Hand-cranking view screen cart

Abstract

The utility model discloses a hand-cranking view screen cart, which relates to an electronic screen support and is characterized by comprising a movable base, a fixed rod fixedly connected onto the movable base, a telescopic rod arranged in the fixed rod and a driving mechanism arranged in the fixed rod and used for controlling the length of the telescopic rod extending out of the fixed rod. A limiting mechanism used for limiting separation of the telescopic rod and the fixed rod is arranged between the telescopic rod and the fixed rod, and a damping adjusting mechanism used for adjusting moving damping force is arranged between the telescopic rod and the fixed rod. By adjusting the damping acting force, damping can be increased before the electronic display screen is hung, so that the effect of counteracting on the reciprocating screw rod after the electronic display screen is installed is shared, the burden of the reciprocating screw rod is reduced, the service life is prolonged, and meanwhile the bevel gear set is driven to move through rotation of the handle. Therefore, the vertical displacement of the telescopic rod can be realized, and the height of the electronic display screen can be adjusted.

Description

Technical Field

[0001] The utility model relates to an electronic screen bracket, and more particularly to a hand-cranked video screen trolley. Background Art

[0002] The mobile TV stand is specially developed for large-size and heavy-duty displays. It is suitable for conference halls, exhibition halls, hotels, airports, railway stations, hospitals, bus stations, shopping malls, trade fairs and other places. It has a solid structure and is easy to install. It is equipped with TV peripheral spare parts and camera placement equipment, and the display can be slightly moved up and down.

[0003] The Chinese patent with publication number CN216923886U discloses a mobile pan-tilt bracket for a large-screen laser TV cart, the technical points of which are: casters are installed at the four corners of the bottom of the base, the lower column is installed in the two square holes on the rear side of the base and fixed by screws, the height-adjustable upper column is plugged into the lower column and locked by screws, the two square holes on the front side of the base are plugged into and fixed with tray support rods, the tray support slide rods are plugged into the tray support rods and locked by screws, the upper part of the tray support slide rods is fixed to the bottom of the tray, the two ends of the fixed cross bar are slidably plugged with sliding cross bars and locked by lotus root threads, the fixed cross bar is fixed to the upper and lower ends of the upper column by screws, the audio bracket is fixed to the lower column with adjustable height, the camera support plate is fixed to the camera bracket, and the camera bracket is adjustably installed in the middle of the upper column.

[0004] The height-adjustable upper column and the lower column are plugged into each other and then locked with screws. Although the screw locking method can directly fix the upper column and the lower column, in actual use, frequent disassembly and assembly of the screws can easily cause the screws to loosen or be damaged, affecting the stability of the overall structure, increasing maintenance costs and safety hazards. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a hand-cranked video screen trolley.

[0006] The above technical objectives of the present utility model are achieved through the following technical solutions: a hand-cranked video cart comprises a mobile base, the mobile base is fixedly connected to a fixed rod, a telescopic rod is provided inside the fixed rod, a driving mechanism for controlling the length of the telescopic rod extending out of the fixed rod is provided inside the fixed rod, a limiting mechanism for limiting the separation of the telescopic rod and the fixed rod is provided between the telescopic rod and the fixed rod, a damping adjustment mechanism for adjusting the movement damping force is provided between the telescopic rod and the fixed rod, a storage platform is connected to the fixed rod, and the top end of the telescopic rod is fixedly connected to a mounting bracket for mounting a display screen.

[0007] The utility model is further configured as follows: the damping adjustment mechanism includes a damping brake pad and an adjustment plate, the adjustment plate is slidingly connected to the damping brake pad, and the adjustment plate adjusts the force of the damping brake pad against the fixed rod or the telescopic rod according to the degree to which it passes through the damping brake pad.

[0008] The utility model is further configured as follows: the damping brake pad includes an upper brake sleeve and a lower brake pad, the upper brake sleeve is sleeved on the top of the fixed rod, the lower brake pad is fixedly connected to the outer wall of the telescopic rod, and several adjustment plates respectively pass through the upper brake sleeve and the lower brake pad.

[0009] The utility model is further configured as follows: a non-return structure is provided between the damping brake pad and the adjusting plate, and the non-return structure is used to limit the unidirectional displacement of the adjusting plate.

[0010] The utility model is further configured as follows: the anti-return structure includes fixed teeth and one-way teeth, the fixed teeth are fixedly connected to the damping brake pad, and the one-way teeth are arranged on the adjustment plate and arranged toward the fixed teeth.

[0011] The utility model is further configured as follows: the fixing rod and the telescopic rod are provided with embedding grooves, and the upper brake sleeve and the lower brake pad are provided with a plurality of embedding teeth embedded in the embedding grooves.

[0012] The utility model is further configured as follows: the driving mechanism includes a reciprocating screw and a bevel gear set, the interior of the telescopic rod is fixedly connected to a nut seat sleeved on the reciprocating screw, and the limiting mechanism includes a limiting seat fixedly connected to the telescopic rod and rotatably connected to the top end of the reciprocating screw.

[0013] The utility model is further configured as follows: the bevel gear set is arranged at the bottom end of the reciprocating screw, and the input end of the bevel gear set is connected to a handle.

[0014] In summary, the present invention has the following beneficial effects:

[0015] By pulling the adjusting plate in one direction, the thicker end of the adjusting plate is gradually inserted into the upper brake sleeve or lower brake pad, thereby increasing the overall thickness of the upper brake sleeve or lower brake pad, realizing damping adjustment, and the mutual interference between the one-way teeth and the fixed teeth prevents the adjusting plate from detaching from the upper brake sleeve or lower brake pad. If loosening is required, only the adjusting plate needs to be bent to separate the one-way teeth from the fixed teeth, and then act along the length direction of the adjusting plate to adjust the degree to which the adjusting plate is inserted into the upper brake sleeve or lower brake pad, thereby affecting the distance between the upper brake sleeve, lower brake pad and the fixed rod or telescopic rod to achieve the effect of adjusting the damping. By adjusting the damping force, the damping can be increased before hanging the electronic display screen, thereby sharing the effect of the reaction of the electronic display screen on the reciprocating screw after installation, thereby reducing the burden on the reciprocating screw and extending its service life. At the same time, the handle is rotated to drive the movement of the bevel gear group, thereby driving the reciprocating screw to rotate forward or reverse, which can realize the vertical displacement of the telescopic rod and thus adjust the height of the electronic display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0018] Figure 3 It is a partial cross-sectional view of the utility model;

[0019] Figure 4 for Figure 3 An enlarged schematic diagram of part B;

[0020] Figure 5 for Figure 3 An enlarged schematic diagram of part C;

[0021] Figure 6 for Figure 3 An enlarged schematic diagram of part D of FIG.

[0022] In the figure: 1. Mobile base; 2. Fixed rod; 3. Telescopic rod; 4. Damping adjustment mechanism; 41. Damping brake pad; 411. Upper brake sleeve; 412. Lower brake pad; 42. Adjusting plate; 421. Fixed tooth; 422. One-way tooth; 43. Cog; 5. Storage platform; 6. Mounting bracket; 7. Cog; 8. Reciprocating screw; 9. Bevel gear set; 10. Nut seat; 11. Limit seat; 12. Handle. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] Hand-cranked video trolleys, such as Figure 1 and Figure 3As shown, it includes a mobile base 1, to which a fixed rod 2 is fixedly connected, a telescopic rod 3 is provided inside the fixed rod 2, and a driving mechanism for controlling the length of the telescopic rod 3 extending out of the fixed rod 2 is provided inside the fixed rod 2. In this embodiment, the driving mechanism includes a reciprocating screw 8 and a bevel gear set 9. The inside of the telescopic rod 3 is fixedly connected to a nut seat 10 sleeved on the reciprocating screw 8. A limiting mechanism for limiting the separation of the telescopic rod 3 and the fixed rod 2 is provided between the telescopic rod 3 and the fixed rod 2. The limiting mechanism includes a limiting seat 11 fixedly connected to the telescopic rod 3 and rotatably connected to the top end of the reciprocating screw 8. A damping adjustment mechanism 4 for adjusting the moving damping force is provided between the telescopic rod 3 and the fixed rod 2. A storage platform 5 is connected to the fixed rod 2, and the top of the telescopic rod 3 is fixedly connected to a mounting bracket 6 for mounting a display screen.

[0025] like Figure 2 and Figure 4 As shown, the damping adjustment mechanism 4 includes a damping brake pad 41 and an adjusting pad 42, and the adjusting pad 42 is slidably connected to the damping brake pad 41. The adjusting pad 42 adjusts the force of the damping brake pad 41 against the fixed rod 2 or the telescopic rod 3 according to the degree to which it passes through the damping brake pad 41, wherein the damping brake pad 41 includes an upper brake sleeve 411 and a lower brake pad 412, the upper brake sleeve 411 is sleeved on the top of the fixed rod 2, and the lower brake pad 412 is fixedly connected to the outer wall of the telescopic rod 3, and the fixed rod 2 and the telescopic rod 3 are provided with an embedding groove 7, and the upper brake sleeve 411 and the lower brake pad 412 are provided with an embedding groove 7. The plurality of cogs 43 inside are embedded in the embedding groove 7 through the cogs 43, so that the upper brake sleeve 411 and the lower brake pad 412 are detachably connected to the fixed rod 2 and the telescopic rod 3 respectively, and the inner and outer surfaces of the telescopic rod 3 and the fixed rod 2 interfere with each other to achieve a firm installation, and the plurality of adjustment plates 42 respectively penetrate the upper brake sleeve 411 and the lower brake pad 412, so that by pulling the adjustment plate 42 to insert into the upper brake sleeve 411 or the lower brake pad 412, the interference between the upper brake sleeve 411 or the lower brake pad 412 and the fixed rod 2 or the telescopic rod 3 can be adjusted, thereby adjusting the damping force between the fixed rod 2 and the telescopic rod 3.

[0026] like Figure 4 、 Figure 5 and Figure 6As shown, a non-return structure is provided between the damping brake pad 41 and the adjusting pad 42, and the non-return structure is used to limit the unidirectional displacement of the adjusting pad 42. Specifically, the non-return structure includes a fixed tooth 421 and a one-way tooth 422. The fixed tooth 421 is fixedly connected to the damping brake pad 41, and the one-way tooth 422 is arranged on the adjusting pad 42 and is arranged toward the fixed tooth 421. When adjusting, by pulling the adjusting pad 42 in one direction, the thicker end of the adjusting pad 42 gradually penetrates into the upper brake sleeve 411 or the lower brake pad 412, thereby increasing the overall thickness of the upper brake sleeve 411 or the lower brake pad 412, and realizing damping adjustment. The mutual interference between the one-way tooth 422 and the fixed tooth 421 prevents the adjusting pad 42 from detaching from the upper brake sleeve 411 or the lower brake pad 412. , it is only necessary to bend the adjusting piece 42 to separate the one-way tooth 422 from the fixed tooth 421, and then act along the length direction of the adjusting piece 42 to adjust the degree to which the adjusting piece 42 is inserted into the upper brake sleeve 411 or the lower brake pad 412, thereby affecting the distance between the upper brake sleeve 411, the lower brake pad 412 and the fixed rod 2 or the telescopic rod 3, so as to achieve the effect of adjusting the damping. By adjusting the damping force, it is possible to increase the damping before hanging the electronic display screen, thereby sharing the effect of the reaction of the electronic display screen to the reciprocating screw rod 8 after installation, thereby reducing the burden on the reciprocating screw rod 8 and extending its service life. At the same time, the handle 12 is used to rotate to drive the bevel gear set 9 to move, thereby driving the reciprocating screw rod 8 to rotate forward or reverse, which can achieve the vertical displacement of the telescopic rod 3 and thus adjust the height of the electronic display screen.

[0027] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A hand-cranked video screen trolley, characterized by: The invention comprises a mobile base (1), wherein a fixed rod (2) is fixedly connected to the mobile base (1), a telescopic rod (3) is provided in the fixed rod (2), a driving mechanism for controlling the length of the telescopic rod (3) extending from the fixed rod (2) is provided in the fixed rod (2), a limiting mechanism for limiting the separation of the telescopic rod (3) and the fixed rod (2) is provided between the telescopic rod (3) and the fixed rod (2), a damping adjustment mechanism (4) for adjusting the movement damping force is provided between the telescopic rod (3) and the fixed rod (2), a storage platform (5) is connected to the fixed rod (2), and a mounting bracket (6) for mounting a display screen is fixedly connected to the top end of the telescopic rod (3).

2. The hand-cranked video screen trolley according to claim 1, characterized in that: The damping adjustment mechanism (4) comprises a damping brake pad (41) and an adjustment pad (42), wherein the adjustment pad (42) is slidably connected to the damping brake pad (41), and the adjustment pad (42) adjusts the force exerted by the damping brake pad (41) against the fixed rod (2) or the telescopic rod (3) according to the extent to which the adjustment pad (42) passes through the damping brake pad (41).

3. The hand-cranked video screen trolley according to claim 2, characterized in that: The damping brake pad (41) includes an upper brake sleeve (411) and a lower brake pad (412), wherein the upper brake sleeve (411) is sleeved on the top of the fixed rod (2), and the lower brake pad (412) is fixedly connected to the outer wall of the telescopic rod (3), and a plurality of adjustment plates (42) respectively penetrate the upper brake sleeve (411) and the lower brake pad (412).

4. The hand-cranked video screen trolley according to claim 2, characterized in that: A non-return structure is provided between the damping brake plate (41) and the regulating plate (42), and the non-return structure is used to limit the unidirectional displacement of the regulating plate (42).

5. The hand-cranked video screen trolley according to claim 4, characterized in that: The anti-return structure comprises a fixed tooth (421) and a one-way tooth (422), wherein the fixed tooth (421) is fixedly connected to the damping brake plate (41), and the one-way tooth (422) is arranged on the adjustment plate (42) and is arranged in the direction of the fixed tooth (421).

6. The hand-cranked video screen trolley according to claim 3, characterized in that: The fixed rod (2) and the telescopic rod (3) are provided with an embedding groove (7), and the upper brake sleeve (411) and the lower brake pad (412) are provided with a plurality of cogging teeth (43) embedded in the embedding groove (7).

7. The hand-cranked video screen trolley according to claim 1, characterized in that: The driving mechanism comprises a reciprocating screw (8) and a bevel gear set (9); a nut seat (10) sleeved on the reciprocating screw (8) is fixedly connected inside the telescopic rod (3); and the limiting mechanism comprises a limiting seat (11) fixedly connected inside the telescopic rod (3) and rotatably connected to the top end of the reciprocating screw (8).

8. The hand-cranked video screen trolley according to claim 7, characterized in that: The bevel gear set (9) is arranged at the bottom end of the reciprocating screw (8), and the input end of the bevel gear set (9) is connected to a handle (12).

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