JP4184629B2 - In-vehicle display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle display device that is used by hanging a monitor device from a lower surface of a housing attached to a ceiling surface or the like in a vehicle, and in particular, the monitor device is driven by a drive control device using a motor as a drive source. The present invention relates to an in-vehicle display device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an in-vehicle display device in which a monitor device such as a liquid crystal display device (LCD) is pulled out from a front panel (instrument panel) and is standing up is known. After the mounted movable base is advanced in the horizontal direction by a loading mechanism using a motor as a drive source, the monitor device is erected by a loading mechanism using another motor as a drive source at this advanced position. Such a known in-vehicle display device is a type in which the monitor device is projected and retracted with respect to the front panel. In recent years, the monitor device is housed in a housing attached to a ceiling surface or the like in the vehicle, and the monitor device is installed in the housing. There is a demand for a suspension-type in-vehicle display device that is used by projecting downward from an opening provided on the lower surface of the display.
[0003]
In this case, a suspension type in-vehicle display device can be realized by using the driving mechanism provided in the above-described known in-vehicle display device upside down. That is, when the monitor device is in the closed state housed in the housing, the monitor device is slid in the horizontal direction by the loading mechanism and moved from the housed position to the position opposite to the opening, When the monitor device is rotated by the loading mechanism and protrudes downward from the opening, the monitor device is brought into an open state in which the monitor device is suspended from the lower surface of the housing. Further, if the monitor device in the open state is rotated in the reverse direction and returned to the horizontal posture and then slid to the storage position, the monitor device can be stored in the housing and closed. . In general, a power transmission system of a loading mechanism that rotates the monitor device incorporates a gear with a clutch for performing power transmission via a frictional force, which may prevent the monitor device from rotating. When a load is applied, the overload is absorbed by the friction operation of the gear with the clutch.
[0004]
[Problems to be solved by the invention]
By the way, in this type of hanging type in-vehicle display device, when shifting from the open state to the closed state, the monitor device may not return to a horizontal posture due to insufficient torque of the loading mechanism. As a result, when the monitor device is slid to the storage position, a malfunction occurs in which the monitor device hits the periphery of the opening and cannot be returned to the closed state. In this case, if the torque of the loading mechanism is set high, the monitor device can be surely returned to a horizontal posture. The original function of absorbing overload is impaired, which is not preferable.
[0005]
The present invention has been made in view of such a state of the art, and an object thereof is to provide an in-vehicle display device capable of reliably preventing malfunction of a monitor device.
[0006]
[Means for Solving the Problems]
The present invention provides a monitor device provided with a cam portion on one side and a projection on the other side of a housing attached to a ceiling surface or the like in a vehicle and a monitor device capable of moving in and out of the lower surface of the housing. At the time of the closing operation in which the monitor is stored in the housing, the posture of the monitor device is corrected to the horizontal state by the engagement between the cam portion and the protrusion. In this way, when the monitor device that has been rotated is in a slightly forward tilted posture when shifting from the open state to the closed state, when the monitor device is subsequently slid, the cam portion and the protrusion Since the posture of the monitor device is automatically corrected to the horizontal state by the engagement, the monitor device is surely closed without hitting the periphery of the opening.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The in-vehicle display device of the present invention includes a housing having an opening on the lower surface, a drive control device disposed inside the housing, and a monitor device that is rotated and slid by the drive control device, A cam portion is provided on one of the housing and the monitor device, and a protrusion that can be engaged with and disengaged from the cam portion is provided on either one of the housing and the monitor device, and the monitor device is rotated at a drawer position facing the opening. Thus, when the monitor device is slid downward from the opening to be used, and the slide device is slid from the drawer position to the storage position inside the housing, the cam portion and the protrusion The monitor device is configured to correct the posture in a horizontal state by engaging with.
[0008]
According to the vehicle-mounted display device configured as described above, even when the monitor device that has been rotated is in a slightly forward tilted posture during the closing operation of the monitor device, the monitor device is then slid to the storage position. Since the posture of the monitor device is automatically corrected to the horizontal state by the engagement between the cam portion and the protrusion, the monitor device moves to the storage position without hitting the peripheral edge of the opening, and the malfunction of the monitor device is reliably ensured. Can be prevented.
[0009]
In the above configuration, the cam portion has a relatively complicated shape, but since the projection portion needs only a simple shape, the cam portions are opposed to each other on the inner side surfaces of the casing from the viewpoint of design. In addition, it is preferable that the protrusions are provided on the opposite outer surfaces of the monitor device.
[0010]
Further, in the above configuration, it is preferable to provide a cover that is elastically biased in a direction in which a part of the opening is closed on the housing, and the cover is configured to rotate in conjunction with the rotation of the monitor device. When such a cover is provided, the opening of the casing is closed with the monitor device and the cover in the closed state, so that the design can be improved and foreign substances such as dust can be prevented from entering the casing.
[0011]
【Example】
The embodiment will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the closed state of the in-vehicle display device, FIG. 2 is an explanatory diagram showing the open state of the display device, and FIG. It is explanatory drawing which shows the middle state of.
[0012]
In these drawings, reference numeral 1 denotes a housing 1 that forms an outer shell of a vehicle-mounted display device, and the housing 1 is attached to a ceiling surface or the like in the vehicle. A drive control device 2 and a monitor device 3 composed of a liquid crystal display device (LCD) are arranged inside the housing 1, and the monitor device 3 can be rotated and horizontally slid by the drive control device 2. Done. Although not shown, the drive control device 2 includes a movable base that rotatably supports the monitor device 3, a first loading mechanism that uses a motor mounted on the movable base as a drive source, and another motor. A second loading mechanism or the like serving as a driving source is provided, and a gear with a clutch for transmitting power via frictional force is incorporated in the power transmission systems of the first and second loading mechanisms. The first loading mechanism cooperates with the rack to slide the movable base and the monitor device 3 in the horizontal direction, and the second loading mechanism rotates the monitor device 3 with respect to the movable base.
[0013]
Cam portions 4 are provided on opposite inner surfaces of the housing 1, and protrusions 5 that can be engaged with and disengaged from the cam portion 4 are provided on opposite outer surfaces of the monitor device 3. In addition, an opening 6 larger than the outer shape of the monitor device 3 is provided on the lower surface of the housing 1, and the monitor device 3 can be projected and retracted from the opening 6 by the rotation operation of the second loading mechanism. Further, a cover 7 capable of closing about half of the opening 6 is rotatably supported on the lower surface of the housing 1, and the cover 7 is elastically elastically contacted with the back surface of the monitor device 3 by a spring (not shown). It is energized.
[0014]
Next, the operation of the in-vehicle display device configured as described above will be described.
[0015]
In the closed state shown in FIG. 1, the monitor device 3 is housed in a horizontal posture inside the housing 1, and the opening 6 is closed by the monitor device 3 and the cover 7. Therefore, the internal components including the drive control device 2 are covered with the cover 7, so that the design is improved and foreign matters such as dust are difficult to enter the housing 1. When an unillustrated open button is inserted in this closed state, the first loading mechanism of the drive control device 2 starts and slides the monitor device 3, and the monitor device 3 moves to the left from the storage position in FIG. . When the monitor device 3 moves to the drawing position where it does not buffer with the periphery of the opening 6, the first loading mechanism stops at this drawing position, and instead the second loading mechanism of the drive control device 2 starts and the monitoring device is started. 3 is rotated clockwise. As a result, when the monitor device 3 is exposed from the opening 6 of the housing 1 and the monitor device 3 rotates about 120 degrees with respect to the lower surface of the housing 1 as shown in FIG. 2, the second loading mechanism stops. Open state. In this case, since the cover 7 is in contact with the back surface of the monitor device 3, the cover 7 also rotates in conjunction with the monitor device 3. In the present embodiment, the display screen of the monitor device 3 can be adjusted to an optimal viewing angle with respect to the sight line of the passenger, so that the adjustment operation is not disturbed during the opening operation. 1 is operated to move the monitor device 3 forward by a slight amount. Therefore, when such an adjustment operation is not required, the monitor device 3 may be simply rotated by the second loading mechanism at the drawing position.
[0016]
In this way, the monitor device 3 is used in an open state. However, when a close button (not shown) is turned on in this open state, an operation reverse to the above is performed and the monitor device 3 is closed again. That is, first, after the monitor device 3 is moved back by a certain amount by the first loading mechanism, the monitor device 3 is rotated clockwise in FIG. 2 by the second loading mechanism to return to the horizontal posture, and subsequently. When the monitor device 3 is slid to the right by the first loading mechanism, the monitor device 3 moves to the storage position inside the housing 1 as shown in FIG.
[0017]
Here, the frictional force of the gear with the clutch incorporated in the second loading mechanism decreases with time, or the torque of the second loading mechanism becomes inconsistent due to manufacturing variations of the gear with the clutch. When it is sufficient, the monitor device 3 does not return to a horizontal posture in the middle of the above-described closing operation, and is slightly forward tilted as shown in FIG. However, even if the monitor device 3 is tilted forward as described above, if the monitor device 3 is subsequently slid to the storage position by the first loading mechanism, the protrusion provided on the outer surface of the monitor device 3 Since 5 moves along the cam portion 4 provided on the inner surface of the housing 1, the posture of the monitor device 3 is automatically corrected to a horizontal state. Therefore, the monitor device 3 can move to the storage position without hitting the periphery of the opening 6, and the malfunction of the monitor device 3 can be reliably prevented.
[0018]
In the above-described embodiment, the case where the cam portions 4 are provided on the opposite inner surfaces of the housing 1 and the protrusions 5 are provided on the opposite outer surfaces of the monitor device 3 has been described. Conversely, the protrusions 5 provided on the housing 1 may be detachable from the cam portions provided on both outer side surfaces of the monitor device 3.
[0019]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0020]
A cam part is provided on one of a housing attached to a ceiling surface or the like in the vehicle and a monitor device capable of moving in and out of the lower surface of the housing, and a projection is provided on the other. Since the monitor device is configured so that the posture of the monitor device is corrected to the horizontal state by the engagement of the cam portion and the protruding portion during the closing operation stored inside, the monitor device rotated when moving from the open state to the closed state Even if the monitor device is slightly tilted forward, if the monitor device is subsequently slid to the storage position, the monitor device is automatically corrected to the horizontal state by the engagement of the cam portion and the protrusion, and accordingly In this way, it is possible to reliably prevent a malfunction in which the monitor device does not come into a closed state by hitting the periphery of the opening.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram illustrating a closed state of an in-vehicle display device according to an embodiment.
FIG. 2 is an explanatory diagram showing an open state of the display device.
FIG. 3 is an explanatory diagram illustrating an intermediate state during the closing operation of the display device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 2 Drive control apparatus 3 Monitor apparatus 4 Cam part 5 Projection part 6 Opening 7 Cover

Claims (3)

A housing having an opening on the lower surface, a drive control device disposed inside the housing, and a monitor device that is rotated and slid by the drive control device;
A cam portion is provided on one of the housing and the monitor device, and a protrusion that can be engaged with and disengaged from the cam portion is provided on the other,
By rotating the monitor device at a drawing position facing the opening, the monitor device is protruded downward from the opening to be used.
When the monitor device is slid from the pulled-out position to the storage position inside the housing, the posture of the monitor device is corrected to a horizontal state by engagement of the cam portion and the protrusion. An in-vehicle display device. 2. The in-vehicle display according to claim 1, wherein the cam portion is provided on both inner side surfaces facing each other of the casing, and the protrusion is provided on both outer side surfaces facing each other of the monitor device. apparatus. 3. The cover according to claim 1, wherein a cover that is elastically biased in a direction in which a part of the opening is closed is provided on the casing, and the cover rotates in conjunction with the rotation of the monitor device. An in-vehicle display device characterized by that.

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