JP2014047859A - Image display device and its support equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a user's requirement for work at an image display device having a stand enabling an image display part to be turned in a rightward or leftward direction in which a front face direction and a front face direction of the stand should be aligned to each other in the case that the image display device is transported or installed.SOLUTION: There is provided a support equipment for supporting an image plane of an image display device that comprises a base part to be mounted at an installation surface, a rotary part assembled in such a way that it can be turned around a vertical axis to an installation plane for the base part and turned in a clockwise direction or a counter-clockwise direction around a predetermined center position by a predetermined angular range, a strut part fixed to the rotary part to support an image plane, a first energization part for generating an energization force for rotating the rotary part in a predetermined direction and a second energization part for generating an energization force for rotating the rotary part in a direction opposite to the predetermined direction.

Description

  The present invention relates to an image display device and a support device thereof.

  Monitors (image display devices) are used for applications such as televisions, computer terminals, advertising media, medical equipment, and image production.

  Among these monitors, there are products in which a stand that supports an image display unit is equipped with a left-right rotation (swivel) mechanism. The orientation of the screen can be changed to an arbitrary angle up to a predetermined left and right angle. On the other hand, the shape of the base portion (installation portion) of the stand includes various shapes such as a rectangle, a circle, and a V shape when viewed from above.

  FIG. 5 is a diagram conceptually showing an example of a monitor, which is represented by a cross section obtained by cutting the lower portion of the stand column, (A) is a use state in which the image display unit is rotated 50 ° to the left, and (B). Represents a state in which the user carries the monitor and places the image display unit on another desk with the image display unit facing forward.

The monitor 50 is a device with a built-in liquid crystal display panel, and supports the image display unit 51 with a stand column 54.
The stand base 52 is a pedestal portion that stably supports the entire mass of the image display unit 51 and has a circular shape when viewed from above.
The stand rotating part 53 is a member that is rotatably fitted in the central opening of the stand base 52 and joins the stand column 54 on the upper surface.

A screen front direction 55 indicates a front direction when an observer observes a display image of a thin display panel built in the image display unit 51.
The stand front surface 56 is a virtual point that represents the center when the stand rotating unit 53 rotates 60 degrees to the left and right. When the rotation position of the stand rotating unit 53 is in the center, the stand column 54 is in a positional relationship facing the stand front surface 56 and coincides with the screen front direction 55.

The right rotation limit 57 is a virtual point that represents the maximum angle at which the stand rotating unit 53 can rotate in the right direction. Although not shown in the drawing, a rotation limiting means is provided.
The left rotation limit 58 is a virtual point that represents the maximum angle at which the stand rotating unit 53 can rotate leftward.

  There are two reasons for limiting the angle for the left-right rotation. First, the position of the center of gravity of the image display unit 51 may change depending on the angle, so that the fallability may change. Secondly, although not shown in the drawing, a power cable or a signal cable is connected to the back of the image display unit 51, and if the rotation angle is increased, stress may be applied to the connection unit, which may affect the reliability. It is.

Next, an example of using the monitor will be described on the assumption that a plurality of users are simultaneously editing while viewing the display image on the monitor 50.
First, in order to align the orientation of the image display unit 51 with the user sitting on the left side, the user rotated left by 50 ° as shown in FIG.

The power was turned off while maintaining this rotation state, and the monitor 50 was requested to “move to the desk in the next room” by another user.
The requested user lifts the left and right bottom surfaces of the image display unit 51 of the monitor 50 and carries it after disconnecting the PC or AC outlet, and places the image display unit 51 on the front of the desk on the designated desk. I left it. FIG. 5B shows the positional relationship between the stand base 52 and the image display unit 51 at that time.

  A plurality of previous users again started editing using the monitor 50. If rotation is started to the left from the state shown in FIG. 5B in order to match the orientation of the image display unit 51 to the user sitting on the left side, the rotation is restricted at a position rotated about 10 °.

  Therefore, one worker picks up the left and right bottom surfaces of the image display unit 51, and in this state, another worker searches the virtual position of the stand front surface 56 of the stand base 52, and the stand front surface 56 faces the front of the desk. Thus, the monitor 50 was placed on the desk again. At this time, since the installation state of the monitor is the state shown in FIG. 5A, the image display unit 51 can be rotated by 60 ° left and right from the front direction of the desk.

  Patent Document 1 discloses a stand structure that can rotate left and right for a CRT monitor. FIG. 6 shows the main configuration of the prior art described in Patent Document 1. The lower circular part and the rotation support base 60 in the figure correspond to the stand base 52 shown in FIG. 5, and the upper circular part turntable 61 in the figure corresponds to the stand rotating unit 53 shown in FIG. .

In this configuration, when the CRT monitor is positioned in front of the stand, the convex spherical surface 62 provided on the back surface of the turntable 61 is formed in the groove formed by the two ribs 63 and 64 provided on the surface of the turntable 60. Fit.
If the CRT monitor is rotated left or right from the front of the stand and then returned to the front, the convex spherical surface 62 is impacted into the groove formed by the two ribs 63 and 64 (technical terms It can be seen that the front of the CRT monitor and the stand coincide with each other.

  In the prior art shown in Patent Document 1, place the monitor on the desk once at the time of installation, slowly rotate the CRT monitor to the left or right, check the front direction of the stand with a click feeling, lift the CRT again and place it. It is necessary to fix, and the installation workability is not good.

  When the stand base is rectangular or V-shaped when viewed from above, the front direction of the stand can be confirmed. However, the stand base part turns when transporting with the left and right bottom surfaces of the image display part, and another worker corrects the direction of the stand base part when placing it on a desk or storing it in a packing box. Needs may arise.

JP 2000-346284 A

  The prior art has the following problems. In an image display device that can adjust the image display unit to the left and right, with the circular stand design on the market, the stand front direction on the exterior is not known, and as shown in the previous example, the installation method was mistakenly set to the left and right. In some cases, the rotation could not be adjusted.

  Accordingly, the present invention provides an image display device having a stand that can rotate the image display unit in the left-right direction so that the user does not need to perform the work of aligning the front direction of the screen and the front direction of the stand during transportation or installation. With the goal.

The present invention is a support device for supporting the screen of the image display device,
A base for mounting on the installation surface;
A rotating part that is rotatably assembled around an axis perpendicular to the installation surface with respect to the base part, and that rotates in a predetermined angular range clockwise and counterclockwise around a predetermined reference position;
A support column fixed to the rotating unit and supporting the screen;
A first urging unit that generates an urging force to rotate the rotating unit in a predetermined direction;
And a second urging unit that generates an urging force that rotates the rotating unit in a direction opposite to the predetermined direction.

  According to the present invention, in the image display device having a stand capable of rotating the image display unit to the left and right, the user needs to perform the work of aligning the front direction of the screen with the front direction of the stand during transportation or installation. Can not be.

The perspective view which expressed the stand mechanism part of the first embodiment in a longitudinal section A perspective view of the stand mechanism portion of the first embodiment viewed from above. A perspective view of the stand mechanism portion of the second embodiment viewed from above. A perspective view of the stand mechanism portion of the third embodiment viewed from above. A perspective view of the conventional stand mechanism from above Plane perspective view of conventional stand mechanism

Example 1
FIG. 1 is a perspective view of the main stand mechanism portion of the image display device representing the features of the present embodiment, which is expressed in a longitudinal section. 2A and 2B are perspective views of the stand mechanism portion of the image display apparatus according to the present embodiment as viewed from above. FIG. 2A is a state in which the image display unit indicated by a broken line is rotated leftward, and FIG. Is expressed with the front facing the observation side. The characteristic structure of the present embodiment will be described with reference to both drawings.

The image display device 1 is a device that displays an image based on an image signal from an image output device such as a PC using a thin image display panel, and includes an image display unit 2 and a stand 3 described later.
The image display unit 2 is a main body of an image display device that displays an image using a liquid crystal panel (not shown), and has a structure in which the vicinity of the center of gravity is supported by a stand 3 described later. Inside, an electric board (not shown) such as a power supply board, a signal processing board, and a control board for driving the liquid crystal panel is built, and the whole is covered with an exterior.

The stand 3 is a loading table for supporting the image display unit 2, and the lower part is composed of a stand base unit for stably mounting on an installation surface such as a desk, and a support column extending vertically.
The stand column 4 has an elevating mechanism (not shown) inside and has a height adjusting mechanism for the image display unit 2, and a tilt mechanism for adjusting the tilt of the image display unit 2 at the top (see FIG. (Not shown).
The stand base fixing part 5 incorporates a left / right rotation mechanism to be described later, and the surface is a resin part having appearance, and has a circular design when viewed from above.

The stand rotating part 6 is a part having a metal disk shape located in an opening provided in the central part of the stand base fixing part 5. The stand rotating part 6 has a stand column 4 on the upper surface with screws (
The periphery of the side surface is rotatably fitted to the stand base fixing portion 5 and further supported by a chassis 7 described later at a part of the lower surface. The stand rotating unit 6 is assembled to the stand base fixing unit 5 so as to be rotatable about an axis perpendicular to the installation surface.

The chassis 7 is a metal plate located on the inner bottom surface portion of the stand base fixing portion 5 and is coupled to the stand base fixing portion 5 by screws (not shown). Several functional structures are formed by pressing, and a thin rubber member (not shown) is bonded to the lower surface to prevent slipping.
The support portion 8 is an annular part fixed to the upper surface of the chassis 7 by welding, and a rib extending upward is formed around the flat portion of the upper surface, and a sliding member described later is incorporated.

The rotation stopper 9 is a metal shaft part fixed to the chassis 7 by caulking. In order to restrict the operating range of the stand rotating unit 6, a spring-loaded rotating unit 12 (14), which will be described later, moves leftward (rightward). It is provided at a position where it comes into contact when rotated 90 °. That is, the stand rotating unit 6
Rotates in a predetermined angular range clockwise and counterclockwise around a predetermined reference position.

The spring hook fixing portion 10 is a structural component protruding from the wall portion on the rear side of the stand base fixing portion 5 and is fixed to the chassis 7 with metal fittings and screws (not shown) for reinforcement. A through hole is formed near the center of the protruding shape, and has a function of hooking two springs described later.
The sliding member 11 has a function of reducing the force required for the rotating operation of the stand rotating unit 6 by forming a resin having a small friction coefficient, for example, a resin such as POM (polyacetal) in an annular shape and incorporating it into the support unit 8. .

The spring-loaded rotating part 12 is an L-shaped metal part protruding outward from the bottom surface of the stand rotating part 6, and is located on the right side when viewed from the front of the stand rotating part 6.
The spring right 13 is a tension coil spring supported at both ends by the spring hook fixing portion 10 and the spring hook rotating portion 12, and always biases the stand rotating portion 6 rightward (counterclockwise as viewed from above). ing. The spring right 13 is a first urging unit that generates an urging force that rotates the stand rotating unit 6 in a predetermined direction.

The spring-loaded rotating part 14 is an L-shaped metal part protruding outward from the bottom surface of the stand rotating part 6, and is located on the left side when viewed from the front of the stand rotating part 6.
The spring left 15 is a tension coil spring supported at both ends by the spring hook fixing portion 10 and the spring hook rotating portion 14, and always biases the stand rotating portion 6 leftward (clockwise as viewed from above). Yes. The spring left 15 is a second urging unit that generates an urging force that rotates the stand rotating unit 6 in a direction opposite to a predetermined direction.

  The spring guide 16 has a shape in which a smooth surface protrudes outward at a position along the spring right 13 and the spring left 15 around the lower surface of the stand rotating portion 6, and expands and contracts according to the movement of the stand rotating portion 6. The spring right 13 and the spring left 15 have a function of smoothing the movement. In other words, the spring guide 16 is disposed along the arc-shaped outer peripheral surface of the stand rotating portion 6, and the outer peripheral surface of the stand rotating portion 6 and the spring right are located on the outer peripheral surface where the spring right 13 and the spring left 15 are in contact. 13. A guide for reducing friction with the spring left 15 is provided.

In the above-described configuration, the spring right 13 and the spring left 15 are fixed at the same position (both the spring hook fixing portions 10) in the stand base fixing portion 5, but may be fixed at different positions. In addition, in a state where the stand rotating unit 6 is at the reference position, the spring hanging rotating unit 12 and the spring hanging rotating unit 14 are in symmetrical positions with respect to a line connecting the rotation center of the stand rotating unit 6 and the spring hanging fixing unit 10. Although an example is shown, the present invention is not limited to this. If the spring specifications of the spring right 13 and the spring left 15 are the same, and the lengths of the spring right 13 and the spring left 15 are the same (the urging force is equal) when the stand rotating portion 6 is at the reference position, the spring hook The positions of the fixed portion 10, the spring-loaded rotating portion 12, and the spring-loaded rotating portion 14 are not limited to the above example.

  The sliding member 17 is formed of a resin having a small coefficient of friction, such as a resin such as POM (polyacetal), in an annular shape with an L-shaped cross section, and incorporated in the stand rotating unit 6, and the rotation of the stand rotating unit 6 and the stand base fixing unit 5 It has a function to reduce force.

The features of the operation of the left-right rotation mechanism of the present invention having the above-described configuration will be described.
1. It is assumed that a plurality of users using the image display unit 1 that rotates the image display unit 1 rotate the image display unit 2 leftward as shown in FIG. As an operation method, when the hand is extended to the back side of the right side when viewed from the front of the image display unit 2 and is pulled, the stand rotating unit 6 rotates smoothly due to the effect of the sliding member 11. At this time, since the stand rotating part 6 is fitted in the opening of the stand base fixing part 5, it is possible to suppress an unstable operation such as the image display part 2 falling or falling.

  Further, in this operation, the spring right 13 is pulled and extended by the spring hanging rotary portion 12, and the spring left 15 is returned and contracted by the spring hanging rotary portion 14. Although the return force of the spring right 13 is increased, since the mass of the stand column 4 and the image display unit 2 is added to the stand rotating unit 6, the spring right 13 cannot return the stand rotating unit 6. The unit 2 is held at a position where this operation is stopped.

2. Transporting the Image Display Device A user who has finished the operation after the above operation places both hands on the bottom surfaces of the left and right ends of the image display unit 2 so as to move the image display device 1 to another remote desk. By the lifting operation, the rubber member on the bottom surface of the chassis 7 which is a grounding portion of the stand base fixing portion 5 with the desk is lifted. At this time, due to the return force of the right spring 13, the chassis 7 provided with the support portion 8, the rotation stopper 9, and the sliding member 11 and the stand base fixing portion 5 are rotated clockwise (viewed from above) with respect to the stand rotation portion 6. )). And it stabilizes in the position of FIG. 2 (B). The chassis 7 and the stand base fixing part 5 can be rotated by the force of the spring right 13 because the mass of the image display part 2 and the stand column 4 is not applied unlike the installed state. Further, in order to align the front direction of the stand base fixing part 5 and the stand rotating part 6 (and the image display part 2), the spring specifications of the spring right 13 and the spring left 15 used in this embodiment (the wire diameter of the coil, The winding diameter, length and expansion / contraction / spring force correlation coefficient) are the same.

Summarizing the configuration and functions described above, the present invention has the following characteristics.
1. A stand rotating part 6 that supports the stand column 4 is rotatably arranged in an opening provided in the center part of the stand base fixing part 5, and is supported by an annular support part 8 provided in the chassis 7.
2. Annular sliding members 17 and 11 are provided above and below the periphery of the stand rotating unit 6.
3. A spring right 13 is provided between a spring hook fixing portion 10 provided on the stand base fixing portion 5 and a spring hook rotation portion 12 provided on the right side (viewed from the front) of the stand rotation portion 6. Further, a spring left 15 is provided between a spring hook fixing portion 10 provided on the stand base fixing portion 5 and a spring hook rotating portion 14 provided on the left side (as viewed from the front) of the stand rotating portion 6.
4). The spatial distance between the spring hook fixing portion 10 and the spring hook rotating portion 12 and the spatial distance between the spring hook fixing portion 10 and the spring hook rotating portion 14 were made equal.
5. The spring specifications of the tension coil type spring right 13 and spring left 15 were made equal. The spring right 13 always urges the stand rotating part 6 to rotate clockwise (counterclockwise when viewed from above), and the spring left 15 always applies the stand rotating part 6 to counterclockwise (clockwise viewed from above). Arranged to force.
6). Spring guides 16 for smooth movement of the spring right 13 and the spring left 15 that expand and contract according to the movement of the stand rotating part 6 are arranged in the peripheral part of the stand rotating part 6.

Due to the above characteristics, this configuration has the following effects. In an image display device having a left-right rotation mechanism of an image display unit,
1. Since the stand rotating part that supports the stand column is rotatably disposed in the opening provided in the center part of the stand base fixing part and supported by the supporting part provided in the chassis via the sliding member, it is necessary for the left and right rotation operation. The force is reduced and the orientation of the image display section can be easily adjusted.
2. Two spring-loaded rotating parts were provided on the stand rotating part at the same left and right spatial distance with respect to the spring-loaded fixed part provided on the stand base fixing part, and a tension coil spring of the same specification was hooked between them. Therefore, when the image display unit is lifted, the stand rotating unit is biased in a direction in which the front directions of the stand base fixing unit and the stand rotating unit coincide. Therefore, when the image display unit is lifted, a state in which the front directions of the stand base fixing unit and the stand rotating unit coincide is realized. This eliminates the need for the user to perform the work of aligning the front direction of the screen and the front direction of the stand, and improves convenience. When the image display apparatus is moved from one place to another place and installed, the adjustment of the orientation of the image display unit in the left and right direction can be made the same at the destination, so that the operability is good.
3. The spring force of the tension coil spring provided on each of the left and right sides is weaker than the force that returns the stand rotating part to the combined mass of the image display part and the stand column. It can be held, and the workability while viewing the display image is good.
4). Since the spring guide provided in the stand rotating part smoothes the movement of the left and right springs that expand and contract, the left and right rotating operation can be performed smoothly.

(Example 2)
FIG. 3 is a perspective view of the main stand mechanism portion of the image display apparatus representing the features of the present embodiment as viewed from above. FIG. 3A shows a state in which the image display unit indicated by broken lines can be rotated left and right. ) Represents a state in which the left-right rotation of the image display unit is restricted. The characteristic structure of the present embodiment will be described with reference to both drawings, but the description of the same components and specifications as those of the first embodiment will be omitted.

The stand rotation unit 6 and the image display unit 2 are always in relation to the stand base fixing unit 5 by the image display unit 2, the stand base fixing unit 5 that supports the image display unit 2, the left and right rotation mechanism of the stand rotating unit 6, and a pair of tension coil springs. The function of facing the front is the same as in the first embodiment.
The slide knob 21 is a resin part that is slidably fitted to a rectangular penetrating part formed on a part of the side surface of the stand base fixing part 5, so that it can be prevented from slipping. A plurality of grooves are processed.

The cam surface 21a is a smooth surface provided on the inner side of the slide knob 21, and includes a low surface, a high surface, and a slope that continuously connects both surfaces. Here, the height of the surface represents the height from the inner peripheral wall surface of the stand base fixing portion 5.
The lever 22 is a resin part that is rotatably supported, and is a mechanism that always contacts the cam surface 21 a and rotates by the movement of the slide knob 21.
The rotating shaft 23 is a metal shaft-shaped part that is slidably fitted into a through hole provided at the rotation center of the lever 22, and is fixed to the chassis 7 of the first embodiment.

The friction plate 24 is a hard rubber part bonded to a position facing the cam surface 21 a in the vicinity of the tip of the lever 22, and comes into contact with or separates from the stand rotating unit 6 according to the rotation operation of the lever 22. The friction plate 24 is a regulating unit that regulates the rotation of the stand rotating unit 6 in a state where it is in contact with the stand rotating unit 6. The lever 22 is an operation unit capable of switching between a state in which the friction plate 24 restricts rotation of the stand rotating unit 6 and a state in which the friction plate 24 does not restrict by user operation.

One end of the leaf spring 25 is fixed to the inner wall portion of the stand base fixing portion 5 by welding, and the other end is in contact with the side surface portion of the lever 22. A spring material made of stainless steel is formed into a V shape by pressing.
The features of the operation of the left-right rotation mechanism of the present invention having the above-described configuration will be further described.

1. Left / Right Rotation Operation of Image Display Unit Using the display image output from the PC while the user who uses the image display device 20 rotates the image display unit 2 leftward or rightward as in the first embodiment. Can work. As an operation method, if the hand is extended to the left side or the back side of the right side when viewed from the front of the image display unit 2 in FIG. 3A and pulled, the stand rotating unit 6 rotates smoothly. Thereafter, the orientation of the image display unit 2 is maintained at the angle at which the hand is released. Since the slide knob 21 is in the position slid leftward, the lever 22 is pressed against the lower surface of the cam surface 21a by the leaf spring 25, and the friction plate 24 is separated from the side surface of the stand rotating portion 6. The rotating part 6 is in a state where it can freely rotate.

2. Transport of Image Display Device It is assumed that the user who has finished the work after the above operation moves the image display device 20 to another desk that is separated. Unlike Example 1, it is considered that the image display device 20 is moved and installed in a state where the screen angle adjusted by the above operation is maintained.

In this case, the slide knob 21 is slid rightward. At this time, the cam surface 21a
The lever 22 that has been in contact with the lower surface moves to the higher surface along the slope. By this operation, the lever 22 rotates clockwise (viewed from the top), and the friction plate 24 is pressed against the side surface of the stand rotating unit 6 (see FIG. 3B).
The user lifts the image display device 20 with both hands on the left and right bottom surfaces of the image display unit 2, but the friction plate 24 suppresses the rotation of the stand rotating unit 6. Therefore, the structure configured by the chassis 7 and the stand base fixing portion 5 as in the first embodiment is prevented from rotating with respect to the stand rotating portion 6. That is, the image display unit 2 adjusted in the above operation can be transported while the orientation is maintained.

  In addition, if the image display part 2 is lifted with the slide knob 21 positioned in the left direction, the stand rotating part 6 can be freely rotated. Therefore, as in the first embodiment, the stand base fixing portion 5 is rotated by the force of the tension coil spring, and the front direction of the image display portion 2 coincides with the front direction of the stand rotating portion 6.

Summarizing the configuration and functions described above, the present invention has the following characteristics. However, the configuration and function added to the first embodiment will be described.
1. A slide knob 21 slidable to the left and right and having a cam surface 21a inside was fitted into a rectangular penetrating portion provided on the side surface of the stand base fixing portion 5.
2. By moving the slide knob 21 from the left side to the right side, the lever 22 is made adjacent so that the position where the tip end abuts moves from the lower surface to the higher surface of the cam surface 21a.
3. The lever 22 is rotatable around the rotation shaft 23, and a hard rubber friction plate 24 is provided on the side opposite to the cam surface 21a near the tip facing the cam surface 21a so as to face the side surface of the stand rotating portion 6. Glued. Further, the friction plate 24 is configured to be pressed against the side surface of the stand rotating portion 6 in a state where the tip end portion of the lever 22 is in contact with the high surface of the cam surface 21a.
4). One end of the V-shaped leaf spring 25 was welded to the inner wall of the stand base fixing portion 5, and the other end was brought into contact with the side surface of the lever 22, and the lever was always urged in a direction to come into contact with the cam surface 21a.

Due to the above characteristics, this configuration has the following effects. In an image display device having a left-right rotation mechanism of an image display unit,
1. A slide knob having a cam surface having a low surface, a slope, and a high surface is slidably attached to the side surface portion of the stand base fixing portion, and a lever whose tip is in contact with the cam surface is provided adjacently. At the tip of the lever, a friction plate is provided on the side opposite to the cam surface, and the friction plate is pressed against the side of the stand rotating unit with the tip contacting the high surface of the cam surface. A mechanism for regulating the operation was adopted. For this reason, the left and right rotations of the stand rotating unit and the image display unit with respect to the stand base fixing unit can be restricted according to the operator's request, and the degree of freedom in carrying and installing is increased.
2. Since the lever tip is always urged in the direction to contact the cam surface using a V-shaped leaf spring, the friction plate 24 is separated from the stand rotating portion when the slide knob 21 is located on the left side. The stand rotating unit and the image display unit can be freely rotated. In this state, when the image display device is lifted and the installation position is moved in the same manner as in the first embodiment, the image display unit can be installed with the left and right directions being equal to each other with respect to the stand base fixing unit.

(Example 3)
FIG. 4 is a perspective view of the main stand mechanism portion of the image display apparatus that clearly shows the features of the present embodiment, as viewed from above. FIG. 4A is a front view of the image display unit indicated by a broken line. (B) represents a state in which the image display unit is adjusted to the left-rotated position. The characteristic structure of the present embodiment will be described with reference to both drawings, but the description of the same components and specifications as those of the first embodiment will be omitted.

The image display device 30 is a device that displays an image based on an image signal from an image output device such as a PC using a thin image display panel, and includes an image display unit 2 and a stand 31 as in the first embodiment. Has been.
The stand base fixing part 32 incorporates a left and right rotation mechanism to be described later, and the surface is a resin part having an appearance, and has a rectangular design when viewed from above.

  The stand rotating part 33 is a part having a metal disk shape located in an opening provided in the central part of the stand base fixing part 32. The stand column 4 is firmly fixed to the upper surface with a screw (not shown), the upper peripheral side is rotatably fitted with the stand base fixing part 32, and gear teeth are formed on the lower peripheral side. 1 is supported by a support portion (not shown) of the chassis via a sliding member.

The fan gear right 34 is a first gear that is located on the right side (as viewed from the front of the stand) of the stand rotating part 33 and meshes with a gear formed on the stand rotating part 33 and is rotatable in the front-rear direction. is there.
The rotating shaft 35 is rotatably fitted to the rotation center of the fan gear right 34 and is fixed to the chassis 45 by caulking.
The movable side spring hook 36 is a protrusion having a circular cross section provided on the upper surface of the fan gear right 34, and a groove (not shown) is provided on a part of the side surface.

The fixed-side spring hook 37 is a protrusion having a circular cross section that is fixed to the chassis 45 by caulking, and has a groove (not shown) in a part of the side surface.
The coil spring 38 is rotatably fitted to the rotary shaft 35, and has one end in contact with the groove of the movable side spring hook 36 and the other end in contact with the groove of the fixed side spring hook 37.
The fan gear left 39 is a second gear that is positioned on the left side (as viewed from the front of the stand) of the stand rotating portion 33 and has a tooth surface meshed with the gear formed on the stand rotating portion 33 and arranged to be rotatable forward and backward. is there.

The rotating shaft 40 is rotatably fitted to the rotation center of the fan gear left 39 and is fixed to the chassis 45 by caulking.
The movable side spring hook 41 is a protrusion having a circular cross section provided on the upper surface of the fan gear left 39, and a groove (not shown) is provided on a part of the side surface.
The fixed-side spring hook 42 is a protrusion having a circular cross section that is fixed to the chassis 45 by caulking, and has a groove (not shown) in a part of the side surface.
The coil spring 43 is rotatably fitted to the rotary shaft 40, and has one end in contact with the groove of the movable side spring hook 41 and the other end in contact with the groove of the fixed side spring hook 42.

The features of the operation of the left-right rotation mechanism of the support device of this embodiment having the above-described configuration will be described.
1. It is assumed that a plurality of users who use the left and right rotation operation image display device 30 of the image display unit are rotating the image display unit 2 leftward as shown in FIG. As an operation method, if the hand is extended to the back side of the right side when viewed from the front of the image display unit 2 and is pulled, the stand rotating unit 33 rotates smoothly. At this time, since the stand rotating part 33 is fitted in the opening of the stand base fixing part 32, an unstable operation such as the image display part 2 falling down or coming off can be suppressed.

  Also, since the rotating portion 33 rotates clockwise (as viewed from the top) in this operation, the fan gear right 34 is directed forward (as viewed from the front) (counterclockwise as viewed from the top). The fan gear left 39 rotates in the back direction (viewed from the front) (counterclockwise viewed from the top). As a result, the coil spring 38 hung on the movable side spring hook 36 and the fixed side spring hook 37 has a wider angle between the ends and the biasing force is weakened. In the coil spring 43 thus formed, the angle between the tips is narrowed and the biasing force is increased.

Here, if the rotational force of the fan gear 34 is defined as F ₁ and the rotational force of the fan gear 39 is defined as F ₂ ,
In the state of FIG. 4A, F ₁ = F ₂
In the state of FIG. 4B, F ₁ <F ₂
It can be expressed.
That is, (the force that the fan gear 39 rotates in the forward direction)> (the force that the fan gear 34 rotates in the forward direction), and the force that rotates in the counterclockwise direction acts on the stand rotating portion 33.

  However, since the mass of the stand column 4 and the image display unit 2 is added to the stand rotation unit 33, the stand rotation unit 33 does not rotate counterclockwise in the installed state, and the image display unit 2 is stopped. Held in.

2. Packaging of Image Display Device It is assumed that a user who has finished the work after the above operation stores the image display device 30 in a deep cardboard box for transportation. At this time, the user puts both hands on the left and right bottom surfaces of the image display unit 2 and lifts them up. By this operation, a rubber member (not shown) on the bottom surface of the chassis 45, which is a grounding part of the stand base fixing part 32 with the desk, is floated. At this time, due to the rotational force of the coil spring 38 and the coil spring 43 (rotational force F ₁ <rotational force F ₂ ), the structure constituted by the chassis 45 and the stand base fixing portion 32 rotates clockwise with respect to the stand rotary portion 33. Rotate (viewed from above). And it stabilizes in the position of FIG.

  As a result, the front direction of the image display unit 2 and the front direction of the stand 31 coincide with each other, so that the image display unit 2 can be smoothly accommodated inside the cardboard box without contacting the top surface entrance of the cardboard box.

The chassis 45 and the stand base fixing part 32 can be rotated by the rotational force F ₂ generated by the coil spring 43 because the mass of the image display part 2 and the stand column 4 is not applied unlike the installation state. Further, in order to match the front direction of the stand base fixing part 32 and the stand rotating part 33 (and the image display part 2), the spring specifications of the coil spring 38 and the coil spring 43 used in this embodiment (the wire diameter of the coil, The winding diameter, length, and rotation / spring force correlation coefficient) are the same.

Summarizing the configuration and functions described above, this embodiment has the following characteristics. However, an additional configuration and function with respect to the first embodiment will be described.
1. A stand rotating portion 33 that supports the stand column 4 is disposed in an opening provided in the central portion of the stand base fixing portion 32 and is rotatably supported by the chassis 45 via an annular sliding member.
2. A gear is formed on the side of the stand rotating unit 33, and each of the fan gear 34 arranged adjacent to the right side (viewed from the front) of the stand rotating unit 33 and the fan gear 39 arranged adjacent to the left side (viewed from the front). Were meshed with the side gears of the stand rotating portion 33.
3. A coil spring 38 is incorporated between a movable side spring hook 36 provided on the fan gear 34 and a fixed side spring hook 37 provided on the chassis 45 so that the fan gear 34 rotates forward (as viewed from the front). Energized. A coil spring 43 is incorporated between a movable side spring hook 41 provided on one fan gear 39 and a fixed side spring hook 42 provided on the chassis 45 so that the fan gear 39 rotates forward (as viewed from the front). Energized to do.
4). The relative position of the movable side spring hook 36 and the fixed side spring hook 37 and the relative position of the movable side spring hook 41 and the fixed side spring hook 42 were matched. Furthermore, the spring specifications of the coil spring 38 and the coil spring 43 are the same. The biasing force F ₁ of the coil spring 38 was set to be the biasing force F ₂ of the coil spring 43 in a state where the front directions of the stand rotating unit 33 (and the image display unit 2) and the stand base fixing unit 32 coincided.

Due to the above characteristics, this configuration has the following effects. In an image display device having a left-right rotation mechanism of an image display unit,
1. The tooth surfaces of a pair of fan gears arranged adjacent to the left and right sides of the stand rotating portion are meshed with the gear formed on the side surface of the stand rotating portion. Coil springs are incorporated between the movable side spring hooks provided on each of the fan gears and the fixed side spring hooks provided on the chassis corresponding to each of the fan gears so that both fan gears are in the forward direction (viewed from the front). Energized to rotate. Further, the specifications of both coil springs and the relative positions of the spring hooks on the movable side and the fixed side are the same for each fan gear, and each fan gear is in a state where the front directions of the image display unit and the stand base fixing unit match. The urging force of the coil spring corresponding to is set to be the same. Therefore, in a state where the image display unit is lifted, the front direction of the image display unit and the front direction of the stand are biased so as to coincide with each other. Therefore, the position of the stand at the time of carrying and packing is stabilized, and the work of carrying and packing can be performed smoothly.
2. The spring force of the coil springs provided on each of the left and right sides is weaker than the force required to return the stand rotating part to the combined mass of the image display part and the stand column. The stand rotating part is suppressed from rotating by the spring force. Therefore, when the user adjusts the orientation of the image display unit in a desired orientation, the orientation of the image display unit is held at the adjusted position.
3. The force that rotates the stand so that the front direction of the stand and the front direction of the image display unit coincide when the image display device is lifted is transmitted to the stand rotating unit via the fan gear. Is the power to be. For this reason, unlike the first embodiment in which the rotation operation occurs suddenly, it is relatively slow, which increases the sense of security for the operator and improves the quality of the image display apparatus.

3, 31 Stand; 4, 54 Stand column; 5, 32 Stand base fixing part; 6, 33, 53 Stand rotating part; 13, 15 Spring

Claims (10)

A support device for supporting a screen of an image display device,
A base for mounting on the installation surface;
A rotating part that is rotatably assembled around an axis perpendicular to the installation surface with respect to the base part, and that rotates in a predetermined angular range clockwise and counterclockwise around a predetermined reference position;
A support column fixed to the rotating unit and supporting the screen;
A first urging unit that generates an urging force to rotate the rotating unit in a predetermined direction;
And a second urging unit that generates an urging force that rotates the rotating unit in a direction opposite to the predetermined direction.   2. The support according to claim 1, wherein the urging force generated by the first urging unit and the urging force generated by the second urging unit are equal in a state where the rotating unit is in the reference position. apparatus. The first urging portion is a first spring having one end fixed to the base portion and the other end fixed to the rotating portion,
The support device according to claim 1, wherein the second urging portion is a second spring having one end fixed to the base portion and the other end fixed to the rotating portion. The first spring and the second spring are springs of the same specification,
In the state where the rotating part is at the reference position,
A distance between a position at which the first spring in the base portion is fixed and a position at which the first spring is fixed in the rotating portion;
A distance between a position where the second spring is fixed in the base portion and a position where the second spring is fixed in the rotating portion;
The support device according to claim 3, which are equal. The position where the first spring in the base portion is fixed and the position where the second spring in the base portion is fixed are the same position.
The position where the first spring is fixed in the rotating part and the position where the second spring is fixed in the rotating part are the rotation center of the rotating part when the rotating part is at the reference position. The support device according to claim 4, wherein the support device is in a symmetrical position with respect to a line connecting the first spring and the position of the base portion to which the second spring is fixed.   The first spring and the second spring are disposed along an arcuate outer peripheral surface of the rotating portion, and a portion of the outer peripheral surface where the first spring and the second spring are in contact with each other, The support device according to any one of claims 3 to 5, wherein a guide for reducing friction between the outer peripheral surface and the first spring and the second spring is provided. Gear teeth are formed on the rotating part,
A first gear and a second gear disposed so as to mesh with the gear teeth of the rotating part;
The first urging unit generates an urging force that rotates the first gear so that the rotating unit rotates in the predetermined direction by the rotation of the first gear.
The second biasing unit generates a biasing force that rotates the second gear so that the rotation unit rotates in a direction opposite to the predetermined direction by the rotation of the second gear. The support device as described. In the state where the rotating part is in the reference position, the force acting on the rotating part via the first gear and the force acting on the rotating part via the second gear are equal in magnitude. Claim 7
The support apparatus as described in. A restricting portion for restricting rotation of the rotating portion;
An operation unit capable of switching between a state in which the regulating unit regulates rotation of the rotating unit and a state in which the regulating unit does not regulate by a user operation;
A support device according to any one of claims 1 to 8.   The image display apparatus by which a screen is supported by the support apparatus of any one of Claims 1-9.

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