Screen support and its pitch joint

Abstract

A screen support and a pitch joint thereof, the pitch joint of the screen support comprising a joint unit and a movable unit. The joint unit includes a pivot base, a center block, a one-way rotating member and two damping bases. The center block has a circular segment and two non-circular segments. The one-way rotating member is installed between the pivot base and the center block. The damping bases are fixed on the non-circular segments respectively. Each of the damping bases has a first contact surface. The movable unit is rotatable relative to the pivot base in an up-down direction. The movable unit includes a movable base, two end covers and a center rod. Each of the end covers has a first friction surface frictionally rotatable engaged with a corresponding first contact surface. The resistance of the movable unit to rotate upward relative to the pivot base is less than the resistance of the movable unit to rotate downward relative to the pivot base.

Description

Technical Field

[0001] This utility model relates to a screen stand, and more particularly to a screen stand with better operating feel and its tilt joint. Background Technology

[0002] Screen stands can be used to support monitors and change viewing angles. Some screen stands also utilize a three-axis adjustable cantilever design, allowing the monitor to float on the desktop or be pulled and stopped at will in three-dimensional space, which is very convenient.

[0003] A monitor bracket and its adjustment mechanism, exemplified by CN221570038U, are suitable for connecting a liquid crystal display (LCD). The adjustment mechanism includes a U-shaped component, a support component, two friction components, two gaskets, and a fastener. The U-shaped component has two parallel extending flaps. The support component is housed between the flaps. The friction components are located on the outer sides of the flaps. The gaskets are sandwiched between the flaps and the friction components. The fastener passes through the friction components, the gaskets, the flaps, and the support component. Through the friction between the inner surface of the flaps and the two ends of the support component, and the friction between the outer surface of the flaps and the gaskets, the LCD is prevented from drooping, providing a friction-based suspension positioning function.

[0004] However, the aforementioned adjustment mechanism requires overcoming both gravity and friction when lifting the liquid crystal display, which is quite strenuous and results in a poor operating feel. Utility Model Content

[0005] The purpose of this invention is to provide a tilt joint for a screen stand with better handling.

[0006] The tilt joint of this utility model's screen bracket includes a connector unit and a movable unit. The connector unit includes a pivot, a central block, a one-way rotating member, and two damping seats. The pivot has a groove surrounding an axis. The central block is disposed in the groove along the axis and has a circular segment and two non-circular segments connected to opposite sides of the circular segment in a left-right direction. The axis extends in the left-right direction. The one-way rotating member is rotatably mounted between the pivot and the central block and is fitted onto the circular segment of the central block. The damping seats are respectively fixed to the non-circular segments and adjacent to the one-way rotating member, each damping seat having a first contact surface surrounding the axis. The movable unit is used to mount the connector unit and can rotate vertically relative to the pivot. The movable unit includes a movable seat rotatable relative to the pivot, two end caps spaced apart in the movable seat in the left-right direction and respectively frictionally engaged with the damping seats, and a central rod passing through the end caps, the movable seats, and the connector unit along the axis. Each of the end caps has a first friction surface that is frictionally rotatably engaged with a corresponding first contact surface around the axis. The resistance to upward rotation of the movable unit relative to the pivot is less than the resistance to downward rotation of the movable unit relative to the pivot.

[0007] The tilt joint of the screen bracket of this utility model includes an inner wall surrounding the axis and an outer wall spaced around the outer side of the inner wall. The inner wall forms a first friction surface, and the outer wall has a second friction surface surrounding the axis and a third friction surface surrounding the outer side of the second friction surface. Each damping seat includes an inner ring surrounding the axis and an outer ring spaced around the outer side of the inner ring. The inner ring has a first contact surface and a second contact surface surrounding the outer side of the first contact surface and frictionally engaging with the second friction surface. The outer ring has a third contact surface surrounding the outer side of the second contact surface and frictionally engaging with the third friction surface.

[0008] The tilt joint of the screen bracket of this utility model has a tapered shape for the inner wall, the outer wall, and the inner ring.

[0009] In the tilt joint of the screen bracket of this utility model, both the first friction surface and the first contact surface are conical surfaces.

[0010] The pitch joint of the screen bracket of this utility model includes each of the damping seats including an inner ring surrounding the axis, the inner ring being cylindrical in shape and having the first contact surface, and each of the end caps including an inner wall surrounding the axis, the inner wall being cylindrical in shape and forming the first friction surface.

[0011] The tilt joint of the screen bracket of this utility model includes a tilt limiting rod disposed on the movable seat. The pivot seat also has a limiting groove for the tilt limiting rod to slide, and the two opposite ends of the limiting groove are disposed oppositely in the vertical direction.

[0012] The tilt joint of the screen bracket of this utility model has a pivot having a cylindrical body forming the receiving groove and two extension arms extending from the cylindrical body. The limiting groove is formed on the outer surface of the cylindrical body and surrounds the axis and is arc-shaped.

[0013] Another objective of this invention is to provide a screen stand with better handling.

[0014] This utility model discloses a screen bracket suitable for screen mounting. The screen bracket includes a connecting unit and a tilt joint as described above. The connecting unit is adapted for connecting the screen. The movable seat of the tilt joint is fixed to the connecting unit.

[0015] The screen bracket of this utility model includes a connecting unit comprising a connecting seat and a fixing seat. The connecting seat is used for mounting the tilt joint, and the fixing seat is suitable for connecting the screen and can be detachably mounted on the connecting seat.

[0016] The screen bracket of this utility model has a connecting base with a connecting plate for mounting the pitch joint and a turntable that can rotate relative to the connecting plate.

[0017] The beneficial effects of this utility model are as follows: the one-way rotating component is set between the pivot of the pitch joint and the center block. Through the one-way transmission characteristic of the one-way rotating component, the linkage relationship between the pivot and the center block is changed. When the screen is lifted, no friction is generated between the end cover and the damping seat. Therefore, the user can easily lift the screen, which provides a better operating feel. At the same time, it can also reduce the wear of components and extend their service life. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram illustrating that the first embodiment of the screen bracket of this utility model is suitable for mounting a single screen;

[0019] Figure 2 This is a rear view of the first embodiment;

[0020] Figure 3 This is an exploded perspective view of the first embodiment;

[0021] Figure 4 Viewed from another angle Figure 3 3D exploded view;

[0022] Figure 5 This is a three-dimensional exploded view of a pitch joint in the first embodiment;

[0023] Figure 6 This is a three-dimensional exploded view of a joint unit of the pitch joint;

[0024] Figure 7 Viewed from another angle Figure 6 3D exploded view;

[0025] Figure 8 It is along Figure 2 The line in - The sectional view that was cut off;

[0026] Figure 9 It is along Figure 2 The line in - The sectional view that was cut off;

[0027] Figure 10 This is a schematic diagram illustrating the state in which the inner ring of a one-way rotating component of the connector unit cannot rotate relative to the outer ring;

[0028] Figure 11 This is a schematic diagram illustrating the state in which the inner ring of the unidirectional rotating component can rotate relative to the outer ring;

[0029] Figure 12 It is similar to Figure 9 A cross-sectional view, but one movable unit of the pitch joint rotates downwards;

[0030] Figure 13 It is similar to Figure 9 A cross-sectional view, but the active unit rotates upwards;

[0031] Figure 14 This is a schematic diagram illustrating the action of pushing the screen down;

[0032] Figure 15 It is similar to Figure 14 The diagram illustrates the action, but the screen is raised.

[0033] Figure 16 This is an incomplete exploded perspective view illustrating a pitch joint of a second embodiment of the screen bracket of this utility model.

[0034] Figure 17 This is a cross-sectional view of the pitch joint in the second embodiment. Detailed Implementation

[0035] Before this utility model is described in detail, it should be noted that similar elements are represented by the same reference numerals in the following description.

[0036] See Figures 1 to 3 The first embodiment of this utility model screen bracket is suitable for mounting a screen 9. The screen bracket includes a connecting unit 100 and a pitch joint 200. The connecting unit 100 is suitable for connecting the screen 9. Although not shown in the drawings, it can be understood that the pitch joint 200 is suitable for mounting to a cantilever, allowing the screen 9 to rotate or move freely in three-dimensional space.

[0037] See Figure 1 , Figure 3 and Figure 4 The connection unit 100 includes a connecting base 11 and a fixing base 12. The connecting base 11 is used for mounting the pitch joint 200, and the fixing base 12 is suitable for connecting the screen 9.

[0038] The connecting base 11 has a connecting plate 111 for mounting the pitch joint 200, and a turntable 112 rotatable relative to the connecting plate 111. The connecting plate 111 has a mounting groove 113, a central hole 114, and a plurality of locking holes 115. The mounting groove 113 has an open end 116. The central hole 114 surrounds a center line L, which extends in a front-rear direction X. The locking holes 115 surround the outside of the central hole 114. The turntable 112 is circular and rotatable relative to the connecting plate 111 about the center line L. The turntable 112 has a notch 117 for aligning with the open end 116 of the mounting groove 113.

[0039] The mounting base 12 is detachably mounted on the connecting base 11 and has multiple locking slots 121 and a fitting piece 122. The locking slots 121 are located at the four corners, each being a long, obliquely oriented slot. The screen 9 is secured to the mounting base 12 via the locking slots 121. The fitting piece 122 is used to insert into the mounting slot 113 when the notch 117 of the turntable 112 aligns with the open end 116 of the mounting slot 113, facilitating the mounting of the mounting base 12 onto the connecting base 11. Then, by rotating the turntable 112, the notch 117 of the turntable 112 is moved away from the open end 116 of the mounting slot 113, and the open end 116 is closed by the turntable 112, thus securing the mounting base 12 to the connecting base 11.

[0040] The pitch joint 200 is mounted on the connecting seat 11 of the connecting unit 100 along the front-rear direction X. The pitch joint 200 includes a joint unit 3 and a movable unit 4 mounted on the joint unit 3.

[0041] See Figures 4 to 6 The connector unit 3 is adapted to be installed on the cantilever and includes a pivot 31, a center block 32, a one-way rotating member 33, and two damping seats 34. The pivot 31 has a generally cylindrical body 311 and two extension arms 312 extending from the body 311. The body 311 has a receiving groove 313 and a limiting groove 314. The receiving groove 313 surrounds an axis C, which extends in a left-right direction Y and is substantially perpendicular to the center line L (see...). Figure 3 ).

[0042] See Figure 4 and Figure 7 The limiting groove 314 is formed on the outer surface of the cylinder 311 and surrounds the axis C in an arc shape. The two opposite ends of the limiting groove 314 are arranged oppositely in a vertical direction Z. The extension arm 312 is arranged oppositely in the vertical direction Z and is adapted to be locked to the cantilever.

[0043] See Figures 6 to 8 The central block 32 is disposed in the receiving groove 313 along the axis C, and has a circular segment 321 and two non-circular segments 322 connected to the two opposite sides of the circular segment 321 along the left-right direction Y. The central block 32 also forms a shaft hole 323 surrounding the axis C.

[0044] See Figures 7 to 9 The one-way rotating member 33 is installed between the pivot 31 and the center block 32, and is sleeved on the circular segment 321 of the center block 32. In this embodiment, the one-way rotating member 33 is a one-way needle roller bearing, with its outer ring fixed to the pivot 31 and its inner ring fixed to the center block 32. When the inner ring of the one-way rotating member 33 can rotate relative to the outer ring, the center block 32 can rotate relative to the pivot 31. When the inner ring of the one-way rotating member 33 cannot rotate relative to the outer ring, the center block 32 is rigidly connected to the pivot 31 and allows the transmission of torque, thus providing a one-way transmission function.

[0045] See Figures 6 to 8The damping seats 34 are respectively fixed to the non-circular segment 322 and adjacent to the unidirectional rotating member 33 in the left-right direction Y. Each damping seat 34 includes a seat body 341, an inner ring 342 disposed on the seat body 341 and surrounding the axis C, and an outer ring 343 disposed on the seat body 341 and spaced around the outer side of the inner ring 342. The seat body 341 has a non-circular groove 344 opposite to the inner ring 342 and the outer ring 343 in the left-right direction Y. The non-circular groove 344 engages with the non-circular segment 322 of the center block 32, so that the damping seat 34 is fixed on the center block 32. Each damping seat 34 also forms a circular hole 345 surrounding the axis C, and the circular hole 345 is in spatial communication with the non-circular groove 344. The inner ring 342 has a first contact surface 346 surrounding the axis C and a second contact surface 347 surrounding the outer side of the first contact surface 346. In this embodiment, the inner ring 342 is conical in shape, and the first contact surface 346 is a conical surface that tapers towards the axis C, while the second contact surface 347 is a conical surface that tapers away from the axis C. The outer ring 343 has a third contact surface 348 surrounding the outside of the second contact surface 347, and the third contact surface 348 is a conical surface that tapers towards the axis C.

[0046] See Figure 4 , Figure 5 and Figure 8 The movable unit 4 is installed on and fixed to the connector unit 3 in the connecting unit 100. The movable unit 4 can rotate relative to the pivot 31 in the vertical direction Z, thereby adjusting the pitch angle of the movable unit 4. The movable unit 4 includes a movable seat 41, two end caps 42, a central rod 43, and a pitch limiting rod 44.

[0047] The movable seat 41 is fixed to the connecting seat 11 and screwed into the locking hole 115 of the connecting plate 111. The movable seat 41 is rotatable relative to the pivot 31. The movable seat 41 is generally U-shaped and has a base wall 411 and two side walls 412 formed on opposite sides of the base wall 411. The base wall 411 has a fixing hole 413 extending in the front-rear direction X. The side walls 412 are respectively for abutting against the damping seat 34. Each side wall 412 has a mounting hole 414.

[0048] The end caps 42 are spaced apart along the left-right direction Y on the movable seat 41 and respectively frictionally engage with the damping seat 34. The end caps 42 are respectively mounted on the sidewalls 412. Each end cap 42 includes a main wall 421 corresponding to the shape of the sidewall 412, an inner wall 422 extending from the main wall 421 and passing through a respective mounting hole 414, and an outer wall 423 spaced around the outer side of the inner wall 422 and passing through the respective mounting hole 414. Both the inner wall 422 and the outer wall 423 surround the axis C. Each end cap 42 also forms an opening 424 surrounding the axis C. The inner wall 422 forms a first friction surface 425 surrounding the axis C. The outer wall 423 has a second friction surface 426 surrounding the axis C and a third friction surface 427 surrounding the outer side of the second friction surface 426. In this embodiment, the inner wall 422 and the outer wall 423 are both conical in shape, and the first friction surface 425, the second friction surface 426 and the third friction surface 427 are all conical surfaces.

[0049] The first friction surface 425 is frictionally rotatably engaged with the first contact surface 346 of the corresponding damping seat 34, the second friction surface 426 is frictionally rotatably engaged with the corresponding second contact surface 347, and the third friction surface 427 is frictionally rotatably engaged with the corresponding third contact surface 348, thereby generating friction between the end cap 42 and the damping seat 34, causing the screen 9 (see...) to... Figure 1 It can rotate and stop at will, and the screen 9 will not droop. It is understood that this embodiment utilizes the double-ring design of each end cap 42 and each damping seat 34 to increase the friction area and generate more friction, thus supporting the relatively heavy screen 9.

[0050] The central rod 43 passes through the end cap 42, the movable seat 41, and the connector unit 3 along the axis C. Specifically, the central rod 43 passes through the opening 424 of the end cap 42 and the shaft hole 323 of the central block 32, and one end of the central rod 43 is screwed to one of the end caps 42. The central rod 43 does not substantially contact the central block 32. A spring washer is provided between the head of the central rod 43 and the adjacent end cap 42.

[0051] See Figure 4 and Figure 9 The pitch limiting rod 44 is screwed into the fixing hole 413 of the movable seat 41 and the center hole 114 of the connecting plate 111, and partially extends into the limiting groove 314. The pitch limiting rod 44 can slide relative to the upper and lower end points of the limiting groove 314, thereby limiting the pitch angle of the movable unit 4. The screen 9 (see Figure 1It will not be excessively lifted or pushed down.

[0052] See Figure 10 and Figure 11 The following describes the torque transmission method when the movable unit 4 rotates relative to the pivot 31. For ease of explanation, the connecting unit 100 is drawn with a dashed line, and the moving elements between the joint unit 3 and the movable unit 4 are indicated by gray fill in the figure, while the non-moving elements are not filled in.

[0053] Figure 10 This is the state where the inner ring of the one-way rotating member 33 cannot rotate relative to the outer ring (i.e., the locked state). The center block 32 is rigidly connected to the pivot 31 through the one-way rotating member 33. The center block 32 and the pivot 31 will not rotate relative to each other. The damping seat 34 is constrained by the center block 32 and cannot rotate. During torque transmission, the rotating components are the movable seat 41, the end cover 42, the center rod 43, and the pitch limiting rod 44. Friction is generated between the end cover 42 and the damping seat 34 due to their mutual rotation. This friction prevents the movable unit 4 from rotating downwards, thus preventing the screen 9 (see...) from rotating downwards. Figure 1 It droops due to its own weight.

[0054] Figure 11 This refers to the state where the inner ring of the unidirectional rotating component 33 can rotate relative to the outer ring (i.e., the free rotation state). The center block 32 and the pivot 31 can rotate relative to each other. During torque transmission, the rotating components are the movable seat 41, the end cap 42, the center rod 43, the pitch limiting rod 44, the damping seat 34, and the center block 32. At this time, the end cap 42 and the damping seat 34 move in tandem, and no friction is generated.

[0055] See Figure 12 and Figure 13 When the connecting unit 100 is rotated, it will cause the movable unit 4 to rotate up and down in the vertical direction Z relative to the pivot 31, so as to adjust the screen 9 (see Figure 1 The angle of elevation of ( ).

[0056] See Figure 12 and Figure 14 and cooperate Figure 8When the screen 9 is pushed down, since the inner ring of the one-way rotating member 33 cannot rotate relative to the outer ring, the frictional force between the end cap 42 and the damping seat 34 must be overcome in order for the movable unit 4 to rotate downward relative to the pivot 31. Therefore, the pushing force must overcome at least the weight of the screen 9 plus the frictional force between the end cap 42 and the damping seat 34. During the downward rotation of the movable unit 4, when the pitch limiting rod 44 moves to the lower end of the limiting groove 314, it can no longer be pushed down.

[0057] like Figure 13 and Figure 15 As shown, and in conjunction with Figure 8 When the screen 9 is rotated upwards, since the inner ring of the one-way rotating member 33 can rotate relative to the outer ring, and the center block 32 and the pivot 31 can rotate relative to each other, no friction is generated between the end cap 42 and the damping seat 34. The lifting force only needs to overcome the weight of the screen 9. Therefore, the resistance to lifting the screen 9 is less than the resistance to pushing the screen 9 downwards, making it easier to use.

[0058] See Figures 16 to 17 The second embodiment of this utility model is similar to the first embodiment, except that:

[0059] Each of the damping seats 34 is a single-ring design and includes a seat body 341 and an inner ring 342 disposed on the seat body 341. The seat body 341 has a non-circular groove 344 opposite to that of the inner ring 342 in the left-right direction Y. The inner ring 342 is cylindrical in shape and has a first contact surface 346, which is a conical surface.

[0060] Each end cap 42 is a single-ring design and includes a main wall 421 and an inner perimeter wall 422 extending from the main wall 421. The inner perimeter wall 422 is cylindrical in shape and has a first friction surface 425, which is a conical surface and frictionally engages with the first contact surface 346. This embodiment also enables frictional force to be generated between the end cap 42 and the damping seat 34.

[0061] In summary, the screen bracket of this utility model, by setting the one-way rotating member 33 between the pivot 31 and the center block 32, changes the linkage between the pivot 31 and the center block 32 through the characteristic that the one-way rotating member 33 can only transmit power in one direction. When the screen 9 is lifted, no friction is generated between the end cover 42 and the damping seat 34. Therefore, the resistance of the movable unit 4 to the upward rotation relative to the pivot 31 is less than the resistance of the movable unit 4 to the downward rotation relative to the pivot 31. The user can easily lift the screen 9 with less effort and better operating feel. At the same time, it can also reduce the wear caused by friction between the end cover 42 and the damping seat 34, extend the service life of the equipment, and thus effectively achieve the purpose of this utility model.

Claims

1. A tilt joint for a screen bracket, characterized in that: Include: The connector unit includes: A pivot seat, having a groove surrounding an axis. A central block is disposed in the receiving groove along the axis and has a circular segment and two non-circular segments connected to opposite sides of the circular segment in a left-right direction, the axis extending in the left-right direction. A one-way rotating component is installed between the pivot and the central block, and is fitted onto the circular segment of the central block. Two damping seats are fixed to the non-circular segment and adjacent to the unidirectional rotating member, each damping seat having a first contact surface surrounding the axis; and The movable unit is for mounting the connector unit and can rotate vertically relative to the pivot. The movable unit includes a movable seat that can rotate relative to the pivot, two end caps that are spaced apart along the left-right direction and respectively frictionally engaged with the damping seat, and a central rod that passes through the end caps, the movable seats and the connector unit along the axis. Each end cap has a first friction surface that surrounds the axis and is frictionally engaged with a corresponding first contact surface. The resistance to the movable unit's upward rotation relative to the pivot is less than the resistance to the movable unit's downward rotation relative to the pivot.

2. The pitch joint of the screen bracket according to claim 1, characterized in that: Each of the end caps includes an inner wall surrounding the axis and an outer wall spaced around the outer side of the inner wall, the inner wall forming the first friction surface, the outer wall having a second friction surface surrounding the axis and a third friction surface surrounding the outer side of the second friction surface, each of the damping seats includes an inner ring surrounding the axis and an outer ring spaced around the outer side of the inner ring, the inner ring having the first contact surface and a second contact surface surrounding the outer side of the first contact surface and frictionally engaging with the second friction surface, the outer ring having a third contact surface surrounding the outer side of the second contact surface and frictionally engaging with the third friction surface.

3. The pitch joint of the screen bracket according to claim 2, characterized in that: The inner wall, the outer wall, and the inner ring are all conical in shape.

4. The pitch joint of the screen bracket according to claim 1, characterized in that: Both the first friction surface and the first contact surface are conical surfaces.

5. The pitch joint of the screen bracket according to claim 1, characterized in that: Each of the damping seats includes an inner ring surrounding the axis, the inner ring being cylindrical in shape and having the first contact surface, and each of the end caps includes an inner wall surrounding the axis, the inner wall being cylindrical in shape and forming the first friction surface.

6. The pitch joint of the screen bracket according to claim 1, characterized in that: The movable unit also includes a pitch limiting rod disposed on the movable seat, and the pivot seat also has a limiting groove for the pitch limiting rod to slide, with the two opposite ends of the limiting groove disposed oppositely in the vertical direction.

7. The pitch joint of the screen bracket according to claim 6, characterized in that: The pivot has a cylindrical body forming the receiving groove and two extension arms extending from the cylindrical body. The limiting groove is formed on the outer surface of the cylindrical body and is arc-shaped around the axis.

8. A screen bracket suitable for screen mounting, characterized in that: The screen bracket includes: Connection unit, adapted for connecting the screen; and The pitch joint according to any one of claims 1 to 7, wherein the movable seat of the pitch joint is fixed to the connecting unit.

9. The screen bracket according to claim 8, characterized in that: The connection unit includes a connector and a mounting base. The connector is for mounting the pitch joint, and the mounting base is suitable for connecting the screen and can be detachably mounted on the connector.

10. The screen bracket according to claim 9, characterized in that: The connecting seat has a connecting plate for mounting the pitch joint and a turntable that can rotate relative to the connecting plate.

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