JP2001088620A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle display device in a simple constitution. SOLUTION: In this on-vehicle display device, a display 6 is retained on an inner side of a fixed case 1 fixed to a car body movably to the outside and the inside of the fixed case 1 and standably at the outside of the fixed case 1. The display device is provided with a first gear row 10 for moving the display 6 to the outside and the inside of the fixed case 1, a second gear row 20 for standing up the display 6 at the outside of the fixed case 1, a motor 30 capable of driving the first gear row 10 and the second gear row 20, and a ball differential gear 40 provided between the first gear row 10 and the second gear row 2 and constituted so as to optionally change a torque distribution ratio to the respective gear row when a resistance is applied to any one of gear row.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle display device having a display unit which can be stored inside a fixed case, for example.

[0002]

2. Description of the Related Art In general, there is known an in-vehicle display device which holds a liquid crystal display inside a fixed case fixed to a vehicle body so as to be movable inside and outside the fixed case and to be able to stand up outside the fixed case. Have been. In this type, two motors are provided, one of which moves the liquid crystal display in and out of the fixed case, and the other motor makes it rise outside the fixed case. A cam is provided at the discharge end of the liquid crystal display, and when the lever provided on the liquid crystal display comes into contact with the cam, the driving force of the liquid crystal display is switched from discharge movement to startup. A structure has been proposed in which one motor moves the liquid crystal display outside the fixed case and manually raises the liquid crystal display outside the fixed case.

[0003]

However, in the above configuration, two motors are required, and when a gear train is used for driving, two torque limiters are used to protect each gear train. There is a problem that it becomes necessary. In the above configuration, when a gear is used for switching the driving force, it becomes difficult to manage the backlash of the gear, the gear pitch, and the like, and the switching mechanism may malfunction due to deformation of the support portion of the gear and the cam itself. There are problems such as easy occurrence and complicated structure. In addition, in the above configuration, the structure is simple, but there is a problem that manual operation is required for starting up the liquid crystal display.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an in-vehicle display device having a simplified configuration.

[0005]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 is provided such that it can move inside and outside of a fixed case fixed to a vehicle body.
In a vehicle-mounted display device holding a display so as to be able to rise outside the fixed case, a first gear train for moving the display inside and outside the fixed case, and a second gear train for raising the display outside the fixed case Two gear trains, one motor that can drive the first gear train and the second gear train, provided between the first gear train and the second gear train,
When a resistance is applied to one of the gear trains, a ball differential gear configured to arbitrarily change a torque distribution ratio to each gear train is provided.

According to a second aspect of the present invention, there is provided an in-vehicle display in which a display is held inside a fixed case fixed to the vehicle body so as to be movable in and out of the fixed case and riseable outside the fixed case. A first gear train for connecting the display to the moving case and moving the moving case within the fixed case; a second gear train for raising the display outside the fixed case; One motor that can drive the gear train and the second gear train, and is provided between the first gear train and the second gear train, and when a resistance is applied to any of the gear trains, A ball differential gear configured so that the torque distribution ratio can be arbitrarily changed. When the moving case moves in the fixed case, the ball differential gear reduces the torque distribution ratio to the second gear train to approximately zero. When the indicator rises outside the fixed case, the torque distribution ratio to the first gear train is made substantially zero, and at a position intermediate between the two, the torque distribution ratio of the first gear train and the second gear train is reduced. It is characterized by being substantially equal.

According to the present invention, when a resistance is applied to one of the gear trains, a ball differential gear configured to arbitrarily change the torque distribution ratio to each gear train is provided, so that only one motor is required. In addition, there is no need to separately provide a torque limiter, which allows a compact design and space saving.

According to a third aspect of the present invention, there is provided an in-vehicle display having a display inside a fixed case fixed to a vehicle body so as to be movable in and out of the fixed case and to be able to stand up outside the fixed case. In the device, a first gear train for moving the display in and out of the fixed case, a second gear train for raising the display outside the fixed case, and a first gear train and a second gear train. One driveable motor and a ball differential gear provided between the first gear train and the second gear train and having a clutch function capable of selectively interrupting torque distribution to each gear train. It is characterized by the following.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes a fixed case fixed to a vehicle body. The guide rails 2 are fixed to the inner surfaces of both side plates 1a of the fixed case 1, and the guide rails 7 are fixed to the inner surface of the top plate 1b of the fixed case 1.
Has been fixed. A guide roller 3 is rotatably fitted in a guide groove of one guide rail 2, and a guide pin 8 is fitted in a guide groove of the other guide rail 7.

One guide roller 3 is supported by both side plates 5 a of the moving case 5, and the other guide pin 8 is fixed to a top plate 5 b of the moving case 5. The guide roller 3 performs vertical positioning, and the guide pin 8 performs horizontal positioning. A liquid crystal display 6 is connected to the tip of the moving case 5.

The moving case 5 is integrally formed with the liquid crystal display 6 so as to be able to advance inside the fixed case 1 via the first gear train 10 as shown in FIG. When 5 moves forward and reaches the position shown in FIG.
The movable case 5 is connected to the fixed case 1 via the first gear train 10.
, The liquid crystal display 6 starts the rising operation outside the fixed case 1 via the second gear train 20. Then, the rising operation is completed at the position shown in FIG.

First gear train 10 and second gear train 20
Is configured to be drivable by one motor 30, as shown in FIG. The output shaft of this motor 30 has a gear 31
The large-diameter teeth 11a of the reduction gear 11 having two teeth are meshed with the gear 31. This reduction gear 11 is supported by the moving case 5 by a support shaft 12,
The input gear 41 constituting the ball differential gear 40 is meshed with the small-diameter teeth 11 b of the reduction gear 11.

The ball differential gear 40 has:
As shown in FIG. 6, an input gear 41 is provided. The input gear 41 is formed with four receiving holes 41a, and each receiving hole 41a carries a ball bearing 42, respectively. Further, a first output gear 43 and a second output gear 44 are provided on both sides thereof via a clutch member 49, respectively. These members 41 to 44 are integrally and rotatably supported by the movable case 5 by the support shaft 45.

A coil spring 46 is provided on the outer periphery of the support shaft 45.
The coil spring 46 applies a compressive force between the washer 47 and the E-ring 48 fixed to the support shaft 45, and the members 41 to 44 are fastened by the compressive force.

When torque is input to the input gear 41, the four ball bearings 42 rotate, and the input torque is distributed to the first output gear 43 and the second output gear 44. Is done.

In the ball differential gear 40, the transmission force can be adjusted by changing the spring force of the coil spring 46 and the material of the clutch member 49, so that the ball differential gear 40 functions as a so-called torque limiter. In addition, there is no need to provide a separate torque limiter.

As shown in FIG. 1, the first output gear 43 is meshed with a first transmission gear 51, and the first transmission gear 51 is a rack gear 52 fixed to a top plate of the fixed case 1. Are engaged.

Gear 3 fixed to output shaft of motor 30
1, the first reduction gear 11, the first output gear 43 of the ball differential gear 40, the first transmission gear 51, and the rack gear 52 constitute a first gear train 10.

As shown in FIG. 2, the second output gear 44 is meshed with a rotating gear 55 via second and third transmission gears 53 and 54. This rotating gear 55
As shown in FIG. 1, it is formed integrally with the liquid crystal display 6,
Second output gear 44, second and third transmission gears 53, 54
When the driving force is transmitted to the rotating gear 55 via the
The liquid crystal display 6 rises as shown in FIG.

The second output gear 44, the second and third transmission gears 53 and 54, and the rotating gear 55 constitute the second gear train 20.

As shown in FIG. 1, a printed board 61 is provided substantially horizontally below the fixed case 1, and photosensors 62 and 63 are mounted on the printed board 61 at predetermined intervals in the front-rear direction. Have been. Each of the photo sensors 62 and 63 detects a flag 64 fixed to the lower surface of the moving case 5 and detects the position of the moving case 5. That is, the photo sensor 62 detects the retreat limit position of the moving case 5, and the photo sensor 63 detects the moving case 5
The forward limit position of the vehicle is detected.

Next, the operation will be described with reference to FIG.

When the liquid crystal display 6 is discharged from the fixed case 1 and rises outside the fixed case 1, first, a switch 66 (FIG. 1) provided on the front of the liquid crystal display 6 is turned on. When the switch 66 is turned on, the motor 30 is rotated forward (S2) on condition that the photo sensor 62 detects the moving case 5 (S1).

Then, as shown in FIG. 3, the first gear train 10 is driven, and the movable case 5 moves forward in the fixed case 1 integrally with the liquid crystal display 6.

In this case, the ball differential gear 4
0, the driving force of the motor 30 can be transmitted to the second gear train 20 as well.

However, in this embodiment, a pair of rotation restricting rollers 61 are provided on the upper surface of the liquid crystal display 6. Therefore, when the moving case 5 moves forward in the fixed case 1 integrally with the liquid crystal display 6, the rotation regulating roller 61
Rolls on the top plate 1b, and this becomes mechanical resistance,
The ball bearing 42 provided in the ball differential gear 40 rotates relative speed distribution of the first and second output gears, and transmits the input torque only to the first output gear 43. The transmission of torque to the gear 44 is not performed, the transmission of power to the second gear train 20 is cut off, and the rotation of the liquid crystal display 6 is restricted.

That is, the ball differential gear 4
The torque distribution function of 0 operates, and the torque distribution ratio to the second gear train 20 becomes substantially zero.

When the movable case 5 further advances and reaches the position shown in FIG. 4, the rotation restricting roller 61 comes off the top plate 1b. When this is released, the mechanical resistance applied to the second output gear 44 is released, the power transmission to the second gear train 20 is started, and the rising operation of the liquid crystal display 6 is started.

In this case, the driving force of the motor 30 is transmitted to both the first gear train 10 and the second gear train 20. That is, in this case, the torque distribution ratios to the first gear train 10 and the second gear train 20 are substantially equal.

When the moving case 5 reaches the forward limit position,
After being stopped by a stopper (not shown), it becomes a mechanical resistance, and the ball differential gear 4
0, the torque transmission of the first output gear 43 constituting the first gear train 10 is not performed, whereby the power transmission to the first gear train 10 is interrupted, and only the second gear train 20 is driven, and the liquid crystal display 6 is driven. Rotate. That is, in this case, the first gear train 10
The torque distribution ratio to the motor becomes substantially zero.

Then, as shown in FIG.
Completely start up, on condition that the photo sensor 63 of FIG. 1 detects the moving case 5 and the switch 67 shown in FIG. 7 is turned on (S3), the driving of the motor 30 is stopped (S4). ).

FIG. 7 shows a sensor for detecting the rotation angle of the liquid crystal display 6.

The above-mentioned structure will be described in more detail. A bracket 71 is formed integrally with the movable case 5, and a photo sensor 73 and a black printing portion 74a are provided on a support shaft 72 fixed to the bracket 71. The liquid crystal display 6 is rotatably fitted thereon.

Then, when the liquid crystal display 6 rotates and the rising operation is completed, at the position where the operation is completed,
The photo sensor 73 detects the black print portion 74a and outputs a signal indicating completion of the rising operation. This photo sensor 7
3 and the black printing section 74a constitute the switch 67 of S3.

On the other hand, when storing the liquid crystal display 6 in the fixed case 1, as shown in FIG. 9, a switch 66 (FIG. 1) provided on the front surface of the liquid crystal display 6 is turned on. When the switch 66 is turned on, the motor 30 is rotated in the reverse direction (S6) on condition that the switch 67 is turned on and the photo sensor 63 detects the moving case 5 (S5).

Then, the first gear train 10 and the second gear train 20 are driven together, and the movable case 5 starts to retreat in the fixed case 1 and, as shown in FIGS.
The liquid crystal display 6 rotates from the rising position to the horizontal position.

In the stage shown in FIG. 3, the rotation restricting roller 61 on the upper surface of the liquid crystal display 6 comes into contact with the top plate 1b and rolls thereon, so that the second output gear constituting the ball differential gear 40 is formed. The torque transmission of 44 is not performed, whereby the power transmission to the second gear train 20 is cut off. As a result, the rotation of the liquid crystal display 6 is restricted, and in this state, the movable case 5 and the liquid crystal display 6 are integrated into the fixed case 1 via the first gear train 10 and retreat inside the fixed case 1. Then, it is determined whether or not the photo sensor 62 detects the moving case 5, and the driving of the motor 30 is stopped (S8) on condition that the detection is performed (S7).

In this embodiment, the movement and the rising operation of the liquid crystal display 6 can be controlled by one motor 30 with a simple configuration.

Further, the ball differential gear 40
In addition, since a so-called torque limiter function is provided, the size can be reduced and the space can be saved.

Further, the torque limiter function of the ball differential gear 40 has effects such as prevention of accidents such as pinching of fingers.

Although the present invention has been described based on one embodiment, the present invention is not limited to this.

[0043]

According to the present invention, the movement of the display and the rising operation can be controlled with one motor by a simple structure. Further, since the ball differential gear is provided with a so-called torque limiter function, it is possible to reduce the size and to save the space.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a vehicle-mounted display device according to the present invention.

FIG. 2 is a plan view of a substantially half of the same.

FIG. 3 is a sectional view showing a moving state of the liquid crystal display.

FIG. 4 is a sectional view showing a moving state of the liquid crystal display.

FIG. 5 is a cross-sectional view showing a moving state of the liquid crystal display.

FIG. 6A is an assembly view of a ball differential gear, and FIG.
Is a plan view of the same, and c is an exploded perspective view of a ball differential gear.

FIG. 7 is an exploded perspective view of a moving case and a liquid crystal display.

FIG. 8 is a flowchart when the liquid crystal display is discharged.

FIG. 9 is a flowchart when the liquid crystal display is stored.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed case 5 Moving case 6 Liquid crystal display 10 First gear train 20 Second gear train 30 Motor 40 Ball differential gear 43 First output gear 44 Second output gear 49 Clutch member

Claims (3)

[Claims] 1. An in-vehicle display device having a display inside a fixed case fixed to a vehicle body so as to be movable in and out of the fixed case and to be able to stand up and out of the fixed case. A first gear train for moving the display in and out of the fixed case, a second gear train for raising the display outside the fixed case, and one motor capable of driving the first gear train and the second gear train And a ball differential gear provided between the first gear train and the second gear train and configured such that, when resistance is applied to any one of the gear trains, the torque distribution ratio to each gear train can be arbitrarily changed. And a display device for a vehicle. 2. An in-vehicle display device having a display held inside a fixed case fixed to a vehicle body so as to be movable inside and outside the fixed case and to be able to stand up outside the fixed case. To a moving case, a first gear train for moving the moving case inside the fixed case, a second gear train for raising the display outside the fixed case, a first gear train and a second gear train. One motor that can drive a gear train, and is provided between the first gear train and the second gear train. When resistance is applied to any gear train, the torque distribution ratio to each gear train can be arbitrarily set. A ball differential gear configured so as to be changeable. When the moving case moves within the fixed case, the ball differential gear sets the torque distribution ratio to the second gear train to substantially zero, and the display is fixed. When standing up outside the case, make the torque distribution ratio to the first gear train almost zero,
An in-vehicle display device, wherein a torque distribution ratio between the first gear train and the second gear train is substantially equal at a position intermediate between the two. 3. An in-vehicle display device having a display inside a fixed case fixed to a vehicle body, movably in and out of the fixed case, and capable of rising outside the fixed case. A first gear train for moving the display in and out of the fixed case, a second gear train for raising the display outside the fixed case, and one motor capable of driving the first gear train and the second gear train And a ball differential gear provided between the first gear train and the second gear train and having a clutch function capable of selectively interrupting torque distribution to each gear train. Display device.