6results about How to "Meet different usage requirements" patented technology

The present application relates to polyester material, disclose a kind of aliphatic-aromatic polyester and its preparation method and application.The light transmittance of the aliphatic-aromatic polyester is greater than 90% when the thickness is 5-100mm, and the elongation at break of the aliphatic-aromatic polyester is 50-1050%.The preparation method comprises the following steps: (1) under esterification reaction conditions, aliphatic diol monomer containing the structure shown in formula (I), aromatic monomer containing the structure shown in formula (II) and catalyst are mixed to carry out first stage reaction, and obtain prepolymer;(2) under polycondensation reaction conditions, the second stage reaction is carried out to the prepolymer.The aliphatic-aromatic polyester not only has good toughness, but also has good light transmission performance.

The utility model provides a kind of far image display device, including image source, optical module, window and shell.Image source is configured as exit image light.Optical module is set in the light path downstream of image source, including at least one free curved mirror, to receive the image light amplification and reflection of image source exit.Optical module is set in the light path downstream of window, and reflected image light is emitted by window.Image source and optical module are set in shell, and reflected image light is emitted to the outside of shell by the position of window in shell.Window includes two mutually spaced and non-light-transmitting sub-windows.The distance between the shape center of two sub-windows is 50-80mm.Or window is connected whole, and optical module deflects image light, so that the optical axis of image light reflected by free curved mirror is perpendicular to window.The embodiment of the utility model is beneficial to simplify optical module, simplify far image display device structure, reduce volume, reduce light loss, and meet different use requirements.

The utility model discloses a mechanical keyboard with an under-shaft composite pad, and belongs to the technical field of mechanical keyboards. Comprising a positioning plate and a PCB, the positioning plate is provided with a key hole and is provided with a shaft body unit with a positioning rod and an electrode pin, and the PCB is provided with a shaft body connecting seat. An under-shaft composite pad is clamped between the positioning plate and the PCB, the under-shaft composite pad comprises a flexible pad layer and a sound absorption pad which are overlapped and glued or welded, and a plurality of avoiding hole groups are synchronously punched. The receding hole set is provided with a center rod hole, an electrode penetrating hole, a lamp bead receding hole, a positioning hole and the like, and electric connection and assembly positioning of the shaft body unit and the PCB are achieved. According to the keyboard, the assembly process is simplified, the hole site precision is improved through synchronous blanking of the under-shaft composite pad, and the defective rate is reduced.

This invention discloses a computer case with an adjustable power supply mounting position and arbitrarily oriented placement. It includes a case frame, four side panels mounted on the top, bottom, left, and right sides of the case frame, front and rear panels mounted on the front and rear ends of the case frame, and a heat dissipation fan module mounted within the case frame and capable of emitting light. The four side panels and the front and rear panels form a mounting cavity with the case frame. A mounting bracket for mounting a graphics card and / or motherboard is provided within the case frame. The mounting bracket divides the mounting cavity into main and secondary mounting chambers. The main mounting chamber has at least one first mounting position on the side closest to the mounting bracket; the secondary mounting chamber has a second mounting position. The power supply is mounted in either the first or second mounting position, with its power interface facing or exposed in the secondary mounting chamber. One of the four side panels has a cable outlet. By interchangeably assembling the four side panels, the side panel with the cable outlet does not serve as a support surface, allowing the computer case to be placed in any orientation.

The utility model discloses a pulley assembly which comprises a wheel carrier and a pulley block installed on the wheel carrier, and the pulley block is provided with more than two pulleys arranged in the left-right direction. The pulley is mounted on the wheel carrier in an up-and-down moving manner; wherein the pulley is provided with a wheel and a wheel shaft, the wheel is installed on the wheel frame through the wheel shaft, and the wheel shaft is installed on the wheel frame in an up-and-down movable mode; adjusting wheels are arranged on the portions, on the left side and the right side of the wheel shaft, of the wheel frame, the adjusting wheels can be installed on the wheel frame in a left-right moving mode, and the wheel shaft makes contact with the adjacent adjusting wheels. Thus, the adjusting wheels are arranged on the pulleys and used for adjusting the heights of the wheels in a self-adaptive mode, the wheels in each row can make effective contact with the rails, stress of each wheel is balanced, the doors and the windows can be pushed and pulled more smoothly, abrasion between the wheels and the rails can be reduced, and the service life of the pulley assembly and the service life of the doors and the windows are prolonged.

The utility model discloses a kind of air source heat pump units with double cold double temperature heat recovery function, including air conditioner side compressor;Heat recovery heat exchanger;Air conditioner air disc temperature regulating system, communicate with air conditioner side compressor, including air conditioner air disc side heat exchanger;Air conditioner floor heating temperature regulating system, communicate with air conditioner side compressor, air conditioner floor heating temperature regulating system includes air conditioner floor heating side heat exchanger;Water cooling temperature regulating system, communicate with air conditioner side compressor by heat recovery heat exchanger, water cooling temperature regulating system includes water cooling heat exchanger.By being equipped with air conditioner air disc temperature regulating system and air conditioner floor heating temperature regulating system can realize double temperature output, satisfy the temperature regulation of fan coil and floor heating, realize multiple temperature output, greatly save cost;Through water cooling heat exchanger heat exchange, fan coil and floor heating can be cooled and regulated, on the basis of air source temperature regulation, realize temperature water source regulation, realize double cold effect.