CN101031045B - flat panel display - Google Patents

Abstract

A position adjustment structure, a rotating shaft bearing structure and a rotation-speed reducing structure suitable for a flat panel display. The rotation-speed reduction structure includes a position adjustment mechanism, the structure includes one or more parts that can be used to fix the attachment bracket and the main body unit of the device to each other, and the position adjustment parts can be used to adjust the mounting positions of the bracket and the main body unit. The rotary shaft bearing structure includes a radial bearing and a thrust bearing for supporting the rotary shaft between the display unit and the bracket. The rotational speed reducing structure reduces the rotational speed between the display screen unit and the stand once the applied rotational load exceeds a certain level.

Description

flat panel display

This application is a divisional application of an invention patent application with an application date of September 12, 2003, an application number of 03824585.X, and an invention title of "flat panel display".

technical field

The present invention relates to a rotation adjustment mechanism suitable for a vertical flat panel display, in particular to a position adjustment structure suitable for a display unit of a rotary vertical flat panel display, wherein the vertical flat panel display is equipped with a single-axis rotation structure and The horizontal position of the display unit can be maintained at the same time.

The present invention also relates to a vertical rotating structure suitable for a flat panel display, and more particularly to a bearing structure suitable for a rotating shaft that allows the flat panel display to rotate on the installation position, the structure makes the central part of the main body weight of the flat panel display not on the central axis corresponding to the bracket.

The present invention also relates to a stand rotation structure suitable for use with flat panel displays, and more particularly to a reduction in rotation speed reduction (or torque limiter) structure in the rotation structure, which structure is suitable for reducing the rotation speed of a rotation motor or other input and The output is then provided to a transmission or other device, and is also suitable for protecting the device from excessive rotational loads.

Background technique

In recent years, a stand-up flat panel display configured with a display screen such as an LCD (Liquid Crystal Display), a Plasma Display, or an EL (Electro Luminescence) display has become more and more popular. In particular, there is an increased demand for large-sized vertical flat panel displays configured with a display size of 30 inches or more. A variety of such products have been developed for domestic or commercial purposes.

In these stand-type flat panel displays, a display screen unit includes an LCD, a plasma, or an EL display, and a main body unit includes an amplifier unit, a power supply unit, a driver circuit, and other devices. The display screen unit and the main body unit are generally supported by a bracket, and the bracket includes horizontally extending legs so that the display screen unit can be vertically supported relative to the ground. The bracket also includes a rotating structure through which the main body unit can be axially supported in any rotatable manner.

FIG. 1 shows an enlarged schematic view of an example of the above-mentioned vertical display. The flat panel display 100 is a floor-standing flat panel display, which includes a display unit 110 , a main unit 120 , and a stand 130 . The term "floor type" means that the main unit 120 is composed of a control unit 121 including a power supply, a driver circuit and a control circuit, and an amplification unit 122, and the main unit 120 and the display unit 110 are integrated together. flat panel display.

The display screen unit 110 includes a display screen 111 such as an LCD, plasma or EL display. The main body unit 120 includes a control unit 121 and an amplification unit 122 . The main body unit 120 is integrated with the display unit 110 and is axially supported by a bracket 130 . The stand 130 includes a stand support column 131 and a stand base 132 . The bracket supporting column 131 has a rotating structure through which the main body unit 120 can be supported in any rotatable manner.

(1) As an example of a rotating structure applicable to the above-mentioned vertical flat panel display, Japanese Patent Publication No. 08-331485 (1996) discloses a rotating structure applicable to a television set. In this rotating structure, sliding rollers 7 are arranged on each edge end of the bottom of the main unit of the TV set for supporting its weight and allowing it to roll. The sliding roller 7 can be used to roll on the upper surface of the TV stand 13, thereby allowing the TV main unit to rotate.

However, it is difficult to apply the rotating structure of the TV set to the rotating structure of the vertical flat panel display. This is because in the above structure, the TV main unit and the roller for sliding need a certain width and depth in the TV main unit and the TV stand. Furthermore, it creates a certain gap between the TV main unit and the TV stand, and thus exposes the interior of the TV stand as the TV main unit rotates.

(2) Referring to FIG. 1 , the display screen unit 110 includes a display screen 111 such as an LCD, plasma, or EL display. The main body unit 120 includes a control unit 121 and an amplification unit 122 . The main body unit 120 is integrated with the display unit 110 and axially supported by the bracket 130 . The stand 130 includes a stand support column 131 and a stand base 132 . The bracket support column 131 has a rotating structure through which the main body unit 120 can be supported in any rotatable manner.

As a conventional example of such a rotating structure, Japanese Patent Publication No. 10-32771 shows a rotating structure in which a support column 7 supports a display 3 and a rotating platform is supported on a base 1 2. A thrust bearing 8 is provided between the base 1 and the rotating platform 2 so as to allow the display 3 to rotate.

If the rotating structure is applied to a vertical flat panel display, it is necessary to adopt a structure such that the display unit and the main body unit can be axially supported by the support columns of the stand in any manner.

(3) In the vertical flat panel display shown in FIG. 1 , for example, the rotating structure in the bracket 130 is generally configured with driver electrodes to allow the display unit 110 and the main unit 120 to rotate automatically.

In this type of self-rotating structure, there is provided a member that can reduce the rotational output of the drive motor by a certain reduction ratio. In particular, by placing a load of a certain size on the rotating shaft that is rotating so that the rotation stops when the drive motor stops, by appropriately selecting the reduction ratio, the speed of automatic rotation can be controlled. For example, a capstan structure is provided in a worm unit to which a drive motor is connected.

A rotation speed reducing structure similar to that in conventional displays is disclosed in Japanese Utility Model Publication No. 63-61884A (1988) and Japanese Utility Model Publication No. 64-31246U (1989).

The former, Japanese Utility Model Patent Publication No. 63-61884A discloses a rotatable cabinet, in which the main unit of the cabinet can be arranged on the base in any rotatable manner. Due to the weight of the main body unit of the cabinet, the bevel gear and the output gear mesh with each other, and the reduction gear chain can be arranged and driven vertically.

The latter, Japanese Utility Model Patent Publication No. 64-31246 discloses a steering structure, which includes a gear that can accept the rotation of the gear structure, the bevel gear is used to elastically engage the gear on one side of the axis, and is installed The clutch on the upper platform also engages the bevel gear in this way. In this steering configuration, the gear structure and poles are protected from damage in the event of excessive load torque.

Contents of the invention

About the position adjustment structure of the flat panel display

As the size of stand-up flat panel monitors has become larger, so has the size of the TV screen, and therefore the stand must be able to support sufficient weight. Generally speaking, large-sized display screens are supported by two brackets on the left and right edges of the display screen. Additionally, a trapezoidal stand can be used to increase the contact area between the stand and the display. However, it is desirable to allow large size displays to be supported by a single stand.

At this time, the single-axis stand must be able to rotate the screen in a horizontal manner. In the case of large vertical flat panel displays, in particular, even slight inclination in the horizontal direction can produce a large difference in height between the left and right edges of the wide display unit if the display has a horizontal With a larger inclination, this is very noticeable to the user. For example, it is well known that in the case of some large size LCD televisions, if there is a tilt of 20' (about 1/3 degree) in the horizontal direction, the user will feel this tilt.

A vertical flat panel display can generally be designed such that its main unit can be manually or automatically rotated relative to the stand. The horizontal position of the main unit must be stable so that it does not shake from side to side during rotation.

The horizontal position can be easily adjusted by using two brackets or supporting shafts to support the display unit. However, if the display unit is supported by a single support shaft on the bracket, in fact, regardless of the precise design of the horizontal positioning of the main unit, the size of each component will vary slightly, or a small error in the assembly process will cause Introduced into the positioning of each component. Therefore, it is very difficult to manufacture a vertical flat panel display in which the horizontal position of the main body unit can be precisely maintained according to the design.

Therefore, an object of the present invention is to provide a position adjustment structure suitable for a vertical flat panel display, wherein the vertical flat panel display is configured with a single-axis rotation structure and the display unit can be rotated horizontally.

About the bearing structure of the rotating shaft in the flat panel display

Stand-up flat panel displays are generally very bulky due to the use of materials such as glass throughout the liquid crystal panel unit on the display unit. In addition, when the LCD panel portion and the housing are formed in an integrated manner, the larger the size of the display, the heavier the weight of the main body unit. Also, in the case of a stand suitable for a flat panel display, there is a problem that the flat panel display cannot appear thinner unless the stand unit is made thinner than the main body unit when viewed from the side.

For the above reasons, if the main body display unit is closer to the front of the screen than the center of the axis of the stand unit, the center of gravity of the display screen unit and the main body unit will be inclined much to the front. As a result, the centers of gravity of the display unit and the main body unit are largely deviated from the center of rotation of the stand.

Obviously, when the display unit of the flat panel display can be positioned at the front half of the periphery of the rotating structure, the center of gravity of the display unit will also be positioned forward at the peripheral portion of the rotating structure, which creates a gap between the center of rotation and the center of gravity of the stand. large deviation.

If the display unit and the main body unit rotate under such conditions, loads are applied to the bearings of the rotating structure in an irregular manner, thereby affecting the smooth rotation of the display unit and the main body unit. Whereas in the rotating structure described in Japanese Patent JP 08-331485, sufficient stability is provided by the thrust bearing in the direction of the center of gravity, but the deviation of the center of gravity of the display screen unit and the main body unit during rotation is not considered. If such a rotating structure is used in a stand-type flat panel display, the shaft and bearings of the rotating structure shake vertically, thus preventing smooth rotation of the display unit and the main body unit.

Accordingly, an object of the present invention is to provide a rotating structure suitable for a stand type flat panel display, wherein the center of gravity of the display unit and the main body unit can be deviated from the center of rotation of the stand rotating structure, thereby ensuring smooth and stable rotation.

Regarding rotation-velocity reduction structures in flat panel displays

The present invention provides a kind of device, and this device comprises a main body unit and a support unit that has a uniaxial rotation unit for supporting the main body unit; Adjust the horizontal position of the main unit by tilting the components.

The present invention further provides a flat panel display, which includes a main body unit having a display screen and a stand unit supporting the main body unit with a single rotation axis, and the device further includes a device for adjusting the main body unit when the stand unit and the main body unit are connected. Parts that are tilted in horizontal position.

Preferably, the flat panel display includes a part for temporarily fixing the stand unit and the main body unit when the stand unit and the main body unit are connected, and a part for fixing the stand unit and the display unit for a long time, wherein, before the stand unit and the main body unit are fixed for a long time, the stand unit The main body unit and the main body unit may be temporarily fixed to each other, and then the inclination of the main body unit is adjusted by the inclination adjusting part.

According to the present invention, the inclination adjusting part comprises an eccentric part arranged at the connecting position of the bracket unit and the main body unit.

The present invention further provides a flat panel display, which includes a main body unit with a display screen and a stand unit supporting the main body unit with a single rotation axis, the device further includes a connecting part for connecting the stand unit and the main body unit, wherein the The connection part includes a part for fixing the bracket unit and the main body unit, and an inclination adjustment part for adjusting the horizontal position inclination of the main body unit.

According to the present invention, the connection part further includes a positioning pin for positioning the bracket unit and the main body unit.

The present invention further provides a flat panel display, which includes a main body unit with a display screen and a stand unit supporting the main body unit with a single rotation axis, the device further includes a connecting part for connecting the stand unit and the main body unit, the connection Components include: an opening allowing the desired fixing of the stand unit and the main unit to be screwed to each other; and a tilt adjustment opening for adjusting the tilt of the main unit in horizontal position, wherein the tilt of the main unit can be adjusted by inserting an eccentric cam into the in the tilt adjustment opening and rotate the eccentric cam to adjust.

Rotary shaft bearing structure for flat panel displays

The present invention provides a main body unit, a support unit and a rotating structure for the main body unit to rotate horizontally relative to the support unit, wherein the rotating structure includes various bearings for supporting the rotating shaft.

According to the invention, the variety of bearings includes a combination of radial and thrust bearings.

According to the invention, the center of gravity of the body unit is located outside the reference rotational circumference defined by the thrust bearing.

The present invention further provides a flat panel display comprising a swivel structure made of an upper unit and a lower unit, wherein the lower unit has a single axis of rotation to which the upper unit is fixed and the upper unit has multiple supports for rotation Radial bearings of the shaft, upper and lower units are able to rotate relative to each other.

According to the present invention, a stopper is provided near the top end of the rotating shaft, and the stopper can fix a position where a certain axial force can be applied at the same time.

Rotational speed reduction structure related to flat panel display

The present invention provides a flat panel display, which includes a main body unit with a display screen, a stand unit, and a rotating structure for the main body unit to rotate horizontally relative to the stand unit, wherein the rotating structure can be used once an applied Decreases the speed of rotation when the rotation load exceeds a certain level.

According to the invention, the rotary arrangement comprises two or more gears and a clutch arrangement for reducing the rotational speed between the respective gears once the applied rotational load exceeds a certain level.

According to the invention, the rotating structure comprises two or more gears which are torque limiting gears adapted to reduce the speed of rotation once the applied rotational load exceeds a certain level.

According to the invention, the torque limiting gear comprises an upper gear and a lower gear, wherein the upper gear and the lower gear are adapted to frictionally slide once the applied rotational load exceeds a certain level.

According to the present invention, the torque limiting gear includes a gear base, an upper gear fixed to the gear base, and a lower gear disposed between the gear base and the upper gear. Wherein, the gear base has a friction member arranged on its surface facing the lower gear, and an elastic member arranged between the upper and lower gears, the elastic member is suitable for pressing the lower gear against the friction member so that the lower gear The gear and the gear base can slide against each other.

According to the invention, the rotating structure includes a drive motor and is capable of rotating automatically.

Preferably, the flat panel display further includes means for accepting remote control operation, wherein the rotation of the rotating structure can be controlled by the remote control operation.

According to the invention, the rotating structure includes a position sensor and is able to recognize its own rotational position.

According to the present invention, the rotating structure is adapted to reduce the rotational speed between the motor and the gear or between the gears, the rotating structure further comprises a torque limiting gear, wherein when the upper gear and the lower gear of the torque limiting gear slide against each other reduce the speed of rotation.

According to the present invention, the torque limiting gear includes a gear base, which can fix the upper gear on the base, and the lower gear is arranged between the gear base and the upper gear, wherein the gear base has a The friction part on the surface of the lower gear, and an elastic part arranged between the upper and lower gears, the elastic part is suitable for pressing the lower gear onto the self-friction part, so that the lower gear and the gear base can frictionally slide against each other.

According to the present invention, wherein the display screen comprises a liquid crystal display, a plasma display, or an EL display.

Brief description of the drawings

Fig. 1 is a front view of an example of a vertical flat panel display.

FIG. 2 shows a frame structure supporting the display unit and the main unit of the vertical flat panel display shown in FIG. 1 .

3 is an enlarged rear view of a rotation unit and an installation angle suitable for a position adjustment structure of a stand-type flat panel display according to a first embodiment of the present invention.

FIG. 4 is an enlarged side view of a rotation unit and an installation angle suitable for a position adjustment structure of the stand-type flat panel display according to the first embodiment.

FIG. 5 is an enlarged plan view of a rotation unit and an installation angle suitable for the position adjustment structure of the stand-type flat panel display according to the first embodiment.

6 is a plan view of a rotation unit, an installation angle and an aluminum frame when the position adjusting structure suitable for the stand-type flat panel display according to the first embodiment is assembled.

Figure 7 is a rear view of the swivel unit and mounting angle adapted to the position adjustment structure, similar to Figure 3, but in this figure the eccentric cam is inserted in the position adjustment opening.

FIG. 8 shows a rotating shaft bearing structure in a stand-type flat panel display according to a second embodiment of the present invention.

FIG. 9 shows a front sectional view of a rotation unit used in the rotation shaft bearing structure in the stand-type flat panel display according to the second embodiment.

FIG. 10 shows a side sectional view of a rotation unit used in the rotation shaft bearing structure in the stand-type flat panel display according to the second embodiment.

11 is a bottom view of the upper unit of the rotation unit used in the rotation shaft bearing structure in the stand-type flat panel display according to the second embodiment.

12 is a plan view of an upper unit of a rotation unit used in a rotation shaft bearing structure in a stand type flat panel display according to a second embodiment.

13 is a plan view showing an internal structure of a rotation speed reducing structure of a stand-type flat panel display according to a third embodiment of the present invention.

FIG. 14 shows a rotation speed reducing structure of a vertical flat panel display according to a third embodiment of the present invention, showing a side sectional view of its internal structure.

15 is an enlarged sectional view of a torque limiting gear included in a rotation speed reducing structure of a stand type flat panel display according to a third embodiment of the present invention.

Detailed ways

The best mode for carrying out the invention will be discussed below with reference to the accompanying drawings.

Figures 1 to 15 show various embodiments of the present invention, wherein similar elements having substantially similar structures and functions are designated with the same reference numerals.

Fig. 1 is a front view of an example of a vertical flat panel display. FIG. 1( a ) shows an example of using the bracket unit 130 to support the display unit 110 and the main unit 120 . Another example shown in Figure 1(b) is similar to the example shown in Figure 1(a), except that the legs of the stand unit 130 are longer. In another example shown in FIG. 1( c ), the main body unit 120 is installed behind the display screen unit 110 in an integrated manner.

FIG. 2 shows a frame structure supporting a display unit and a main body unit of the vertical flat panel display shown in FIG. 1, and a rotating structure allowing the display unit and the main unit thereof to rotate. As shown in FIG. 2 , in the vertical flat panel display, the aluminum frame 230 can be supported by the rotating unit 210 of the stand through the installation angle 220 in an arbitrary rotation manner.

Figures 2(a) and (b) show examples corresponding to Figures 1(a) and (b).

First Embodiment: Flat Panel Display with Position Adjustment Structure

The position adjustment structure of the flat panel display according to the present embodiment can be used in the stand support portion of the stand flat panel display shown in FIGS. 1 and 2 . Through the position adjustment structure, the rotation unit 210 and the installation angle 220 fixed thereon can position and fix the aluminum frame 230 .

3, 4 and 5 are respectively the rear, side and top views of the rotation unit 210 and the installation angle 220 of the stand shown in FIG. 2 . Figure 3(a) and (b) show examples corresponding to Figure 1(a) and (b), respectively.

Referring to FIGS. 3 to 5 , the installation angle 220 includes fixing openings 321 to 326 of the positioning pin 310 and position adjustment openings 331 to 332 . Locating pins 310 can be used to engage with protrusions 231 (see FIG. 2 ) protruding from the front panel (made of plastic) through the aluminum frame 230 so that the mounting angle 220 can be roughly positioned when attached to the aluminum frame 230 . The fixed openings 321 to 326 and the position adjustment openings 331 and 332 are capable of receiving screws for fine adjustment of the mounting angle 220 and the mounting position of the aluminum frame 230, as discussed below.

The installation of the rotation unit 210, the installation angle 220 and the aluminum frame 230 will be discussed below. FIG. 6 shows a top view of the assembled swivel unit 210 , mounting angle 220 and aluminum frame 230 .

Referring to Fig. 6 (a) and Fig. 7, initially, each positioning pin 310 on the installation angle 220 is inserted in the opening provided in the protrusion 231 protruding from the front panel (made of plastic) by the aluminum frame 230, To determine the location of the installation. Thus, the aluminum frame 230 can be fixed with screws. The aluminum frame 230 is only fixed with screws, so that the mounting angle 220 can only be rotated slightly relative to the aluminum frame 230 around the center of the screw in the fixing opening 321 . A method of temporarily fixing the other fixing openings 322 to 326 is then employed. Temporary fixation is performed with the torque that the main unit of the flat panel display will not be tilted by its own weight.

In the present invention, the installation positions of the rotating unit 210 and the aluminum frame 230 can be preferably improved as shown in FIG. 6( b ). This improvement can be achieved by changing the angle 220 or the design of the positioning pin 310 in an appropriate manner. In addition, an L-shaped mounting part can be used, as shown in Fig. 6(c).

Subsequently, the installation positions of the rotation unit 210, the installation angle 220, and the aluminum frame 230 can be adjusted arbitrarily. Figure 7 shows a rear view of the swivel unit and mounting angle, similar to Figure 3. However, in FIG. 7 , an eccentric cam 341 may be inserted into the position adjustment opening 331 . Figure 7(a) and (b) show examples corresponding to Figure 1(a) and (b).

In the present invention, the eccentric cam 341 has an oval screw head. Thus, when the eccentric cam 341 rotates, the diameter of the screw head varies in the vertical direction. In FIG. 7 , when the eccentric cam 341 rotates to the right, the screw head will have a larger diameter in the vertical direction, so that the upper inner wall of the position adjustment opening 331 will be pushed upward by the eccentric cam 341 .

If the installation angle 220 should be adjusted in the opposite direction, the eccentric cam 341 may be inserted into the position adjustment opening 332 . By rotating the eccentric cam to the left, the lower inner wall of the position adjustment opening 332 is pushed downward.

The mounting angle then allows slight rotation around the screw shaft in the fixing opening 321 . Therefore, by finely adjusting the mounting positions of the rotating unit 210, the mounting angle 220, and the aluminum frame 230 while the eccentric cam 341 is rotated, the positions of the display unit and the main body unit of the flat panel display can be finely adjusted to a level.

After fine adjustment, the temporarily fixed fixing openings 322-326 can be fully tightened, thus, the swivel unit 210, the mounting angle 220 and the aluminum frame 230 can be completely fixed in place.

The shape of the eccentric cam 341 can be formed in various ways as long as it is asymmetrical with respect to the center of rotation. For example, the shape may be an ellipse or an eccentric circle, and an eccentric cam having such a shape may also have the function of the above-mentioned position adjustment structure.

The installation positions of the fixing openings 321 to 326 and the position adjustment openings 331 and 332 on the installation angle 220 shown in FIGS. 3 and 7 are merely illustrative examples, and various other examples are possible.

For example, while the above discussion of manually rotating the eccentric cam 341 to finely adjust the safety positions of the display unit and the main body unit, the fine adjustment can also be performed automatically. In this case, a suitable electrical position adjustment component is provided.

The position adjustment structure in the stand supporting part of the vertical flat panel display discussed above can be applied to all kinds of devices supported by the stand.

Second Embodiment: Flat Panel Display with Bearing Structure for Rotating Shaft

The bearing structure of the rotating shaft of the flat panel display according to the present invention can be applied to the bracket support part of the vertical flat panel display shown in FIGS. 1 and 2 . A bearing structure of the rotation shaft may be provided inside the rotation unit 210 .

FIG. 8 shows a rotation unit 210 including the rotation structure according to the present embodiment. The rotation unit 210 includes an upper unit 810 and a lower unit 820 . The upper and lower units may be adapted to relatively rotate with a predetermined rotational torque. The upper unit 810 can be fixed on the aluminum frame 230 through the mounting angle 220 , while the lower unit 820 can be fixed on the stand base 132 .

FIG. 9 shows a front sectional view of the rotation unit 210 . Figure 10 shows a side sectional view of the same unit. FIG. 11 shows a bottom view of the upper unit 810 of the rotating structure of this embodiment. FIG. 12 shows a top view of the lower unit 820 of the rotating structure of this embodiment.

In the rotating structure shown in FIGS. 9 and 10, the lower unit 820 has a rotating shaft 910 fixed thereon. The upper unit 810 includes an upper ball bearing 920 and a lower ball bearing 930, which together form a radial bearing for the rotating shaft. The lower end of the rotating shaft 910 may be fixed on the lower unit 820 with a screw 940 . The upper end of the rotation shaft 910 may be anchored to a bearing portion of the upper unit 810 through a washer 950 .

The rotating structure of the present embodiment further includes a plurality of balls 960 disposed between the upper and lower units at predetermined intervals along a circumference coaxial with the rotating shaft 910 . Each ball 960 may be used to roll in contact with the upper surface of the lower unit 820, thus functioning as a thrust bearing.

Thus, the rotating structure of this embodiment includes two kinds of bearings, namely, a radial bearing including upper ball bearings 920 and lower ball bearings 930 , and a thrust bearing including balls 960 . A rotary structure having such a structure mainly receives thrust loads using thrust bearings and mainly receives radial loads using radial bearings, thereby allowing smooth and stable rotation even if the center of gravity is not on the rotation axis, as in the case of flat panel displays.

Such a structure may include a thrust bearing and a radial bearing, and the center of gravity of the flat panel display is at the reference rotational circle of the radial bearing (referred to as the circle on which the centers of the respective balls 960 in the radial direction are positioned; that is, the circle in FIG. 11 961) is particularly effective. This is because this deviation from the center of gravity of the shaft which is not covered by the thrust bearings can only be covered by the radial bearings, thus providing a smooth rotation.

Thus, by employing the above-mentioned rotating structure in the flat panel display, smooth rotation can be obtained in the flat panel display even if the display unit is disposed forwardly outside the edge of the thrust bearing.

According to the present embodiment, a stopper (or collar) 970 for holding the rotating shaft 910 is provided in the upper half of the upper unit 810 . After the rotating shaft 910 is fixed in place with the screw 940, the stopper 970 can be pressed against the rotating shaft 910 by using the screw provided on the edge of the collar, and a certain pressure is applied to the stopper 970 at the same time. Therefore, a washer 950 is attached to the upper end of the shaft in order to prevent the stopper 970 from coming off. In particular, the stopper 970 can be screwed down, and a predetermined weight (approximately 10 Kg) (referred to as "fixed position pressure") can be used to compress the stopper. As a result, wobbling of the rotation shaft in the vertical direction can be eliminated, thus providing a smoother and more stable rotation.

Third Embodiment: Flat Panel Display Equipped with Rotation Speed Reducing Structure

The rotation speed reducing structure of the flat panel display according to the present embodiment can be used in the stand supporting part of the vertical flat panel display shown in FIGS. 1 and 2 . A rotation speed reducing structure may be formed inside the rotation unit 210 .

FIG. 13 shows a cross-sectional view of a rotating unit 210 in which the rotating structure used in the stand-up flat panel display of the present invention is included. In FIG. 13 , the rotating structure includes a driving motor 1310 , a worm 1311 , a first gear 1320 , a second gear 1330 , a third gear 1340 , and a position sensor 1350 . The driving motor 1310 is an electrical motor. For example, the worm 1311, the first gear 1320, the second gear 1330 and the third gear 1340 are all made of plastic.

Figure 14 shows a side sectional view of the rotating structure. As seen from this figure, the worm 1311 meshes with the lower gear of the first gear 1320 . The upper gear of the first gear 1320 meshes with the upper gear of the second gear 1330 . The lower gear of the second gear 1330 is engaged with the upper gear of the third gear 1340 . The lower gear of the third gear 1340 serves as an output gear.

In the rotation structure employed in the stand-type flat panel display of this embodiment, the first gear 1320 has a function as a torque limiting gear that reduces the rotation speed. The structure of the first gear 1320 can be shown in detail in the enlarged cross-sectional view shown in FIG. 15 . As shown in FIG. 15 , the first gear 1320 includes a gear base 1321 , an upper gear 1322 , a lower gear 1323 , a spring 1324 , and a friction member 1325 .

The upper gear 1322 is fixed on the gear base 1321 and thus integrated. The lower gear 1323 may be mounted on the shaft portion of the gear base 1321 in any manner. The spring 1324 is made of, for example, conventional material, and is adapted to apply a little pressure to the upper gear 1322 and the lower gear 1323 at all times. The friction member 1325 is made of such as felt, and is fixed on the gear base 1321 with glue, and thus integrated. The friction member 1325 generates a predetermined level of friction between the gear base 1321 and the lower gear 1323 .

Then, the rotation structure constituted in the stand-type flat panel display according to the present embodiment has the following operations.

Referring to FIG. 13 , when the drive motor 1310 is driven, the worm 1311 rotates, and the rotation of the worm 1311 is sequentially transmitted to the first gear 1320 , the second gear 1330 and the third gear 1340 , and then output from the lower gear of the third gear 1340 .

Now, assume that a rotational load has been applied to the stand flat panel display according to the present embodiment due to an obstacle or a human hand while it is in a direction opposite to the automatic rotation direction. The rotating payload camera is transferred from the lower gear of the third gear 1340 to the second gear 1330 and then to the first gear 1320 . If a rotational load is applied to the first gear 1320, which is a torque limiting gear, and the applied load is greater than a predetermined level, the clutch structure in the first gear 1320 will be activated, thereby reducing the rotational load, as as discussed below.

Referring to FIG. 15 , the gear base 1321 of the first gear 1320 and the lower gear 1323 are used to frictionally slide against each other through a friction member 1325 . When the driving motor 1310 is driven and the rotating structure normally performs automatic rotation, an electrostatic friction force is generated between the self-friction member 1325 and the lower gear 1323 . As a result, the rotation of the worm 1311 is transmitted to the gear base 1321 and the upper gear 1322 without loss.

However, if the applied rotational load exceeds the electrostatic friction force between the friction member 1325 and the lower gear 1323 , the lower gear 1323 rotates while frictionally sliding on the friction member 1325 . As a result, the rotational load transmitted from the lower gear of the second gear 1340 is reduced between the friction member 1325 and the lower gear 1323 . Thus, in this structure, there is not much kinetic energy friction between the friction member 1325 and the lower gear 1323 to be transmitted to the drive motor 1310, no matter how much rotational load is applied to the third gear from the outside.

therefore. The rotational driving force generated by the driving motor 1310 will never conflict with the excessive frictional force externally applied to the rotating structure during automatic rotation. The various components of the rotating structure can then share any excess load.

When the rotating unit is stopped, it is possible to manually time too much rotating load by the user. In this case, the rotational load can be applied through the third gear 1340 and can be reduced by the first gear 1320 so that the various components are not subjected to excessive loads.

In the rotating structure of the vertical flat panel display of this embodiment, the coefficient of friction between the gear base 1321 of the first gear 1320 and the lower gear 1323 can be adjusted by adjusting the force of the spring 1324 . In addition, the coefficient of friction can also be significantly adjusted by selecting the material of the friction member 1325 .

The standing flat panel display according to this embodiment can further configure a position sensor 1350 on the rotating structure part. The position sensor 1350 may be used to detect the current rotational position by detecting the inner wall of the rotational unit.

Preferably, for example, when the vertical flat panel display of this embodiment is actually installed indoors, the rotating structure should have a certain rotational torque so that the display unit cannot rotate due to the wind, but can be slightly exerted by the user. Rotate the pressure to rotate. For example, friction member 1325 and lower gear 1323 should preferably begin to slide against each other once a load of about 1.5 Kg is applied.

While discussing the rotation-speed reducing structure in a vertical flat panel display using an embodiment, various improvements or changes can be added in this embodiment. For example, the torque limiting gear does not necessarily have to have the first gear 1320, and the second or third gear may function as a torque limiting gear. Additionally, multiple torque limiting gears may be provided in the rotating configuration.

in conclusion

The position adjustment structure, the rotating shaft bearing structure and the rotation-speed reduction structure of the present invention have been specifically shown and discussed with reference to the above-mentioned specific embodiments, and those skilled in the art should realize that various variations in the above-mentioned structures and/or functions Modifications or improvements are made without departing from the spirit and scope of the invention.

industrial application

According to the position adjustment structure of the present invention, the position of the display screen unit of the vertical flat panel display configured with the rotating structure can be finely adjusted so that the display screen unit can be kept horizontal.

According to the rotation-circumference bearing structure of the present invention, smooth and stable rotation can be obtained in a vertical flat panel display even if the center of gravity of the display unit and the main body unit of the flat panel display deviates from the rotation center of the rotating structure therebetween.

Furthermore, according to the rotation speed reducing structure of the present invention applicable to a stand type flat panel display, various components in the stand of the device can be prevented from excessive or abnormal rotation load during the rotation of the stand.

The flat panel display according to the present invention can be applied to a vertical flat panel display equipped with a display screen such as an LCD, plasma, or EL display.

In particular, the present invention is applicable to vertical flat panel displays for commercial or domestic purposes configured with large-sized display screens.

Claims (7)

1. flat-panel monitor, it is characterized in that, described flat-panel monitor comprises a main unit with display screen, a carrier unit, and one be used for the rotational structure that main unit horizontally rotates with respect to carrier unit, wherein, described rotational structure can be used in case the rotary load that applied reduces the transmission of rotary load when exceeding certain level;

Described rotational structure comprises two or more gears, and these two or more gears are gears of torque limited and are applicable in a single day the rotary load that is applied just reduces the transmission of rotary load when exceeding certain level;

Described torque limited gear comprises upper gear and undergear, and wherein, described upper gear and described undergear are applicable in a single day the rotary load that is applied just reduces the transmission of rotary load by friction slip when exceeding certain level.

2. according to the described flat-panel monitor of claim 1, it is characterized in that, described torque limited gear comprises a gear pedestal, a upper gear that is fixed on the gear pedestal, and undergear that is arranged between gear pedestal and the upper gear, wherein, described gear pedestal has one and is arranged on it facing to the lip-deep friction means of described undergear, and elastomeric element that is arranged between the gear of upper and lower, described elastomeric element is applicable to undergear pressing friction parts, make undergear and gear pedestal friction slip mutually, to reduce the transmission of rotary load.

3. according to claim 1 or 2 described flat-panel monitors, it is characterized in that described rotational structure comprises a drive motors and can rotate automatically.

4. according to the described flat-panel monitor of claim 3, it is characterized in that described flat-panel monitor further comprises the parts that are used to accept straighforward operation, the rotation of wherein said rotational structure can be controlled by straighforward operation.

5. according to claim 1 or 2 described flat-panel monitors, it is characterized in that described rotational structure comprises a position transducer and can discern it self position of rotation.

6. according to the described flat-panel monitor of claim 1, it is characterized in that, described rotational structure is applicable to the rotary speed that reduces between motor and gear or between gear, described rotational structure further comprises a torque limited gear, wherein, in case just reduce the transmission of rotary load during the mutual friction slip of the upper gear of torque limited gear and undergear.

7. according to the described flat-panel monitor of claim 6, it is characterized in that, described torque limited gear comprises a gear pedestal, it can be fixed on upper gear on the pedestal, and undergear is arranged between gear pedestal and the upper gear, wherein, described gear pedestal has a lip-deep friction means that is arranged on it facing to undergear, and elastomeric element that is arranged between the gear of upper and lower, described elastomeric element is applicable to undergear is compressed on the self-friction parts, make undergear and gear pedestal friction slip mutually, to reduce the transmission of rotary load.

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