The present invention relates to the technical field of photography and videography, in particular to a gear fine-tuning pan-tilt. The gear fine-tuning pan-tilt includes a rotating base, a roll worm support seat, a roll adjusting assembly, a pitch adjusting assembly, and a bearing seat arranged in sequence from bottom to top; the pitch adjusting assembly of the complete gear structure is located on the above, providing large-angle pitch ability, and the roll adjusting assembly located below adopts an arc-shaped rack structure, which reduces the interference to the pitching movement of the upper assembly and makes the height of the pan-tilt smaller. The arc opening of the arc-shaped rack faces upwards, so that the rotation axis is closer to the center axis of the lens, the camera displacement is small during the leveling process, and the unintended picture movement is small. The upper and lower combination of the two structures strengthens the swing ability of the top of the pan-tilt in the limited size, and is therefore more convenient to use: firstly aiming at the subject through the rotating base, and then leveling the left and right, and then determining the pitch angle. The camera always maintains the left and right level during pitching process. There is no need to level the left and right again after the pitch angle is changed, and roll deviation will not occur when the camera pitches and the lens is moved.

A platform to be used to secure objects for delivery by air. As a platform is lowered toward the ground, the legs of the platform touch the ground and interact with each other to stabilize the platform. A stable platform does not tip over. The platform may stabilize itself even when lowered onto uneven terrain. As the platform is lowered, the legs, except the last leg, move upward or inside the body of the platform until the last leg touches the terrain. On uneven terrain, the legs of the platform move upward or inside different amounts, so the legs have different lengths. The last leg to touch locks the other legs so that they cannot move up or down thereby stabilizing the platform. An incompressible material is used to detect when the last leg touches the terrain and to lock the other legs.

A horizontal protective device (10) for a medical display hanger comprises an upper ring (1), a middle ring (2), a lower ring (3), an upper rotating shaft (4) and a lower rotating shaft (5), wherein the upper ring (1) is connected to the bottom of a medical pendant (6), the lower ring (3) is connected to the top of the medical display hanger (7), and the middle ring (2) is provided with a total of four holes (8) in front, rear, left, and right portions thereof; one end of the upper rotating shaft (4) is fixedly connected to the upper ring (1), and the other end of the upper rotating shaft (4) passes through one of the holes (8) of the middle ring (2) to form a shaft-hole clearance fit; one end of the lower rotating shaft (5) is fixedly connected to the lower ring (3), and the other end of the lower rotating shaft (5) passes through a further one of the holes (8) of the middle ring (2) to form a shaft-hole clearance fit; and the upper rotating shaft (4) and the lower rotating shaft (5) are spatially perpendicular to each other. The medical display hanger (7) can be subjected to tilt avoidance in the event of an accidental collision in any horizontal direction.

The present disclosure relates to the field of display technologies, and provides a display apparatus, including: a support and a display module, wherein the support includes a support part and a rotation part; a frame is disposed at a periphery of the display module, and includes two first frame segments which are oppositely arranged and two second frame segments which are oppositely arranged; one end of the rotation part is pivoted to the support part; a rotation axis of the rotation part is a center line of the rotation part; the other end of the rotation part is fixedly connected to any one of the first frame segments or the second frame segments; the axis of the rotation part is at a first included angle with the frame; and the first included angle is used for switching of the display module between a landscape-screen mode and a portrait-screen mode.

A gear fine-tuning pan-tilt includes a rotating base, a roll worm support seat, a roll adjusting assembly, a pitch adjusting assembly, and a bearing seat arranged in sequence from bottom to top; the pitch adjusting assembly of the complete gear structure is located on the above, and the roll adjusting assembly located below adopts an arc-shaped rack structure, which reduces the interference to the pitching movement of the upper assembly and makes the height of the pan-tilt smaller. The arc opening of the arc-shaped rack faces upwards, so that the rotation axis is closer to the center axis of the lens. The upper and lower combination of the two structures strengthens the swing ability of the top of the pan-tilt in the limited size. The structure is able to be aimed at the subject through the rotating base, and leveled the left and right, and determined the pitch angle.

A solar tracker assembly is provided which includes a support column, a torque tube or torsion beam connected to the support column, a mounting mechanism attached to the torque tube or torsion beam, a drive system connected to the torque tube or torsion beam, and a spring counter-balance assembly connected to the torque tube or torsion beam. An exemplary spring counter-balance assembly comprises a bearing housing and a bushing disposed within the bearing housing and configured to be slideably mounted onto the torque tube or torsion beam, and one or more compressible cords made of a flexible material. The compressible cords are located between the bushing and the bearing housing and provide damping during rotational movement of the solar tracker assembly. An exemplary spring counter-balance assembly is provided including at least one top bracket and at least one bottom bracket, at least one spring, a damper, and a bracket. An exemplary spring counter-balance assembly comprises a bearing housing and a bushing disposed within the bearing housing and configured to be slideably mounted onto the torque tube or torsion beam. The spring counter-balance assembly may include at least one coil spring and a rotational stop. The bushing may be made of an elastomeric material and define one or more air spaces.

An angle adjustment and rotation system comprising a first element attachable to a luminaire stand, and a second element configured to be attachable to a luminaire head, the first element and second element comprising substantially complementary shapes, and an attaching element configured to have a first state in which it tightly attaches the first element to the second element and a second state in which it movably attaches the first element to the second element. In the second state, the attaching element enables a rotation over substantially 180 degrees of the second element with respect to the first element. A method of controlling the orientation of a luminaire head connected to a luminaire stand is also proposed, preferably using the proposed system.

A screen support frame includes a base and a supporting member that includes a supporting member mounting portion, which has one end mounted to the base and an opposite end formed with a protrusion, and a supporting member rotating portion including a receiving hole in which the protrusion of the supporting member mounting portion is received. The supporting member rotating portion includes rails, between which a longitudinally movable member is arranged. A frontward projection arm extends from one side of the longitudinally movable member. A screen fixing portion is mounted to the frontward projection arm of the longitudinally movable member of the supporting member rotating portion and includes symmetrically arranged elastic members and symmetrically arranged friction members. The screen fixing portion further includes a rotating disc. The present invention provides effects of adjusting of angle of rotation, vertical position, elevational angle, and sideway rotating angle.

A camera built into a cylindrical housing couples to a stand with a stand member that inserts into an opening having a magnet attracted to ferromagnetic material integrated in the stand member. The stand member holds the ferromagnetic material in an adapter interior that integrates a tilt hinge rotationally coupled to the stand member and fixedly coupled to the ferromagnetic material to provide tilt of the camera relative to the stand member about a rotation axis internal to the camera when the stand member adapter inserts in to the camera housing opening.

A base plate for the mounting thereon of photographic equipment includes leveling screw assemblies securely attached to the base plate. Each leveling screw assembly includes a leveling screw and a controlling mechanism for housing and retaining the leveling screw while enabling the leveling screw to: (a) be deployed at various selected angles relative to the base plate to grip an underlying surface; (b) be rotated to enable up-down motion between the leveling screws and the base plate; and (c) be retracted to a predetermine position alongside the base plate for safe storage and ease of reuse.