JPH04339042A - Screen supporting device - Google Patents

Abstract

PURPOSE:To achieve with less force a rotating/stopping operation of a liquid crystal television screen or a monitor device screen which is loaded in a car or the like where outside vibration is large and improve utility of the device. CONSTITUTION:A screen 3 is fixed to a frame 3 in a rotatable manner through a screen rotating shaft 8, a serration 7 with its center being at the screen rotating shaft 8 is arranged on the side of the screen 3 in a fixed manner, and engaged with a rotatable rack 6 which is provided to the side of the screen 3, and engagement is held by means of a spring 9. Engagement of the serration 7 with the rack 6 is disengaged against the force of the spring 9 and the screen 3 can be easily rotated, facilitating rotation of the screen 3.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is an image display part support device for rotating an image display part of a liquid crystal television, display, etc. and stopping it at a rotated position, which is installed in a place affected by external vibration such as in a vehicle. Regarding the structure and mechanism of

0002

[Conventional Example] A conventional support device for an image display part (hereinafter referred to as a screen) of an in-vehicle TV or display has a rotating shaft that receives the gravity of the entire frame of the screen. There are some that obtain the necessary braking force to stand still. A first conventional example of this type of device will be described with reference to FIGS. 7 and 8. In the figure, 51 is a panel fixed to the rear of the car seat etc. with screws (not shown), and 52 is a screen.
3 is a frame surrounding the screen 52 and the panel 5 together with the screen 52.
1, a shaft 54 is provided so as to rotate in the direction of the arrow in the figure, 55 is a rubber covering the shaft 54 with a cylinder, and 56 is a bearing whose inner diameter part 56b is the outer diameter of the rubber 55. The ends thereof are fixed to the panel 52a. When the screen support device having the above structure is rotated in a direction where the screen 53 is easily viewed (in the direction of the arrow in the figure), the shaft 54 and the rubber 5
3. A braking force is exerted by the sliding movement of the bearing 56 and the rubber 53, so that it remains stationary at that position. As a second conventional example of this type of device, although it is not for automotive use, the NEC technique V
OL. 43 NO., 9/1990, pages 17 and 18, ``4. About the tilt mechanism'' of ``Living Space Proposal Type Design Television'' can be mentioned.

0003

[Problems to be Solved by the Invention] In the first conventional example of the above-mentioned prior art, the gravity direction of the center of gravity of the screen 52 and the frame 53 and the rotation center of the shaft 54 and the bearing 56, which are the rotation centers, and the gravity direction are different. If there is a distance in the direction perpendicular to gravity, a rotational force acts on the panel 51 in the direction of the arrow in the figure, making it impossible to keep the screen 52 stationary.
4 or by increasing the contact area of the bearing 56 or increasing the amount of deformation of the rubber 55 to brake its rotational force. For this reason, the braking force required to manually rotate the screen 52 or the frame 53 is large, resulting in a problem that the operating force becomes large and the operation becomes difficult.

Furthermore, in the second conventional example, it is not possible to directly operate the screen or frame, and it is necessary to turn a handle provided on the leg of the stand on which the screen and frame are mounted, making it difficult to operate. There were problems in that it was time-consuming and the device was too large, making it impossible to implement it for in-vehicle use. An object of the present invention is to provide a screen rotation support device for a television or display that is compact and can be mounted in a vehicle, etc., which can keep a rotating screen still even when installed in a place with a lot of external vibration, can rotate with little operating force, and can be mounted on a vehicle. There is something to do.

[0005]

[Means for Solving the Problems] In order to achieve the above object, a shaft is provided on the left and right side surfaces of a frame that rotatably supports the screen, and an arc-shaped tooth profile centered on the shaft is provided, and the frame rotatably supports the screen. A rack is provided on a lever that can be rotated to the left and right of the screen, and the lever is urged by a spring or the like to engage the gear and the rack provided on the lever.

[0006]

[Operation] When the lever is manually pressed in a direction opposite to the direction in which the spring is biased, the rotation of the lever breaks the connection between the tooth profile and the rack, so that the screen is free relative to the frame. When the manual pressure is released from the lever, the lever rotates in the biasing direction of the spring, the gear and rack engage, and the frame Fixed to the screen.

[0007]

[Embodiment] An embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a front view of an example in which a bus-mounted LCD television according to an embodiment of the present invention is installed on the back of a bus chair.
2 to 5 are cross-sectional views taken along the line II in FIG. 1, showing the main parts of the present invention. In each figure, 1 is a chair, 2 is a frame, 3 is a screen, 4 is a case surrounding the screen 3, 5 is a lever, 6 is a rack, 7 is a tooth profile, 8 is a screen rotation axis, 9 is a spring, and 10 is a lever rotation shaft.

[0009] Each of the above constituent parts will be explained below.

The frame 2 is fixed to the chair 1 with screws or the like (not shown), and the screen 3 is fixed to the case 4.
The screen 4 is rotatably supported relative to the frame 2 via a screen rotation shaft 8, so that the screen 3 is rotated relative to the frame 2.
The screen is rotated around the screen rotation axis 8 relative to the screen. Further, the tooth profile 7 is fixedly provided on the left and right sides of the frame 2 with the screen rotation axis 8 as the center. On the other hand, a lever 5 that rotates about a lever rotation shaft 10 on the left and right sides of the case 4 is fixedly provided with a shell 6 and the toothed shape 7 are urged by a spring 9 and engaged, and the "lever" When the operating section of 5 is tilted forward, the toothed shape 7 disengages from the rack 6, so by rotating the lever 5, the screen 3 can be rotated around the screen rotation axis, and the screen 3 can be rotated at any position. When the operation of ``tilting the operating portion of the lever 5 forward'' is stopped, the teeth 7 and the rack 6 are engaged with each other by the spring, so that the screen 3 is stopped relative to the frame 2 at that position.

The operation in which the screen 3 and the frame 2 are stopped at an arbitrary position centering on the rotating shaft 8 by the above-mentioned elements will be explained below with reference to FIGS. 2 to 5.

FIG. 2 shows a state in which the screen 3 is held vertically by the engagement of the rack 6 and the tooth profile 7. In the same figure, when the lever 5 is manually pulled in the direction of the arrow (A) in the figure, the rack 6 is held vertically. In the figure, the lever is centered around the lever rotation axis 10.
5 in the counterclockwise direction, the connection between the tooth profile 7 and the rack 6 is severed, and the screen 3 becomes in the state shown in FIG.

In this state (the state shown in FIG. 3), move the lever 5 toward you.
When you pull the service case 4 toward you, the longitudinal rotation axis 8
The screen 3 rotates around , and enters the state shown in FIG.

When the lever 5 is released, it rotates clockwise due to the restoring force of the spring 9, and the tooth profile 7 and the rack 6 engage with each other, so that the screen 3 remains stationary relative to the frame 2 as shown in FIG. Ru. Even if vibration is applied at this position, the screen 3 will not vibrate relative to the frame 2 since the gear 7 and the rack 6 are engaged. Further, as an applied embodiment of the present invention, as shown in FIG. 6, the lever 5 is separated into a first lever 5b and a second lever 5c, and a gap S is provided so that the second lever is This also includes a system in which vibration is not transmitted to the first lever 5b but the engagement between the tooth profile 7 and the rack 6 is affected.

[0015]

Effects of the Invention According to the present invention, the case containing the screen and the frame fixed to the chair are engaged at arbitrary positions by the tooth profile and the rack, so that the screen remains stable even when used in a place where there is vibration. Since it is firmly fixed to the frame and the rotational force of the screen can be reduced by the engagement of the teeth and the rack, it is possible to easily rotate and hold the screen in a position where it can be easily viewed in a place where there is vibration, such as when mounted on a vehicle.

[Brief explanation of drawings]

FIG. 1 shows a front view of a screen support device for a bus-mounted liquid crystal television according to an embodiment of the present invention.

FIG. 2 shows a cross-sectional view taken along line II in FIG. 1;

FIG. 3 shows a cross-sectional view taken along line II in FIG. 1;

FIG. 4 shows a cross-sectional view taken along line II in FIG. 1;

FIG. 5 shows a cross-sectional view taken along line II in FIG. 1;

FIG. 6 is a sectional view showing an applied example of a screen support device for a bus-mounted liquid crystal television according to an embodiment of the present invention.

FIG. 7 shows a sketch of a conventional example.

FIG. 8 shows a sketch of a conventional example.

[Explanation of symbols]

1...Chair 2...Frame 3...Screen 4...Case 5...Lever 6...Rack 7...Tooth profile 8...Screen rotation axis 9...Spring 10...Lever rotation axis

Claims (2)

[Claims] Claim 1: Rotating an axis parallel to the horizontal direction of the image display surface (image display surface is abbreviated as screen) of a liquid crystal television, liquid crystal monitor, or cathode ray tube television mounted on a moving object such as a vehicle or bus. Shafts (or bearings) are provided on the left and right sides of the screen for rotating a rotating body in the front-rear direction, including the screen as a center, and bearings (or shafts) rotatably engaged with the left and right shafts (or bearings). The frame is provided with an arc-shaped tooth profile centered on the rotation axis on the left and right side surfaces of the frame, and a rack is provided on the side surface of the case that supports or covers the screen. A lever is provided which is biased by a spring and has a rotating shaft, and by engaging the rack and the tooth profile by the bias of the spring, the screen is moved from the frame to the lever.
the tooth profile and the rack are brought into engagement by keeping the lever stationary relative to the rack, and rotating the lever about the rotation axis of the lever by manual operation or the like in a direction opposite to the biasing direction of the spring; A screen support device characterized in that the screen and the frame are freely rotatable. 2. The screen support device according to claim 1, wherein one end of the screen is attached to the frame so that an elastic force is generated in the direction of gravity of the rotating body including the screen. A screen support device comprising: a spring whose other end engages with a side surface of a rotating body including the screen.