CN208129811U - A desk cross arm scissor lift screen - Google Patents

Abstract

The utility model discloses a cross-arm shear type lifting screen of an office desk, which comprises a lifting upper supporting rod, a lifting lower supporting rod, an upper cross shearing arm, a lower cross shearing arm and a lifting mechanism; the left ends of the lifting upper supporting rod and the lifting lower supporting rod are respectively provided with an upper hollow chute and a lower hollow chute, and the right ends of the lifting upper supporting rod and the lifting lower supporting rod are respectively provided with an upper shearing arm rotating shaft and a lower shearing arm rotating shaft; the upper end of the upper cross shearing arm is connected with the upper shearing arm rotating shaft, and the lower end of the upper cross shearing arm is provided with a lower sliding wheel and is positioned in the lower hollow chute; the lower end of the lower cross shearing arm is connected with the lower shearing arm rotating shaft, and the upper end of the lower cross shearing arm is provided with an upper sliding wheel and is positioned in the upper hollow chute; the upper cross shearing arm and the lower cross shearing arm are both arranged on a shearing arm cross shaft. The utility model discloses can adopt a lifting screw or rack drive desk screen to go up and down, and the desk stationarity is better when going up and down, can not take place the slope.

Description

A desk cross arm scissor lift screen

technical field

The utility model relates to the technical field of screen desk products, in particular to a desk cross-arm scissor lift screen.

Background technique

In the prior art desks with a screen that can be lifted, the screen lifting mechanism usually needs to be equipped with multiple lifting support devices, such as lifting screws or racks, because only one lifting screw or rack often causes the screen to be raised and lowered during the lifting process. The tilt occurs in the center, which increases the friction resistance of the screen lifting, and will cause certain wear and tear on the screen; however, the linkage mechanism of multiple lifting screws or racks is relatively complicated, which affects the overall structure simplicity and manufacturing cost of the screen desk. .

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a desk cross-arm scissor lift screen, which can use a lifting screw or rack to drive the desk screen to lift, and the desk is stable when it is lifted. No tilting will occur.

The technical scheme that the utility model solves its technical problem adopts is:

A cross-arm scissor lift screen for a desk, comprising a lifting upper support bar and a lifting lower support bar arranged horizontally and parallel to each other, an upper cross scissor arm arranged between the lifting upper support bar and the lifting lower support bar And the lower cross scissor arm, and the lifting mechanism arranged between the lifting upper support rod and the described lifting lower support rod; the left end of the lifting upper support rod is provided with an upper hollow chute, and the upper hollow chute Set along the length direction of the lifting upper support rod, the right end of the lifting upper support rod is provided with an upper scissor arm shaft; the left end of the lifting lower support rod is provided with a lower hollow chute, and the lower hollow chute is It is arranged along the length direction of the lifting lower support rod, and the right end of the lifting lower support rod is provided with a lower scissor arm shaft; the upper end of the upper cross scissor arm is connected to the upper scissor arm shaft. The lower end is provided with a lower sliding wheel, and the lower sliding wheel is located in the lower hollow chute; the lower end of the lower cross shear arm is connected to the lower shear arm shaft, and the upper end of the lower cross shear arm is provided with an upper sliding wheel. The upper sliding wheel is located in the upper hollow chute; the midpoints of the lengths of the upper cross scissor arm and the lower cross scissor arm are both arranged on the cross axis of the scissor arm.

As a further improvement of the above technical solution, the lengths of the upper cross scissor arm and the lower cross scissor arm are the same, and the cross axis of the scissor arm is arranged horizontally and perpendicular to the elevating upper support rod and the elevating lower support rod; The upper hollow chute is located directly below the lower hollow chute, and the lengths of the upper hollow chute and the lower hollow chute are the same; below.

As a further improvement of the above technical solution, the lifting upper support rod and the lifting lower support rod are both long plate-shaped structures, the upper hollow chute communicates with the horizontal sides of the lifting upper support rod, and the lower lifting support rod The hollow chute communicates with the horizontal two sides of the lifting lower support rod.

As a further improvement of the above technical solution, a telescopic strut is arranged in the lower hollow chute, the telescopic strut is coaxially connected to the strut cylinder, and the axial direction of the strut cylinder is horizontal and perpendicular to the lower hollow slide Groove; the telescopic strut is located on the right side of the midpoint of the length of the lower hollow chute, and the distance between the telescopic strut and the right end of the lower hollow chute is greater than or equal to the diameter of the lower sliding wheel.

As a further improvement of the above technical solution, the height difference between the top surface and the bottom surface of the telescopic support rod is greater than the height difference between the top surface and the bottom surface of the lower hollow chute, and the top surface and the bottom surface of the lower hollow chute The bottom surfaces are all provided with limiting gaps for placing the telescopic struts.

As a further improvement of the above technical solution, the lift mechanism includes a vertically arranged drive rack, a horizontally arranged drive shaft and a drive gear sleeved on the drive shaft, the drive gear and the drive rack are connected to each other. engage.

Compared with the prior art, the beneficial effects of the utility model are:

The desk cross-arm scissor lift screen provided by the utility model can use a lift screw or rack to drive the desk by setting the lift upper support rod, the lift lower support rod, the upper cross scissor arm and the lower cross scissor arm. The screen is raised and lowered, and the desk is stable when it is raised and lowered, and it will not tilt, which avoids increasing the frictional resistance of the screen as it moves up and down, and avoids wearing and tearing the screen.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural schematic diagram of a desk cross arm scissor lift screen described in the utility model;

FIG. 2 is a schematic diagram of an enlarged structure at point A in FIG. 1 .

Detailed ways

Referring to Fig. 1 to Fig. 2, Fig. 1 to Fig. 2 are structural schematic diagrams of a specific embodiment of the present invention.

As shown in Figures 1 to 2, a cross-arm scissor lift screen for a desk includes a lifting upper support rod 1 and a lifting lower support rod 2 arranged horizontally and parallel to each other, and the lifting upper support rod 1 and the lifting support rod 2 are arranged on the lifting upper support rod 1 and the lifting support rod 2. The upper cross scissor arm 3 and the lower cross scissor arm 4 between the lifting lower support rods 2, and the lifting lifting mechanism 5 arranged between the lifting upper support rod 1 and the described lifting lower support rod 2; The left end of the upper support rod 1 is provided with an upper hollow chute 11, and the upper hollow chute 11 is arranged along the length direction of the lifting upper support rod 1, and the right end of the lifting upper support rod 1 is provided with an upper scissor arm shaft 12. The left end of the lift lower support rod 2 is provided with a lower hollow chute 21, the lower hollow chute 21 is arranged along the length direction of the lift lower support rod 2, and the right end of the lift lower support rod 2 is set There is a lower shear arm shaft 22; the upper end of the upper cross shear arm 3 is connected to the upper shear arm shaft 12, and the lower end of the upper cross shear arm 3 is provided with a lower sliding wheel 31, and the lower sliding wheel 31 is located in the lower hollow In the chute 21; the lower end of the lower cross shear arm 4 is connected to the lower shear arm rotating shaft 22, the upper end of the lower cross shear arm 4 is provided with an upper sliding wheel 41, and the upper sliding wheel 41 is located in the upper hollow In the chute 11 ; the midpoints of the lengths of the upper crossing shearing arm 3 and the lower crossing shearing arm 4 are both arranged on the crossing axis 42 of the shearing arm. The lifting mechanism 5 includes a vertically arranged driving rack 51 , a horizontally arranged driving shaft 52 and a driving gear sleeved on the driving shaft 52 , and the driving gear and the driving rack 51 mesh with each other.

Further, the lengths of the upper cross scissor arm 3 and the lower cross scissor arm 4 are the same, and the cross axis 42 of the scissor arm is arranged horizontally and perpendicular to the lifting upper support bar 1 and the lifting lower support bar 2; The upper hollow chute 11 is located directly below the lower hollow chute 21, and the lengths of the upper hollow chute 11 and the lower hollow chute 21 are the same; the upper scissor arm shaft 12 is located at the lower Just below the shearing arm rotating shaft 22. Both the lifting upper support bar 1 and the lifting lower support bar 2 are long strip-shaped structures, the upper hollow chute 11 communicates with the horizontal sides of the lifting upper support bar 1 , and the lower hollow chute 21 The horizontal two sides of the lifting lower support rod 2 are communicated.

Further, a telescopic strut 6 is arranged in the lower hollow chute 21, the telescopic strut 6 is coaxially connected to the strut cylinder, and the axial direction of the strut cylinder is horizontal and perpendicular to the lower hollow chute 21 The telescopic strut 6 is located on the right side of the midpoint of the length of the lower hollow chute 21, and the distance between the telescopic strut 6 and the right end of the lower hollow chute 21 is greater than or equal to the lower sliding wheel 31 diameter of. The height difference between the top surface and the bottom surface of the telescopic support rod 6 is greater than the height difference between the top surface and the bottom surface of the lower hollow chute 21, and the top surface and the bottom surface of the lower hollow chute 21 are provided with Place the limiting notch 23 of the telescopic strut 6 .

When the screen is lifted, the drive shaft 52 drives the drive gear to rotate, thereby driving the drive rack 51 to rise, and the right end of the lifting upper support rod 1 rises under the support of the drive rack 51, so that The height difference between the right end of the upper cross scissor arm 3 and the lower cross scissor arm 4 increases, and the height difference between the left end of the upper cross scissor arm 3 and the lower cross scissor arm 4 also increases equidistantly thereupon, so The lower sliding wheel 31 moves from the left end of the lower hollow chute 21 to the right end, and the upper sliding wheel 41 also moves from the left end of the upper hollow chute 11 to the right end, and then the telescopic pole 6 extends into the In the lower hollow chute 21, the lower sliding wheel 31 is prevented from moving to the left, so that the screen can be kept in a high position stably.

On the contrary, when the screen is lowered, the telescopic support rod 6 withdraws from the lower hollow chute 21, the driving rack 51 descends, and the right end of the lifting upper support rod 1 descends accordingly, and the upper cross shear The height difference between the two ends of the arm 3 and the lower cross scissor arm 4 gradually decreases until the lifting upper support bar 1 and the lifting lower support bar 2 are stacked on each other, and the screen is in a low position.

The preferred embodiment of the utility model has been described in detail above. Of course, the utility model can also adopt different forms from the above-mentioned embodiment. Those skilled in the art can make equivalents without violating the spirit of the present invention. Transformation or corresponding changes should all belong to the protection scope of the present utility model.

Claims (6)

1. A desk cross-arm scissor-type lifting screen, characterized in that: it includes a horizontal and parallel lifting upper support rod (1) and a lifting lower support rod (2), and is arranged on the lifting upper support rod (1) ) and the upper cross shear arm (3) and the lower cross shear arm (4) between the lifting lower support rod (2), and the upper support rod (1) and the lower lifting support rod ( 2) The lifting mechanism (5) between them; the left end of the lifting upper support rod (1) is provided with an upper hollow chute (11), and the upper hollow chute (11) is arranged along the lifting upper support rod (1) is set in the length direction, the right end of the lifting upper support rod (1) is provided with an upper scissor arm rotating shaft (12); the left end of the lifting lower support rod (2) is provided with a lower hollow chute (21), The lower hollow chute (21) is arranged along the length direction of the lifting lower support rod (2), and the right end of the lifting lower support rod (2) is provided with a lower scissor arm shaft (22); the upper cross The upper end of the scissor arm (3) is connected to the upper scissor arm shaft (12), and the lower end of the upper cross scissor arm (3) is provided with a lower sliding wheel (31), and the lower sliding wheel (31) is positioned on the lower hollow slide In the slot (21); the lower end of the lower cross shear arm (4) is connected to the lower shear arm shaft (22), and the upper end of the lower cross shear arm (4) is provided with an upper sliding wheel (41), the The upper sliding wheel (41) is located in the upper hollow chute (11); the length midpoints of the upper cross scissor arm (3) and the lower cross scissor arm (4) are both arranged on the cross axis of the scissor arm (42) up. 2. A desk cross-arm scissor lift screen according to claim 1, characterized in that: the upper cross scissor arm (3) and the lower cross scissor arm (4) have the same length, and the scissors The arm cross axis (42) is arranged horizontally and perpendicular to the lifting upper support rod (1) and the lifting lower support rod (2); the upper hollow chute (11) is located in the lower hollow chute (21) directly below, and the length of the upper hollow chute (11) and the lower hollow chute (21) are the same; the upper scissor arm shaft (12) is located directly below the lower scissor arm shaft (22) . 3. A desk cross-arm scissor lift screen according to claim 1, characterized in that: the lift upper support rod (1) and the lift lower support rod (2) are both strip-shaped structures , the upper hollow chute (11) communicates with the horizontal sides of the lifting upper support bar (1), and the lower hollow chute (21) communicates with the horizontal sides of the lifting lower support bar (2). 4. A desk cross-arm scissor lift screen according to claim 1, characterized in that: a telescopic strut (6) is arranged in the lower hollow chute (21), and the telescopic strut (6) ) is coaxially connected to the strut cylinder, the axial direction of the strut cylinder is horizontal and perpendicular to the lower hollow chute (21); the telescopic strut (6) is located at the length of the lower hollow chute (21) On the right side of the midpoint, and the distance between the telescopic support rod (6) and the right end of the lower hollow chute (21) is greater than or equal to the diameter of the lower sliding wheel (31). 5. A desk cross-arm scissor-type lifting screen according to claim 4, characterized in that: the height difference between the top surface and the bottom surface of the telescopic support rod (6) is greater than that of the lower hollow chute (21 ) height difference between the top surface and the bottom surface, and both the top surface and the bottom surface of the lower hollow chute (21) are provided with limiting gaps (23) for placing the telescopic struts (6). 6. A desk cross-arm scissor lift screen according to claim 1, characterized in that: the lift mechanism (5) includes a vertical drive rack (51), a horizontal drive shaft ( 52) and a drive gear sleeved on the drive shaft (52), the drive gear and the drive rack (51) mesh with each other.