving between the use position and the storage position. The gear mechanism is characterized in that a resistance applying means for generating a torque that serves as a resistance for rotation of the display main body is provided (invention of claim 1).

  According to this, resistance is applied to the gear mechanism by the resistance applying means, so that it is possible to counteract the force that the display body tries to rotate due to its own weight and counter the influence of the display body's own weight on the gear mechanism. It becomes. Therefore, it is possible to always make the tooth surfaces to which the load of each gear of the gear mechanism is applied the same when the display body is rotated in one direction by the driving force of the motor. For this reason, before and after the display main body passes through the position facing the vertical direction, it is possible to prevent the tooth surface to which the load of each gear constituting the gear mechanism is applied from being switched to the opposite side in the rotation direction. A smooth movement when the main body is rotationally displaced can be ensured, and as a result, merchantability can be improved.

  At this time, a gear damper that applies resistance to the rotation of the gear is adopted as the resistance applying means, and this gear damper can be provided so as to mesh with any one of the gears constituting the gear mechanism. invention). According to this, the resistance applying means can be provided with a simple configuration and can be provided in a small space.

  As the gear damper, for example, various small-sized gears that generate torque by the viscosity of oil are commercially available, and those that can obtain the required torque can be employed. The position where the gear damper is provided may be any gear portion constituting the gear mechanism. In addition, the present invention can be applied to a display device for a rear seat in which a display main body is provided on a ceiling portion in a vehicle interior (invention of claim 3).

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. In this embodiment, the present invention is applied to an RSE provided in a central ceiling portion of a passenger compartment of a car so that a passenger in a rear seat can enjoy a TV program or video software or view a navigation screen. It applies to the display device for the rear seats called.

  FIG. 4 schematically shows a vehicle (automobile) 12 on which a rear-seat display device (RSE) 11 as an in-vehicle display device according to the present embodiment is mounted. (Driver seat and front passenger seat) 12b and a rear seat 12c are provided. The rear seat display device 11 is provided at a substantially central portion in the front-rear direction of the ceiling portion of the passenger compartment 12a. In addition, a front seat display device 13 made of, for example, a full-color liquid crystal display is provided in the front part of the passenger compartment 12a, for example, at the center upper part of the instrument panel.

  Although illustration and detailed explanation are omitted, this vehicle 12 is equipped with a navigation system. As is well known, this navigation system includes a control device that is configured mainly by a microcomputer including a CPU, a ROM, a RAM, and the like and controls the entire system. This control device includes a GPS detector, a position detector that detects the position of the vehicle, a map database, operation switches, a voice input / output device, a communication device, a TV / radio receiver, a drive device such as a CD or DVD, etc. And the rear seat display device 11 and the front seat display device 13 are also controlled by the control device.

  At this time, the front seat display device 13 normally displays a navigation screen (map display screen) for notifying the driver of the current position of the vehicle and guiding the route to the destination. The The front seat display device 13 can also display received television programs and videos such as DVDs. The rear seat display device 11 also displays the same screen as the front seat display device 13 or a different screen (television program or video software) from the front seat display device 13 according to a user instruction. Can be done.

  Here, the display device 11 for the rear seat according to the present embodiment will be described. As shown in FIGS. 1 and 2, the rear seat display device 11 is configured by providing a display body 15 in a chassis portion 14. Among them, the chassis portion 14 has a slightly long rectangular shape in the front-rear direction, and is attached to the ceiling portion in the passenger compartment 12a in a substantially horizontal state. Although not shown in detail, on the rear side of the chassis part 14, a panel part 16 having a remote control receiving part, a headphone jack, and the like is provided. The front side of the chassis portion 14 is a rectangular storage portion 14a in which the display main body 15 is stored, and mechanism portions 14b and 14b are provided on both the left and right sides of the storage portion 14a and projecting downward. ing.

  The display body 15 is formed in a rectangular panel shape having a full-color liquid crystal display 15a on the rear side in the figure. The display main body 15 has a shaft portion 17 (see FIG. 1) that is positioned at the upper end portion of the left and right side portions and extends sideward (horizontal direction). Is supported at the front end portion (between the left and right mechanism portions 14b, 14b) in a freely rotatable manner. At this time, the display main body 15 opens to the storage portion 14a in a substantially horizontal state (position at an angle of 0 degrees), and the lower side opens to the front side (left side in FIG. 1) so that the occupant of the rear seat 12c The liquid crystal display 15a can be rotated and displaced between a use position where the liquid crystal display 15a can be seen almost in front (for example, a position at an angle of 120 degrees). In this embodiment, the use position can be freely set by the user between 90 degrees (vertically downward) to 120 degrees.

  As shown in FIG. 1, the chassis portion 14 (one mechanism portion 14b) is opened and closed to automatically and electrically displace the display body 15 between the use position and the storage position. A mechanism 18 is provided. The opening / closing mechanism 18 includes a motor 19 serving as a driving source, a gear mechanism 20 for decelerating and transmitting the driving force of the motor 19 to the shaft portion 17 of the display body 15, a control unit 21 for controlling energization of the motor 19, and the like. It has. The gear mechanism 20 is rotatable to a frame (not shown) for transmitting the driving force of the worm gear 22 attached to the output shaft of the motor 19 to the driving gear 23 attached to the shaft portion 17 of the display body 15. Are provided with first to fifth shafts 24 to 28 and first to ninth gears 29 to 37 attached to the first to fifth shafts 24 to 28.

  That is, the worm gear 22 meshes with a first gear 29 having a large diameter attached to the first shaft 24. A small-diameter second gear 30 attached to the first shaft 24 meshes with a large-diameter third gear 31 attached to the second shaft 25. A small-diameter fourth gear 32 attached to the second shaft 25 meshes with a large-diameter fifth gear 33 attached to the third shaft 26. A small-diameter sixth gear 34 attached to the third shaft 26 meshes with a large-diameter seventh gear 35 attached to the fourth shaft 27. An eighth gear 36 having a small diameter attached to the fourth shaft 27 is engaged with a ninth gear 37 attached to the fifth shaft 28, and the ninth gear 37 is engaged with the drive gear 23. Are engaged.

  Thus, the driving force of the motor 19 is transmitted to the shaft portion 17 via the gear mechanism 20, and the display body 15 is rotationally displaced between the storage position and the use position. At this time, for example, the display main body 15 is rotated in the direction of arrow A from the storage position toward the use position by the normal rotation of the motor 19, and the display main body 15 is moved from the use position to the storage position by the reverse rotation of the motor 19. It rotates in the direction opposite to arrow A.

  The gear mechanism 20 is provided with an angle detection sensor 38 for detecting the rotation angle of the drive gear 23 and thus the shaft portion 17. The position of the display main body 15 is switched based on, for example, a user switch operation (remote control operation). Furthermore, when the engine of the automobile is stopped, the display main body 15 in the use position is automatically returned to the storage position.

  The gear mechanism 20 is provided with a gear damper 39 as resistance applying means for generating a torque that serves as a resistance for rotation of the display main body 15. As this gear damper 39, for example, a small one that generates torque by the viscosity of oil is adopted. As shown in FIG. 3, the gear portion 39b can be rotated on the surface portion of a circular main portion 39a having an oil chamber inside. It is comprised. At this time, the rotation shaft 39c of the gear portion 39b has blades in the main portion 39a, and the blades are immersed in the oil sealed in the oil chamber so that the rotation resistance of the gear portion 39b is generated. It is configured.

  In this embodiment, the gear damper 39 is provided on the left side of the drive gear 23 in FIG. 1 so that the gear portion 39b meshes with the drive gear 23, as shown in FIGS. . As a result, resistance is imparted to the rotation of each of the gears 22, 23, 29 to 36 constituting the gear mechanism 20, and the influence of the weight of the display main body 15 on the gear mechanism 20 can be canceled out. It is.

  In the above configuration, when the user (occupant in the rear seat) wants to enjoy, for example, a television program or video software using the rear seat display device 11, the switch is used to rotate and displace the display body 15 from the storage position to the use position. Perform the operation (remote control operation). Then, the motor 19 is energized by the control unit 21 in the opening / closing mechanism 18 and the motor 19 is rotated forward, for example, at a constant speed, whereby the display main body 15 is rotated in the direction of the arrow A via the gear mechanism 20 to be used. It stops when it is rotated and displaced.

  Here, due to its own weight, the gravity (vertical) direction force (vertical direction in which it hangs down to the right (90 ° position)) F acts on the display body 15 due to its own weight. A load corresponding to the rotational direction acts on the plurality of gears 22, 23, 29 to 36 constituting the gear mechanism 20 by the force f. At this time, the display main body 15 passes through a position (position at an angle of 90 degrees) facing the vertical (directly below) direction between the storage position and the use position, but before and after the position at an angle of 90 degrees, The load acting in the direction of the component force f, that is, the rotation direction of the gears 22, 23, 29 to 36 of the gear mechanism 20, is switched in the opposite direction.

  In the conventional apparatus shown in FIG. 5, when the display main body 3 is rotated in the direction of arrow A from the storage position to the use position, the display main body 3 tries to advance further by gravity up to 90 degrees, and the motor 6 Rather, the driving force of the engine acts as a braking force to suppress it. For this reason, when the display main body 3 passes through a position in which the display main body 3 is directed in the vertical (directly below) direction, the tooth surface on which the load of each gear constituting the gear mechanism 7 is applied is switched to the opposite side in the rotation direction. Due to the backlash, there has been a phenomenon in which the rotation of the display body 3 stops for a moment.

  However, in this embodiment, by providing the gear mechanism 39 with the gear damper 39, it is possible to resist the force that the display body 15 tries to rotate by its own weight. Accordingly, the influence of the weight of the display body 15 on the gear mechanism 20 can be canceled, and the driving force of the motor 6 is always against the resistance force of the gear damper 39 in the direction of rotating the display body 15 in the direction of arrow A. The tooth surfaces to which the loads of the gears 22, 23, 29 to 36 of the gear mechanism 20 are applied are always between 0 degrees and 90 degrees and between 90 degrees and 120 degrees. It becomes the same.

  As a result, the tooth surfaces on which the loads of the gears 22, 23, 29 to 36 constituting the gear mechanism 20 are switched to the opposite side in the rotational direction before and after the display main body 15 passes through the 90-degree position in the vertical direction. This can be prevented, and as a result, a smooth movement can be ensured when the display body 15 is rotationally displaced.

  Although not described in detail, when the display main body 15 is rotationally displaced from the use position to the storage position in the direction opposite to the arrow A, similarly, the gears 22, 23, 29 to 36 of the gear mechanism 20 are used. The tooth surface to which the load is applied is always the same between 120 ° and 90 ° and between 90 ° and 0 ° (the tooth surface on the side opposite to the rotation direction when rotating in the direction of arrow A). As a result, smooth movement when the display main body 15 is rotationally displaced can be ensured.

  As described above, according to the rear seat display device 11 of the present embodiment, the display main body 15 is configured so as to pass through a position facing the vertical direction when moving between the use position and the storage position. Thus, it is possible to ensure a smooth movement when the display main body 15 is rotationally displaced, and to achieve an excellent effect that the merchantability can be improved. In particular, in this embodiment, since the gear damper 39 is employed as the resistance applying means, a simple and inexpensive configuration can be achieved, and the opening and closing mechanism 18 can be prevented from being enlarged by being provided in a small space. It is something that can be done.

  In the above-described embodiment, the gear damper 39 is provided so as to mesh with the drive gear 23 of the shaft portion 17. However, the gear damper 39 may be provided at any gear portion constituting the gear mechanism 20. . Furthermore, although the gear damper 39 is employed as the resistance applying means in the above embodiment, another configuration, for example, a configuration in which resistance is applied by a spring washer can be employed. In addition, the present invention can be applied not only to the rear-seat display device 11 provided on the ceiling portion in the passenger compartment 12a but also to all in-vehicle display devices provided at various positions. The specific configuration can be variously modified and implemented as appropriate without departing from the spirit of the invention, such as various modifications.

The left view which shows one Example of this invention and is a display apparatus for backseats A perspective view of the rear seat display device as seen from different directions (right rear) The perspective view which shows the external appearance (a) and attachment state (b) of a gear damper Left side view schematically showing the configuration of the vehicle 1 equivalent diagram showing a conventional example

Explanation of symbols

  In the drawings, 11 is a rear seat display device (vehicle display device), 12 is a vehicle, 12a is a passenger compartment, 14 is a chassis portion, 15 is a display body, 17 is a shaft portion, 18 is an opening / closing mechanism, 19 is a motor, Reference numeral 20 denotes a gear mechanism, and 39 denotes a gear damper (resistance applying means).

Claims (3)

A display body in the form of a panel provided in the vehicle interior so as to be capable of rotational displacement between a use position and a storage position;
With an opening / closing mechanism consisting of a motor and a gear mechanism for rotationally displacing the display body,
The display main body is an in-vehicle display device configured to pass through a position facing in a vertical direction when moving between the use position and the storage position,
An in-vehicle display device characterized in that the gear mechanism is provided with a resistance applying means for generating a torque that becomes a resistance of rotation of the display body.   The in-vehicle display device according to claim 1, wherein the resistance applying unit includes a gear damper that applies resistance to rotation of the gear, and is provided so as to mesh with any one of the gears constituting the gear mechanism.   The in-vehicle display device according to claim 1, wherein the display main body is a display device for a rear seat provided on a ceiling portion in a vehicle interior.

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