JP2004150515A - Heavy article supporting device equipped with rotating mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heavy article supporting device equipped with a rotating mechanism which can adjust the display angle in the left and right directions of a plasma TV under remote control, and can avoid an overload status caused when reaching a marginal angle or abutting on an obstacle, and whose manufacturing cost is low. <P>SOLUTION: This heavy article supporting device is provided with a base box 11, a driving means to develop rotational driving force in response to an operation signal, the rotating mechanism 13 to transmit the rotational driving force to a TV body 1A, and a stopper mechanism 14 to regulate the rotation by the rotating mechanism 13 to the range of a constant angle. The rotating mechanism 13 is provided with a supporting body 121 fixed to the TV body 1A, a fixed ring 123 fixedly arranged on the base box 11, a rotating body 122 interposed between the fixed ring 123 and the supporting body 121 and rotatable by the rotational driving force from the driving means, and bearing means (124, 26) to generate a slip and also to regulate sway in a radial direction when weight in a thrust direction is at a predetermined value or above. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is suitable for heavy objects such as a liquid crystal television and a plasma television, and is capable of rotating the heavy object in a normal or stationary state in a left-right direction by remotely or closely operating the heavy object. About.
[0002]
[Prior art]
In recent years, along with the technical progress of various types of display devices, products with large screens have been circulating in the field of television receivers. Some of these television receivers incorporate a thin display device such as a liquid crystal television or a plasma television, which is different from the conventional cathode ray tube type.
[0003]
In such a new type of television receiver, the angle at which the user looks at the screen is an important factor from the viewpoint of the visibility of the image. For this reason, in the case of a liquid crystal television having a relatively small screen, a rotation mechanism is incorporated in a stand that supports the television body (TV screen), and the television body can be rotated (swiveled) left and right about the stand. Some have added functions that can be used.
[0004]
On the other hand, this new type of television receiver has an advantage that a thin and large screen can be secured. In particular, television receivers that perform screen display by plasma emission called plasma televisions are suitable for large screens at the current technical level, and further marketability is expected in this field in the future. As the size of the screen increases, the weight of the television itself also increases. For example, in the case of a plasma television, a product with a 50-inch screen weighs more than 60 kg, and a product with a 42-inch screen weighs the latter half of 30 kg.
[0005]
[Problems to be solved by the invention]
However, conventionally, in such a heavy television receiver, if the user attempts to change the horizontal direction (rotation angle) of the screen, the only option is for the user to change the orientation while lifting the television receiver each time. . This is a very troublesome operation for the user, and since it is heavy, there is a risk that the furniture may be accidentally dropped or damaged when moving.
[0006]
On the other hand, applying the above-described rotating mechanism centering on the stand of the television body to a heavy-duty television receiver such as a plasma television is extremely difficult in terms of user operability and dropping and falling during operation. There's a problem. For this reason, there is known a structure in which, when the TV main body is heavy, a stand is provided with a rotation mechanism using an electric motor, and the TV main body is rotated left and right by the rotation mechanism.
[0007]
As described above, a television receiver using a thin display device such as a liquid crystal television or a plasma television in recent years is a market that is expected to further grow in the future, and further reduction in product cost is required.
[0008]
Therefore, from this viewpoint, it is required to reduce the manufacturing cost of the rotating mechanism of such a new type of television receiver. In addition, the user wants to easily adjust the screen angle by rotating the heavy TV body smoothly in the left and right direction, and of course, the user can continue to adjust the angle, or overload the furniture or people. There has been a demand that even if it is hung, it is desirable to be able to prevent inconvenience caused by such a situation.
[0009]
The present invention has been made in view of such a conventional problem, and allows a heavy object such as a plasma television or a home appliance to freely and stably rotate around an axis in the direction of gravity within a predetermined angle range. The angle can be adjusted, and even if the angle reaches a limit value or hits an obstacle, the overload occurs during the angle adjustment, and this overload state can be reliably avoided. It is an object of the present invention to provide a heavy-weight support device having a rotation mechanism and capable of suppressing manufacturing costs.
[0010]
[Means for Solving the Problems]
The term "heavy object" according to the present invention means "having a weight that makes it difficult to change the posture by rotating in the left and right directions by human power in a stationary state in a normal use state, An object that includes at least one of a display unit that provides a physical quantity such as sound and light and an operation unit that is accessed and operated by a person ”.
[0011]
In order to achieve the above object, according to the present invention, a heavy object supporting device including a rotation mechanism is an apparatus that supports a heavy object so as to be rotatable around a central axis in the direction of gravity of the heavy object within a certain angle range. is there. The heavy object supporting device transmits a rotational driving force from the driving means to the heavy object, a base, driving means for generating a rotational driving force required for rotating the heavy object in accordance with an operation signal. A rotation mechanism; and a stopper mechanism for restricting rotation by the rotation mechanism within the predetermined angle range. The rotation mechanism includes a support fixed to the heavy object, a fixed body fixed to the base, and a rotational driving force inserted between the fixed body and the support and driven by the driving unit. From the heavy object in the thrust direction which is interposed between the rotating body and the supporting body and between the rotating body and the fixed body, and is applied to the rotating body. And bearing means for receiving when the weight exceeds a predetermined value in a state in which slippage is generated and for restricting radial swinging of the rotating body.
[0012]
As a preferred example, the bearing means is interposed between the support and the rotating body and receives the weight in the thrust direction between the first bearing means and the rotating body and the fixed body. Second bearing means, which is rotated in the thrust direction and receives the weight in the thrust direction, and steadying means, which is rotated between the rotating body and the fixed body and regulates the swing in the radial direction. .
[0013]
For example, the first bearing means includes a first long groove having a U-shaped cross section and a ring shape formed on a surface of the support opposite to the heavy object, and a first elongated groove having a U-shaped cross section. And a plurality of first balls rotatably interposed between the first long groove and the first bottomed hole. The second bearing means has a second elongated groove having a U-shaped cross section and a ring shape formed on the other surface of the rotating body opposite to the heavy object, and A counterbore-shaped second bottomed hole formed on the surface on the heavy object side, and a plurality of second balls rotatably inserted between the second long groove and the second bottomed hole. A third bottomed hole formed in the fixed body and having an opening partially facing the rotating body, and a swingably inserted means rotatably inserted into the bottomed hole. And and a plurality of third balls abutting on the fixed body through the opening.
[0014]
Further, for example, it is desirable that the first and second long grooves and the first and second bottomed holes have the same radial position in the rotating mechanism.
[0015]
As an example, the driving means includes an electric motor capable of rotating forward and reverse, a worm coupled to a rotation shaft of the electric motor, and a wheel coupled to the worm so as to be able to transmit a rotational force. Is composed of a cylindrical portion fixed to the wheel in a state of being erected on the wheel, and a flange portion integrally extended in the radial direction from the upper end of the cylindrical portion, and the upper surface of the flange portion is It can be configured such that it forms one surface of the rotating body, and that the lower surface of the flange portion forms the other surface of the rotating body.
[0016]
In a further preferred example, the first bearing means is rotatable between a surface of the support opposite to the heavy object and one surface of the rotating body on the side of the heavy object. The second bearing means is formed by an interposed ring body, and the second bearing means has a ring-shaped long groove having a U-shaped cross section formed on the other surface of the rotating body on the side opposite to the weight. A counterbore-shaped bottomed hole formed in the surface of the body on the side of the heavy object, and a plurality of balls rotatably inserted between the long groove and the bottomed hole.
[0017]
In this case, the third bearing means can rotate the cylindrical body between the radial inner peripheral surface of the fixed body and the radial outer peripheral surface of the support body in a state in which the cylindrical body is in contact with the both surfaces. And a rotating mechanism characterized by being formed by interposing the rotating mechanism.
[0018]
Further, in this case, the support has a structure of a first flanged cylindrical body having a flange on a portion presenting a surface opposite to the heavy object, and a ring body of the first bearing means and the ring body of the first bearing means. The cylindrical body of the third bearing means has a structure of a second cylindrical body with a flange formed integrally with the ring body as a flange portion, and the rotating body has a portion which exhibits the one surface and the other surface as a flange portion. The third, second, and third flanged cylinders are formed from a radially outer third, second, and first flanged cylinder. It is also preferable to arrange them in such a manner that they are polymerized with each other in the order of the bodies.
[0019]
Preferably, at least the two flanged cylinders are formed of a resin material.
[0020]
Further, it is preferable that the bearing means has an adjusting means for adjusting the predetermined value of the weight.
[0021]
Further, it is possible to further comprise a remote control means for giving the operation signal to the drive means by remote control.
[0022]
As an example, the heavy object is a television receiver, and the television receiver is a liquid crystal television, a plasma television, or a CRT television.
[0023]
As another example, the heavy object has a providing means for providing at least one of information and a physical quantity to a person, and is a personal computer, a CAD device, a console of a medical device, a register, and a console of a manufacturing device. , One of the display devices for nursing care.
[0024]
Further, the heavy object has an operation unit operated by a person, and may be one of a refrigerator, a microwave oven, a nursing table, a nursing chair, and a car seat.
[0025]
According to the heavy object support device provided with the rotation mechanism according to the present invention, when there is no obstacle to the rotation of the heavy object around the axis, the heavy object is moved at a constant low speed within a predetermined fixed angle range. It can be rotated (swiveled) and adjusted to any angle within its range. Further, if the rotation angle of the heavy object reaches any one of the limit angles in the rotation direction, only the rotation member rotates due to slippage between the rotation member and the support, and the rotation object hangs on the heavy object. Unreasonable rotation can be absorbed. Similarly, when a heavy object is hit by an obstacle during rotation within a range of a predetermined angle in the rotation direction of the heavy object and a rotation preventing force of a predetermined value or more is applied, similarly, the rotation between the rotating body and the support As a result, only the rotating body rotates to absorb further excessive rotation of the heavy object.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, with reference to the accompanying drawings, an embodiment of a heavy object supporting device including a rotation mechanism according to the present invention will be described.
[0027]
(First Embodiment)
The first embodiment will be described with reference to FIGS.
[0028]
The heavy object supporting device having a rotation mechanism according to this embodiment will be described as a device applied to a plasma television as a heavy object.
[0029]
FIG. 1 shows an appearance of the plasma television 1. As shown in FIG. 1, a plasma television (receiver) 1 includes a television main body 1A that provides a television screen using plasma emission, and the entirety of the television main body 1A, as indicated by arrows A1 and A2, in the direction of gravity. And a stand 1 </ b> B as a heavy-weight support device that rotatably supports (swivels) around a central axis C of the optical disc in a certain angular range. The weight of the television main body 1A is, for example, about 64 kg at 50 inches and 37 kg at 42 inches.
[0030]
The stand 1B integrally incorporates a rotation mechanism for rotatably supporting the television main body 1A about the central axis C. The rotation mechanism allows the screen angle of the plasma television as a heavy object, that is, the screen to be rotated. The operator can freely adjust the viewing angle to a desired angle within a predetermined range (for example, ± 30 °) using the remote controller 1C.
[0031]
Specifically, as shown in FIGS. 2 and 3, the stand 1B includes a base box 11 (base) as a base, a driving unit 12 for generating a rotational driving force for rotating the television main body 1A, and A rotation mechanism 13 for transmitting the rotation driving force from the driving means 12 to the television main body 1A, and a stopper mechanism 14 for restricting the rotation of the rotation mechanism 13 to a predetermined angle range.
[0032]
The base box 11 has sufficient rigidity to support a heavy-weight plasma television, and is provided on a thin box body in which the driving means 12 and a part of the rotating mechanism 13 are disposed, and on a side thereof. It is formed by an auxiliary support plate (see FIGS. 1 and 3). As will be described later, the remaining portion of the rotating mechanism 13 stands up from a hole 11A formed on the upper surface of the base box 11 so as to look upward, thereby rotatably supporting the television body 1A. It is supposed to.
[0033]
Next, the rotation mechanism 13 will be described. The rotation mechanism 13 has a configuration in which a support 21, a rotating body 22, and a fixing ring 23 are arranged in this order from the side of the television main body 1A. The support 21, the rotating body 22, and the fixing ring 23 are formed of a metal material such as a plastic material, an oil-impregnated metal, a lightweight alloy material, and a steel material.
[0034]
Among these, the support 21 is formed in a shape in which a ring-shaped flange 21B is integrated with one end of a cylindrical portion 21A, and the rotation mechanism 13 in the radial direction with the flange 21B facing upward. It is located at the inner position. A bracket 24 is fixedly provided on the upper surface of the flange portion 21B of the support 21, and the bracket 24 is fixedly provided on the back surface of the television body 1A. Thus, the support 21 integrally supports the television main body 1A from below through the bracket 24. That is, by rotating the support 21, the television main body 1A can be freely rotated in the directions indicated by arrows A1 and A2 (see FIG. 1). The rotation directions of the arrows A1 and A2 indicate the rotation directions around the central axis C in the direction of gravity acting on the television body 1A.
[0035]
Similarly to the above-mentioned support body 21, the rotating body 22 is also formed by integrating a ring-shaped flange 22B at one end of a cylindrical portion 22A, and is arranged on the rotating mechanism 13 with the flange 22B facing upward. Is done. At this time, the rotating body 22 has its cylindrical portion 22A disposed at a position outside the cylindrical portion 21A of the support 21 in the radial direction via a gap of a predetermined size, and the flange 22B is connected to the flange 21B of the support 21. Is set so as to be disposed at a lower side of the device with a gap having a predetermined size.
[0036]
Further, the fixing ring 23 is a ring-shaped member having a predetermined thickness, and is fixed to the upper surface of the base box 11 located below the flange 22 </ b> B of the rotating body 22. The inner peripheral diameter of the fixing ring 23 is set to a size that almost makes contact with the outer periphery of the cylindrical portion 22A of the rotating body 22 with a predetermined clearance left.
[0037]
The rotating mechanism 13 is further provided with a plurality of balls (steel balls) 25, which are appropriately disposed between the support 21, the rotating body 22, and the fixed ring 23, and form a thrust and radial bearing. 26 and 27. Among them, a plurality of first balls (steel balls) 25 having a diameter of, for example, 8 mm that receive a load in the thrust direction are arranged between the support 21 and the rotating body 22. Further, between the rotating body 22 and the fixed ring 23, a plurality of second balls (steel balls) 26 having a diameter of, for example, 8 mm and receiving a load in the thrust direction are arranged. Further, a plurality of third balls (steel balls) 27 having a diameter of, for example, 4 mm are provided between the rotating body 22 and the fixed ring 23 to prevent blurring in the radial direction.
[0038]
Specifically, as shown in FIG. 4, a plurality of, for example, eight, bottomed holes 31 are formed in the upper surface of the flange portion 22 </ b> B of the rotating body 22 by counterboring a predetermined depth. The plurality of bottomed holes 31 are formed at equal intervals on a circumference passing through the position. Further, a U-shaped groove 32 having a U-shaped cross section with a predetermined depth is formed in a ring shape on the lower surface of the flange 21B of the support 21 in accordance with the position of the bottomed hole 31 in the radial direction. The book is perforated (see the phantom line in FIG. 4).
[0039]
As a result, a pair is formed by each bottomed hole 31 and the U-shaped groove 32 opposed thereto, and one first ball 25 is arranged and held for each pair. As a result, a thrust bearing in which the support 21 and a part of the rotating body 22 are also used as a race portion is formed. Therefore, the support body 21 and the rotating body 22 are rotatably connected to each other via a thrust bearing having the plurality of first balls 25 as a central member.
[0040]
As shown in FIG. 5, a plurality of, for example, eight, bottomed holes 33 are formed in the fixing ring 23 by counterboring a predetermined depth. The plurality of bottomed holes 33 are formed at equal intervals on a circumference passing through these positions, and are set to be the same in the radial direction and the circumferential direction as the plurality of bottomed holes 31 described above. Further, a U-shaped groove 34 having a U-shaped cross section with a predetermined depth is formed in a ring shape on the lower surface of the flange portion 22B of the rotating body 22 in accordance with the position of the bottomed hole 33 in the radial direction. (See phantom lines in FIG. 5).
[0041]
Thereby, a pair is formed by each bottomed hole 33 and the U-shaped groove 34 opposed thereto, and one second ball 26 is arranged for each pair. As a result, a thrust direction bearing is formed in which a part of the rotating body 22 and the fixed ring 23 is also used as a race part. Therefore, the rotating body 22 and the fixed ring 23 are rotatably connected to each other via a thrust bearing having the plurality of second balls 26 as a central member. Since the fixing ring 23 is fixed on the fixed base box 11, the rotating body 22 is eventually rotatable with the base box 11.
[0042]
In the present embodiment, the bottomed holes 33 formed in the fixing ring 23 are configured to use the upper surface of the base box 11 as a bottom surface. However, the fixing ring 23 itself has a bottomed counterbore. May be formed.
[0043]
Further, holes 35 are drilled at a plurality of positions at equal intervals in the circumferential direction at positions where the inner peripheral surface of the fixing ring 23 is viewed, as shown in FIG. Since the upper surface of the base box 11 is located at the bottom of each hole 35, the hole 35 forms a bottomed hole. In each of the plurality of bottomed holes 35, a part of the wall on the inner peripheral surface side is opened, and abuts on the outer peripheral surface of the cylindrical portion 22A of the rotating body 22. The plurality of third balls (steel balls) 27 described above are inserted into the respective bottomed holes 35.
[0044]
For this reason, a bearing inserted in the radial direction between the fixed ring 23 and the cylindrical portion 22A of the rotating body 22 is formed. As a result, when the rotating body 22 rotates with respect to the fixed ring 23, the radial movement thereof is regulated by the bearing function.
[0045]
As shown in FIG. 6, the driving means 12 includes a DC electric motor 41 as a driving source, and a torque transmitting mechanism 42 for transmitting the torque of the electric motor 41 to the rotating body 22 described above. The rotational force transmission mechanism 42 is provided with a reduction gear mechanism 43 attached to the rotation shaft of the electric motor 41, a worm gear 44 receiving a rotational force reduced to a predetermined number of revolutions by the reduction gear mechanism 43, and meshing with the worm gear 44. And a rotating wheel 45. The number of gear stages of the reduction gear mechanism 43 is arbitrary, and is formed to an appropriate number according to the reduction ratio.
[0046]
A hole 45A having a constant radius is formed at the center of the wheel 45, and the hole 45A faces the outer peripheral surface of the lower end of the cylindrical portion 21A of the support body 21 with a gap of a predetermined margin. Therefore, even if the wheel 45 rotates, the rotation is not directly transmitted to the support 21.
[0047]
Further, as shown in FIG. 2, the wheel 45 has a step 45B at a position on the upper surface facing the hole 45A at the center thereof. The lower end surface of the rotating body 22 described above is screwed to the step 45B. For this reason, when the wheel 45 rotates, the rotational force can be transmitted to the support 21 via the rotating body 22 as it is, and the support 21 also rotates in one of the circumferential directions. That is, since the rotational driving force of the electric motor 41 described above is transmitted to the support 21 via the rotational force transmission mechanism 42, the support 21 can rotate.
[0048]
The electric motor 41 is connected via a lead wire (not shown) to a motor drive circuit (not shown) provided in the television main unit 1A. It is designed to rotate in response to a signal. The motor drive circuit has a communication interface, and receives a button operation signal from the remote controller 1C (see FIG. 1) wirelessly via the communication interface. The remote control 1C is provided with operation buttons for rotating (swiveling) the screen of the television main body 1A in the desired left and right directions, in addition to various buttons related to the screen display of the television main body 1A.
[0049]
Note that the operation device for instructing a desired rotation direction by the user to the motor drive circuit is not necessarily limited to the remote control, but may be provided, for example, in a part of the base box 1B.
[0050]
Further, as shown in FIGS. 2, 3, and 6, a stopper mechanism 14 is provided inside the base box 1B. The stopper mechanism 14 includes a rod-like bar 14A screwed to the lower end surface of the cylindrical portion 21A of the support body 21 and two stopper members 14B suspended from the back surface of the upper plate of the base box 1B. . One end of the bar 14A extends in the radial direction of the rotation mechanism 13 and is formed to have a length that can contact the two stopper members 14B. Therefore, the rotational position of the bar 14A in the circumferential direction corresponds to the rotational position of the support 21, that is, the rotational position of the television body 1A in the left-right direction (the direction of the television screen).
[0051]
As an example, the interval between the two stop members 14B is set to a limit value of ± 30 ° with reference to a bar position corresponding to the front position of the television screen, for example. That is, the rotation angle of the bar 14A, that is, the horizontal direction of the television main body 14A is restricted to an angle range of ± 30 ° as an example by the two stopper members 14B.
[0052]
The stand 1B as the heavy load supporting device according to the present embodiment is configured as described above. Therefore, the user can operate the remote controller 1C to change the left-right direction of the television main unit 1A. Specifically, a motor drive signal corresponding to a desired rotation direction instructed by the user is supplied to the electric motor 41, and the electric motor 41 rotates. This torque is reduced by the reduction gear mechanism 43, and the reduced torque is transmitted to the wheel 45 via the worm gear 44. Therefore, the rotating body 22 rigidly connected to the wheel 45 rotates in the designated circumferential direction.
[0053]
In the thrust direction, the rotating body 22 is supported by a plurality of first balls located on the upper side by 25 and by a plurality of second balls 26 located on the lower side. Further, the rotating body 22 is supported by a plurality of third balls 27 between the rotating body 22 and the fixed ring 23 in the radial direction.
[0054]
For this reason, since the television main body 1A is a heavy object having a predetermined weight as described above, when the television main body 1A is capable of rotating in the left-right direction without hindrance, an appropriate load depending on the weight is generated by a plurality of third loads. It hangs on one ball 25 and a plurality of second balls 26. For this reason, the rotating body 22 and the supporting body 23 above the rotating body 22 are softly connected to each other by an appropriate frictional force due to the appropriate load. On the other hand, since the fixed ring 23 is fixed between the rotating body 22 and the lower fixed ring 23, the rotating body 22 is freely rotated by the fixed ring 23 by the bearing function of the plurality of second balls 26. Can move.
[0055]
Accordingly, when the rotating body 22 rotates in one of the circumferential directions in response to the user's rotation command in the left-right direction in a state where the television body 1A can rotate in the left-right direction without any trouble, the rotational force is generated. Is reliably transmitted to the upper support 23 which is softly connected. That is, the support 23 rotates in the commanded circumferential direction. Since the support 21 is connected to the television main body 1A via the bracket 24, the television main body 1A rotates in the left-right direction, and the direction of the television screen viewed from the user gradually changes to the designated direction (FIG. 1). (See the directions of the arrows A1 and A2.)
[0056]
At this time, the bar 14A of the stopper mechanism 14 gradually rotates in the left or right direction as shown by arrows C1 and C2 in FIG.
[0057]
For this reason, when the user stops the button operation of the remote controller 1C assuming that the television screen is in the desired orientation, the rotation of the electric motor 41 also stops, so that the integral rotation of the rotating body 22 and the supporting body 21 is immediately performed. Stop. Therefore, the user can set the angle of the screen of the plasma television 1 to a desired state.
[0058]
On the other hand, when the user keeps pressing the button of the remote control 1C and instructs the television screen to rotate in one specific direction, the above-described rotation of the rotating body 22 and the support body 21 is also continued. When this rotation reaches, for example, the above-mentioned limit of + 30 ° or −30 °, the bar 14A of the stopper mechanism 14 hits one of the stop members 14B as shown by the imaginary line C1 or C2 in FIG. In such a state, the moving body 21 rigidly connected to the stopper mechanism 14, that is, the television main unit 1A cannot continue to rotate any further due to the stopper function of the stopper mechanism 14.
[0059]
For this reason, the forcible restricting force by the stopper mechanism 14 is superior to the soft coupling force up to that time, so that the rotating body 22 and the supporting body 21 which seemed to be softly integrated by the weight of the television main body 1A so far. Is released. In such a state, slippage occurs between the rotating body 22 and the support 21 via the plurality of first balls 25. Therefore, since the rotation of the support 21, that is, the rotation of the television main body 1 </ b> A is stopped, the rotation of only the rotating body 22 is allowed by such a slip. That is, even when the user keeps pressing the button of the remote controller 1C, only the rotating body 22 rotates idly, and no further rotating force is applied to the television body 1A.
[0060]
As described above, when the user keeps pressing the button of the remote controller 1C, only the rotating body 22 rotates due to the sliding of the upper and lower members (the rotating body 22 and the support body 21) via the plurality of first balls 25. In addition, the television main body 1C can be continuously stopped at a constant angle in the left-right direction. As a result, it is possible to reliably prevent excessive rotation of the television main body 1C beyond the limit value, eliminate the overload of the motor control circuit, and prevent the rotation mechanism 13 from being damaged.
[0061]
When the user instructs the reverse rotation of the television main body 1A on the remote control 1C from this state, there is no forcible force by the stopper mechanism 14, so the weight of the television main body 1C causes the rotation body 22 and the support body 21 to move. The soft connection is restored, and the screen direction of the television main unit 1B can be changed in the direction of the reverse rotation.
[0062]
On the other hand, while the user operates the remote controller 1C to adjust the screen angle of the television body 1A, the user hits an obstacle such as a person or furniture and reaches a predetermined value or more before reaching a predetermined rotation limit angle in the horizontal direction. Is applied. In this case as well, as in the case of the overload avoidance when the limit angle is reached, the obstacle causes the television main unit 1A to be unable to rotate further or to be hard to rotate.
[0063]
For this reason, since the forcible restricting force due to the obstacle is superior to the soft coupling force up to that point, the rotating body 22 and the supporting body that have been apparently integrated so far by the weight of the television main body 1A are soft. 21 is released. In this state, slippage occurs between the rotating body 22 and the support 21 via the plurality of first balls 25. Therefore, even when the user keeps pressing the button of the remote controller 1C, only the rotating body 22 rotates as described above, so that only the rotating body 22 idles, and the television main body 1A no longer rotates. No torque is applied. For this reason, it is possible to prevent people and furniture from falling.
[0064]
As described above, according to the stand 1B as the heavy object support device including the rotation mechanism according to the present embodiment, the television main body 1A is rotated (swiveled) at a constant low speed within a fixed angle range in the left-right direction. And can be adjusted to any angle within that range. On the other hand, when the screen angle of the television main body 1A reaches a limit value in any of the left and right directions, or when the television main body 1A comes into contact with an obstacle during the rotation thereof, the slip between the rotating body 22 and the support body 21 causes slippage. Only the rotating body 22 idles, and an over-rotation state of the support body 21, that is, the television body 1A can be quickly and reliably avoided. As a result, it is possible to prevent damage to components, burnout of an electric circuit of the control system, and the like.
[0065]
Further, according to the present embodiment, the rotating mechanism 13 is provided with a bearing function by the plurality of first, second, and third balls 25, 26, and 27 in both the thrust direction and the radial direction. ing. Thus, the load in the thrust direction can be reliably supported, and the deflection in the radial direction can be reliably restricted, so that the rotation mechanism 13 can be given a reliable and smooth rotation.
[0066]
At this time, since the radial positions of the group of the plurality of first balls 25 and the group of the plurality of second balls 26 are matched, the load applied in the slice direction is reliably supported, and And a stable rotation of the support 21 can be obtained.
[0067]
Further, since the rotating body 22, the supporting body 21, and the fixing ring 22 have a structure that also serves as a race part that supports the first to third balls (steel balls), the entire structure of the rotating mechanism 13 is reduced. Can be made compact.
[0068]
Further, the rotation mechanism 13 can perform a function of stably and smoothly adjusting the TV screen angle and reliably avoiding an overload, but also requires a special expensive member (for example, a limiter for pressure relief). Not used. Therefore, the manufacturing cost can be suppressed as much as possible.
[0069]
(Modification of First Embodiment)
The rotation mechanism 13 according to the first embodiment described above can be further implemented in various modified forms.
[0070]
For example, in the rotating mechanism in the above-described embodiment, the number and positions of a plurality of balls (steel balls) having a bearing function are determined so that the rotating mechanism can be applied to a heavy object (for example, a plasma television) whose weight is known in advance. Have been described. However, as described above, the rotating mechanism including the support, the rotating body, and the fixing ring can increase the versatility and reduce the manufacturing cost as long as it can be applied to various weights of a single heavy unit. That is more convenient.
[0071]
From such a viewpoint, the rotation mechanism may be modified as shown in FIG. FIG. 7 shows a modified example corresponding to FIG. 4 described above, in which a plurality of bottomed holes D1 and a U-shaped hole are provided on the upper surface of the flange 22B of the rotating body 22 and the lower surface of the flange 21B of the support 21. An outer bearing BG1 composed of a groove F1 and a plurality of balls (steel balls) G1, and an inner bearing BG2 composed of a plurality of bottomed holes D2, a U-shaped groove F2, and a plurality of balls (steel balls) G2 were formed. Things. In this case, the outer bearing BG1 has eight balls G1, while the inner bearing BG2 has four balls G2. Similarly, two rows of inner and outer bearings are formed between the rotating body 22 and the fixed ring 23.
[0072]
According to the modification shown in FIG. 7, even with one rotating mechanism, when the weight of a heavy object is heavy, only the outer bearing BG1 is used, and when the weight is light, only the inner bearing BG2 is used. Can be. Further, depending on the weight and size of the heavy object, both the outer bearing BG1 and the inner bearing BG2 can be used, or the number of balls to be put in the outer bearing BG1 can be reduced by half to four. As a result, versatility can be given to one rotating mechanism, and the number of lots can be increased to reduce the manufacturing cost.
[0073]
Further, the bearing means based on the first and second balls 25 and 26 described above may have adjusting means for adjusting the lower limit of the weight at which the sliding occurs. As shown in FIG. 7, at least one of the number, size, material, position, and surface finish of the first and second balls 25 and 26 is adjusted by the adjusting means. Functionality is achieved by adjustment. Thus, even when the weights of the heavy objects are different, the load for recognizing the obstacle by the same rotation mechanism can be adjusted and maintained constant. For example, as the weight of a heavy object increases, the number of balls increases, or the surface finish of the ball is increased to reduce the friction coefficient, so that a heavy object and a light object hit the same obstacle. The recognition load can be adjusted almost the same. As a result, since the recognition load can be easily adjusted only by changing at least one factor of the adjusting means, the versatility of the same rotating mechanism is further enhanced, and the effect of reducing the manufacturing cost due to the increase in the number of lots is enjoyed. Can be.
[0074]
(Second embodiment)
A second embodiment will be described with reference to FIGS.
[0075]
A heavy object supporting device having a rotation mechanism according to this embodiment will also be described as a device applied to a plasma television as a heavy object. In the second embodiment, the same or equivalent components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified.
[0076]
FIG. 7 shows a rotation mechanism 13 according to the second embodiment, which is mounted on a stand 1B of the plasma television 1.
[0077]
As shown in FIGS. 7 and 8, the rotation mechanism 13 includes a support 121, a bearing 124, a rotating body 122, and a fixed ring 123 which are arranged in order from the top in the drawing.
[0078]
The support body 121 is a first flanged cylinder including a cylindrical portion 121A having an outer peripheral surface having a predetermined diameter, and a plate-like flange portion 121B which is integrally expanded at an upper end portion of the cylindrical portion 121A and expands in the lateral direction. I make up my body.
[0079]
Similarly, the bearing body 124 includes a cylindrical portion 124A having an inner and outer peripheral surface having a predetermined diameter, and a plate-shaped flange portion 124B which is integrally expanded at an upper end portion of the cylindrical portion 124A and expands in the lateral direction. It forms a flanged cylinder. As an example, the bearing body 124 is formed of a resin material (for example, a thermoplastic resin) having an appropriate coefficient of friction.
[0080]
The rotating body 122 also includes a cylindrical portion 122A having an inner and outer peripheral surface with a predetermined diameter, and a plate-shaped flange portion 122B which is integrally expanded at an upper end portion of the cylindrical portion 122A and spreads in the lateral direction. It forms a flanged cylinder. Similarly, the fixing ring 123 also includes a cylindrical portion 123A having an inner and outer peripheral surface having a predetermined diameter, and a plate-like flange portion 123B which is integrally expanded at an upper end portion of the cylindrical portion 123A and expands in the lateral direction. The flanged cylindrical body is formed.
[0081]
As shown in FIG. 8, the support 121, the bearing 124, the rotating body 122, and the fixing ring 123 are formed of the fixing ring 123, the rotating body 122, the bearing 124, and the supporting body 121 in this order from the outside in the radial direction. It is arranged by being superposed in order.
[0082]
Among them, the support 121 is fixed to the television main body 1A via the bracket 24, similarly to the first embodiment. Further, the fixing ring 123 is fixed to the base box 11 as a base similarly to the first embodiment. As in the first embodiment, a plurality of bottomed holes 33, U-shaped grooves 34, and thrust-direction bearing means based on a plurality of balls 26 are provided between the fixed ring 123 and the rotating body 122. Has been. Further, the lower end of the cylindrical portion 122B of the rotating body 122 is fixed to the wheel 45 as in the first embodiment.
[0083]
Other configurations are the same as those of the above-described first embodiment.
[0084]
According to the present embodiment, the flange 124B of the bearing 124 is located between the flange 121B of the support 121 and the flange 122B of the rotating body 122, and functions as bearing means for supporting a load in the thrust direction. The cylindrical portion 124A of the bearing body 124 is located between the cylindrical portion 121A of the support body 121 and the cylindrical portion 122A of the rotating body 122, and the peripheral surfaces thereof abut against each other to restrict radial deflection. It is a means.
[0085]
As in the first embodiment, the rotation of the wheel 45 is transmitted to the rotating body 122. Since the rotating body 122 is supported by the fixed ring 123 via the plurality of balls 26, the rotating body 122 can rotate. At this time, the load of the television main body 1A is transmitted to the rotating body 122 via the bracket 24, the support 121, and the bearing 124. Therefore, due to the downward pressing due to this load, the friction of the rotating body 124 with an appropriate friction coefficient is effective, and the rotating body 122, the bearing body 124, and the support body 121 are apparently softly integrated together. Therefore, the rotation of the rotating body 122 is transmitted to the supporting body 121, and the television main body 1A also rotates at a constant low speed in one of the left and right directions (see arrows A1 and A2 in FIG. 1).
[0086]
However, the stopper mechanism 14 may operate, or an external force may be applied to prevent the television main body 1A from rotating beyond a predetermined value (that is, a frictional force generated by the load and the rotating body 124) when the television body 1A hits an obstacle. In such a case, since the support 121 cannot rotate, the soft connection between the rotating body 122, the bearing 124, and the support 121 is broken, and a slip occurs between the rotating body 122 and the bearing 124. I do. That is, as in the case of the first embodiment described above, only idle rotation of the rotating body 122 is allowed while the rotation of the television main body 1A is stopped, so that the user instructs rotation beyond a predetermined limit angle. Even when the television body 1A hits an obstacle during its rotation, it is possible to prevent the rotation mechanism 13, the electric motor 41, and the like from being damaged or burnt, or from falling down on people or furniture. .
[0087]
In this case, by using the resin-made bearing member 124, it is possible to obtain a more excellent effect than in the case of the first embodiment.
[0088]
Compared to the rotation mechanism 13 according to the first embodiment, the second embodiment has two bearing means in the thrust direction (bearing based on the ball 25) and radial bearing means (bearing based on the ball 27). Has a structure in which a resin bearing body 124 configured as a flanged cylindrical body is used. For this reason, since the friction coefficient of the bearing body 124 can be easily set to an appropriate value larger than that of the hard sphere, the rotation caused by the inertia after the electric motor 41 is turned off by instructing the rotation to stop, Excellent braking performance can be obtained. That is, after the rotation stop command, the television main body 1A can be stopped immediately, and the distance traveled by the inertial force after the command can be kept within a very small range.
[0089]
Further, since the friction coefficient can be easily adjusted by changing the type of resin material, the surface shape (such as unevenness), the surface finish, and the like of the bearing body 124, the function as a frictional force adjusting means is also provided. Can demonstrate. Therefore, by utilizing this adjusting means, the rotating mechanism 13 can be widely applied to various weights (various heavy objects), and its versatility can be enhanced.
[0090]
Furthermore, in the rotating mechanism 13, the radial bearing means is also obtained by the cylindrical portion 124A of the bearing body 124 as described above. That is, unlike the first embodiment, a structure in which the steel ball and the circumferential surface of the rotating body are brought into contact with each other is not used, so that a factor of rotation inhibition due to a so-called galling phenomenon is eliminated. Therefore, the rotating body 122 can be rotated more smoothly and more stably.
[0091]
It should be noted that the present invention is not limited to the configurations of the first and second embodiments described above, and it is needless to say that the present invention can be further modified into various forms based on the gist of the claims.
[0092]
As an example, in the embodiment described above, the embodiment in which the heavy object supporting device is applied to a plasma television as a heavy object is described, but the heavy object is not necessarily limited to the plasma television. That is, as described above, the heavy object according to the present invention has a weight that makes it difficult to change the posture by rotating it in the left-right direction by the force of a person in the stationary state, which is a normal use state, and Any device may be used as long as it has at least one of a display unit for providing information to the user and an operation unit for accessing and performing an operation by a person. For example, the same television receiver or a relatively heavy liquid crystal television or CRT television may be used.
[0093]
Further, the heavy object is not limited to the television receiver. As such a heavy object, a personal computer, a CAD device, a console of a medical device, a register, a console of a manufacturing device, a display of a nursing care device, which has a providing means for providing at least one of information and a physical quantity to a person. Or a large speaker.
[0094]
Further, the heavy object may be a washing machine, a refrigerator, a microwave oven, a nursing table, a nursing chair, a car seat, or the like, which has an operation unit operated by a person. Of course, this heavy object may have both the providing means and the operation unit described above.
[0095]
Thus, the above-described various functions and effects can be obtained by implementing the heavy object supporting device provided with the rotating mechanism of the present invention on various heavy objects including the above-described specific examples.
[0096]
【The invention's effect】
As described above, according to the heavy object supporting device having a rotation mechanism according to the present invention, a heavy object such as a plasma television or a home appliance can be freely and stably moved within a predetermined angle range around an axis in the direction of gravity. To rotate it to adjust the angle. Further, even when an overload is applied during the adjustment of the rotation angle, the overload state can be reliably avoided, and it is possible to prevent overturning of peripheral objects and damage / burnout of a mechanism beforehand. Furthermore, since no particularly expensive components are used, a heavy-weight support device having an inexpensive rotating mechanism with reduced component costs can be provided.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a plasma television embodying a heavy object supporting device having a rotation mechanism according to an embodiment of the present invention.
FIG. 2 is a view showing the heavy object supporting device according to the first embodiment of the present invention, and is a cross-sectional view showing a main part of the rotation mechanism when viewed along line II-II in FIG. 3;
FIG. 3 is an exploded perspective view showing an outline of the rotation mechanism shown in FIG. 2;
FIG. 4 is an explanatory view of a main part of the rotation mechanism as viewed along the line IV-IV in FIG.
FIG. 5 is an explanatory view of a main part of the rotation mechanism as viewed along line VV in FIG. 2;
FIG. 6 is an explanatory diagram illustrating a drive mechanism and a stopper mechanism of a rotation mechanism when the inside of a base box is viewed from below.
FIG. 7 is a diagram illustrating a modification of the rotation mechanism.
FIG. 8 is a cross-sectional view illustrating a main part of the rotation mechanism when viewed along the line VIII-VIII in FIG. 9, illustrating the heavy object supporting device according to the second embodiment of the present invention.
FIG. 9 is an exploded perspective view showing the outline of the rotation mechanism shown in FIG. 8;
[Explanation of symbols]
1 Plasma TV
1A TV body (heavy object)
1B Base box (base)
1C Remote control (remote control means)
12 driving means
13 Rotation mechanism
14 Stopper mechanism
21 Support
21A cylindrical part
21B Flange
22 Rotating body
22A cylindrical part
22B Flange
23 Fixing ring
25, 26, 27 balls (steel balls)
31, 33 bottomed hole
32,34 U-shaped groove
35 holes
121 support (first cylindrical body with flange)
121A cylindrical part
121B Flange
122 Rotating body (third flanged cylindrical body)
122A cylindrical part
122B collar
123 retaining ring
123A cylindrical part
123B collar
124 bearing body (second flanged cylindrical body)
124A cylindrical part
124B collar (ring body)

Claims (14)

A heavy object supporting device that supports a heavy object so as to be rotatable around a central axis in the direction of gravity of the heavy object within a certain angle range,
A substrate;
Driving means for generating a rotational driving force required for the turning operation of the heavy object in accordance with an operation signal,
A rotating mechanism for transmitting the rotational driving force from the driving means to the heavy object,
A stopper mechanism for restricting the rotation by the rotation mechanism to the certain angle range,
The rotation mechanism,
A support fixed to the weight,
A fixed body fixed to the base,
A rotating body interposed between the fixed body and the support body and rotatable by a rotational driving force from the driving unit;
Sliding occurs when the weight from the heavy object in the thrust direction applied to the rotating body and interposed between the rotating body and the support and between the rotating body and the fixed body exceeds a predetermined value. And a bearing means for receiving the rotating body in a state where the rotating body is generated and for restricting the swinging movement of the rotating body in the radial direction. The heavy object support device according to claim 1,
The bearing means,
First bearing means interposed between the support and the rotating body and receiving the weight in the thrust direction;
Second bearing means which is rotated between the rotating body and the fixed body and receives the weight in the thrust direction;
A heavy-weight support device provided with a rotation mechanism, comprising: a swing stopper that is rotated between the rotating body and the fixed body and that restricts the swing in the radial direction. The heavy object supporting device according to claim 2,
The first bearing means includes a first elongated groove having a U-shaped cross section and a ring shape formed on a surface of the support opposite to the heavy object, and one of the rotating member on the side of the heavy object. And a plurality of first balls rotatably interposed between the first long groove and the first bottomed hole. ,
The second bearing means includes a second long groove having a U-shaped cross section and a ring shape formed on the other surface of the rotating body on the side opposite to the heavy object, and a side of the fixed body on the heavy object side. And a plurality of second balls rotatably inserted between the second long groove and the second bottomed hole. ,
A third bottomed hole formed in the fixed body and partially having an opening facing the rotating body, and the steadying means is rotatably inserted into the bottomed hole and is formed through the opening; A heavy object supporting device comprising a rotating mechanism, comprising: a plurality of third balls that come into contact with a fixed body. The heavy object support device according to claim 3,
A weight supporting device comprising a rotating mechanism, wherein the first and second long grooves and the first and second bottomed holes have the same radial position in the rotating mechanism. The heavy object support device according to claim 3 or 4,
The driving means includes an electric motor capable of rotating forward and reverse, a worm coupled to a rotating shaft of the electric motor, and a wheel coupled to the worm so as to transmit a rotational force,
The rotating body is composed of a cylindrical portion fixed to the wheel in an upright state on the wheel, and a flange integrally extended in the radial direction from the upper end of the cylindrical portion. A heavy object supporting device comprising a rotating mechanism, wherein an upper surface forms one surface of the rotating body, and a lower surface of the flange forms the other surface of the rotating body. The heavy object supporting device according to claim 2,
The first bearing means is a ring body rotatably inserted between a surface of the support body opposite to the heavy object and one surface of the rotating body on the side of the heavy object. Forming
The second bearing means includes a long groove having a U-shaped cross section and a ring-shaped cross section formed on the other surface of the rotating body opposite to the heavy object, and a surface on the heavy object side of the fixed body. A heavy object supporting device having a rotating mechanism, comprising: a counterbore-shaped bottomed hole formed; and a plurality of balls rotatably inserted between the long groove and the bottomed hole. The heavy object supporting device according to claim 6,
The third bearing means interposes a cylindrical body between the radially inner peripheral surface of the fixed body and the radially outer peripheral surface of the support body in a state in which the cylindrical body is in contact with the both surfaces and is rotatable. A heavy object supporting device comprising a rotating mechanism characterized by being formed by: The heavy object support device according to claim 7,
The support has a structure of a first flanged cylindrical body having a portion having a surface opposite to the heavy object as a flange,
The ring body of the first bearing means and the cylindrical body of the third bearing means form a structure of a second flanged cylinder integrally formed with the ring body as a flange,
The rotating body has a structure of a third flanged cylindrical body having a portion that exhibits the one and other surfaces as a flange portion,
The first, second, and third flanged cylinders are arranged such that the third, second, and first flanged cylinders are superimposed on each other from the outside in the radial direction. A heavy object support device having a rotation mechanism. The heavy object support device according to claim 8,
A heavy object supporting device provided with a rotating mechanism, wherein at least the second flanged cylindrical body is formed of a resin material. The heavy object support device according to any one of claims 1 to 9,
The heavy object support device provided with a rotating mechanism, wherein the bearing means has an adjusting means for adjusting the predetermined value of the weight. The heavy object support device according to any one of claims 1 to 10,
A heavy object support device provided with a rotating mechanism, further comprising remote control means for providing the operation signal to the drive means by remote control. The heavy object support device according to any one of claims 1 to 11,
The heavy object is a television receiver, and the television receiver is a liquid crystal television, a plasma television, or a cathode ray tube television. The heavy object support device according to any one of claims 1 to 11,
The heavy object has a provision means for providing at least one of information and a physical quantity to a person, and includes a personal computer, a CAD device, a console of a medical device, a register, a console of a manufacturing device, and a display device for nursing care. A heavy-weight support device comprising a rotation mechanism. The heavy object support device according to any one of claims 1 to 11,
The rotating mechanism, wherein the heavy object has an operation unit operated by a person, and is one of a refrigerator, a microwave oven, a nursing table, a nursing chair, and a car seat. A heavy object supporting device comprising:

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