JP6864577B2 - Stands and television equipment - Google Patents

Description

The present invention relates to a stand and a television device, and more particularly to a stand and a television device used to hold a display device.

This type of stand is attached, for example, to the bottom of a thin display device such as a television or monitor to hold the display device.
Further, in order to make the display screen face the viewer, the display device is required to have a function of moving the orientation of the display screen to the left or right (also referred to as a swivel function) regardless of the size of the display screen. It is said that the presence or absence of this swivel function has a great influence on consumers' purchasing decisions.

In recent years, with the spread of IoT (Internet of Things) and the like, it is required to remotely control a display device from a remote location, and it is possible to rotate the display screen frequently.
When the drive mechanism is frequently started and stopped in order to rotate the display screen, it is caused by sliding between the drive mechanism and peripheral members, impact between the drive mechanism and peripheral members, and vibration of the drive mechanism and peripheral members. Abrasion dust (hereinafter referred to as dust) may be generated, and the dust may adhere to the drive mechanism. Alternatively, dust may enter from the outside and adhere to the drive mechanism. For example, Patent Document 1 discloses a technique in which a cleaning member cleans a housing in response to a rotational drive.

Japanese Unexamined Patent Publication No. 2015-30345

By the way, there is one that detects the position of the drive mechanism by using, for example, a photo sensor and a position detection plate. A photo sensor is installed in the drive mechanism, and when the light is emitted toward the position detection plate and the light reflected by the position detection plate is detected, the position of the drive mechanism can be obtained.
In this case, it is necessary to eliminate obstacles at the position of the position detection plate where the photo sensor irradiates light. However, the cleaning member described in Patent Document 1 is a brush that is concentrated in one place, and blocks the light emitted from the photo sensor. Therefore, a configuration that prevents poor position detection due to adhesion of dust is desired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stand and a television device for preventing position detection failure due to adhesion of dust.

In order to solve the above problems, the first technical means of the present invention is a stand used for holding a display device, and the stand rotates with respect to the base portion and the base portion. A support unit for holding the display device, the base unit has a position detection plate indicating a rotation position of the support unit, and the support unit rotates the display screen of the display device. It is characterized by having a detection unit that detects the position detection plate and a cleaning member that covers the periphery of the detection unit and comes into contact with the position detection plate.

The second technical means is characterized in that, in the first technical means, the cleaning member is formed in a tubular shape having a quadrangular cross section.

The third technical means is characterized in that, in the first technical means, the cleaning member is formed in a tubular shape having a circular cross section.

The fourth technical means is characterized in that, in the first technical means, the cleaning member is formed in a tubular shape having a sharp edge in the traveling direction of the rotating support portion. is there.

The fifth technical means is characterized in that it is a television device provided with the stand of any one of the first to the fourth.

According to the present invention, the cleaning member is provided so as to cover the periphery of the detection unit, and it is possible to suppress the intrusion of dust into the position of the position detection plate facing the detection unit. Further, since the cleaning member can remove the dust adhering to the position detection plate, it is possible to prevent the position detection failure due to the adhering of the dust.

It is a perspective view of the display device which installed the stand of one Embodiment of this invention. It is an exploded perspective view of the stand. It is an external perspective view of a support part and a base part. It is an exploded perspective view of a support part and a base part. It is an external perspective view of a cleaning member. It is external perspective view of the cleaning member in Embodiments 2 and 3. It is external perspective view of the 1st and 2nd slide covers. It is a rear view of a support part. It is a figure for demonstrating the operation of a stand.

(Embodiment 1)
FIG. 1 is a perspective view of a display device on which a stand according to an embodiment of the present invention is installed. The stand 1 of the present embodiment has a one-legged structure, and is attached to the lower part of the center (also referred to as a panel center) of the display device (for example, a thin television) 2. In FIG. 1, the display device 2 is viewed from diagonally rear left, and the back surface 3 of the display device 2 is provided with, for example, a plurality of holes 4 for heat dissipation.

The display device 2 can change the orientation of the display screen by rotating in the horizontal direction by the swivel mechanism of the stand 1. The configuration and operation of the stand 1 will be described in detail below.

FIG. 2 is an exploded perspective view of the stand. The stand 1 includes a base portion (also referred to as a stand base) 10 and a support portion (also referred to as a stand support) 20. The base portion 10 and the support portion 20 are mainly made of resin, for example.
The base portion 10 has a rotation support member 11 at a position corresponding to the panel center, and the front side of the display device, that is, the front of the rotation support member 11 is opened, for example, to form a frame shape and rotate. The rear part of the support member 11 is closed and formed in a plate shape.

The rotation support member 11 is made of, for example, a columnar metal, and can rotate with respect to, for example, the base portion 10. Although the rotation support member 11 shown in the figure is provided upright with respect to the base portion 10, it may be provided at an angle with respect to the base portion 10. Further, the rotation support member 11 may be a fixed shaft or a member that supports the rotation shaft as long as the display device can be rotationally supported.

The support unit 20 can rotate integrally with the rotation support member 11, and has a drive unit 30 behind the display device 2.
In this way, since the drive unit 30 is provided not in the base portion 10 but in the support portion 20, it is possible to reduce design restrictions on the base portion 10. Further, if the drive unit 30 is provided on the back side of the display device, the drive unit 30 is difficult to see from the front side of the display device, which contributes to the provision of a display device with a stand having a high design including design. ..

The stand of this embodiment has a dustproof structure. FIG. 3 is an external perspective view of the support portion and the base portion, and FIG. 4 is an exploded perspective view of the support portion and the base portion. 5 is an external perspective view of the cleaning member, FIG. 7 is an external perspective view of the first slide cover and the second slide cover, and FIG. 8 is a rear view of the support portion.

FIG. 3A shows the support portion 20 and the base portion 10 from diagonally left rearward, and the base portion 10 includes a dustproof box 13 capable of accommodating the movable gear 38, the fixed gear 12, and the position detection plate 14 shown in FIG. The dustproof box 13 is arranged behind the rotation support member 11 described with reference to FIG. As shown in FIG. 4, the dustproof box 13 is formed in a cup shape, for example, has an upper opening 13c for receiving the movable gear 38 and the fixed gear 12, and a side surface 13b is erected around the upper opening 13c. At the lower end of the side surface 13b, a lower surface 13a through which the leg portion 12a of the fixed gear 12 can be inserted is provided.

The fixed gear 12 has a trapezoidal portion 12b above the leg portion 12a, and a tooth profile that meshes with the movable gear 38 is formed on the side surface of the trapezoidal portion 12b. A position detection plate 14 is installed on the upper surface of the trapezoidal portion 12b. The position detection plate 14 is provided with white or silver marks at positions corresponding to, for example, a central position, a position of 15 ° to the left, and a position of 15 ° to the right.

The drive unit 30 has a flat plate-shaped unit base 31. In the unit base 31, for example, the lower surface 47 shown in FIG. 3B is directly connected to the upper surface of the rotation support member 11, and can rotate integrally with the rotation support member 11. On the other hand, the display screen 2 described with reference to FIG. 1 can be fixed to the upper surface 45 of the unit base 31.
As shown in FIGS. 3 (A) and 3 (B) and FIG. 8, the unit base 31 is provided with an opening 46 for a curved slide cover provided so as to penetrate the upper surface 45 and the lower surface 47, and FIG. The upward protrusion 64 of the first slide cover 60 and the upward protrusion 74 of the second slide cover 70 shown in FIG. 7 can be accepted from below, for example.

As shown in FIG. 8, the unit base 31 has a rectangular opening 47a for a photosensor on the rear side of the opening 46 for the slide cover. The opening 47a is also formed so as to penetrate the upper surface 45 and the lower surface 47. Further, half punch portions 48 and 49 are provided on both the left and right sides of the opening 47a for the photosensor. The half punch portion 48 is located on the right side of the opening 47a for the photosensor as seen in FIG. 8, and protrudes downward from the lower surface 47 of the unit base 31, and is located at the end of the opening 63 of the first slide cover 60. It can be contacted. The half punch portion 49 is located on the left side of the opening 47a for the photosensor as seen in FIG. 8, projects downward from the lower surface 47 of the unit base 31, and abuts on the end of the opening 73 of the second slide cover 70. It is possible.

As shown in FIG. 4, the drive shaft 39 is rotatably supported by the electric motor 33. The electric motor 33 is fixed to the unit base 31 with screws, for example. The electric motor 33 is, for example, an AC servomotor whose rotation amount, rotation direction, and rotation speed can be controlled, and the drive shaft 39 can be forward-reversed based on a drive signal from a control unit (not shown).
A movable gear 38 is provided at the lower end of the drive shaft 39, and meshes with the fixed gear 12 below the unit base 31. The electric motor 33 is fixed to the upper surface 45 of the unit base 31 by using a spring guide ring 50 having a substantially tubular shape.

The spring guide ring 50 has a guide portion 53 that guides the electric motor 33 on the inner surface and guides the tension spring 55 on the outer surface, and in the center of the guide portion 53, a central hole through which the drive shaft 39 is inserted (not shown). Is formed. On the front side of the guide portion 53, a fixing portion 52 for fixing with a screw, for example, is provided on the upper surface 45 of the unit base 31, and on the rear side of the guide portion 53, a pressing portion 54 for pressing the printed circuit board 56 downward is provided. Has been done.

The tension spring 55 is for returning the positions of the first and second slide covers 60 and 70 divided into two, one end of the tension spring 55 is an upward protrusion 64 of the first slide cover 60, and the other end is a second. It is attached to each of the upward protrusions 74 of the slide cover 70.
The printed circuit board 56 has a photo sensor 57 installed in the center of the back surface, is pressed from above by the pressing portion 54 of the spring guide ring 50, and is fixed to the upper surface 45 of the unit base 31. The photo sensor 57 corresponds to the detection unit of the present invention.

As shown in FIGS. 4 and 8, a cleaning member 58 is installed around the photo sensor 57. Specifically, as shown in FIG. 5, the cleaning member 58 is made of rubber, for example, and is formed in a tubular shape having a quadrangular cross section. The front surface 58a covers the front of the photosensor 57, the rear surface 58b covers the rear of the photosensor 57, and the side surfaces 58c and 58d cover the sides of the photosensor 57. When the upper end 58e is attached to the printed circuit board 56 (may be adhered), the lower ends of the front surface 58a, the rear surface 58b, the side surfaces 58c, and 58d come into contact with the marked surfaces of the position detection plate 14, respectively.

(Embodiment 2)
In FIG. 5, an example of the square tubular cleaning member 58 has been described. However, the present invention is not limited to this example. For example, the cleaning member 58 formed in a tubular shape having a circular cross section as shown in FIG. 6A may be used. In this case, since the peripheral surface 58f is curved, the dust adhering to the position detection plate 14 can be easily discharged in the front-rear direction as compared with the square tubular cleaning member. In addition, general-purpose products can be used, facilitating the manufacture of cleaning members.
(Embodiment 3)
Alternatively, as shown in FIG. 6B, the cleaning member 58 may have an edge 58g sharpened in the traveling direction of the unit base 31. In this case, the edges 58g are provided between the side surfaces 58c and the side surfaces 58d, respectively, and the dust adhering to the position detection plate 14 can be scraped off as the unit base 31 advances in the circumferential direction. ..

The photo sensor 57 can irradiate light toward the position detection plate 14 located below, and the photo sensor 57 detects the light reflected by the white and silver marks of the position detection plate 14, thereby rotating the drive unit 30. The moving position can be obtained.
The first slide cover 60 is arranged on the left side in a plan view, and the second slide cover 70 is arranged on the right side in a plan view, and can be interlocked with the rotation of the unit base 31.

As shown in FIG. 7A, the first slide cover 60 has a horizontal surface portion 61 that covers the upper opening 13c of the dustproof box 13 described with reference to FIG. 4, and the upward protrusion 64 is upward from the upper surface of the horizontal surface portion 61. Can project toward and hold the end of the tension spring 55. On the front side of the upward protrusion 64, an opening 62 for the drive shaft for receiving the drive shaft 39 is provided in a curved shape, and on the rear side of the upward protrusion 64, for a photo sensor for receiving the photo sensor 57. The opening 63 is provided in a curved shape.

The first slide cover 60 is arranged below the unit base 31, and the upward protrusion 64 is loosely fitted into the opening 46 for the slide cover from below the unit base 31 so as to project above the unit base 31.
Further, as shown in FIG. 7B, the first slide cover 60 has an L-shaped downward projecting piece 65. The downward projecting piece 65 is formed from the front end to the side end of the horizontal surface portion 61, projects downward from the horizontal surface portion 61, and is formed so as to be in contact with the side surface 13b of the dustproof box 13 as shown in FIG. 3 (B). Has been done.

Like the first slide cover 60, the second slide cover 70 also has a horizontal surface portion 71 that covers the upper opening 13c of the dustproof box 13. The upward protrusion 74 projects upward from the upper surface of the horizontal surface portion 71. An opening 72 for a drive shaft for passing the drive shaft 39 is provided on the front side of the upward protrusion 74 in a curved shape, and an opening for a photo sensor for receiving the photo sensor 57 is provided on the rear side of the upward protrusion 74. 73 is provided in a curved shape. The second slide cover 70 is also arranged below the unit base 31, and the upward protrusion 74 is loosely fitted in the opening 46 for the slide cover.

Further, as shown in FIG. 7B, the second slide cover 70 also has an L-shaped downward projecting piece 75 formed from the front end to the side end of the horizontal surface portion 71, and is provided on the side surface 13b of the dustproof box 13. Can be contacted.

FIG. 9 is a diagram for explaining the operation of the stand. In FIG. 9, the display device, the dustproof box 13, the tension spring 55, and the like are omitted in order to explain the relationship between the unit base 31 and the first and second slide covers 60 and 70.
In a state where the movable gear 38 is located substantially in the center of the fixed gear 12 and the display screen of the display device faces directly in front, the drive shaft 39 starts to rotate, for example, clockwise in a plan view as the electric motor 33 is driven. Then, one end of the unit base 31 (the left end of the unit base 31 as seen in FIG. 9A) starts moving (rotating) forward.

When one end of the unit base 31 starts rotating, the cleaning member 58 removes dust adhering to the position detection plate 14. After one end of the unit base 31 starts rotating, as shown in FIG. 9B, when the half punch portion 48 of the unit base 31 comes into contact with the end portion of the opening 63 for the photo sensor of the first slide cover 60. , The contact between the downward projecting piece 65 of the first slide cover 60 and the side surface 13b of the dustproof box 13 is released. Then, the first slide cover 60 starts rotating together with the unit base 31 while covering the upper opening 13c of the dustproof box 13 against the urging force of the tension spring 55.

On the other hand, when the first slide cover 60 covers the upper opening 13c of the dustproof box 13 in conjunction with the rotation of the unit base 31, the downward projecting piece 75 of the second slide cover 70 comes into contact with the side surface 13b of the dustproof box 13. Therefore, even if the first slide cover 60 rotates together with the unit base 31 as shown in FIG. 9B, the second slide cover 70 does not rotate and the upper opening of the dustproof box 13 is opened. Continue to cover 13c.
Then, when the drive shaft 39 rotates, for example, clockwise in a plan view, the left end of the unit base 31 rotates as shown in FIG. 9A, so that the orientation of the display screen is changed to the left.

After that, based on the detection result of the photo sensor 57, when the drive shaft 39 rotates counterclockwise, for example, in a plan view, one end of the unit base 31 (the right end of the unit base 31 as seen in FIG. 9A) moves forward. Start moving (rotating) toward.
When one end of the unit base 31 starts rotating, the cleaning member 58 removes dust adhering to the position detection plate 14. After one end of the unit base 31 starts rotating, when the contact between the half punch portion 48 and the end portion of the opening 63 for the photo sensor is released, the first slide cover 60 is moved by the urging force of the tension spring 55. While covering the upper opening 13c of the dustproof box 13, the downward projecting piece 65 moves toward the second slide cover 70 until it contacts the side surface 13b of the dustproof box 13.

As described above, since the first and second slide covers 60 and 70 that cover the upper opening 13c of the dustproof box 13 are installed in the unit base 31, it is possible to prevent dust from entering the dustproof box 13. ..
Further, the cleaning member 58 is provided so as to cover the periphery of the photo sensor 57, and can suppress the intrusion of dust into the position of the position detection plate 14 facing the photo sensor 57. Further, since the cleaning member 58 can remove the dust adhering to the position detection plate 14, it is possible to prevent the position detection failure due to the adhering of the dust.

Further, according to the operation shown in FIG. 9, the first slide cover 60 is divided into a first slide cover 60 that is interlocked with the rotation of the unit base 31 and a second slide cover 70 that is not interlocked with the rotation of the unit base 31. Therefore, the width (length in the left-right direction) of the unit base 31 can be shortened as compared with the case where the first and second slide covers 60 and 70 are integrally formed, and the drive unit 30 can be downsized. Can be done.

1 ... stand, 2 ... display device, 3 ... back surface, 4 ... hole, 10 ... base part, 11 ... rotation support member, 12 ... fixed gear, 12a ... leg part, 12b ... trapezoidal part, 13 ... dustproof box, 13a ... Bottom surface, 13b ... Side surface, 13c ... Upper opening, 14 ... Position detection plate, 20 ... Support unit, 30 ... Drive unit, 31 ... Unit base, 33 ... Electric motor, 38 ... Movable gear, 39 ... Drive shaft, 45 ... upper surface, 46 ... opening for slide cover, 47 ... lower surface, 47a ... opening for photosensor, 48, 49 ... half punch, 50 ... spring guide ring, 52 ... fixed part, 53 ... guide part, 54 ... pressing Part, 55 ... Tension spring, 56 ... Printed substrate, 57 ... Photosensor, 58 ... Cleaning member, 58a ... Front, 58b ... Rear surface, 58c, 58d ... Side surface, 58e ... Upper end, 58f ... Peripheral surface, 58g ... Edge, 60 ... 1st slide cover, 61, 71 ... Horizontal surface, 62, 72 ... Drive shaft opening, 63, 73 ... Photosensor opening, 64, 74 ... Upward protrusion, 65, 75 ... Downward protrusion, 70 ... Second slide cover.

Claims (5)

A stand used to hold a display device
The stand includes a base portion and a support portion that rotates with respect to the base portion and holds the display device.
The base portion has a position detection plate that indicates a rotation position of the support portion.
The support unit is rotatably configured to rotate the display screen of the display device, covers the detection unit that detects the position detection plate and the periphery of the detection unit, and comes into contact with the position detection plate. A stand characterized by having a cleaning member. The stand according to claim 1, wherein the cleaning member is formed in a tubular shape having a quadrangular cross section. The stand according to claim 1, wherein the cleaning member is formed in a tubular shape having a circular cross section. The stand according to claim 1, wherein the cleaning member is formed in a tubular shape having a sharp edge in the traveling direction of the rotating support portion. A television apparatus comprising the stand according to any one of claims 1 to 4.

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