Support mechanism for adjusting a display and display device
By designing a gear set with switchable meshing states, the risk of bumps and knocks during monitor rotation and the issue of ease of use were resolved, thereby improving the monitor's safety and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEFEI BOE VIDEO TECH CO LTD
- Filing Date
- 2023-09-28
- Publication Date
- 2026-07-21
AI Technical Summary
Existing monitor stands pose a risk of collision when the monitor is rotated from landscape to portrait mode, and the simultaneous rotation and height adjustment limit the monitor's flexibility and ease of use.
Design a support mechanism that switches between the meshing and decoupling states of the first and second gear sets to enable the display to move synchronously or rotate independently during rotation, avoiding collisions and maintaining flexibility.
It effectively avoids bumps and knocks during monitor rotation, improving the safety and flexibility of monitor use and providing a more convenient operating experience.
Smart Images

Figure CN117231865B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of display device technology, and in particular relates to a support mechanism and display device for adjusting a display. Background Technology
[0002] With the development of monitor stand technology, monitor stands now have the function of rotating the monitor, allowing for portrait viewing. However, there is a risk of collision with the desktop during the rotation from landscape to portrait mode. In order to reduce the risk of collision, some monitor stands synchronize rotation and height adjustment, which restricts the range of motion of the monitor and reduces its flexibility of use. Summary of the Invention
[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a support mechanism and display device for adjusting a display, reducing the probability of the display being bumped or knocked during rotation, and allowing the display to rotate and move independently.
[0004] In a first aspect, this application provides a support mechanism for adjusting a display, comprising:
[0005] A first gear set, which is used to be fixedly connected to the display;
[0006] The second gear set can switch between a meshing state and a decoupled state with the first gear set;
[0007] A connecting bracket is provided, on which both the first gear set and the second gear set are rotatably mounted;
[0008] The mounting bracket is provided with a rack for meshing with the second gear set, and the connecting bracket and the mounting bracket are slidably engaged along the extension direction of the rack.
[0009] According to the support mechanism of this application, by setting the first gear set and the second gear set to switch between an engaged state and a decoupled state, the display can move upward synchronously during the rotation from landscape to portrait mode to prevent collision. When there is no risk of collision, the display can rotate and move independently, making the display movement more flexible and easier to use.
[0010] According to one embodiment of this application, the support mechanism has a compound motion mode in which the second gear set is meshed with the first gear set, the rack is meshed with the second gear set, the rotating first gear set drives the second gear set to rotate, and drives the first gear set, the second gear set and the connecting bracket to move along the rack.
[0011] According to one embodiment of this application, the support mechanism has a rotation mode in which the second gear set is decoupled from the first gear set, and the first gear set rotates.
[0012] According to one embodiment of this application, the support mechanism has a first movement mode in which the first gear set and the second gear set are decoupled, the first gear set moves along the mounting bracket, and the first gear set, the connecting bracket, and the second gear set move along the extension direction of the rack.
[0013] According to one embodiment of this application, the first gear set includes:
[0014] The first gear, the first axle of the first gear being used for fixed connection with the display;
[0015] A second gear, which meshes with the first gear;
[0016] The third gear is connected to the second gear via a second wheel shaft, and the third gear and the second gear set can switch between a meshing state and a decoupled state.
[0017] According to one embodiment of this application, the connecting bracket is provided with a shaft hole, and the second wheel shaft is movably disposed between a first position and a second position in the shaft hole. When the second wheel shaft moves between the first position and the second position, the third gear and the second gear set switch between a meshing state and a decoupled state.
[0018] According to one embodiment of this application, the shaft hole is arc-shaped, with its center located on the axis of the first gear axle. The second gear axle passes through the shaft hole, and the axis of the first gear axle is spaced apart from the axis of the second gear set. When the second gear axle moves between the first position and the second position, the second gear remains engaged with the first gear.
[0019] According to one embodiment of this application, the support mechanism has a compound motion mode in which the second axle is located at the first position, the third gear is meshed with the second gear set, and the second gear set is meshed with the rack.
[0020] According to one embodiment of this application, the support mechanism has a rotation mode in which the rotating first gear drives the second gear to rotate and drives the second axle to move to the second position, so that the third gear is decoupled from the second gear set.
[0021] According to one embodiment of this application, the support mechanism has a first movement mode in which the first axle is locked in the rotation direction, the first axle moving in the rack direction drives the connecting bracket and the second gear set to move in the extension direction of the rack, and the rotating second gear set drives the third gear to move the second axle to a second position so that the third gear is decoupled from the second gear set.
[0022] According to one embodiment of this application, the second axle is axially movably mounted on the connecting bracket so that the second gear and the first gear can switch between an engaged state and a decoupled state.
[0023] According to one embodiment of this application, the support mechanism for adjusting the display further includes: a sliding pad and a first elastic member, the sliding pad being sleeved outside the second axle and abutting against the connecting bracket, the end face of the second axle being provided with a flange, and the first elastic member being elastically connected between the flange and the sliding pad.
[0024] According to one embodiment of this application, the second gear set includes:
[0025] The fourth gear meshes with the third gear. Both the fourth gear and the third gear are helical gears, and the thickness of the fourth gear in the direction of the pivot axis is greater than the thickness of the third gear.
[0026] The fifth gear is connected to the fourth gear via a third axle, which is pivotally mounted on the connecting bracket, and the fifth gear meshes with the rack.
[0027] The support mechanism has a second movement mode. In the second movement mode, the first wheel axle is locked in the rotation direction. The first wheel axle, which moves in the rack direction, drives the connecting bracket and the second gear set to move in the extension direction of the rack. The rotating fourth gear drives the third gear to make the second wheel axle move axially, so as to decouple the second gear from the first gear.
[0028] According to one embodiment of this application, the support mechanism for adjusting the display further includes:
[0029] A guide assembly is mounted on the mounting bracket and arranged along the extension direction of the rack, and the connecting bracket is movably mounted on the guide assembly.
[0030] According to one embodiment of this application, the support mechanism for adjusting the display further includes:
[0031] A second elastic element is mounted on the mounting bracket, and one end of the second elastic element is connected to the connecting bracket, applying an upward elastic force to the connecting bracket.
[0032] Secondly, this application provides a display device, characterized in that it comprises:
[0033] monitor;
[0034] As described in any of the above embodiments, the display is fixedly connected to the first gear set.
[0035] According to the display device of this application, by setting a support mechanism and enabling the first gear set and the second gear set of the support mechanism to switch between an engaged state and a decoupled state, the display can move upward synchronously during the rotation from a horizontal screen to a vertical screen to prevent collision. When there is no risk of collision, the display can also rotate and move independently, making the display movement more flexible and easier to use.
[0036] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0037] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0038] Figure 1 This is one of the partial structural schematic diagrams of the support mechanism provided in the embodiments of this application;
[0039] Figure 2 This is a second partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0040] Figure 3 This is the third partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0041] Figure 4 This is the fourth partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0042] Figure 5 This is the fifth partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0043] Figure 6 This is the sixth partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0044] Figure 7 This is the seventh partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0045] Figure 8 This is the eighth partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0046] Figure 9 This is the ninth partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0047] Figure 10 This is the tenth partial structural schematic diagram of the support mechanism provided in the embodiments of this application;
[0048] Figure 11 This is eleventh of the partial structural schematic diagrams of the support mechanism provided in the embodiments of this application;
[0049] Figure 12 This is one of the structural schematic diagrams of the display device provided in the embodiments of this application.
[0050] Figure label:
[0051] Display device 100;
[0052] Monitor 200;
[0053] Support mechanism 300, mounting bracket 301, connecting bracket 302, connecting part 303, shaft hole 304, sliding part 305, rack 306, guide assembly 307, second elastic element 308;
[0054] First gear set 310, first gear 311, first wheel shaft 312, second gear 314, third gear 315, second wheel shaft 316, flange 317;
[0055] Second gear set 320, fourth gear 321, fifth gear 322, third gear axle 323;
[0056] Sliding pad 330, first elastic element 340. Detailed Implementation
[0057] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0058] With the development of video and software, as well as the application of vertical screen players such as mobile phones, most monitors can now support vertical screen playback, facilitating the viewing of vertical videos or the playing of vertical games. To further enhance user convenience, the monitor's support mechanism has also evolved to allow for screen rotation. Based on research into human perception and advancements in display technology, monitors are generally rectangular in shape with a specific aspect ratio. Under normal use, the long side of the monitor is horizontal, and the monitor is in landscape mode. To switch to portrait mode, the monitor must be rotated so that the long side is vertical.
[0059] However, in actual use, monitors are generally placed on a desktop. When the monitor is rotated from landscape to portrait mode, because the long side of the monitor is relatively long, the maximum rotation radius of the monitor is the line connecting the center of the monitor to the top corner. The maximum rotation radius of the monitor can easily interfere with the desktop, causing the corners of the monitor to bump against the desktop, which may seriously damage the monitor.
[0060] Therefore, some monitor support mechanisms couple the monitor's rotation and height adjustment synchronously based on its rotation trajectory. This allows the monitor to move in sync with the user's movements; for example, rotating the monitor from landscape to portrait mode causes it to move upwards, and rotating it from portrait to landscape causes it to move downwards. This method solves the problem of the monitor bumping against the desktop, but it sacrifices the ability for the monitor to rotate and move independently.
[0061] To address the risk of desktop collisions during monitor rotation from landscape to portrait mode, and the technical problem of limited monitor movement and flexibility due to synchronized rotation and movement, this application provides a support mechanism for adjusting a monitor. This support mechanism includes a first gear set, a second gear set, a connecting bracket, and a mounting bracket. The first gear set is configured for fixed connection to the monitor; the second gear set can switch between an engaged state and a decoupled state with the first gear set; both the first and second gear sets are rotatably mounted on the connecting bracket; the mounting bracket has a rack for meshing with the second gear set, and the connecting bracket and the mounting bracket slide along the extension direction of the rack.
[0062] In this support structure, the mounting bracket plays the main supporting role, and the connecting bracket is used to connect the first gear set, the second gear set, and the mounting bracket. The monitor is fixedly connected to the first gear set, and the second gear set meshes with the rack fixedly set on the mounting bracket. The first gear set and the second gear set can switch between an engaged state and a decoupled state. When the first gear set and the second gear set are engaged, the monitor can move synchronously to prevent collisions when rotating from a horizontal screen to a vertical screen. When there is no risk of collision, the first gear set and the second gear set are decoupled, and the monitor can rotate and move independently. The monitor movement is more flexible and the use is more convenient.
[0063] The following is for reference. Figures 1 to 12 This application describes a support mechanism 300 for adjusting a display 200 according to an embodiment of the present application. The support mechanism 300 may include a first gear set 310, a second gear set 320, a connecting bracket 302, and a mounting bracket 301.
[0064] The mounting bracket 301 serves as the main load-bearing component, supporting the display 200 and the gear set. The mounting bracket 301 can extend vertically. A rack 306 may be provided on the mounting bracket 301, extending vertically and fixedly connected to the mounting bracket 301.
[0065] The connecting bracket 302 is mounted on the mounting bracket 301 and slides with the mounting bracket 301 along the extension direction of the rack 306, so that the connecting bracket 302 can be slidably set along the extension direction of the rack 306, that is, the connecting bracket 302 can be slidably set vertically. The connecting bracket 302 is used to connect the first gear set 310 and the second gear set 320, and connect the first gear set 310 and the second gear set 320 to the mounting bracket 301, so that the first gear set 310 and the second gear set 320 can be synchronously set vertically.
[0066] The first gear set 310 is rotatably mounted on the connecting bracket 302. The first gear set 310 can be used to fixally connect to the display 200, so that the display 200 can rotate and move synchronously with the first gear set 310. In this embodiment, the first gear set 310 can be connected to a rotating shaft. One end of the rotating shaft is connected to the first gear set 310, and the other end of the rotating shaft is connected to the display 200. To facilitate control of the rotation of the display 200, the other end of the rotating shaft can be connected to the geometric center of the display 200.
[0067] The second gear set 320 is rotatably mounted on the connecting bracket 302. The rack 306 is used to mesh with the second gear set 320. When the second gear set 320 meshes with the rack 306 and rotates, the second gear set 320 can drive the connecting bracket 302 and the first gear set 310 to undergo relative displacement with the rack 306. When the connecting bracket 302 and the rack 306 undergo relative displacement, the second gear set 320 will rotate accordingly.
[0068] The first gear set 310 and the second gear set 320 can switch between an engaged state and a decoupled state. When the first gear set 310 and the second gear set 320 are in an engaged state, the first gear set 310 and the second gear set 320 rotate synchronously. When the first gear set 310 and the second gear set 320 are in a decoupled state, the first gear set 310 and the second gear set 320 can rotate separately.
[0069] In actual operation, by switching between the meshing state and the decoupled state of the first gear set 310 and the second gear set 320, when the rotation of the display 200 would cause collision interference, the first gear set 310 and the second gear set 320 are in the meshing state, and the rotation and movement of the display 200 are synchronized to avoid collision positions; when there is no collision interference, the first gear set 310 and the second gear set 320 can be switched to the decoupled state, and the first gear set 310 can rotate independently, so that the display 200 can rotate independently. Moreover, when the connecting bracket 302 drives the first gear set 310 and the second gear set 320 to move, the first gear set 310 can also remain stationary.
[0070] It should be noted that the display 200 can be rotated either by the user manually holding it or by a drive motor driving the rotating shaft. The display 200 can also be moved either by the user manually holding it or by a linear drive mechanism such as a linear motor or a lead screw and slider mechanism, which drives the rotating shaft or the connecting bracket 302 to move the display 200. In the following embodiments, the manual control of the rotation and movement of the display 200 will be used as an example for explanation.
[0071] According to the support mechanism 300 for adjusting the display 200 provided in the embodiments of this application, by setting the first gear set 310 and the second gear set 320 to switch between an engaged state and a decoupled state, the display 200 can move upward synchronously during the rotation from a horizontal screen to a vertical screen to prevent collision. When there is no risk of collision, the display 200 can also rotate and move independently, making the movement of the display 200 more flexible and the use more convenient.
[0072] The support mechanism 300 of this application embodiment has multiple motion modes: mode one to mode three.
[0073] Mode 1: Compound Exercise Mode.
[0074] According to some embodiments of this application, reference is made to Figure 3 and Figure 4 The support mechanism 300 can have a compound motion mode. In the compound motion mode, the second gear set 320 is meshed with the first gear set 310, and the rack 306 is meshed with the second gear set 320. The rotating first gear set 310 drives the second gear set 320 to rotate, and drives the first gear set 310, the second gear set 320 and the connecting bracket 302 to move along the rack 306.
[0075] The support mechanism 300 can have a composite motion mode, in which the rotation and movement of the display 200 are synchronized; that is, in this mode, the display 200 will move synchronously when it is rotated. The support mechanism 300 can be in composite motion mode when rotating the display 200 from landscape to portrait mode, and when there is a risk of collision or interference during the rotation.
[0076] In the compound motion mode, the second gear set 320 is meshed with the first gear set 310. When the display 200 is rotated from landscape to portrait mode, the first gear set 310 rotates synchronously with the display 200. The rotating first gear set 310 drives the second gear set 320 to rotate. The second gear set 320 is meshed with the rack 306. The rack 306 applies an upward driving force to the second gear set 320, thereby driving the first gear set 310, the second gear set 320 and the connecting bracket 302 to move upward along the rack 306, thereby avoiding interference positions and reducing the collision risk of the display 200.
[0077] Mode 2: Rotation Mode.
[0078] According to some embodiments of this application, reference is made to Figures 3 to 6 The support mechanism 300 can have a rotation mode. In the rotation mode, the second gear set 320 and the first gear set 310 are decoupled, and the first gear set 310 rotates.
[0079] The support mechanism 300 can have a rotation mode, in which the monitor 200 can rotate independently. Specifically, when rotating the monitor 200 from portrait to landscape mode, since the monitor 200 occupies more height in portrait mode than in landscape mode, there is generally no risk of bumping or knocking, and the support mechanism 300 can be in rotation mode.
[0080] In rotation mode, the second gear set 320 and the first gear set 310 are decoupled. The rotation of the first gear set 310 will not drive the rotation of the second gear set 320. Therefore, when rotating the display 200, only the first gear set 310 rotates synchronously. Without applying a vertical force to the display 200, the display 200 will not move vertically, making the position control of the display 200 more flexible.
[0081] Mode 3, First Movement Mode.
[0082] According to some embodiments of this application, reference is made to Figure 7 The support mechanism 300 may have a first movement mode. In the first movement mode, the first gear set 310 and the second gear set 320 are in a decoupled state. The first gear set 310 moves along the mounting bracket 301, and the first gear set 310, the connecting bracket 302, and the second gear set 320 move along the extension direction of the rack 306.
[0083] The support mechanism 300 can have a first movement mode in which the display 200 can move independently. Provided there is no risk of interference with other parts of the display 200, the display 200 can move independently in either landscape or portrait mode. It should be noted that in the first movement mode of this embodiment, the display 200 can move upwards independently.
[0084] In the first movement mode, the first gear set 310 and the second gear set 320 are decoupled. When the user drags the display 200, it can drive the first gear set 310 to move along the mounting bracket 301, thereby driving the connecting bracket 302 to move along the mounting bracket 301. The mounting bracket 301 drives the second gear set 320 to move, thereby driving the connecting bracket 302 and the second gear set 320 to move along the extension direction of the rack 306. During the movement, the second gear set 320 rotates due to meshing with the rack 306, but because the first gear set 310 and the second gear set 320 are decoupled, it has no effect on the first gear set 310, allowing the display 200 to move independently and making the operation of the display 200 more flexible.
[0085] In some embodiments, refer to Figures 1 to 8 Please refer to, in particular Figure 8 The rack 306 is located at the lower section of the active stroke of the connecting bracket 302.
[0086] It should be noted that the mounting bracket 301 generally has a certain height to allow the monitor 200 to move in the vertical direction. When the monitor 200 is at a certain height, even if the height of the monitor 200 remains unchanged, rotating the monitor 200 from landscape to portrait mode will not pose a risk of damage. In this case, the rotation and movement of the monitor 200 do not need to be synchronized.
[0087] By placing the rack 306 at the lower end of the travel of the connecting bracket 302, when the display 200 moves to a certain height, the position of the second gear set 320 is higher than the rack 306 to decouple it from the rack 306. At this time, regardless of whether the first gear set 310 and the second gear set 320 are in a meshing state or a decoupled state, the display 200 can rotate or move freely, making the operation of the display 200 more flexible.
[0088] According to some embodiments of this application, reference is made to Figure 1 and Figure 2 The first gear set 310 may include a first gear 311, a second gear 314 and a third gear 315.
[0089] The first gear 311's first shaft 312 is used to fix it to the display 200. The second gear 314 can be used to mesh with the first gear 311. The third gear 315 can be connected to the second gear 314 through the second shaft 316, and the third gear 315 can switch between meshing and decoupling states with the second gear set 320.
[0090] In this embodiment, the first gear 311 is rotatably mounted on the connecting bracket 302 via a first axle 312. One end of the first axle 312 is rotatably connected to the connecting bracket 302, and the other end, a rotating shaft, is connected to the other end of the first axle 312. The second gear 314 can be connected to the third gear 315 via a second axle 316, and the second gear 314, the third gear 315, and the second axle 316 are arranged coaxially, so that the second gear 314 and the third gear 315 rotate synchronously. The second gear 314 can mesh with the first gear 311, and the third gear 315 can switch between a meshing state and a decoupled state with the second gear set 320. When the third gear 315 is meshed with the second gear set 320, the first gear set 310 and the second gear set 320 are in a meshing state; when the third gear 315 is disengaged from the second gear set 320, the first gear set 310 and the second gear set 320 are in a decoupled state.
[0091] According to the embodiments of this application, the first gear set 310, by setting the first gear 311, the second gear 314 and the third gear 315, facilitates the transmission of torque and the matching design of the number of teeth and the rotational speed, as well as facilitates the change of the meshing and decoupling state between the first gear set 310 and the second gear set 320.
[0092] According to some embodiments of this application, reference is made to Figure 1 , Figure 3 and Figure 5 The connecting bracket may be provided with a shaft hole, and the second wheel shaft is movably set between the first position and the second position of the shaft hole. When the second wheel shaft moves between the first position and the second position, the third gear and the second gear set can switch between a meshing state and a decoupled state.
[0093] In this embodiment, the connecting bracket 302 may be provided with a shaft hole 304, wherein the shaft hole 304 penetrates the connecting bracket 302 and extends a certain distance in the circumference of the connecting bracket 302, so that the second wheel shaft 316 can be movably disposed in the shaft hole.
[0094] With the two ends of the shaft hole 304 designated as the first and second positions, when the second gear shaft 316 moves to the first position, the rotation axes of the first gear shaft 312, the second gear shaft 316, and the second gear set 320 are coplanar, and the first gear set 310 and the second gear set 320 are in a meshing state. When the second gear shaft 316 moves to the second position, the third gear 315 gradually disengages from the second gear set 320, causing the first gear set 310 and the second gear set 320 to become decoupled. Furthermore, in one example, as the second gear shaft 316 moves to the second position, the second gear 314 also decouples from the first gear 311, thereby completely decoupling the first gear from the second gear set.
[0095] In actual operation, the user can manually move the second wheel shaft 316 between the first and second positions. When the second wheel shaft 316 moves to the second position, the first gear 311 is decoupled from the second gear set 320, the movement of the display is unrestricted, and the control is flexible.
[0096] According to the embodiments of this application, by providing a shaft hole 304 on the connecting bracket 302, the second gear shaft 316 is movably disposed along the shaft hole 304, realizing the conversion between the first gear 311 and the second gear set 320 in the meshing state and the decoupling state. The structure is simple and easy to process, and makes the operation of the display 200 more flexible and convenient for user adjustment.
[0097] According to some embodiments of this application, reference is made to Figure 1 , Figure 3 and Figure 5The shaft hole 304 can be arc-shaped, and the center of the shaft hole 304 can be located on the axis of the first gear shaft 312. The second gear shaft 316 can pass through the shaft hole 304. The axis of the first gear shaft 312 can be spaced apart from the axis of the second gear set 320. The second gear shaft 316 can be movably set between the first position and the second position of the shaft hole 304. When the second gear shaft 316 moves between the first position and the second position, the second gear 314 and the first gear 311 remain in a meshing state.
[0098] The connecting bracket 302 may be provided with an arc-shaped shaft hole 304. The second wheel shaft 316 may be provided through the shaft hole 304 and rotatably installed in the shaft hole 304. The second wheel shaft 316 may be moved along the arc-shaped shaft hole 304 in the shaft hole 304, because the center of the arc is located on the axis of the first wheel shaft 312, so that the second wheel shaft 316 can move to any position in the shaft hole 304, and the second gear 314 can be kept in a meshing state with the first gear 311.
[0099] In this embodiment, the two ends of the arc of the shaft hole 304 are designated as the first position and the second position. The second gear shaft 316 can be movably disposed between the first and second positions of the shaft hole 304. When the second gear shaft 316 is moved to the first position, the rotation axes of the first gear shaft 312, the second gear shaft 316, and the second gear set 320 are coplanar, and the first gear set 310 and the second gear set 320 are in a meshing state. Since the axis of the first gear shaft 312 is spaced apart from the rotation axis of the second gear set 320, during the movement of the second gear shaft 316 from the first position to the second position, the second gear 314 remains meshed with the first gear 311, while the third gear 315 gradually disengages from the second gear set 320, causing the first gear set 310 and the second gear set 320 to become decoupled.
[0100] In actual operation, because the second gear 314 remains in mesh with the first gear 311, the second gear shaft 316 can be driven to move between the first and second positions by rotating the first gear 311, thereby achieving the switching between the third gear 315 and the second gear set 320 in meshing and decoupling states, making control simpler.
[0101] According to the embodiments of this application, by providing a shaft hole 304 on the connecting bracket 302, the second gear shaft 316 is movably arranged along an arc, realizing the conversion between the first gear set 310 and the second gear set 320 in the meshing state and the decoupling state. The structure is simple and easy to process, and makes the operation of the display 200 more flexible and convenient for user adjustment.
[0102] With the support mechanism 300 having the first gear set 310 and connecting bracket 302 as described above, the support mechanism 300 has multiple motion modes: Mode 1 to Mode 4. To facilitate explanation of the support mechanism 300 in this application embodiment, the multiple motion modes of the support mechanism 300 will be described below based on the structural design of the first gear set 310 and connecting bracket 302.
[0103] It should be noted that the rotation direction of the gear can be set in various ways. For ease of explanation of the motion state, refer to... Figures 3 to 7 In subsequent embodiments, the rack 306 is positioned on the left side of the second gear set 320, and the first gear shaft 312 needs to be rotated counterclockwise to rotate the display 200 from a horizontal screen to a vertical screen. The shaft hole 304 extends to the left from the line connecting the rotation center of the first gear shaft 312 and the second gear set 320.
[0104] It is understood that under different configurations, such as when the rack 306 is located on the right side of the second gear set 320, the extension direction of the first gear shaft 312 and the shaft hole 304 will be adjusted accordingly. The above description should not be used as a basis for limiting the scope of protection of this application.
[0105] Mode 1: Compound Exercise Mode.
[0106] According to some embodiments of this application, references are made to 2 to 3 Figure 4 The support mechanism 300 can have a compound motion mode. In the compound motion mode, the second wheel axle 316 can be located in the first position, the third gear 315 can be meshed with the second gear set 320, and the second gear set 320 is meshed with the rack 306.
[0107] In the composite motion mode, the initial state of the display 200 is landscape mode, and the second gear shaft 316 is in the first position. At this time, the third gear 315 is engaged with the second gear set 320. When the user rotates the display 200 from landscape to portrait mode, the first gear shaft 312 rotates counterclockwise, driving the first gear 311 to rotate counterclockwise. The rotating first gear 311 drives the second gear 314 to rotate clockwise. The second gear 314 transmits torque to the third gear 315 through the second gear shaft 316. The clockwise rotation of the third gear 315 drives the second gear set 320 to rotate counterclockwise. The counterclockwise rotating second gear set 320 climbs upward along the extension direction of the rack 306, thereby driving the connecting bracket 302 to move upward, thus realizing the driving of the first gear set 310, the second gear set 320 and the connecting bracket 302 to move upward along the rack 306. During the process of rotating the monitor 200 from landscape to portrait mode, the monitor 200 moves upward simultaneously to avoid collisions with obstacles, thereby improving the safety and durability of the monitor 200.
[0108] Mode 2: Rotation Mode.
[0109] According to some embodiments of this application, reference is made to Figures 2 to 6 Especially Figures 3 to 6 The support mechanism 300 has a rotation mode. In the rotation mode, the rotating first gear 311 drives the second gear 314 to rotate and drives the second wheel shaft 316 to move to the second position so that the third gear 315 is decoupled from the second gear set 320.
[0110] In rotation mode, the initial state of the monitor 200 is portrait mode, refer to... Figure 3 and Figure 4 At this time, the second gear shaft 316 is located in the first position of the shaft hole 304. When the user rotates the monitor 200 from portrait to landscape mode, the first gear shaft 312 rotates clockwise, driving the first gear 311 to rotate clockwise. The clockwise rotation of the first gear 311 drives the second gear 314 to rotate, while simultaneously applying a leftward driving force to the second gear 314. (Refer to...) Figure 5 and Figure 6 This causes the second gear 314 to rotate counterclockwise, simultaneously driving the second gear shaft 316 to move along the shaft hole 304 to the second position. This decouples and separates the third gear 315 from the second gear set 320, leaving the second gear set 320 stationary. This prevents the monitor 200 from shifting vertically during the user's transition from portrait to landscape mode, making operation more flexible.
[0111] Mode 3, First Movement Mode.
[0112] According to some embodiments of this application, reference is made to Figures 2 to 4 and Figure 7 The support mechanism 300 has a first movement mode. In the first movement mode, the first wheel shaft 312 is locked in the rotation direction. The first wheel shaft 312, which moves in the direction of the rack 306, drives the connecting bracket 302 and the second gear set 320 to move in the extension direction of the rack 306. The rotating second gear set 320 drives the third gear 315 to move the second wheel shaft 316 to the second position so that the third gear 315 is decoupled from the second gear set 320.
[0113] In the first mobile mode, the initial state of the display 200 can be either portrait or landscape mode, as shown in the reference. Figure 3 and Figure 4 At this time, the second wheel shaft 316 is located in the first position of the shaft hole 304. When the user moves the display 200 upwards alone, the user can lock the display 200 in the rotation direction by hand so that the first wheel shaft 312 is locked in the rotation direction and the first wheel shaft 312 cannot rotate.
[0114] When the first axle 312 moves upward, it drives the connecting bracket 302 and the second gear set 320 to move upward together along the extension direction of the rack 306. Because the rack 306 meshes with the second gear set 320, the second gear set 320 rotates counterclockwise. This counterclockwise rotation of the second gear set 320 drives the third gear 315 to rotate clockwise, while simultaneously applying a leftward driving force to the third gear 315. (Refer to...) Figure 7 This causes the second gear 314 to rotate counterclockwise, simultaneously driving the second gear shaft 316 to move along the shaft hole 304 to the second position. This decouples and separates the third gear 315 from the second gear set 320. After the third gear 315 separates from the second gear set 320, the second gear shaft 316 stops rotating, thus stopping the second gear 314's rotation and preventing any impact on the first gear 311. This allows for independent movement of the display 200 without rotation, making operation more flexible and easier.
[0115] Mode 4, Second Movement Mode.
[0116] According to some embodiments of this application, reference is made to Figure 10 and Figure 11 The second gear shaft 316 can be axially mounted on the connecting bracket 302 so that the second gear 314 and the first gear 311 can switch between a meshing state and a decoupled state.
[0117] The second gear shaft 316 can be axially mounted on the connecting bracket 302. In this embodiment, the first gear 311 and the second gear 314 are both spur gears. Therefore, the first gear 311 and the second gear 314 both have a certain thickness. When the second gear shaft 316 is in the initial position, the first gear 311 and the second gear 314 can be in a meshing position. After the second gear shaft 316 moves to a certain position along its axial direction, the second gear 314 and the first gear 311 are displaced and decoupled, so that the second gear 314 and the first gear 311 can be selectively meshed.
[0118] In actual operation, the user can choose to manually press to drive the second gear shaft 316 to move axially, so that the second gear 314 and the first gear 311 switch between meshing and decoupling states. When the second gear 314 is decoupled from the first gear 311, the coupling relationship between the first gear 311 and the second gear set 320 is also released. In the second movement mode, the display 200 can move downwards independently.
[0119] According to the embodiments of this application, the second wheel shaft 316 is axially movable, making the control of the display 200 more flexible. When the second gear set 320 is engaged with the rack 306 and the third gear 315 respectively, the display 200 can move downwards independently for easy adjustment.
[0120] According to some embodiments of this application, reference is made to Figure 1 , Figure 10 and Figure 11 The support mechanism 300 may also include a sliding pad 330 and a first elastic member 340. The sliding pad 330 may be sleeved on the outside of the second wheel axle 316 and abut against the connecting bracket 302. The end face of the second wheel axle 316 may be provided with a flange 317. The first elastic member 340 may be elastically connected between the flange 317 and the sliding pad 330.
[0121] The end face of the second wheel shaft 316 may be provided with a flange 317. The flange 317 extends outward along the circumference of the second wheel shaft 316, and the flange 317 and the second gear 314 are respectively provided on both sides of the connecting bracket 302. The first elastic member 340 can be elastically connected between the flange 317 and the connecting bracket 302 to apply an elastic force to the flange 317 in a direction away from the connecting bracket 302, so that the second wheel shaft 316 can be reset to the initial state. In the initial state, the second gear 314 meshes with the first gear 311. By driving the second wheel shaft 316 to move axially, the flange 317 moves in a direction close to the connecting bracket 302, so that the first elastic member 340 is in a compressed state. At this time, the second gear 314 and the first gear 311 are decoupled.
[0122] In this embodiment, a sliding washer 330 may be fitted over the second wheel axle 316. The sliding washer 330 can be fitted over the second wheel axle 316 and abut against the surface of the connecting bracket 302. It is understood that the sliding washer 330 and the flange 317 are located on the same side of the connecting bracket 302. The first elastic member 340 can be elastically connected between the flange 317 and the sliding washer 330. By utilizing the characteristics of the sliding washer 330, the second wheel axle 316 can move axially and laterally at the same time.
[0123] The first elastic element 340 can be a spring, an elastic rubber ring, an elastic washer, etc., and there are no restrictions on the specific components. The sliding washer 330 can be made of a wear-resistant plastic material, such as nylon, polytetrafluoroethylene, polyetheretherketone, etc., and there are no restrictions on the specific components.
[0124] In actual operation, when it is necessary to control the display 200 to move downwards independently, the second wheel shaft 316 can be driven to move axially to overcome the elastic resistance of the first elastic element 340, thereby decoupling the second gear 314 from the first gear 311. After the movement stops, the second wheel shaft 316 can automatically reset under the action of the first elastic element 340, thus protecting the display 200.
[0125] According to the first elastic element 340 and sliding pad 330 provided in the embodiments of this application, the second wheel shaft 316, the second gear 314 and the third gear 315 can be automatically reset, which facilitates operation and improves safety.
[0126] According to some embodiments of this application, reference is made to Figures 9 to 11 The second gear set 320 may include a fourth gear 321 and a fifth gear 322.
[0127] The fourth gear 321 can mesh with the third gear 315. Both the fourth gear 321 and the third gear 315 can be helical gears, and the thickness of the fourth gear 321 in the direction of the pivot axis is greater than the thickness of the third gear 315. The fifth gear 322 can be connected to the fourth gear 321 through the third wheel shaft 323. The third wheel shaft 323 can be pivotally mounted on the connecting bracket 302. The fifth gear 322 meshes with the rack 306.
[0128] In this embodiment, the second gear set 320 may include a fourth gear 321 and a fifth gear 322. The fourth gear 321 and the fifth gear 322 can be connected via a third axle 323 and are rotatably connected to the connecting bracket 302 via the third axle 323. The third gear 315 meshes with the fourth gear 321, and both the third gear 315 and the fourth gear 321 are helical gears. When the fourth gear 321 rotates, it applies an axial force to the third gear 315. Furthermore, the thickness of the fourth gear 321 in the pivot axis direction is greater than the thickness of the third gear 315, so that even after the third gear 315 undergoes axial displacement, it can still maintain a meshing state with the fourth gear 321. The fifth gear 322 can mesh with the rack 306.
[0129] It should be noted that the teeth of the fourth gear 321 are inclined in a clockwise direction from the end near the connecting bracket 302 to the end away from the connecting bracket 302. The inclination direction of the teeth of the third gear 315 is opposite to that of the fourth gear 321, so that when the fourth gear 321 rotates clockwise, a force can be applied to the third gear 315 in a direction away from the connecting bracket 302.
[0130] The support mechanism 300 may have a second movement mode in which the first wheel shaft 312 is locked in the direction of rotation. The first wheel shaft 312, which moves in the direction of the rack 306, drives the connecting bracket 302 and the second gear set 320 to move in the extension direction of the rack 306. The rotating fourth gear 321 drives the third gear 315 to make the second wheel shaft 316 move axially, so that the second gear 314 is decoupled from the first gear 311.
[0131] In the second mobile mode, the initial state of the display 200 can be either portrait or landscape mode, as shown in the reference. Figure 9At this time, the second wheel shaft 316 is located in the first position of the shaft hole 304. When the user moves the display 200 downwards alone, the user can lock the display 200 in the rotation direction by hand so that the first wheel shaft 312 is locked in the rotation direction and the first wheel shaft 312 cannot rotate.
[0132] When the first gear shaft 312 moves downward, it drives the connecting bracket 302, the second gear shaft 316, and the second gear set 320 to move downward together along the direction of the rack 306. Because the rack 306 meshes with the fifth gear 322, the fifth gear 322 rotates clockwise, which in turn drives the fourth gear 321 to rotate clockwise through the third gear shaft 323. The rotating fourth gear 321 exerts a force to the right, a force away from the connecting bracket 302, and a tendency to rotate counterclockwise on the third gear 315. (Refer to...) Figure 10 At this time, the second wheel shaft 316 is in the reset state. However, because the first wheel shaft 312 is locked and the second wheel shaft 316 is limited to the first position by the shaft hole 304, the second wheel shaft 316 cannot rotate or move to the right. Therefore, referring to... Figure 11 Under the action of the third gear 315, the second wheel shaft 316 is driven to move axially away from the connecting bracket 302, and the first elastic element 340 is compressed until the second gear 314 is decoupled from the first gear 311. While keeping the first wheel shaft 312 from rotating, the display 200 can move downward independently without the user actively driving the second wheel shaft 316 to move, making operation easier.
[0133] According to some embodiments of this application, reference is made to Figure 1 and Figure 2 The support mechanism 300 may also include a guide component 307, which may be mounted on the mounting bracket 301 and may be arranged along the extension direction of the rack 306. The connecting bracket 302 may be movably mounted on the guide component 307.
[0134] The guide assembly 307 can be mounted on the mounting bracket 301 and arranged along the extension direction of the rack 306. By movably mounting the connecting bracket 302 on the guide assembly 307, the connecting bracket 302 can move along the extension direction of the guide assembly 307, thereby improving the installation strength of the connecting bracket 302 and its stability during movement.
[0135] In this embodiment, the connecting bracket 302 may include a connecting part 303 and a sliding part 305. The shaft hole 304 may be provided on the connecting part 303. The first wheel shaft 312, the second wheel shaft 316 and the third wheel shaft 323 may be rotatably mounted on the connecting part 303. Two sliding parts 305 may be provided, and the two sliding parts 305 are respectively provided on the left and right sides of the connecting part 303.
[0136] Two guide components 307 may be provided, spaced apart on the mounting bracket 301 in a left-right direction. Two sliding parts 305 are correspondingly and movably mounted on the two guide components 307. Each guide component 307 may have a guide groove, into which the sliding part 305 extends and engages. Furthermore, the inner wall of the guide groove may have multiple ball bearings arranged along the extension direction of the guide groove. The surface of the sliding part 305 has grooves that engage with the ball bearings to reduce resistance during sliding of the connecting bracket 302 and improve operational smoothness.
[0137] According to some embodiments of this application, reference is made to Figure 1 The support mechanism 300 may also include a second elastic element 308, which may be installed on the mounting bracket 301, and one end of the second elastic element 308 may be connected to the connecting bracket 302 and apply an upward elastic force to the connecting bracket 302.
[0138] The support mechanism 300 may include a second elastic member 308. One end of the second elastic member 308 may be connected to the connecting bracket 302, and the other end of the second elastic member 308 may be installed on the upper end of the mounting bracket 301 to apply an upward elastic force to the connecting bracket 302, so as to overcome the weight of the display 200 and keep the display 200 in the corresponding position.
[0139] In this embodiment, two second elastic elements 308 may be provided. The two second elastic elements 308 are arranged on the mounting bracket 301 with a distance between them in the left and right direction. One end of the second elastic element 308 may be connected to the sliding part 305 so that the force on the connecting bracket 302 is more balanced and the structural stability is higher.
[0140] In this embodiment, reference Figure 1 The second elastic element 308 can be a coil spring. In other embodiments, the second elastic element 308 can also be a spring or an elastic rope, etc., which is not limited here.
[0141] In the technical solution of this application, reference is made to Figure 12 The rotation radius is the distance from the rotation center of the monitor 200 to the top corner of the monitor 200. The interference between the monitor 200 and the desktop during the rotation from landscape to portrait mode is L. The rotation speed of the first gear 311 is n1 and the number of teeth is z1. The rotation speed of the second gear 314 is n2 and the number of teeth is z2. The rotation speed of the third gear 315 is n3 and the number of teeth is z3. The rotation speed of the fourth gear 321 is n4 and the number of teeth is z4. The rotation speed of the fifth gear 322 is n5 and the number of teeth is z5. The pitch circle diameter is d5. The moving speed of the connecting bracket 302 relative to the rack 306 is V. The unit of the moving speed V is mm / s and the unit of the rotation speed is r / min.
[0142] According to the transmission calculation formula:
[0143]
[0144] Where n2 = n3, n4 = n5, the calculation shows that:
[0145]
[0146] To prevent interference during the rotation of the display 200 from landscape to portrait mode, the display 200 needs to move upwards by L+x mm, where x is a safety distance. Calculations show that the gear dimensions of the first gear set 310 and the second gear set 320 satisfy the following relationship:
[0147]
[0148] This application also provides a display device 100, which includes a display 200 and a support mechanism 300 as described in any of the above embodiments. The display 200 is fixedly connected to a first gear set 310.
[0149] Since the support mechanism 300 is the support mechanism 300 as described in any of the above embodiments, the technical features and effects of the support mechanism 300 as described in any of the above embodiments will not be described in detail here.
[0150] The display device 100 can be a computer monitor, a television set, or a vehicle display screen, etc.
[0151] Taking display device 100 as a computer screen as an example, refer to Figure 12 The support mechanism 300 may also include a base, and the lower end of the mounting bracket 301 may be connected to the base.
[0152] According to the display device provided in the embodiments of this application, by setting the first gear set and the second gear set to switch between an engaged state and a decoupled state, the display can move upward synchronously during the rotation from a horizontal screen to a vertical screen to prevent collision. When there is no risk of collision, the display can rotate and move independently, making the display movement more flexible and easier to use.
[0153] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0154] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0155] In the description of this application, "first feature" and "second feature" may include one or more of the features.
[0156] In the description of this application, "multiple" means two or more.
[0157] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.
[0158] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.
[0159] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0160] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A support mechanism for adjusting a display, characterized in that, include: A first gear set, which is used to be fixedly connected to the display; The second gear set can switch between a meshing state and a decoupled state with the first gear set; A connecting bracket is provided, on which both the first gear set and the second gear set are rotatably mounted; The mounting bracket is provided with a rack for meshing with the second gear set, and the connecting bracket and the mounting bracket are slidably engaged along the extending direction of the rack; The first gear set includes: The first gear, the first axle of the first gear being used for fixed connection with the display; A second gear, which meshes with the first gear; The third gear is connected to the second gear via a second wheel shaft, and the third gear and the second gear set can switch between a meshing state and a decoupled state; The connecting bracket is provided with a shaft hole, and the second wheel shaft is movably disposed between a first position and a second position of the shaft hole. When the second wheel shaft moves between the first position and the second position, the third gear and the second gear set switch between a meshing state and a decoupled state. The shaft hole is arc-shaped, and the center of the shaft hole is located on the axis of the first wheel axle. The second wheel axle passes through the shaft hole. The axis of the first wheel axle is spaced apart from the axis of the second gear set. When the second wheel axle moves between the first position and the second position, the second gear and the first gear remain in a meshing state.
2. The support mechanism for adjusting the display according to claim 1, characterized in that, The support mechanism has a compound motion mode. In the compound motion mode, the second gear set is meshed with the first gear set, and the rack is meshed with the second gear set. The rotating first gear set drives the second gear set to rotate, and drives the first gear set, the second gear set and the connecting bracket to move along the rack.
3. The support mechanism for adjusting the display according to claim 1, characterized in that, The support mechanism has a rotation mode, in which the second gear set is decoupled from the first gear set, and the first gear set rotates.
4. The support mechanism for adjusting the display according to claim 1, characterized in that, The support mechanism has a first movement mode. In the first movement mode, the first gear set and the second gear set are decoupled. The first gear set moves along the mounting bracket, and the first gear set, the connecting bracket, and the second gear set move along the extension direction of the rack.
5. The support mechanism for adjusting the display according to claim 1, characterized in that, The support mechanism has a compound motion mode. In the compound motion mode, the second wheel axle is located at the first position, the third gear is meshed with the second gear set, and the second gear set is meshed with the rack.
6. The support mechanism for adjusting the display according to claim 1, characterized in that, The support mechanism has a rotation mode, in which the rotating first gear drives the second gear to rotate and drives the second axle to move to the second position, so that the third gear is decoupled from the second gear set.
7. The support mechanism for adjusting a display according to claim 1, characterized in that, The support mechanism has a first movement mode. In the first movement mode, the first axle is locked in the rotation direction. The first axle, which moves in the rack direction, drives the connecting bracket and the second gear set to move in the extension direction of the rack. The rotating second gear set drives the third gear to move the second axle to a second position so that the third gear is decoupled from the second gear set.
8. The support mechanism for adjusting the display according to claim 1, characterized in that, The second axle is axially mounted on the connecting bracket so that the second gear and the first gear can switch between an engaged state and a decoupled state.
9. The support mechanism for adjusting a display according to claim 7, characterized in that, It also includes: a sliding pad and a first elastic element, wherein the sliding pad is sleeved on the outside of the second wheel axle and abuts against the connecting bracket, the end face of the second wheel axle is provided with a flange, and the first elastic element is elastically connected between the flange and the sliding pad.
10. The support mechanism for adjusting a display according to claim 8, characterized in that, The second gear set includes: The fourth gear meshes with the third gear. Both the fourth gear and the third gear are helical gears, and the thickness of the fourth gear in the direction of the pivot axis is greater than the thickness of the third gear. The fifth gear is connected to the fourth gear via a third axle, which is pivotally mounted on the connecting bracket, and the fifth gear meshes with the rack. The support mechanism has a second movement mode. In the second movement mode, the first wheel axle is locked in the rotation direction. The first wheel axle, which moves in the rack direction, drives the connecting bracket and the second gear set to move in the extension direction of the rack. The rotating fourth gear drives the third gear to make the second wheel axle move axially, so as to decouple the second gear from the first gear.
11. The support mechanism for adjusting a display according to any one of claims 1-10, characterized in that, Also includes: A guide assembly is mounted on the mounting bracket and arranged along the extension direction of the rack, and the connecting bracket is movably mounted on the guide assembly.
12. The support mechanism for adjusting a display according to any one of claims 1-10, characterized in that, Also includes: A second elastic element is mounted on the mounting bracket, and one end of the second elastic element is connected to the connecting bracket, applying an upward elastic force to the connecting bracket.
13. A display device, characterized in that, include: monitor; The support mechanism as described in any one of claims 1-12, wherein the display is fixedly connected to the first gear set.