Patent Application
20230380089
The present invention relates to a display device and a stand.
For example, Patent Literature (PTL) 1 discloses a technique to enhance the mobility of a display device by holding the display device using a stand that includes casters.
Recent years have seen the development of techniques in which a tuner device and a display device are provided separately, and broadcast signals are transmitted wirelessly from the tuner device to the display device. In such cases, since there is no need for an antenna cable, the degree of freedom of movement is enhanced, and the display device may be moved more frequently than in the past. Here, when the hardness of each caster is high, rolling noise will be louder. On the other hand, when the hardness of each caster is low, casters will become deformed (creep deformation) if left alone for extended periods of time, thereby resulting in reduced stability while in motion.
An object of the present invention is to provide a display device and a stand that are capable of inhibiting caster deformation while suppressing rolling noise.
A display device according to one aspect of the present invention includes a body that displays an image and a base that supports the body in a state where the base is placed on a floor surface. The base includes a plurality of casters that roll on the floor surface, and the plurality of casters include at least one first caster and at least one second caster having a hardness lower than a hardness of the first caster.
A stand according to one aspect of the present invention is a stand that supports a display device and includes a base that holds the display device in a state where the base is placed on a floor surface. The base includes a plurality of casters that roll on the floor surface, and the plurality of casters include at least one first caster and at least one second caster having a hardness lower than a hardness of the first caster.
The present invention can provide a display device and a stand that are capable of inhibiting caster deformation while suppressing rolling noise.
Hereinafter, embodiments of display devices, and the like, according to the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments described below each illustrate a specific, preferred example of the present invention. Accordingly, the numerical values, shapes, materials, elements, arrangement and connection states of the elements, etc., described in the following embodiments are mere examples, and are therefore not intended to limit the present invention.
Note that the accompanying drawings and the following descriptions are provided not to limit the subject matter contained in the claims, but to aid those skilled in the art to adequately understand the present invention.
It should be noted that the respective figures are schematic diagrams and are not necessarily precise illustrations. Moreover, elements that are substantially the same are given the same reference signs in the respective figures, and redundant descriptions may be omitted or simplified.
First, display device 100 according to Embodiment 1 will be described.
Furthermore, display device 100 is a display device with an integrated stand. Specifically, display device 100 includes body 10 that displays images and stand 20 that supports body 10. Stand 20 includes a single column 21 that is connected to body 10 and supports body 10 from below, and base 22 that is placed on a floor surface and supports body 10 via column 21.
Column 21 stands vertically from approximately the central portion of the top surface of base 22. Specifically, the upper end of column 21 is fixed to body 10, and the bottom end of column 21 is fixed to base 22. Column 21 is placed at a position that overlaps center of gravity P (see
Wiring that supplies power to body 10 is provided inside of column 21. Although
Next, base 22 will be described in detail.
Base body 221 is disc shaped, and storage section 229, which can be opened and closed and is used to store power cable 15, is placed on the bottom surface of base body 221. Furthermore, a plurality of recessed portions 222 are provided on the bottom surface of base body 221, and each of casters 23 are provided inside a different one of recessed portions 222. The plurality of recessed portions 222 are evenly arranged in a circumferential direction on the periphery of base body 221. In the present embodiment, six recessed portions 222 are provided, and it can be said that recessed portions 222 are disposed to coincide with the vertices of a virtual hexagon. Here, it should be noted that of the six recessed portions 222, two recessed portions 222a are arranged in a direction parallel to display surface 111 of body 10, in positions that overlap body 10 in a plan view of base 22. The two recessed portions 222a are arranged in the direction parallel to display surface 111 so that the other four recessed portions 222b are disposed therebetween. In other words, out of all recessed portions 222, the two recessed portions 222a are disposed at both ends in the direction parallel to display surface 111. Moreover, the two recessed portions 222a do not necessarily need to overlap body 10 in a plan view of base 22. The other four recessed portions 222b are disposed at positions in front of or behind of body 10. Furthermore, the other four recessed portions 222b are located further inwards in the widthwise direction (left-right direction) of body 10 than the two recessed portions 222a.
The hardness of wheels 24 of second casters 232 is lower than the hardness of wheels 24 of first casters 231. Specifically, different materials are used to set the hardness of wheels 24 of first casters and wheels 24 of second casters 232. For example, wheels 24 of first casters 231 are formed using nylon, while wheels 24 of second casters 232 are formed using elastomer or urethane. It should be noted that the materials described here are merely given as examples, and any materials may be used as long as a relationship where the hardness of wheels 24 of second casters 232 is lower than the hardness of wheels 24 of first casters 231 is satisfied. Furthermore, the structure of wheels 24 may be used to adjust hardness. For example, even when the same material is used to form wheels 24 of first casters 231 and wheels 24 of second casters 232, hardness may be adjusted by providing wheels 24 of first casters 231 with a denser structure and by providing wheels 24 of second casters 232 with a sparser structure. In this manner, the two first casters 231 having relatively high hardness are provided within the two recessed portions 222a as illustrated in
Next, movement related to display device 100 will be described.
Moreover, since the two first casters 231 are arranged to overlap body 10 in a plan view of base 22, first casters 231 are subjected to a higher load compared to the four second casters 232. Accordingly, when hardness of the two first casters 231 is low, friction with the floor surface will be high, and the display device will tip over when traveling over surfaces uneven with the floor, such as carpet 99, or the like, or when turning, thereby resulting in unstable traveling performance. This is quite evident in the casters 23 that are disposed at the leading edge of the path of travel. However, in the present embodiment, since the hardness of the two first casters 231 is set higher than the hardness of second casters 232, friction with the floor surface is reduced, thereby making it possible to stabilize traveling performance. In particular, since the two first casters 231 are positioned at the leading edges of each of the paths of travel Y1, first casters 231 are suitable for stabilizing traveling performance.
Furthermore, in a case where the display device is at rest and it is assumed that all six of the casters are second casters 232, the deadweight of display device 100 will cause creep deformation of each of the second casters 232. In contrast, in the present embodiment, base body 221, column 21, and body 10 are supported by two first casters 231 having high hardness and four second casters 232 having low hardness. Since each first caster 231 has relatively high hardness, deformation is unlikely to occur. Furthermore, as long as each first caster 231 is able to maintain its original shape, load exerted on each second caster 232 having relatively low hardness will be reduced, thereby inhibiting deformation of each second caster 232. In other words, since deformation of each caster 23 is reduced, stable traveling performance can be maintained.
As described above, display device 100 according to the embodiment includes body 10 that displays images and base 22, which is placed on a floor surface and supports body 10. Base 22 includes a plurality of casters 23 that roll on a floor surface. The plurality of casters 23 include at least one first caster 231 and at least one second caster 232 having a hardness lower than the hardness of first caster 231.
Accordingly, since the hardness of second caster 232 is lower than the hardness of first caster 231, rolling noise can be reduced when compared to a case where all casters 23 are first casters 231. At the same time, since first caster 231 has a hardness higher than the hardness of second caster 232, deformation of each caster 23 (first caster 231 and second caster 232) can be inhibited when compared to a case where all casters 23 are second casters 232. Consequently, it is possible to provide a display device 100 for which deformation of casters 23 can be inhibited while suppressing rolling noise.
Furthermore, the plurality of casters 23 are arranged in a circumferential direction on base 22, and two first casters 231 are provided, with the two first casters arranged in a direction parallel to display surface 111 of body 10, in positions that overlap body 10 in a plan view of base 22.
Accordingly, since two first casters 231 having high hardness are arranged in the direction parallel to display surface 111 of body 10, in positions that overlap body 10 in a plan view of base 22, stable traveling performance can be achieved when the display device is rolling over surfaces uneven with the floor or when turning.
Furthermore, base 22 is disposed in a position that overlaps center of gravity P of body 10 in a plan view of base 22. Both side portions of body 10 protrude beyond base 22 in a plan view of base 22.
Here, even when base 22 is disposed to overlap center of gravity P of body 10, if both side portions of body 10 protrude beyond base 22, the display device becomes prone to tipping over when rolling over surfaces uneven with the floor or when turning. Even for such forms of display device 100 that are prone to tipping over, traveling performance can be enhanced since first casters 231 and second casters 232 are provided.
Furthermore, display device 100 includes column 21 that stands in a manner extending from base 22 and supports body 10.
As described earlier, display device 100 according to the present embodiment achieves stable traveling performance by way of first casters 231 and second casters 232. If traveling performance is stabilized, the portion that connects body 10 and base 22 can be simplified. Accordingly, in the present embodiment, a simple design has been realized by using column 21 as the portion that connects body 10 and base 22.
In Embodiment 1 as described above, an example is given of display device 100 with an integrated stand. In the present embodiment, an example is given of display device 100A and stand 300A, which are provided as separate units. In the following descriptions, portions that are equivalent to that of Embodiment 1 are given the same reference signs and descriptions thereof may be omitted.
Moreover, latching components, such as bolts, or the like, may be used to latch display device 100A onto restricting component 310a. In this case, it is assumed that the direction parallel to display surface of display device 100A is the direction in which the two first casters 231 are lined up. In this case, the bottom surface of display device 100A may be fixed to restricting component 310a using latching components, and restricting component 310a may be of a shape that allows latching components to latch onto the rear surface of display device 100A. Furthermore, in this case, the lengthwise direction of the restricting component need not be parallel to the display surface, and the restricting component need not have an elongated shape.
As described above, stand 300A that supports display device 100A includes base 22 which is placed on a floor surface and holds display device 100A. Base 22 includes a plurality of casters 23 that roll on the floor surface. The plurality of casters 23 include at least one first caster 231 and at least one second caster 232 having a hardness lower than the hardness of first caster 231.
Accordingly, since the hardness of second caster 232 is lower than the hardness of first caster 231, rolling noise can be reduced when compared to cases where all casters 23 are first casters 231. At the same time, since the hardness of first caster 231 is higher than the hardness of second caster 232, deformation can be inhibited for each caster 23 (first caster 231 and second caster 232) when compared to cases where all casters 23 are second casters 232. Consequently, it is possible to provide stand 300A capable of inhibiting deformation of casters 23 while suppressing rolling noise.
Furthermore, stand 300A includes restricting component 310a that restricts the position of display device 100A. A plurality of casters 23 are arranged in a circumferential direction on base 22. Two first casters 231 are provided. Restricting component 310a restricts the position of display device 100A to keep the two first casters 231 arranged in a direction parallel to display surface 111 of display device 100A, in positions that overlap display device 100A in a plan view of base 22.
Accordingly, since restricting component 310a causes two first casters 231 having high hardness to be arranged in the direction parallel to display surface 111 of body 10, in positions that overlap body 10 in a plan view of base 22, traveling performance when the display device is rolling over surfaces uneven with the floor or when turning can be stabilized.
Although the display device and stand according to the present invention have been described based on the above embodiments, the present invention is not limited to the above embodiments.
For example, in the above embodiments, a case where there is only a single column 21 connecting base 22 and body 10 is given as an example. However, two or more columns may be provided. For example, when a plurality of columns are provided, the body can be supported in a stable manner. Furthermore, the base and the body do not need to be connected using a column. That is to say, the body may be placed directly on top of the base.
In the above embodiments, an example is given where six casters 23 are provided and where casters 23 are disposed at the vertices of a virtual, regular hexagon. However, casters 23 may be provided in any number and/or layout that satisfies standardized tipping angles. A tipping angle is the degree of titling of a device in relation to the vertical direction and serves as an index used for preventing the device from tipping over when the device is tilted at an angle that does not exceed the tipping angle. For example, there are cases where tipping angles have been standardized to be dependent on device size (height), and in such cases, the appropriate number and/or layout of casters 23 disposed are determined based on device size.
Hereinafter, other layouts for first casters 231 and second casters 232 will be described.
(a) in
(b) in
(c) in
Furthermore, the above-mentioned embodiments illustrate examples where a plurality of recessed portions 222 that house respective casters 23 are provided on the bottom surface of base body 221. However, it should be noted that the bottom surface of base body 221 may be entirely flat, and each caster 23 may be disposed on this flat bottom surface.
Furthermore, although the above-mentioned embodiments illustrate examples where base body 221 is of a circular board shape, the base body may be of any kind of external shape. For example, other possible external shapes for the base body include various elliptical boards, polygonal boards, and the like.
Although the above-mentioned embodiments illustrate examples where casters 23 are swiveling casters, any kind of casters that can roll on a floor surface may be used. Other possible casters include non-swiveling casters. Specifically, in such casters, the support component is fixed to or integrated with the base plate so as to not swivel. In such cases, the wheels are attached to the base to face a direction that enables stand 20 to be moved in a direction parallel to display surface 111 by rolling the wheels on a floor surface. That is to say, the wheels are attached to the base so that the axles of the wheels are facing a direction that is orthogonal to display surface 111.
Other examples of casters include casters that have an axle supported by a support component in a cantilever arrangement. Specifically, only one end of the axle of the wheel is supported by the support component to freely rotate.
Other examples of casters include casters having one support component that supports two wheels. Specifically, the two wheels are supported at both ends of an axle, and the support component supports the central portion of the axle. When such casters are used as first casters and second casters, second casters should have low hardness for both wheels, and first casters should have at least one of the wheels having a hardness higher than the hardness of the second casters.
Other examples of casters include casters having spherical wheels. Specifically, such a spherical wheel is supported to rotate freely by a support component that includes a ball housing. In this case, since the spherical wheel rotates in any direction, the stand can be moved in any direction.
In these examples, the same type of casters or different types of casters may be used for the first casters and second casters. In either case, by making the hardness of the second casters lower than the hardness of the first casters, the effects of the present disclosure can be obtained.
Additionally, forms obtained by various modifications to the embodiments and variations conceivable by those skilled in the art, as well as forms resulting from arbitrary combinations of elements and functions in the embodiments that do not depart from the essence of the present invention are intended to be included in the scope of the present invention.
The present invention is widely applicable to, for example, display devices and stands that include casters.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-122903 | Jul 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/014857 | 3/28/2022 | WO |
