JP2014041309A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and safety of an image display device capable of using an image display unit in a vertically long state and a horizontally long state.SOLUTION: An image display device can be used in a vertically long state or a horizontally long state by adjusting a position of an image display unit 1. A height adjustment mechanism 3 comprises a stationary mechanism part 4 and a vertical movement mechanism part 5, and is provided to a support post part of a stand 2. The vertical movement mechanism part 5 comprises a lower half part having a built-in locking shaft 13 and spring 25, and an upper half part supporting a tilt adjustment mechanism 6. The tilt adjustment mechanism 6 has a coil spring fitted thereto generating frictional force against a tilt rotation shaft 7 so as to hold the image display unit 1 inclined with an arbitrary angle within a predetermined range. A rotation adjustment mechanism 8 is provided in front of the tile adjustment mechanism 6, and four locking grooves 12 formed at an angle pitch of 90° on a cylinder part 10 and a locking fitting 14 provided to a tip part of the locking shaft 13 are interlocked with each other so as to suppress rotation of the image display unit 1.

Description

  The present invention relates to a support structure and a control mechanism for an image display unit that can be used in a vertically long state and a horizontally long state.

An image display device is used for applications such as television equipment, computer terminals, advertising media, medical equipment, and image production. For example, a monitor device used for applications (graphic related) such as photographs and posters may arrange a rectangular parallelepiped image display unit in a vertically long state or a horizontally long state depending on the content to be displayed and the usage environment.
5A and 5B show examples of a general monitor device, in which FIG. 5A is a diagram in which the screen is in a horizontally long state, and FIG. 5B is a diagram in which the screen is being rotated to a vertically long state. (C) is a side view of the monitor device in the state of (B).

  When the user changes the orientation of the image display unit, the height of the image display unit is adjusted by lifting the image display unit with both hands relative to the stand that supports the image display unit from the state shown in FIG. Further, the user performs tilt adjustment by tilting the image display unit upward, and then rotates the image display unit with both hands to change to a desired posture (see FIGS. 5B and 5C). Thereafter, the user performs height adjustment and tilt adjustment again, and resets the image display unit to a position that is easy to use. At that time, the user should check the instruction manual while keeping the image display unit at the specified height so that the corners of the image display unit do not collide with the stand or the desk or pinch fingers. And need to adjust to tilt. In addition, when the user performs height adjustment or tilt adjustment of the image display unit with one hand, the image display unit may rotate carelessly.

Therefore, in the apparatus disclosed in Patent Document 1, the rotation axis of the image display unit is offset on a 45 ° inclined line passing through the center of the screen, and the height of the lower end of the image display unit is substantially the same in the vertically long state and the horizontally long state. I have to. Even when the image display unit is rotated to the vertical position, a gap with the desktop is ensured. Furthermore, the projection on the back of the monitor is brought into contact with the side surface of the stand column to function as a stopper, and a structure is provided that cannot be rotated unless the image display unit is tilted.
The apparatus disclosed in Patent Document 2 includes a first bevel gear provided on the rotation shaft of the image display unit, and a second bevel gear that meshes with the first bevel gear and accommodates the shaft in the stand column. This device has a structure in which the height adjustment range can be changed depending on whether the stopper interlocked with the second bevel gear lower portion is released or released.

JP 2007-58031 A JP 2006-195217 A

In the prior art, measures for further improving the usability and safety of the image display device are required.
In the structure of Patent Document 1, a projection (boss) on the back surface of the monitor is brought into contact with the side surface of the stand column and used to stop rotation of the image display unit. For this reason, when the tilt adjustment is not sufficient, the front end of the stand column may be touched and damaged. In addition, when the user returns the tilt in the middle of the rotation adjustment of the image display unit, there is a possibility that a finger is caught between the tip of the boss and the front surface of the stand column. When the rotation range of the image display unit exceeds 90 °, the rotation suppression function becomes invalid.
Further, in Patent Document 2, since the stopper does not function during the rotation adjustment of the image display unit, the corner of the image display unit may collide with a pedestal part or a desk, or the user may adjust the height of the image display unit with one hand. There is a risk of inadvertent rotation if performed at

  An object of the present invention is to improve the operability and safety of an image display device that can use an image display unit in a portrait state and a landscape state.

  In order to solve the above-described problems, an apparatus according to the present invention is an image display device including an image display unit and a support unit that supports the image display unit in a state in which the posture of the image display unit can be changed. The height adjusting unit and the tilt adjusting unit of the image display unit provided in the unit, and the latch that locks to the member provided in the image display unit when the image display unit is rotated to the vertically or horizontally long state. Rotation suppression means for suppressing rotation by the means is provided. The rotation suppression means switches from a state in which the rotation of the image display unit is suppressed by the locking unit to a state in which the suppression is released by adjusting the height and the tilt angle of the image display unit.

  According to the present invention, the operability and safety of the image display apparatus can be improved.

FIG. 5 is a side view showing a main mechanism portion of the image display device in a longitudinal section for explaining the embodiment of the present invention in conjunction with FIGS. 2 to 4. It is a rear view which shows the main mechanism parts of an image display apparatus with a longitudinal cross section. It is a figure which shows the longitudinal cross-section of the mechanism part at the time of performing height adjustment. It is a figure which shows the longitudinal cross-section of the mechanism part at the time of performing height adjustment and inclination adjustment further from the state of FIG. It is the external view of the conventional monitor apparatus, and is the front view (A) which shows the use condition which made the screen horizontally long, the front view in the rotation state (B), and the side view in the state of (B) (C). .

Hereinafter, an image display device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a side view of the image display apparatus according to the present embodiment, and FIG. 2 is a rear view of the image display apparatus. 1 and 2 show a state in which the image display unit is arranged horizontally, and the main mechanism is shown in a vertical section. In the following description, the front of the image display device as viewed from the user is defined as the front, and the vertical and horizontal directions viewed from the user are defined in the same manner, and the positional relationship between the units will be described.
The image display unit 1 is a main body of an image display device that displays an image using a display device such as a liquid crystal panel (not shown). The image display device has a structure in which the vicinity of the center of gravity of the image display unit 1 is supported by a stand described later. A power supply board, a signal processing board, a control board, and the like for driving the liquid crystal panel are arranged inside the image display unit 1, and the whole is covered with an exterior member. The stand 2 is a support unit for the image display unit 1 and includes a base unit having an area for stable placement on a desk or the like and a column unit extending in the vertical direction. The base portion includes a steel plate base plate (not shown) having rigidity and weight inside, and rubber feet (not shown) for preventing slipping are disposed around the bottom surface portion.

  The height adjustment mechanism 3 constitutes a column portion of the stand 2 and is used for height adjustment of the image display unit 1. The height adjusting mechanism 3 includes a fixing mechanism portion 4 to be described later and an up-and-down moving mechanism portion 5 that is slidably provided thereon. The fixing mechanism portion 4 is a fixing portion fixed to the pedestal portion of the stand 2, and the vertical movement mechanism portion 5 is a movable portion that can move up and down with respect to the fixing mechanism portion 4. Further, the height adjusting mechanism 3 incorporates a conston spring (not shown) that is generally used in order to maintain the image display unit 1 adjusted to an arbitrary height. The Conston spring has one end attached to the fixing mechanism 4 and the other end attached to the vertical movement mechanism 5.

  The fixing mechanism portion 4 has a substantially prismatic shape that is firmly fixed in the vertical direction with respect to the base portion of the stand 2, and has a functional component in its inner space, but is not shown but is an exterior member. Covered. The vertical movement mechanism unit 5 includes a lower half part that is slidably fitted in the internal space of the fixing mechanism unit 4 and an upper half part that supports a tilt adjustment mechanism 6 described later. ing. In the lower half, functional components to be described later are arranged. In addition, although illustration is abbreviate | omitted, the exterior member which covers the up-and-down moving mechanism part 5 is provided. The top surface portion 5-a is a flat surface portion constituting the top surface of the lower half portion of the vertical movement mechanism portion 5, and an insertion hole for an upper guide 18 described later is formed near the center thereof.

  The tilt adjustment mechanism 6 is a tilt mechanism supported on the upper part of the vertical movement mechanism unit 5. The tilt adjustment mechanism 6 is used when adjusting the tilt state of the image display unit 1, and in this example, the display screen can be arbitrarily adjusted and held within an angle range of about 20 ° upward from the vertical state. . The periphery of the tilt adjustment mechanism 6 is covered with an exterior member separate from the exterior member of the vertical movement mechanism unit 5 (not shown). A coil spring (not shown) for holding the image display unit 1 with frictional force is fitted to the tilt rotation shaft 7. The tilt rotation shaft 7 is disposed in the horizontal direction, and the image display unit 1 can rotate around the tilt rotation shaft 7.

The rotation adjustment mechanism 8 is rotatably fitted and fixed to the tilt adjustment mechanism 6 and has a function of adjusting the orientation of the display screen of the image display unit 1 to a portrait or landscape orientation. Although illustration is omitted, an exterior member that covers the rotation adjustment mechanism 8 is provided. The rotating portion 9 has a circular flange-shaped portion 9a that fits into a groove portion formed in the cylindrical portion of the tilt adjusting mechanism 6, and a lubricant for reducing friction is applied to the sliding surface. The cylindrical portion 10 is a constituent part of the rotation adjusting mechanism 8 and is processed into a cylindrical shape continuous from the flange-shaped portion 9a of the rotating portion 9, and its tip is fixed to a mounting member (VESA metal fitting 26) described later by welding. Has been.
The rotation suppression mechanism 11 is a mechanism that suppresses the rotation of the image display unit 1 by locking the locking metal fitting 14 and a locked portion (a locking groove 12 described later). Since the image display unit 1 can be rotated in a state in which the locking between the two is released, the display image can be displayed in portrait orientation and landscape orientation. In addition, although illustration is abbreviate | omitted, the exterior member which covers the mechanism part of the rotation suppression mechanism 11 is provided.

The locking grooves 12 are through grooves formed at an equal angular interval of 90 ° on the outer peripheral portion of the cylindrical portion 10. As shown in FIG. 1, the plurality of locking grooves 12 are processed so as to be continuous from the outer peripheral portion of the cylindrical portion 10 to the vertical surface portion. The locking shaft 13 is disposed so as to be slidable in the vertical direction with respect to the vertical movement mechanism unit 5. The locking shaft 13 is a metal bar-like member having a functional part to be described later and having a square cross-sectional shape. The locking fitting 14 is a substantially L-shaped fitting composed of a horizontal portion fixed to the upper end portion of the locking shaft 13 and a vertical portion locked to the locking groove 12.
The first protrusion 15 is a convex portion formed in the vicinity of the intermediate portion of the locking shaft 13, and is a defining member for defining the upper end position that slides with respect to the vertical movement mechanism portion 5. As shown in FIG. 1, in the setting position where the height of the image display unit 1 is low, the image display unit 1 is in contact with the inner wall of the top surface part 5-a in the lower space of the vertical movement mechanism unit 5. The second protrusion 16 is a convex portion formed in the vicinity of the lower end portion of the locking shaft 13 and is a defining member for defining a lower end position that slides with respect to the vertical movement mechanism portion 5. At the setting position where the height of the image display unit 1 is low, the second protrusion 16 does not come into contact with other functional parts in the lower space of the vertical movement mechanism unit 5.

The movable hook 17 is a convex portion formed in the vicinity of the lower end portion of the locking shaft 13 and serves as a mounting portion for a biasing member that biases the locking shaft 13 upward. This urging member is a spring 25 described later, and the movable side hook 17 has a substantially L shape for hooking the spring 25.
The upper guide 18 is fixed to the penetrating portion provided in the top surface portion 5-a at the lower half portion of the vertical movement mechanism portion 5 by caulking. The flange portion constituting the circumferential portion of the upper guide 18 is a positioning portion for the up-and-down moving mechanism portion 5, and is inserted into the through-hole formed inside in a state where the locking shaft 13 can slide in the up-down direction. doing. Note that the through hole as a restricting means for preventing the locking shaft 13 from rotating has a quadrangular cross-sectional shape in accordance with the cross-sectional shape of the locking shaft 13.
The lower guide 19 is a member fixed to the inner side surface portion in the vertical direction by caulking at an intermediate portion in the lower half portion of the vertical movement mechanism portion 5. A through hole for inserting the locking shaft 13 so as to be slidable in the vertical direction is formed at the tip portion that protrudes horizontally. The locking shaft 13 is positioned in a vertically slidable state by being supported at two locations, the upper guide 18 and the lower guide 19.

The rising end defining portion 20 is a convex portion formed outward at the lower end of the lower half of the vertical movement mechanism portion 5. The rising end defining portion 20 does not come into contact with other functional parts in the space in the fixing mechanism portion 4 at the setting position where the height of the image display portion 1 is low.
The fixed-side hook 21 is a substantially L-shaped portion fixed to an inner wall surface extending in the vertical direction in the lower half of the vertical movement mechanism unit 5. The fixed-side hook 21 has a function of hooking one end of a spring 25 to be described later that biases the locking shaft 13. The locking bearing 22 is a convex portion provided on a vertical surface of the internal space of the fixing mechanism portion 4. The vicinity of the base of this convex part penetrates the side wall of the lower half part of the vertical movement mechanism part 5, and the vicinity of the tip of the convex part comes into contact with the second protrusion 16 when the locking shaft 13 is raised.

The groove 23 is a through-hole provided in the side wall of the lower half of the vertical movement mechanism unit 5 and is a relief hole extending in the vertical direction so as not to contact the locking bearing 22. The rising end receiving portion 24 is a convex portion formed on a vertical surface inside the fixing mechanism portion 4. This is the portion where the rising end defining portion 20 abuts in order to define the ascent limit of the vertical movement mechanism portion 5. The spring 25 is a tension coil spring for urging the locking shaft 13 upward with respect to the vertical movement mechanism unit 5. The spring 25 has a lower end hooked on the movable hook 17 and an upper end hooked on the fixed hook 21.
The VESA (Video Electronics Standards Association) metal fitting 26 is a plate-like part manufactured based on the VESA standard. The tip of the cylindrical portion 10 is fixed to the back surface of the VESA metal fitting 26 by welding, and the front surface portion is brought into close contact with the back surface portion of the image display portion 1 and fastened with screws (not shown). Fixed to the stand 2. The plurality of fastening portions 27 have screw holes formed at four corners of the VESA fitting 26 in order to fix the image display portion 1 to the stand 2.

The operation of the rotation suppressing mechanism having the above-described configuration will be described with reference to FIGS.
FIG. 3A shows a state in which the display screen of the image display unit 1 is horizontally long and the height is adjusted low. At this time, in the rotation suppression mechanism 11, the first protrusion 15 is restricted by the top surface portion 5-a, and the locking shaft 13 biased upward by the spring 25 has an upper limit relative to the vertical movement mechanism portion 5. Is located. The engagement amount 30-a between the engagement fitting 14 and the engagement groove 12 is sufficient, and the operation of the rotation adjusting mechanism 8 is suppressed. That is, the image display unit 1 cannot be rotated.

  FIG. 3B shows a state in which the height of the image display unit 1 is increased by a certain amount. Although the relative position of the up-and-down moving mechanism unit 5 is changed with respect to the fixing mechanism unit 4, the rotation suppression mechanism 11 is held in the same positional relationship as that in FIG. The locking amount 30-a between the locking metal fitting 14 and the locking groove 12 does not change, and the operation of the rotation adjusting mechanism 8 is restricted and the image display unit 1 cannot rotate. However, since the second protrusion 16 is in a position in contact with the locking bearing 22, the locking shaft 13 does not rise even if the vertical movement mechanism portion 5 is further raised. That is, the upper limit position in the movement range of the locking shaft 13 is defined by the position defining means including the second protrusion 16 and the locking bearing 22.

  FIG. 4C shows a state where the height of the image display unit 1 has been raised to the highest position. Since the rising end defining portion 20 is in contact with the rising end receiving portion 24, the vertical movement mechanism portion 5 cannot move up any further. Since the locking shaft 13 remains stopped from the state shown in FIG. 3B, the first protrusion 15 is separated from the top surface portion 5-a and the spring 25 is extended. Further, the position of the locking groove 12 with respect to the locking fitting 14 is changed, and the amount of locking of both is reduced from 30-a to 30-b.

  FIG. 4D shows a state in which the height of the image display unit 1 is maintained at the uppermost position, and the lower end portion of the image display unit 1 is tilted forward by tilt adjustment. Since the cylindrical portion 10 is tilted, the locking fitting 14 is detached from the locking groove 12, and the gap amount 30-c is substituted for the locking amount 30-b, and the suppression of the operation of the rotation adjusting mechanism 8 is released. That is, the image display unit 1 can rotate around the central axis of the rotating unit 9. When the user starts to rotate the image display unit 1, the locking fitting 14 is located near the surface of the cylindrical unit 10. In this state, even if the user operates to return to the original tilt by adjusting the tilt of the image display unit 1, it is impossible because the locking fitting 14 contacts the cylindrical unit 10. When the user rotates the image display unit 1 at an angle of 90 ° and reaches a position where the locking metal fitting 14 matches the new locking groove 12, the image display unit 1 is in a vertically long posture state. In this state, an operation of returning to the original tilt by tilt adjustment is possible, and the positional relationship of the rotation suppression mechanism 11 when the image display unit 1 returns to the vertical state is the same as that in FIG. At this time, the locking fitting 14 is locked again in the locking groove 12. Thereafter, if the user operates the vertical movement mechanism unit 5 to lower it, the state returns to the state of FIG. 3A through the state of FIG. 3B (however, the screen is in a vertically long state).

  In the above-described operation, the case where the image display unit 1 is changed from the horizontally long state to the vertically long state has been described. On the contrary, when the image display unit 1 is changed from the vertically long state to the horizontally long state, FIG. And the procedure similar to that described in FIG. In the above description of the operation, it is assumed that the tilt adjustment is performed after the height adjustment in the release procedure of the rotation suppression mechanism 11. However, the procedure of performing the height adjustment after performing the tilt adjustment first also functions similarly. .

The configuration and functions of the present embodiment described above are summarized in the itemized list below.
1. The height adjusting mechanism 3 constituted by the fixing mechanism portion 4 and the up-and-down moving mechanism portion 5 slidably fitted is provided on the column portion of the stand 2. Further, the image display unit 1 can be held at an arbitrary height by a Conston spring.
2. The vertical movement mechanism 5 is configured by a lower half that houses a part of the locking shaft 13 and the spring 25, and an upper half that supports the tilt adjustment mechanism 6.
3. The tilt adjusting mechanism 6 can hold the image display unit 1 tilted upward from a vertical state within a predetermined angle range, and the tilt rotating shaft 7 is fitted with a coil spring that generates a frictional force. .
4). By providing a rotation adjustment mechanism 8 that is fitted and fixed in a rotatable manner in front of the tilt adjustment mechanism 6, the image display unit 1 can be rotated and adjusted in a vertically long state or a horizontally long state.
5. The VESA metal fitting 26 and the cylindrical part 10 which are supported from the back surface of the image display part 1 are provided.
6). The cylindrical portion 10 of the rotation adjusting mechanism 8 is formed with four locking grooves 12 at an angle pitch of 90 °, and the locking metal fittings provided at the tip of the locking shaft 13 are formed in these locking grooves. 14 is locked (by this, rotation of the image display unit 1 can be suppressed).

7). The locking shaft 13 is provided with a first protrusion 15 in the vicinity of the middle portion and a second protrusion 16 in the vicinity of the lower end portion. The former protrusion 15 is in contact with the top surface portion 5-a to define the position of the locking shaft 13, and the latter protrusion 16 is in contact with the locking bearing 22 to define the position of the locking shaft 13.
8). The locking shaft 13 is supported by an upper guide 18 provided on the top surface portion 5-a of the vertical movement mechanism 5 and a lower guide 19 provided in the lower space so as to be slidable in the vertical direction. The locking shaft 13 has a quadrangular cross section, and the through holes of the upper guide 18 and the lower guide 19 have a quadrangular cross section, and have a function of preventing rotation of the locking shaft 13.
9. A spring 25 is stretched between the fixed side hook 21 provided on the vertical movement mechanism unit 5 and the movable side hook 17 provided on the locking shaft 13, so that the locking shaft 13 is connected to the vertical movement mechanism unit 5. Always be biased upward.
10. The upper limit position of the vertical movement mechanism unit 5 is defined by the contact between the rising end defining part 20 provided at the lower end of the vertical movement mechanism part 5 and the rising end receiving part 24 formed in the fixing mechanism part 4. about.

With the above configuration, the following effects can be obtained in the image display apparatus having the height adjustment mechanism 3, the tilt adjustment mechanism 6, and the rotation adjustment mechanism 8 of the image display unit 1.
1. In a normal use state of the image display unit 1, rotation is restricted in a portrait or landscape orientation, and rotation restriction is released at a predetermined height and tilt angle. Do not collide with the desk.
The cylindrical portion 10 of the rotation adjusting mechanism 8 is provided with a locking groove 12 at an angular pitch of 90 ° as a locked portion, and is locked with a locking metal fitting 14 provided on the locking shaft 13 so as to prevent rotation. 11 is configured. The locking shaft 13 to which the locking metal fitting 14 is fixed can change the relative position with respect to the cylindrical portion 10 by adjusting the height and tilt amount of the image display unit 1.
2. Since the image display unit 1 is prevented from rotating in a normal use position, that is, in a state where the locking metal fitting 14 is locked in any of the locking grooves 12, it should not rotate carelessly.

3. Since the rotation suppression mechanism 11 is covered with exterior parts, even if the tilt adjustment is insufficient and rotation starts, the appearance of the image display device should not be damaged.
4). Even if the user returns the tilt adjustment tilt during the rotation of the image display unit 1, the cylindrical portion 10 of the rotation adjustment mechanism 8 and the locking metal fitting 14 come into contact with each other, and the space between the image display unit 1 and the support column portion of the stand 2. There will be enough space to keep your fingers away.
5. Even if the user attempts to lower the height while the image display unit 1 is rotating, the cylindrical portion 10 of the rotation adjusting mechanism 8 and the locking metal fitting 14 come into contact with each other, and the image display unit 1 does not lower. Sufficient clearance should be maintained between the desk and the desk.

DESCRIPTION OF SYMBOLS 1 Image display part 2 Stand 3 Height adjustment mechanism 6 Tilt adjustment mechanism 8 Rotation adjustment mechanism 9 Rotation part 10 Cylindrical part 11 Rotation suppression mechanism 12 Locking groove 13 Locking shaft 14 Locking metal fitting 25 Spring 26 VESA metal fitting

Claims (8)

An image display device comprising an image display unit and support means for supporting the image display unit in a state in which the posture of the image display unit can be changed,
A height adjusting unit and a tilt adjusting unit of the image display unit provided on a support column of the supporting unit;
When the image display unit is rotated to a vertically or horizontally long state, the image display unit includes a rotation suppression unit that suppresses rotation by a locking unit that is locked to a member provided in the image display unit,
The rotation suppression means switches from a state in which the rotation of the image display unit is suppressed by the locking unit to a state in which the suppression is released by adjusting a height and an inclination angle of the image display unit. Image display device.   2. The height adjusting means has a movable part and a fixed part that supports the movable part, and the tilt adjusting means and the rotation suppressing means are provided in the movable part. The image display device described in 1. The rotation suppression means further includes
A locked portion that is formed on a member provided in the image display portion and locks with the locking means;
The image display apparatus according to claim 1, further comprising an urging unit that urges the locking unit in a direction in which the locking unit is locked to the locked portion. The image display unit includes a flange-shaped portion that fits into a groove formed in the tilt adjusting means, and a rotating portion that is constituted by a cylindrical portion continuous from the flange-shaped portion,
The locked portion is a plurality of locking grooves formed in the cylindrical portion. When the locking means is removed from the locking groove, the image display portion is rotated around the central axis of the rotating portion. The image display device according to claim 3, wherein the image display device is capable of rotating.   The cylindrical portion is fixed to the image display portion by an attachment member, and the plurality of locking grooves are formed at an angular interval of 90 ° around the central axis of the rotating portion. The image display device according to claim 4, wherein   The image display according to any one of claims 1 to 5, wherein the tilt adjustment unit holds the image display unit at an arbitrary angle when adjusting the tilt state of the image display unit. apparatus.   The said latching means has a latching shaft supported in the state which can move to an up-down direction with the guide provided in the said height adjustment means, The one of Claim 1 to 6 characterized by the above-mentioned. Image display device. The image display device according to claim 7, further comprising a defining unit that defines a movement range of the locking shaft and a regulating unit that regulates rotation of the locking shaft.

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