31results about How to "Strong support and stability" patented technology

A portable projection and display system can include a frame assembly having one or more folding trusses, a counterweight bar arranged on a rearward bottom portion of the frame to help provide a stable base, and an adjustable boom. A projector can be mounted on one end of an adjustable boom. The boom can be configured to be capable of adjusting a distance between the projector and the display screen. The boom can be mounted to the frame with a hinged connection to permit it to act as a lever to raise and lower the projector. An adjustable boom bar can further be provided. The adjustable boom bar can be attached to an end of the boom opposite the projector such that adjustment of the boom bar raises and lowers the projector via a lever action about a fulcrum.

The invention relates to the technical field of photography and video shooting equipment, particularly to a button mechanism of a tripod and the tripod. The button mechanism of the tripod comprises angle clamping structures and button structures, and further comprises supporting structures, wherein the angle clamping structures are fixedly arranged on a body of the tripod; the button structures comprise buttons rotatably arranged on foot shaft sleeves of the tripod through first shafts; the buttons are provided with combination parts applicable to combination with clamps of the angle clamping structures; the combination parts and the clamps are combined to lock the opening angle of supporting feet of the tripod; when the combination parts and the clamps are combined, the supporting structures are propped against the buttons; and included angles exist between the extension lines of the connecting lines from supporting parts of the supporting structures to the combination parts and the extension lines of the ends, facing the angle clamping structures, of the supporting feet. According to the button mechanism of the tripod and the tripod provided by the invention, supporting stability of the supporting feet of the tripod is strengthened, cost of the angle clamping structures is reduced, product structure is further simplified, and market competitiveness of products is improved.

The invention discloses a double-layer rotatable indoor safety angle. The angle comprises a safety frame, the lower end of the safety frame is provided with a triangular plate,the front surface of thesafety frame is provided with an upper combined door and a lower combined door, the overlook cross section of the safety frame isfan-shaped,safety space is formed between the top surface of the safety frame and the upper end surface of the triangular plate,one side of the upper combined door and the upper portion of one side of the safety frame are hinged by a door hinge I, one side of the lowercombined door and the lower portion of one side of the safety frame are hinged by a door hinge II,the upper end of the lower combined door is fixedly connected with the edge of the lower end of a partition flat plate, the separation flat plate is located in the middle of the safety space, the separation flat plate divides the upper and lower parts of the safety space into a first safety angle anda second safety angle, the first safety angle and the second safety angle are not only can be used as two storage space, but also can be used as two independent safety space, and compared with a traditional indoor table cabinet, theangle can provide powerful help for people.

The present invention relates to the technical field of photography and camera equipment, in particular to a tripod button mechanism and a tripod, wherein the tripod button mechanism includes an angle locking structure fixedly arranged on the body of the tripod; the button structure includes a first shaft rotatably arranged on the tripod The button on the foot sleeve of the tripod, the button has a joint part suitable for combining with the clamping position of the angle clamping structure, and the jointing part is combined with the clamping position to lock the opening angle of the supporting foot of the tripod; it also includes a supporting structure, at the joint part When combined with the card position, the support structure and the button abut, and the extension line of the connection line from the support point of the support structure to the joint part forms an included angle with the extension line of the support foot towards the end where the angle card position structure is located. The tripod button mechanism and the tripod provided by the invention are beneficial to enhance the stability of the support legs of the tripod, reduce the cost of the angle locking structure, further simplify the product structure, and improve the market competitiveness of the product.

The invention discloses a stair mould convenient to use. The stair mould comprises a base, a supporting block is welded to the bottom end of the base, an open groove is formed in the base, a bottom mould plate is fixedly arranged at the top end of the base, and a first sliding groove is formed in the bottom mould plate; a side mould plate is tightly welded to one side of the top end of the base, asecond sliding groove is formed in one side of the side mould plate, and a sliding block is slidably arranged in the second sliding groove; a second inserting hole is formed in one side of the sliding block, a fixing pin is inserted into the second inserting hole, and a movable mould plate is fixedly arranged on the other side of the sliding block; and a clamping groove is formed in the movable mould plate, a pouring mould plate is arranged at the bottom end of the movable mould plate, a side plate is welded to one side of the bottom end of the movable mould plate, and the bottom of the sideplate is movably arranged in the first sliding groove. According to the stair mould convenient to use, idler wheels are movably mounted at the bottom end of a movable block, the mould moves conveniently, and practicability is higher.

The invention provides an elevator maintenance bottom pit supporting device. The elevator maintenance bottom pit supporting device comprises a supporting column, a cavity, an air pressure device, a main supporting device and auxiliary supporting devices; the supporting column is vertically arranged in an elevator bottom pit and internally provided with the cavity; the air pressure device is fixedto the bottom of the interior of the cavity; the main supporting device is arranged on the upper portion of the interior of the cavity, and the bottom of the supporting device is fixedly connected with the upper end of an output shaft of the air pressure device; the two opposite side walls of the supporting column are provided with the auxiliary supporting devices; and the main supporting device is in transmission connection with the auxiliary supporting devices. The elevator maintenance bottom pit supporting device further comprises a transmission device, a controller, an infrared distance measuring sensor and a speed sensor, wherein, the transmission device is arranged between the main supporting device and the auxiliary supporting devices, the infrared distance measuring sensor is arranged at the top end of the supporting column, the speed sensor is arranged on an elevator car, the infrared distance measuring sensor and the speed sensor are in communication connection with a controller, and the controller is in signal connection with the air pressure device. The elevator maintenance bottom pit supporting device is ingenious in structural design, high in supporting stability andintelligent degree and capable of providing a safe maintenance environment for maintenance personnel.