Position adjustment assembly and prompter

1 . A position adjustment assembly, comprising:

a base;

a telescopic seat, wherein a bottom of the telescopic seat is movably installed on the base, the telescopic seat comprises an outer shell and an inner shell slidably nested inside the outer shell, and the inner shell is telescoped along the outer shell;

a limit sleeve connected to the outer shell;

a positioning column slidably installed on the limit sleeve; and

an operation piece,

wherein a bottom of the outer shell is slidably installed on the base; and

one end of the positioning column directly faces the base, another end of the positioning column faces the operation piece, and the operation piece is configured to move to drive the positioning column to press or release the base.

2 . The position adjustment assembly of claim 1 , wherein a telescopic member is provided inside the telescopic seat, one end of the telescopic member is connected to the outer shell, and another end of the telescopic member is connected to the inner shell.

3 . The position adjustment assembly of claim 2 , wherein the telescopic member comprises:

a screw fixed to the outer shell;

a moving rod threaded on an outer side of the screw and rotatably connected to the inner shell; and

a driving member configured to drive the moving rod to rotate relative to the screw, so that the moving rod spins out or spins in the screw to drive the inner shell to extend or retract relative to the outer shell.

4 . The position adjustment assembly of claim 2 , wherein the telescopic member comprises:

a screw fixed to the inner shell;

a moving rod threaded on an outer side of the screw and rotatably connected to the outer shell; and

a driving member configured to drive the moving rod to rotate relative to the screw, so that the moving rod spins out or spins in the screw to drive the inner shell to extend or retract relative to the outer shell.

5 . The position adjustment assembly of claim 3 , wherein the driving member comprises a driven member fixed on an outer side of the moving rod, an active member cooperating with the driven member, and a second driving member;

wherein an upper end of the outer shell is provided with a first avoidance notch extending in a telescoping direction of the inner shell, the active member is passed through the inner shell and the first avoidance notch in sequence and extended to an outer side of the outer shell, and the second driving member is located on the outer side of the outer shell and connected to the active member.

6 . The position adjustment assembly of claim 5 , wherein the active member is configured to be a worm, the driven member is configured to be a worm gear, and the worm gear is fixed on the outer side of the moving rod; the second driving member is configured to be a knob for operating a rotation of the worm.

7 . The position adjustment assembly of claim 5 , wherein the active member comprises a rod and a worm, the driven member is configured to be a worm gear, and the worm gear is fixed on the outer side of the moving rod; the second driving member is configured to be a knob for operating a rotation of the worm; and

one end of the rod is coupled with the worm, the other end of the rod is passed through the inner shell and the first avoidance notch in sequence and extended to the outer side of the outer shell, and the knob is located on the outer side of the outer shell and connected to the active member.

8 . The position adjustment assembly of claim 1 , wherein the inner shell further comprises a second avoidance notch, the limit sleeve comprises a threaded hole, an axis of the threaded hole intersects an axis of the limit sleeve, the limit sleeve is passed through the second avoidance notch and arranged inside the inner shell;

a top end of the positioning column is arc-shaped or hemispherical;

the operation piece is configured to be a screw cooperating with the threaded hole, one end of the screw is connected to a first driving member, another end of the screw is arc-shaped or hemispherical; an arc-shaped surface or a hemispherical end face of the screw faces an arc-shaped surface or a hemispherical end face of the positioning column when the screw is threaded through the threaded hole; and

the arc-shaped surface or hemispherical end face of the screw is configured to abut or move away from the arc-shaped surface or hemispherical end face of the positioning column to push the positioning column to press or to release the base.

9 . The position adjustment assembly of claim 8 , wherein an axis of the threaded hole located at the limit sleeve is perpendicular to an axis of the limit sleeve.

10 . A prompter, comprising:

a reflection member;

a front support plate; and

the position adjustment assembly of claim 1 ,

wherein the front support plate is configured to place a display device, the reflection member is configured to reflect content displayed by the display device.