35results about How to "Difficult to catch" patented technology

An injection needle apparatus in which an operation for relatively moving an outer tube 4 and an inner tube 5 is performed to project and retract a needle body 12 from and into a distal end of the outer tube 4, and to carry out a movement of rotation of the needle body 12 at a predetermined angle by relative forward and backward movements of the outer tube 4 and inner tube 5 in their longitudinal directions every time the forward and backward movement operations is repeated, thereby enabling changing a direction of a needlepoint 14 of the needle body 12 at each angle.

An injection needle apparatus in which an operation for relatively moving an outer tube 4 and an inner tube 5 is performed to project and retract a needle body 12 from and into a distal end of the outer tube 4, and to carry out a movement of rotation of the needle body 12 at a predetermined angle by relative forward and backward movements of the outer tube 4 and inner tube 5 in their longitudinal directions every time the forward and backward movement operations is repeated, thereby enabling changing a direction of a needlepoint 14 of the needle body 12 at each angle.

The invention relates to a motor machine for table tennis training. The motor machine is composed of a snail type shell, a motor, an ox horn type funnel, a bracket and an adjusting rod, wherein the snail type shell is connected with the motor and the ox horn type funnel through rivets; the bracket is connected with the motor and the ox horn type funnel through a supporting shaft; the motor is connected with the bracket through rivets; one end of the adjusting rod is connected with the bracket through a shaft while the other end is connected with the snail type shell through a small shaft. The motor machine for table tennis training is simple, reasonable and novel in structure, is convenient in operation, is used for performing partner training by replacing a table tennis training partner, is capable of increasing the training effect and is high in practicability.

The invention relates to an electromechanical volleyball training instrument, which consists of a motor, a helicoid casing, a bull horn type funnel, a groove wheel support frame and a track, wherein the helicoid casing is connected with the motor and the bull horn type funnel through a flange, the helicoid casing is connected with the groove wheel support frame through a rotating shaft, the groove wheel support frame is in rolling contact with the track, and the motor is welded with the groove wheel support frame. The electromechanical volleyball training instrument has the advantages that the structure is simple, reasonable and novel, the operation is simple and convenient, the electromechanical volleyball training instrument can replace volleyball training partners to realize partner training, the training effect can also be improved, and the practicability is high.

An automatic ball-serving device for sports tennis, comprising a main body, vertical boards are fixedly installed on both sides of the main body, and the tops of the vertical boards are respectively rotated and connected to movable boards, and a limit mechanism is also provided between each vertical board and the corresponding movable board to limit The position mechanism can limit the rotation of the movable plate. The movable plates are all U-shaped structures. There are slide plates inside the movable plates. The slide plates are respectively connected with the corresponding movable plates through the first telescopic rods. Both the telescopic rod and the movable rod of the second telescopic rod are hollow structures. The single-chip microcomputer control system can randomly retrieve a tangent angle from the data storage module, and the tangent angle can be stretched to different lengths through the second telescopic rod. When the tennis ball contacts the elastic plate, the trajectory of the tennis ball changes, which greatly improves the performance It has the disadvantage of a single technical serving route, and the two elastic boards can be alternately tangent to the tennis ball, which can further enrich the movement track of the tennis ball, and is more suitable for tennis players to use in single-person training.

Electric equipment for tennis training comprises a snail shaped shell, a motor, a bull horn shaped funnel, a bracket and a transmission rod, wherein the snail shaped shell is connected with the motor and the bull horn shaped funnel by flanges, the bracket is connected with the motor and the bull horn shaped funnel by a supporting shaft, the motor is connected with the bracket by bolts, one end of the transmission shaft is connected with the bracket by an eccentric shaft, and the other end is connected with the snail shaped shell by a small shaft. The electric equipment is novel, simple and reasonable in structure and easy and convenient to operate, by utilizing the electric equipment, the partner training of a tennis training partner can be replaced, and the training effect can be improved at the same time, so the practicability is high.