A planar ejector is disclosed, including an ejecting mechanism and a motor mounted on a side of an interior of the ejecting mechanism. A top of the ejector is provided with a compress mechanism, and a side of a bottom of the compress mechanism is provided with a support plate. The ejecting mechanism includes a first shell, a side of the first shell is clamping connected to a second shell, the first shell and the side of the first shell are opened with an ejecting slot, and the first shell and a side of a bottom of the first shell are fixedly mounted with a first handle. By setting the motor and increasing the utilization efficiency of the motor, the force area is also shared with the two eject gears, allowing the motor's power to be fully utilized and thus increasing the permissible capacity of the ejector.

The present invention generally relates to portable golf ball launching device for analyzing golf balls for short game performance attributes. The preferred golf ball launcher is able to shoot a golf ball at the ground at preselected speed, spin rate and angle.

Provided herein are devices for propelling string through the air. The device includes a housing and two wheels. The housing can include an upper projection and a lower projection configured to form an upper gap and a lower gap operable to receive a looped string. The upper projection and the lower projection can linearly align with a gap between the two wheels.

Provided herein are devices for propelling string through the air. The device includes a housing and two wheels. The housing can include an upper projection and a lower projection configured to form an upper gap and a lower gap operable to receive a looped string. The upper projection and the lower projection can linearly align with a gap between the two wheels.

A ball pitching device includes: a body portion including an upper frame and a lower frame; a first rotation shaft portion supported by the upper frame; a pitching unit configured to pitch a ball and rotate about the first rotation shaft portion and including a first pitching wheel and a second pitching wheel; a first pitching angle adjusting unit adjusting a vertical pitching angle by adjusting a relative length between a bottom surface of the upper frame and the pitching unit; and a second rotation shaft portion connecting the upper frame to the lower frame to be rotatable on a horizontal plane. The first rotation shaft portion is disposed between a center of the first pitching wheel and a center of the second pitching wheel.

A ball feeding device includes: a ball transfer tube comprising a ball lifting tube and a ball feeding tube; and a ball transfer module connected to the ball lifting tube and transferring the ball. The ball transfer module includes: a first rotating portion and a second rotating portion connected to opposite end portions of the ball lifting tube, respectively; a driving motor connected to the first rotating portion; a link connecting the first rotating portion and the second rotating portion; and a main support portion supporting the ball, the main support portion coupled to the link and passing through the ball lifting tube.

A racket-free tennis training device includes a maneuverable platform on which an elevation mechanism is mounted. A ball receiving and shooting mechanism is mounted on the elevation mechanism. The ball receiving and shooting mechanism includes a ball receiving mechanism, a ball management mechanism, and a ball shooting mechanism. The ball receiving mechanism includes a ball receptacle. The ball management mechanism includes a ball collection barrel and an advancing mechanism. The above arrangement allows for correctly receiving a tennis ball from an opponent site and then serving a ball to the opponent site to simulate an actual tennis game.

A position adjusting device includes a first support member, a yaw axis motor disposed on the first support member, a second support member rotatable; disposed on the first support member through the yaw axis motor, and a pitch axis motor disposed on the second support member and used for driving the load to rotate. The yaw axis motor is used for driving the second support member to rotate about a yaw axis to cause the load to rotate about the yaw axis. The pitch axis motor is used for driving the load to rotate about a pitch axis.

A position adjusting device includes a first support member, a yaw axis motor disposed on the first support member, a second support member rotatable; disposed on the first support member through the yaw axis motor, and a pitch axis motor disposed on the second support member and used for driving the load to rotate. The yaw axis motor is used for driving the second support member to rotate about a yaw axis to cause the load to rotate about the yaw axis. The pitch axis motor is used for driving the load to rotate about a pitch axis.

Provided herein is a string shooting device having a string capable of generating lift when propelled from the string shooting device and a guide to readily attach and detach the string from the string shooting device. A string shooting device described herein includes: a body; a housing attached to the body; a pair of wheels, where at least one of the pair of wheels is a driven wheel; and a string, where the string includes a surface texture configured to increase air friction in response to the string being propelled through the air by the pair of wheels. The string of an example embodiment defines an axis along which the string extends, and where the string includes a plurality of fibers extending away from the axis.